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| Equilibrium of Water, Rare Earth and Magnesium Sulfate in Column Leaching Process of Ion-Absorbed Rare Earth Deposits |
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Received:May 05, 2018
Revised:May 21, 2018
Accepted:May 22, 2018
Published Online:September 19, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.10.009 |
| KeyWord:magnesium sulfate; ion-absorbed rare earth deposits; column leaching; leaching rate; equilibrium rate |
| Author | Institution |
| Wang Ruixiang |
江西理工大学 冶金与化学工程学院 |
| Guo Yuedong |
江西理工大学 冶金与化学工程学院 |
| Fang zhuang |
江西理工大学 冶金与化学工程学院 |
| Chen fanghui |
江西理工大学 冶金与化学工程学院 |
| Yu Pan |
浙江华友钴业股份有限公司 |
| XUzhi-feng |
江西理工大学 冶金与化学工程学院 |
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| Abstract: |
| Ionic type rare-earth ore was column leached with ammonia magnesium sulfate leaching. Equilibrium of H2O, REO, Mg2 , and SO2- 4 during leaching was investigated. The results show that water absorbing capacity of rare earth ore is about 344 mL/kg. Leaching rate of rare earth elements is 99% above with loss rate of only 0.045% during the whole process. 0.24% magnesium ions residue exists in orebody, amount of magnesium ions in leaching solution rises 4.7% with balance rate of 98.76%. SO2- 4 rises by 0.52%. Leaching rates of impurities Fe and Si drop from 0.435% and 0.703% with ammonium sulfate as leaching agent to 0.03% and 0.13% respectively with magnesium sulfate as leaching agent, while leaching rate of impurities Al remains unchanged. |
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