The different types of crushers can be separated into several different categories. There are four ways to crush material, impact, attrition, shear and compression. There are also further classified into primary, secondary and tertiary crushers based on what stage of crushing they complete. Primary crushers receive material directly from the mine or excavation source. Secondary crushers are fed from the primary to reduce the size of the material further. Tertiary crushers are very similar, reducing the size of material fed from a secondary crusher even further. There in fact may be more than three stages of crushing, however any crusher used for any crushing stages at the third stage or beyond is defined as a tertiary crusher.
Jaw crushers are primary crushers, which use compressive force to reduce material size. Other types of crushers include:

  • Impact Crusher/Hammer Crusher: Uses impact force to crush material and is usually used to crush soft and non-abrasive materials. 
  • Roller Crusher: Roller crushers are compression crushers that use two rotating metal cylinders to crush material between them. These types of crushers are typically tertiary crushers, due to their low reduction ratio and are best suited for crushing fine material.
  • Cone Crusher/ Gyratory Crusher: Cone crushers use a gyrating spindle in the centre, which is crushed between a mantle and a bowl liner or concave. This type of crushing is used for with primary or secondary crushing.

Take advantage of Vernice’s mineral processing, screening and crushing contracting today for all mining projects in Western Australia.
Vernice has a dedicated database of crushing and screening companies throughout Western Australia and can find you the right company to assist with your specific project’s needs. We also supply a number of crushing plant hire for wet hire. Contact Vernice today to find out more!

Differences between a jaw crusher and other types of crushers.

Date: 09/08/2019

How does a mobile jaw crusher work?

Vernice mobile jaw crusher and screening

Mobile jaw crusher plant are specialised mining and excavation equipment used in open pit mines, designed for three main purposes, for crushing material, screening/sorting material and conveying material to its destination at the mining site. This material might by rock, sand, soil, earth, limestone, gravel, coal, aggregate etc. The work by applying strong compressive force against the material through a pair of jaws, one stationary fixed jaw and one moveable jaw. The material is fed through a V-shaped crushing chamber into the jaws, where the exit at the bottom is narrower than the opening at the top. The size of the opening is used to determine the size of a jaw crusher, a 32 x 36 jaw crusher therefore has an opening of 32 inches by 36 inches, while a 54 x 54 crusher has an opening of 56 inches by 56 inches.

The space at the bottom of the crushing chamber will determine the size of the crushed material afterwards. The difference is defined as a ratio, such as 6:1 or 8:1. This The crushing power needed to operate the crushing chamber is generated by a motor connected to a flywheel, which transfers inertia from the flywheel to the crusher. Because of the large material sizes fed into mobile jaw crushers, these machines need to be robustly constructed.

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