Coal is composed primarily of carbon along with variable quantities of other elements, chiefly sulphur, hydrogen, oxygen and nitrogen. Coal is a readily combustible black or brownish-black sedimentary rock normally occurring in rock strata in layers or veins called coal beds. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.

The extracted raw coal pellet is initially uncovered to a high-intensity magnet, ordinarily suspended more than the incoming belt conveyor which pulls the iron impurities from the coal pellet. This magnet at times follows the breaker, but typically precedes a screen-crusher. The coal pellet then goes towards the breaker, which can be a considerable cylindrical shell with interior lifting blades; the shell is perforated with holes to permit passage of compact components. The breaker rotates on a horizontal axis, getting supplies to a single end, tumbling it since it passes by the holes inside the shell, and permitting the challenging, huge, unbroken materials to pass out the rear of the machine. Many sorts of crushers might be identified for coal preparation equipment.

Different types of crushing circuit involves various crushing machines, the primary crushing process circuit usually includes only a crusher and auxiliary equipment of vibrating feeder and conveyor. Except the prime equipment, secondary and tertiary crushing circuit also have impact crusher or cone crusher and vibrating screen or storage bins.

Coal crushing plant is important to coal mining, crushing is the primary stages in coal processing where the extracted coal is fed to coal crushing plant in order to reduce the size for further processing process. Coal crushing plant is widely used in coal mining process. In general, the equipment used in coal crushing plant includes vibrating feeder, coal jaw crusher, impact crusher, cone crusher, hammer crusher, vibrating screen and belt conveyor.

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