Prewarning device for induction melting furnace

Details Prewarning device for induction melting furnace Prewarning device for induction melting furnace

1992-06-16

1994-06-07

Reynolds, Bruce A.

Industrial electric heating furnaces

Induction furnace device

Having condition signaling means

373155, H05B 606

Patent

active

053196716

ABSTRACT:
A prewarning device for an induction melting furnace serves for warning of breakouts of molten metal on ceramic furnace linings of melting furnaces. The device has electrodes that may be arranged on the furnace lining in question which are divided into two groups of different polarity and are spaced apart from each other. The electrode groups can be connected to an evaluation unit in order to determine the electrical temperature-dependent resistance of the furnace lining. In order to permit a simple application of the electrodes on the outside of the furnace lining and assure a high reliability of indication of the entire system, at least a high reliability of indication of the entire system, at least one of the electrodes is arranged as an electrode network on a first side on a ceramic foil. Either the first side of the ceramic foil or the opposite side is arranged on the furnace lining. The foil in the former case has a lower thermal conductivity and a lower electrical conductivity than the ceramic material of the furnace lining and in the latter case an approximately identical or higher thermal conductivity and an approximately identical or higher electrical conductivity.

REFERENCES:
patent: 1922029 (1983-08-01), Chesnut
patent: 4201882 (1980-05-01), Kolotilo et al.
patent: 4989218 (1991-01-01), Tateno

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