PREDICTION OF PRODUCT SIZE DISTRIBUTIONS FOR A STIRRED BALL MILL

Simulation of the ultra-fine grinding process is a formidable task, at tended to by many researchers using models from conventional ball mill grinding. It has been realised that the first-order breakage hypothes is is not valid in fine grinding and that the process mechanism differ s substantially from that for ball mills. In this paper, the differenc e between ball mill grinding and stirred ball milling is discussed. A size-energy model is proposed for simulation of stirred ball milling. The product size distributions below 10 mu m from a stirred ball mill were simulated by the model satisfactorily. The model is simple and ha s only two parameters. The model was tested under different milling co nditions for a stirred ball mill.