DEM simulation of particle flow and separation in a vibrating flip-flow screen--颗粒学报PARTICUOLOGY

Yu, C., Lin, D., Xu, N., Wang, X., Pu, K., Wang, Z., . . . Gong, S. (2023). DEM simulation of particle flow and separation in a vibrating flip-flow screen. Particuology, 73, 113-127. https://doi.org/10.1016/j.partic.2022.03.009

DEM simulation of particle flow and separation in a vibrating flip-flow screen

Chi Yu ^a, Dongdong Lin ^a, Ningning Xu^a, Xinwen Wang ^a *, Kunwei Pu ^a, Zhenghao Wang ^a, Guofeng Zhao ^a, Runhui Geng ^a, Sanpeng Gong ^b *

a School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
b School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, 454003, China

10.1016/j.partic.2022.03.009

Volume 73, February 2023, Pages 113-127

Received 29 November 2021, Revised 7 March 2022, Accepted 29 March 2022, Available online 4 May 2022, Version of Record 24 May 2022.

E-mail: xinwen.w@cumtb.edu.cn; gongsp@hpu.edu.cn

Highlights

• Kinematic characteristics of elastic sieve mat in vibrating flip-flow screen were studied.

• Testing amplitude can be transformed into a function form by Fourier series.

• DEM simulation model of the motion of elastic sieve mat is realized.

• Flow and separation of particles in vibrating flip-flow screen were investigated.

Abstract

Vibrating flip-flow screens (VFFS) with stretchable polyurethane sieve mats have been widely used in screening fine-grained materials in recent years. In this work, the discrete element method (DEM) is used to study the screening process in VFFS to explain particle flow and separation behavior at the particle scale. Unlike traditional vibrating screens, for VFFS, the amplitude response of each point on the elastic sieve mat is different everywhere. This study measures the kinematics of the elastic sieve mat under different conditions such as different stretched lengths and material loads. To establish the elastic sieve mat model in a DEM simulation, the continuous elastic sieve mat is discretized into multiple units, and the displacement signal of each unit tested is analyzed by Fourier series. The Fourier series analysis results of each unit are used as the setting parameters for motion. In this way, the movement of the elastic sieve mat is approximately simulated, and a DEM model of VFFS is produced. Through the simulation, the flow and separation of different-sized particles in VFFS are studied, and the reasonability of the simulation is verified by a pilot-scale screening experiment. The present study demonstrates the potential of the DEM method for the analysis of screening processes in VFFS.

Graphical abstract

Keywords

Vibrating flip-flow screen; Kinematics of elastic sieve mat; Fourier series; Particle flow and separation; Screening performance

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