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Simulation Study on Transient Periodic Heat Transfer Behavior of Meniscus in Continuous Casting Mold

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Abstract

Properly coordinating the initial solidification and heat transfer behavior of the meniscus of the mold is crucial for stabilizing and improving the surface quality of continuous casting slabs. The study comprehensively considers the geometric, contact, and motion characteristics of the meniscus under mold periodic oscillation, and develops a three-dimensional numerical model that couples the heat transfer of molten steel, shell solidification, and multiphase flow. The transient periodic heat transfer behavior of the meniscus in the mold is simulated and analyzed. The investigation begins with analyzing the distribution and variation of heat flux, and then focuses on analyzing the effects of steel level height, upper backflow, and thickness of mold flux on the formation of local high heat flux regions, periodic severe fluctuations, and sharp changes in corner heat flux. The transient variation and signal characteristics of heat flux near the meniscus are analyzed through Fast Fourier Transform (FFT) and Power Spectral Density (PSD). The analysis reveals that the high steel level with circulation is the main factor contributing to the formation of a local high heat flux zone. The flow patterns of molten steel and the uneven distribution of solid slag film can result in discontinuities in the region of sharp fluctuations. The variation of transient heat flux is affected by the relative motion between the initial solidified shell and the copper plate in the meniscus. The low-frequency heat flux is closely related to the melt flow fluctuations and the shell solidification, while the high-frequency heat flux is introduced by the mold oscillation. The signal difference of the heat flux near the meniscus is determined by its solidification rate and height. The results are beneficial for monitor the formation of initial solidification shell defects of the meniscus.

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Acknowledgments

The present work was financially supported by the National Natural Science Foundation of China under Nos. 51974056 and 51474047.

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The authors declare no conflict of interest.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, P.R. China

    Zi-Jian Wei, Xu-Dong Wang & Man Yao

  2. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), Dalian University of Technology, Dalian, 116024, P.R. China

    Zi-Jian Wei, Xu-Dong Wang & Man Yao

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  1. Zi-Jian Wei
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  2. Xu-Dong Wang
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Correspondence to Man Yao.

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Wei, ZJ., Wang, XD. & Yao, M. Simulation Study on Transient Periodic Heat Transfer Behavior of Meniscus in Continuous Casting Mold. Metall Mater Trans B 54, 3164–3179 (2023). https://doi.org/10.1007/s11663-023-02899-x

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