Study on Movements of Steel Balls in Mill by Discrete Element Method
Based on Discrete Element Method(DEM), movements of steel balls were simulated by Particle Flow Code in 3 Dimensions (PFC 3D), the influences of ball diameter, ball filling rate, rotary speed rate of mill on steel balls movements were studied. The results showed that steel balls quantity increased, but surface area of steel balls enlarged, and void rate decreased at the same filling rate as steel balls diameter decreased, which indicated the grinding force of materials was stronger. Steel balls movements were relevant to rotary speed rate of mill and ball filling rate. As rotary speed rate and ball filling rate increased, the steel balls moved from cascading motion gradually to throwing motion, and became centrifugal motion after rotary speed rate exceeded certain value. When ball filling rate remained unchanged, the depart point of steel balls became higher, the dropping angle became smaller and throwing gap increased firstly then decreased with the rising of rotary speed rate. When rotary speed rate was 76％, the throwing gap distance reached to an maximum value and the impact crushing action was the strongest.
DEM steel balls movements PFC3D
Ping Zhou Jinghong Du Xixiang Duan
Faculty of Land Resource Engineering Kunming University of Science and Technology,Kunming 650093, P Faculty of Materials Science and Engineering Kunming University of Science and Technology,Kunming 65
国际会议
杭州
英文
120-123
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）