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| Removal of Fluorine and Chlorine from Zinc Leaching Solution by P204 Extraction |
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Received:August 22, 2019
Revised:August 27, 2019
Accepted:August 27, 2019
Published Online:February 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.03.003 |
| KeyWord:P204; extraction; stripping; fluorine; chlorine; zinc leaching solution |
| 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 |
| WEI Zhi-wei |
-南丹县南方有色金属有限责任公司 |
| Yang Ming-xue |
-南丹县南方有色金属有限责任公司 |
| Nong na |
-南丹县南方有色金属有限责任公司 |
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| Abstract: |
| Fluorine and chlorine were removed from zinc leaching solution by P204 extraction. Zinc extraction efficiency is 95% above, stripping efficiency is 99% above, and recovery efficiency is 98% above. Fluorine and chlorine removing efficiency is both over 99%. The optimum extraction conditions include saponification efficiency of 65%, zinc feed liquid pH=4.0, extracting temperature of 40 ℃, O/A=2, and extracting time of 5 min. The optimum stripping conditions include H2SO4 concentration of 120 g/L, temperature of 40 ℃, O/A=0.5, and stripping time of 5 min. Organic phase emulsification and long time phase separation can be avoided under temperature of 40-45 ℃. Concentration of Zn, F, Cl in raffinate of cascade test is 2.42, 0.52, and 1.42 g/L, respectively. F and Cl concentration drops to 0.042 g/L and 0.079 g/L after precipitating. The raffinate can be reused in zinc leaching and solution after precipitating. |
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