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| Experiment of Leaching of Ion-type Rare Earth Ore |
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Received:December 03, 2021
Revised:December 20, 2021
Accepted:December 22, 2021
Published Online:April 12, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.05.008 |
| KeyWord:ion-type rare earth ore; stirring leaching; column leaching; ammonium sulfate; magnesium sulfate |
| Author | Institution |
| LI Chao |
中国地质科学院矿产综合利用研究所 |
| SHU Rong-bo |
中国地质科学院矿产综合利用研究所 |
| CHENG Rong |
中国地质科学院矿产综合利用研究所 |
| WANG Ling-xi |
中国地质科学院矿产综合利用研究所 |
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| Abstract: |
| By applying stirring leaching and column leaching method, ion-type rare earth ore in South China was studied to investigate leaching of rare earth and impurity elements in mineral samples under different conditions, which provides a reference for green and efficient mining of ion-type rare earth mineral resources. The results show that ratio of solid to liquid of leaching solution has a greater impact on leaching rate of ionic phase rare earths, while leaching time has little effect. Leaching process of ionic phase rare earths takes a short time and reacts quickly. During column leaching, ion phase rare earth elution rate is the fastest and equilibrium time is short. The impurity element concentration in leaching solution is high in the early stage, but the subsequent smearing is serious. Leaching rate of ionic phase rare earths drops with increase of sampling depth, which is in line with southern ion-type rare earth mineralization law. During ammonium sulfate leaching, loss of ammonium ion is serious, and the minimum loss rate exceeds 11.31%. Sulfate ion does not participate in the exchange reaction process of metal ions, so the overall recovery rate can reach up to 99.22%. |
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