The present disclosure is directed to a gold recovery process in which activated carbon or another carbon-based material is used to accelerate thiosulfate leaching of gold from a gold-bearing material.
The present disclosure is directed to a thiosulfate leaching process for precious metal recovery. In the process, a precious metal is leached from a precious metal-bearing material by contacting the precious metal-bearing material with a particulate carbon-based material, a thiosulfate, an anion exchange resin and an oxidant to form a slurry comprising the leached precious metal. The particulate carbon-based materials serves as a catalyst for dissolution rates and precious metal recoveries during the leaching.
The present disclosure is directed to a thiosulfate leaching process for precious metal recovery. In the process, a precious metal is leached from a precious metal-bearing material by contacting the precious metal-bearing material with a particulate carbon-based material, a thiosulfate, an anion exchange resin and an oxidant to form a slurry comprising the leached precious metal. The particulate carbon-based materials serves as a catalyst for dissolution rates and precious metal recoveries during the leaching.
The present disclosure is directed to a process for thiosulfate leaching of a precious metal-containing material and recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin optionally using an eluant comprising trithionate. Various process improvements include maintaining the thiosulfate-containing leach solution substantially free of thiols and amines, maintaining a concentration of a sulfide in the thiosulfate leach solution of no more than about 100 ppm, recycling the barren resin free of contact with a sulfide, bisulfide, and polysulfide, and/or maintaining a concentration of tetrathionates, trithionate s, sulfur-oxygen anions, and/or combinations thereof within about 50% of a concentration level of the one or more of tetrathionates, trithionates, sulfur-oxygen anions, the combinations thereof in the precious metal-containing solution before contact with the recycled barren resin.
The present disclosure is directed to a process for thiosulfate leaching of a precious metal-containing material and recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin optionally using an eluant comprising trithionate. Various process improvements include maintaining the thiosulfate-containing leach solution substantially free of thiols and amines, maintaining a concentration of a sulfide in the thiosulfate leach solution of no more than about 100 ppm, recycling the barren resin free of contact with a sulfide, bisulfide, and polysulfide, and/or maintaining a concentration of tetrathionates, trithionate s, sulfur-oxygen anions, and/or combinations thereof within about 50% of a concentration level of the one or more of tetrathionates, trithionates, sulfur-oxygen anions, the combinations thereof in the precious metal-containing solution before contact with the recycled barren resin.
The present disclosure is directed to a process for thiosulfate leaching of a precious metal-containing material and recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin optionally using an eluant comprising trithionate. Various process improvements include maintaining the thiosulfate-containing leach solution substantially free of thiols and amines, maintaining a concentration of a sulfide in the thiosulfate leach solution of no more than about 100 ppm, recycling the barren resin free of contact with a sulfide, bisulfide, and polysulfide, and/or maintaining a concentration of tetrathionates, trithionates, sulfur-oxygen anions, and/or combinations thereof within about 50% of a concentration level of the one or more of tetrathionates, trithionates, sulfur-oxygen anions, the combinations thereof in the precious metal-containing solution before contact with the recycled barren resin.
The present disclosure is directed to a gold recovery process in which activated carbon or another carbon-based material is used to accelerate thiosulfate leaching of gold from a gold-bearing material. In some embodiments, the gold recovery process comprises providing particulate activated carbon or another carbon-based material, providing a precious metal-bearing material, contacting the precious metal-bearing material with the particulate carbon-based material, thiosulfate, an anion exchange resin, and an oxidant to form a slurry comprising a slurried precious metal-bearing material, and leaching a precious metal from the slurried precious metal-bearing material.
The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.
