A hydrogen concentration-controllable safe reaction tank for leaching of waste battery powder, includes at bed provided with supporting frames and a driver; a rotary acid pumping barrel articulated with the supporting frames, the driver being configured to drive the rotary acid pumping barrel to rotate, and a delivery pipe mounted on the bed and passing through the rotary acid pumping barrel where a screw for pushing material is disposed in the delivery pipe; the delivery pipe includes a pouring section located in the rotary acid pumping barrel, the pouring section is provided with a pouring opening at an upper portion and acid leakage holes at a bottom, and at least one acid pumping plate is mounted on an inner wall of the rotary acid pumping barrel.
A preparation method of nano-scaled iron phosphate, includes the steps of: adding a surfactant and a polymer microsphere to an iron salt solution to obtain a mixed liquid; adding a phosphate solution to the mixed liquid for reaction to obtain an iron phosphate slurry; performing solid-liquid separation after removing the polymer microsphere from the iron phosphate slurry, drying and calcining the obtained solid to obtain a nano-scaled iron phosphate.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
3.
Method for preparing lithium iron phosphate by recycling waste batteries
A method of preparing lithium iron phosphate by recycling and utilizing waste batteries. The method may include pre-processing a waste lithium iron phosphate battery to obtain lithium iron phosphate powder, adding alkaline liquid to the lithium iron phosphate powder, and filtering to obtain a filter residue; an iron source, a lithium source or a phosphorus source to the filter residue, and performing ball milling to obtain a ball-milled product; preparing a carbon source solution, and adding a surfactant to the carbon source solution to obtain a mixed solution; mixing the ball-milled product and the mixed solution, performing spray pyrolysis to obtain a high-temperature powder, spraying atomized water to the high-temperature powder to remove impurities, and then calcining to obtain a finished product of lithium iron phosphate.
A method for safely oxidising roasting NdFeB powder material. The method may include: S1: magnetizing and drying the NdFeB powder material; S2: heating the magnetized and dried NdFeB powder material to spontaneous combustion, and then preparing the spontaneous combustion product into a powder; and S3: magnetizing and then oxidising roasting the powder to obtain NdFeB oxide.
A fire-extinguishing agent capable of extinguishing the combustion of aluminum slag, and a preparation method therefor and the use thereof. The fire-extinguishing agent comprises the following raw materials: a sulfate, a chlorine salt, a mineral, a silica gel, a surfactant and a stearate. The main materials of sulfate and chlorine salt are solid waste containing sulfate and chlorine salt obtained by separating high-salt wastewater generated during a resynthesis process of a positive electrode material of a waste lithium battery. The solid waste containing sulfate and chlorine salt is used as a material for a fire-extinguishing agent, which can effectively recycle waste resources. The wastewater of a large amount and high salt content produced in the synthesis process of the positive electrode material of the waste lithium battery is separated and evaporated to obtain more solid wastes containing sulfate and chlorine salt, which can be used as the main material for preparing fire-extinguishing agents on a large scale.
A treatment method of scrapped positive electrode slurry, includes the following steps: pretreating the scrapped positive electrode slurry to obtain a slurry solution; performing electrophoresis coagulation and filter pressing on the slurry solution to obtain a liquid phase and a solid phase; and performing gradient roasting on the solid phase to obtain a positive electrode material.
A reaction kettle cleaning apparatus, includes a kettle body and a stirrer, the stirrer being located in the kettle body and including a stirring rod and a stirring portion, where a movable frame is disposed on the stirring rod and is movable along the stirring rod; and a cleaning device is disposed on the movable frame is configured to clean the kettle body; and the reaction kettle cleaning apparatus further includes a movable control apparatus configured to control the movable frame to move.
A method for removing impurities from a waste lithium battery safely through pyrolysis. The method may include: (1) performing primary roasting on electrode fragments of a waste lithium battery, quenching, and then layered screening to obtain a current collector fragment and an electrode material; (2) mixing and grinding the electrode material and a grinding aid, soaking the mixture in an alkali liquor, filtering and taking out filter residues to obtain electrode powder, and (3) performing secondary roasting on the electrode powder to obtain a positive electrode material.
The invention discloses a method for preparing graphene by mechanical exfoliation and application thereof. The method includes the following steps of: (1) dispersing graphite raw material in a foaming agent aqueous solution to obtain a graphite pre-dispersing solution; and (2) subjecting the graphite pre-dispersing solution to milling, washing with water, and centrifugal classification, to obtain the graphene; wherein the foaming agent aqueous solution includes the following components: sodium alpha-olefin sulfonate, sodium alcohol ether sulphate, diethanolamine coconut fatty acid, polyethylene glycol, and water. In the invention, the foaming agent produce a large amount of stable and fine foam in a closed milling cavity, which can produce jostle effect, support the graphite, and increase the contact area between the graphite and the milling medium, so as to achieve good exfoliation effect.
The invention discloses a method and application for a safe recovery of waste anode pieces of lithium ion batteries. The method comprises the following steps: crushing and sieving the waste anode piece to obtain an anode powder A and a crushed aluminum slag; mixing the crushed aluminum slag with an acid solution, stirring under ultrasound, and then performing wet sieving to obtain an aluminum slag and a battery powder; the obtained aluminum slag is washed with water, then rinsed with an explosion suppressant, centrifuging to obtain an explosion suppressing aluminum slag, and then packed and compressed to obtain an aluminum slag block; connecting the two ends of the aluminum slag block to a positive plate and a negative plate of a DC electrode respectively, applying a current to melt the aluminum slag block, and cooling to obtain a safe aluminum slag block.
4 structure contains the doping elements, which work together to improve the interfacial activity of the material and introduce more electrochemically active sites.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/02 - Electrodes composed of, or comprising, active material
12.
Ternary single crystal positive electrode material, preparation method therefor and use thereof
Disclosed are a ternary single crystal positive electrode material, a preparation method therefor and use thereof. The preparation method comprises the following steps: mixing a ternary polycrystalline micropowder, raising a temperature, carrying out a primary sintering, and lowering the temperature to obtain an intermediate; subjecting the intermediate to jet pulverization to obtain a single crystal material, washing the single crystal material with water, and centrifugally drying the single crystal material to obtain a material with a residual alkali content of less than 1500 ppm; and adding a coating agent to the material, raising a temperature, carrying out a secondary sintering, and lowering the temperature to obtain the ternary single crystal positive electrode material. In the present disclosure, by using a jet pulverization device to open a polycrystalline material to form small single crystal particles, the electrochemical performance and the energy density of the material is improved.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 4/02 - Electrodes composed of, or comprising, active material
13.
METHOD FOR PURIFYING NICKEL-COBALT-MANGANESE LEACHING SOLUTION
Disclosed is a method for purifying a nickel-cobalt-manganese leaching solution. The method may include: heating a nickel-cobalt-manganese leaching solution, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain iron-aluminum slag and a liquid with iron and aluminum removed therefrom; heating the liquid with iron and aluminum removed therefrom, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain copper slag and a solution with copper removed therefrom; heating the solution with copper removed therefrom, adding an alkaline solution thereto, adjusting the pH, reacting same, and filtering same to obtain a nickel-cobalt-precipitated solution and nickel-cobalt-manganese hydroxide; and adding water into nickel-cobalt-manganese hydroxide for slurrying, heating same, adding an acidic solution for dissolution, adjusting the pH, reacting same, heating same, adding a manganese powder thereto, adjusting the pH, and filtering same to obtain iron-aluminum slag and a nickel-cobalt-manganese sulfate solution.
