Particle impact energy variation with the size and number of particles in a planetary ball mill
Particle impact energy variation with the size and number of particles in a planetary ball mill
复制标题
行星式球磨机中颗粒冲击能量随颗粒尺寸和数量的变化
DOI：
10.1051/matecconf/202133302016
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发表时间：
2021
影响因子：
--
通讯作者：
M. Iwata
中科院分区：
文献类型：
--
作者：
F. Hirosawa;T. Iwasaki;M. Iwata
为了研究行星球磨机研磨过程中颗粒所受的机械能，采用离散元法（DEM）模拟了不同颗粒尺寸和数量条件下颗粒和磨球的行为，并根据颗粒在研磨过程中的变化规律估算了颗粒的冲击能。作为导致颗粒破碎的冲击能，我们重点研究了颗粒与磨球/磨壁以及颗粒与颗粒碰撞时产生的颗粒冲击能。颗粒大小和颗粒数量分别影响颗粒单次碰撞时的冲击能水平和颗粒碰撞次数，导致颗粒的总冲击能随着颗粒大小的减小和颗粒数量的增加而增加。研究结果表明，应根据颗粒大小和颗粒数量的变化，适当调整磨球尺寸等磨矿条件，使颗粒在磨矿过程中获得较大的冲击能。
To investigate the mechanical energy applying to the particles in a grinding process using a planetary ball mill, the impact energy of particles was estimated by simulating the behavior of the particles and grinding balls using the discrete element method (DEM) under different conditions of the size and number of particles, corresponding to their variations during milling. As the impact energy contributing to the particle breakage, we focused on the particle impact energy generated at particle-to-grinding ball/wall and particle-to-particle collisions. The particle size and the number of particles affected the level of particle impact energy at a single collision and the number of collisions of particles, respectively, resulting in an increase of the total impact energy of particles with decreasing particle size and increasing number of particles. The result suggests that milling conditions such as the size of grinding balls should be adjusted appropriately based on the variation of the size and number of particles so that the particles can receive large amounts of the impact energy during milling.