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Wang M.,Leshan Shenghe Rare Earths Co. | Zeng M.,Leshan Shenghe Rare Earths Co. | Wang L.,General Research Institute for Nonferrous Metals, China | Zhou J.,Leshan Shenghe Rare Earths Co. | And 4 more authors.
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | Year: 2013

This paper investigated the development of a new environment friendly approach for treatment of bastnaesite. A new process was developed to recover fluorine from bastnaesite as CeF3 by-product, to enhance the rare earths leaching rate, especially the high-value rare earths. The conditions affecting the rare earths leaching in the process, including roasted temperature, leaching temperature, acidity, liquid/solid ratio and leaching additive, were investigated. The results indicated that the rare earths leaching rate was about 65.1%, the rare earths leaching rate without cerium was nearly 93.3%, and the ratio of CeO2/TREO in the residue almost reached at 94.1% under the optimized conditions.

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