Electric heating – Metal heating – By arc
Patent
1987-10-23
1990-04-17
Paschall, M. H.
Electric heating
Metal heating
By arc
21912136, 21912158, 373 18, 373 22, 75 1019, B23K 900
Patent
active
049182820
ABSTRACT:
A method and apparatus for heating molten steel in a steel making operation is disclosed, and which includes a refractory lined vessel having an open top, a removable cover adapted to overlie the top, and at least one plasma arc torch mounted so as to extend through the cover at an angle of about 60.degree.. The arc gas for the torch includes a substantial percentage of nitrogen, which permits a higher power level as compared to conventionally used argon, and the mass flow rate of the arc gas is maintained at a sufficiently high level to produce a continuous blast of gas which impinges at an angle upon any slag formed on the surface of the molten steel with sufficient force to move the slag and expose the underlying molten steel. As a result, the attachment of the arc to the underlying molten steel is facilitated, and the impingement of the gas contributes to the mixing of the steel to avoid heat stratification.
REFERENCES:
patent: 2828516 (1958-04-01), Black et al.
patent: 3015554 (1962-01-01), Rummel
patent: 3479022 (1969-11-01), Coupette
patent: 3496280 (1970-02-01), Dukelow et al.
patent: 3546347 (1970-12-01), Hausig et al.
patent: 3749802 (1973-07-01), Camacho
patent: 3749803 (1973-07-01), Camacho
patent: 3779182 (1973-12-01), Camacho
patent: 3819840 (1974-06-01), Schultz
patent: 3828107 (1974-08-01), Sone
patent: 3843352 (1974-10-01), Ulrich
patent: 4048436 (1977-09-01), Hiratake et al.
patent: 4082914 (1978-04-01), Bortnichuk et al.
patent: 4152532 (1979-05-01), Eguchi et al.
patent: 4195216 (1980-03-01), Beauchamp et al.
patent: 4436290 (1984-03-01), Kilches et al.
patent: 4521890 (1985-06-01), Burnham et al.
patent: 4559439 (1985-12-01), Camacho et al.
patent: 4625092 (1986-11-01), Camacho et al.
patent: 4632700 (1986-12-01), Bebber et al.
A 58-221220 Patent Abstracts of Japan, vol. 8, No. 67.
A 59-110741 Patent Abstracts of Japan, vol. 8, No. 225.
Paschall M. H.
Plasma Energy Corporation
LandOfFree
Method and apparatus for heating molten steel utilizing a plasma does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for heating molten steel utilizing a plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for heating molten steel utilizing a plasma will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1054435