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| Removal of Fluorine and Chlorine from Zinc Leaching Solution by N235 Extraction |
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Received:August 22, 2019
Revised:August 27, 2019
Accepted:August 27, 2019
Published Online:March 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.04.002 |
| KeyWord:N235; extraction; stripping; fluorine; chlorine |
| Author | Institution |
| Chu Li-jun |
-南丹县南方有色金属有限责任公司 |
| Su Qiu-qiong |
-南丹县南方有色金属有限责任公司 |
| Luo Yuan-hui |
-有研工程技术研究院有限公司,北京 |
| Yuan Xuetao |
-有研工程技术研究院有限公司,北京 |
| Mo Yi |
-南丹县南方有色金属有限责任公司 |
| Li Xiaotong |
-南丹县南方有色金属有限责任公司 |
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| Abstract: |
| N235 was used to extract zinc and remove fluorine and chlorine from zinc leaching solution. Fluorine and chlorine were extracted into organic phase. Zinc extraction rate is lower than 5%, fluorine extraction rate is over 80%, and chlorine extraction efficiency is over 94%. Organic phase emulsification and long time phase separation can be avoided when isooctanol is added to N235 organic phase, and temperature of extraction, washing and stripping is controlled at 40-45 ℃. Concentrations of Zn, F, Cl in raffinate is 55.54, 0.011 and 0.082 g/L respectively, which can be reused in zinc leaching, purification, and electrolyte preparation. |
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