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

石俊杰; 翟予茉; 邱玉超; 侯长乐; 董静静; 姚茂玺; 李昊伦; 周泳蓉; 李建中

doi:10.1007/s12613-024-2845-4

Volume 31 Issue 9

Sep. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(9): 2017-2024

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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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

1)
东北大学多金属共生矿生态化冶金教育部重点实验室，沈阳 110819，中国
2)
东北大学冶金学院，沈阳 110819，中国

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。

中文摘要

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。

关键词:

钒渣;
热力学;
FactSage;
相平衡;
回收

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

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Abstract

Abstract

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.
- vanadium-bearing slag;
- thermodynamics;
- FactSage;
- phase equilibria;
- recovery

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