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| Technological Study of Niobium Leaching from Red Mud |
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Received:January 27, 2016
Revised:February 06, 2016
Accepted:February 14, 2016
Published Online:June 27, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.07.014 |
| KeyWord:red mud; leaching; niobium; KOH |
| Author | Institution |
| SuHouXiang |
吕梁学院生命科学系 |
| WangZhongHui |
吕梁学院化学化工系 |
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| Abstract: |
| Alkaline leaching conditions of niobium-rich red mud from Bayer Process were investigated. The effects of particle size of red mud, KOH concentration, leaching temperature, and L/S on niobium leaching rate were investigated. The results show that niobium leaching rate is 85% above under the optimum conditions including particle size of -80 μm, KOH concentration of 6 mol/L, reaction temperature of 260 ℃, and L/S=6︰1. Leaching process of niobium by alkaline corresponds with model of contractibility and unreacted core is controlled by solid-membrane diffusion process. |
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