Crushers Information

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Industrial crushers reduce large rocks, ore, or waste materials to smaller sizes. They are the first level of size reducer; further granularization occurs in grinding mills or pulverizers.

Crushing devices hold feed material between two solid surfaces and apply sufficient force to fracture or deform that material. Primary crushing operations takes boulder size feeds (20 to 100 inches) and reduces the material to secondary crusher feed size (1 to 20 inches) or mill feed size (0.5 to 3 inches). This video illustrates single- and double-toggle jaw crushers.

Video credit: Agg-Net/QMJ Publishing

Types of Industrial Crushers

There are several types of industrial crushers available to industrial buyers. These types include:

Cone or gyratory crushers insert feed via a cone-shape bowl and crush it with a spinning or gyrating head.
HPGR (high pressure grinding rollers), roll/roller crushers, or mineral sizers use two large rollers or a roller and a flat surface. The rolls can be serrated, toothed, or smooth.

Vertical impactors use the weight and friction of the feed (autonomous) or add hammer-like processors.
Horizontal shaft impactors spin feed against various surfaces.
Jaw crushers feed materials between fixed and reciprocating plates. Blake, swing, overhead eccentric and Dodge jaw crushers are some of the variations available.
Bucket crushers both scoop and reduce materials.

Video Credit: Mid Atlantic Hammer

The following table compares types of crushers.

Type	Hardness	Abrasion limit	Moisture content	Reduction ratio	Main use
Cone crushers	Medium hard to very hard	Abrasive	Dry or wet, not sticky	3/1 to 5/1	Quarried materials, Sand & gravel
Gyratory crushers	Soft to very hard	Abrasive	Dry to slightly wet, not sticky	4/1 to 7/1	Heavy mining, Quarried materials
Horizontal shaft impactors	Soft to medium hard	Slightly abrasive	Dry or wet, not sticky	10/1 to 25/1	Quarried materials, sand & gravel, recycling
Jaw crushers	Soft to very hard	No limit	Dry to slightly wet, not sticky	3/1 to 5/1	Heavy mining, Quarried materials, sand & gravel, recycling
Mineral sizers	Hard to soft	Abrasive	Dry or wet and sticky	2/1 to 5/1	Heavy mining
Vertical shaft impactors (autogenous)	Soft to very hard	No limit	Dry or wet, not sticky	2/1 to 5/1	Quarried materials, sand & gravel
Vertical shaft impactors (shoe and anvil)	Medium hard to very hard	Slightly abrasive	Dry or wet, not sticky	6/1 to 8/1	Sand & gravel, recycling

Table Source: Wikipedia (Crushers)

Specifications and Features

Important specifications and features when selecting industrial crushers include:

Feed size, material, and hardness must be considered.
Output size ranges.
Crushers accept dry or wet input, or both.
Crushers are feed in batches or continuously.
Some units are mobile.

Video credit: Mid Atlantic Hammer

Applications

Industrial crusher from Sturtevant Crushers are used in the mining, metallurgical, construction, chemistry, petrochemical, transportation, and energy industries.

References

SBM Stone Crusher Machine Products

Image credits:

Bauermeister | MMD Design and Consultancy | Sturtevant

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Crushers Information

Types of Industrial Crushers

Specifications and Features

Applications

References

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