FIELD: metallurgy of precious metals.
SUBSTANCE: invention is related to processing of gold-bearing concentrates of double hardness. The method for processing sulfide gold-bearing concentrates includes acid treatment of the concentrate, thickening, feeding the thickened pulp into the autoclave, autoclave oxidation of the concentrate under oxygen pressure, cooling the leached pulp by self-evaporation, conditioning the autoclave pulp, its dehydration and washing, and further extraction of gold by sorption cyanidation of the autoclave residue. At the same time, a sodium dichromate solution with a concentration of 2.0 to 2.2 kg/L and a flow rate of 143 to 200 liters per 1 ton of the initial gold-bearing concentrate is fed into the autoclave pulp, and autoclave oxidation is carried out at a temperature of 210 to 250°C.
EFFECT: increase of degree of extraction of gold from gold-bearing concentrates of double refractoriness.
1 cl, 6 tbl
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