NOUFERROUS METALLURGICAL EQUIPMENT

The smelting slag produced by pyrometallurgy of copper concentrate is recovered by flotation, and the tailings contain Pb, Zn and Sb, which still have certain economic value for recovery. Comparative pilot tests were conducted on three typical pyrometallurgical recovery processes: direct reduction smelting, matte reduction smelting, and oxidation-reduction smelting.The results show the pyrometallurgical recovery process can achieve an ideal copper recovery rate, but different processes have different recovery effects on Pb, Zn and Sb; direct reduction smelting has improved the recovery rate of Pb; matte reduction smelting has improved the recovery rate of Zn; the smelting method requires a large amount of reducing agents and energy, and the economy needs to be carefully considered. The pyrometallurgical process is suitable for research as a backup process for copper recovery.