Title:
METHOD FOR RECOVERING RARE EARTH FROM EUDIALYTE
Document Type and Number:
WIPO Patent Application WO/2022/188248
Kind Code:
A1
Abstract:
The present invention relates to the technical field of eudialyte beneficiation. Disclosed is a method for recovering rare earth from eudialyte, comprising the following steps: S1, crushing and screening raw ore to obtain ore to be separated and first tailings; S2, performing color sorting on the ore to be separated to obtain a color sorted concentrate and second tailings; S3, grinding the color sorted concentrate to obtain ore pulp; S4, performing magnetic separation on the ore pulp to obtain a rare earth-containing eudialyte concentrate, and third tailings; and S5, performing leaching on the rare earth-containing eudialyte concentrate to obtain a rare earth leaching solution and a leaching residue. In the present invention, the color sorting and magnetic separation combined process is applied to eudialyte beneficiation, so that the sorting of low-grade rare earth-containing eudialyte ore is realized, providing a technical premise for conversion of eudialyte into ore having an economic value. Moreover, in the present invention, the leaching rate can reach 97.3%, the total loss rate of rare earth of three discarded tailings in the whole process flow is lower than 40%, and the effects of high beneficiation efficiency, small amount of magnetic separation ore, low energy consumption and environmental friendliness are achieved.
Inventors:
XIONG WENLIANG (CN)
ZHANG LIJUN (CN)
ZHOU JIAYUN (CN)
LIN HUIJIE (CN)
CHEN DA (CN)
YAN SHIQIANG (CN)
ZHANG LIJUN (CN)
ZHOU JIAYUN (CN)
LIN HUIJIE (CN)
CHEN DA (CN)
YAN SHIQIANG (CN)
Application Number:
PCT/CN2021/089634
Publication Date:
September 15, 2022
Filing Date:
April 25, 2021
Export Citation:
Assignee:
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES (CN)
International Classes:
C22B1/00; B02C21/00; B03C1/02; B07C5/342; C22B3/00; C22B3/06; C22B3/08; C22B3/10; C22B59/00
Domestic Patent References:
| WO2014169322A1 | 2014-10-23 |
Foreign References:
| CN111921696A | 2020-11-13 | |||
| CN111921695A | 2020-11-13 | |||
| CN103243226A | 2013-08-14 | |||
| RU2288171C1 | 2006-11-27 |
Attorney, Agent or Firm:
CHENGDU JEWEIHO INTELLECTUAL PROPERTY LAW FIRM (CN)
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