METHOD OF EXTRACTING NOBLE METALS FROM ORES AND CONCENTRATES Russian patent published in 2019 - IPC C22B11/00 C22B3/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydrometallurgy of noble metals. Preparation of water solution of reagent for leaching is carried out by saturation of aqueous solution of reagent with electrolysis gases during electrolysis with subsequent transfer of electrolysis gases into reaction-active form by ultraviolet irradiation and dispersion by ultrasonic action for not less than 10 minutes. Then, obtained solution of reagent is introduced into mineral mass to obtain pulp when T:G is reached of not less than 2:1, which is agitated for at least 4 hours, followed by separation of solid phase, which is treated with solution of chlorine-containing reagent in ratio T:G of not less than 2:1, which is pre-activated with ultraviolet radiation and ultrasonic action. Produced pulp is subjected to agitation for not less than 4 hours with subsequent ultrasonic exposure for not less than 10 minutes and drain of productive solution.

EFFECT: high efficiency due to intensification of oxidation containing disperse gold and other noble metals of mineral matrix and breaking bonds of cluster inclusions of these metals with surrounding matrix atoms by two-step treatment of pulp.

1 cl, 1 dwg, 1 ex