Study of orientation and morphology of elliptical particles in drum granulation by dynamic simulation--颗粒学报PARTICUOLOGY

Lin, Q., Chen, L., Feng, A., Li, Y., & Wang, X. (2016). Study of orientation and morphology of elliptical particles in drum granulation by dynamic simulation. Particuology, 25, 159-166. https://doi.org/10.1016/j.partic.2015.04.006

Study of orientation and morphology of elliptical particles in drum granulation by dynamic simulation

Qi Lin ^a, Lumin Chen ^a *, Ansheng Feng ^b, Yihao Li ^a, Xinjie Wang ^a

a School of Electromechanical Science and Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
b Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, & China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

10.1016/j.partic.2015.04.006

Volume 25, April 2016, Pages 159-166

Received 5 December 2014, Revised 12 February 2015, Accepted 23 April 2015, Available online 27 November 2015, Version of Record 18 February 2016.

E-mail: luminchen@zzuli.edu.cn

Highlights

• Dual-sphere particles were used to represent ellipsoidal particles in drum granulation simulation.

• Variations of particle position and orientation were calculated during simulation using DEM.

• Most dual-sphere particles had small orientation angles during drum granulation.

• Effect of particle oblateness on particle orientation angle distribution was studied.

Abstract

Sphericity is an important indicator of particle flow properties in rotary granulation. Here, a dynamic simulation approach is proposed to study the formation of particle sphericity during agglomeration by investigating both the orbit and attitude of non-spherical particles in a rotary drum. First, geometric criteria are presented to substitute a dual-sphere particle model for the commonly encountered ellipsoidal particle model assuming the long radius of the dual-sphere particle is equal to that of the ellipsoidal particle. Next, a discrete element method is applied to calculate the positions and orientations of dual-sphere particles during granulation. The relationship between shape and attitude in the dual-sphere model is then analyzed by comparing the obtained orientation angle–oblateness curves. A conclusion can be drawn that the particle orientation angle decreases with increasing particle oblateness within a certain range.

Graphical abstract

Keywords

Particle; Oblateness; Sphericity; Orientation; Attitude

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