Leaching of Gold and Silver from a Complex Sulfide Concentrate in Copper-Tartrate-Thiosulfate Solutions

The leaching behaviors of gold and silver from a complex sulfide concentrate in copper-tartrate-thiosulfate solutions were investigated this paper. Experimental parameters, including temperature, initial pulp pH, concentration copper, tartrate, thiosulfate, systematically studied. system exhibits promising performance dealing with the concentrate. Thiosulfate consumption could be greatly reduced due to in-situ generation thiosulfate derived sulfur or disulfide ions. Increasing temperature concentrations can promote leaching. A low tartrate content moderate increase copper accelerate leaching, but higher may depress extraction. suitable pH is critical for solutions. An extraction 74.50% Au 36.33% Ag was obtained direct concentrate, while percentages significantly increased up 82.60% 70.38%, respectively, when calcine following oxidative roasting pretreatment. recycling demonstrates that free great significance maintaining stability novel system. As an alternative traditional cyanide copper-ammonia-thiosulfate processes, provides environmentally friendly, nontoxic, relatively low-cost method ores concentrates.