Cone Crushers – Explained

If you have been in the quarry industry for a long time you will already have some knowledge of cone crushers. For those of you in the dark we offer a detailed explanation of the importance of cone crushers within the quarry industry.

Quarrying methods used for quarrying stone varies according to the purpose the stone is being quarried for. When the quarried stone is going to be used as an industrial raw material, for example when limestone is used for cement, the rock is shattered by means of explosives. These rock fragments are then further crushed by specialised quarry equipment in the form of cone crushers. Some of the types of crushers used in aggregate processing include:

• Compression type crushers, such as jaw and cone crushers
• Impact type crushers, such as vertical shaft impactors

The action of crushing involves the breaking, crushing, or grinding by mechanical means using specialised crushers, of rock, stone or recycled materials, for direct use or further processing. The main reason for the crushing of the stone is to reduce the material to be a specified size range.

Most types of crusher are available as mobile crushing units. Cone crushers are comprised of a vertical conical chamber with a feed opening at the top and a vertical conical crushing head inside. The crushing head is lined with protective pieces known as the mantle. The chamber is also lined with protective pieces, commonly called concaves. The material enters the crushing chamber through the feed opening at the top. The feed plate distributes the stone equally around the mantle and concave. As the mantle oscillates, the material is crushed by the squeezing action between the mantle and concave. Sizing of the stone can be changed by increasing the closed side setting to generate large stone or by decreasing the closed side setting to make smaller stone. Feedstock can be reduced via crushing in a number of phases, called primary, secondary, and tertiary. Crusher selection affects particle size and shape.

N.H. Greaves & Co Ltd, has four decades experience as a leading U.K. manufacturer and distributor of new and used quarry plant incorporating complete installations for the U.K. and global markets. If you would like any further information about the range of quarry equipment, including cone crushers, we supply then please do not hesitate to contact us on 01709 582381.

ARTICLES INDEX