| 초록 |
A simulation of the three dimensional motion of balls in the stirred ball mill and traditional ball mill for the research of grinding mechanism has been carried out by DEM simulation. The effects of parameters relating to the friction coefficient of ball material and operational conditions such as rotation speed and ball size were investigated. The results were analyzed in terms of velocity distribution, impact force and energy. Results show that the increasing friction coefficient flow velocity of the ball increases both the impact force and energy, but decreased flow velocity in the stirred ball mill. Whereas in case of the traditional ball mill, decreases both the impact force and energy, but increases flow velocity of the ball. Moreover, physical experiments were conducted to quantify grinding performance under the same conditions. These findings are useful to understand and optimize the ball motion and grinding behavior of the stirred ball mill and traditional ball mill. |
