Crusher andcone crusherissuitablefor crushinghard rockblock(compressive strength of150-250Mpa);gyratorycrusheris suitable forcrushing hard(compressive strengthabove100MPa)andmedium hardness(compressivestrengthof about100MPa)chunks of rock.Hammer crusheris suitable forcrushing mediumhardnessofbrittle rock(ultimate compressive strengthless than100MPa);roll crusheris suitable forcrushing mediumhardness,toughnessrock(ultimate compressive strengthof about70MPa). The actual selection,depending on the circumstances, you should alsoconsider the following factors: The physical propertiesofthematerial,suchasfriability, viscous,waterandsedimentcontentand maximumfeedsize, etc.; Thetotal productionoffinishedandgrading requirements,to select thetypeofcrusherand production capacity; 3technical and economic indicators,so not onlyin line withthequalityand quantityrequirements, easy to operate, reliable, andcost savings.