PROCEDURE FOR PROCESSING GOLD-ANTIMONIAL CONCENTRATES Russian patent published in 2011 - IPC C22B30/02 C22B11/00 C22B3/06 

FIELD: metallurgy.

SUBSTANCE: procedure consists in concentrate stage leaching with conversion of antimony into solution at first stage and conversion of gold into solution at second stage. At the first stage leaching is performed with solution containing sulphuric acid and sodium chloride at presence of compounds of manganese at oxidation degree not below 3 or with solution of active chlorine in hydrochloric acid solution; further, obtained productive solution of antimony chloride is directed for antimony extraction by cementation, hydrolysis and electric settling. At the second stage cake of the first stage is leached with solution containing HCl and compounds of manganese at degree of oxidation not below 3 in form of salts of manganic acid or manganese minerals, or solution of HCl with active chlorine, which is followed with extraction of gold from solution. Upon extraction of gold and antimony solutions are re-generated with extracting compounds of manganese by means of chemical compounds and are returned to leaching.

EFFECT: increased selective extraction of gold and antimony and reduced expenditures.

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