A crusher is a machine that uses the high-speed impact of hammers and the rebound action of impact plates to repeatedly crush materials. The hammers are fixed to a high-speed rotating rotor, and several impact plates are arranged at different angles along the crushing chamber.
When material enters the impact zone of the hammers, it is first crushed by the initial impact of the hammers and simultaneously gains kinetic energy, propelling it at high speed towards the impact plates. After being crushed again by collisions with the impact plates, the material is bounced back to the impact zone of the hammers and subjected to impact again. This process is repeated until the material is crushed to the desired particle size and discharged from the machine.
Compared to hammer crushers, impact crushers have a larger crushing ratio and can more fully utilize the high-speed impact energy of the entire rotor. However, because the hammers wear very easily, its application in crushing hard materials is limited. It is typically used for coarse, medium, or fine crushing of brittle materials of medium hardness or less, such as limestone, coal, calcium carbide, quartz, dolomite, iron sulfide ore, gypsum, and chemical raw materials.
