Role of particle stiffness and inter-particle sliding friction in milling of particles

• Published in: Particuology Vol. 16; no. 5; pp. 54 - 59
• Main Authors: Khanal, Manoj, Jayasundara, Chandana T.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2014
• Subjects: DEM; Elastic modulus; Simulation; Sliding friction; 弹性模量; 滑动摩擦系数; 矿物颗粒; 硬度; 碰撞能量; 碰撞频率; 碾磨; 离散单元法; Elastic modulus; Simulation; DEM; Sliding friction
• ISSN: 1674-2001; 2210-4291
• DOI: 10.1016/j.partic.2014.04.003

Discrete element method （DEM） has been used to investigate the effects of particle elastic modulus and coefficient of inter-particle sliding friction on milling of mineral particles. An autogeneous mill of 600 mm diameter and 320 mm length with 14,500 particles has been selected for the simulation. Various mill performance parameters, for example, particle trajectories, collision frequency, collision energy and mill power have been evaluated to understand the effects of particle elastic modulus and inter-particle sliding friction during milling of particles. For the given model, it has been concluded that at high energy range, as the elastic modulus and particle sliding friction increase the energy dissipated among the particles increases. The collision frequency increases with the increase in elastic modulus, however, this trend is not clearly observed with increasing inter-particle sliding friction. The power draw of the mill increases with the increase in fraction of mill critical speed.