Impact crusher, the history of development can be traced back to the 1850s, and the birth of the first jaw crusher in the world has passed for a long time. With the development of productivity, Jaw Crusher can no longer fully meet the needs of crushing technology. Therefore, on the basis of Jaw Crusher, people have designed a counter crusher.
In 1924, the German first developed a single and dual rotor impact crusher of two types. The structure of the crusher at that time was similar to that of a modern squirrel-cage crusher because of its structural and working principles. , It has the characteristics of impact crusher. Because the material needs repeated impacts, the crushing process can be free and unblocked, but due to the feeding force and the ability of the impact crusher, its model is gradually transformed into a squirrel-cage crusher.
In 1942, the German Andreson summarized the structural characteristics and working principle of the hammer crusher of the squirrel-cage crusher and invented an AP series impact crusher similar to the structure of the modern impact crusher. Thanks to the relatively high production efficiency of this kind of impact crusher, it can handle relatively large materials, and it is relatively simple in terms of form and structure, and is easy to maintain. Therefore, this kind of impact crusher has developed rapidly. With the increasingly perfection of crushing and screening crushing theory and the further development of technology, various high-performance impact crushers are also emerging. With the continuous development of international science and technology, large-scale crushing and screening equipment has been developed very well.
Until the end of the 1980s, our country introduced the KHD hard rock counterattack crusher to fill the gaps in China, but it has fallen behind China for more than 20 years. Domestic hard rock counterattack crusher began with its core parts plate hammer relied on imports, and localized plate hammers were listed as ministerial scientific research projects during the “Eighth Five-Year Plan” period. After the project was successful, the homemade plate hammer not only replaced imports, but also A large number of exports to Europe and the United States, Japan and other countries. The breakthrough of wear-resistant materials makes the hard rock counter crusher even more powerful. For example, in order to improve the quality of China's highway construction, the Ministry of Communications has proposed a research project for a concrete crushing station for concrete pavement and has been listed in the national “Eighth Five-Year Plan” research project. The trial equipment of the project failed to be used in a construction site in the northeast. The user, after using the hard rock counter-attack crusher to produce stone material, is in full compliance with the requirements for concrete on the highway. So hard rock counterattack crusher reputation. Shanghai had used such equipment as a prerequisite for bidding for highway construction. According to statistics, hard rock counter-attack crushers have been used as pavement stone preparation equipment in highway construction in various provinces and cities across the country to break basalt, andesite and other hard materials with a compressive strength of 300 MPa, and achieve gradation below 19.6 mm. Stone material. Its percentage of needles is less than 10%
The development of the national economy must inevitably lead to the rise of some infrastructure facilities. The construction of our country's infrastructure has entered an upsurge, so in this context, it is bound to promote the progress of China's mining machinery market. Taking the sand and gravel industry as an example, due to projects like railways, a large amount of sand and concrete aggregates are needed during the development process. And in the days to come, whether it is a highway or a construction project, there are high requirements for sand aggregates (or concrete aggregates), and the requirements for their grain shape and quality are also increasingly stringent. How do you say that counter-attack equipment assists the construction of sand and gravel industry? According to the strict requirements of construction sand, and in order to develop a broader market, the new HCP, HCS impact crusher is applied to a complete set of hardcover sand production lines. Used for advanced crushing and normal operation of the entire production line. At this time, the emergence of new counterattacks.
