Study On Crushing Mechanism And Performance Evaluation Of Cone Crusher

Cone crusher is commonly comminution device in the secondary and tertiary crushing of rock material.It is widely used in the metallurgical and minerals industry.As society continues to develop and standards of living progressively increase,the subsequent growing demand for crushed rock materials will result in a need for improving the performance and efficiency of rock crushing equipment.High efficiency,energy saving and environmental protection become an important development direction of cone crusher.The existing cone crusher can not fully meet the needs of social production,and the performance of domestic cone crusher lags behind that of the same products abroad.The global market is monopolized by world class products represented by Metso and Sandvik,which seriously affects the development of crushing equipment industry of our country and the economic performance of users.Therefore,in order to improve the performance of domestic cone crusher and the technical level of domestic manufacturing industry,the working mechanism and performance of cone crusher were deeply studied based on inter-particle breakage and the modern optimization technology in this paper.This paper mainly includes these research contents as follows:Firstly,the mechanism of cone crusher was described.Movement trajectory model was established based on the characters of crushing zones.Energy consumption model was established based on movement characteristics of material which considered material properties,operation parameters and structural parameters of cone crusher.Time dependent wear model was established based on Archard theory which considered liner wear and movement characteristics of material relative to liner.Inter-particle breakage particle size model was established based on population balance model which considered particle size distribution characteristics of material.The comprehensive performance test of cone crusher was conducted on a PYGB1821 cone crusher.Experiments showed that the simulation results were consistent with the measured results.Namely,the mathematical models can be used to predict the performance of cone crusher.Secondly,production model,energy consumption and wear model were established in order to evaluate the performance of the crusher.The influence of speed,eccentric angle,base angle of bowl liner,closed side setting and parallel zone on the performance of cone crusher was researched.The essential relationship between crusher parameters and its performance was revealed by simulation results.The relationship between crusher performance and speed,eccentric angle,base angle of bowl liner,closed side setting and parallel zone was researched based on orthogonal design.The level trend curves of crusher performance were acquired.It was found that the increase of eccentric angle is beneficial to improving crusher performance and larger base angle of bowl liner is helpful to improve the productivity of calibration product size.Finally,multi-objective optimization model of production of calibration product size model,energy consumption model and wear model based on working mechanism and performance characteristics of cone crusher was built up considering the dynamic wear process of the liner.Then self-adaptive differential evolution algorithm based on random ranking framework has been applied to improve the productivity of calibration product size and the life of liner,and reduce energy consumption.The feasibility and reliability of the multi-objective model of cone crusher and the self-adaptive differential evolution algorithm were verified by the discrete element method.The effective control of productivity of product size,energy consumption and wear rate under the whole life cycle of liner has been achieved in this paper.This research provides the basis for developing cone crusher of high efficiency and energy saving.It also serves as a useful platform for testing advanced global optimization methods.