Alkaline leaching of refractory gold arsenosulphide concentrates

CIM Bulletin, Vol. 86, No. 971, 1993

S.N. Rossovsky, Moscow, Russia

A new method for the hydrometallurgical treatment of refractory gold arsenosulphide concentrates is presented. The method involves a combination of fine grinding, intensive agitation, flotation, and cyanidation, and consists of leaching of - lOp. pyrite and arsenopyrite particles in alkaline solution under intensive agitation without the application of costly high pressure and roasting techniques. Consistent extractions of gold, in excess of 96%, are achieved.
Mots Clés: Leaching, Refractory gold, Arsenosuphide concentrates.