FIELD: metallurgy.
SUBSTANCE: procedure consists in raw stock fine crumbling, in autoclave oxidising leaching under pressure of oxygen, and in cake cyaniding with extraction of gold into cyanic solution. Also, autoclave oxidising leaching is performed at temperature 125-150°C. Upon leaching cake containing elementary sulphur is brought to pulp with water. Alcali agent is added into pulp and sulphur is autoclave oxidised at its dissolving and oxidation to a sulphate state. Cake is subjected to cyaniding after autoclave oxidation of sulphur.
EFFECT: increased extraction of gold into cyanic solution.
4 cl, 2 dwg
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