APP Series Horizontal Impact Crushers Features,  · crusher opening, with safety locks and a proximity switch, allowing operators to safely inspect and maintain each machine. ... Primary Impact Curtain Cast Manganese Steel Secondary Impact Curtain Cast Manganese Steel, White Iron or AR Plate Shaft Solid ...Crusher,  · A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.P&Q University Lesson 7,  · After prescreening, it is transferred to the crusher, from where it is either stockpiled via a discharge conveyor or forwarded to a final screen or a secondary crushing stage. Depending on the specified end product, particles are then either graded by screening units or transported to additional crushing stages by secondary or tertiary impact crushers or cone crushers.Trio APS4034 Series Horizontal Impact Crushers,  · Minerals Trio® APS4034 Series Horizontal Impact Crushers Trio® Series Horizontal Impact Crushers The Trio® APS series horizontal impact crusher has large reduction ratios and a high production capacity, while consistently making an excellent quality cubical