Abstract：To investigate the effect of key parameters on performance of tower mill,the motion of medias in stirred tank was simulated by the discrete element method. Effects of key parameters such as stirrer speed, stirrer diameter, helix angle,media filling rate on two work performance parameters grinding force and power consumption were researched. The results show that: in stirred tank, grinding force decreases gradually from the bottom. At the same height. Grinding force in annular area is the largest. Grinding force and power consumption increases when the diameter and speed of agitator, media filling rate increases, but the grinding force is reduced and the power consumption increases when the helix angle becomes larger.

Keywords: tower mill; work performance; discrete element method; key parameters