Industrial electric heating furnaces – Arc furnace device – Furnace body detail
Patent
1984-04-17
1985-09-10
Pellinen, A. D.
Industrial electric heating furnaces
Arc furnace device
Furnace body detail
373108, H05B 700
Patent
active
045410992
ABSTRACT:
A DC arc furnace has an electrically conductive hearth adapted to contain a melt, and at least one arcing electrode above the hearth and adapted to form a heating arc with the melt when the hearth and electrode are supplied with DC power. The hearth has a wear lining directly contacted by the melt through which electrical conductors extend from the bottom of the wear lining to its top. Layers of electrically conductive bricks are under the wear lining and have a top layer electrically connecting with the electrical conductors, and a melt plate under the layers of the electrically conductive bricks is connected to DC power. The layers of conductive bricks have a bottom layer in electrical connection with the melt plate. The improvement comprises a layer of mixed bricks between the top and bottom layers of the electrically conductive bricks and formed by alternating electrically conductive and non-conductive bricks.
REFERENCES:
patent: 1287849 (1918-12-01), Booth
patent: 1674982 (1928-06-01), Moore
patent: 4228314 (1980-10-01), Stenkvist
patent: 4277638 (1981-07-01), Stenkvist
patent: 4324943 (1982-04-01), Stenkvist et al.
patent: 4428731 (1985-01-01), Maes et al.
patent: 4468782 (1984-08-01), Stenkvist
Rappinger Bo
Stenkvist Sven-Einar
ASEA Aktiebolag
Pellinen A. D.
Thompson Gregory D.
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