3D Transient Heat Transfer Simulation and Optimization for Initial Stage of Steel Continuous Casting Process

Yang, Jian; Xie, Zhi; Meng, Hongji; Hu, Zhiheng; Liu, Wenhong; Ji, Zhenping

doi:10.2355/isijinternational.isijint-2022-479

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…Theoretically, a model to describe such a process should be tridimensional; in this case, the computational cost, both in terms of resources as well as time needed to obtain the results, is significant (examples of 3D modeling applied to metal casting processes are found in refs. [1,2]). To overcome these issues, a faster bidimensional approach named travelling slice was developed and is now utilized frequently.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Bazzaro,

De Bona

2023

Metals

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It is critical in the metal continuous casting process to estimate the temperature evolution of the casted section along the machine from the meniscus (the point where liquid metal is poured) to the cutting machine, where the product is cut to commercial length. A convenient approximated model to achieve this goal with a feasible computational effort, particularly in the case of large sections, is the so-called travelling slice: the transversal section of casted product is subjected to different thermal boundary conditions (e.g., thermal flux, radiation, convection) that are found during the movement at constant speed from meniscus to the end of machine. In this work, the results obtained with the approximated travelling slice model are analyzed in the favorable case of an axisymmetric section. In this case, the reference model is 2D, whereas the travelling slice model degenerates in a simple 1D model. Three different casted shapes were investigated, rounds with diameters of 200 mm, 850 mm, and 1200 mm, spanning from traditional to only recently adopted product diameter sizes. To properly test the validity of the travelling slice model, other casting speeds were considered, even outside the industrial range. Results demonstrate the advantage of using the travelling slice, particularly the much lower computational cost without sacrificing precision, even at low casting speed and large dimensions.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Bazzaro,

De Bona

2023

Metals

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Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Bazzaro¹,

Bona²

2023

Preprint

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In metal continuous casting process is important to estimate the temperature evolution of casted section along machine from meniscus (point in which liquid metal is poured) to cutting machine where product is cut at commercial length. Particularly in the case of large sections, a convenient approximated model to achieve this goal with a feasible computational effort, is the so called travelling slice: the transversal section of casted product is subjected to different thermal boundary conditions (e.g. thermal flux, radiation, convection) that are found during the movement at constant speed from meniscus to the end of machine. In the case of an axisymmetric section, a comparison with the exact solution can be easily achieved. The article will show pros and cons of both, namely the far lower computational cost of travelling slice model without losing precision. Results confirm the validity of the travelling slice approach also at low casting speed and huge dimensions.

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Rapid Identification of Liquid Steel Temperature in Tundish Based on Blackbody Cavity Sensor

Ma,

Meng,

Liu

et al. 2024

ISIJ Int.

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In the continuous casting process, the temperature of liquid steel in tundish determines the casting speed and secondary cooling conditions, and then influences the billet quality. It's very important to measure the temperature of liquid steel in tundish quickly and accurately. However, the initial response lag of blackbody cavity sensor is inevitable since the time is required for the sensor inner wall and the liquid steel reaching thermal equilibrium by heat transfer. In this paper, in order to eliminate the initial response lag of sensor, a heat transfer model of sensor is established. The heat transfer characteristics and cavity integral emissivity of sensor with different depths immersed into liquid steel are analyzed. The analytical solution of sensor temperature is derived by separation of variables method and superposition principle, and is verified by the actual temperature measurement data. Then an innovative method of liquid steel temperature rapid identification is deduced and validated by the actual measurement data. The results show that the initial response lag of sensor is greatly shortened and the temperature measurement efficiency is improved. This study provides a theoretical method for improving the initial response speed of sensor.

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3D Transient Heat Transfer Simulation and Optimization for Initial Stage of Steel Continuous Casting Process

Cited by 3 publications

References 28 publications

Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Effectiveness of Travelling Slice Modeling in Representing the Continuous Casting Process of Large Product Sections

Rapid Identification of Liquid Steel Temperature in Tundish Based on Blackbody Cavity Sensor

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