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Effect of MgO on Mineral Phase and Structure of Vanadium Slag

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TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings (TMS 2024)

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Abstract

In this paper, the main phase composition and morphological characteristics of the FeO–SiO2–V2O3–MgO–TiO2 vanadium slag system were investigated using high-temperature phase equilibrium experiments combined with X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) analysis and Raman spectroscopy. The results show that the vanadium slag is mainly composed of (Fe, Mg)V2O4, (Fe, Mg)2TiO4, (Fe, Mg)2SiO4, and MgSiO3. As the MgO content increases from 0 to 10.71%, V is always enriched in the spinel phase, and Mg is mainly enriched in the spinel and olivine phases, where the increase of Mg content causes a high-angle shift of the characteristic peak of the olivine phase on the XRD spectral peak. The increase of FeO/SiO2 (2, 3, 4, respectively) favors the growth of spinel size. A single Mg2SiO4 is generated with the increase of FeO/SiO2 in the high-magnesium vanadium slag. And the results suggest a network depolymerization effect of MgO.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51974047), the Natural Science Foundation of Chongqing, China (cstc2022ycjh-bgzxm0003), and the Large Instrument Foundation of Chongqing University (No. 202303150239).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Cancan Yu, Jinan Wang, Yiyu Qiu, Jiang Diao, Hongyi Li & Bing Xie

  2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing, 400044, China

    Cancan Yu, Jinan Wang, Yiyu Qiu, Jiang Diao, Hongyi Li & Bing Xie

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  1. Cancan Yu
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  2. Jinan Wang
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  3. Yiyu Qiu
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  4. Jiang Diao
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  5. Hongyi Li
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  6. Bing Xie
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Correspondence to Jiang Diao .

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    Yu, C., Wang, J., Qiu, Y., Diao, J., Li, H., Xie, B. (2024). Effect of MgO on Mineral Phase and Structure of Vanadium Slag. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_150

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