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| Study on Reaction Mechanism of Separation and Enrichment of REES from Phosphorite by H3PO4 Leaching |
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Received:November 23, 2017
Revised:November 24, 2017
Accepted:November 29, 2017
Published Online:April 16, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.05.013 |
| KeyWord:phosphate ore; rare earth; phosphoric acid leaching; enrichment; mechanism |
| Author | Institution |
| Feng Linyong |
北京矿冶研究总院 |
| Jiang Xunxiong |
北京矿冶研究总院 |
| Fan Yanqing |
北京矿冶研究总院 |
| Wang Shengdong |
北京矿冶研究总院 |
| Zhang Denggao |
北京矿冶研究总院 |
| Tang Jigang |
北京矿冶研究总院 |
| Ying Ping |
北京矿冶研究总院 |
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| Abstract: |
| Reaction mechanism of separation and enrichment of REES by H3PO4 leaching were investigated through theoretical analysis, verification test, mineral microscope, SEM, EDS, XRD, EPMA, and chemical extraction. Namely, by leaching with H3PO4, phosphorus and calcium in fluorapatite are dissolved into solution, situ chemical reaction is carried out between element fluorine and calcium in fluorapatite crystal and produces new phase CaF2, and REES of about 95% in total are separated with phosphorus and enriched in phase CaF2 with isomorphism. |
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