A Study of Intermix in a Six-Strand Billet Caster

Amorim, Laudinei L. C.; Silva, Carlos Antônio da; Resende, Alexandre D.; Silva, Itavahn A.; Oliveira, Marivaldo Júnior Monteiro de

doi:10.1007/s11661-018-4915-6

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Several studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] have developed models to predict the concentration of the mixed portion during different-grade continuous casting. Huang and Thomas 1) developed a threedimensional mathematical model for predicting concentration profiles of the final slab in different-grade continuous casting, and reported reasonable agreement between predicted and experimental concentration profiles in the slab centerlines.…”

Section: A Mixing Model Using Scale Factors For Prediction Of Intermi...mentioning

confidence: 99%

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A Mixing Model Using Scale Factors for Prediction of Intermixed Bloom Concentration of 0.4mass%C-0.2mass%Si-0.7mass%Mn Steel in Continuous Casting

Kim

You

2023

ISIJ Int.

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Section: A Mixing Model Using Scale Factors For Prediction Of Intermi...mentioning

confidence: 99%

“…( 7) and ( 8), respectively: The concentrations of molten steel in outflow from each flow region of the j-th strand are expressed as Eqs. ( 12) and (13), respectively:…”

Section: New Mixing Model Using Scale Factorsmentioning

confidence: 99%

A Mixing Model Using Scale Factors for Prediction of Intermixed Bloom Concentration of 0.4mass%C-0.2mass%Si-0.7mass%Mn Steel in Continuous Casting

Kim

You

2023

ISIJ Int.

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“…However, the unsteady casting phenomenon during ladle changeover should be discussed, which is an indispensable part in the process of grade change [10][11][12]. Studies have reported that the amount of residual volume in the tundish has a significant effect on steel mixing behaviour [13][14][15][16][17]. Krashnavtar et al [13] investigated the hydrodynamics and mixing phenomena in a tundish during the successive casting of two dissimilar grades of steel under a constant casting rate, and found that the mixing velocity increases with the decrease of residual steel, and the transient, turbulent volume of fluid (VOF) model in conjunction with the pressure correction scheme is sufficient to calculate the grade intermixing operation at a constant casting rate.…”

Section: Introductionmentioning

confidence: 99%

Effect of emptying time on multiphase and mixing behaviours during grade change of a five-strand bloom tundish

Zhang

Liu

Fang

et al. 2019

Ironmaking & Steelmaking

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The transient three-phase flow and steel mixing during the grade change of a five-strand bloom tundish under different emptying times (ETs) were numerically investigated. Water model experiments were conducted to verify the models. The results showed that the area of steel exposure first decreases with the increase of ET within 2.4 s of refilling time, and then deteriorates with the further increase of ET caused by the strong fluctuation of steel-slag interface. The exposed area tends to be stable when the refilling time is over 60 s, showing results of 50, 84 and 124 cm² when the ETs are 2, 3 and 4 min, which are substantially less than the exposed area of 310 cm² when the ET is 5 min. Meanwhile, the steel mixing time decreases with the increase of ET. The proper ET should be 4 min by comprehensively considering the steel exposure and mixing behaviours.

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Effect of flow control devices on grade change process in a five-strand Tundish

Zhang¹,

Fang²,

Liu³

et al. 2022

Metall. Res. Technol.

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A mathematical model was developed to investigate turbulent flows in steady-state casting and steel intermixing during grade change process in a five-strand tundish under different flow control devices (FCDs). The results showed that the baffle had significant influence on flow state of molten steel during steady-state casting, while the dam and turbulence inhibitor (TI) showed smaller effect. When the tundish was equipped with baffle, the mean residence time and the overall mean standard deviation of each strand decreased by nearly 100.3 s and 46%, the volume of the piston region and dead zone decreased by 13.5% and 6.4%, respectively, compared to without baffle. For grade change process, the baffle had great influence on the steel mixing, while the dam and TI showed less influence. The mass fraction of new grade reached 0.9 at 333 s near the third strand, and remained around 0.8 near the fifth strand at the later stage when the baffle was removed, which seriously deteriorated the steel mixing and the consistency among strands. The tundish equipped with baffle and square TI, but without dam, shows better performances both on flow consistency and new grade diffusion.

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A Study of Intermix in a Six-Strand Billet Caster

Cited by 4 publications

References 14 publications

A Mixing Model Using Scale Factors for Prediction of Intermixed Bloom Concentration of 0.4mass%C-0.2mass%Si-0.7mass%Mn Steel in Continuous Casting

A Mixing Model Using Scale Factors for Prediction of Intermixed Bloom Concentration of 0.4mass%C-0.2mass%Si-0.7mass%Mn Steel in Continuous Casting

Effect of emptying time on multiphase and mixing behaviours during grade change of a five-strand bloom tundish

Effect of flow control devices on grade change process in a five-strand Tundish

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