The impact crusher utilizes a plate hammer on a high-speed rotating rotor to generate high-speed impact and breakage of the material fed into the crushing chamber, and causes the broken material to be thrown at a high speed in the tangential direction toward the counterattack plate at the other end of the crushing chamber, again After being broken, and then rebounding from the counterattack to the hammer, continue the above process. During the round trip, there is also a mutual impact between the materials. As the material is hit by the hammer, the impact with the counterattack and the collision between the materials, the material is continuously cracked, loose and pulverized. When the material particle size is smaller than the gap between the counterattack plate and the hammer, it is discharged.
The main crushing process of the material is carried out in zone I of the rotor. After the material is subjected to the first impact, it is repeatedly thrown back and forth in the machine. At this time, due to local damage and torsion, the material no longer performs regular movement according to the pre-trajectory, but repeatedly impacts at different positions in the I zone, and then the material enters the II zone and is further crushed by impact.
The size of the gap formed between the counterattack surface and the rotor has a certain influence on the particle size composition of the finished product. The increase of the crushing chamber plays a role in uniform product size and reduction of large particles, but the power consumption increases and the production capacity decreases. Usually used as a crusher for crushing, with 1- to 2 crushing chambers for fine crushed impact crushers, with 2-3 or more crushing chambers.
According to its structural characteristics, the impact crusher can be divided into a single rotor impact crusher and a double rotor impact crusher. According to the direction of the rotor, the single-rotor impact crusher is divided into two types: reversible rotation and irreversible rotation. The double-rotor impact crusher can be divided into three types: the same direction rotation type, the reverse rotation type and the opposite direction rotation type. According to the internal structure, the single-rotor impact crusher is divided into two types: a uniform raft and a uniform raft. The double-rotor impact crusher can be divided into two types: the rotor is at the same level and the rotor is not at the same level.
The hammer and rotor of the impact crusher are rigidly connected and have a large crushing chamber to allow material to have a certain amount of space. The machine uses a high-speed rotating rotor to impact the material. Under the action of the plate hammer, the material is not only broken, but also obtains large speed and kinetic energy, impacting the impact plates on the frame in the crushing chamber, or in the block. The impact occurs between each other to achieve material comminution. The impact crusher is superior to the cage crusher and the hammer crusher in many aspects such as production capacity, power consumption, maintenance and repair. The impact crusher is not only simple in structure, power consumption is saved, the crushing ratio is large, and the product granularity is uniform. The aspect has unique advantages. So it has been widely used in metallurgy, coking, chemicals, building materials, refractories and other industrial sectors.
The impact crusher has a large crushing ratio of about 40 and a maximum of 150. The coarse crusher feeds up to 2m3 with a counter crusher. The product size is less than 25mm, which can be directly into the mill. The product size of the crusher with a counter crusher is less than 3mm. The impact crusher can be used to reduce the number of broken sections.
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