Disclosed is a method for producing battery-grade nickel sulfate by using laterite nickel ore comprising the following steps: sorting the laterite nickel ore to obtain lump ore and sediment ore; crushing the lump ore, and then performing heap leaching, to obtain a crude nickel sulfate solution A; separating the sediment ore to obtain high chromium ore, low iron, high magnesium ore, and high iron, low magnesium ore, and drying, roasting, reducing, and sulfurating the low iron, high magnesium ore to obtain low nickel matte; blowing and performing water extraction on the low nickel matte, and then performing oxygen pressure leaching, to obtain a crude nickel sulfate solution B; performing pressure leaching on the high iron, low magnesium ore to obtain a crude nickel sulfate solution C; and performing extraction on the crude nickel sulfate solutions A, B, and C, and then evaporating and crystallizing, to obtain battery-grade nickel sulfate.
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
The present invention relates to a method for recycling iron and aluminum in a nickel-cobalt-manganese solution. The method comprises the following steps: leaching a battery powder and removing copper therefrom to obtain a copper-removed solution, and adjusting the pH value in stages to remove iron and aluminum, so as to obtain a goethite slag and an iron-aluminum slag separately; mixing the iron-aluminum slag with an alkali liquor, and heating and stirring same to obtain an aluminum-containing solution and alkaline slag; and heating and stirring the aluminum-containing solution, introducing carbon dioxide thereto and controlling the pH value to obtain aluminum hydroxide and an aluminum-removed solution.
The present invention relates to the field of metallurgy. Disclosed are a method for preparing a high-nickel type ternary precursor by means of ferronickel production conversion and an application thereof. The method comprises the following steps: drying laterite nickel ore, carrying out a pre-reduction reaction, and then carrying out deep reduction smelting, separation and refining to obtain a nickel-iron alloy; adding a sulfur-containing material into the nickel-iron alloy for blowing, and then adding coke powder and quartz to obtain high-grade matte nickel; adding concentrated sulfuric acid into the high-grade matte nickel for reaction, and carrying out separation and pressure leaching to obtain nickel sulfate; adding a cobalt source and a manganese source into the nickel sulfate, then adding a reducing agent, a precipitator, water, and a complexing agent, and carrying out a nucleation reaction and nuclear growth to prepare a high-nickel ternary precursor. In the present invention, on the basis of an original RKEF process, the high-grade matte nickel is prepared by taking the ferronickel which is excessive in yield and low in price as an intermediate, adding the sulfur-containing material, and adding a blowing device, and then the high-grade matte nickel is used for producing the nickel sulfate, so that the nickel recovery rate is further increased while the raw material supply pressure of the nickel sulfate is relieved to a great extent.
C25C 1/08 - Electrolytic production, recovery or refining of metals by electrolysis of solutions of iron group metals, refractory metals or manganese of nickel or cobalt
17.
PRE-LITHIATED GRAPHENE, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
23xx, and R-Li, wherein R is reduced graphene oxide, and 1/6≤x≤1. The pre-lithiated graphene is a composite of graphene and lithium, and graphene and a lithium-containing compound. In the composite, some lithium and graphene are linked by ionic bonds, and some lithium may form other lithium-containing compounds to be uniformly distributed on the surface of the thin film of graphene and lithium.
222/graphene-based composite material; then adding same to an organic solvent containing a divalent tin salt, followed by ultrasonic dispersing; and finally, adding a reducing agent, followed by ultrasonic dispersing, wherein the reducing agent can reduce graphene oxide and can also react with the divalent tin salt and the organic solvent together to generate elementary Sn, such that the silicon/tin-doped graphene-based composite material is obtained. The doping substances have very high theoretical specific capacity and can significantly improve the capacity performance of the composite material. The doping substances are ultrasonically and uniformly dispersed on graphene with a large specific surface area to assist the material in forming a stable and uniform SEI film in the cycle process of a battery, thereby improving the cycle stability. Moreover, graphene can effectively inhibit the volume expansion effect of metal substances.
Disclosed are a method for safe pyrolysis and impurity removal of a waste lithium battery and an application. The method comprises the following steps: performing primary roasting and quenching on electrode fragments of the waste lithium battery, and then screening to obtain fragments of a current collector and an electrode material; mixing and grinding the electrode material and a grinding aid, adding the mixture into alkali liquor for soaking, filtering and taking filter residues to obtain electrode powder; and performing secondary roasting on the electrode powder to obtain a positive electrode material. According to the method of the present invention, the bonding performance of a binder is reduced by performing primary roasting on the electrode fragments of the waste lithium battery, and meanwhile, the surface temperature of the electrode fragments of the waste lithium battery is rapidly decreased; because notches of the fragments of the current collector (aluminum foil and copper foil) are thinner, the temperature at the notch parts is decreased more quickly, contractility is first generated, and the notches of the fragments of the current collector are curled quickly; and therefore, openings of the fragments of the current collector and the electrode material of the waste lithium battery are larger, and the electrode material of the waste lithium battery is easier to fall off after screening.
233 formed after decomposition is reduced by using pulverized coal; and then iron and nickel valuable metals are recovered by using water quenching, ball milling and magnetic separation processes, jarosite slag is decomposed by using high temperatures into stable silicon-magnesium slag, thereby achieving environmentally friendly treatment of jarosite slag and solving the disposal problem of tailings from leaching low-grade laterite nickel ore by using sulfuric acid at atmospheric pressure and yellow sodium jarosite slag produced by iron removal.
Disclosed are a method for treating a scrapped positive electrode slurry, and an application. The method comprises the following steps: pretreating a scrapped positive electrode slurry to obtain a slurry solution; performing electrophoretic coagulation and pressure filtration on the slurry solution to obtain a liquid phase and a solid phase; and performing gradient roasting on the solid phase to obtain a positive electrode material. According to the method of the present invention, a scrapped positive electrode slurry is used as a raw material, and the scrapped positive electrode slurry is recovered using crushing, sorting, electrophoresis, and gradient roasting processes, without introducing a flocculating agent. The present invention has the advantages of thorough separation between an NMP solution and positive electrode powder, high recovery rates of organic matters and valuable metals, high production efficiency, etc., and thus not only improves economic benefits, but also reduces environmental pollution.
Disclosed in the present invention is a reaction kettle cleaning device, comprising a kettle body and a stirrer, the stirrer being located in the kettle body, and the stirrer comprising a stirring rod and a stirring portion, the stirring rod being provided with a moving frame, which can move along the stirring rod, and the moving frame being provided with a cleaner, which is used to clean the kettle body; and the reaction kettle cleaning device further comprising a movement control device, which is used to control the moving frame to move. The moving frame is controlled by means of the movement control device to move along the stirring rod, so as to enable the cleaner to move to a predetermined cleaning position for cleaning when cleaning is needed and be stored when cleaning is not needed, such that the cleaner does not need to be installed/removed, and thus, the cleaner will not affect production work, and is particularly suitable for working in a relatively sealed reaction kettle.
Disclosed in the present invention is a dustproof safety feeding device for power battery black powder acid leaching feeding, comprising a leaching tank, a discharging grid, and a material shaking assembly. The leaching tank comprises a feeding port. The discharging grid is installed in the feeding port and provided with a discharging hole. The material shaking assembly comprises a material shaking member and a driving device. The material shaking member is movably provided in the discharging hole, the driving device is connected to the material shaking member, and the driving device drives the material shaking member to move in the discharging hole. The feeding port of the present invention is provided with a discharging grid to prevent an operator from falling into the feeding port. The material shaking member and the driving device are installed, such that the bridging phenomenon of battery powder is eliminated, and the battery powder is prevented from blocking the feeding port.