06 - Common metals and ores; objects made of metal
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(Based on 44(e)) Common metals; wrought and unwrought common metals, alloys, ingots, common metal bars for further manufacture, intermetallic compounds in the nature of common metals, unwrought and semi-worked, for further manufacture; metal ores; common metal alloys and common metal alloys in cast, extruded or powder form; Copper, unwrought or semi-wrought (Based on 44(e)) Precious metals, wrought and unwrought precious metals, precious metal alloys, precious metal ingots, and precious metal bars for further manufacture; precious metal alloys; precious metal alloys in cast, extruded or powder form; gold and silver (Based on Use in Commerce) Extraction mining; mining extraction services; gold, silver or copper mining extraction; mining extraction for metals or metal ores; mining services in the nature of mining extraction services, building construction and construction of prospecting equipment in the nature of construction of tunnels and underground structures; construction, namely, construction of tunnels and underground structures; demolition and site clearance, namely, building demolition; installation, maintenance, repair and servicing of mining equipment and machinery (Based on Use in Commerce) Consulting services in the field of mining, namely, specialist consultancy, advisory and research services in the field of geophysical exploration and mining; Consulting services in the field of mining, namely, technological research and advisory services relating to mining, mining machinery and equipment and geological prospecting, specialist mining and prospecting services in this class; Mining exploration and mineral exploration services, namely, custom mine design and engineering in the field of mine exploration of precious and base metals; Construction engineering, namely, engineering services for the mining extraction construction industry
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Precious metals and their alloys; ornaments made of or coated with precious metals, gold, silver and platinum; jewellery; precious stones. Mining services including mining extraction services, building and construction of prospecting equipment; construction; construction engineering; demolition and site clearance; installation, maintenance, repair and servicing of mining equipment and machinery. Specialist consultancy, advisory and research services in the field of geophysical exploration and mining; technological research and advisory services relating to mining, mining machinery and equipment and geological prospecting, specialist mining and prospecting services in this class.
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Jewellery coated with precious metal alloys; jewellery; precious stones (1) Mining extraction services; Mining services for precious metals, building construction contracting services; building construction services; consulting services in the field of mining extraction; building construction; demolition and site clearance; installation, maintenance, repair and servicing of mining equipment and machinery
(2) Specialist consultancy, advisory and research services in the field of geophysical exploration and mining; technological research and advisory services relating to mining, mining machinery and equipment and geological prospecting, specialist mining and prospecting services; construction engineering
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(Based on 44(d) Priority Application) (Based on 44(e)) Precious metals and their alloys; precious stones (Based on 44(d) Priority Application) (Based on 44(e)) (Based on Use) Mining services, namely, mining extraction services; demolition of buildings and building structures; site clearance, namely, waste clean-up services; installation, maintenance, repair and servicing of mining equipment and machinery (Based on 44(d) Priority Application) (Based on 44(e)) (Based on Use) Specialist consultancy, advisory and research services in the field of geophysical exploration and mining; technological research and advisory services relating to mining, mining machinery and equipment and geological prospecting, specialist mining and prospecting services in this class; engineering in the field of construction
13.
Co-current and counter current resin-in-leach in gold leaching processes
A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.
C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Development of marketing strategies and marketing concepts for others in the fields of precious and base metals; direct marketing of the goods and services of others in the fields of precious and base metals; mine administration and management services; economical evaluations of precious and base metals
(2) Gold mining and the mining of silver, copper, precious metals and base metals; construction services for mines with respect to tunnels, above ground structures and below ground structures
(3) Mineral processing of precious and base metals
(4) Metallurgical testwork services for the purpose of recovering gold in situ; custom design of mines; engineering services in the field of mineral exploration; consulting services in the field of mineral exploration; engineering services for mines with respect to tunnels, above ground structures and below ground structures; geological, engineering, metallurgical evaluations of precious and base metals.
