Bottom electrode arrangement for an electric furnace

Details Bottom electrode arrangement for an electric furnace Bottom electrode arrangement for an electric furnace

1985-01-24

1986-09-30

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

H05B 702

Patent

active

046150358

ABSTRACT:
The shape of the furnace hearth (20) in the area of the bottom electrode (6) is defined within limits given by exponential functions, with minimum and maximum values being given for the ratio of the cross section (A.sub.L) of the melting bath (13) to the cross section (A) of the bottom electrode (6) in its melting bath contact surface (6', 7'). The electrode is designed in the shape of a truncated cone, with the cone surface enclosing an angle of at least 20.degree. with the melting bath contact surface. The trumpet-shaped or conical widening of the furnace hearth surface (20) in the area of the bottom electrode makes possible a continuous transition of the current and of the electromagnetic field in this area, by which means the bath movement near to the melting bath contact surface (6', 7') of the bottom electrode (6) is also reduced. The arrangement of the bottom electrode (4) in a protuberance of the furnace hearth (20) protects the bottom electrode (6) from the flow spreading throughout the entire melting bath (13). Moreover, only one metal sump is required in the protuberance in order to initiate a subsequent melting process, and not, as in normal practice, a metal sump which extends over the entire furnace hearth surface (20).

REFERENCES:
patent: 1167176 (1916-01-01), Highfield
patent: 4125737 (1978-11-01), Andersson

Affiliated with

Also associated with

Rating

Bottom electrode arrangement for an electric furnace does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bottom electrode arrangement for an electric furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bottom electrode arrangement for an electric furnace will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-988299