1) Long working life 2) High Capacity 3) Require less maintenance 4) Easy operation 5) High functionality Spiral /screw conveyor is suitable for transporting powder, granular and small-block materials, such as coal, gravel, sand and lump coal, cement, cereal, and so on. And is not apply to transportation of perishable, large viscous , easy-to-caking materials.The main technical parameters of ...