... on, mainly used to conveying and enhance the vertical transmission for a variety of powder, granular and small block, etc.The head ... coal off, grain, ore, feed, pulp and other materials, suitable for horizontal or inclined conveying powder, granular and small-block materials ... is less than 200 °C. Spiral conveyor is not suitable for perishable, viscous, easy caking materials. Feature of screw conveyor ...