Numerical Study on Desulfurization Behavior During Kanbara Reactor Hot Metal Treatment

Wang, Qiang; Jia, Shuyuan; Tan, Fangguan; Li, Guangqiang; De-gang, Ouyang; Zhu, Shanhe; Sun, Wei; He, Zhu

doi:10.1007/s11663-021-02080-2

Cited by 24 publications

(10 citation statements)

References 28 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%

“…The results showed that the center plane velocity and the volume flow rate of the impeller flow do not differ much for each type of impeller with the same power input. Wang et al [27] used a numerical simulation method to study the effect of size and DOI: 10.1002/srin. 202100239 Kanbara Reactor (KR) is widely used for hot metal desulfurization pretreatment in the steelmaking industry.…”

Section: Introductionmentioning

confidence: 99%

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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%

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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“…On the other hand, the reaction efficiency of DA particles grows with a decrease in the initial diameter of the DA particles because of the larger specific surface area. 14) Enhancing the degree of particle dispersion and avoiding particle aggregation is vital for improving the desulfurization efficiency. However, the decreased DA particle size increases the degree of particle escape.…”

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

confidence: 99%

“…The state of the hot metal flow at 100 rpm of the stirring impeller was stable. Recently, Wang et al 14) reported that the lance effect shifted the positions of the upper and lower vortex Impeller width (mm) 65…”

Section: Characterization Of Flow Fieldmentioning

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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“…Approaches used here can be classified into two categories: mechanically stirred and powder injection (PI). Among them, the Kanbara Reactor (KR) [3], as a typical mechanically stirred method (MSM) [4][5][6], has significant advantages with high efficiency, short treatment time, and lower cost, providing the intensely hydrodynamic conditions through the revolving motion of a submerged impeller. Practically, the rotational speed and immersion depth of the impeller, as two vital operating parameters, remarkably impact the entrainment of the reagent powder, mixing characteristics, and refining efficiency, as well as the service life of an impeller and the ladle because of higher refractory wear induced by the washing of revolving, high-temperature metal.…”

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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Numerical Study on Desulfurization Behavior During Kanbara Reactor Hot Metal Treatment

Cited by 24 publications

References 28 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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