Phase coexistence relationship of CaO-Al2O3-V2O5 slag system

Hao Guandi; Qiu Jiyu; Gong Henghui; Liu Yuan; Jiang Maofa

doi:10.7513/j.issn.1004-7638.2024.05.019

Volume 45 Issue 5

Oct. 2024

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Hao Guandi, Qiu Jiyu, Gong Henghui, Liu Yuan, Jiang Maofa. Phase coexistence relationship of CaO-Al2O3-V2O5 slag system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(5): 147-150. doi: 10.7513/j.issn.1004-7638.2024.05.019

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Hao Guandi, Qiu Jiyu, Gong Henghui, Liu Yuan, Jiang Maofa. Phase coexistence relationship of CaO-Al₂O₃-V₂O₅slag system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(5): 147-150. doi: 10.7513/j.issn.1004-7638.2024.05.019

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Phase coexistence relationship of CaO-Al₂O₃-V₂O₅slag system

doi: 10.7513/j.issn.1004-7638.2024.05.019

Hao Guandi^{1, 2
,},
Qiu Jiyu^{1, 2
,
,},
Gong Henghui^{1, 2},
Liu Yuan^{1, 2},
Jiang Maofa^{1, 2}

1.
Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
2.
Northeastern University School of Metallurgy, Shenyang 110004, Liaoning, China

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Received Date: 2023-01-17
Available Online: 2024-10-30
Publish Date: 2024-10-30

Abstract

Abstract

CaO-Al₂O₃-V₂O₅ slag system is a basic metallurgical slag system for denitrification of liquid steel. The lack of thermodynamic information, such as the phase equilibrium relationship, limits the research and development of related slag systems. In this paper, the phase equilibrium relationship of CaO-Al₂O₃-V₂O₅ slag system was studied through high temperature phase equilibrium experiment, combined with scanning electron microscope and energy spectrum analysis. According to the experimental results, the phase equilibrium relationship of CaO-Al₂O₃-V₂O₅ slag line at 1 600 ℃ in air atmosphere was determined, and the isothermal cross section of CaO-Al₂O₃-V₂O₅ slag line within the whole component range of the system is drawn, including 7 equilibrium phase regions, i.e., Liquid+Al₂O₃+CaAl₁₂O₁₉, Liquid+CaAl₁₂O₁₉+CaAl₄O₇, Liquid+CaO, Liquid+Al₂O₃, Liquid+ CaAl₁₂O₁₉, Liquid+CaAl₄O₇ and single liquid phase region. The determination of equilibrium phase regions between the above phases can realize the division of independent sub-systems of the phase diagram of the CaO-Al₂O₃-Ce₂O₃ slag system, and can also provide support for the subsequent high-temperature phase diagram drawing of the slag system.
- steelmaking,
- CaO-Al₂O₃-V₂O₅ slag system,
- phase,
- high temperature phase equilibrium experiment

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References(12)

References

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