从湿法锌冶炼废渣中高效回收银的研究  

High Efficiency Recovery of Silver from Slag of Zinc Hydrometallurgy

作　　者：高丽霞[1] 戴子林[1] 李桂英[1] 张魁芳 刘志强[1] 

机构地区：[1]广州有色金属研究院,广州510651

出　　处：《有色金属（冶炼部分）》2016年第4期45-48,65,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：广东省科技计划项目(2015A020215018)

摘　　要：针对硫酸钙含量高的锌冶炼废渣中银回收困难的问题,对浸银体系进行筛选,得出"NaCl+H2SO4+NaClO3"为最佳浸银体系。最佳工艺条件为:酸浸渣50g、氯化钠浓度300g/L、液固比5∶1、硫酸用量6g、氯酸钠用量3g、浸出温度90℃、浸出时间3h。在此最优条件下,银浸出率达到97%,铅浸出率达到91%。To address difficulty to recover silver from zinc slag with high content of calcium sulfate,silver leaching system was screened.＂NaCl＋ H2SO4 ＋ NaClO3＂is the optimum system for silver leaching.Leaching rate of silver and lead is 97%and 91%respectively under the optimum conditions including acidleaching slag of 50 g,NaCl concentration of 300g/L,ratio of liquid to solid of 5∶1,H2SO4 dosage of 6g,NaClO3 dosage of 3g,reaction temperature of 90 ℃,and leaching time of 3h.

关 键 词：湿法炼锌 废渣 银 氯盐 浸出 

分 类 号：TF832[冶金工程—有色金属冶金]