Method of processing sulphide gold containing concentrates and ores

FIELD: technological processes.

SUBSTANCE: invention relates to method of processing sulphide gold containing arsenic concentrates. Method involves mixing, annealing, treatment of gas phase and cinder leaching with extraction of gold, silver, nonferrous and rare metals. Batch is prepared by mixing concentrate with ammonium chloride in weight ratio of 1:0.3–1:3.0. Coal is added to batch in weight ratio of 1:0.01–1:0.1 and annealed at temperature not higher than 300 °C to produce mixture of sublimates in gas-phase, FeCl2+FeCl3, which are subjected to recovery of iron in high-purity metal form at temperature of 550–650 °C. Technical result is significant increase of amount of extracted gold, silver, iron with purity of 99.99 %, nonferrous and noble metals.

EFFECT: increased number of extracted gold, silver, iron, nonferrous and noble metals; wherein significant environmental effect is achieved due to complete recultivation of sludge concentrate and all accompanying wastes.

1 cl, 1 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a method of processing silver-containing concentrates. Oxidation-chlorination roasting is carried out with the application of chlorides of alkali metals with obtaining a chloride cinder, further leaching of the chloride cinder and separation of a cake from the solution. The cake of autoclave leaching of silver-containing concentrates, with the application as such of copper sulphide silver-containing concentrates, is subjected to oxidation-chlorination roasting. Leaching of the chloride cinder is performed in water with obtaining a chloride solution and a cake of water leaching. The obtained chloride solution is processed with sodium sulphide and calcium chloride with the separation of residues of copper sulphide and calcium sulphate dehydrate. A water solution of alkali metal chloride is evaporated to saturation and directed to oxidation-chlorination roasting. The cake of water leaching is leached in a sodium thiosuphfate solution. The obtained productive solution is processed with sodium sulphide, the silver-containing sediment of sulphides is separated from the regenerated sodium thiosulphate solution, and the regenerated solution is directed to a stage of leaching the cake of water leaching, with the sediment of sulphides being processed with obtaining silver.

EFFECT: reduction of expenditures and increase of silver extraction.

4 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to procedure for processing sulphide gold-containing arsenic-antimonous concentrates or ores and can be implemented at extraction of gold and antimony from poly-metallic sulphide concentrates and ores, mainly with ingrained fine dispersed gold. The procedure consists in preparation of charge out of concentrates or ores with halogenide, in charge roast, in extraction of gaseous compounds, in their condensation, in production gold containing ash, and in leaching gold out of it. Charge is prepared out of concentrate or ore and ammonia chloride and/or fluoride at weight ratio 10:0.3-3.0. Charge is roasted in continuous flow of non-corrosive gas and there is produced gold containing pyrrhotine ash. Pyrrhotine ash is subjected to sorptive cyaniding to leach gold; gaseous compounds in form of gaseous antimony sulphide and arsenic poly-sulphides extracted during roasting are subjected to fraction condensation.

EFFECT: intensified extraction of gold from concentrate or ore by raised degree of sulphide minerals opening, reduced production expenditures for gold extraction, and reduced anthropogenic influence to ecological system.

3 cl, 1 tbl, 2 ex

FIELD: metallurgy.

SUBSTANCE: treatment method of silicon-containing alloys of platinum and noble metals includes treatment by chlorine and separation of formed solid and liquid phases by filtration. Treatment by chlorine is implemented at temperature 300-850°C with formation of liquid phase in the form of liquid silicon tetrachloride and solid phase of powder of platinum and noble metals in elementary state. Solid phase after filtration is washed and there are extracted platinum and noble metals.

EFFECT: simplification of process at total extraction of platinum metals, silver and gold from silicon-containing alloy.

1 ex

FIELD: metallurgy industry.

SUBSTANCE: as per the first version, the method involves activation of fine carbon base with laminate-type structure by being intercalated in water solutions of strong acids and further interaction of intercalated base with hexachloroplatinum acid by introducing it, reduction of interacting products till platinum is obtained and oxidation of carbon base. As per the second version, the method involves interaction of fine carbon base with hexachloroplatinum acid in the presence of chloride, reduction of interacting products till platinum is obtained and oxidation of carbon base.

EFFECT: simplifying manufacture and increasing economy of the process.

2 cl, 1 dwg, 3 ex

The invention relates to metallurgy, namely to receive the platinum group metals gas-phase method

FIELD: metallurgy industry.

SUBSTANCE: as per the first version, the method involves activation of fine carbon base with laminate-type structure by being intercalated in water solutions of strong acids and further interaction of intercalated base with hexachloroplatinum acid by introducing it, reduction of interacting products till platinum is obtained and oxidation of carbon base. As per the second version, the method involves interaction of fine carbon base with hexachloroplatinum acid in the presence of chloride, reduction of interacting products till platinum is obtained and oxidation of carbon base.

EFFECT: simplifying manufacture and increasing economy of the process.

2 cl, 1 dwg, 3 ex

FIELD: metallurgy.

SUBSTANCE: treatment method of silicon-containing alloys of platinum and noble metals includes treatment by chlorine and separation of formed solid and liquid phases by filtration. Treatment by chlorine is implemented at temperature 300-850°C with formation of liquid phase in the form of liquid silicon tetrachloride and solid phase of powder of platinum and noble metals in elementary state. Solid phase after filtration is washed and there are extracted platinum and noble metals.

EFFECT: simplification of process at total extraction of platinum metals, silver and gold from silicon-containing alloy.

