Abstract
The research of recovering WO3 from ammonia leaching slag in the extractive process of tungsten has been performed. The results show that the mechanically activated decomposition with Na2CO3 for ammonia leaching slag is feasible. After the treatment of ammonia leaching slag containing WO3 10%, the content of insoluble WO3 in residue is 1%–2% and the tungsten recovery is 81%–90% when the total amount of Na2CO3 and NaOH is 4 times of their theoretical value and the slag is kept for 2 hours at 190 C. The obtained Na2WO4 solution can satisfy the requirements of subsequent production process after purification.
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References
Sun Peimei, Li Honggui, Liu Maosheng,et al. The study of mechanical activated caustic decomposition of low grade concentrate of sheelite. Rare Metals (in Chinese), 1990, 14(2):85–88
Liu Maosheng, Sun Peimei, Li Honggui,et al. Mechanical activated caustic decomposition of tungsten concentrate with a high content of calcium. In: Chen Jiayong, Yang Songqing, Deng Zuoqing, eds. Proceedings of ICHM’92. Changsha, 1992. 296–301
Sun Peimei, Li Honggui, Liu Maosheng,et al. The behaviour of impurities in soda leaching process for low grade tungsten concentrate. Journal of Central-South Institute of Mining and Metallurgy (in Chinese), 1994, 25(4):465–469
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Synopsis of the first author Sun Peimei, associate professor, born in 1945, specilizing in rare metallurgy and hydrometallurgy.
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Sun, P., Li, H., Li, Y. et al. Study on treatment of ammonia leaching slag in the metallurgical process of tungsten. J. Cent. South Univ. Technol. 2, 21–26 (1995). https://doi.org/10.1007/BF02652002
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DOI: https://doi.org/10.1007/BF02652002