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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received June 12, 2022
Accepted July 19, 2022
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Experimental and numerical simulation study on the hydrodynamic characteristics of spherical and irregular-shaped particles in a 3D liquid-fluidized bed

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China 1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
hanhai5086@csu.edu.cn
Korean Journal of Chemical Engineering, November 2022, 39(11), 3165-3176(12), 10.1007/s11814-022-1234-9
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Abstract

Recently, the fluidized bed has been shown to assist in improving the recovery of coarse minerals during flotation. In this study, the fluidization characteristics of spherical and irregular particles in a three-dimensional liquidsolid fluidized bed were studied by combining experimental and computational fluid dynamics (CFD) methods. Fluidization experiments were performed to investigate the effect of superficial velocity, particle shape, and particle size on solid holdup and bed expansion height. CFD model coupled different drag models for spherical and irregular particles were developed and validated by the experimental data of bed expansion ratio and pressure drop. Based on 3D CFD simulations, the axial and radial direction distributions of solid holdup, axial velocity, as well as granular temperature were obtained. Their distribution characteristics were analyzed and discussed in detail. The reported experimental data and simulation results can improve the understanding of irregular granular liquid-solid fluidized bed and provide a basis for further research on fluidized bed flotation.

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