... high technology 4. less maintenance Screw Conveyor1. characteristics Screw conveyor novel structure, technical index is advanced, the head, tail ... ash, sand etc, material temperature 200 degrees Celsius. Screw conveyor is unfavorable conveying easy metamorphism, big viscosity, easy to ... make the spiral machine can't work normally. Screw conveyor spiral diameter from 200 mm to 500 millimeters, a ...