Glossary of Quarry Equipment

Part Two of our Quarry Equipment Glossary

Dragline - An excavator with a bucket facing backwards which sits on top of the material it is excavating. It uses a pulley system to fill the bucket, which it then swings away and dumps.

Hammermill - A rock crusher which uses hammers on a rapidly rotating axis.

Jaw crusher - A crusher that breaks material by squeezing it between two jaw plates, one moveable and one stationary. The jaws are positioned so there is a wide opening at the top known as the gape and a narrow discharge aperture at the bottom set to the desired output size. Normally used for the processing of hard primary, secondary or recycled feedstock such as rock and concrete.

Loaders - similar to tractors, loaders have deep blades and the front end loader mostly picks up dirt and rocks. They can also push rocks and dirt around. The main job of the loader is to pick up rock and move it to different locations or to another piece of quarry equipment, like a crusher.

Primary crusher – This crusher is used in the first stage of crushing to reduce rock to a size that can be processed by secondary or tertiary crushers.

Secondary crusher – A crusher that receives feed from the primary crusher, further reducing rock in size.

Short head crusher - A second- or third-stage crusher.

Single impeller impact breaker - A crusher in which the incoming feed drops vertically through the chamber, strikes rotating impeller bars and is then impacted against breaker bars within the chamber.

Tertiary crusher - Crusher that receives feed from the secondary crusher, further reducing rock in size.

If you are interested in learning more about N.H. Greaves & Co Ltd’s fantastic range of quarry equipment then please give us a ring on 01709 582381 and we will be more than happy to help.

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