Numerical Simulation on Bubble Behavior of Disintegration and Dispersion in Stirring-Injection Magnesium Desulfurization Process

Ji, Junhong; Liang, Ruquan; He, Jicheng

doi:10.2355/isijinternational.isijint-2016-511

Cited by 17 publications

(16 citation statements)

References 29 publications

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“…Various means to improve the fluid flow conditions have been studied using numerical modeling. As for the impeller, the studied aspects include the effect of the impeller geometry, the impeller depth, the impeller rotation rate, the variable impeller rotation rate, and the variable impeller rotation direction …”

Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

“…Their results indicate that the geometry of the impeller has a significant effect on the bubble dispersion and disintegration, gas–liquid mass transfer and power consumption. Ji et al coupled a Euler–Euler model with a bubble population model to study the bubble size distribution and the related break‐up and coalesce effects in a physical model of a KR. The results suggest that increasing the rotation speed of the impeller increased the bubble disintegration and dispersion in clockwise–anticlockwise and clockwise variable‐speed rotation modes .…”

Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

“…Ji et al coupled a Euler–Euler model with a bubble population model to study the bubble size distribution and the related break‐up and coalesce effects in a physical model of a KR. The results suggest that increasing the rotation speed of the impeller increased the bubble disintegration and dispersion in clockwise–anticlockwise and clockwise variable‐speed rotation modes . Increasing the gas flow rate was reported to be a disadvantageous way to increase the disintegration of bubbles as it worsened the hold‐up and bubble size distributions …”

Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

“…As for the impeller, the studied aspects include the effect of the impeller geometry, [158] the impeller depth, [54] the impeller rotation rate, [175] the variable impeller rotation rate, [53] and the variable impeller rotation direction. [172] Physical modeling has been applied successfully to study the liquid-liquid mixing patterns [168] and related mass transfer in mechanically stirred ladles. [169,170] As shown in Figure 8, Horiuchi et al [168] suggested that there are three types of mixing patterns in a mechanically stirred ladle: Region I: no dispersion of liquid phases; Region II: the vortex of the top phase reaches the impeller position and begins to disperse; Region III: both the top phase and the gas phase reach the impeller position and heavy dispersion of the top phase occurs.…”

Section: Fluid Flow Field and Mixing Patternsmentioning

confidence: 99%

“…The results suggest that increasing the rotation speed of the impeller increased the bubble disintegration and dispersion in clockwise-anticlockwise and clockwise variable-speed rotation modes. [172] Increasing the gas flow rate was reported to be a disadvantageous way to increase the disintegration of bubbles as it worsened the hold-up and bubble size distributions. [172]…”

Section: Bubble Dispersionmentioning

confidence: 99%

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A Review of Modeling Hot Metal Desulfurization

Visuri

Vuolio

Haas

et al. 2020

steel research int.

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Hot metal desulfurization serves as the main unit process for removing sulfur in blast‐furnace based steelmaking. The available body of literature on modeling hot metal desulfurization is reviewed to provide an in‐depth analysis of the approaches used and results obtained. The mathematical models for reaction kinetics have evolved from simplistic rate equations to more complex phenomenon‐based models that provide useful information on the effect of physico‐chemical properties and operating parameters on desulfurization efficiency. Data‐driven approaches with varying levels of phenomenological basis have also been proposed with the aim of achieving better predictive performance in industrial scale applications. Bath mixing has been studied using physical and numerical modeling to optimize mixing conditions in ladles and torpedo cars. The coupling of gas‐particle jets and their penetration into the liquid have been a focal point of physical and numerical modeling. In recent years, the fluid flow phenomena in mechanically stirred ladles has been studied extensively using physical and numerical modeling. These studies have focused on the fluid flow field, reagent dispersion, and bubble dispersion.

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Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

Section: Modeling Of Fluid Flow Phenomenamentioning

confidence: 99%

Section: Fluid Flow Field and Mixing Patternsmentioning

confidence: 99%

Section: Bubble Dispersionmentioning

confidence: 99%

See 3 more Smart Citations

A Review of Modeling Hot Metal Desulfurization

Visuri

Vuolio

Haas

et al. 2020

steel research int.

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Optimize the Operation Parameters in Surging Auxiliary Slag Skimming Process Based on Large Eddy Simulation –Volume of Fluid –Discrete Phase Model Coupled Model

Ji,

Li,

et al. 2023

steel research int.

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A transient 3D mathematical model is developed to study the surging auxiliary slag skimming process in molten iron ladle. A new mathematical model using the large eddy simulation is built for the gas–metal–slag three‐phase flow in the ladle. The Eulerian volume of fluid model is used for tracking the liquid–slag–air free surfaces, and the Lagrangian discrete phase model is used for describing the bubble movement. The procedure of bubble coming out of the liquid and getting into the air is modeled using a user‐defined function. The results show that optimizing the distance of the lance L and the injection volume Q can better the shape of the slag eye, increase the curvature radius of the slag eye on the side of the iron mouth, and broaden the area of the slag eye. At the same time, it can also improve the fluctuation of the slag layer and the liquid surface of molten iron, and reduce the splashing of molten iron and slag entrapment phenomenon, thus improving the slag skimming efficiency.

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