立式搅拌磨机磨矿机理研究进展

Research progress on grinding mechanism of vertical stirring mill

立式搅拌磨机是一种高效率、低能耗的细磨和超细磨磨矿设备,被广泛应用于矿山领域的精矿再磨和第二段、第三段磨矿作业,因此研究立式搅拌磨机磨矿机理对于提高磨矿作业效率、降低磨矿能耗具有重要意义。本文针对立式搅拌磨机的磨矿特点,介绍了立式搅拌磨机的运行工作原理,通过文献收集和调研总结了立式搅拌磨机研磨理论,借助数值模拟方法阐述了立式搅拌磨机的研磨过程、介质运动状态以及矿物颗粒与介质间的作用关系,分析了搅拌器转速、介质填充率、磨矿介质属性、搅拌器属性等工作参数与结构参数对立式搅拌磨机磨矿过程和研磨效果的影响,明确了立式搅拌磨机关键技术参数的选择条件。研究结果表明:选择合适的工作参数和结构参数能有效提高磨矿效率,结合实验对立式搅拌磨机的数值模拟模型进行优化和修正,能提高模拟的可信度;多学科交叉有利于推进立式搅拌磨机的理论研究,推动立式搅拌磨机自动化和广泛化。

Vertical stirring mill is a kind of fine grinding and ultra-fine grinding equipment with high efficiency and low energy consumption.It is widely used in concentrate regrinding and the second and third grinding operations in the mining field.Therefore,the study of the grinding mechanism of vertical stirring mill is of great significance to improve the grinding efficiency and reduce the grinding energy consumption.According to the grinding characteristics of the vertical stirring mill,this paper introduces the operation principle of the vertical stirring mill,summarizes the grinding theory of the vertical stirring mill through literature collection and investigation,expounds the grinding process of the vertical stirring mill,the motion state of the medium and the action relationship between mineral particles and the medium with the help of numerical simulation method,and analyzes the speed of the mixer,the filling rate of the medium,the properties of the grinding medium.The influence of working parameters and structural parameters such as agitator properties on the grinding process and grinding effect of vertical stirring mill,and the selection conditions of key technical parameters of vertical stirring mill are clarified.The results show that selecting appropriate working and structural parameters can effectively improve the grinding efficiency.Combined with the experiment,the numerical simulation model of vertical stirring mill can be optimized and modified to improve the reliability of the simulation.Interdisciplinary is conducive to promote the theoretical research of vertical stirring mill and promote the automation and popularization of vertical stirring mill.