A model for expansion ratio in liquid–solid fluidized beds--颗粒学报PARTICUOLOGY

Tripathy, A., Sahu, A. K., Biswal, S. K., & Mishra, B. K. (2013). A model for expansion ratio in liquid–solid fluidized beds. Particuology, 11(6), 789–792. https://doi.org/10.1016/j.partic.2012.11.006

A model for expansion ratio in liquid–solid fluidized beds

Alok Tripathy^*, A.K. Sahu, S.K. Biswal, B.K. Mishra

Council of Scientific and Industrial Research, Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India

10.1016/j.partic.2012.11.006

Volume 11, Issue 6, December 2013, Pages 789-792

Received 17 April 2012, Revised 24 October 2012, Accepted 17 November 2012, Available online 13 May 2013.

E-mail: altriatl@gmail.com

Highlights

• Expansion characteristics of liquid–solid fluidized bed were investigated.

• Effects of particle size, density and superficial velocity on fluidized bed expansion were studied.

• An empirical mathematical model was developed using dimensional analysis.

Abstract

Liquid–solid fluidized beds are used in mineral processing industries to separate particles based on particle size, density, and shape. Understanding the expanded fluidized bed is vital for accurately assessing its performance. Expansion characteristics of the fluidized bed were studied by performing several experiments with iron ore, chromite, quartz, and coal samples. Using water as liquid medium, experiments were conducted to study the effects of particle size, particle density, and superficial velocity on fluidized bed expansion. The experimental data were utilized to develop an empirical mathematical model based on dimensional analysis to estimate the expansion ratio of the fluidized bed in terms of particle characteristics, operating and design parameters. The predicted expansion ratio obtained from the mathematical model is in good agreement with the experimental data.

Graphical abstract

Keywords

Fluidization; Bed expansion; Mathematical modelling; Dimensional analysis; Particle processing; Void fraction

文章导读