Title: Motion characteristics of coal-series kaolinite with different particle size influence

Authors: Bing-Sheng Hu; Hong Wang; Jun-Chao Song; Liang Wei; Shi-Song Yue; Jin-Xin Jia; Chang-Liang Shi

Addresses: Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' Tangshan Research Institute Co., Ltd., China Coal Technology and Engineering Group, Tangshan, Hebei, China; Hebei Province Coal Washing and Engineering Technology Research Centre, Tangshan, Hebei, China ' College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo Henan, China

Abstract: The gas-solid fluidisation separation of coal-series kaolinite has wide feed size, and the fluidisation characteristics of different particle size are different. The Computational Fluid Dynamics (CFD) and Discrete Element (DEM) coupling technology are proposed. Simulation results show that the pressure and kinetic energy characteristic in the separation area are conducive; the clear movement track mechanism of heavy products and light products of coarse particle size (50-75 mm), middle particle size (25-50 mm) and fine particle size (13-25 mm) are discussed respectively; also, the collection efficiency with different particle size are theoretically studied. It is found that the experimental yield has less error with the theoretical value of 2.5 g/cm³ heavy products, and the distribution state of the final heavy products is consistent with the actual separation.

Keywords: coal-series kaolinite; different particle size; flow field; movement track; collection efficiency; DEM simulation.

DOI: 10.1504/IJGEI.2021.117024

International Journal of Global Energy Issues, 2021 Vol.43 No.4, pp.327 - 339

Received: 29 Apr 2020
Accepted: 28 Sep 2020
Published online: 12 Aug 2021 *

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