Solid flight conveying screw for furnace
AssigneeThe International Metals Reclamation Company, Inc.
InventorsWilliam A. Boy, David M. Hoffman
Life of this patent
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Abstract
A fluid cooled conveying screw adapted for rotary hearth furnaces. A plurality of solid alternating single and double flights are affixed to an outer barrel. The single flights are at least partially cladded to withstand the rigors of the furnace. The double flights extend partially down the barrel.
Claims10
A fluid cooled discharge screw adapted for use in a furnace, the screw comprising a proximal end, a distal end, and an outer barrel disposed therebetween, a plurality of spaced continuous single solid flights affixed to the exterior of the outer barrel, a plurality of spaced continuous double solid flights affixed to the exterior of the outer barrel and extending at least partially towards the proximal end of the discharge screw, internal routing means disposed within the outer barrel for directing a fluid coolant to change longitudinal direction within the discharge screw at least twice prior to exiting the discharge screw, a first annular longitudinal internal passage disposed adjacent to the outer barrel and in indirect cooling connection with the solid flights, and cladding at least partially extending along the sides of the single solid flights.
Dependencies are inferred from the claim text.