Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process

Xie Hong’en; Hu Peng; Zheng Kui; Zhu Fengxiang

doi:10.7513/j.issn.1004-7638.2022.02.017

Volume 43 Issue 2

May 2022

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Xie Hong’en, Hu Peng, Zheng Kui, Zhu Fengxiang. Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017

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Xie Hong’en, Hu Peng, Zheng Kui, Zhu Fengxiang. Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 107-117. doi: 10.7513/j.issn.1004-7638.2022.02.017

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Study on phase and chemical composition of V-Ti sinter during softening, melting and dripping process

doi: 10.7513/j.issn.1004-7638.2022.02.017

Xie Hong’en^{1, 2
,},
Hu Peng^{1, 2},
Zheng Kui^{1, 2},
Zhu Fengxiang^{1, 2}

1.
Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China
2.
Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization，Panzhihua 617000, Sichuan, China

Received Date: 2021-06-28
Available Online: 2022-05-11
Publish Date: 2022-04-28

Abstract

Abstract

The charging mode of vanadium-bearing titanomagnetite concentrate is an important matter for optimizing the burden structure of blast furnace in Pangang, which also has an important influence on the migration of V and Ti in the process of softening and melting process and the formation of Ti(C,N). At present, vanadium-titanium sinter is the main burden of blast furnace in Pangang, and about half of vanadium-bearing titanomagnetite concentrate enters the blast furnace through sinter. Therefore, the change of phase and chemical composition of vanadium-titanium sinter in the process of softening and melting process was studied. In the softening and dripping process of sinter, Ti, V, Si, Mg, and Al gradually migrate from the phases of titanohematite, titanomagnetite, calcium ferrite to the slag phase, and the slag absorbs the sulfur and ash of coke. The mass fraction of Ti, Si, S and C in hot metal has reached or even exceeded that of normal production. Although the mass fraction of V is much lower than that in normal production, the yield in metallic iron is much higher than that of Ti, Si and S. The main phase of slag after cooling is melilite, followed by perovskite and pyroxene. Ti and V mainly exist in perovskite, followed by melilite and pyroxene. In the process of softening, little titanium carbonitride is produced. However, in the process of melting, the content of titanium carbonitride in slag increases significantly.
- vanadium-titanium sinter,
- softening and smelting process,
- dripping process,
- phase composition,
- chemical composition

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References(23)

References

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