基于离散元法的球磨机介质运动仿真分析

The Simulation and Analysis on Medium Motion in Ball Mill by Discrete Element Method

摘要: 基于离散元法,通过仿真试验来研究球磨机单直径钢球运动和钢球配比运动。仿真结果表明，上述两种运动形式下的钢球运动形态基本一致，主要由泻落运动、抛落运动和离心运动组成。在比较低的转速率下钢球一般只作泻落运动且运动缓慢难以形成比较大的冲击力；随着转速率增大，钢球会有明显的抛落运动出现，抛落点的底脚区一般就在筒体的底部附近；转速率继续增大时，抛落运动就更加明显，抛落的底脚区会向上移动并加快钢球冲击速度。

Abstract: Based on the discrete element method, we carry out the research of the motion of single diameter of steel balls and mixed steel balls by the simulation test. Simulation results show that the motion form of steel balls in the above two kinds of movement is basically consistent, which mainly includes cascading movement, cataracting movement and eccentric exercise. Steel balls generally generate cascading movement and move slowly, and it is difficult to form a larger impact force under the low rate of speed; With the rate of speed increasing, steel balls generate obvious cataracting movement, and drop points of steel balls are generally near the bottom of the cylinder; With the rate of speed continuing to increase, cataracting movement is more obvious, and drop points of steel balls moved up and the impact velocity of steel balls is also faster.