Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . The earliest of these were in the foundries, but as coal took hold the larger operations became the coal breakers that fueled industrial growth .. The Blake type jaw crusher has a fixed feed area and a variable discharge area.types of crusher for coal,Crushers and Equipment Technology in Mining | Crushers .Jaw and Gyratory crushers are two most important types of primary crushers but . This type of crusher is usually used with soft material such as coal, seeds,.
types of crusher for coal