VALIDATION OF A MODEL OF A STIRRED BEAD MILL BY COMPARING RESULTS OBTAINED IN BATCH AND CONTINUOUS-MODE GRINDING

In this paper we present a generalization of the asymptotic solution o f the batch grinding equation proposed by Kapur in 1970. It is shown h ow this can be combined with the residence time distribution to give t he particle size distribution of the product of a continuous grinding process. The residence time distribution in a stirred bead mill has be en determined by tracer experiments and used to propose a flow model o f the mill. The results of batch grinding experiments of hydragillite are combined with this flow model to successfully predict the product size distribution in continuous grinding experiments.