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| Primary Exploration on Extracting Process of Rare Earth from Ionic Rare Earth Magnesium Salt Concentrates |
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Received:September 15, 2023
Revised:October 07, 2023
Accepted:October 08, 2023
Published Online:November 30, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2024.01.007 |
| KeyWord:rare earth magnesium salt concentrates; carbonization; acid soluble; neutralization and impurity removal; precipitation; total recovery |
| Author | Institution |
| KE Zhaohua |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
| GUO An |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
| QIU Xiaoying |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
| LIAO Chunsheng |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司,中国稀土集团有限公司研究院 |
| LAN Qiaofa |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司，江西理工大学 |
| GE Liusheng |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
| XIAO Li |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
| HUANG Desheng |
国家离子型稀土资源高效开发利用工程技术研究中心，江西离子型稀土工程技术研究有限公司 |
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| Abstract: |
| The rare earth magnesium salt concentrates obtained by precipitation of MgSO4 rare earth leaching mother liquor with MgO as precipitant have a little amount of REO, which requires further removal of impurities to enrich rare earth. The process of carbonization, acid dissolution, neutralization, impurity removal and precipitation was studied by using ionic rare earth magnesium salts as raw materials. The exploratory test results show that the loss of REO during the carbonization process is minimal or even negligible, and there is 24.33% to 30.9% MgO converts from rare earth magnesium salt concentrates into the carbonized solution. During the neutralization impurity removal process, Fe removal rate is about 99.5%, and Al removal rate is about 98.6%. Rare earth carbonate is obtained by using carbonized liquid as the precipitating agent to precipitate and remove impurities. After burning, the rare earth oxides that meets the quality requirements of the GB/T 20169—2015 ionic rare earth ore mixed rare earth oxides are obtained. The total slag rate of the process is 19.81%—23.22%, and the average total recovery of REO is 89.43%. In order to form a complete set of technology for extracting rare earth from ionic rare earth magnesium salt enrichment and obtain the best technical parameters, further in-depth research and optimization are needed. |
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