1978-05-05
1980-05-06
Envall, Jr., Roy N.
13 35, H05B 500
Patent
active
042018820
ABSTRACT:
An induction furnace intended for melting a metal which is disposed in a crucible in an alternating magnetic field developed by an inductor enveloping this crucible. Induced in the metal is a current which heats the latter. Fixedly mounted intermediate the crucible and the inductor on the outer surface of the latter is a heat-resistant current-conducting screen made from a carbon material of not more than 1.5 mm thick. The screen envelops the entire inner surface of the inductor and is electrically connected to a signal system intended to indicate the degree of wear of the crucible wall. The signal system is set to a predetermined voltage at which the furnace is shut down to avoid an emergency situation.
As the crucible walls wear out in the course of operation, the crucible resistance is therefore reduced, whereas the electrical potential in the crucible between the screen and metal is increased.
When a preset voltage is attained, the signal system is actuated to discontinue the furnace operation. As the metal which penetrates through the furnace wall to the screen solidifies, its passage towards the inductor is terminated.
The screen construction of the invention makes it possible to substantially enhance the furnace efficiency and to eliminate emergency situations.
REFERENCES:
patent: 3185894 (1965-05-01), Beckius
patent: 3412195 (1968-11-01), Mumper
Apatova Larisa D.
Cherevaty Anatoly A.
Fursov Viktor V.
Goncharov Leonid M.
Kolotilo Daniil M.
LandOfFree
Induction melting 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 Induction melting furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Induction melting furnace will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1006054