For decades, China's metal mining industries have been working hard for the energy saving and the improvement of economic efficiency, and following the basic principle of "more crushing less grinding". Progress of crushing equipment is mainly showed in the development of the application of new jaw crusher, double-lumen jaw crusher, dual-chamber rotary crusher, impact jaw crusher and other original practicality crushing equipment. But compared with foreign crushers in technology, working effect, certain gap still exists between the domestic crushers and foreign crushers. China has developed high pressured roller crusher to replace fine crushing and course grinding process. In addition, the column mill is also used in the domestic part of the mine, and such devices have a large range of energy saving system, which can improve the yield of 30% to more than 50%, and the device has a high operation rate, and low environmental impact.
The mechanism of crashing materiel about impacting crasher was discussed and the contact-impact finite element arithmetic was also adopted. The finite element model of the impacting system was established based on the structure of impacting crasher and the process of crashing materiel about impacting crasher was simulated and calculated. The rotor, the flat hammer, the materiel and the counter-board were selected as the primary objects when the finite element model of the impacting system was established. At the same time, the influential factors of the crashing effect, the stress and the strain were researched. Otherwise, the shape of counter-board was optimized through the analysis and emulation. Through the emulation and calculation, the results about the contacting force, the stress and the strain on different parts in the whole process of crashing materiel were obtained.
As for course crushing, better equipments have not been developed to replace traditional jaw crusher and rotary crusher at present. Currently, we mainly aim at promoting, developing and improving the wear-resistance of crushers by modern technology to achieve the aim of energy saving, high efficiency, and long service life. There are more new types of crushers in the field of fine crushing. All in all, jaw crusher is used most widely among jaw crusher, cone crusher, impact crusher and roller crusher.