Coal & Coke Pulverizers

Coal is obtained by mining and needs to be milled and ground for bringing it to usable form. In the first stage hammer mills and crushers are used to down size the rocks. The second stage grinding is done mainly by the roll crushers and lately cone crushers.

Roll Crushers - They are compression type crushers and are easy to maintain. It has two rollers rotating about a shaft, towards the gap between the rolls. This gap between the rolls determines the size of the final product. The ungrounded particles can be about four times the size of the gap. Coal is drawn in the gap by the rotation of the rolls and the friction with it. The rolls may have teeth on the surface to improve the quality.

Cone Crushers - Gyratory cone crusher is now more commonly used for coke and coal pulverizing. The size depends upon the size of the inlet and the size of the raw product. It has a central vertical spindle that is free to rotate about its axis. Coal is crushed between the spindle the fixed head.