2014 Volume 57 Pages 51-58
Beads motion in a stirred mill having slurry was simulated by the Discrete Element Method (DEM), enabling to calculate the impact energy of beads. The impact energy of beads is known to be well correlated with the grinding rate constant, therefore, it was monitored as an effective index of grinding performance in the simulation work. The present work is to investigate effect of the pin configuration, particularly, the number of pins attached on the agitator on the beads motion as well as the impact energy. We have found that the beads motion is dependent on the number of pins, and the impact energy reaches the maximum value at 8 in number of pins under the present condition. In addition, the maximum value under the impact energy is shifted towards large number of pins as the beads filling ratio increases. A new simultaneous simulation of dynamic and breakage behavior of particles has been developed and compared with those of experiment. The simulation results agree well with experimental ones.