The present invention relates to a method for recovering metal in laterite-nickel ore. The method comprises: using laterite-nickel ore slag as a raw material, mixing the laterite-nickel ore slag with compounding agents, and then grinding and sieving to prepare slag powder; mixing part of the slag powder, charcoal powder, and conditioning agents to prepare a material blank; roasting the material blank in a reducing atmosphere; crushing the roasted material blank into material blank powder; mixing and smelting the material blank powder and the residual slag powder to obtain a smelted product; mixing the smelted product with mixed acid, and performing leaching reaction to obtain a leaching solution; and stirring and mixing the leaching solution and a mixed seed crystal, and cooling and crystallizing to obtain a multi-metal salt crystal. According to the recovery method, triethanolamine, glycerol, and triisopropanolamine are used as compounding agents, humus and active lime are used as conditioning agents, the process is simple and easy to implement, raised dust is reduced, the metal recovery rate is high, and effective utilization of the laterite-nickel ore slag is achieved.
Disclosed are a method for recovering elemental copper in waste lithium-ion battery powder and an application. The method comprises the following steps: adding concentrated sulfuric acid into lithium-ion battery powder for an aging reaction, adding water and a reducing agent for a water immersion reaction, and performing solid-liquid separation to obtain a solid phase and a metal liquid; adding water to the solid phase to make a slurry, and adding an alkaline solution to adjust the pH to obtain a first graphite slurry; and sorting the first graphite slurry to obtain a second graphite slurry and elemental copper powder. In the present invention, concentrated sulfuric acid is used to carbonize organic matter in lithium-ion battery powder, so that the organic matter is decomposed, i.e. an active substance, copper and aluminum covered by the organic matter are decomposed. As a result, the active substance of the battery powder is stripped from copper foil and aluminum foil, which may further activate the active substance in the battery powder, thus increasing the leaching rate of the battery powder in a water immersion stage and reducing the leaching rate of copper.
Disclosed in the present invention are an iron phosphate precursor, a preparation method therefor, and the use thereof. The method for preparing the iron phosphate comprises the following steps: mixing and dissolving an iron source and a phosphorus source, adding a precipitation promoter, and stirring same to obtain molten metal; reacting by heating the molten metal, and filtering same to obtain an iron phosphate precipitate; pulping, filtering, washing, grinding, washing again and filtering the iron phosphate precipitate to obtain an iron phosphate dihydrate precipitate; and calcining the iron phosphate dihydrate precipitate to obtain an anhydrous iron phosphate. According to the present invention, in a sulphate-containing system, by means of selecting a phosphorus source and an iron source and then adding a precipitation promoter, heterogeneous precipitation occurs in the system. The heterogeneous precipitation is beneficial for the rapid growth of iron phosphate, and thus by-products of sulphates cannot be wrapped and precipitated in a timely manner, such that iron phosphate dihydrate which is loosely stacked in a sheet shape is obtained.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
27.
NANOSCALE IRON PHOSPHATE, PREPARATION METHOD THEREFOR AND USE THEREOF
Disclosed are a nanoscale iron phosphate, a preparation method therefor and the use thereof. In the method, a surfactant and polymer microspheres are firstly added to an iron salt solution to obtain a mixed solution; next, a phosphate solution is added to the mixed solution to react to obtain an iron phosphate slurry; after removing the polymer microspheres from the iron phosphate slurry, solid-liquid separation is carried out; and the obtained solid is then dried and calcined to obtain nanoscale iron phosphate. In the present invention, the surfactant and polymer microspheres are added in a reaction synthesis process, such that on the one hand, by dispersing ferric phosphate by means of a macromolecular substance such as the surfactant, the dispersibility of ferric phosphate is increased, and the morphology and size of ferric phosphate are controlled; on the other hand, due to the polymer microspheres, it is hard for the small iron phosphate particles generated by the reaction to aggregate under the dispersion of the polymer microspheres, thereby preventing particle agglomeration, and during vigorous stirring, the particles continuously collide with the polymer microspheres in the growth process, allowing for nano products having higher tap density to be obtained.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
28.
METHOD FOR PREPARING LITHIUM IRON PHOSPHATE BY RECYCLING WASTE BATTERIES
Provided is a method for preparing lithium iron phosphate by recycling waste batteries. First, waste lithium iron phosphate power batteries are pretreated to obtain pure lithium iron phosphate waste; next, each element is supplemented according to a ratio; and a lithium iron phosphate product is prepared by means of spray pyrolysis. The droplets of lithium iron phosphate sprayed by spray pyrolysis have high sphericity and uniform particle size distribution. After high temperature reaction, spherical lithium iron phosphate is obtained. The spheroidization of lithium iron phosphate is beneficial to increase the specific surface area of the material and increase the volume specific energy of the material. When removing impurities, waste heat of high-temperature lithium iron phosphate produced by spraying is used to atomize pure water to remove impurities by spraying, so that the atomized pure water is instantly evaporated, taking away impurities such as hydrogen chloride in the lithium iron phosphate particles. The prepared lithium iron phosphate cathode material has almost the same capacity and charge-discharge performance as the first synthesized lithium iron phosphate cathode material.
A fire-extinguishing agent capable of extinguishing the combustion of aluminum slag, and a preparation method therefor and the use thereof. The fire-extinguishing agent comprises the following raw materials: a sulfate, a chlorine salt, a mineral, a silica gel, a surfactant and a stearate. The main materials of sulfate and chlorine salt are solid waste containing sulfate and chlorine salt obtained by separating high-salt wastewater generated during a resynthesis process of a positive electrode material of a waste lithium battery. The solid waste containing sulfate and chlorine salt is used as a material for a fire-extinguishing agent, which can effectively recycle waste resources. The wastewater of a large amount and high salt content produced in the synthesis process of the positive electrode material of the waste lithium battery is separated and evaporated to obtain more solid wastes containing sulfate and chlorine salt, which can be used as the main material for preparing fire-extinguishing agents on a large scale.
44 +, Na+44 2-, F- and carbonates can be removed from the high-salt wastewater, and the cost can be indirectly reduced. A copper-manganese-doped aluminum sheet involves the addition of copper and manganese to aluminum, which accelerates the electrolysis of an aluminum electrode, increases the autolysis of the aluminum electrode, accelerates the treatment of wastewater by aluminum ions, and further prevents easy passivation of the aluminum.
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
31.
SAFE REACTOR FOR LEACHING OF WASTE BATTERY POWDER AND CAPABLE OF CONTROLLING HYDROGEN CONCENTRATION
Disclosed in the present invention is a safe reactor for leaching of waste battery powder and capable of controlling hydrogen concentration, comprising a platform, a rotary acid pumping cylinder, and a delivery pipe; the platform is provided with a support frame and a driving device; the rotary acid pumping cylinder is hingedly connected to the support frame; the driving device is used for driving the rotary acid pumping cylinder to rotate; the delivery pipe is mounted on the platform and passes through the rotary acid pumping cylinder; a screw used for material pushing is disposed in the delivery pipe; the delivery pipe comprises a pouring section located in the rotary acid pumping cylinder; the upper part of the pouring section is provided with a pouring port; the bottom of the pouring section is provided with acid leakage holes; at least one acid pumping piece is installed on the inner wall of the rotary acid pumping cylinder.In the present invention, cooperation of the screw and the delivery pipe are used to effectively prevent external air from communication with the air in the rotary acid pumping cylinder, thereby avoiding change in the volume concentration of hydrogen in the rotary acid pumping cylinder caused by mutual communication of air, preventing hydrogen from overflowing to the outside, and facilitating control of the volume concentration of hydrogen.
The present invention relates to the technical field of waste battery recovery. Disclosed are a method for safely leaching a waste battery and an application. The method comprises the following steps: discharging, roasting, and screening a waste lithium battery to obtain copper aluminum foil and battery powder; adding the battery powder to water, and then adding a floatation agent for performing floatation to obtain a floating material and a sediment; using lye to leach the floating material and filtering to obtain a filtrate b and a filter residue a; and washing the filter residue a, filtering to obtain a filter residue c, and adding a leaching agent and a reducing agent for leaching to obtain a leaching liquid. In the present invention, safe, efficient, and low-energy-consumption physical methods such as roasting, screening, and flotation are combined with chemical methods such as dilute alkali dissolution, and aluminum in the waste lithium battery can be removed from the source.
