Title: Metallurgical shaft furnace

Abstract: A metallurgical shaft furnace for producing metal from a charge which enhances the preheating capacity of upwardly flowing gases in an upper preheating portion of the furnace, the upper portion being formed from concentric sections which increase in diameter from the uppermost section to the lowermost section of the preheating portion of the furnace. Troughs are formed where adjacent sections meet to form cooling rings around the upper portion, the rings projecting inwardly from the furnace wall. The lower portion comprises a melting portion having tuyeres, a hearth and tap means. Vertical cooling conduits may be provided in the lower section with conduits adjacent each tuyere terminating above the tuyere to prevent damage to the conduits.

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Inventors: Obenchain, Richard F. (Pittsburgh, PA, US)

Application Number: 698355
Filing Date: 1976-06-22
Publication_date: 1977-03-01
Assignee:
Primary Class(es): 266/192 266/197, 266/280
Other Classes:
US Patent Ref:

964885

Jul, 1910

Scott

266/192.

Other Refs:
Primary Examiner: Dost, Gerald A.
Assistant Examiner:
Attorney: Parmelee, Miller, Welsh & Kratz