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Development of marketing strategies and marketing concepts for others in the fields of precious and base metals; direct marketing of the goods and services of others in the fields of precious and base metals; mine administration and management services; economical evaluations of precious and base metals
(2) Gold mining and the mining of silver, copper, precious metals and base metals; construction services for mines with respect to tunnels, above ground structures and below ground structures
(3) Mineral processing of precious and base metals
(4) Metallurgical testwork services for the purpose of recovering gold in situ; custom design of mines; engineering services in the field of mineral exploration; consulting services in the field of mineral exploration; engineering services for mines with respect to tunnels, above ground structures and below ground structures; geological, engineering, metallurgical evaluations of precious and base metals
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Gold mining extraction and mining of silver, copper and base metals. Mine design and engineering in the field of mine exploration of precious and base metals.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Gold mining extraction and mining extraction of silver, copper and base metals Custom mine design and engineering in the field of mine exploration of precious and base metals
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining extraction and mining of silver, copper and base metals.
(2) Mine design and engineering in the field of mine exploration of precious and base metals.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Gold mining extraction and mining of silver, copper and base metals. Mine design and engineering in the field of mine exploration of precious and base metals.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Gold mining extraction and mining extraction of silver, copper and base metals Custom mine design and engineering in the field of mine exploration of precious and base metals
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining extraction and mining of silver, copper and base metals.
(2) Mine design and engineering in the field of mine exploration of precious and base metals.
23.
Separation of copper minerals from pyrite using air-metabisulfite treatment
The present invention relates to flotation of sulfidic copper-molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted floatation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.
The disclosure relates to the oxidation and immobilization of trivalent arsenic from arsenic-containing solutions. The process includes oxidation of trivalent arsenic (As3+) species to the pentavalent state (As5+). A carbon additive (e.g., activated carbon) and oxygen are used to promote the arsenic oxidation processes. After oxidation of arsenic to the pentavalent state, the arsenic can be removed by precipitation to ferric arsenate or calcium arsenate or other arsenic containing compounds known in the art. The oxidation of arsenic can also occur simultaneously with the production and precipitation of ferric arsenate (e.g., scorodite). Ferrous iron can be oxidized to ferric iron in the presence of activated carbon and oxygen.
The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.
The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.
5+). A carbon additive (e.g., activated carbon) and oxygen are used to promote the arsenic oxidation processes. After oxidation of arsenic to the pentavalent state, the arsenic can be removed by precipitation to ferric arsenate or calcium arsenate or other arsenic containing compounds known in the art. The oxidation of arsenic can also occur simultaneously with the production and precipitation of ferric arsenate (e.g., scorodite). Ferrous iron can be oxidized to ferric iron in the presence of activated carbon and oxygen.
The disclosure relates to the oxidation and immobilization of trivalent arsenic from arsenic-containing solutions. The process includes oxidation of trivalent arsenic (As3+) species to the pentavalent state (As5+). A carbon additive (e.g., activated carbon) and oxygen are used to promote the arsenic oxidation processes. After oxidation of arsenic to the pentavalent state, the arsenic can be removed by precipitation to ferric arsenate or calcium arsenate or other arsenic containing compounds known in the art. The oxidation of arsenic can also occur simultaneously with the production and precipitation of ferric arsenate (e.g., scorodite). Ferrous iron can be oxidized to ferric iron in the presence of activated carbon and oxygen.
A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold. In an embodiment, the acid leaching forms a dissolved iron-containing leach slurry and the iron-containing leach slurry is contacted with a precious metal- and carbonate-containing material and thereafter precious metal is recovered from the precious metal- and carbonate-containing material.
A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold.
The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
34.
Co-current and counter current resin-in-leach in gold leaching processes
A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.
C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.
The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
A process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorted trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
38.
Co-current and counter current resin-in-leach in gold leaching processes
A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.
A method and system are provided in which a gold and/or silver-collecting resin-in-leach or resin-in-pulp circuit comprises both co-current and counter-current sections, specifically in thiosulfate leach systems.
A method and system are provided in which a gold and/or silver-collecting resin-in-leach or resin-in-pulp circuit comprises both co-current and counter-current sections, specifically in thiosulfate leach systems.
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
41.
