Flow Mechanism of Molten Steel in a Single-Strand Slab Caster Tundish Based on the Residence Time Distribution Curve and Data

Wang, Guocheng; Yun, Maofan; Zhang, Chongmin; Xiao, Guodong

doi:10.2355/isijinternational.55.984

Cited by 31 publications

(18 citation statements)

References 22 publications

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“…The coupling of the pressure and velocity fields were solved by the semi-implicit method for pressure-linked equations-consistent (SIMPLEC) algorithm. Furthermore, the residue levels were kept on a level at least 10 -3 , which was also adopted in the works [11,13,19]. Numerical simulations using turbulence models from the RANS group were performed in a steady-state.…”

Section: Methodsmentioning

confidence: 99%

Intensification of liquid steel active flow volume in one-strand tundish using a modified ladle shroud

Bartosiewicz

Cwudziński

2020

Metall Mater Eng

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This work presents the numerical and physical simulation results of the liquid steel flow in the one-strand tundish. The results obtained during the numerical simulations and the water modeling results were compared to each other. Six types of turbulence models were tested. Among tested turbulence models the BSL k-ω was turned out the best correlating with the results from the laboratory experiments. Besides, the ladle shroud modification was proposed by the authors and the influence of the modified ladle shroud immersion depth in the liquid steel on the hydrodynamic structure in the tundish was checked. The ladle shroud modification depended on the expansion, narrowing, and re-expansion of the liquid steel feed stream. The four tundish variants with the four different ladle shroud immersion depths (at 0.1, 0.2, 0.3 and 0.4 m) in the liquid steel were tested. The liquid steel flow volumes were calculated and according to the generated active flow volume, the most beneficial research case was indicated. The tundish variant with the ladle shroud immersion depth of 0.3 m in the liquid steel was characterized by the lowest stagnant flow volume. The numerical simulations were performed by using the Ansys-Fluent computer program.

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Section: Methodsmentioning

confidence: 99%

Intensification of liquid steel active flow volume in one-strand tundish using a modified ladle shroud

Bartosiewicz

Cwudziński

2020

Metall Mater Eng

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“…Different approaches are used and detailed in literature to minimize intermixing effects [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. They have been targeted at improving operating conditions and/or layout, even with suitable tools (e.g., particular ladle shroud geometry).…”

Section: Approachmentioning

confidence: 99%

Online tool based on Tundish steel CFD model to monitor and minimise steel intermix in CC slabs

Santis

Fera

et al. 2019

Matériaux & Techniques

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An online tool based on computational fluid dynamics modelling was developed, validated and applied to Colakoglu Metallurji 2-strands slab caster to monitor and manage steel intermixing in tundish at ladle change. The tool allows to reduce the length of the slabs with intermixed steel. Different tundish layout and operating conditions are accounted for as slab size, presence of flow modifiers in tundish, tundish refill time, casting speed (also different from strand to strand), steel grade. The tool was developed by CSM following the suggestions and needs of Colakoglu Metallurji, who provided to a successful validation of such tool, both with slab sampling and support for installation and testing. As a result, the tool has been integrated into the Colakoglu CC2 control system and is currently used offline for optimizing a priori mixed grade production scheduling, and online for slab cutting optimization in order to reduce the downgraded product amount.

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“…In addition to its traditional function of flow division, the tundish should also be utilized as a secondary refining reactor. To bring about suitable flow conditions for inclusions removal in the tundish, different flow control devices, such as weirs, dams, baffles, and turbulence inhibitors, have already been widely applied . These flow control devices can retain the liquid steel for a longer residence time in the tundish, and reduce the dead volume.…”

Section: Introductionmentioning

confidence: 99%

Motion and Removal of Inclusions in New Induction Heating Tundish

Xing

Zheng

Zhu

2018

steel research int.

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A new induction heating tundish with bent channels is presented as a solution to the lower efficiency of heating and inclusion removal in the traditional straight channels induction heating tundish. By Euler-Lagrange method, a three-dimensional unsteady-state mathematical model is built to compare the motion and the removal of inclusions in the two types of tundishes. In addition, the mathematical model for the inclusions collisiongrowth under the induction heating condition is also established based on the force balance. The results show that, compared with the traditional tundish, the turbulence intensity of liquid steel is higher in the channels of the new tundish and quite uniformly distributes in the discharging chamber. For those lower-sized inclusions smaller than 50 mm, the channels in the new tundish have a significantly higher inclusion removal rate than those in the traditional tundish, and the most inclusions absorbed by the channels of the traditional tundish are in the size range of 50-60 μm, while they are 50-60 μm and 60-70 μm for the new tundish. For each of the seven inclusion sizes, the removal rate of inclusions in the new tundish is quite higher than that in the traditional tundish. Compared to the traditional tundish, the inclusions removed in other areas in the new tundish are lower than those removed by the channels. When inclusions of all seven sizes are put into the two tundishes, the inclusions removal rate in the new tundish is also significantly higher than that in the traditional tundish. Under the same heating power, the new tundish is more efficient than the traditional tundish on inclusions removal.

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Flow Mechanism of Molten Steel in a Single-Strand Slab Caster Tundish Based on the Residence Time Distribution Curve and Data

Cited by 31 publications

References 22 publications

Intensification of liquid steel active flow volume in one-strand tundish using a modified ladle shroud

Intensification of liquid steel active flow volume in one-strand tundish using a modified ladle shroud

Online tool based on Tundish steel CFD model to monitor and minimise steel intermix in CC slabs

Motion and Removal of Inclusions in New Induction Heating Tundish

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