A 5:1 ratio means a 5" rock is crushed to a 1" rock. Remote Control Tipping Grizzly The grizzly can be cleared by use of a remote control by raising one side vertically, causing oversized material to dump off. Return Idler Idlers mounted underneath a conveyor to support the belt. Rock
· iron ore screening plant. Screening is carried out at various stages in the crushing process. Screens are basically box frames into which sheets of screen meshes of the required apertures are inserted, clamped and tensioned. Screens are usually "multideck",, two or more screen meshes are stacked vertically within the screen frame.