Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills

Product fineness during grinding in stirred media mills is mainly influenced by the specific energy input, stress transferred colliding and frequency. The from collisions heterogeneously distributed mills. Herein, order to characterize distribution local collision frequencies, motion was calculated using discrete element method (DEM) simulations coupled with computational fluid dynamics (CFD). concentration, velocity profiles, energies were compared for varied total fillings stirrer speeds. It confirmed that normalized profile can be used divide chamber into four types of zones allow modeling distribution. However, frequency showed very different distributions velocities fillings.