Crushers are machines used to reduce the size of rocks, gravel, or other materials in aggregate processing, construction, and mining. Here are the main types of crushers, along with a brief description of each:
Jaw crushers use a pair of vertical jaws, one stationary and the other moving, to crush materials. The material is fed into the top of the jaws and is compressed as the movable jaw moves towards the stationary jaw, crushing it into smaller pieces. Jaw crushers are commonly used for primary crushing.
Gyratory crushers consist of a concave surface and a conical head; both surfaces are typically lined with manganese steel. The inner cone is slightly eccentric, which allows the gap between it and the concave to change, crushing the material. They are used for primary or secondary crushing of large volumes of hard materials.
Cone crushers are similar to gyratory crushers in that they use a mantle that gyrates within a concave bowl. Unlike gyratory crushers, cone crushers are more often used in secondary, tertiary, and quaternary crushing stages. The material is crushed by compression between the mantle and the bowl liner.
Impact crushers utilize the impact principle. They come in two main types:
Horizontal Shaft Impact (HSI) Crushers: These use hammers or blow bars attached to a horizontal rotor to crush the material as it strikes a stationary anvil or breaker plates.
Vertical Shaft Impact (VSI) Crushers: These use a high-speed rotor to project material against a wear-resistant anvil or rock shelf, breaking the material along its natural fissures.
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