Abstract
Magnesiation roasting-acid leaching is carried out to extract vanadium from high calcium and high phosphorus vanadium slag (HCPVS). The effects of roasting and leaching conditions on vanadium and phosphorus extraction are studied. In optimal conditions, the extraction efficiency of vanadium reaches 79.7%, and only 35.6% of phosphorus is leached owing to Mg2+ inhibiting the leaching of phosphorus. The roasting mechanism is analyzed by XRD and BSE-EDS systematically, best of the vanadium in V-spinel is converted into vanadate, and a small part of vanadium is dissolved into Ca2SiO4–Ca3(PO4)2 and CaTiO3 phase. This work reveals the influence mechanism of Ca2SiO4–Ca3(PO4)2 and CaTiO3 phase on vanadium extraction, providing new insights for vanadium extraction from HCPVS.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China [grant No. 52074050, 52222407]
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Chen, XM., Li, HY., Tan, J., Cheng, J., Diao, J., Xie, B. (2024). Extraction of Vanadium from High Calcium and High Phosphorus Vanadium Slag by Magnesiation Roasting-Acid Leaching. In: Forsberg, K., et al. Rare Metal Technology 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50236-1_42
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DOI: https://doi.org/10.1007/978-3-031-50236-1_42
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