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Description

Horizontal screw conveyors are the most widely used type of screw conveyor. Used to convey bulk materials from one part of a process to another, horizontal screw conveyors are available in a wide range of sizes, lengths, configurations and materials of construction.

Screw conveyors are typically designed to convey bulk materials at 15, 30 or 45-percent trough loading, depending upon material characteristics of the specific bulk material. As a general rule, trough loading of 45-percent can be used for light, free-flowing and non-abrasive bulk materials. Trough loadings of 15 and 30-percent are typically used for denser, sluggish and more abrasive bulk materials.

The inlet of a screw conveyor is always control fed by another device such as:

• Screw Conveyor
• Screw Feeder
• Belt Conveyor
• Rotary Airlock
• Volumetric or Gravimetric Feeder

The recommended location for the drive unit is on the discharge end of a screw conveyor which pulls the bulk material to the drive end. With this arrangement, each screw section is put in tension as the bulk material is conveyed toward the discharge of a screw conveyor, reducing wear and fatigue on the conveyor components.

Advantages of Using Screw Conveyors

• Ideal for conveying dry to semi-fluid bulk materials – free flowing to sluggish
• Cost-effective when compared to other conveying devices such as belt, pneumatic or aeromechanical
• Efficiently distributes bulk materials to various locations using multiple inlet and discharge points
• Totally enclosed for dusty, corrosive or hazardous environments