Study on New Smelting Process of Bastnaesite AITranslate
Abstract AITranslate
The present process of oxidation roasting-acid leaching of bastnaesite generates HF waste gas, resulting in a waste of fluorine resource and environment pollution. And meanwhile the process of hydrochloric acid leaching-sodium hydroxide decomposition has the disadvantages of high leaching acidity, large liquidsolid ratio,high leaching temperature and long leaching time. In view of the above problems, a new smelting process of bastnaesite is introduced,namely low temperature activation-cascade acid leaching. Experi- mental results show that bastnaesite can be activated by roasting at 400 ℃ for 2 h. After five-stage cascade acid leaching of the roasted ore,the leaching rate of rare earth carbonate is increased to 98.39% and the leaching rate of rare earth fluoride is reduced down to 0. 014%. The new process is characterized by high u- tilization rate of rare earth resources and fluorine recycling to achieve the objectives of high efficiency,energy-saving and environmental-friendly metallurgy.
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DOI：
Chinese Library Classification Number:TF845.6[冶金工程—有色金属冶金]
Citation Information:
The present process of oxidation roasting-acid leaching of bastnaesite generates HF waste gas, resulting in a waste of fluorine resource and environment pollution. And meanwhile the process of hydrochloric acid leaching-sodium hydroxide decomposition has the disadvantages of high leaching acidity, large liquidsolid ratio,high leaching temperature and long leaching time. In view of the above problems, a new smelting process of bastnaesite is introduced,namely low temperature activation-cascade acid leaching. Experi- mental results show that bastnaesite can be activated by roasting at 400 ℃ for 2 h. After five-stage cascade acid leaching of the roasted ore,the leaching rate of rare earth carbonate is increased to 98.39% and the leaching rate of rare earth fluoride is reduced down to 0. 014%. The new process is characterized by high u- tilization rate of rare earth resources and fluorine recycling to achieve the objectives of high efficiency,energy-saving and environmental-friendly metallurgy.
quote
| GB/T 7714-2015 | [1] YANG Qing-shan, YANG Tao. Study on New Smelting Process of Bastnaesite[J]. Rare Metals and Cemented Carbides, 2014(1): 1-4. |
| MLA | [1] YANG Qing-shan, and YANG Tao. "Study on New Smelting Process of Bastnaesite." Rare Metals and Cemented Carbides, no. 1, 2014, pp. 1-4. |
| APA | [1] YANG Qing-shan, & YANG Tao. (2014). Study on New Smelting Process of Bastnaesite. Rare Metals and Cemented Carbides(1), 1-4. |
| IEEE | [1] YANG Qing-shan and YANG Tao, "Study on New Smelting Process of Bastnaesite," Rare Metals and Cemented Carbides, no. 1, pp. 1-4, 2014. keywords: {bastnaesite;new smelting process;low temperature activation;cascade acid leaching;rare earthcarbonate;rare earth fluoride;leaching rate} |