Analysis of Grinding Rate Constant on a Stirred Ball Mill Using Discrete Element Method Simulation

The results of discrete element method simulation were compared with actual grinding experimental results. The grinding rate constant K can be expressed as K = a exp( bn ), where n is the rotation speed. To investigate the correlation between K and the simulation results, a new factor, the calculated force, was defined as F cal =average force acting on a ball coordination number. K could then be expressed as K = a ′ F cal + b ′ and is thus one‐dimensionally proportional to F cal K was found to be correlated with the forces acting on a ball and its contact points. Experimental results confirmed that F cal is suitable for use as a factor for expression of K .