Abstract:This paper introduces several pressure hydrometallurgical technologies for copper sulfide concentrates. For areas with few copper oxide ore, due to the higher final acid of one-stage oxygen pressure leaching, the acid reduction process in the subsequent process is complicated, and the copper loss in the residues is large. This process has certain limitations. Although the two-stage countercurrent oxygen pressure leaching can better solve the problem of acid reduction, the two-stage oxygen pressure leaching requires two autoclaves,which requires higher equipment investment and more complicated operations. A feed port is added in the middle section of the autoclave in the process of recovering electrowinning copper by synchronous leaching of copper sulfide concentrate with temperature-controlled oxygen pressure, and then two feed ports are fed with finely ground concentrate slurry. By controlling the different leaching temperatures of the front and rear compartments, it can achieve the purpose of leaching copper and removing iron and reducing acid at the same time,which saves equipment investment.