Disclosed in the present invention are a method for safely oxidizing and roasting a neodymium-iron-boron powder and the application thereof. The method comprises: magnetizing and drying a neodymium-iron-boron powder, igniting and spontaneously combusting the dried neodymium-iron-boron powder in an ignition furnace, then cooling, smashing and sieving the spontaneously combusted neodymium-iron-boron powder, magnetizing a undersize material, and then oxidizing and roasting same to obtain a neodymium iron boron oxide. According to the present invention, three-section step-by-step roasting is performed by means of low-temperature drying, medium-temperature ignition and high-temperature oxidation, and a spontaneous combustion risk of the neodymium-iron-boron powder is controlled in a medium-temperature ignition furnace, such that management, control and isolation are facilitated; the neodymium-iron-boron powder is magnetized, such that dust rising in a roasting process can be effectively avoided and a dust combustion and explosion risk is reduced; and the magnetized neodymium-iron-boron powder is in the form of radiation and cotton-wool, which increases the contact area with air, effectively improves the drying speed and oxidation degree, and reduces the energy consumption.
The present invention relates to the technical field of battery materials, and disclosed are doped iron phosphate, and a preparation method therefor and an application thereof. The doped iron phosphate has a particle size of 2.5-3.5 μm, tap density of 0.71-0.8 g/cm3and a specific surface area of 8.56-9.3 m2/g. According to the present invention, battery-grade iron phosphate with uniform distribution of doping elements can be prepared, condition components are easy to control, and industrial production is facilitated; the doped iron phosphate has the particle size of 2.5-3.5 μm and the tap density of 0.71-0.8 g/cm3. The problems of difficulty in doping and difficulty in improving the compaction caused by doping during the synthesis of lithium iron phosphate are avoided.
Provided is a method for preparing high-purity iron phosphate by using ferrophosphorus waste. The method comprises: first mixing ferrophosphorus waste with an acid solution for dissolving and leaching, adding iron powder to the leaching solution to remove copper, then adding fluoride to remove aluminum, performing solid-liquid separation, adding an ion exchange resin to the filtrate to perform deep impurity removal to obtain a refined ferrophosphorus solution, adding a phosphorus source or an iron source to the refined ferrophosphorus solution to adjust an iron-phosphorus ratio, adding an alkali solution to adjust the pH, then performing a stirring reaction to obtain iron phosphate dihydrate, and roasting the iron phosphate dihydrate to obtain the iron phosphate. The process is simple, the recovery rate of the iron phosphate is greater than 98%, excessive impurity ions are not introduced in the whole process, the solution is subjected to two-step impurity removal to obtain the refined ferrophosphorus solution, and the iron phosphate is roasted subsequently to remove decomposable impurities in the iron phosphate, so that the iron phosphate having higher purity is obtained, and the impurity content of the product is lower than 300 ppm.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
36.
RECOVERY METHOD FOR LITHIUM IRON PHOSPHATE WASTE AND APPLICATION
A recovery method for lithium iron phosphate waste and an application. The method comprises the following steps: mixing lithium iron phosphate waste with water to make a slurry, adding alkali to adjust a pH until the slurry is alkaline, heating for reaction, filtering and separating to obtain filter residue; dissolving the filter residue in acid, filtering and separating, taking a filtrate, adding an oxalate-containing solution for reaction, aging, filtering and separating to obtain a filter cake and a precipitation mother liquor; making the filter cake into a slurry, washing, and removing free water to obtain ferrous oxalate. First alkali is added to adjust the pH, then acid is used to dissolve the filter residue, solid-liquid separation is performed, the filter residue is removed, an oxalate-containing substance is added to the filtrate to heat up and precipitate to obtain a ferrous oxalate precipitate. Compared with the process for synthesizing ferrous oxalate from lithium iron phosphate waste, the process for synthesizing iron oxalate from lithium iron phosphate waste is easier to control, and the recovery rate of iron is higher, and the recovery rate of iron can reach 99%.
The present invention relates to the field of lithium-ion battery materials. Disclosed are an iron phosphate precursor and a preparation method therefor and an application thereof. The iron phosphate precursor has spherical micromorphology, a particle size D50 of 10-20 μm, a specific surface area of 1-3 m2/g, and a tap density of 1-1.5 g/cm3. In the present invention, ferric iron is selected as an iron source, phosphoric acid is then added into a ferric iron solution, and the morphology and particle size distribution of iron phosphate primary particles are controlled by controlling the pH and reaction temperature. The mode of adding phosphoric acid into ferric iron salt makes initial pH of a system very low, the reaction temperature is then controlled to be 70-100°C, spherical dense primary particles can be formed, sequentially stacked, and dried to obtain iron phosphate dihydrate having a low specific surface area and no internal voids, and the iron phosphate dihydrate has a high tap dense up to 1-1.5/cm3.
Disclosed in the present invention are a device and a method for safely storing aluminum slag. The device comprises a drying bin and a storage bin, wherein a side wall of the drying bin is provided with a first gas inlet pipe and a first gas outlet pipe; the first gas inlet pipe is connected to a gas drying fan; the first gas outlet pipe is sequentially connected to a deacidifying device, a dehydrogenating device and a first exhaust fan in a gas flow direction of the first gas outlet pipe; the storage bin is located below the drying bin; a feeding port of the storage bin is connected to a discharging port of the drying bin by means of a screw conveyor; a side wall of the storage bin is provided with a second gas inlet pipe and a second gas outlet pipe; a second drying fan is connected to the second gas inlet pipe; and an end of the second gas inlet pipe may be connected to an inert gas bottle. The whole safe storage process of the present invention is divided into a drying stage and a storing stage, and unsafe factors in drying and storage are effectively controlled separately, which can effectively prevent aluminum hydrolyzation from releasing heat, prevent inflammable and explosive accidents from occurring, and improving storage safety of aluminum slag.
F26B 9/06 - Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
39.
RECYCLING METHOD FOR CONTROLLING PARTICLE SIZE OF ALUMINUM SLAG AND APPLICATION OF RECYCLING METHOD
The present invention relates to the technical field of battery recycling. Disclosed are a recycling method for controlling the particle size of aluminum slag and an application of the recycling method. The recycling method comprises the following steps: crushing and sieving a positive electrode plate of a waste power battery, and then adding liquid nitrogen for crushing to obtain particulate matters; performing roasting, cooling, grinding, water adding, oscillating, and layering on the particulate matters to obtain an aluminum slag particle layer, a transition layer, and a positive electrode active powder layer; and performing secondary oscillation and layering on the aluminum slag particle layer and the transition layer to obtain aluminum slag particles and positive electrode active powder. According to the present invention, when low-temperature fine crushing is performed by adding the liquid nitrogen, the bonding performance of a binder is reduced, the positive electrode active substance and the binder are in an embrittlement state and are easy to be broken, and the aluminum slag still has certain toughness; selectively crushing at a low temperature is achieved due to a difference between embrittlement temperatures of different substances, the particle sizes of the crushed positive electrode active particles and binder particles, and the particle size of the aluminum slag particles are respective narrower in ranges, and conditions are created for subsequent separation and recycling.
33and HCO3-, and Ni, Co and Li are selectively leached out. When the Al in impurities is difficult to leach out, gathering small-particle aluminum into large-particle aluminum is a key point for controlling the generation of large-particle aluminum slag. Therefore, most of the impurity aluminum slag is effectively filtered out, and the impact of dangerous factors of small-particle aluminum slag in the recovery process of subsequent acid leaching recovery of metal elements such as Ni, Mn and Co is reduced.
