Abstract: There is a significant deviation between the existing theoretical model of gyratory crusher productivity and the actual production data,which limits the development,design and optimization application of new specifications of equipment. Aiming at this problem,the 60-110 E crusher of Metso Company is taken as the research object.Based on the characteristics of the blocking layer,the velocity distribution and regional characteristics of the material moving in different falling modes in the crushing chamber are analyzed,and the productivity prediction model considering the material movement law in the upwarp are a and the falling area is constructed.On this basis,the three-dimensional simulation model of the crusher is established by u sing SOLIDWORKS and EDEM,and the particle model is modified by combining the ore physical property test parameters to simulate the crushing process and obtain the predicted productivity.At the same time,the field operation data are collected to carry out the comparison and verification of theoretical prediction,simulation analysis and measured results.The results show that under the conditions of the bottom angle of the moving cone of 82.41°,the precession angle of 0.342° and the opening size of 160 mm,the theoretical calculation and simulation trends are basically the same in the swing speed range of 100~600 r/min.The productivity increases first and then decreases with the swing speed,and the productivity tends to zero when the swing speed is too high.Under the condition of 130 r/min,the relative error between the theoretical value and the measured value is 6.58%,and the error between the simulation result and the measured value is 2.98%,both within 10%,which verifies the accuracy of the model.The theoretical model can better describe the change law of gyratory crusher productivity,and pro vide theoretical support for equipment design optimization and performance improvement,which has certain engineering applicationvalue.

Key words: gyratorycrusher,motioncharacteristics,plugginglayer,productivity,EDEMsimulation