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| Study of Scandium Pre-enrichment from Red Mud Leached by Hydrochloric Acid |
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Received:August 11, 2014
Revised:August 13, 2014
Accepted:August 14, 2014
Published Online:December 24, 2014
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| DOI：10.3969/j.issn.1007-7545.2015.01.014 |
| KeyWord:Bayer process; red mud; scandium; leaching; pre-enrichment |
| Author | Institution |
| XU Lu |
中国地质科学院矿产综合利用研究所 |
| SHI Guang-da |
中国地质科学院矿产综合利用研究所 |
| LI Yuan-kun |
中国地质科学院矿产综合利用研究所 |
| ZHONG Qing-wen |
中国地质科学院矿产综合利用研究所 |
| LUO Yu-zhi |
中国地质科学院矿产综合利用研究所 |
| YU Ping |
中国地质科学院矿产综合利用研究所 |
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| Abstract: |
| The effects of concentration of hydrochloric acid, leaching time and ratio of liquid to solid (L/S) on leaching rate of scandium from red mud of Bayer process were investigated. The results show that leaching rate of scandium is 96.63% under the optimum conditions including hydrochloric acid concentration of 7 mol/L, temperature of 80 ℃, leaching time of 90 min, and L/S=8.0. The extraction rate of scandium reaches 97.99% with P204 as extracting agent. Scandium-rich organic phase is cleaned by acid solution, neutralized with NaOH solution and then filtrated and dried. The mass fraction of scandium in solid is 2.09% with total scandium recovery efficiency of 97% above and enriched time of 328 compared with that in red mud. |
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