... into concrete batching machine. Its characteristics is compact structure, small cross section area, light weight, good sealing performance, light ... such as clay powder, coal powder, cement, gravel, grain, small block coal, pebbles and iron scrap.Diameter of screw (mm) 160Transport ... as clay powder, coal powder, cement, gravel, grain, small block coal, pebbles and iron scrap. Screw conveyor for cement