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| Effect of Impurities on Vanadium Purification from Acid Leaching Solution of Stone Coal with Solvent Extraction Process |
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Received:November 16, 2012
Revised:November 25, 2012
Accepted:November 26, 2012
Published Online:April 23, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.05.008 |
| KeyWord:vanadium; stone coal; solvent extraction; acid leaching solution; iron |
| Author | Institution |
| Li Wang |
武汉科技大学,资源与环境工程学院 |
| Zhang Yi-min |
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 |
| Huang Jing |
武汉科技大学,资源与环境工程学院 |
| Wang Yi |
武汉科技大学,资源与环境工程学院 |
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| Abstract: |
| Stone coal was roasted and sulfuric acid leached. Separation of vanadium from the vanadium containing solution with impurities of Fe3 , Fe2 , Al3 and Mg2 was conducted through solvent extraction process with D2EHPA and TBP as extractant and sulfonated kerosene as diluent. The effects of impurities on vanadium extraction rate are discussed. The results show that extraction ratio of V4 is higher than that of V5 , and Fe3 has a negative effect on extraction ratio of V4 when its mass concentration exceeds 5 g/L. The co-extraction ratios of Al3 and Mg2 markedly decrease when their mass concentrations are lower than 10 g/L. Extraction experiments with D2EHPA indicates that 99% of V4 can be extracted from the real leaching solution after reduction process, leaving most of Fe2 , Al3 and Mg2 in raffinate. The extracted Fe2 remains in the stripped organic phase, and Al3 and Mg2 remain in the waste water of vanadium precipitation. Pure V2O5 can be obtained. |
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