CO-CURRENT AND COUNTER CURRENT RESIN-IN-LEACH IN GOLD LEACHING PROCESSES
A method and system are provided in which a gold and/or silver-collecting resin-in-leach or resin-in-pulp circuit comprises both co-current and counter-current sections, specifically in thiosulfate leach systems.
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/42 - Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
42.
ALKALINE AND ACID PRESSURE OXIDATION OF PRECIOUS METAL-CONTAINING MATERIALS
The present invention is directed to a precious metal recovery process comprising a method, said method comprising: receiving an aqueous leach solution comprising a leaching agent; passing the aqueous leach solution through a membrane filter to form an aqueous retentate comprising at least most of the leaching agent and an aqueous permeate comprising some of the leaching agent; recycling the aqueous retentate to a leaching step; destroying at least most of the leaching agent in the aqueous permeate to form an aqueous recycle stream substantially free of leaching agent; and recycling the aqueous recycle stream to a unit operation upstream of the leaching step.
The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.
The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.
The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(Based on Sections 1(a) and 44(e)) Gold mining extraction and mining of silver, copper and base metals (Based on Section 44(e)) Mine design and engineering in the field of mine exploration of precious and base metals
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining and the mining of silver, copper and base metals; mine design, engineering and consulting services in the field of mineral exploration; development, building and operation of a mine; evaluating, mining, processing and marketing of precious and base metals.
36 - Financial, insurance and real estate services
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining and the mining of silver, copper and base metals; mine design, engineering and consulting services in the field of mineral exploration; development, building and operation of a mine; evaluating, mining, processing and marketing of precious and base metals.
50.
Production of zinc sulphate concentrates from a dilute zinc sulphate solution
In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.
The present invention relates to flotation of sulfidic copper- molybdenum- and gold-containing minerals. More specifically, the invention relates to sulfoxy reagent-assisted flotation for separating of sulfides of copper, molybdenum and gold from pyrite, marcasite, pyrrhotite, arsenopyrite, and other gangue minerals following aerating by an oxidizing gas and contacting by a sulfoxy reagent. To promote collection and flotation the feed mineral materials are preferably not contacted with an externally generated non-oxidizing gas to lower the dissolved molecular oxygen content prior to flotation.
B03B 5/60 - Washing granular, powdered or lumpy materials; Wet separating by non-mechanical classifiers, e.g. slime tanks
B03B 5/64 - Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type of the free settling type
Embodiments of the present invention are directed to flotation of sulfidic materials following aerating by an oxidizing gas and contacting by a sulfoxy reagent.
Embodiments of the present invention are directed to flotation of sulfidic materials following aerating by an oxidizing gas and contacting by a sulfoxy reagent.
06 - Common metals and ores; objects made of metal
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
Goods & Services
Common metals; wrought and unwrought metals, alloys, ingots, metal bars, intermetallic compounds; metal ores; alloys and metal alloys in cast, extruded or powder form. Precious metals, wrought and unwrought precious metals, alloys, ingots, metal bars; precious metal alloys; precious metal alloys in cast, extruded or powder form; gold, silver, copper. Extraction mining; mining services; gold, silver or copper mining; mining for metals or metal ores.
06 - Common metals and ores; objects made of metal
14 - Precious metals and their alloys; jewelry; time-keeping instruments
37 - Construction and mining; installation and repair services
Goods & Services
Common metals; wrought and unwrought metals, alloys, ingots, metal bars, intermetallic compounds; metal ores; alloys and metal alloys in cast, extruded or powder form. Precious metals, wrought and unwrought precious metals, alloys, ingots, metal bars; precious metal alloys; precious metal alloys in cast, extruded or powder form; gold, silver, copper. Extraction mining; mining services; gold, silver or copper mining; mining for metals or metal ores.
56.
