从湿法炼锌净液渣中回收铜的新工艺研究

摘要

研究了以湿法炼锌净液渣生产阴极铜，考察了稀硫酸浸出锌、氧化浸出铜、不溶阳极电沉积工艺条件。试验结果表明：在适宜条件下，锌浸出率达98．69％，镉浸出率96．15％，钴浸出率达70．70％；进入电积系统的铜的直收率为80．69％，电积过程铜回收率为99．68％，铜总回收率大于99％；阴极铜质量达到国家1＃阴极铜（GB／T 467—2010）标准。%T he process for production of cathode copper using zinc hydrometallurgy purification residue was studied .The technological conditions of leaching zinc with dilute sulfuric acid ,oxidation leaching of copper and insoluble anode electrowinning copper were investigated .The experimental results show that the leaching rate of zinc ,cadmium and cobalt are 98 .69% ,96 .15% and 70 .70% ,respectively under the optimum conditions .The direct recovery rate of copper in electrowinning system is 80 .69% , the recovery rate of copper in electrowinning process is 99 .68% ,and the total recovery rate of copper is over 99% .Cathode copper quality meets the national standard(GB/T467—2010) .