基于PFC3D混合密度振动磨机磨介球的仿真与分析

Simulation and Analysis of PFC3D Mixture Density of Grinding Balls based on a Vibration Mill

为研究振动磨机筒内磨介球密度的改变对研磨效果的影响,按不同磨介密度配比设定六种工况,设置相应的模型参数、边界限制条件、重力载荷施加以及磨介球个数,建立离散元法磨介流数值模拟模型,用PFC3D软件进行模拟仿真,结果表明:工况5的研磨效果最佳,而工况1的研磨效果最差,工况5相比工况1,动能提高1.936倍、应变能提高2.373倍、接触力提高1.605倍.本研究为制备超微颗粒细化试验的参数优化提供了参考,为生产实践提供数据的指导与理论的支持.

To study the impacts of changes in vibration mill cylinder grinding medium density on effects of grinding balls,six situations are set according to grinding ratio of grinding medium density.Corresponding model parameters,boundary conditions,gravity load imposed restrictions and grinding media ball number are also set to build a model for grinding medium flow numerical simulation of discrete element method.PFC3D software is used for simulation.The results indicate that situation 5 is the most efficient in grinding while situation 1 is the least efficient.Compared with situation 1,situation 5 is better in which kinetic energy increases by 1.936 times,strain energy by 2.373 times,the contact force by 1.605 times.This study casts light on superfine particle refinement of experiment parameter optimization,and provides data and theory for real production.