球磨机能耗和研磨效率离散元数值仿真设计优化  

Discrete Element Numerical Simulation on Design Optimization of Energy Consumption and Grinding Efficiency in Ball Mill

作　　者：水沛 范威 谢传东 殷腾飞 SHUI Pei;FAN Wei;XIE Chuandong;YIN Tengfei(Hefei Cement Research&Design Institute Corporation Ltd.,Hefei Anhui 230051,China;CNBM(Hefei)Powder Technology Equipment Co.,Ltd.,Hefei Anhui 230051,China)

机构地区：[1]合肥水泥研究设计院有限公司,安徽合肥230051 [2]中建材(合肥)粉体科技装备有限公司,安徽合肥230051

出　　处：《水泥技术》2024年第5期36-41,共6页Cement Technology

基　　金：中国建材集团有限公司揭榜挂帅项目(2021YCJS01、2023ZCYJ03)。

摘　　要：球磨机是水泥粉磨系统中的关键性设备,基于离散元法和Rocky DEM软件,对球磨机运行时研磨介质和物料的运动过程进行了数值仿真,分析了球磨机转速、研磨介质材料属性、填充率、级配对物料颗粒运动状态和设备能耗的影响。研究表明,在不同的物料特性和加工要求下,球磨机转速、研磨介质最佳填充率和级配各不相同;使用陶瓷球代替钢球可以明显降低球磨机能耗,研磨介质级配对球磨机能耗利用率的影响大于研磨介质材料属性,研磨介质的碰撞恢复系数对球磨机能耗利用率的影响大于研磨介质的密度。基于单因素分析和多目标优化设计方法,不仅可以改进球磨机研磨介质的材质和级配,还可以实现水泥粉磨系统的节能降耗。Ball mill is the key equipment in cement grinding system.Based on the Discrete Element Method and Rocky DEM software,the motion process of grinding medium and material during the operation of ball mill is numerically simulated.The effects of mill rotation speed,material properties of grinding medium,medium filling rate and gradation on the motion of material particles and equipment energy consumption are analyzed.The research shows that under different material characteristics and processing requirements,the mill rotation speed,the optimum filling rate and gradation of grinding medium are different.The use of ceramic balls instead of steel balls can significantly reduce the energy consumption of ball mills.Moreover,the influence of grinding medium gradation on the energy consumption utilization rate of ball mills is greater than that of the material properties of grinding medium,and the influence of restitution coefficient of grinding medium on the energy consumption utilization rate is greater than that of the density of grinding medium.Based on single factor analysis and multi-objective optimization design method,it is possible to not only improve the material and gradation of grinding medium but also achieve energy conservation and consumption reduction of cement grinding systems.

关 键 词：球磨机 数值仿真 研磨介质 参数优化 节能降耗 

分 类 号：TQ172.632.1[化学工程—水泥工业]