Disclosed in the present invention are an iron phosphate waste cyclic regeneration method and an application thereof. The method comprises: mixing and dissolving iron phosphate waste and acid liquor to obtain an iron-phosphorus solution; taking a small part of the iron-phosphorus solution to prepare an iron phosphate precipitant; then adding the iron phosphate precipitant into the remaining iron-phosphorus solution for a reaction to obtain iron phosphate dihydrate precipitate; using part of the iron phosphate dihydrate precipitate as a precipitant for the reaction in the next batch; and preparing the rest of the iron phosphate dihydrate precipitate into anhydrous iron phosphate. According to the present invention, the iron phosphate precipitant is prepared to be used for subsequent preparation of iron phosphate, the iron phosphate prepared each time can be used for next-time preparation of iron phosphate, and the process is simple in preparation process, needs alkali liquor only in a preparation stage of the precipitant, does not use the alkali liquor in subsequent production, is more environmentally friendly, high in product consistency, low in costs, high in productivity, low in energy consumption, and suitable for large-scale industrial production.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
42.
METHOD FOR LEACHING NICKEL-AMMONIA SOLUTION FROM NICKEL-IRON ALLOY IN WET PROCESS AND APPLICATION
The present invention relates to the field of metallurgy. Disclosed are a method for leaching a nickel-ammonia solution from a nickel-iron alloy in a wet process and an application. The method comprises the following steps: performing oxidizing roasting on a crude nickel-iron alloy, and then performing spray granulation to obtain iron nickel oxide powder; adding the iron nickel oxide powder into an alkali solution, heating, performing ammonia leaching reaction, and filtering to obtain iron slag and a leachate; and extracting the leachate, and removing oil from a raffinate, thereby obtaining a nickel-ammonia solution. According to the present invention, nickel and iron are oxidized and roasted, and then spray granulation and atmospheric-pressure ammonia leaching are performed, such that high-pressure leaching energy consumption is saved; in addition, the obtained nickel-ammonia solution is directly used for ternary precursor synthesis, such that an ammonium source that should have been introduced in a synthesis process is saved.
C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
Provided are a material mixing process for preparing a high-nickel positive electrode material and the use thereof. The material mixing process comprises: adding a precursor and a lithium source to a material mixing device for mixing to obtain a mixed material, and after the mixed material is uniformly mixed, spraying a liquid into the mixed material while the material mixing device keeps operating, and discharging the material after liquid spraying is completed, and placing the resulting mixed material into a sagger for sintering, wherein the liquid is one or more of pure water, ethanol, N-methyl pyrrolidone, an additive solution or an additive dispersion. By means of the spraying mixing process, the mixed material can be mixed more uniformly, and due to the presence of a proper amount of mist droplets, the surface of the lithium source is slightly soluble in water, which can adsorb the precursor, such that the bulk density of the mixed material is improved, the loading amount in the sintering process is increased by 5-40%, and the productivity is increased by 10-30%.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
44.
LITHIUM TRANSITION METAL OXIDE MATERIAL COATED WITH FAST ION CONDUCTOR AND PREPARATION METHOD THEREFOR
1+a(1-m-n)nm1-bb2cdefg433. A lithium transition metal oxide coated with a fast ion conductor has a low impedance, good cyclic performance, and good safety performance at a high voltage, especially when the charging voltage is greater than 4.62 V, 4.65 V, or a higher voltage. The lithium transition metal oxide can be obtained by sintering one time, and the lithium transition metal oxide material coated with a fast ion conductor can be obtained by sintering a second time.
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
axyz2b232223252333, titanium sol, aluminum sol, titanium-aluminum sol, aluminum isopropoxide, butyl titanate, dialuminum hydrogen phosphate, or lithium tungstate. A superficial layer coating is achieved by means of high temperature sintering after a metal oxide is coated, and superficial layer coating of the material facilitates preventing the spread of micro-cracks produced during cycling due to an internal stress change and a structural change of the material in the process of electrical charge and discharge.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
46.
METHOD FOR RECOVERING VALUABLE METALS FROM WASTE LITHIUM-ION BATTERIES
A method for recovering valuable metals from waste lithium-ion batteries, the method comprising first adding concentrated sulfuric acid to battery powder for aging and leaching, then adding water for water leaching, and subjecting same to solid-liquid separation to obtain a first kish slag and a first valuable metal liquid; and adding an acid liquor to the first kish slag for acid leaching, then adding a reducing agent for reduction leaching further adding an alkali for precipitating impurities and finally subjecting same to solid-liquid separation to obtain a second kish slag and a second valuable metal liquid.
Disclosed are a preparation method for a high-nickel ternary precursor and the use thereof. The preparation method comprises: under certain conditions, simultaneously introducing an alkali liquor and a metal salt solution for a precipitation reaction to obtain particles with D50 being 7.0-15.0 μm, then introducing seed crystals, adjusting the D10 of the particles to be 2.0-7.0 μm, then stopping introducing the seed crystals, continuously introducing the alkali liquor and the metal salt solution, collecting the overflow material, and when the particle size of the particles grows to D50 being 7.0-15.0 μm, repeating the operation of adding the seed crystals, continuously collecting the overflow material, and finally, washing, drying and screening the collected material so as to obtain a high-nickel ternary precursor. In the present invention, the seed crystals are used to adjust the particle size, such that the particle size is kept in a proper wide distribution, the bulk density of the precursor is improved; and an intermittent-continuous production process by intermittent seed crystal addition and continuous discharging is used, such that the height constancy of a particle growth environment in the production process is ensured, and defects caused by the environmental fluctuation in the crystal grains are reduced.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
A safe pickling apparatus. The apparatus comprises a protective cover (100), screen cylinders (900), a grabbing and conveying system, and a drying device (1100). The protective cover (100) is connected to a gas purifier (200); a pickling tank (300), a washing tank (400), and a dewatering tank (500) are arranged in the protective cover (100); the pickling tank (300), the washing tank (400), and the dewatering tank (500) are each provided with a rotating bracket (600); the grabbing and conveying system is arranged in the protective cover (100), and the grabbing and conveying system comprises grabbing assemblies (1010) which can grab the screening cylinders (900) and convey same; the drying device (1100) comprises a feeding pipe (1110), and the feeding pipe (1110) is in communication with the protective cover (100). Also provided is a method for using the safe pickling apparatus to perform safe pickling. The whole pickling process is strong in continuity and high in efficiency.
Provided are a regeneration method for a waste ternary positive electrode material, and the use thereof, which belong to the technical field of battery material recycling. The regeneration method comprises the following steps: drying, crushing and sieving a waste ternary positive electrode material to obtain a positive electrode powder; adding the positive electrode powder into an alkali solution for reaction, and stirring, washing and filtering same to obtain filter residue; drying the filter residue, then adding carbonized asphalt and mixing same, and carrying out reductive calcination to obtain a mixture; measuring the contents of nickel, cobalt, manganese, aluminum and lithium in the mixture, adding a nickel source, a cobalt source, a lithium source and a manganese source, adding polyethylene glycol, ball milling same, adding water to obtain a suspension, and carrying out spray granulation on the suspension to obtain a ternary precursor; and carrying out two-stage sintering on the ternary precursor to obtain a regenerated ternary positive electrode material. A waste ternary material is converted into an oxide by means of weak reduction, so that the limitation of a physical method for restoring a waste battery is solved.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
The present invention belongs to the technical field of batteries, and disclosed are a method for preparing a lithium cobaltate soft pack battery and the application thereof. The preparation method comprises the following steps: preparing a lithium cobaltate positive electrode bar; preparing a graphite negative electrode bar; preparing an aluminum-plastic film; performing positive and negative electrode bar screening, welding tabs and winding a battery cell; packaging a lithium cobaltate soft pack battery; performing liquid injection, primary sealing, formation and secondary sealing on the lithium cobaltate soft pack battery; and performing capacity grading on the lithium cobaltate soft pack battery to obtain the lithium cobaltate soft pack battery. The method for preparing a lithium cobaltate soft pack battery in a laboratory room temperature environment as provided by the present invention is simple in terms of operation, has low environment requirements, can be used in a laboratory lacking a drying room condition, and has reduced research and development costs and laboratory maintenance costs.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
51.
