Wet fine grinding with the attrition bead mill- optimisation and modelling of grinding

摘要

The effect of bead size, stirrer type and stirringspeed on the degree of grinding were studied experimentally inlaboratory scale with a batch and with a continuous attrition millto find grinding conditions where the net energy consumption ofgrinding would be minimised when the material is ground tosome certain particle size. Two different types of stirrers, anattritor and a disc stirrer, were studied by grinding threeminerals: limestone, FGD gypsum and phosphogypsum, withboth mills. Based on the completed experimental grinding tests asimulation model for attrition grinding has been developed.