Experimental Study on Vanadium Extraction by Oxidation Calcification Roasting and Acid Leaching of Vanadium-Chromium Slag AITranslate
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The oxidation calcification roasting process of vanadium-chromium slag was theoretically analyzed based on the calculation of reaction Gibbs free energy.The results show that the formation of calcium vanadate has more thermodynamic advantages than the formation of calcium chromate during oxidation calcification roasting of vanadium-chromium slag.Vanadium can be preferentially extracted to achieve separation of V and Cr by controlling certain process conditions.Based on orthogonal experimental study of oxidation calcification roasting and acid leaching of vanadium-chromium slag,the effects were discussed of calcification time,oxidation time,calcium ratio and calcination temperature on the leaching rate of V and Cr.The results show that the influence factors of vanadium leaching rate have the following primary and secondary order：calcium ratio〉roasting temperature〉calcification time〉oxidation time.The effects of calcium ratio and roasting temperature on the leaching rate of V and Cr were investigated further by single factor experiments.The results show that the optimal leaching conditions for preferentially extracting vanadium are as follows：roasting temperature of 1 000℃,calcium ratio of 1.2,oxidation time of 2 hand calcification time of2 h.Under the optimal conditions,the leaching rates of vanadium and chromium are 85.76% and 14.61%,respectively.
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DOI：
Chinese Library Classification Number:TF841.3[冶金工程—有色金属冶金]
Citation Information:
The oxidation calcification roasting process of vanadium-chromium slag was theoretically analyzed based on the calculation of reaction Gibbs free energy.The results show that the formation of calcium vanadate has more thermodynamic advantages than the formation of calcium chromate during oxidation calcification roasting of vanadium-chromium slag.Vanadium can be preferentially extracted to achieve separation of V and Cr by controlling certain process conditions.Based on orthogonal experimental study of oxidation calcification roasting and acid leaching of vanadium-chromium slag,the effects were discussed of calcification time,oxidation time,calcium ratio and calcination temperature on the leaching rate of V and Cr.The results show that the influence factors of vanadium leaching rate have the following primary and secondary order：calcium ratio〉roasting temperature〉calcification time〉oxidation time.The effects of calcium ratio and roasting temperature on the leaching rate of V and Cr were investigated further by single factor experiments.The results show that the optimal leaching conditions for preferentially extracting vanadium are as follows：roasting temperature of 1 000℃,calcium ratio of 1.2,oxidation time of 2 hand calcification time of2 h.Under the optimal conditions,the leaching rates of vanadium and chromium are 85.76% and 14.61%,respectively.
quote
| GB/T 7714-2015 | [1] WU En-hui, HOU Jing, LI Jun. Experimental Study on Vanadium Extraction by Oxidation Calcification Roasting and Acid Leaching of Vanadium-Chromium Slag[J]. Rare Metals and Cemented Carbides, 2017(6): 8-13. |
| MLA | [1] WU En-hui, et al., "Experimental Study on Vanadium Extraction by Oxidation Calcification Roasting and Acid Leaching of Vanadium-Chromium Slag." Rare Metals and Cemented Carbides, no. 6, 2017, pp. 8-13. |
| APA | [1] WU En-hui, HOU Jing, & LI Jun. (2017). Experimental Study on Vanadium Extraction by Oxidation Calcification Roasting and Acid Leaching of Vanadium-Chromium Slag. Rare Metals and Cemented Carbides(6), 8-13. |
| IEEE | [1] WU En-hui, HOU Jing, and LI Jun, "Experimental Study on Vanadium Extraction by Oxidation Calcification Roasting and Acid Leaching of Vanadium-Chromium Slag," Rare Metals and Cemented Carbides, no. 6, pp. 8-13, 2017. keywords: {vanadium-chromium slag;oxidation roasting;calcification roasting;acid leaching;V;Cr;separation} |