Aluminum melting furnace

C - Chemistry – Metallurgy – 22 – B

Patent

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53/236, 307/28

C22B 4/08 (2006.01) C22B 21/00 (2006.01) F27B 3/08 (2006.01) F27B 14/06 (2006.01) F27D 99/00 (2010.01) F27B 14/00 (2006.01) F27B 14/08 (2006.01)

Patent

CA 1068486

Abstract of the Disclosure An electrically energized aluminum melting furnace comprises a vessel for supporting molten aluminum and a roof and upper wall structure cooperating with side walls of the vessel to define a heating chamber above the molten aluminum. A plurality of un- shielded resistance heating elements are supported by the roof and upper wall structure above the molten aluminum. The molten aluminum has access through a submerged opening to a charging well to which unmelted aluminum is periodically charged without danger that molten aluminum will splash upon the heating elements. Heat conducted from the heating chamber through the body of molten aluminum residing in the vessel is utilized to melt in the charging well the aluminum charged thereto. The melted aluminum in the changing well is permitted to flow through the heating chamber and through a submerged opening to a hot metal well from which hot metal may be withdrawn by any of numerous techniques. The heating chamber is so arranged that an oxide skin is preserved at the surface of the molten aluminum residing within the heating chamber, the oxide skin effecting an efficient transfer of radiant energy received from the resistance heating elements to the molten aluminum. The aforementioned roof and upper wall structure is rested upon furnace walls so as to allow a vertical growth of the furnace walls.

243599

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