Screw conveyor is divided into shafted screw conveyor and shaftess screw conveyor. Also can be divided into U shape screw conveyor and O shape screw conveyor .
Shafted screw conveyors are widely used in all kinds of industries . Such as building materials, chemical industry, electric power factory, metallurgy filed, coaling,mining,grains,etc . Shafted screw conveyors are suitable for transporting substance in horizontal or incline working. Fine powders,particle and small bulk pieces can be transported by screw conveyors . Such as coal powder, fly dust, dust slag,cement, grains,corns. Usually these materials’ temperature is less than 200 centi degree. However, shafted screw conveyor is not available for transporting materials which are easy to be metamorphic, strong sticky and easy to cake. Shafted screw conveyor is transported and rotating substance under driving by motors,which push substance forward so as to reach the aim of transportation. By the way ,shafted screw conveyors can transport horizontally, incline and vertically, which is with simple structure, small sectional square, good sealing,etc.