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| Study on Defluorination from Chloridization Leaching Solution of Lead Anode Slime |
| Received:April 07, 2015 Revised:April 15, 2015 |
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| DOI：doi：10.3969/j.issn.1007-7545.2015.10.004 |
| KeyWord:lead anode slime; chloridization leaching solution; sodium chloride; defluorination |
| Author | Institution |
| ZhongYang |
浙江工业大学材料科学与工程学院 |
| zheng Guo-qu |
浙江工业大学 |
| WU Liankui |
浙江工业大学材料科学与工程学院 |
| Cao Hua-zhen |
浙江工业大学材料科学与工程学院 |
| Chen Jin-zhong |
广西华锡集团有限责任公司科技部 |
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| Abstract: |
| Fluosilicic acid and silicofluoride were removed from chloride leaching solution of lead anode slime by sodium chloride. The effects of sodium chloride dosage, reaction time, precipitation time and temperature on fluorine removal rate were investigated. Fluoride concentration is reduced to 2.43 g/L below with fluorine removal rate of 87.7% under the optimum conditions. Crystallization does not occur in defluorination solution during distillation process as to avoid blockage of distillation pipe. Distillate with fluoride concentration of 3 g/L meets the requirement of recycling for leaching. |
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