| 钽铌冶炼厂含氟废水资源化治理技术 |
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| 引用本文： | 杜璞欣,宋卫锋,刘勇,周吉奎,吕先谨. 钽铌冶炼厂含氟废水资源化治理技术[J]. 化工环保, 2012, 40(5): 487-493. DOI: 10.3969/j.issn.1006-1878.2020.05.005 |
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| 作者姓名： | 杜璞欣 宋卫锋 刘勇 周吉奎 吕先谨 |
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| 作者单位： | 1.广东工业大学 环境科学与工程学院,广东 广州 510006;2.广东省资源综合利用研究所,广东 广州 510650;3.稀有金属分离与综合利用国家重点实验室,广东 广州 510650;4.广东省矿产资源开发和综合利用重点实验室,广东 广州 510650 |
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| 基金项目： | 广东省省级科技计划项目 （2015B020235003）; 广东省科学院发展专项资金项目（2018GDASCX-0109） |
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| 摘 要： | 采用合金膜电渗析法分离富集钽铌冶炼厂含氟废水中的F-和SO42-。最优的工艺运行条件为：膜对电压0.500 V,膜面流速4.09 cm/s。在此条件下电渗析30 min,F-去除率达97.53%,SO42-去除率接近100%。优化条件下运行电渗析器,一段淡水中大部分的F-和SO42-均被去除,可以直接回用。一段电渗析的浓水再经多段电渗析浓缩,以LiOH·H2O沉淀F-得到LiF产品,该LiF产品纯度达99.06%,满足GB/T 22666—2008标准的3级品要求。LiF收率为84.92%,F-整体回收率为79.45%。
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| 关 键 词： | 钽铌冶炼 含氟废水 电渗析 氟化锂 |
| 收稿时间： | 2020-02-03 |
Resource recovery technology of fluorine-containing wastewater intantalum and niobium smelting plant |
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| DU Puxin,SONG Weifeng,LIU Yong,ZHOU Jikui,Lv Xianjin. Resource recovery technology of fluorine-containing wastewater intantalum and niobium smelting plant[J]. Environmental Protection of Chemical Industry, 2012, 40(5): 487-493. DOI: 10.3969/j.issn.1006-1878.2020.05.005 |
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| Authors: | DU Puxin SONG Weifeng LIU Yong ZHOU Jikui Lv Xianjin |
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| Affiliation: | 1. School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China;2. Guangdong Institute of Resources Comprehensive Utilization,Guangzhou 510650,China;3. State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;4. GuangdongKey Laboratory of Mineral Resources Development and Comprehensive Utilization,Guangzhou 510650,China |
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| Abstract: | F- and SO42- in fluorine-containing wastewater in a tantalum and niobium smelting plant were separated and enriched by alloy membrane electrodialysis. The optimal process operation conditions are as followsvoltage on a pair of membranes 0.500 V,membrane surface velocity 4.09 cm/s. When the wastewater was treated by electrodialysis under these conditions for 30 min,the F- removal rate reached 97.53% and the SO42- removal rate was close to 100%. Running the electrodialyzer under optimized conditions,most of the F- and SO42- in the diluted solution of the first-stage process were removed and could be reused directly. The concentrated water of the first-stage electrodialysis was then subjected to multiple stages of electrodialysis and LiF was obtained by F-precipitation with LiOH·H2O. The purity of the product reaches 99.06%,which meets the Grade 3 standard of GB/T 22666-2008. The yield of LiF is 84.92%,and the overall recovery rate of F- is 79.45%. |
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| Keywords: | tantalum and niobium smelting fluorine-containing wastewater electrodialysis lithium fluoride |
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