DEM 시뮬레이션을 이용한 교반 분쇄볼밀의 동력 계산

A simulation of the three-dimensional motion of grinding media in the stirred media mill for the research of grinding mechanism has been carried out by 3-dimensional Discrete Element Method (DEM). The power for the change of rotation speed of stirrer was examined based on the micro interactive forces at all the contact points between balls and between ball and stirrer. The results of DEM was compared with experimental measurements of power and showed similar power variation and force distribution which act on the stirrers of the mill. It could be also confirmed that DEM is a very powerful tool for the microanalysis of movement of balls, which has not been solved by conventional experimental method and for calculation of power of some mills which use balls as grinding media.