METHOD FOR SAFE RECOVERY OF WASTE ELECTRODE PLATES OF LITHIUM ION BATTERIES AND APPLICATION THEREOF
Provided are a method for the safe recovery of waste electrode plates of lithium ion batteries and an application thereof, relating to the technical field of battery recovery. The method comprises the following steps: crushing waste positive electrode plates and sieving to obtain positive electrode powder A and crushed aluminium slag; mixing the crushed aluminium slag with an acid solution, performing ultrasonic treatment whilst stirring, and then performing wet sieving to obtain aluminium slag and battery powder; washing the obtained aluminium slag with water, then rinsing with an explosion suppressant, centrifuging to obtain explosion-suppressing aluminium slag, and then packaging and compressing to obtain an aluminium slag block; respectively connecting two ends of the aluminium slag block to a positive electrode plate and a negative electrode plate of a direct current electrode, applying current to melt the aluminium slag and, after cooling, obtaining a safe aluminium slag block. Washing with a saturated calcium hydroxide solution makes residual acid react with the saturated calcium hydroxide solution to neutralise the acid during the process of aluminium slag production, preventing the aluminium slag from reacting with the residual acid to avoid the release of hydrogen and the generation of heat, ensuring the safety of the storage process.
Provided is a method for modifying lithium battery negative electrode material graphite, the method comprising the following steps: taking a graphite negative electrode material and phthalic anhydride, and mixing and heating same for a reaction to obtain a mixture; adding an alcohol to the mixture for a reaction, and performing suction filtration to obtain a pre-modified graphite material; and mixing the pre-modified graphite material with a modifier, then heating same for a reaction, adding hot water, dissolving and stirring same, and performing suction filtration to obtain the modified graphite, wherein the modifier is o-phenylenediamine. The modification treatment of graphite using phthalic anhydride has few treatment steps, the reaction raw materials are cheap and readily available, and the modification treatment on the negative electrode graphite material has important application value. The present invention is more suitable for industrial application requirements in practical production processes and suitable for large-scale production applications.
Disclosed in the present invention are a method for separating ferronickel from a lateritic nickel ore leach solution and preparing iron phosphate, and an application. The method comprises: adjusting the pH of a lateritic nickel ore leach solution to 0.5-1.5, dropwise adding a composite sulfide precipitant for reaction, adding a coagulating agent, and filtering to obtain nickel sulfide precipitates and a filtrate; then adding an oxidant and a phosphoric acid solution to the filtrate, adjusting the pH for reaction, and performing heating, concentration and crystallization to obtain iron phosphate. According to the present invention, a reaction process is controlled under a high acidity condition, and a reaction kinetics process is subtly controlled, so that one-step, efficient and low-cost separation of ferronickel is implemented, the separation effect is good, and the impurity content of iron phosphate is low.
Provided are a method for preparing a silicon-carbon composite material using negative electrodes of waste lithium-ion batteries and the application. The method comprises subjecting negative electrode sheets to a heat treatment, crushing and sieving to obtain an undersized graphite negative electrode powder; then dissolving the graphite negative electrode powder in an acid solution, stirring same, carrying out solid-liquid separation, removing a precipitate, and washing and drying the precipitate to obtain a graphite material; then dissolving asphalt in kerosene to obtain a mixed solution, adding the graphite material and a silicon source, and stirring same until the kerosene is completely volatilized to obtain a mixed material; and finally carbonizing the mixed material to obtain the carbon-silicon composite material. The synthesis of the silicon-carbon composite material by recycling the negative electrode materials of waste lithium-ion batteries as raw materials has relatively low costs and a simple operation, and the resulting product is excellent in performance, such that waste resources can be further utilized, and the present invention plays an important role in environmental protection and resource reutilization.
Disclosed are a device and method for gradient utilization and residue recycling of a waste sagger. The device comprises a sandblasting chamber, a sand collection hopper, a cyclone separator, and a spiral conveyor. A polishing device is arranged in the sandblasting chamber, and comprises a feeding conveyor belt, a discharging conveyor belt, a turning platform, a drive device, a clamping device, and a sandblasting and polishing assembly. According to the present invention, by means of the cooperation of movement, clamping, turning, and movement, the bottom of the waste sagger can be polished in batches, so that the device has the advantages of high polishing efficiency, simple operation, and simple structure.
B24C 1/00 - Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
B24C 1/04 - Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
B24C 1/10 - Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
56.
METHOD FOR EXTRACTING NICKEL FROM NICKEL-CONTAINING IRON POWDER AND PREPARING IRON PHOSPHATE, AND APPLICATION
Disclosed are a method for extracting nickel from nickel-containing iron powder and preparing iron phosphate, and an application. The method comprises the following steps: (1) adding sulfuric acid and phosphoric acid into nickel-containing iron powder, and performing heating and stirring to obtain a mixed slurry; (2) adding an oxidant into the mixed slurry, performing heating and stirring, and filtering to obtain iron phosphate and a nickel sulfate solution; (3) washing, filtering, and drying the iron phosphate to obtain an iron phosphate product; and (4) adding a neutralizer into the nickel sulfate solution, performing heating and stirring, and filtering to obtain a nickel sulfate solution subjected to impurity removal. In the present invention, an acid mixture is used to perform acid leaching on the nickel-containing iron powder, and because the acid mixture is added in proportion to the content of iron and nickel in raw materials, nickel can enter the solution in ionic form, and iron is present in a solid phase in an iron phosphate form, so that nickel and iron in the solid phase can be effectively separated. The process is simple, the energy consumption is low, and the cost is also low; meanwhile, the present invention has great economic benefit and is suitable for industrial production and application.
The present invention belongs to the technical field of the recycling of spent lithium-ion batteries, and provided is a process for selectively recovering current collectors from spent lithium-ion batteries, the process comprising the following steps: (1) discharging, drying, and incinerating the spent lithium-ion batteries, and then performing crushing, screening, and ball-milling to obtain a ball-milled material; (2) carrying out water washing and magnetic separation on the ball-milled material to obtain a low-magnetism current collector copper-aluminum mixture; and (3) pulping the low-magnetism current collector copper-aluminum mixture, and performing a shaking table treatment to obtain current collector copper and current collector aluminum, respectively. In the present invention, by ingeniously using the fact that the metals nickel, cobalt, and manganese have magnetic properties and copper and aluminum are non-magnetic, and the principle of the specific gravity of copper being significantly higher than that of aluminum, and by means of processes, such as a heat treatment, ball milling, hydraulic separation, a cyclone, magnetic separation, and a shaking table treatment, for the separation of copper and aluminum without new impurity ions being introduced throughout the separation process, the subsequent impurity removal process is greatly simplified, the purity of both the copper and aluminum current collectors are improved, and the sales value of the current collectors are improved.
