Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. ... Gyratory crushers can be used for primary or secondary crushing. The crushing action is caused by the closing of the gap between the mantle line.a primary and secondary crusher,a primary and secondary crusher,Crushers and Their Types | ispatguruApr 3, 2015 . These are (i) primary crusher, (ii) secondary crusher, and (iii) tertiary crusher. The primary crusher receives material directly from run of mine.
a primary and secondary crusher