Distribution and motion behavior of desulfurizer particles in hot metal with mechanical stirring

He, Meile; Wang, Nan; Chen, Ming; Chen, Min; Li, Chuanfu

doi:10.1016/j.powtec.2019.05.056

Cited by 21 publications

(12 citation statements)

References 18 publications

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“…To understand the effect of impeller design on the refining process and optimally conduct it in an industrial application, some studies have been done. [5][6][7][8][9][10][11][12][13][14][15][16][17][17][18][19][20][21][22][23][24][25][26][27][28] Visuri et al [20] have given a comprehensive review in hot metal desulfurization and particularly summarized the previous contributions and work in progress on KRs. Song et al [21] conducted a particle image velocimetry (PIV) measurement to investigate the flow pattern induced by a 30-degree pitched paddle impeller for an aluminum-melting furnace.…”

Section: Introductionmentioning

confidence: 99%

Computational Investigation on Effect of Impeller Dimension on Fluid Flow and Interface Behavior for Kanbara Reactor Hot Metal Treatment

Shen

Guo

et al. 2021

steel research int.

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Kanbara Reactor (KR) is widely used for hot metal desulfurization pretreatment in the steelmaking industry. The configuration of its impeller plays a crucial role in the reactor performance, but its function is not fully understood. Herein, a 3D volume of fluid (VOF) model coupled with the sliding mesh technique is developed, and the performance of five impellers with different dimensions is investigated. After the test of grid dependency, the calibration of turbulent models, and the validation via experiments, the numerical model is applied to study the typical developing phenomena and the effect of impeller dimension on the fluid flow characteristics, mixing time, interface profile, and vortex core depth. The results show that the centrifugal discharging flow extruded by the rotating impeller creates a double‐recirculation flow pattern in the axial direction. When the aspect ratio χ of the impeller increases, the upper recirculating region is successively strengthened and enlarged. Furthermore, the mixing time as a function of impeller configuration exists a minimum value. Impeller III is the optimal configuration in the current study. In addition, the relationship between vortex core depth and χ is obtained, and the velocity of the gas–liquid interface increases with the increase in χ.

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Section: Introductionmentioning

confidence: 99%

Computational Investigation on Effect of Impeller Dimension on Fluid Flow and Interface Behavior for Kanbara Reactor Hot Metal Treatment

Shen

Guo

et al. 2021

steel research int.

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“…2) The KR method has been explored by physical analog models and numerical simulations, which revealed its fluid flow patterns and particle motion behavior. [3][4][5][6][7][8][9][10][11] The dispersion of desulfurizing agent (DA) particles in the hot metal directly affects desulfurization efficiency. 11,12) To reduce the DA amount used per ton of hot metal, it is necessary to enhance the DA reaction efficiency.…”

Section: Powder Injection Effect On Hot Metal Desulfurization Behavior In the Kanbara Reactor: A Transient 3d Coupled Numerical Modelmentioning

confidence: 99%

Powder Injection Effect on Hot Metal Desulfurization Behavior in the Kanbara Reactor: a Transient 3D Coupled Numerical Model

Jia

De-gang

et al. 2022

ISIJ Int.

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“…They found that increasing rotation speed is conducive to the dispersion of droplets in the mechanical stirring vessel. Later, they [12] also investigated the dispersed behavior of desulfurization particles at different rotation speeds and found that rotation speed affects the liquid dispersion in the mechanical stirring vessel and has a noticeable effect on the distribution of particles in the hot metal. Li et al [13,14] used a Volume of Fluid with a dispersed particle model (VOF-DPM) to analyze the drawdown mechanism and the dispersion characteristic of light particles at different rotation speeds.…”

Section: Introductionmentioning

confidence: 99%

Effects of Impeller Rotational Speed and Immersion Depth on Flow Pattern, Mixing and Interface Characteristics for Kanbara Reactors Using VOF-SMM Simulations

Shen³

et al. 2021

Metals

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The Kanbara Reactor (KR) is a primary desulfurization technology in the hot metal pretreatment refining process that is widely employed in the modern steelmaking industry. The operating parameters of KR impeller immersion depth (IID) and rotation speed (IRS) have a crucial impact on the process performance and the desulfurization effect. Still, their influences have not been fully understood. This study systematically investigated the effects of IID and IRS on the flow pattern, mixing behavior, vortex core depth, and free surface characteristics for KR processes based on a 3D Volume of Fluid (VOF) model coupled with the sliding mesh method (SMM). The model was validated via scale-down water model experiments and then applied to the KR process, and simulations found that IID and IRS have different impacts on the flow pattern. Specifically, the discharge flow location moves downward with IID increasing, but the discharge strength and mean velocity hardly changes. Comparatively, the rise of IRS significantly increases the mean velocity, but few changes occur to the discharge flow position. Increasing IRS improves bath hydrodynamics, strengthens recirculation, and efficiently shortens mixing time, but IID has a neglectable effect on these features. The minimum mixing time is 55 s at a maximum IRS of 260 rpm. Moreover, the vortex core depth and free surface velocity visibly increase with the increase of IRS. Comparatively, IID has a limited effect on the flow and mixing behavior but directly impacts the distribution of recirculation regions at the axial direction and the velocity gradient on the free surface at the radial direction. Furthermore, the correlation equations of these critical parameters as a function of the operating parameters were obtained. The results from this study may provide references for operating optimizations and industrial practices of KRs.

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Distribution and motion behavior of desulfurizer particles in hot metal with mechanical stirring

Cited by 21 publications

References 18 publications

Computational Investigation on Effect of Impeller Dimension on Fluid Flow and Interface Behavior for Kanbara Reactor Hot Metal Treatment

Computational Investigation on Effect of Impeller Dimension on Fluid Flow and Interface Behavior for Kanbara Reactor Hot Metal Treatment

Powder Injection Effect on Hot Metal Desulfurization Behavior in the Kanbara Reactor: a Transient 3D Coupled Numerical Model

Effects of Impeller Rotational Speed and Immersion Depth on Flow Pattern, Mixing and Interface Characteristics for Kanbara Reactors Using VOF-SMM Simulations

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