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Crushing and grinding sand production line processes, they must be due to face up followed by the world economic and technological development, mining has also been a big development, as the crushing and grinding of the crushing and grinding with the float to the surface of a large development, the general trend of development: Development and application of large-scale crusher, grinding and milling equipment, the development of efficient new grinding equipment, new technologies and materials to the introduction of the grinding device to study the process of grinding mechanism and the way of progress of the process efficiency, and research new methods of grinding.
Crushing and grinding equipment, the largest sector of float to the surface and in the industry produced in the 19th century, produced by a century of industrial applications, on the one hand, to prove that these devices function is reliable, with vitality, on the other hand has also exposed their low efficiency and high consumption of room for improvement in progress. The early 1980s, the worldwide economic crisis has led to mining downturn, the mining industry to survive would be needed to improve efficiency for the central. Therefore, the people of this period focus the attention to the development and improvement of the grinding equipment. This case, the improvement of new equipment and old equipment thrown in succession, such as the impact of jaw crusher, super fine crusher, gear cone break immediately, all kinds of crusher, the ring motor drive mill, tower mill and so on.
During traditional equipment improvements and the development of new equipment, new technologies and materials will be gradually introduced. Large-scale move of bearings used in the sinking of equipment. The high pressure oil suspension used in the main mill bearing, polyurethane wear-resistant materials used in the screen to extend the life of high strength metallic materials in the sinking of the device parts of rubber lining and magnetic backing applications, as well as automation technology applied to broken grinding equipment unit control medium.
The huge energy-consuming grinding process, the material consumption is also high, in order to progress the process efficiency, the beneficiation workers continue to study the energy consumption of the law and find energy saving ways. Open up to progress in this area, such as selective grinding efficiency in the field of grinding, to carry out the work of the mill media theory research to further progress of the grinding efficiency, in short, focus on efficiency, energy saving lamps goal to carry out various research, has made many significant achievements.
Crushing method is still the mechanical crushing method dominated the shortcomings of the mechanical crushing method is the low efficiency of energy conversion and product dissociation degree is not good enough, therefore, the research work of the new crushing method has not repose, such as electric radiation, and liquid electric effect, the thermal fragmentation method of work, but these studies are preliminary research.

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