Leaching Behavior of Lead and Silver from Lead Sulfate Hazardous Residues in NaCl-CaCl2-NaClO3 Media

被引：6
作者：
Zhang, Yuhui [1 ]
Jin, Bingjie [1 ,2 ]
Song, Qinghe [1 ]
Chen, Buming [1 ,2 ]
Wang, Chengyan [3 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China
[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
来源：
JOM | 2019年 / 71卷 / 07期
基金：
中国国家自然科学基金;
关键词：
SODIUM-CARBONATE; ZINC; RECOVERY; CONCENTRATE; EXTRACTION; TAILINGS;
D O I：
10.1007/s11837-019-03472-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The leaching behavior of lead and silver from lead sulfate residues in NaCl-CaCl2-NaClO3 media was studied systematically. The results indicate that Cl- concentration, NaClO3 concentration, leaching time and temperature had significant effects on lead and silver leaching, whilst agitation speed and the liquid-solid ratio had a secondary effect on silver leaching but little effect on lead leaching. The Ca2+ concentration had an important effect on SO42- removal but little effect on lead and silver leaching. The optimum parameters for lead and silver leaching were: initial Cl- concentration: 207.5g/L; NaClO3 concentration: 12g/L; Ca2+ concentration: 1.3 times of stoichiometric quantity; temperature: 90 +/- 2 degrees C; time: 1h; liquid-solid ratio: 8:1-10:1; and agitation speed: 450rpm. The lead and silver leaching were>98% and 95%, respectively. The removal ratio of SO42- was>98%. The leaching kinetics of lead follow the shrinking core model of mixed control, and the apparent activation energy was 13.4kJ/mol.
引用
收藏
页码：2388 / 2395
页数：8
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