EXTRACTION METHOD OF METALS FROM METAL-CONTAINING MINERAL RAW MATERIAL Russian patent published in 2013 - IPC C22B3/04 C22B11/00 E21B43/28 

FIELD: metallurgy.

SUBSTANCE: method involves crushing of raw material, its heaping in the form of a pile, pre-treatment of raw material in the pile, treatment of the pile with a leaching solution, dilution of metals and obtaining of productive solution with removal of metals from it. At that, pre-treatment is performed by supplying separate solutions or mixture of solutions containing surface active substance and hypochlorite to the pile. Treatment with the leaching solution is performed by means of the solution obtained by mixing in the pile volume at supply to it of separate solutions or mixture of solutions containing hypochlorite, surface-active substance and/or mineral acid. In the leaching solution there used are mixtures of mineral acids or in-series introduced mineral acids. Supply points of the above solutions to the pile can be different.

EFFECT: increasing the efficiency of the process cycle at reduction of costs and emission of hazardous gases.

5 cl, 9 tbl, 6 ex