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| Thermodynamics of Fluorine to Enhance Leaching of Vanadium from Stone Coal |
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Received:March 18, 2013
Revised:March 19, 2013
Accepted:March 20, 2013
Published Online:August 22, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.09.011 |
| KeyWord:vanadium; stone coal; calcium fluoride; leaching; thermodynamics |
| Author | Institution |
| WANG Fei |
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 |
| HUANG Jin |
武汉科技大学资源与环境工程学院 |
| LIU Tao |
武汉科技大学资源与环境工程学院 |
| ZHAO Jie |
武汉科技大学资源与环境工程学院 |
| ZHANG Guobin |
武汉科技大学资源与环境工程学院 |
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| Abstract: |
| Possible chemical reactions during direct leaching of vanadium from stone coal with calcium fluoride were discussed. The main vanadium-bearing mineral was phlogopite. The thermodynamics was analyzed and the leaching reaction model was established. The results show that the mechanism of calcium fluoride to enhance leaching of vanadium from stone coal is that reacting with aluminum and silicon fluorine generates AlF52- and SiF62- to decrease free energy of phlogopite breakage and facilitate dissolution of vanadium-bearing phlogopite. Phlogopite is broken step by step. |
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