The present invention belongs to the field of hydrometallurgy. Disclosed are a method for separating nickel and iron from a nickel-iron alloy and use. The method comprises the following steps: dissolving a nickel-iron alloy in an acid solution, filtering, and collecting the filtrate to obtain an acidic nickel-iron solution; adjusting the pH of the acidic nickel-iron solution, heating, stirring, adding iron powder, and continuing heating and stirring to obtain sponge nickel and nickel precipitation mother liquor; subjecting the nickel precipitation mother liquor to oxidation and iron precipitation to obtain iron hydroxide slag and an iron precipitation mother liquor; and dissolving sponge nickel in sulfuric acid, filtering, collecting the filtrate, raising the temperature, and adjusting the pH, so as to obtain a nickel sulfate solution. In the present invention, after the nickel-iron alloy is dissolved using the acid solution, nickel in the solution is displaced by iron powder to obtain the sponge nickel, the nickel precipitation mother liquor is oxidized to produce iron hydroxide, the nickel content is less than 0.4%, the iron precipitation mother liquor can be returned to a leaching section, and the sponge nickel can be subjected to acid dissolution, impurity removal, and evaporative crystallization to obtain a battery-grade nickel sulphate product.
xyz22, wherein 0.2≤x≤1, 0≤y≤0.5, 0≤z≤0.6, 0.8≤x+y+z≤1; the positive electrode material precursor is stacked sheet shaped, and the particle size broadening coefficient of the positive electrode material precursor is K, and K≤0.85. Using a controlled crystallization method and in combination with a theoretical model of Lamer nucleation and growth, the preparation process of a precursor can be effectively controlled and adjusted; in addition, the prepared precursor has the morphological features of concentrated particle size distribution and high proportion of active crystal planes {010}. Under the magnification rate of 20C, capacity retention rate can reach 91.33%.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
60.
METHOD FOR PREPARING GRAPHENE BY MECHANICAL EXFOLIATION AND APPLICATION THEREOF
Provided are a method for preparing graphene by mechanical exfoliation and an application thereof, the method comprising the following steps: (1) dispersing a graphite raw material in a foaming agent aqueous solution to obtain a graphite pre-dispersion; and (2) grinding the graphite pre-dispersion, and then obtaining graphene by washing using water, and centrifugal fractionation. The foaming agent aqueous solution comprises the following components: sodium α-alkenyl sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, coconut oil diethanolamide, polyethylene glycol, and water. Graphite is used as a raw material, graphite is immersed in the foaming agent aqueous solution, and then ground, and the high-speed stirring effect of a grinding device drives the high-speed movement of a grinding medium to generate an impact, friction and shear force on the graphite. The foaming agent produces a large amount of stable and fine foam in a closed grinding chamber, a large amount of foam can generate a pushing action, and supports the graphite, and a contact surface between the graphite and the grinding medium is increased, thereby achieving a good exfoliation effect.
Provided are an electrolytic solution for a lithium-sulfur battery, and a preparation method therefor and an application thereof. The electrolytic solution comprises the following components: an organic solvent, an electrolyte, and an additive. The organic solvent is prepared from 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and 1,3-dioxolane; the electrolyte is prepared from bis(hexafluoroethane)sulfonamide lithium salt and LiCF3SO3; the additive is sulfide of lithium, and the sulfide of lithium is Li6S2. According to the method, an electrolytic solution is recycled from a lithium-sulfur battery, and an Li element in the electrolytic solution is extracted and used for cyclically preparing the electrolytic solution for the lithium-sulfur battery; in addition, organic matters in the electrolytic solution of the waste lithium-sulfur battery can be enriched, thereby facilitating centralized treatment, and reducing leakage pollution.
Provided are a preparation method for and the use of a lithium iron phosphate positive electrode material, comprising the following steps: (1) dry mixing and refining an iron source, a phosphorus source, a lithium source, a carbon source and an additive to obtain a mixed material; (2) sintering the mixed material for a first time, and then crushing, to obtain a crushed material; and (3) sintering the crushed material for a second time, during which a gasifiable organic carbon source is introduced, and then cooling, to obtain the lithium iron phosphate positive electrode material. Using a high-efficiency material mixing device to perform one-step mixing refinement of raw materials, sintering and crushing, then performing secondary sintering and supplemental carbon coating using a gasifiable organic carbon source, to enable same to have a better carbon coating layer and particle morphology. The obtained product has a better performance, and compared with the same type of products on the market, the product has greatly improved performance, good circulation stability, and can satisfy the general requirements of a high-performance lithium iron phosphate battery.
C01B 25/45 - Phosphates containing plural metal, or metal and ammonium
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
63.
PREPARATION METHOD FOR NANO LITHIUM COBALT OXIDE POSITIVE ELECTRODE MATERIAL AND USE THEREOF
3343433 being simple and easy to control, the process being short, particularly fine temperature control not being needed, and conditions such as the pH value also not needing to be accurately controlled during the reaction process. The present invention is suitable for large-scale industrial production.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
64.
METHOD FOR RECOVERING WASTE LITHIUM BATTERY POSITIVE ELECTRODE MATERIAL
The present invention belongs to the field of the recovery of lithium ion batteries. Disclosed is a method for recovering a waste lithium battery positive electrode material. The method comprises the following steps: (1) carrying out acid leaching on a waste lithium battery positive electrode material, so as to obtain a leachate; (2) adding iron powder to the leachate for reduction, so as to obtain sponge copper and a post-copper-removal liquid; (3) heating the post-copper-removal liquid, then adding a waste battery positive electrode powder, mixing same, carrying out a reaction, regulating the pH to be acidic, and filtering same to obtain an iron-aluminum residue and a filtrate; and (4) carrying out extraction on the filtrate to obtain a nickel cobalt manganese sulfate solution and a raffinate, carrying out coprecipitation on the nickel cobalt manganese sulfate solution to obtain a ternary precursor, adding an alkali liquor to the raffinate, and filtering same to obtain lithium carbonate. In the method for recovering a waste lithium battery positive electrode material provided in the present invention, ferrous ions in the post-copper-removal liquid are used as a reducing agent to leach out lithium manganate, lithium cobalt oxide, and the metal elements nickel, cobalt and manganese from a ternary battery positive electrode plate powder, so that lithium is efficiently recovered therefrom.
A ternary single crystal positive electrode material, a preparation method therefor and an application thereof. The preparation method comprises the following steps: mixing ternary polycrystalline micro-powder, heating, carrying out first sintering, and cooling to obtain an intermediate; carrying out air jet pulverization on the intermediate to obtain a single crystal material, washing with water, and centrifuging and drying to obtain a material of which the residual alkali content is lower than 1500 ppm; and adding a coating agent into the material, heating, carrying out second sintering, and cooling to obtain the ternary single crystal positive electrode material. Polycrystalline materials are pulverized into single crystal small particles by utilizing an air jet pulverization device, such that the electrochemical performance of the materials is improved, and the energy density of the materials is improved.
C30B 1/10 - Single-crystal growth directly from the solid state by solid state reactions or multi-phase diffusion
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
66.
METHOD FOR RECYCLING GOLD FROM FULL-MUD CYANIDE TAILINGS
The present invention relates to the field of hydrometallurgy. Disclosed is a method for recycling gold from full-mud cyanide tailings, comprising the following steps: (1) performing pulping and screening on cyanide tailings to obtain a coarse grained gold-loaded carbon and ore pulp; (2) performing pulp adjustment on the ore pulp, adding a chemical for stirring, and then performing floatation circulation to obtain gold-loaded carbon powder and tailing slag; (3) dehydrating the gold-loaded carbon powder, and then incinerating same together with the coarse grained gold-loaded carbon in step (1) to obtain carbon residues and fallen ash; and (4) smelting the carbon residues to obtain a gold ingot. The chemical is at least one of terpineol oil or diesel. The method for recycling gold from full-mud cyanide tailings of the present invention has short process, is low in cost, recycles gold in tailings to a great extent, and decreases the grade of the gold in the tailings.
