Single Roll Crusher

Single Roll Crusher

The crushing is done between the roll and the back plate or anvils (fig-3.16) which are pivoted at the top edge and adjustable at the point of discharge. The adjusting bolts can be spring loaded if the roll is fixed so as to permit the passing of tramp metal. It is an effective breaker of soft to medium hard limestone and shale, but is not suited to blocky feeds unless of a friable nature. During the crushing process material will ride on the roll and there will be considerable slip between the material and the top of the teeth. This will lead to excessive wear if the material has other than low percentage silica. The machine will turn out a product with less percentage fines than either the jaw or gyratory crushers. Size of product is governed by the distance between the roll and the tip of the lower end of the anvil. This machine is essentially a primary crusher and works most efficiently when set for a medium or coarse product. Single roll crusher crushes by shearing action.