The development history of impact crusher can be traced back to the 50s of the 19th century, and it has been a long time since the birth of the world's first jaw crusher. With the development of productivity, the jaw crusher can no longer fully meet the needs of crushing technology, so on the basis of the jaw crusher, people have designed an impact crusher.
In 1924, the Germans first developed two types of impact crusher, single and double rotors, the structure of the crusher at that time was similar to the modern squirrel cage crusher, because no matter from the structure, or from the working principle analysis, it has the characteristics of impact crusher. Due to the repeated impact of the material, the crushing process can be discharged freely and unimpeded, but due to the limitation of the feeding strength and the capacity of the impact crusher, its model is gradually transformed into a squirrel cage crusher.
In 1942, on the basis of summarizing the structural characteristics and working principle of the hammer crusher of the squirrel cage crusher, the German Andreson invented the AP series impact crusher with a similar structure to the modern impact crusher. Thanks to the relatively high production efficiency of this impact crusher, which can process relatively large materials, and it is relatively simple in form and structure, and easy to maintain, this impact crusher has been rapidly developed. With the increasing perfection of crushing, screening and crushing theory and the further development of technology, a variety of high-performance impact crushers have emerged in an endless stream. With the continuous development of international science and technology, large-scale crushing and screening equipment has been developed very perfectly.
Until the end of the eighties, China introduced KHD hard rock impact crusher to fill the domestic gap, but it lagged behind foreign countries for more than 20 years. Domestic hard rock impact crusher, at the beginning of its core parts of the hammer rely on imports, the localization of the hammer in the "Eighth Five-Year" period as a ministerial scientific research project, after the success of the project, the domestic hammer not only replaced the import, but also has been exported to Europe, America, Japan and other countries. The breakthrough of wear-resistant materials makes the hard rock impact crusher more powerful. For example, in order to improve the quality of highway construction in China, the Ministry of Communications has proposed a scientific research project of pavement concrete stone crushing station, which has been included in the national "Eighth Five-Year Plan" project. The trial production equipment of the project failed in the use of a construction site in Northeast China. The user switched to the hard rock impact crusher to produce stone, which fully meets the requirements of anti-skid pavement concrete on the highway. As a result, the reputation of the hard rock impact crusher has been greatly enhanced. Shanghai once regarded the possession of such equipment as a necessary condition for bidding to undertake highway construction. According to statistics, hard rock impact crusher has been used as pavement stone preparation equipment in highway construction in all provinces and cities across the country to crush hard materials such as basalt and andesite with a compressive strength of 300MPa, and to reach graded stone below 19.6mm. The percentage of needle flakes is less than 10%.
The development of the national economy is bound to drive the rise of some infrastructure, and the construction of China's infrastructure has entered a boom, so in this context, it will inevitably 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 machine-made sand and concrete aggregates are required in the development process. And in the future, whether it is a highway or a construction project, there are higher requirements for sand and gravel aggregates (or concrete aggregates), and the requirements for its particle shape and quality are becoming more and more stringent. What does it mean that the impact crushing equipment helps the sand and gravel industry to complete the construction needs? Based on the strict requirements of construction sand and in order to open up a broader market, the new HCP and HCS high-efficiency impact crusher are used in a full set of hardcover sand and gravel production lines for advanced crushing and the normal operation of the entire production line. At this time, a new type of counterattack broke appeared.
