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Title:
RARE EARTH PRECIPITATION DEVICE AND RARE EARTH PRECIPITATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/063989
Kind Code:
A1
Abstract:
A rare earth precipitation device and a rare earth precipitation method. The rare earth precipitation device comprises: a precipitation container (10), having a body and an accommodating cavity enclosed by the body; a feeder (20), supplying rare earth material liquid and a precipitating agent to the accommodating cavity of the precipitation container (10); a stirrer (30) having a stirring paddle, the stirring paddle being provided in the accommodating cavity; and a sealing cover (50), the sealing cover (50) being detachably provided at the top of the body to seal the accommodating cavity. The provision of the sealing cover (50) increases the pressure in a reaction space and enhances the forward progression of the precipitation reaction, facilitating the formation of crystallites and reducing the growth speed of precipitated crystals, making the particle size of the precipitated samples relatively small, the crystallization rate low, and the precipitated samples contain less impurities; second, the closed operation can improve the operating environment, and the precipitating agent and the rare earth material liquid participate in the reaction at a relatively stable ratio, improving the use efficiency of the precipitating agent; and finally, the closed operation can increase the stirring intensity, the pH distribution of the liquid phase being uniform, facilitating the growth of grain size of the crystal more uniformly.

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Inventors:
LIU ZHAOBO (CN)
WANG WEIWEI (CN)
SUN NINGLEI (CN)
FU GUOYAN (CN)
LI MINGCHUAN (CN)
LIU GUO (CN)
Application Number:
PCT/CN2019/109221
Publication Date:
April 02, 2020
Filing Date:
September 29, 2019
Export Citation:
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Assignee:
CHINA ENFI ENG CORP (CN)
International Classes:
C22B3/02; C22B3/44; C22B59/00
Foreign References:
CN205115570U2016-03-30
CN102816930A2012-12-12
CN209443066U2019-09-27
CN109022767A2018-12-18
CN109182742A2019-01-11
CN104419839A2015-03-18
JPS61163108A1986-07-23
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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