Study on recovery process of valuable metals in zinc smelting slag
The recovery and utilization of valuable metals in zinc smelting slag are of great significance to the sus-tainable development of the metallurgical industry.In this study,a wet step leaching process,including acid leaching-alkaline leaching-cyanidation leaching,was used to recover zinc,lead,gold and silver with high contents of the above metals.The experimental results showed that under the conditions of sulfuric acid mass fraction of 20％,liquid-solid ratio of 2∶1,leaching temperature of 80 ℃.and leaching time of 2 h,the zinc leach-ing rate was 90.31％;under the conditions of sodium hydroxide mass fraction of 10％,liquid-solid ratio of 2∶1,leach-ing temperature of 80 ℃,and leach-ing time of 2 h,the lead leaching rate was 93.37％;under the conditions of sodium cyanide mass fraction of 0.20％,liquid-solid ratio of 2∶1,and leaching time of 16 h,the gold and silver leaching rates were 82.61％and 92.39％,respectively.The wet step leaching process realized the comprehensive recovery of the zinc smelting slag.
万方数据
维普
