Simulation of the Heat-Transfer Conditions in a CCM Mold

Dozhdikov, V. I.; Cherkasov, N. V.; Vasyutin, A. Yu.; Ganul, A. O.

doi:10.1007/s11015-022-01366-3

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…The unit is filled with liquid slag, and there is no steel liquid present. (2) 0 𝛼 1. The unit is a two-phase mixing zone.…”

Section: Vof Equationmentioning

confidence: 99%

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Analysis of Flow and Fluctuation Characteristics in Coated Slag Using a 2D Model in the Meniscus Region of Mold

Du,

Zeng,

Wang

et al. 2023

Coatings

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Steel is mainly produced through continuous casting; molten steel flows into the mold from the tundish, where it cools and then enters the secondary cooling zone, ultimately solidifying into a billet. During the continuous casting production process, the quality of the casting billet is mainly related to the lubrication state of the coated slag. In the upper part of the mold, the consumption of liquid protective slag directly affects the friction state of the initial solidified billet shell. Therefore, the flow and fluctuation characteristics of coated slag in the meniscus area are very important. There is limited research on the flow and fluctuation characteristics of coated slag in the meniscus area, and little consideration has been given to the shape of the meniscus. In this work, a two-dimensional numerical model for the flow and fluctuation of coated slag in the meniscus region was established, and the transient flow velocity of protective slag and molten steel at each moment of the vibration cycle was obtained, as well as the fluctuation of the slag/steel interface in the meniscus region. The results show that when the surface mold vibrated upwards, the protective slag in the meniscus area flowed clockwise. When the mold moved downwards, the protective slag in the slag pool generated a counterclockwise flow vortex. When the mold was in a positive slip state, the negative pressure formed by the upward flow of the protective slag on the meniscus and the inertia force of steel liquid pushed the meniscus toward the inner wall of the mold. During negative slip, the flow of coated slag generated positive pressure on the slag/steel interface, pushing the meniscus toward the steel liquid, and at the initial moment of negative slip, the steel liquid overflowed into the slag channel. This model could provide a theoretical basis for the flow control of protective slag.

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“…The unit is filled with liquid slag, and there is no steel liquid present. (2) 0 𝛼 1. The unit is a two-phase mixing zone.…”

Section: Vof Equationmentioning

confidence: 99%

“…At the same time, the shape of the slag circle in the meniscus area also affects the inflow of protective slag. In continuous casting production, it is necessary to control the composition, physical parameters, and heat transfer performance of protective slag to control the formation and growth of the slag ring [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Flow and Fluctuation Characteristics in Coated Slag Using a 2D Model in the Meniscus Region of Mold

Du,

Zeng,

Wang

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Under normal continuous casting conditions, the thickness of the liquid slag layer needs to be controlled within a relatively stable range to balance the endothermic melting of the protective slag above the sintering layer with the downward inflow and continuous consumption of the liquid slag. Correctly understanding and regulating the complex heat transfer and flow state of protective slag is of great significance for stabilizing and improving the surface quality of continuous casting billets [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Flow and Heat Transfer on the Surface of Molten Steel Slag Layer in Continuous Casting Mold

Li,

Wang,

Zheng

2023

Coatings

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Protective slag is coated on the surface of molten steel during continuous casting, the flow and heat transfer state of the protective slag is a decisive factor affecting the inflow and consumption of liquid slag and is also an important prerequisite for stabilizing and improving the quality of continuous casting billets. Based on the Navier Stokes fluid momentum conservation equation and energy equation, a two-dimensional longitudinal numerical model describing the flow/heat transfer of liquid protective slag on the surface of steel is established. The data comes from the equipment parameters and casting process of an arc shaped slab continuous casting machine in a domestic steel plant. The flow field and temperature field distribution of protective slag are calculated and analyzed, and the effects of factors such as slag layer thickness and shear speed on the flow and heat transfer status of the liquid slag layer are discussed. When the bottom shear velocity increases from 0.005 m/s to 0.2 m/s, the maximum flow velocity of liquid slag from the nozzle to the narrow surface in the center area of the model increases from 0.0012 m/s to 0.0617 m/s, and the average longitudinal flow velocity of liquid slag near the nozzle increases from 0.0012 m/s to 0.0627 m/s. The research results provide reference for investigating the complex metallurgical behavior of protective slag.

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Simulation of the Heat-Transfer Conditions in a CCM Mold

Cited by 2 publications

References 2 publications

Analysis of Flow and Fluctuation Characteristics in Coated Slag Using a 2D Model in the Meniscus Region of Mold

Analysis of Flow and Fluctuation Characteristics in Coated Slag Using a 2D Model in the Meniscus Region of Mold

Flow and Heat Transfer on the Surface of Molten Steel Slag Layer in Continuous Casting Mold

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