... process layout, easy movement and operation security. This series screw conveyor can transport all kinds of powder, granular, small ... powder, coal powder, cement, gravel, grain, small block coal, pebbles and iron scrap.Diameter of screw (mm) 160Transport length (m) ... materials such as clay powder, coal powder, cement, gravel, grain, small block coal, pebbles and iron scrap. Screw conveyor for cement