8.15jaw

Principles introduced several Crusher
Crushing (including crushing and grinding) is a rapid development of modern economic society is essential to an industrial link. Jaw crusher for sale. In a variety of metal, nonmetal, chemical and building materials of mineral raw materials, processing, crushing operations to consume huge amounts of energy, and also is inefficient operations. Material crushing process, due to operations produce sound, heat, vibration and friction effects, the energy consumption of large quantities. So for many years the profession has been studying how to achieve energy-saving and efficient completion of the process of crushing and grinding. From theoretical research to innovative devices (including the transformation of old equipment) until the change in production process.
Currently broken theory, process and equipment research mainly focuses on: (1) study break in the energy-saving and efficient theory, but also sought to identify new theoretical breakthrough people have broken the three well-known theory; (2) of new non-mechanical force of the combined effects of high-energy force field or broken equipment, there is now not see the industrial equipment, but the research phase; (3) improve existing equipment, this is often carried out according to user needs, and not see a big market scale of production or development of new equipment.
For these various problems, due to foreign mining developed slowly since the 1980s makes little progress in this regard. New equipment less foreign and domestic investment as very few state-owned large-scale mining, there is no development, and small mines due to local demand for raw materials, ranging in recent years, a certain development.
Broken Theory
Materials is a long history of breaking the topic. Back in the 1950s Aires - Chalmers Company began large-scale study break to work 60 years to arrive at a significant conclusion. With further research, people familiar with the high power of crushing, can be used to improve energy efficiency and reduce production costs. BHBergstrom single particle crushing in the study found that, once in the air crash of broken fragments of metal plate to generate significant secondary crushing, with a kinetic energy of the broken fragments of the total energy of 45% broken. If they can take full advantage of the secondary crushing energy, you can improve crushing efficiency. It was also pointed out that a smaller load than a short period of sustained strong impact crushing more promising material. China's Hu Jingkun and Xu Xiao-study concluded that when particles smash, crush efficiency is 100% static, single-impact efficiency of 35% to 40% or so. To save energy, improve crushing efficiency, should be more use of static crush, crush less impact. Schonert studies have shown that, if the brittle material particles are a large number of more than 50MPa pressure, we can by the "layer of crushed material," a considerable energy saving. Stone crusher for sale. Current "layer of crushed material theory" has been recognized for the crushing industry, according to the theory of layers crushed the United States developed a new device's rotating disk Nordberg cone crusher, cone crusher Russia's inertia and so on.
Little more than broken grinding principles to guide development to the principles of the new material layer crushed crusher is currently the main direction. 1996 Fourth National Powder Engineering Conference on Deng YH, Zhang Zhi-iron made "material crushing Fractal Behavior" article, the authors believe that breaking the theoretical study should be attributed to forge three major areas: strength of the theoretical study, the crushing effect of the evaluation, broken power research. For a long time, crushed the main stay in the theoretical study of the application of experience and statistical speculation, people understand the law is not clear crushed, not the system. It is expected that the emergence of new theories would bring about a change in broken field.
1982 B. Mandelrot proposed application of fractal theory in the study of rocks, which the authors apply it in the broken theory. After the study, the authors successfully used the fractal distribution of defects derived strength and fractal dimension of the relationship between the establishment of a crushed particle size distribution model, found a fractal dimension, probability distribution between the index and the broken relationship with the particle surface fractal dimension Ds will be three power theories unified.
In order to optimize the jaw crusher, Mashao Jian and Chen Bingchen use of laboratory small compound pendulum jaw crusher, single-grain feed, respectively, narrow grain size and mixed feed grade feed grain crushing test, the results are: (1 ) affect the jaw crusher product size characteristics of the factors in addition to hardness of the material itself, but also by including the feed particle size, composition, discharge mouth cavity size and broken state of loose materials; (2) Jaw Crusher broken material, whether it is broken or single-particle material layer break, feed particle size increases, the product of the smaller particle size. Therefore, the production should be selected according to the appropriate particle size specification of jaw crusher mouth and adjust the size of mine discharge; (3) than the single-particle material layer broken broken broken can reduce product size. Therefore, the production should be maintained crusher crushing cavity suitable material layer, Crushing Palnt For Sale, to reduce the fragmentation product size.