Inclined High Temperature Screw Conveyor for Flyash

General Description

Standley Batch Systems, located in Cape Girardeau, MO, is a leading supplier of bulk material handling systems for the concrete and construction industries. Their equipment is engineered to store, meter, transfer, and blend cementitious materials such as cement, sand, aggregate, and fly ash with precision and reliability.

Standley required an inclined screw conveyor to transfer high temperature fly ash from a storage vessel to downstream processing equipment. The system would operate intermittently while maintaining consistent performance and structural integrity. Due to the elevated temperature of the fly ash and the large conveyor diameter required for capacity, special consideration was given to thermal expansion, abrasion resistance, and elimination of hanger bearings to ensure long term reliability and reduced maintenance.

Screw Conveyor Transfers High Temperature Fly ash from a Storage Vessel to Downstream Processing Equipment

Design Parameters

Product Type: Fly Ash
Material Density: 62 Lbs. per Cubic Foot
Capacity: 2,600 Cubic Feet per Hour
Design Temperature: 350-Degrees F
Duty: Intermittent

KWS Advantages

KWS worked closely with Standley Batch Systems to design a heavy-duty inclined screw conveyor capable of handling high temperature fly ash at the specified capacity. By leveraging decades of experience with abrasive and cementitious materials, KWS engineered a screw conveyor that eliminated internal hanger bearings, significantly reducing maintenance and potential failure points. KWS provided detailed engineering drawings using 3D modeling software and ensured the unit integrated seamlessly into Standley’s system layout.

KWS Special Features

The inclined screw conveyor was designed with a one-piece screw mounted on large diameter pipe to accommodate minimal deflection and eliminate the need for intermediate hanger bearings. Removing hanger bearings improves reliability in fly ash applications by eliminating components that are prone to wear and material buildup. This design also improves material flow and reduces internal obstructions.

KWS supplied a KWS slider base trough end on the tail end to accommodate axial thermal expansion. If not accounted for, thermal expansion will cause excessive stress and fatigue loading, leading to premature failure of the screw. The KWS slider base trough end is designed to handle thermal expansion and can account for axial expansion up to 4 inches.

Because fly ash is highly abrasive and conveyed at elevated temperatures, the trough was equipped with AR400 abrasion resistant liners to significantly improve wear life. AR400 liners provide superior hardness and durability compared to standard carbon steel, protecting the housing from premature wear and extending the overall service life of the conveyor. The liners are replaceable, allowing Standley to perform cost effective maintenance without replacing the entire housing assembly.

Customer Testimonial

“The KWS inclined screw feeder installed with no issues! We appreciate your engineering expertise, quality, and overall service. Working with KWS is easy!”

Justin Pattengill, Operations Manager – Standley Batch Systems