A battery cell electrode grinding device, comprising a feeding mechanism (100), a conveying and clamping mechanism (200), and a grinding mechanism (300). The feeding mechanism (100) comprises an inclined slideway (160) and a first pressing device (110); the tail end of the inclined slideway (160) is provided with movable shift levers (120); the conveying and clamping mechanism (200) comprises a conveyor belt (250); a sensor (210) and a pushing device (220) are sequentially provided at one side of the conveyor belt (250), and a second pressing device (240) is provided above the other side of the conveyor belt (250); the grinding mechanism (300) is located at the other side of the conveyor belt (250), and comprises a raising/lowering platform (360); a first platform (310) is provided on the raising/lowering platform (360); a second platform (320) is provided on the first platform (310); and a grinding tool (330) is provided on the second platform (320). The battery cell electrode grinding device can realize full-automatic grinding of a cell electrode, achieve the purpose of simulating manual repeated grinding actions, reduce the loss of the grinding tool, and lower use costs.
B24B 19/00 - Single purpose machines or devices for particular grinding operations not covered by any other main group
B24B 5/313 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving work-supporting means carrying several workpieces to be operated on in succession
68.
METHOD FOR PURIFYING NICKEL-COBALT-MANGANESE LEACHING SOLUTION
The present invention belongs to the field of hydrometallurgy. Disclosed is a method for purifying a nickel-cobalt-manganese leaching solution. The method comprises the following steps: heating a nickel-cobalt-manganese leaching solution, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain iron-aluminum slag and a liquid with iron and aluminum removed therefrom; heating the liquid with iron and aluminum removed therefrom, adding a manganese powder thereto, adjusting the pH, reacting same, and filtering same to obtain copper slag and a solution with copper removed therefrom; heating the solution with copper removed therefrom, adding an alkaline solution thereto, adjusting the pH, reacting same, and filtering same to obtain a nickel-cobalt-precipitated solution and nickel-cobalt-manganese hydroxide; and adding water into nickel-cobalt-manganese hydroxide for slurrying, heating same, adding an acidic solution for dissolution, adjusting the pH, reacting same, heating same, adding a manganese powder thereto, adjusting the pH, and filtering same to obtain iron-aluminum slag and a nickel-cobalt-manganese sulfate solution which is up to standard. According to the present invention, firstly, ferrous iron in the solution system is oxidized using a manganese oxide ore, the pH value thereof is adjusted with a manganese carbonate ore by means of neutralization, iron and aluminum are removed, residual acid in the solution system is consumed, and manganese carbonate ore is also leached out for producing manganese sulfate.
The present invention relates to a method for recycling iron and aluminum in a nickel-cobalt-manganese solution. The method comprises the following steps: leaching a battery powder and removing copper therefrom to obtain a copper-removed solution, and adjusting the pH value in stages to remove iron and aluminum, so as to obtain a goethite slag and an iron-aluminum slag separately; mixing the iron-aluminum slag with an alkali liquor, and heating and stirring same to obtain an aluminum-containing solution and alkaline slag; and heating and stirring the aluminum-containing solution, introducing carbon dioxide thereto and controlling the pH value to obtain aluminum hydroxide and an aluminum-removed solution. According to the method of an embodiment of the present invention, iron and aluminum in the solution can be effectively removed, and at the same time, the iron and aluminum are recycled, the resource recycling rate can be effectively increased, the process is reasonable, the cost is low, the environmental pollution is small, generated by-products can be returned to the process flow, no hazardous waste residues are discharged into a process system of the present invention, and the method has good economic benefits and social benefits.
H01M 10/54 - Reclaiming serviceable parts of waste accumulators
C01D 7/00 - Carbonates of sodium, potassium, or alkali metals in general
C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
Disclosed is a method for producing a battery-grade nickel sulfate by means of laterite nickel ore. The method comprises the following steps: a laterite nickel ore is sorted to obtain a lump ore and a mud and sand ore; the lump ore is crushed, and is then subjected to a dump leaching treatment to obtain a crude nickel sulfate solution A; the mud and sand ore is separated to obtain a high-chromium ore, a low-iron and high-magnesium ore, and a high-iron and low-magnesium ore, and the low-iron and high-magnesium ore is dried, calcined, reduced and sulfurated to obtain a low nickel matte; the low nickel matte is subjected to blowing, water extraction and then oxygen pressure leaching to obtain a crude nickel sulfate solution B; the high-iron and low-magnesium ore is subjected to pressure leaching to obtain a crude nickel sulfate solution C; and the crude nickel sulfate solutions A, B and C are extracted, and then subjected to evaporative crystallization so as to obtain a battery-grade nickel sulfate. In the present invention, the advantages of the RKEF process, the pressure leaching process and the dump leaching process are fully utilized, and are integrated together to complement one another. The characteristics of different ores are utilized, proper processes are used for treatment, the production cost is low, and the comprehensive recovery rate of nickel and cobalt is 90% or above.
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
The present invention belongs to the field of hydrometallurgy. Disclosed is a method for recovering lithium from lithium-containing wastewater. The method comprises the following steps: (1) adjusting the pH of lithium-containing wastewater to be acidic or neutral; and (2) first formulating an organic phase, then saponifying same, adding the lithium-containing wastewater for extraction, and then separating the aqueous phase to obtain a loaded organic phase containing lithium ions, wherein a solution for adjusting the pH of the lithium-containing wastewater is sulfuric acid, and the organic phase comprises the following components: an extractant, a synergist and a diluent. In the combined extractant system of the present invention, ferric trichloride does not need to be added as a co-extraction agent, so that the phenomenon of emulsification caused by Fe3+ hydrolysis is avoided. The combined extractant system of the present invention has a good selectivity for lithium and sodium and a high loading amount; and after 4-stage countercurrent extraction, Li in the wastewater can be reduced from 3.7g/L to 0.126g/L, and the extraction rate can reach 96.6%.
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
72.
APPARATUS FOR AUTOMATICALLY DISASSEMBLING POWER BATTERY MODULE
An apparatus for automatically disassembling a power battery module, comprising a connecting frame (100), a first grabbing apparatus (200), a second grabbing apparatus (300), and a third grabbing apparatus (400). The first grabbing apparatus comprises a first hook group (210), a second hook group (220), a first driving assembly (230), and a second driving assembly (240); the first hook group and the second hook group are each provided with a plurality of hooks (221) which are symmetrically arranged and relatively move; the second grabbing apparatus comprises four locking members (310) movably arranged on the connecting frame, a third driving assembly (320), and a fourth driving assembly (330); the third driving assembly is used for driving the locking members to move transversely and longitudinally; each locking member comprises a sleeve (340) and a pull rod (350) movably connected to the interior of the sleeve (340); the fourth driving assembly is used for driving the pull rod to move; the end portion of the pull rod is provided with a fixed portion (360); the end of the sleeve abutting against the fixed portion is provided with a plurality of movable plates (370) having resilience; and the third grabbing apparatus comprises a sucker (410) mounted on the connecting frame. The first, second and third grabbing apparatuses can be used for disassembling power battery modules having different structures, different shapes and different sizes, thus replacing conventional manual operations and reducing manpower losses.
B25B 27/02 - Hand tools or bench devices, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
H01M 10/04 - Construction or manufacture in general
Provided are a pre-lithiated lithium ion positive electrode material, a preparation method therefor and the use thereof. The chemical formula of the lithium ion positive electrode material is Li2O/[A(3-x)Mex]1/3-LiAO2, wherein A includes M, and M is at least one of Ni, Co and Mn; Me is at least one of Ni, Mn, Al, Mg, Ti, Zr, Y, Mo, W, Na, Ce, Cr, Zn or Fe; and 0 < x < 0.1. Co-doping with various elements is used, and these elements act synergistically to inhibit an irreversible phase change at a high voltage and improve the stability of the structure of a substrate. The structure of the spinel phase A(3-x)MexO4 contains doping elements, thereby improving the interfacial activity of the material by means of a combined action and introducing more electrochemically active sites.
patents
