Screw Conveyor Heavy Duty Customizable High Efficiency

Screw Conveyor Heavy Duty Customizable High Efficiency

Product Overview

The LS series screw conveyor is a heavy-duty, continuous conveying system designed for the horizontal or inclined transport of dry, free-flowing powders, granules, and small lump materials. It is the standard discharge and transfer device beneath baghouse dust collectors, cyclone separators, silos, and bulk material handling hoppers. The conveyor consists of a rotating helical screw blade inside a sealed U-shaped or tubular trough, driven by a geared motor. Material entering the trough is pushed along the axis by the rotating screw, discharging at the outlet. The enclosed design prevents dust escape, protects the material from contamination, and allows operation at temperatures up to 200°C. LS series conveyors range from 200 mm to 1,250 mm in screw diameter, delivering volumetric throughputs from 2.8 m³/h to over 520 m³/h. The modular construction — with flanged end bearings, intermediate hanger bearings, and bolted trough sections — simplifies installation and maintenance. For dust collector ash handling, silo discharge, and process material transfer in the cement, chemical, metallurgical, power, and grain industries, this screw conveyor provides reliable, dust-free material movement with minimal operator attention.

Cause: Open Belt and Drag Conveyors Create Dust and Maintenance Problems

Open belt conveyors spill material, generate dust, and require constant housekeeping. In dust collector ash handling, an open conveyor exposes operators to respirable dust and allows collected material to become airborne again. Drag conveyors are noisy, prone to chain stretch and wear, and difficult to seal. Bucket elevators handle vertical lifts but are complex and costly for horizontal runs. Facilities need a simple, sealed conveying method that moves dust and granular material without leakage, without excessive maintenance, and at a predictable throughput.

Solution: Sealed Screw Conveyor with Heavy-Duty Construction

The LS screw conveyor solves these problems through its fully enclosed trough design. All material movement occurs inside a sealed housing, preventing dust emission and protecting operators and the environment. The rotating screw has no chains or belts to stretch, slip, or break. The gearmotor provides fixed-speed or variable-speed operation matched to the required throughput. Hanger bearings with replaceable liners support the screw at intervals, ensuring alignment and preventing trough wear. The screw and trough are available in carbon steel or stainless steel, with wear-resistant liners for abrasive materials. The result is a quiet, dust-tight, low-maintenance conveyor that reliably transfers material from point to point.

Specifications

*Standard capacities are for horizontal conveying of free-flowing material with a filling factor of 0.45. Capacity varies with screw speed, material density, and incline angle. Custom lengths, diameters, and materials are available.*

Application

• Dust collector hopper discharge and ash conveying.
• Cement, lime, fly ash, and mineral powder transfer.
• Chemical powder and granular material conveying.
• Coal dust, carbon black, and pigment handling.
• Grain, feed, and food processing material transfer.
• Sludge and dry bulk material unloading from silos.

How It Works

The geared motor rotates the helical screw inside the sealed trough. Material enters through the inlet at one end (or at intermediate points) and is pushed along the trough by the advancing screw blade. The material is continuously displaced forward with little internal mixing. At the outlet, the material discharges by gravity into the next process stage. The fill level is maintained below the screw shaft, and the screw rides on end bearings and replaceable hanger bearings. The sealed covers allow controlled venting and dust-free operation.

How To Choose

1. . Determine the required capacity (m³/h) and material bulk density.
2. . Select the screw diameter from the table based on the required capacity at a mid-range speed.
3. . Specify the material characteristics: free-flowing, abrasive, sticky, or high-temperature. Abrasive materials require wear-resistant liners; high-temperature service requires appropriate bearing and seal materials.
4. . Confirm the conveyor length and incline angle. Capacity decreases as incline angle increases; consult our engineers for inclined applications.
5. . Select the construction material. Carbon steel is standard; stainless steel is used for food-grade or corrosive service.

FAQ

1. . Can the screw conveyor be used for inclined transport?
   Yes. LS series conveyors can operate at an incline, but capacity decreases as the angle increases. For angles above 20°, consult our engineers for the appropriate screw design and speed.
2. . What materials cannot be handled by this conveyor?
   The screw conveyor is not recommended for highly sticky, easily compacted, or very wet materials, or for materials that degrade when compressed. Very high temperatures above 200°C require special construction.
3. . How is the conveyor sealed against dust leakage?
   The trough is fully enclosed with bolted covers and gaskets. Shaft seals at the inlet and outlet prevent dust escape. For very fine dust, purge air connections can be added.
4. . How do I maintain the screw conveyor?
   Check the gearmotor oil level periodically. Inspect hanger bearings and replace the liners when worn. Keep the trough covers sealed and remove any material buildup inside the trough during scheduled shutdowns.
5. . Can the speed be adjusted?
   Yes. The conveyor can be supplied with a variable frequency drive to adjust the screw speed and match the throughput to the actual material flow.
6. . How do I order a screw conveyor?
   Provide the material, required capacity, conveyor length, incline angle, and nearest seaport. We return a complete quotation with dimensional drawings, lead time, and shipping cost within one business day.