Screw Feeder and Transfer Screw Conveyor for High Temperature Cement Kiln Dust

General Description

Customer was in need of a screw feeder and screw conveyor to incorporate into their dust kiln system at a new cement plant. The screw feeder was to bolt directly to the system collection hopper and meter hot cement dust into a transfer screw conveyor where it was conveyed nearly 90 feet for further processing.

Design Parameters

KWS Advantages

KWS worked directly with engineers at Cal Portland to design a cement mill duty screw feeder and conveyor to withstand the harsh environment and operating conditions. The screw feeder inlet was designed to match the exiting collection hopper. The screw feeder was designed to be reversible to allow for easier cleanout of the dust hopper under an upset condition. Using our 3D design modeling, KWS was able to integrate all of the auxiliary equipment into the system layout. The 3D modeling allowed for easy field assembly of all of the components in the system.

Special Features

The exclusive KWS sliding pedestal style trough end was used to compensate for thermal expansion experienced from the high temperature of the material and ambient conditions. The screws were designed to expand axially without adding any undue stresses to the drive units or bearings. KWS also incorporated all heavy duty construction including abrasion resistant flights, high-torque drive units and heavy oversized center pipe to minimize downtime, maintenance, and costly repairs that would be detrimental to the plant. Since the system was under negative pressure, both the screw feeder and screw conveyor were designed with special shaft seals, troughs, trough ends and covers to hold pressure and eliminate fugitive air from getting into the system and disrupting the process.