METHOD OF PROCESSING SULPHIDE GOLD CONTAINING CONCENTRATES AND ORES Russian patent published in 2017 - IPC C22B11/06 

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