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| Recovery of Heavy Rare Earth Elements from Phosphorite |
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Received:August 30, 2011
Revised:August 30, 2011
Accepted:August 30, 2011
Published Online:October 26, 2011
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| DOI：doi：10.3969/j.issn.1007-7545.年份.期号.顺序号 |
| KeyWord:Recovery of Heavy Rare Earth Elements from Phosphorite |
| Author | Institution |
| Feng linyong |
北京矿冶研究总院 |
| Jiang Xunxiong |
北京矿冶研究总院 |
| Wang shengdong |
北京矿冶研究总院 |
| Fan yanqing |
北京矿冶研究总院 |
| Jiangwei |
北京矿冶研究总院 |
| Zhang denggao |
北京矿冶研究总院 |
| Liuwei |
北京矿冶研究总院 |
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| Abstract: |
| Leaching and solvent extraction of heavy rare earth elements (HREE) from phosphate rock with nitric acid were studied. The effects of temperature, nitric acid concentration, time, and liquid-to-solid ratio on HREE leaching rate were studied. The optimum conditions for leaching HREE is 45% HNO3, 60 ℃, ratio of liquid to solid is 2.5, leaching time is 90 min. Under these conditions, HREE leaching rate and solvent extraction rate are 99% and 98.5% respectively, and total recovery of HREE is up to 97.5%. The decomposition percentage of phosphate rock is greater than 98%. |
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