基于检测球的球磨机磨矿介质运动试验分析

针对球磨机磨矿介质运动信息很难测量的问题,以Φ520 mm×260 mm试验球磨机为研究对象,基于设计的检测球装置分析了不同转速率工况下磨矿介质运动参数的变化规律,并提出了一种试验验证离散元仿真的方法。研究结果表明,检测球加速度主要介于0～3.3 g,球磨机的转速率越大,加速度的波动范围越大,磨矿介质的冲击碰撞越明显;检测球角速度主要介于0～31 rad/s,球磨机的转速率越大,角速度的波动范围越大,磨矿介质的研磨作用越明显;检测球试验与离散元仿真的单位质量转动动能累积分布基本一致,说明检测球试验验证离散元仿真是有效的。

An Experimental Analysis on Grinding Media Motion in Ball Mill by Instrumented Ball

Aiming at it is difficult to measure the motion information of grinding media in ball mills, this paper takes the ?520 mm×260 mm laboratory ball mill as the research object. Based on the instrumented ball, the variation of the motion parameters of grinding media under different mill speed is analyzed, and the method of experimental verification of DEM simulation is proposed. The result showed that the acceleration of instrumented ball is mainly between 0~3.3 g, the larger the mill speed of ball mill, the greater the fluctuation range of acceleration, the more obvious the impact collision of grinding media. The angular velocity of instrumented ball is mainly between 0~31 rad/s, the larger the mill speed of ball mill, the greater the fluctuation range of angular velocity, the more obvious the grinding effect of grinding media. The cumulative distribution of the specific mass-rotational kinetic energy between experiment and DEM simulation is same, which indicates that the instrumented ball experiment verifies that DEM simulation is effective.