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| Thermodynamics Analysis of Chlorination Volatilization Enrichment Process of Black Shale |
| Received:November 07, 2017 Revised:November 13, 2017 |
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| DOI：doi：10.3969/j.issn.1007-7545.2018.05.012 |
| KeyWord:black shale; vanadium extraction; chlorination volatilization; chlorination agent; thermodynamics |
| Author | Institution |
| wan junying |
武汉科技大学资源与环境工程学院，湖北省页岩钒资源高效清洁利用工程技术研究中心，钒铁国际合作基地 |
| chen tiejun |
钒铁国际合作基地;武汉科技大学资源与环境工程学院 |
| han jun |
钒铁国际合作基地;武汉科技大学资源与环境工程学院 |
| feng yang |
武汉科技大学资源与环境工程学院，湖北省页岩钒资源高效清洁利用工程技术研究中心，钒铁国际合作基地 |
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| Abstract: |
| Thermodynamic equilibrium calculations were performed in order to determine volatilization enrichment process of black shale and sodium chloride, calcium chloride or ferric chloride. The results indicate that vanadium oxide can be effectively enriched by chlorination and volatilization via direct chlorination of V2O4 and V2O5 by ferric chloride and indirect chlorination reaction of V2O3, V2O4 and V2O5 by chlorine produced by ferric chloride dissociation, and the extent of these reactions rise with increase of temperature. Fe2O3, Al2O3 and SiO2 cannot be chlorinated in process of high temperature roasting. Complexity of chlorination of oxides in black shale is in sequence of K2O, Na2O, CaO, V2O3, V2O4, V2O5, and MgO. V can be effectively separated from metal impurities such as Fe, Al, K, Na, Ca and Mg by controlling roasting temperature of chloridizing volatilization. |
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