Analysis for Effects of Collision Velocity and Angle of Grinding Balls on Particle Grinding Behavior during Wet Ball Milling

Abstract

The simulation using the Advanced Discrete Element Method-Computational Fluid Dynamics (ADEM-CFD) model analyzed the motion and breakage behavior of particles during wet ball milling in order to investigate the effects of the collision velocity and angle between two grinding balls on the particle grinding behavior. The analyses showed that the particles were more damaged when the grinding balls collided with a faster collision velocity in closer to a normal collision direction. The degree of the particle damage was quantified by the release energy, which was defined with the potential energy released by breaking the internal bonds of the particles. The release energy was strongly related to the normal components of the impact energy calculated from the collision velocity between two grinding balls.