文档介绍：doi:.1007-
从湿法锌冶炼废渣中提取银和铅
高丽霞,戴子林,张魁芳,刘志强
(广东省稀有金属研究所广东省稀土开发及应用重点实验室,广州 510651)
摘要:对湿法炼锌废渣经焙烧和酸浸后得到的酸浸渣进行***盐浸出提取银和铅。考察NaCl浓度、液固比、浸出温度、浸出时间对浸出过程的影响。最佳浸出条件为:NaCl浓度250 g/L、液固比5︰1、反应温度80~100 ℃、反应时间3~4 h。在最佳条件下,Ag、%和81%。***盐循环浸出3次效果较好,Ag的浓度达到139 mg/L,%,%。
关键词:湿法炼锌废渣;铅;银;***化钠;浸取
中图分类号:TF832;TF812;TF813 文献标志码:A 文章编号:1007-7545(2018)05-0000-00
Extraction of Silver and Lead from Slag of Zinc Hydrometallurgy
GAO Li-xia, DAI Zi-lin, ZHANG Kui-fang, LIU Zhi-qiang
(Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangdong Institute of Rare Metals, Guangzhou 510651, China)
Abstract:Chloride leaching was applied to extract Ag and Pb from acid-leaching residues of zinc hydrometallurgy slag after roasting and acid leaching. The effects of NaCl concentration, L/S, leaching temperature, and leaching time on leaching of Ag and Pb were investigated. The results show that leaching rate of Ag and Pb is % and 81% respectively under the optimum conditions including NaCl concentration of 250 g/L, L/S=5︰1, leaching temperature of 80~100 ℃, and leaching time of 3~4 h. The optimum chloride recycle leaching time is three-cycle, after which silver content in leaching solution is 139 mg/L, leaching rate of Ag and Pb is % and % respectively.
Key words:slag of zinc hydrometallurgy; lead; silver; sodium