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Effecting by copper ions, the rate of directly leaching refractory gold ores would be low, and a great deal of cyanide is consumed, thus the treatment is uneconomical.Using chemical pre-oxidation leaching refractory gold ores can cut leaching costs, reduce environmental pollution and improve the recovery.In this paper, floatation gold concentrate has been studied.This type gold concentrate contains pyrite, pyrrhotite and chalcopyrite.