Abstract
The widely applied methods to extract vanadium are sodium roasting and calcified roasting. However, these roasting methods have difficulties in recycling of wastewater and efficient utilization of leaching residue, which contains high concentration of sodium or calcium sulfate, due to the variety of roasting additives radically. Therefore, a novelty extraction medium by roasting with MgO and leaching with sulfuric acid was introduced in this study. The oxidation and roasting mechanism were systematically studied, providing a theoretical basis for industrial extraction of vanadium. The result shows that under the optimum conditions, the roasting temperature of 900 °C, the Mg/V molar ratio of 0.6, and the roasting time of 1.5 h, the leaching efficiency of vanadium is above 90%. In the processes, vanadium spinel is converted into Mg2V2O7 and Mn2V2O7.
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China [grant numbers 51474041, 51674051], Chongqing Science and Technology Bureau [grant number cstc2018jscx-mszdX0066], and Ministry of Education of China [grant numbers cqu2017hbrc1B08, 2019CDXYCL0031].
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Wang, C., Yuan, Y., Xie, B., Li, HY. (2020). Mechanism of Extraction of Vanadium from Vanadium Slag with MgO. In: Azimi, G., Forsberg, K., Ouchi, T., Kim, H., Alam, S., Baba, A. (eds) Rare Metal Technology 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36758-9_30
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DOI: https://doi.org/10.1007/978-3-030-36758-9_30
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