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| Recovery of Low Concentration Gallium from Alkaline Solution |
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Received:July 17, 2018
Revised:July 19, 2018
Accepted:July 23, 2018
Published Online:October 16, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.11.008 |
| KeyWord:red mud; gallium; ion-exchange; recovery |
| Author | Institution |
| lu fanghai |
贵州理工学院材料与冶金工程学院 |
| wangzhicheng |
贵州理工学院材料与冶金工程学院 |
| PENG nan-dan |
贵州理工学院材料与冶金工程学院 |
| HU chao-lan |
贵州理工学院材料与冶金工程学院 |
| HUANG fang |
贵州理工学院材料与冶金工程学院 |
| LI jian |
贵阳市城市发展投资（集团）股份有限公司Guiyang urban development investment Group company Limited |
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| Abstract: |
| Ga2O3 content in red mud from one alumina company is as high as 96.25 mg/kg in addition to a large amount of Fe2O3, Al2O3 and Na2O. 90.41% of gallium as well as most of Al2O3 and Na2O were leached through reductive sintering-leaching process with spent pot-lining as reductant. Gallium in leachate was considered as a recovery valuable component due to its concentration of 7.19 mg/L. Ion-exchange process was employed to extract gallium from leachate. The results indicate that gallium adsorption rate is 52.13% under optimum conditions including resin dosage of 0.6 g/mL, temperature of (50±0.5) °C, adsorption time of 24 h, and oscillation rate of 120 r/min. Average desorption rate of 92.29% for gallium-loaded resin is achieved with dilute sulfuric acid as desorption reagent. Gallium concentration in desorption solution is 86.43 mg/L, which is enriched by 12 and 4 times compared to the initial leaching solution of 7.19 mg/L and the secondary re-circulation solution of 21.62 mg/L, respectively. |
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