球磨机研磨介质冲击特性和碰撞能量分布特性研究  

Analysis of Impact Characteristic and Collision Energy Distribution of Grinding Media

作　　者：路和 戴丽莉[1] 姚荣斌[1] 丁红星[1] 杨乐新[1] 尹自信 LU He;DAI Lili;YAO Rongbin;DING Hongxing;YANC Lexin;YIN Zixin(Lianyungang Normal College,Lianyungang Jiangsu 222006,China;School of Mechatronie Engineering,China University of Mining ＆ Technology,Xuzhou Jiangsu 221116,China)

机构地区：[1]连云港师范高等专科学校,江苏连云港222006 [2]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《有色金属（选矿部分）》2018年第6期77-81,共5页Nonferrous Metals（Mineral Processing Section）

基　　金：江苏省六大人才高峰项目(ZBZZ-045);江苏高校"青蓝工程"中青年学术带头人(2016);连云港市科技项目(No.CG1615);连云港师范高等专科学校青年优秀人才支持及计划项目(LSZQNXM201701)

摘　　要：以Ф520 mm×40 mm的试验磨机为仿真模型,分析了不同填充率、转速率和衬板高度下的研磨介质冲击特性和碰撞能量区域分布变化规律。研究结果表明,离散元法可以较好地预测研磨介质的冲击特性和碰撞能量区域分布;转速率一定时,球磨机衬板所受平均法向冲击力随着填充率增加而增加;填充率一定时,球磨机衬板所受平均法向冲击力随着转速率的增加先增大后减小;衬板高度增加,研磨介质碰撞频率减少,法向碰撞能量先减少后增加,切向碰撞能量减少。In this paper, aФ520 mm×40 mm test mill was used as a simulation model to analyze the variation of impact characteristic and collision energy distribution of grinding media under different ball filling, mill speed and liner height. The results show that： the discrete element method can be used to predict the impact characteristics of grinding medium and the regional distribution of collision energy. The average normal impact force on the liner of ball mill increases with the increase of ball filling when mill speed is constant. And when the ball filling is constant, the average normal impact force increases first and then decreases with the increase of mill speed. With the liner height increases, the grinding media collision nmnber decreases, the normal collision energy decreases first and then increases, and the tangential collision energy decreases.

关 键 词：研磨介质 法向冲击力 碰撞能量分布 

分 类 号：TD453[矿业工程—矿山机电]