Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . Animation of a schematic Newcomen steam engine. . The earliest of these were in the foundries, but as coal took hold the larger operations.diagram coal crushers,Basics in Minerals Processing - 3:19. Technical data: Cone crushers – HP 3, 4 and 5 series . 3:40. Pulverizing of coal ... equipment design, in systems layout, in wear protection etc. They are.