High-energy Stirring Ball Mill Grinding Parameters And Optimized Simulation Design Of Silo

High-energy ball milling technology is the main preparation technology of ultra-fine powder materials.The development of ultra-fine powder materials continuously puts forward new requirements for ball milling equipment and processes.At present,the exploration of high-energy ball milling equipment and technology is mainly based on experimental methods.There is insufficient understanding of the collision mechanism between the grinding medium and the powder during the ball milling process.Therefore,this paper combines discrete element method and EDEM simulation calculation to explore the influence of the ball milling process and structure parameters on the crushing effect of the high-energy ball mill in the working process.This paper mainly studies the influence of the speed of the stirring shaft in the grinding chamber and the size of the grinding media on the particle crushing effect in the grinding chamber,and studies the optimal ball milling pro cess parameter ratio;at the same time,by improving the structure design of the grinding chamber and the stirring blade,the ball mill is improved.The accumulation of particles generated in the process can reduce the energy consumption of the ball mill and improve its energy utilization rate.This article takes Kunming Haichuangxing Technology Co.,Ltd.HCX-2L horizontal high-energy stirring ball mill as the research object.The main research contents and results are as follows:(1)Through the combination of EDEM simulation calculation and actual ball milling experiment,the influence of different stirring shaft speed and grinding media size of high-energy ball mill on the efficiency of ball milling is discussed.When the speed of the stirring axis is 10.03 m/s and the size of the grinding medium is 5mm,the force of the powder is mainly caused by the collision and grinding between the powder and the grinding medium.Among them,the normal force accounts for 32.42%,and the shear force accounts for the proportion.40.9%.At this time,the collision energy of the powder is 187.26 J,the energy consumption of the stirring shaft of the ball mill is500.58 J,and the energy utilization rate of powder crushing is 37.41%.,The ball milling experiment proved that the particle size of the silicon powder after ball milling was 1.3 ?m.(2)Through the EDEM simulation calculation,the influence of the rounded structure with different degrees of the inner wall of the grinding chamber on the ball milling effect is studied.The improved design of the grinding chamber body structure reduces the particle accumulation rate in the ball milling process and improves the energy utilization rate of powder crushing.Among them,when the fillet of the grinding chamber body is designed to be 10°,the powder accumulation rate is reduced by 23.08%,the energy consumption of the stirring shaft is reduced by 19.85%,the powder energy utilization rate is increased by 8.25%,and the ball milling effect is the best.(3)Through EDEM simulation calculation,the influence of the bending design of different degrees of the mixing blade in the grinding chamber on the ball milling effect is studied.The blades on both sides of the mixing blade are bent.The bending design of the mixing blade reduces the particle accumulation rate during the ball milling process.Among them,when the blade bending design is 5°,the powder accumulation rate is reduced by 32.48.%,the energy consumption of the stirring shaft is reduced by14.45%,and the energy utilization rate of powder crushing is increased by 3.47%.The ball milling effect is the best.This paper has completed the research work on the improved design of the horizontal high-energy stirring ball mill ball mill parameters and the structure of the grinding chamber,which provides a research method for the design of the ball mill and the selection of process parameters in the future.