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| Study on Vanadium Leaching Mechanism from High Siliceous Stone Coal Vanadium Ore |
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Received:April 08, 2016
Revised:April 11, 2016
Accepted:April 12, 2016
Published Online:August 19, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.09.006 |
| KeyWord:high siliceous stone coal vanadium ore; sulfuric acid leaching; fluoride; leaching mechanism |
| Author | Institution |
| yinfei |
北京矿冶研究总院 |
| zouwei |
北京矿冶研究总院 |
| JIE Xiaowu |
北京矿冶研究总院 |
| ZHANH Yonglu |
北京矿冶研究总院 |
| WANG Zhenwen |
北京矿冶研究总院 |
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| Abstract: |
| Process mineralogy and leaching mechanism in sulfuric acid system of high siliceous stone coal vanadium ore were investigated. The results show that vanadium is difficult to be leached from schreyerite, vanadium-bearing rutile, and sulvanite by sulfuric acid with/without fluoride addition, while vanadium is easy to be leached from vanadate and vanadium limonite by sulfuric acid through destruction of its crystal structure by hydrogen ion. Vanadium leaching rate in sulfuric acid system with/without fluoride addition is 50% below and 90% above respectively. The intensified leaching mechanism of fluoride is to destroy Si-O bond in crystal structure of silicate minerals by complex ion formed from HF and F- under promotion of H3O . HF serves as catalyzer in leaching process. |
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