Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser

WANG Xingjuan; KONG Qichang; PIAO Zhanlong; ZHU Liguang; WEI Tianshuo

doi:10.7513/j.issn.1004-7638.2025.02.018

Volume 46 Issue 2

May 2025

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WANG Xingjuan, KONG Qichang, PIAO Zhanlong, ZHU Liguang, WEI Tianshuo. Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(2): 127-133. doi: 10.7513/j.issn.1004-7638.2025.02.018

Citation:

WANG Xingjuan, KONG Qichang, PIAO Zhanlong, ZHU Liguang, WEI Tianshuo. Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(2): 127-133. doi: 10.7513/j.issn.1004-7638.2025.02.018

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Numerical simulation of slag film distribution in protective slag of ER70-Ti steel crystalliser

doi: 10.7513/j.issn.1004-7638.2025.02.018

WANG Xingjuan^{1, 2
,},
KONG Qichang^{1, 2},
PIAO Zhanlong^{1, 2},
ZHU Liguang³,
WEI Tianshuo^{1, 2}

1.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Hebei High Quality Steel Continuous Casting Technology Innovation Centre, Tangshan 063000, Hebei, China
3.
College of Materials and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, Hebei, China

More Information

Received Date: 2024-04-02
Available Online: 2025-04-30
Publish Date: 2025-04-30

Abstract

Abstract

The CaO-Al₂O₃-TiO₂-based protective slag effectively solves the problem of serious slag interface reaction in the production of ER70-Ti steel, but it is still unknown whether a liquid/solid slag film with reasonable structure can be formed. In this study, the finite element software was used to establish a heat transfer model and a slag film heat transfer model for ER70-Ti steel, to analyse the changes of liquid/solid slag film in the crystallizer and to explore the influence of process parameters on the distribution of liquid slag film. The results show that the temperature of the slag film on the billet side ranges from 777.87 to
1113.3
℃ at the exit of the mould; the temperature of the slag film on the mould side is lower, ranging from 89.92 to 450.54 ℃. Along the direction of billet drawing, the thickness of liquid slag film decreases gradually, while the solid slag film thickens gradually, and the maximum thickness is up to 1.168 mm. The increase of drawing speed is conducive to the increase of the thickness of liquid slag film, and every increase of the drawing speed by 0.2 m/min, the liquid lubrication zone can be lengthened by an average of 40 mm. When the pouring temperature is increased from
1530
to
1550
℃, the thickness of the liquid slag film at the centre of the surface increases from 0.252 to 0.272 mm, and the liquid slag film thickness at the outlet of the crystalliser increased from 0 to 0.036 mm.
- ER70-Ti steel,
- solidification heat transfer,
- slag film structure,
- mathematical simulation

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References(15)

References

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