Simple measurement of restitution coefficient of irregular particles--颗粒学报PARTICUOLOGY

Li, T., Zhang, J., & Ge, W. (2004). Simple measurement of restitution coefficient of irregular particles. China Particuology, 2(6), 274-275. https://doi.org/10.1016/S1672-2515(07)60074-8

Simple measurement of restitution coefficient of irregular particles

Tinghua Li, Jiayuan Zhang, Wei Ge ^*

Multi-Phase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, P. R. China

10.1016/S1672-2515(07)60074-8

Volume 2, Issue 6, December 2004, Pages 274-275

Received 27 April 2004, Accepted 23 November 2004, Available online 27 November 2007.

E-mail: wge@home.ipe.ac.cn

Highlights

Abstract

Restitution is an important physical and mechanical property of granular materials. However, measuring its values in instantaneous collisions between particles is very difficult, especially for ore particles of irregular shapes. In this paper, restitution is measured indirectly and statistically with two cameras recording from different angles the trajectories of the ore particles rebounding from a steel plate. The momenta of the particles prior to and after the collision are calculated from the trajectories to give the restitutions of these collisions. The restitution between ore particles is then derived from the restitution of a steel ball with the steel plate measured in the same way. The approach has been proved to be practical and reliable for a variety of ore particles with moderate restitutions.

Graphical abstract

Keywords

granular material; ore; restitution; measurement

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