High-temperature screw conveyors for hot materials
The high-temperature Spiralfeeder flexible screw conveyors (photo) accept heated powders, pellets and other bulk materials at infeed and transfer them downstream. Often set at the discharge end of fluidized-bed dryers, ovens, rotary kilns and other process-heating machinery, the high-temperature conveying systems feature a carbon-steel or optional stainless-steel outer tube and inner steel screw joined with high-temperature silicone and Teflon seals and gaskets throughout the design. A proprietary approach distances the drive mechanism from the hopper to minimize exposure to high temperatures. Suitable for food and pharmaceutical ingredients, chemicals, aggregates and other materials, the heat-resistant conveyor is recommended when the material temperature at infeed reaches 120°F. The screw conveyors are proven to safely transfer a variety of coarse and fine solid and viscous materials with temperatures up to 400°F. — Automated Flexible Conveyor, Inc., Clifton, N.J.