Parameter Analysis And Structure Optimization Of EDEM-based Impact Crusher

Crushing machine is the key equipment in broking material,the crushing efficiency and energy consumption of minerals is an important indicator to measure the level of crushing technology.Therefore,in-depth analysis of broken machine’s crushing efficiency and energy consumption,has important significance to improve the design of crushing equipment as well as the level of application.In order to counterattack crusher as the research object;To reduce energy consumption,improve the efficiency of broken as the research target;Basic algorithm with EDEM and single particle collision crushing theory as the theoretical basis,a reliable model of broken particles was established by combining Ф500 ? 400 impact crusher and common tooth geometry to conducting a set of relevant parameters in EDEM by using the parameter inversion method,Ore grain breakage model is established.On this basis,analyzed the effect of different filling ratio and different particle size on particle crushing effect;Secondly,using a single variable method to study the impact crusher geometry on the crushing effect;To the number of broken bonds and a unit of energy consumption on the number of bonds broken as crushing evaluation index;on this basis,the L1645 Orthogonal simulation scheme is designed.Through stepwise regression analysis,and discusses the main factors on the influence of various crushing index trend,at the same time,the speed is the main factors influencing the energy consumption;By crushing efficiency and energy consumption as the optimization goal,and then optimize the rotational speed and crusher geometry parameters,finally get an optimized scheme of low power consumption and high crushing efficiency;then using discrete element software,Before optimization and optimization scheme of crushing efficiency and energy consumption simulation comparison analysis,comprehensive evaluation of optimization effect;By the frequency converter to realize optimization control.The research work has obtained some beneficial results,as follows:1.Through the simulation analysis for particle size and filling rate can conclude: crushing efficiency increased with the addition of filling rate;Crushing efficiency increased with the decrease of the particle size;Unit energy consumption fracture number keys increased with the addition of filling rate,at the same time Unit energy consumption fracture number keys increased with the decrease of the particle size.2.Using a single variable method to simulation analysis of crusher parameters can conclude:crushing efficiency decrease with the addition of plate hammer row number;crushing efficiency increases with the addition of rotor speed;crushing efficiency decrease with the addition of the first level of the counter plate angle;fracture key number decrease as the plate hammer row numberincrease.Unit energy consumption fracture number increases with the reduce of rotor speed;Unit energy consumption fracture number increase with the addition of the tooth angle of first plate.3.Through orthogonal design conclude that number of particle breakage,total energy consumption,number of broken bonds in unit energy consumption all have relationships with five factors;And it is concluded that the main factors that influence the fracture key of particles is plate hammer row number and the rotor speed;the main factors that influence fracture key of unit energy consumption is rotor speed.4.Optimize the speed,crusher geometric structure parameters;Can be concluded that the crusher speed is 1100 r/min,the row number of plate hammer is 2 row,the first level counterattack plate angle is 123 o,the tooth angle of first plate is 100 o and the tooth angle of second plate is 251 owith low energy consumption and high grinding efficiency optimization;And simulation analysis compared to before and after optimization schemes.