Study on the effect of TFe on the physicochemical properties of molten vanadium slag

DU Changwu; CHEN Jun; CHEN Lian; FU Xinrui; WANG Lijun

doi:10.7513/j.issn.1004-7638.2026.01.004

Volume 47 Issue 1

Feb. 2026

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DU Changwu, CHEN Jun, CHEN Lian, FU Xinrui, WANG Lijun. Study on the effect of TFe on the physicochemical properties of molten vanadium slag[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 28-35. doi: 10.7513/j.issn.1004-7638.2026.01.004

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DU Changwu, CHEN Jun, CHEN Lian, FU Xinrui, WANG Lijun. Study on the effect of TFe on the physicochemical properties of molten vanadium slag[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(1): 28-35. doi: 10.7513/j.issn.1004-7638.2026.01.004

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Study on the effect of TFe on the physicochemical properties of molten vanadium slag

doi: 10.7513/j.issn.1004-7638.2026.01.004

DU Changwu^1
,,
CHEN Jun²,
CHEN Lian²,
FU Xinrui³,
WANG Lijun^{1, 4
,
,}

1.
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
2.
Pangang Group Research Institute Co., Ltd, Panzhihua 617000, Sichuan, China
3.
Pangang Group Xichang Steel & Vanadium Co., Ltd., Xichang 615000, Sichuan, China
4.
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

More Information

Received Date: 2025-03-20
Accepted Date: 2025-04-25
Rev Recd Date: 2025-04-14

Available Online: 2026-02-28

Publish Date: 2026-02-28

Abstract

Abstract

The viscosity and melting characteristics of the FeO-SiO₂-V₂O₃-TiO₂- MnO-CaO-MgO system were investigated by rotating column method and hemispherical method, and the influence of total iron content (TFe) on the physicochemical properties of vanadium slag melts was discussed. Combined with X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, the phase precipitation of vanadium slag at high temperatures and its relationship with viscosity and melting point were investigated. The results showed that with the increase of TFe content, the slag flow temperature decreased while the viscosity increased, and there was an obvious transition point of viscosity when temperature decreased. Above this critical temperature, TFe content had negligible effect on the viscosity of the slag, while below the transition temperature, the viscosity of the vanadium slag increased dramatically with the increase in TFe. At the vanadium extraction temperature of 1350 ℃, the precipitated phase of the slag was mainly a high melting point spinel phase, and the increase in TFe content promoted the precipitation of the spinel phase and the single particle became larger, resulting in a sudden increase in the viscosity of the melt as well as the melting temperature. The present work would provide a theoretical basis to some extent for optimizing the physical and chemical properties of vanadium slag.
- vanadium slag,
- spinel,
- TFe,
- viscosity,
- melting point

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References(17)

References

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