基于PFC3D的球磨机磨球运动规律的研究

Study on Motion Law of Ball Mill Grinding Ball Based on PFC3D

为了更好地运用球磨机磨介的运动规律来提高磨矿效率,建立了卧式球磨机离散元模型,并利用三维离散元软件PFC3D对球磨机磨介运动进行了数值模拟,研究了影响球磨机磨球运动规律的因素,根据试验设计理论对球磨机转速、衬板高度和衬板截面形状三因素进行了模拟试验,利用回归分析法获得较优方案。结果表明:当滚筒的角速度为2.25 rad/s,衬板高度为75 mm和衬板侧面的角度为(π/48)rad时,磨球冲击速度最大,球磨机的磨矿效率最好,并且球磨机的横向振幅最小。

In order to better use the ball mill grinding medium to improve the grinding efficiency, the paper carried out the numerical simulation of the ball mill grinding medium by establishing a horizontal ball mill discrete element model using three-dimensional discrete element software PFC3 D and studied the factors affecting the movement of ball mill grinding ball. According to the experimental design theory, the simulation test of the angular speed of the rotating cylinder, the height and the section shape of the lining board of the three factors are carried out. And an optimal scheme is obtained by using regression analysis method. The results show that the grinding ball impact velocity is maximum,the grinding efficiency of ball mill is best, and the lateral amplitude of ball mill is the smallest when the angular velocity of the rotating cylinder is 2.25 rad/s, the lining board height is 75 mm and the angle of the lining plate side is（π/48） rad.