METHOD FOR HEAP LEACHING OF GOLD FROM MINERAL RAW MATERIAL Russian patent published in 2017 - IPC C22B11/00 C22B3/04 

FIELD: technological processes; chemistry.

SUBSTANCE: invention is intended for heap leaching of gold from mineral raw material. Photoelectro-activated peroxide-carbonate and/or peroxide-hydroxide solution is used for pelletizing raw materials. Then mineral mass is stacked, followed by a pause and irrigated until its complete wetting with two types of active solutions – with oxidizers and complexing agent for gold, followed by a second pause. After diffusion leaching of gold, stack is irrigated with a solution of complexing agent, prepared based on activated water and/or gold-free mother solution passing through electrochemical and/or photoelectrochemical treatment, which directly before feeding for irrigation of stacks is mixed with highly concentrated peroxide-carbonate and/or peroxide-hydroxide solution.

EFFECT: higher efficiency of processing technogenic mineral raw material due to more complete opening of mineral matrices.

1 cl, 3 tbl, 1 ex