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从锌置换渣中分段浸出锌、铅、镓和锗

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采用分段浸出方法从锌置换渣中选择性提取锌、铅、镓和锗.首段浸出过程通过控制合适的硫酸浓度与液固比条件,锌和镓的浸出率达到90％和99％以上,超过92％的锗留在硫酸浸出渣中;二段采用盐酸作为浸出剂选择性提取铅,铅的浸出率为99％,锗损失率小于2％;三段采用1 mol/L氢氧化钠作为浸出剂,通过破坏硅锗固溶体的结构,实现锗高效溶出(90％).对浸出渣进行物相分析,结果表明:三段浸出过程分别选择性溶解锌置换渣中硫酸锌、硫酸铅以及二氧化硅,实现锌、铅、镓和锗的高效溶出.上述分段浸出工艺为锌置换渣中有价金属高效回收提供了一条新思路.
Hydrometallurgical process for recovery of Zn, Pb, Ga and Ge from Zn refinery residues
Zn, Pb, Ga and Ge were separated and recovered from zinc refinery residues by stepwise leaching. In the first stage, by leaching with H2SO4 media, more than 90％ of Zn and 99％ of Ga were dissolved, leaving 92％ of Ge in the leaching residue. In the second stage, by leaching with HCl media, approximately 99％ of Pb and less than 2％ of Ge were selectively dissolved. Finally, the remaining 90％ of Ge was extracted in 1 mol/L NaOH solution by destroying the correlation between SiO2 and Ge. XRD pattern of the leaching residue demonstrated that ZnSO4·H2O, PbSO4 and SiO2 were removed sequentially through the stepwise leaching. The proposed process achieved high recoveries of Zn, Pb, Ga and Ge, thus presenting a potential industrial application.

zinc refinery residuesgalliumgermaniumstepwise leaching

饶帅、刘志强、王东兴、曹洪杨、朱薇、张魁芳、陶进长

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广东省科学院 稀有金属研究所,广州 510650

广东省科学院稀有金属分离与综合利用国家重点实验室,广州 510650

广东省科学院广东省稀土开发及应用研究重点实验室,广州 510650

锌置换渣 镓 锗 分段浸出

authors are grateful for the financial supports from the National Natural Science Foundation of Chinaauthors are grateful for the financial supports from the National Natural Science Foundation of ChinaNational Key Research and Development ProjectNatural Science Foundation of Guangdong Province, ChinaScience and Technology Planning Project of GuangzhouGuangdong Academy of Science Doctor Special Program of ChinaGuangdong Academy of Science Doctor Special Program of ChinaGuangdong Academy of Science Doctor Special Program of ChinaGuangdong Academy of Science Doctor Special Program of China

51804083517040812018YFC19031042019A15150116282019040101062020GDASYL-01040272019GDASYL-01050792019GDASYL-03020112019GDASYL-0402003

2021

10.1016/S1003-6326(21)65517-6

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(2)
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