Analysis Of Grinding Effect Of The Pin-type Rotor Structure On Horizontal Small Sand Mill

With the advancement of science and technology,the development of paints,coatings,inks and other industries,fine grinding has received more and more attention.Sand mill as an important equipment for ultra-fine processing,its high processing accuracy,a wide range of materials,practical characteristics,widely used in scientific research,testing and crushing micro-manufacture of debugging.Due to the high processing cost of traditional sand mills,the instability of quality and accuracy restricts the application of sand mills.The filling rate,ball material ratio,and the size of the dielectric ball are the main factors affecting the sand mill.The rod pin rotor structure type has a great influence on the grinding results of the sand mill.The top of the pin on the rotor and the grinding inner barrel The distance,the number of pins on the rotor,the arrangement and the distance between the pins are all important factors affecting the grinding effect of the horizontal sand mill.Taking the rotor of the small horizontal sand mill as the research object,the grinding mechanism and working principle of the sand mill are described.Five different pin-pin type rotor structures are studied for the grinding effect of the horizontal sand mill(grinding efficiency,power consumption).,the final grinding particle size)effect.Discrete element method software(EDEM)was used to simulate the grinding process of five different structural types(the difference is the number of pins,the arrangement of the pins,and the effective outer diameter of the rotor),and a horizontal sander grinding was proposed.Performance evaluation methods: one is higher grinding efficiency and the other is lower power consumption.The simulation results show that different types of rotors have different grinding effects.The model 2 rotor defined in the paper has the lowest power consumption and the highest grinding efficiency.The grinding performance of the model 1 rotor is slightly lower than that of the model 2 rotor.Finally,the prototype was designed and manufactured.Prototype experiments were performed on the rod-type rotor with the best grinding effect simulated by the EDEM software and the rod-pin type rotor with good grinding effect.The Malvern laser particle size analysis was used.The instrument detects the particle size of the sample before and after the experiment.The experimental results show that the grinding time of the model 2 rotor is 20 min less than that of the model 1 rotor and the grinding efficiency is increased by about 30% when the same final grinding particle size is achieved;at the same time,the model 2 rotor output work is performed during grinding.The output power consumption of the model 1 rotor is 0.01 KW.h lower.Comparing with the software simulation results,the experimental results are basically consistent with the simulation results.Through EDEM software simulation and prototyping experiments,the effect of different rod pin rotor structure types on the grinding performance of horizontal sand mill was analyzed.The simulation results were highly consistent with the experimental results.This research method not only provided a certain reference for subsequent actual production.It also saves manpower,material and financial resources,and also verifies that different types of rod-pin type rotors have a great influence on the grinding results of small horizontal sand mills.If the rod-pin rotor structure is properly designed,it will be effective.Improve the grinding effect of small horizontal sand mills.