LS series screw conveyor for powdery materials Hermetical structure Continuous duty ISO9001:2008 IntroductionLS screw ... , fertilizer, coal off, grain, ore, feed, pulp and other materials, suitable for horizontal or inclined conveying powder, granular and small-block ... than 200 °C. Spiral conveyor is not suitable for perishable, viscous, easy caking materials. Feature of screw conveyor is by: simple, ...