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| Effect of NaOH Molten Roasting on Vanadium Extraction from Black Shale |
| Received:September 26, 2017 Revised:September 28, 2017 |
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| DOI：10.3969/j.issn.1007-7545.2018.03.008 |
| KeyWord:black shale; vanadium; NaOH molten roasting; water leaching |
| Author | Institution |
| Jian Xingwen |
武汉科技大学 资源与环境工程学院 |
| Huang Jing |
武汉科技大学 资源与环境工程学院 |
| Zhang Yimin |
武汉科技大学 资源与环境工程学院 |
| Cai Zhenlei |
武汉科技大学 资源与环境工程学院 |
| Liu Hong |
武汉科技大学 资源与环境工程学院 |
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| Abstract: |
| Effects of mass ratio of alkaline to ore, roasting temperature and time, leaching temperature and time, and L/S on vanadium leaching rate from black shale were investigated by NaOH molten roasting and water leaching. The results show that vanadium leaching rate is 84.63% under the optimum conditions including mass ratio of alkaline to ore of 1︰1 (g/g), roasting at 500 ℃ for 60 min, leaching temperature of 60 ℃, leaching time of 60 min, and L/S of 4.0 (mL/g). Participation of NaOH in decomposition of vanadium-bearing mica during roasting reduces Gibbs Free Energy of decomposition reaction of mica. As a result, damage of mica structure is intensified, and release of vanadium from mica lattice is strengthened. Meanwhile, participation of NaOH in chemical reaction promotes further dissolution of vanadium. |
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