| 废钨回收中钨酸钠结晶料的除铬处理研究与实践 |
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| 引用本文： | 谢盛德,李春海,雷吟春.废钨回收中钨酸钠结晶料的除铬处理研究与实践[J].稀有金属与硬质合金,2012(3):8-12. |
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| 作者姓名： | 谢盛德 李春海 雷吟春 |
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| 作者单位： | 郴州钻石钨制品有限责任公司 |
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| 摘 要： | 针对碳酸钠熔炼法回收废钨过程中因钨酸钠结晶料溶解液中铬含量高而造成后续工艺分相困难这一问题,通过工艺原理分析及对比试验,进行了在硫化除钼时同时除铬的研究,并确定了相关工艺的优化条件。结果表明,当硫化钠添加量为理论量的4倍时,控制pH=8～9,并选择合适的温度和陈化时间,除铬效果良好,可满足后续萃取工艺的生产,且产品APT质量达到GB/T 10116—2007中APT-0级的要求。
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| 关 键 词： | 废钨回收 钨酸钠结晶料 硫化钠 除铬处理 萃取工艺 APT产品 |
Research and Practice of Chromium Removal from Sodium Tungstate Crystal Material during Waste Tungsten Recovery |
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| XIE Sheng-de,LI Chun-hai,LEI Yin-chun.Research and Practice of Chromium Removal from Sodium Tungstate Crystal Material during Waste Tungsten Recovery[J].Rare Metals and Cemented Carbides,2012(3):8-12. |
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| Authors: | XIE Sheng-de LI Chun-hai LEI Yin-chun |
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| Affiliation: | (Chenzhou Diamond Tungsten Products Co.,Ltd,Chenzhou 423037,China) |
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| Abstract: | High-content chromium in sodium tungstate solution results in phase separation difficulty of subsequent processes during waste tungsten recovery by sodium carbonate melting.In view of the above problem,chromium removal together with molybdenum removal by vulcanization was studied through process principle analysis and comparison tests.And the optimal conditions of the relevant process were determined.The results show that when sodium sulfide dosage is four times of the theoretical amount,pH is controlled at 8~9,and the appropriate temperature and aging time are selected,chromium removal efficiency is high to meet production requirements of the subsequent extraction process,and the quality of the product APT reaches the APT-0 level in GB/T 10116—2007. |
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| Keywords: | waste tungsten recovery sodium tungstate crystal material sodium sulfide chromium removal processing extraction process APT product |
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