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| Technical Study on Rare Earth Recovery from Fluorescent Powder Scrap |
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Received:March 28, 2012
Revised:March 28, 2012
Accepted:March 29, 2012
Published Online:September 19, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.10.008 |
| KeyWord:fluorescent powder scrap; rare earth; acid leaching; alkali roasting; recovery |
| Author | Institution |
| Yang You-ming |
江西理工大学冶金与化学工程学院 |
| Deng Sheng-hua |
江西理工大学冶金与化学工程学院 |
| Xie Fang-hao |
江西理工大学冶金与化学工程学院 |
| Lan Qiao-fa |
江西理工大学冶金与化学工程学院 |
| Shen Wen-ming |
江西理工大学冶金与化学工程学院 |
| Huang Zheng-hua |
江西理工大学冶金与化学工程学院 |
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| Abstract: |
| Rare earths (RE) were recovered from fluorescent powder scrap with four schemes, the effects of hydrochloric acid and hydrogen peroxide dosage on the leaching rate of RE were studied. Then Ce and Tb was extracted from waste residue with sodium carbonate roasting process, at last the leaching solution was edulcorated with neutralization process. The results show that the leaching rate of Y and Eu can reach 99% with the optimum dosage of hydrochloric acid of 150 mL and hydrogen peroxide of 20 mL for 100 g materials. The leaching rate of Tb can reach 55% after sodium carbonate roasting; Fe, Si and Al are reduced to 11.47 mg/L, 15.93 mg/L and 0.15 g/L after edulcorating. |
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