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| Recovery of Zinc and Lead from Zinc Suboxide Bearing High Fluorine and Chlorine |
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Received:August 22, 2019
Revised:August 27, 2019
Accepted:August 27, 2019
Published Online:December 18, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2020.01.003 |
| KeyWord:zinc suboxide; leaching; alkaline cleaning; fluorine; chlorine |
| Author | Institution |
| LUO Yuan-hui |
-有研工程技术研究院有限公司,北京 |
| YUAN Xue-tao |
-有研工程技术研究院有限公司,北京 |
| ZHOU Yu-gao |
-南丹县南方有色金属有限责任公司 |
| MA Bao-jun |
南丹县南方有色金属有限责任公司 |
| LIAO Yi-ping |
-南丹县南方有色金属有限责任公司 |
| DENG Zhong-ji |
-南丹县南方有色金属有限责任公司 |
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| Abstract: |
| Fluorine and chlorine in zinc suboxide were removed by cleaning with mixed solution of NaOH and Na2CO3. Fluorine and chlorine removing efficiency is 92.31% and 96.57%, respectively under the conditions of molar ratio of NaOH and Na2CO3 of 1︰1 and controlled L/S and temperature. Concentration of zinc, fluorine and chlorine in alkaline cleaning solution is 0.37, 0.048, and 0.083 g/L after precipitating. Zinc suboxide whose fluorine and chlorine were removed was leached with zinc electrolytic waste liquid by controlling H2SO4 concentration, L/S and temperature of leaching. Zinc, lead, fluorine and chlorine concentrations in leaching solution are 86.27 g/L, 0.027 g/L, 0.042 mg/L, and 0.078 mg/L. Zinc and lead content in leaching residue is 9.13% and 50.84%, respectively. Recovery efficiency of zinc and lead is 95.36% and 96.57%, respectively. |
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