METHOD OF ISOLATION OF PRECIOUS METALS FROM ORES Russian patent published in 1997 - IPC

FIELD: precious metals production. SUBSTANCE: invention deals with isolating precious metals from carbonate mineral-containing ores by means of saturation of return bicarbonate-containing leaching solution with chlorine and using thus prepared solution to treat ores. According to invention, amount of chlorine taken for saturating return solution should be sufficient to convert bicarbonate ions into carbonic acid. EFFECT: optimized process conditions. 1 tbl