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2022-12-29 13:34:59
Hammer crushers and Impact Crushers are similar in appearance, both adopt the principle of impact crushing , and both can be used for coarse and medium crushing of medium-soft materials such as limestone, but the internal structures of the two crushers are different.
Comparison of working principle between hammer crusher and Impact Crusher
The Impact Crusher has a large crushing chamber and a low and large feed port. The crushing of materials not only depends on the impact of the blow bar, but also uses the repeated impact between the material and the impact plate or between the material and the material, and the impact crushing effect is more sufficient. , so as to better crush bulk materials, and the product grain shape is mainly cubes. The crushing cavity of hammer crushing is relatively small, and the high-speed rotating crushing rotor is equipped with multiple cross-movable hammer heads. The material is mainly split/grinded based on the crushing principle, so the crushed products contain needles and flakes. And more fine material content.
Blow bar and hammer head are the main wearing parts of Impact Crusher and hammer crusher respectively. The wear of the blow bar of Impact Crusher mainly occurs on the side facing the material, and the metal utilization rate of the blow bar can reach 45%-48%. The hammer head of the hammer is in a hanging state, and the wear occurs on the top, front, back and side. Compared with the blow bar, the hammer head wears more seriously, and the metal utilization rate is about 35%.
Hammer Crusher and Impact Crusher Comparison of Rotor Hammer Head and Blow Bar
The blow bar of the Impact Crusher meets the material from the bottom up for crushing operation, and throws the material onto the impact plate above. The hammer crusher crushes the material in the direction in which the material falls. The Impact Crusher rotor runs clockwise, the blow bar moves counterclockwise toward the material from bottom to top, and the hammer hits along the direction of material falling.
The blow bar and the rotor of the Impact Crusher are rigidly linked, that is, the blow bar is fixedly installed on the rotor. When crushing, the inertia of the entire rotor can be fully utilized to impact the material, not only crushing the material, but also having a large speed and kinetic energy. The hammer head of the hammer crusher breaks the material individually (the hammer head is in a hanging state), and its speed and kinetic energy are limited.
Impact Crusher Coarse Aggregate Product Granularity
There is no grate screen in the lower part of the Impact Crusher , and the adjustment of the product particle size can be controlled by adjusting the rotor speed or rotor diameter, adjusting the opening size of the distributor, and adjusting the clearance of the grinding chamber. The hammer crusher controls the particle size of the product by adjusting the size of the sieve gap. Therefore, when processing materials with high water content, the Impact Crusher can avoid the phenomenon of clogging the grate when crushing wet materials, which is more advantageous.
The hammer crusher uses the high-speed rotating crushing rotor to install multiple cross-movable hammer heads, and there is a strip-shaped exposed material wall plate below. The material is mainly split/grinded based on the crushing principle, so the crushed products There are more needle flakes in the medium, and there are dark cracks inside the large material; there are more stone powder in the fine material, and the needle flakes are higher, commonly known as "stone chips", which are very similar to machine-made sand, but the grain type gradation does not match. Manufactured sand standard (GB/T14684-2011) requirements, become the first generation of sand and gravel aggregate, the product is very suitable for late grinding operations in cement plants; used for concrete aggregate, concrete mixing performance/pumping performance and concrete quality are poor , can not meet the application of high-speed rail/highway/hydropower dam and other industries, and can only be used in urban construction and other industries. The same one ton of coarse aggregate is 3-5 yuan lower than the impact crushing price.
AMC MPF series large Impact Crusher
The Impact Crusher uses a high-speed rotating crushing rotor to install multiple fixed blow bars to transmit its own kinetic energy to the material. The material rebounds and impacts the impact plate or the material itself for impact crushing. Therefore, the particle shape of the crushed product is cubic. The content of needle flakes is less, and there is almost no dark crack inside the large material; the content of stone powder and needle flakes in the fine material is less, which is very suitable for the application of concrete aggregate. The concrete mixing performance/pumping performance and concrete quality are good, and can meet The application of high-speed rail/highway/hydropower station dams and urban construction and other industries for concrete aggregates below C40 is called the second-generation sand and gravel aggregate. After the material of the shaping Sand making machine collides with the material, the content of water chestnut and needle flakes in the material is less, which can meet the needs of aggregates for high-performance concrete above C50.
