基于EDEM的搅拌磨机内介质碰撞特征研究  

Research on Collision Characteristic of Media in Vertical Stirred Mill Based on EDEM

作　　者：李国峰 李椿楠 刘立伟 栗艳锋 LI Guofeng;LI Chunnan;LIU Liwei;LI Yanfeng(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210

出　　处：《金属矿山》2023年第5期137-143,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:52074067,51804123)。

摘　　要：与球磨机相比,搅拌磨机更适用于矿石细磨。在实际磨矿过程中,搅拌磨机内部的工作状态难以直接测量,借助模拟仿真技术对其进行剖析已成为该领域的重要研究方法之一。以实验室立式搅拌磨机为原型,采用EDEM离散元模拟软件对搅拌磨机内介质碰撞特征进行分析,系统考察了介质配比、充填率、搅拌器转速等工艺参数对搅拌磨机内介质运动速度和介质间碰撞次数、碰撞力、碰撞能的影响规律。结果表明,Φ5 mm和Φ3 mm介质配比越大,介质运动速度、碰撞最大法向力、碰撞能越大,介质间碰撞次数越少;随着充填率的增加,介质间碰撞次数逐渐增加,介质运动速度、碰撞最大法向力、碰撞能逐渐减小;随着搅拌器转速的增加,介质运动速度、碰撞次数、碰撞最大法向力、碰撞能均呈增加趋势。研究结果揭示了搅拌磨机内介质的运动状态,对适宜磨矿工艺参数的选取有一定的指导意义。The stirred mill is more suitable for fine grinding of ore than ball mill.In the actual grinding process,it is difficult to measure the internal working state of the stirred mill directly.It has become one of the important research methods to analyze the internal working state of the stirred mill with the help of simulation technology.In this study,a laboratory vertical stirred mill was taken as the prototype.The collision characteristics of media in stirred mill were analyzed using EDEM discrete element simulation software.The influences of process parameters,such as medium ratio,filling rate,and agitator speed,on the motion velocity of media,number of collisions,collision force,and collision energy were investigated systematically.The results showed that the motion velocity of the media,maximum normal force of collision,and collision energy increased with increasing the media ratio ofϕ5 mm andϕ3 mm,but the number of collisions decreased.With increasing filling rate,the number of collisions was increased,but the motion velocity of media,maximum normal force of collision,and collision energy was decreased gradually.Meanwhile,a higher rotate speed of stirrer gave an increased motion velocity of the media,number of collisions,maximum normal force of collision,and collision energy.The results of this paper revealed the motion state of the media in the stirring mill,which also provided certain guiding for the selection of suitable grinding process parameters.

关 键 词：EDEM 搅拌磨机 介质碰撞 介质配比 充填率 搅拌转速 

分 类 号：TD453[矿业工程—矿山机电]