Grirem Advanced Materials Co., Ltd.

Longsheng Zhao

Meng Wang

Yang Xu

Xiaowei Huang

Liangshi Wang

Xu Guang Sun

Zongyu Feng

Yongqi Zhang

Chao Xia

Xiangsheng Liu

The present invention provides a process for metallurgy and separating a rare earth concentrate using a combination method, the process including: treating the rare earth concentrate containing bastnaesite by using a method including roasting under an atmosphere, leaching with hydrochloric acids, and roasting with a sulfuric acid, wherein stepping acid leaching with low-concentration hydrochloric acids is controlled during the leaching with the hydrochloric acids so as to obtain a rare earth solution with a high concentration (150-250 g/L REO), such that a leaching rate of Ce reaches 60% or more, and the content of F in a leaching liquor is reduced by aging; and rare earth is further recovered from a leach residue by roasting with the sulfuric acid and leaching with water, and the total yield of the rare earth reaches 95% or more.

Process for metallurgy and separating rare earth concentrate using combination method

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Beijing, China

Longsheng Zhao