METHOD FOR COMPLEX PROCESSING OF MATERIAL CONTAINING PRECIOUS METALS Russian patent published in 2016 - IPC C22B3/06 C22B11/00 C22B15/00 C22B25/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy of noble metals including gold and it can be used in metasomatosis of a low-grade, and high-grade primary and secondary raw material to produce highly concentrated products at each stage of leaching. Substance of the method is stepwise conversion of different metals into the solution. Proposed method comprises sulfuric acid leaching with further acid oxidative leaching in presence of ammonium nitrate with subsequent conversion of gold into the solution by acid chlorination in the presence of diluted sulfuric acid, ammonium nitrate and table salt. Then production of gold and metals from the solutions is performed.

EFFECT: method enables to perform parting without taking into account the initial composition of processed material containing precious metals, with successive conversion them into the solution; It ensures decrease of production costs and environmental load, increase of efficiency of extracting of the end product.

1 cl, 1 dwg