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| Leaching Kinetics of Vanadium from Desiliconization Slag of Stone Coal |
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Received:January 13, 2012
Revised:January 13, 2012
Accepted:January 16, 2012
Published Online:May 31, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.06.001 |
| KeyWord:desiliconization slag of stone coal; vanadium; acid leaching; kinetics |
| Author | Institution |
| Zhang guo-fan |
中南大学 资源加工与生物工程学院 |
| Yan ji-wu |
中南大学 资源加工与生物工程学院 |
| Liu kun |
中南大学 资源加工与生物工程学院 |
| Long si-si |
中南大学 资源加工与生物工程学院 |
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| Abstract: |
| The leaching kinetic of vanadium was studied with the shrinking core model of liquid-solid multiphase reaction with the use of desiliconization slag of stone coal leached by alkali after melting and water quenching as raw material. The effects of leaching temperature and initial concentration of vitriolic acid on vanadium leaching rate were investigated. The results show that there are two stages in the leaching process, i.e. the quick leaching stage at the beginning of reaction and the slow leaching stage after 2 minutes. The kinetics of leaching in both the stages is controlled by diffusion through solid product layer, and the reaction activation energy is 13.88 kJ/mol. |
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