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| Gallium Recovery from Alumina Red Mud with Hydrochloric Acid Leaching |
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Received:December 29, 2011
Revised:December 29, 2011
Accepted:December 31, 2011
Published Online:July 25, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.08.011 |
| KeyWord:Bayer process; red mud; leaching; liquid-solid rate; recovery |
| Author | Institution |
| Wang keqin |
太原理工大学 |
| Li shenghu |
太原理工大学 |
| ZHU guohai |
太原理工大学 |
| Song jiawei |
太原理工大学 |
| Gao yan |
太原理工大学 |
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| Abstract: |
| The hydrochloric acid leaching process of gallium from Bayer red mud was studied. The effects of leaching temperature, time, ratio of liquid to solid (L/S) and concentration of hydrochloric acid on the leaching rate of gallium were investigated with orthogonal test. The results show that the leaching rate of gallium is 95.4% under the optimum conditions including hydrochloric acid concentration of 8 mol/L, L/S=4.0, 5 hours leaching at 109 ℃. The extraction rate of gallium reaches 98% with 50% TBP＋50% kerosene, the stripping rate of gallium is 96.8% with 0.5% salt solution. The stripping solution is neutralized with 0.5mol/L NaOH solution and then filtrated and dried. The gallium mass percentage is 4.32% in solid and is enriched 136-fold from the red mud. The total gallium recovery is above 85%. |
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