Transient Flow and Inclusion Removal in Gas Stirred Ladle during Teeming Process

Qu, Tianpeng; Jiang, Maofa; Liu, C.; Komizo, Yu Ichi

doi:10.1002/srin.201000016

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…Consequently, there are vortexes on both sides of the gas jet flow, and these vortexes are near the free surface. Some researchers [ 37 , 38 ] used the Euler–Euler approach to describe the fluid flow in the gas-stirred ladle and indicated that the width of the plume remained almost unchanged along the vertical direction. Such a result is different from the experimental result.…”

Section: Resultsmentioning

confidence: 99%

Two-Way PBM–Euler Model for Gas and Liquid Flow in the Ladle

et al. 2023

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Ladle metallurgy is an important steelmaking technology in high-quality steel production. The blowing of argon at the ladle bottom has been applied in ladle metallurgy for several decades. Until now, the issue of breakage and coalescence among bubbles was still far from being solved. In order to have a deep insight into the complex process of fluid flow in the gas-stirred ladle, the Euler–Euler model and population balance model (PBM) are coupled to investigate the complex fluid flow in the gas-stirred ladle. Here, the Euler–Euler model is applied to predict the two-phase flow, and PBM is applied to predict the bubble and size distribution. The coalescence model, which considers turbulent eddy and bubble wake entrainment, is taken into account to determine the evolution of the bubble size. The numerical results show that if the mathematical model ignores the breakage of bubbles, the mathematical model gives the wrong bubble distribution. For bubble coalescence in the ladle, turbulent eddy coalescence is the main mode, and wake entrainment coalescence is the minor mode. Additionally, the number of the bubble-size group is a key parameter for describing the bubble behavior. The size group number 10 is recommended to predict the bubble-size distribution.

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Section: Resultsmentioning

confidence: 99%

Two-Way PBM–Euler Model for Gas and Liquid Flow in the Ladle

et al. 2023

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“…It mainly solves the mass and momentum conservation equations for each phase independently to analyze the macroscopic characteristics such as motion and distribution of each phase. [23][24][25][26] Euler-Euler is more suitable for engineering description of gas-liquid flow, because it has better tolerance to the grids number and time step, and better compatibility to coupled heat transfer, mass transfer and phase reaction [27][28][29][30][31][32][33] . Some researchers also use the Eulerian model to describe the inclusion removal [34][35][36][37][38][39] or desulfurization reaction [40][41][42][43][44] in the gas-stirred ladle.…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers also use the Eulerian model to describe the inclusion removal [34][35][36][37][38][39] or desulfurization reaction [40][41][42][43][44] in the gas-stirred ladle. However, it should be noted that the change of bubble size is not considered in these Euler-Euler models, and the bubble size is regarded as a constant, that is, the phenomenon of bubble breakup and coalescence is not considered [27][28][29][30][31][32][33][34][35][36][37][38][39] .…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Bubble Breakup and Coalescence Behavior in Gas-stirred Ladle

Lou,

Liang,

Wang

2023

ISIJ Int.

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A CFD-PBM coupled mathematical model was proposed to describe the bubble breakup and coalescence behavior in gas-stirred ladle based on the Eulerian-Eulerian approach. The effect of turbulence shear collision, bubble floating velocity difference collision and turbulence random collision on the bubble coalescence behavior were considered; the sensitivity of three typical breakup model including Luo model, Lehr model and Laakkonen model on bubble size distribution were considered. The result showed that the turbulence random collision and bubble floating velocity difference collision were the main mechanism to affect bubble coalescence behavior, while the effect of turbulence shear collision can be ignored. The bubble size distribution predicted by Lehr model was different with other two models and the measured data, because it highly predicted the bubble breakup frequency in current system. The effect of Luo model and Laakkonen model on bubble size distribution were so small that the bubble size distribution is mainly dominated by bubble coalescence behavior. Bubble-induced turbulence would affect the bubble breakup and coalescence behavior, it would promote the bubble coalescence behavior, the volume fraction of large bubbles increased significantly in this work. The size distribution predicted by the present model agree well with the measured data in the water model.

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“…They can also decrease the steel product quality. Owing to the important influence of ladle teeming on both the steel cleanness and temperature, it received a great deal of research efforts,1–20 which is illustrated in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Simulations of the Ladle Teeming Process and Verification With Pilot Experiment

Jonsson

Jönsson

2012

steel research int.

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The ladle teeming process was investigated by 2D axis-symmetrical mathematical models and a pilot-plant experiment. Different turbulence models, including the low Reynolds number k-e model and the realizable k-e model both with an enhanced wall treatment (EWT) and a standard wall function (SWF), were used to simulate this process. All of these turbulence model predictions generally agreed well with the experimental results. The velocity distributions in the nozzle were also predicted by these turbulence models. At the late stage of the teeming process, the drain sink flow phenomenon was studied. The combination of an inclined ladle bottom and a gradually expanding nozzle was found to be an effective way to alleviate a drain sink flow.

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Transient Flow and Inclusion Removal in Gas Stirred Ladle during Teeming Process

Cited by 7 publications

References 23 publications

Two-Way PBM–Euler Model for Gas and Liquid Flow in the Ladle

Two-Way PBM–Euler Model for Gas and Liquid Flow in the Ladle

Numerical Simulation of Bubble Breakup and Coalescence Behavior in Gas-stirred Ladle

Simulations of the Ladle Teeming Process and Verification With Pilot Experiment

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