PROCESS FOR MERCURY CONTROL DURING PRESSURE OXIDATION
A method for pressure oxidation of a precious metal-bearing sulfide material is disclosed. The method minimizes dissolution of mercury within a pressure oxidation process. The method comprises providing a slurried feed comprises a refractory sulfied-containing material, precious metal , sulfides and at least one halogen; and oxidizing the sulfide- containing metal in such a way that the dissolution of mercury from the sulfide-containing material is inhibited.
The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold- bearing concentrates.
The present invention is directed to flotation of refractory gold sulfide ores in which the ore is ground, floated, the tailings reground, and refloated to produce gold-bearing concentrates.
The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.
The present invention is directed to flotation of refractory gold sulfide ores and to pressure oxidized residue neutralization using flotation tailings that have been contacted with an off gas of pressure oxidation.
A method for suppressing mercury dissolution during pressure oxidation of precious metal-containing materials in the presence of halogens and halides is provided. Pressure oxidation is performed under controlled oxidative conditions to maintain the mercury predominantly in the solid residue.
A method for recovering zinc ions by selective zinc sulfide precipitation from an aqueous solution comprising zinc ions and metal ions of a metal that precipitates as a metal sulfide at a pH lower than a pH at which zinc ions precipitate as a zinc sulfide.
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by hot curing of the autoclave discharge slurry followed by decomposition of argentojarosite using strong acid consumers.
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by hot curing of the autoclave discharge slurry followed by decomposition of argentojarosite using strong acid consumers.
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by hot curing of the autoclave discharge slurry followed by decomposition of argentojarosite using strong acid consumers.
A method for recovering zinc ions by selective sulfide precipitation from an aqueous solution comprising zinc ions and metal ions of a metal that precipitates as metal sulfide at a pH lower than a pH at which zinc ions precipitate as zinc sulfide, the method comprising contacting the aqueous solution with a source of sulfide to precipitate the metal ions as the metal sulfide while avoiding the precipitation of the zinc sulfide thereby yielding the metal sulfide precipitate and a solution comprising zinc ions, and contacting the solution comprising zinc ions with a source of sulfide ion in a concentration sufficient to precipitate the zinc ions as the zinc sulfide.
The present invention is directed to a precious metal recovery process in which basic ferric sulphates and/or jarosites are controlled by hot curing of the autoclave discharge slurry followed by decomposition of argentojarosite using strong acid consumers.
Precious metal recovery by thiosulfate leaching where thiosulfate lixiviant is generated in situ employing elemental sulfur generated from partial oxidation of sulfidic precious metal-bearing feed and/or employing reactants from processing effluent.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/46 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
69.
THIOSULFATE GENERATION IN SITU IN PRECIOUS METAL RECOVERY
Precious metal recovery by thiosulfate leaching where thiosulfate lixiviant is generated in situ employing elemental sulfur generated from partial oxidation of sulfidic precious metal-bearing feed and/or employing reactants from processing effluent.
C22B 3/04 - Extraction of metal compounds from ores or concentrates by wet processes by leaching
C22B 1/00 - Preliminary treatment of ores or scrap
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
Precious metal recovery by thiosulfate leaching where thiosulfate lixiviant is generated in situ employing elemental sulfur generated from partial oxidation of sulfidic precious metal-bearing feed and/or employing reactants from processing effluent.
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/12 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
71.
TREATMENT OF RECLAIM WATER FOR USE IN METALS RECOVERY
A process for improving the recovery of gold from gold-bearing solutions formed from carbonaceous ore using a cyanide lixiviant, the process comprising treatment of tailings pond water with H2SO5 before introduction into a gold-recovery system such that the water has a total concentration of CN- and SCN- reduced by at least 30%.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining and the mining of silver, copper and base metals; planning, designing, engineering and administrative services relating to the exploration, evaluation, development, mining, processing and marketing of precious and base metals.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Gold mining and the mining of silver, copper and base metals; planning, designing, engineering and administrative services relating to the exploration, evaluation, development, mining, processing and marketing of precious and base metals.
