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| Study on Leaching of Rare Earth from Weathered Crust Elution Deposited Rare Earth Ore with Complex Ammonium Agents |
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Received:October 10, 2012
Revised:October 29, 2012
Accepted:October 29, 2012
Published Online:March 22, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.04.009 |
| KeyWord:weathered crust elution-deposited rare earth ore; complex leaching agents; ammonium salts; ratio |
| Author | Institution |
| zhangzhenyue |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
| xu zhi gao |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
| wu ming |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
| zhang ting ting |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
| li qiong |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
| chi ru an |
武汉工程大学 绿色化工过程教育部重点实验室 湖北省新型反应器与绿色化学工艺重点实验室 |
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| Abstract: |
| Rare earth (RE) was leached from weathered crust elution-deposited rare earth ore with composite ammonium salts as leaching agent. The effects of ratio of composite ammonium salts and concentration of leaching agent, ratio of liquid to solid (L/S), flow rate and pH value on leaching rate of RE were investigated. The results show that the best mass ratio of leaching agent of NH4Cl, NH4NO3, (NH4)2SO4 is 4∶5∶6. The bigger L/S and lower flow velocity is, the higher leaching rate is. The best leaching effect is achieved when concentration of leaching agent is 10 g/L and pH value is 3.5. |
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