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Article

Effect of Mold Width on the Flow Field in a Slab Continuous-Casting Mold with High-Temperature Velocity Measurement and Numerical Simulation

1
State Key Laboratory of Advanced Special Steel, School of Material Science and Engineering, Shanghai University, Shanghai 200444, China
2
Steelmaking Department, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, China
3
Steelmaking Department, Tangshan Stainless Steel Co., Ltd., Tangshan 063000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Pasquale Cavaliere and Alexander McLean
Metals 2021, 11(12), 1943; https://doi.org/10.3390/met11121943
Received: 3 October 2021 / Revised: 25 November 2021 / Accepted: 28 November 2021 / Published: 1 December 2021
(This article belongs to the Special Issue Advances in Ironmaking and Steelmaking Processes)
In this paper, the effects of the width of the mold on the surface velocity, flow field pattern, turbulent kinetic energy distribution, and surface-level fluctuation in the mold were studied with measurement of the flow velocity near the surface of the mold at high temperature with the rod deflection method and numerical calculation with the standard k-ε model coupled with the discrete-phase model (DPM) model for automobile exposed panel production. Under the conditions of low fixed steel throughput of 2.2 ton/min, a nozzle immersion depth of 140 mm, and an argon gas flow rate of 4 L/min, as the width of the mold increases from 880 mm to 1050 mm and 1300 mm, the flow velocity near the surface of the mold decreases. The flow direction changes from the positive velocity with the mold widths of 880 mm and 1050 mm to the unstable velocity with the mold width of 1300 mm. The calculated results are in good agreement with the measured results. The turbulent kinetic energy near the submerged entry nozzle (SEN) gradually increases, and the risk of slag entrainment increases. Under the conditions of high fixed steel throughput of 3.5 ton/min, the SEN immersion depth of 160 mm, and the argon gas flow rate of 10 L/min, as the width of the mold increases from 1600 mm to 1800 mm and 2000 mm, the velocity near the mold surface decreases. The flow velocity at 1/4 of the surface of the mold is positive with the mold width of 1600 mm, while the velocities are negative with the widths of 1800 mm and 2000 mm. The calculated results are basically consistent with the measured results. The high turbulent kinetic energy area near the nozzle expands to a narrow wall, and the risk of slag entrainment is significantly increased. In both cases of low and high fixed steel throughput, the change rules of the flow field in the mold with the width are basically the same. The argon gas flow rate and the immersion depth of SEN should be adjusted reasonably to optimize the flow field in the mold with different widths under the same fixed steel throughput in the practical production. View Full-Text
Keywords: mold width; flow field in mold; high-temperature measurement; numerical simulation; surface velocity mold width; flow field in mold; high-temperature measurement; numerical simulation; surface velocity
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MDPI and ACS Style

Liu, J.-Q.; Yang, J.; Ma, C.; Guo, Y.; He, W.-Y.; Zhao, C.-L.; Jiang, R.-B.; Guo, Y.-T. Effect of Mold Width on the Flow Field in a Slab Continuous-Casting Mold with High-Temperature Velocity Measurement and Numerical Simulation. Metals 2021, 11, 1943. https://doi.org/10.3390/met11121943

AMA Style

Liu J-Q, Yang J, Ma C, Guo Y, He W-Y, Zhao C-L, Jiang R-B, Guo Y-T. Effect of Mold Width on the Flow Field in a Slab Continuous-Casting Mold with High-Temperature Velocity Measurement and Numerical Simulation. Metals. 2021; 11(12):1943. https://doi.org/10.3390/met11121943

Chicago/Turabian Style

Liu, Jian-Qiu, Jian Yang, Chao Ma, Yi Guo, Wen-Yuan He, Chang-Liang Zhao, Ren-Bo Jiang, and Yin-Tao Guo. 2021. "Effect of Mold Width on the Flow Field in a Slab Continuous-Casting Mold with High-Temperature Velocity Measurement and Numerical Simulation" Metals 11, no. 12: 1943. https://doi.org/10.3390/met11121943

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