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Volume 31 Issue 9
Sep.  2024

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Junjie Shi, Yumo Zhai, Yuchao Qiu, Changle Hou, Jingjing Dong, Maoxi Yao, Haolun Li, Yongrong Zhou,  and Jianzhong Li, Phase equilibria relations in the V2O5-rich part of the Fe2O3–TiO2–V2O5 system at 1200°C related to converter vanadium-bearing slag, Int. J. Miner. Metall. Mater., 31(2024), No. 9, pp. 2017-2024. https://doi.org/10.1007/s12613-024-2845-4
Cite this article as:
Junjie Shi, Yumo Zhai, Yuchao Qiu, Changle Hou, Jingjing Dong, Maoxi Yao, Haolun Li, Yongrong Zhou,  and Jianzhong Li, Phase equilibria relations in the V2O5-rich part of the Fe2O3–TiO2–V2O5 system at 1200°C related to converter vanadium-bearing slag, Int. J. Miner. Metall. Mater., 31(2024), No. 9, pp. 2017-2024. https://doi.org/10.1007/s12613-024-2845-4
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研究论文

1200℃时Fe2O3–TiO2–V2O5体系富V2O5区域相平衡关系的研究


  • 通讯作者:

    石俊杰    E-mail: junjieshi@126.com

文章亮点

  • (1) 系统地研究了1200℃时空气气氛下Fe2O3–TiO2–V2O5体系相平衡关系。
  • (2) 确定了1200℃时空气气氛下铁、钛和钒的价态分别为3+、4+和5+。
  • (3) 明确了铁板钛矿固溶体内TiO2和V2O5含量随Fe2O3含量的变化趋势。
  • 从转炉含钒矿渣中有效回收金属钒对于可持续发展和循环经济具有重要意义。开发新型工艺和改进传统路线的关键在于获得准确的热力学数据。本研究采用高温平衡淬火技术,研究了Fe2O3–TiO2–V2O5体系在1200°C时空气气氛下中的平衡关系。通过扫描电子显微镜(SEM)-能量色散X射线光谱仪(EDS)和X射线光电子能谱(XPS)对样品进行了详细分析。研究结果表明,该体系中存在一个液相区、两个两相区(液相金红石和液相铁板钛矿)以及一个三相区(液相金红石铁板钛矿)。同时,研究了金红石和铁板钛矿固溶体中TiO2和V2O5含量随Fe2O3含量的变化情况。然而,在与FactSage 8.1的预测结果进行比较时,发现存在显著差异,这表明更新当前与含钒矿渣系统相关的热力学数据库具有十分重要的意义。
  • Research Article

    Phase equilibria relations in the V2O5-rich part of the Fe2O3–TiO2–V2O5 system at 1200°C related to converter vanadium-bearing slag

    + Author Affiliations
    • The efficient recycling of vanadium from converter vanadium-bearing slag is highly significant for sustainable development and circular economy. The key to developing novel processes and improving traditional routes lies in the thermodynamic data. In this study, the equilibrium phase relations for the Fe2O3–TiO2–V2O5 system at 1200°C in air were investigated using a high-temperature equilibrium-quenching technique, followed by analysis using scanning electron microscopy-energy dispersive X-ray spectrometer and X-ray photoelectron spectroscopy. One liquid-phase region, two two-phase regions (liquid–rutile and liquid–ferropseudobrookite), and one three-phase region (liquid–rutile–ferropseudobrookite) were determined. The variation in the TiO2 and V2O5 contents with the Fe2O3 content was examined for rutile and ferropseudobrookite solid solutions. However, on further comparison with the predictions of FactSage 8.1, significant discrepancies were identified, highlighting that greater attention must be paid to updating the current thermodynamic database related to vanadium-bearing slag systems.
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