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Comment PDF Solids Handling

Cover Story: Move Difficult-to-Handle Bulk Materials with Flexible Screw Conveyors

By David Boger, Flexicon Corp. |

Convey tough bulk materials that tend to pack, cake, smear, break apart or fluidize, and prevent separation of blended products Flexible screw conveyors are suitable for use with most bulk materials, from sub-micron powders to large pellets, both free-flowing and non-free-flowing. They are capable of conveying bulk materials at any angle, moving over or under obstructions and through small holes in walls or ceilings (Figure 1). These conveyors also have the advantage of simple construction, low space requirements, reliability of operation and favorable economics. Although alternate conveying methods may be preferable depending on the application parameters of a project, this article focuses specifically on flexible screw conveyors for materials that are problematic to convey. Difficult-to-convey materials When engineering a flexible screw conveyor for difficult-to-handle materials, it is necessary to establish the materials’ physical characteristics, flow properties, temperature, moisture content, inherent hazards and allowable degree of degradation, as well as the material source and destination, conveying rate, distance, cleaning requirements, plant layout and economics. Flexible screw conveyors are appropriate for use with: Cohesive…
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