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| Relevant Research on Sulfuric Acid Leaching of V, K and Mg from Vanadium-bearing Stone Coal |
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Received:June 11, 2014
Revised:June 19, 2014
Accepted:June 20, 2014
Published Online:October 15, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.11.009 |
| KeyWord:stone coal; sulfuric acid leaching; vanadium; potassium; magnesium; correlation |
| Author | Institution |
| Jiang Moufeng |
武汉理工大学资源与环境工程学院 |
| Zhang Yimin |
武汉理工大学资源与环境工程学院 |
| Bao Shenxu |
武汉理工大学资源与环境工程学院 |
| Yang Xiao |
武汉理工大学资源与环境工程学院 |
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| Abstract: |
| Relevancy of V, K and Mg in sulfuric acid leaching process was investigated to uncover leaching mechanism of vanadium for mica-type vanadium-bearing stone coal. The results show that V, K and Mg have close symbiotic relationship in mica mine, with part of magnesium occurring in calcite. At low temperature, both vanadium-potassium and vanadium-magnesium show a poor leaching correlation, and leaching of dissociative high valence vanadium is prevailing. At high temperature, both vanadium-potassium and vanadium-magnesium present a good leaching correlation, and leaching of low valence vanadium trapped in lattice is prevailing. Concentration of sulfuric acid has less effect on relevancy of V, K and Mg, and both vanadium-potassium and vanadium-magnesium have a good leaching correlation under different concentration of sulfuric acid at 95 ℃. Under the same condition, leaching rate of magnesium is higher than that of potassium and vanadium due to a faster dissolution rate of magnesium-bearing calcite in sulfuric acid. |
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