Crushers and Their Types Apr 3, 2015 These are (i) primary crusher, (ii) secondary crusher, and (iii) tertiary crusher. The outer frame is generally made of cast iron or steel.
A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. In industry, crushers are machines which use a metal surface to break or . material, with primary and secondary crushers handling coarse materials, and tertiary and quaternary crushers reducing ore particles to finer gradations. View quotes