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| Study on Wet and Efficient Recovery of Lead from Lead Slag |
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Received:August 26, 2021
Revised:September 01, 2021
Accepted:September 06, 2021
Published Online:December 17, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2022.01.002 |
| KeyWord:lead residue; chlorination leaching; replacement; sponge lead |
| Author | Institution |
| WANG Jun-e |
低品位难处理黄金资源综合利用国家重点实验室;;紫金铜业有限公司;;中南大学;;中南大学 |
| LIN Hong-fu |
低品位难处理黄金资源综合利用国家重点实验室 |
| CHEN Hang |
低品位难处理黄金资源综合利用国家重点实验室 |
| ZHONG Shui-ping |
低品位难处理黄金资源综合利用国家重点实验室 |
| ZHANG Heng-xing |
低品位难处理黄金资源综合利用国家重点实验室 |
| WU Xing-lin |
低品位难处理黄金资源综合利用国家重点实验室 |
| CHI Xiao-peng |
福州大学紫金矿业学院 |
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| Abstract: |
| Applying lead residue from leaching of zinc oxide dust as raw material, a comprehensive treatment process of chlorination leaching, lead replacement with zinc sheet, neutralization and zinc precipitation after replacement was developed. Effects of reagent concentration, L/S and temperature on chlorination leaching were investigated, and exploratory experiments of lead replacement precipitation from leaching solution and zinc neutralization precipitation were carried out. The results show that leaching rates of lead, zinc and silver are 98.30%, 81.77% and 29.47% respectively under the optimum conditions including L/S=30 mL/g, temperature of 80 ℃, NaCl concentration of 320 g/L, CaCl2 concentration of 15 g/L, and leaching time of 2 h. The leaching solution is replaced by zinc sheet at 60 ℃, and purity of lead in sponge is 92.09% with total recovery of lead of 95% above. This process can obtain certain economic and social benefits, and provide a feasible reference for treatment of lead-zinc containing solid waste. |
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