The International Metals Reclamation Company, Inc.

John A MacDougall

John K Pargeter

Francisco Olano

A countercurrent fluid cooled conveying screw is disclosed. Suitable for furnace applications, the screw includes an outer shaft spatially circumscribing an inner tube. A plurality of hollow, fluid cooled flights are affixed to the outer shaft and are in fluid flow communication with coolant coursing through the screw. The coolant is first directed through the flights and then back through the outer shaft before exiting through the inner tube.

Conveying screw for furnace

Discloses an improvement in furnacing objects on the top surface of an impervious rotating hearth in a directly fired rotary hearth furnace by the use of fuel burning with a luminous flame e.g., coal.

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Pittsburgh, PA, United States of America

John A MacDougall