1 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to procedure for processing sulphide gold-containing arsenic-antimonous concentrates or ores and can be implemented at extraction of gold and antimony from poly-metallic sulphide concentrates and ores, mainly with ingrained fine dispersed gold. The procedure consists in preparation of charge out of concentrates or ores with halogenide, in charge roast, in extraction of gaseous compounds, in their condensation, in production gold containing ash, and in leaching gold out of it. Charge is prepared out of concentrate or ore and ammonia chloride and/or fluoride at weight ratio 10:0.3-3.0. Charge is roasted in continuous flow of non-corrosive gas and there is produced gold containing pyrrhotine ash. Pyrrhotine ash is subjected to sorptive cyaniding to leach gold; gaseous compounds in form of gaseous antimony sulphide and arsenic poly-sulphides extracted during roasting are subjected to fraction condensation.

EFFECT: intensified extraction of gold from concentrate or ore by raised degree of sulphide minerals opening, reduced production expenditures for gold extraction, and reduced anthropogenic influence to ecological system.

3 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of processing silver-containing concentrates. Oxidation-chlorination roasting is carried out with the application of chlorides of alkali metals with obtaining a chloride cinder, further leaching of the chloride cinder and separation of a cake from the solution. The cake of autoclave leaching of silver-containing concentrates, with the application as such of copper sulphide silver-containing concentrates, is subjected to oxidation-chlorination roasting. Leaching of the chloride cinder is performed in water with obtaining a chloride solution and a cake of water leaching. The obtained chloride solution is processed with sodium sulphide and calcium chloride with the separation of residues of copper sulphide and calcium sulphate dehydrate. A water solution of alkali metal chloride is evaporated to saturation and directed to oxidation-chlorination roasting. The cake of water leaching is leached in a sodium thiosuphfate solution. The obtained productive solution is processed with sodium sulphide, the silver-containing sediment of sulphides is separated from the regenerated sodium thiosulphate solution, and the regenerated solution is directed to a stage of leaching the cake of water leaching, with the sediment of sulphides being processed with obtaining silver.

EFFECT: reduction of expenditures and increase of silver extraction.

4 tbl, 1 ex

FIELD: technological processes.

SUBSTANCE: invention relates to method of processing sulphide gold containing arsenic concentrates. Method involves mixing, annealing, treatment of gas phase and cinder leaching with extraction of gold, silver, nonferrous and rare metals. Batch is prepared by mixing concentrate with ammonium chloride in weight ratio of 1:0.3–1:3.0. Coal is added to batch in weight ratio of 1:0.01–1:0.1 and annealed at temperature not higher than 300 °C to produce mixture of sublimates in gas-phase, FeCl2+FeCl3, which are subjected to recovery of iron in high-purity metal form at temperature of 550–650 °C. Technical result is significant increase of amount of extracted gold, silver, iron with purity of 99.99 %, nonferrous and noble metals.

EFFECT: increased number of extracted gold, silver, iron, nonferrous and noble metals; wherein significant environmental effect is achieved due to complete recultivation of sludge concentrate and all accompanying wastes.

1 cl, 1 ex

FIELD: metallurgy.

SUBSTANCE: method includes heat treatment of industrial product with ammonium chloride followed by isolation of non-ferrous, rare, platinum and noble metals. In addition, the natural mineral pyrolusite is additionally introduced into the charge. The heat treatment for reducing loss of metals with sublimates is carried out at temperature not higher than 320°C for 30-180 min followed by hydrochloric acid leaching and isolation of metals from solution.

EFFECT: reduced losses of extracted metals.

1 tbl, 2 ex

FIELD: metallurgy.

SUBSTANCE: method for processing sulfide gold-containing arsenic-containing materials in the form of concentrates or ores includes charging, burning, treatment of gas phase, leaching of cinder with extraction of gold, non-ferrous and rare metals. The charge is prepared by mixing ore and/or concentrate with ammonium chloride at weight ratio 1:0.3-1:3.0, additionally, coal is introduced into the prepared batch at a weight ratio of 1:0.01-1:0.1 and subjected to annealing in furnace with a vibration-boiling layer formed by wide-band ultrasonic whips at a temperature not higher than 300°C with production in gas phase and subsequent isolation of mixture of sublimates FeCl2 FeCl3. The remaining cinder is subjected to aqueous leaching of soluble chlorides of non-ferrous and rare metals. Then gold is extracted from cake on centrifugal concentrators.

EFFECT: increased extraction efficiency of gold and valuable components.

2 ex

FIELD: chemistry.

SUBSTANCE: raw material is dried to a moisture content of 6 wt %, mixed with a solution of calcium chloride with a concentration of 35-40 wt %, after which it is ground. The washing solution after cooling flue gas is fed into the thickener for thickening to produce a filtrate and a cake. A gold sludge with an iron powder and a substituted filtrate, from which sponge copper is produced, are produced from the filtrate. Using hot flue gas, a solution of calcium chloride with a concentration of 35-40 wt % is produced. Gold from the gold sludge is extracted by two chlorination operations and two recovery operations to produce sponge gold, from which the gold ingot is produced. When gold is extracted by chlorination, a gold extraction solution and a cake are produced. The solution is fed to the primary reduction of the gold chlorination sludge. From the cake, silver is recovered, after reduction with hydrazine hydrate, a silver powder is produced, from which a silver ingot is produced.

EFFECT: reagent consumption, the cost price decrease, the degree of complex extraction of valuable metals increases, the level of environmental pollution decreases.

12 cl, 1 dwg, 2 ex

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