The planetary mill can be used for the ultrafine comminution, when the mechanism size of the mill is determined, the escaping position of the critical speed of the grinding ball will not be changed.

• 行星式球磨机可以用于超细磨矿。磨机的结构尺寸一旦确定,磨球脱离筒壁的临界转速脱离点位置则不会改变。