Screw conveyor is a continuous conveying equipment that uses spiral rotation to push materials, which is suitable for conveying flour, cereal, cement, fertilizer, ash, sand, stone, pulverized coal, small lump coal and other materials. Due to the small effective circulation area in the body, the screw conveyor is not suitable for conveying materials that are easy to deteriorate, too viscous and easy to caking. Screw conveyor can be arranged into horizontal or inclined, screw conveyor if need to change the direction of transportation, should make special orders.