|
| Enhance Leaching of Medium and Heavy Rare Earth with Carboxylate Compound Lixiviant |
| Received:October 11, 2019 Revised:October 12, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2020.03.011 |
| KeyWord:weathered crust elution-deposited rare earth ores; ammonium acetate; compound lixiviant; heavy rare earth |
| Author | Institution |
| LI Chun-hua |
武汉工程大学 资源与安全工程学院 |
| ZHANG Zhen-yue |
武汉工程大学 资源与安全工程学院 |
| CHI Ru''an |
武汉工程大学 资源与安全工程学院 |
| LIU Defeng |
武汉工程大学 资源与安全工程学院 |
| CHEN Zhuo |
武汉工程大学 资源与安全工程学院 |
| CHI Xiao-wang |
武汉工程大学 资源与安全工程学院 |
|
| Hits: 759 |
| Download times: 676 |
| Abstract: |
| Myanmar rare earth ores and Fujian rare earth ores were studied by column leaching method. Ore properties and effects of ammonium acetate concentration on leaching of light, medium and heavy rare-earth were investigated. The results show that Myanmar rare earth ores and Fujian rare earth ores belong to middle yttrium type middle heavy rare earth ore and europium-rich light rare earth ore respectively and there were negative anomalies of cerium and europium. Leaching efficiency of rare earth rises with addition of ammonium acetate. The optimum addition concentration of ammonium acetate is 0.04 mol/L, rare earth leaching efficiency rises to 95%, and then reach the leaching equilibrium. Ammonium acetate mainly enhances leaching of lanthanum, which leads to drop of ratio of light and medium heavy rare earth in Myanmar rare earth ores from 1.04 to 0.98 and in Fujian rare earth ores from 1.65 to 1.47. Ammonium acetate can significantly improve leaching of medium and heavy rare earth. |
| Close |