Materials crusher is a long history topic. Back in the 1950s Ellis - checkcompanies began large-scale study broken, the 1960s draw significant conclusions. With the in-depth research, people familiar with the fragmentation of the high-power operation [1],

can be used to improve energy efficiency and reduce production costs. B. H. Bergstrom in the single-particle breakage study found, in the air and a broken metal plate at the debris impact clearly secondary crusher, with a broken fragments of broken kinetic energy of all the 45%. If full use of secondary energy broken, they would increase the efficiency of fragmentation. It was also noted that a smaller load than short periods of sustained strong impact crusher more promising material. Hu Jingyan Queensland and China's Xu Xiao - he studies the particles smash at concluded that HIP smash efficiency was 100%, the efficiency of a single impact in 35 percent to 40 percent. To conserve energy, improve efficiency smash, smash should be more static pressure, using less impact smash. Schonert study shows that if a large number of particles of brittle materials by 50 MPa pressure more than we could from "BED smash" a considerable energy saving. At present, "the crushed material layer theory" has been recognized for the smash sector, according to smash the theory of expected new equipment developed by the United States Nordberg rotary disc cone crusher, the Russian inertia cone crusher, etc. [2].

More broken the principle of less developed grinding expected to smash the principle of a new type of crusher is the main direction. 1996 Fourth National Conference on academic works powder DENG Yue-hong, Zhang Zhi Rail issued a "smash fractal behavior of materials research," it [3], the authors believe that research should be placed in the broken theory is entered into three major areas: theoretical strength of the study, Evaluation of the effect of broken, broken power research. For a long time, the theoretical study of the major smash stay in the application of experience and statistical speculation, people understand the law is not clear smash, not systems. People look forward to the emergence of a new theory on the field will bring a crushing changes.
 
1982 B. Mandelrot fractal theory put forward in the application of rock theoretical research, and the author to apply them broken theory. After the study, the authors successfully used the fractal theory derived strength and shortcomings fractal distribution of the relationship between the established smash the particle size distribution model, found a fractal dimension, with the broken index distribution of the relationship between the probability of using particle surface fractal dimension Ds will be three power theory unified.

In order to optimize the jaw crusher, MA Shao Jian and Chen bing cheng use of laboratory small compound pendulum jaw crusher, respectively single-particle feeding, narrow particle feeding tablets and mixed-feeding of broken test [4] The results of the study are:

(1) Impact jaw crusher product because of the size of in addition to hardness of materials other than their own, including feeding particle size, composition, Pai mine mouth cavity size and broken loose materials related to

 (2) machine broken jaw broken material, whether it is material or broken single-layer particle breakage, increased feed particle size, particle size smaller product. Therefore, in accordance with production expected to choose suitable particle size specifications of the jaw crusher and regulation nesting mine mouth size,

(3) material layer broken particle breakage better than single-product of broken lower granularity. So production should try to maintain the broken Crusher cavity suitable material layer to reduce fragmentation of granularity.

Smash (including crushing and grinding) is the focus of the rapid economic and social development of an industrial indispensable link. In various metals, non-metallic, chemical raw materials and mineral processing of construction materials, operation to smash the huge consumption of energy, and also of inefficient operations. Materials smash process, because operations produced audible, heating, vibration and friction, etc., so that consume a lot of energy. Thus over the years within the community who has been studying how to achieve energy-saving and efficient completion of broken and the grinding process. From theoretical research to innovative equipment (including transformation of the old equipment) until the change in the production process.

The current fragmentation theory, technology and equipment research is focused on:

 (1) study the fragmentation of energy-saving and efficient theory, but also to identify new theoretical breakthroughs have already broken the three well-known theory;

(2) new non-mechanical study of the combined effects of high energy or force field of broken equipment at present there are not yet see the industrialization of equipment, but the study stage,

(3) the improvement of existing equipment, which often is based on user needs, and not the market or the development of new large-scale production equipment.

For all the above issues, as foreign mines since the 1980s has been the slow development of this area make little progress. Fewer new equipment abroad, the domestic state-owned large mines due to input minimal, and no development, and small and medium-sized mines because of the demand for raw materials from all over the last few years to some development.