Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a computational particle fluid dynamics method

Xie, Chengming; Li, Rongbin; Wei, Qijin; Liu, Fengqin; Zhao, Hongliang; Zhang, Yongmin; Sohn, Hong Yong

doi:10.1016/j.partic.2023.12.007

Particuology

2024

DOI: 10.1016/j.partic.2023.12.007

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Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a computational particle fluid dynamics method

Chengming Xie,

Rongbin Li,

Qijin Wei

et al.

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2024

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Cited by 3 publications

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Mechanism of Directional Reduction Strengthening of Nickel Laterite Ore Under Fluidization Condition

Zheng,

Wang,

Qin

et al. 2024

Metall Mater Trans B

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Mechanism of Directional Reduction Strengthening of Nickel Laterite Ore Under Fluidization Condition

Zheng,

Wang,

Qin

et al. 2024

Metall Mater Trans B

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Numerical simulation of gas–solid flow behavior and heat transfer characteristics for suspension magnetization roasting: Effect of air inlet velocity

Tang,

Tian,

Gao

et al. 2024

Advanced Powder Technology

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CFD Study of Roasting Hydrodynamics in Fluidized Bed Roaster of Zinc Sulfide Concentrate

Bai,

Yang,

Yang

et al. 2024

Ind. Eng. Chem. Res.

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Fluidized bed roasters are widely employed in the zinc extraction process due to their superior roasting performance and high desulfurization efficiency. To examine the hydrodynamics of gas−solid flow and thermal characteristics within a fluidized bed roaster, the multiphase particle-in-cell (MP-PIC) method is utilized. Following validation of the numerical model, this study elucidates the distribution patterns of gas−solid flow and thermal parameters within the system, as well as the influence of various operational conditions. The results demonstrate that the vertical distribution of particle velocity within the roaster is characterized by higher velocities near the bed center and lower velocities near the wall. Elevated particle velocities are predominantly observed around bubble regions and in the wake vortex areas, reaching values of up to approximately 0.2 m/s. Furthermore, bubble dynamics are found to play a critical role in governing the gas−solid flow characteristics within the reactor. The particle Reynolds number and slip velocity increase markedly with higher superficial gas velocity, with peak values occurring at the gas inlet, bubble regions, and freeboard region.

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Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a computational particle fluid dynamics method

Cited by 3 publications

References 24 publications

Mechanism of Directional Reduction Strengthening of Nickel Laterite Ore Under Fluidization Condition

Mechanism of Directional Reduction Strengthening of Nickel Laterite Ore Under Fluidization Condition

Numerical simulation of gas–solid flow behavior and heat transfer characteristics for suspension magnetization roasting: Effect of air inlet velocity

CFD Study of Roasting Hydrodynamics in Fluidized Bed Roaster of Zinc Sulfide Concentrate

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