Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles

Quanhong Zhu; Hongzhong Li; Qingshan Zhu; Qingshan Huang

doi:10.1016/j.cjche.2017.12.011

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Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles

General reactor | Updated：2026-01-06

- Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles
- Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles
- 中国化学工程学报（英文版） 2018年第6期页码：1412-1422
- Affiliations：
  
  1. Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. 2 Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences,Qingdao,China,266101
  3. 3 University of Chinese Academy of Sciences,Beijing,China,100049
- Author bio：
- Funds：
  
  Supported by the National Natural Science Foundation of China (21325628), the Major Research Plan of the National Natural Science Foundation of China (91334108), and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (YZ201641).
- DOI：10.1016/j.cjche.2017.12.011
  中图分类号：
- 纸质出版：2018
- Accepted：
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Quanhong Zhu, Hongzhong Li, Qingshan Zhu, 等. Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles[J]. 中国化学工程学报（英文版）, 2018,(6):1412-1422.

Quanhong Zhu, Hongzhong Li, Qingshan Zhu, et al. Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles[J]. Chinese Journal of Chemical Engineering, 2018, (6): 1412-1422.
Quanhong Zhu, Hongzhong Li, Qingshan Zhu, 等. Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles[J]. 中国化学工程学报（英文版）, 2018,(6):1412-1422. DOI： 10.1016/j.cjche.2017.12.011.

Quanhong Zhu, Hongzhong Li, Qingshan Zhu, et al. Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles[J]. Chinese Journal of Chemical Engineering, 2018, (6): 1412-1422. DOI： 10.1016/j.cjche.2017.12.011.

摘要

Abstract

For the magnetized fluidized bed (MFB) with the binary mixture of Geldart-B magnetizable and nonmagnetizable particles

the magnetically induced segregation between these two kinds of particles occurs at high magnetic field intensities (H)

leading to the deterioration of the fluidization quality. The critical intensity (H

) above which such segregation commences varies with the gas velocity (U

). This work focuses on establishing a segregation model to theoretically derive the H

ms-

relationship. In a magnetic field

the magnetizable particles form agglomerates. The magnetically induced segregation in essence refers to the size segregation of the binary mixture of agglomerates and nonmagnetizable particles. Consequently

the segregation model was established in two steps:first

the size of agglomerates (d

) was calculated by the force balance model; then

the H

ms-

relationship was obtained by substituting the expression of d

into the basic size segregation model for binary mixtures. As per the force balance model

the cohesive and collision forces were 1-2 orders of magnitude greater than the other forces e

xerted on the agglomerates. Therefore

the balance between these two forces largely determined d

. The calculated d

increased with increasing H and decreasing U

agreeing qualitatively with the experimental observation. The calculated H

ms-

relationship agreed reasonably with the experimental data

indicating that the present segregation model could predict well the segregation behavior in the MFB with the binary mixture.

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