Industrial electric heating furnaces – Arc furnace device – Furnace body detail
Reexamination Certificate
2006-02-17
2010-11-09
Hoang, Tu B (Department: 3742)
Industrial electric heating furnaces
Arc furnace device
Furnace body detail
C373S078000, C373S079000
Reexamination Certificate
active
07830947
ABSTRACT:
To increase the efficiency in a furnace installation for melting down metallic or metal-containing charge materials, where an electrode system with a roof (6) for operating the melting-down process mainly with secondary energy can be swung into position on a lower shell part (14, 15) of a furnace (A, B), an upper shell part (17) can be swung into position on the lower shell part (14, 15) to form a premelting vessel (16). The upper shell part (17) includes a vessel wall (18) that substantially upwardly extends the vessel wall of the lower shell part (14, 15) in and additionally has a roof (7).
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Trenkler H: “Energy-Saving DC Twin Shell ARC Furnace for Melting . . . ”, ABB Review, ABB Asea Brown Boveri, Zurich, Ch, No. 9/10, 1996, pp. 18-27.
Hoang Tu B
Lucas & Mercanti LLP
Nguyen Hung
SMS Siemag Aktiengesellschaft
Stoffel Klaus P.
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