Tianjin electrolytic copper plant for which the anode slime containing lead and tin of high using smelt combined process, about 2% Au and 3.5% Ag into the flotation tailings, and later by test, the recovery of tin in form of tin-lead solder , then the recovery of gold and silver, wherein the solder from the electrolytic anode. The metal recovery rates were: PbZ>91%, Sn>88%, and both Au and Ag were 99%, which greatly improved the recovery rate of Au and Ag.
The Zhongyuan Smelter uses a sulphation roasting-cyanide leaching process to perform acid leaching prior to cyanidation leaching, salt leaching to remove cyanide leaching of Cu, Pb, and Zn, followed by cyanidation and leaching of gold. Changsha Nonferrous Metallurgy Design and Research Institute, through the analysis of copper anode mud, it is known that copper anode mud usually contains 20% to 30% of copper, which is mainly caused by entrained copper sulfate electrolyte. Therefore, it is proposed to pretreat with warm water with sulfuric acid. Not only can you leach most of the copper, but you can also leach a part of the crucible to reduce the copper content of the anode mud to 3% to 6%. Fuchunjiang Smelter wants to cancel the gold and silver electrolysis, and tested the process of TBP-n-octanol extraction of gold-oxalic acid to reduce the stripping gold, so that the purity of gold is greatly improved.
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