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| Study on the analysis and treatment technology of fluorine pollution sources during the extracted tungsten smelting process |
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Received:April 12, 2024
Revised:May 10, 2024
Accepted:May 13, 2024
Published Online:August 05, 2025
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| DOI： |
| KeyWord:extraction; tungsten metallurgy; pollution source identification; fluoride; removal |
| Author | Institution |
| XU Shuang |
Jiangwu HC Strack Tungsten Products Co,Ltd |
| LIAO Weihong |
Jiangwu HC Strack Tungsten Products Co,Ltd |
| DUAN Feng |
Institute of Process Engineering, Chinese Academy of Sciences |
| WU Yunpeng |
Jiangwu HC Strack Tungsten Products Co,Ltd |
| ZHANG Wei |
Jiangwu HC Strack Tungsten Products Co,Ltd |
| YU Chunrong |
Jiangwu HC Strack Tungsten Products Co,Ltd |
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| Abstract: |
| Most tungsten mineral raw materials contain fluoride, fluorine as a harmful impurity element throughout the tungsten smelting production links, and eventually into the production wastewater. Different tungsten smelting process produces different amounts of wastewater and components, current research on tungsten smelting wastewater defluoridation process mainly for ion exchange tungsten smelting process, for extraction method tungsten smelting wastewater defluoridation research rarely reported. Extraction method tungsten smelting process wastewater, F- content is usually 15~50mg/L, exceeding the F- discharge limit requirements in wastewater. In this paper, the pollution source identification and analysis method is used to analyze the behavior of tungsten smelting extraction method in each production link. Because of the high concentration of SO42- in wastewater, the removal of fluorine ions in wastewater is studied by the easy industrialization of aluminum salt precipitation adsorption method. The results show that the pH value and the amount of aluminum salt have a great effect on the fluoride removal effect. When the pH value is about 7, Al and F molar ratio is 3:1, the reaction time is more than 10min, and a better fluoride removal effect can be achieved. The cost of wastewater defluorination accounts for about 0.25% of the tungsten smelting cost. |
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