铅阳极泥中有价金属的综合回收

采用盐酸浸出铅阳极泥富集金银,考察盐酸浓度、反应温度、液固比、反应时间对盐酸浸出过程中铜、锑、铋、金、银的影响。研究结果表明,浸盐酸浓度为3 mol/L、液固比为8∶1、反应温度为85℃、反应时间为4 h时,铜、锑、铋的浸出率分别为98%、99. 5%、99. 6%;浸出后的铅阳极泥与浸出前相比,金、银富集2倍以上。

Comprehensive Recovery of Valuable Metals from Lead Anode Slime

Lead anode slime was leached by hydrochloric acid to enrich Au and Ag,and effects of reaction concentration of hydrochloric acid,reaction temperature,reaction time,liquid-solid ratio on leaching rates of Cu,Pb,Sb,Bi during hydrochloric acid leaching process were inspected.The experimental results show that the leaching rates of Cu,Sb,Bi are 98%,99.5%,99.6%when hydrochloric acid concentration is 5.7 mol/L,reaction temperature 85℃,ration of liquid to solid 8:1,reaction time 4 h.Compared with not-leached lead anode slime,the content of Au and Ag in leached lead anode slime are enriched by more than 2 times.