Impact crushers tend to produce more "fines" than Jaw crushers. Jaw Crushers have two opposing ribbed panels, or jaws, with one jaw moving forward and back to crush raw material against the fixed jaw. Only material that has been crushed to a size equivalent to the opening at the bottom of the jaws falls through the bottom of the machine.
Jaw crusher A machine in which rock is broken by the action of steel plates. Jig A piece of milling equipment used to concentrate ore on a screen submerged in water, either by the reciproing motion of the screen or by the pulsation of water through it. K. Kimberlite A variety of peridotite; the most common host rock of diamonds. L