不同研磨介质填充率下球磨机内钢球碰撞研究  

Investigation on Collision of Steel Balls in Ball Mills with Varied Filling Rates of Grinding Media

作　　者：袁文彬 孙欣 金凯 王小龙 张雁生[1] YUAN Wenbin;SUN Xin;JIN Kai;WANG Xiaolong;ZHANG Yansheng(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿冶工程》2023年第4期57-60,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51974363)。

摘　　要：以工业生产中使用的大型球磨机为例,将离散单元法应用到有效内径4.6 m的球磨机中,模拟研究研磨介质填充率对球磨机内部颗粒碰撞以及能耗的影响。结果表明,研磨介质填充率30%~35%时,研磨介质填充率增加,球磨机内部钢球与矿石之间的碰撞频次逐渐增加,但矿石与矿石之间的碰撞频次与总碰撞频次之比先增加后降低,且钢球与钢球、钢球与衬板之间的能量损失也会增加。增加球磨机研磨介质填充率不仅会降低球磨机磨矿效率、增加能量损失,还会增加磨机内部颗粒对衬板的磨损,不利于衬板的持续性使用。A commercially applied large ball mill with an effective internal diameter of 4.6 m is taken for study,and the discrete element method(DEM)was introduced to simulate and investigate the influence of filling rate of grinding media(steel balls)on the collision of particles inside the mill and energy consumption.It is found that when the filling rate of grinding media is 30%-35%,the frequency of ball⁃ore collision increases gradually.However,the ratio of ore⁃ore collision frequency to the total collision frequency increases first and then decreases,and the energy loss for ball⁃ball and ball⁃liner collisions increases.It can be seen that increasing filling rate of grinding media may not only reduce grinding efficiency and increase energy loss,but also increase liner wear by steel ball,which is not conducive to sustainable usage of mill liner.

关 键 词：球磨 钢球 研磨介质 填充率 离散单元法 能量损失 碰撞频次 

分 类 号：TD921[矿业工程—选矿]