Editorial Feature

Jaw Crusher - Mining Fundamentals

A jaw crusher is one of the primary machines that is used in the mining industry. In a jaw crusher, rocks are broken by the action of steel plates. A jaw crusher breaks rocks by using a compressive force of less than 320MPa. A jaw crusher is best suited for crushing minerals with a large amount of clay.

Working Principle of a Jaw Crusher

The jaw crusher consists of two plates arranged to form a ‘V’ shape. One of the steel plates is fixed, while the other is movable. The movable plate is moved forward and backward towards the fixed plate; as a result, the mineral chunks are shattered between the plates and crushed to smaller pieces. When the broken chunks are sufficiently small, they fall out of the bottom opening of the crusher.

Types of Jaw Crusher

Jaw crushers are classified based on the position of the pivoting of the movable plate. The different types of jaw crushers are:

  • Blake Crusher – This type of crusher has the movable jaw fixed at the upper position
  • Dodge Crusher – In this type of crusher, the movable jaw is fixed at the lower position
  • Universal Crusher – In this type, the movable jaw is fixed at the intermediate position

Advantages

Some of the advantages offered by jaw crushers are listed below:

  • Energy saving
  • Higher feed capacity
  • High reduction ratio and uniform size of the final product
  • Low noise and lesser dust
  • Simple construction and easy maintenance

Sources and Further Reading

 

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