Industrial electric heating furnaces – Arc furnace device – Electrode
Reexamination Certificate
2005-03-29
2005-03-29
Hoang, Tu (Department: 3742)
Industrial electric heating furnaces
Arc furnace device
Electrode
C373S088000
Reexamination Certificate
active
06873641
ABSTRACT:
A electrode and method for periodic elongation of the electrode of an electric arc furnace, includes screwing to the electrode column, a new electrode and a nipple with a longitudinal hole and a metal rod therein. The rod melts at working temperatures of the furnace and fills cavities in the joint between the electrodes and nipple, as well as partially filling an additional cavity in the body of the electrode. A gas mixture from the additional cavity is free of liquid metal being drawn to the working area of the furnace through the holes in the body of the electrode. The electrode is made with additional cavities, placed along the central axis in the bottom of the threaded sockets, the cavities having different diameters and depths and one of them being connected to the external surface of the electrode by holes.
REFERENCES:
patent: 3711889 (1973-01-01), Jennings
patent: 3717911 (1973-02-01), Gazda
patent: 4435816 (1984-03-01), Belz et al.
patent: 4691324 (1987-09-01), Kraus
patent: 4813805 (1989-03-01), Dagata
patent: 1272472 (1968-07-01), None
patent: 0260529 (1988-03-01), None
patent: 1702545 (1991-12-01), None
Khloponin Viktor Nikolaevich
Schumacher Ewald
Hoang Tu
Notaro $ Michalos PC
Techom Import-Export GmbH
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