Refractory ceramic electrode

Details Refractory ceramic electrode Refractory ceramic electrode

1988-06-01

1990-01-30

Envall, Jr., Roy N.

Industrial electric heating furnaces

Glass furnace device

Joule effect heating

C03B 5027

Patent

active

048978531

ABSTRACT:
An advanceable refractory ceramic electrode is provided for use in the electrical heating of a molten mass in a furnace. The electrode has a tubular ceramic body having a terminal region that in use is immersed in the molten mass and a basal region that in use fits sealingly into the lining. A core is a close fit into the electrode body and projects from one end thereof. At least the outer surface of the core is of a metal that is non-reactive with the material of the refractory ceramic electrode at the temperature of the molten mass and that is itself molten at said temperature so that in use of the electrode the metal in the terminal region melts and establishes an intimate contact between the core and the electrode body. A connector comprises a socket in which core projecting from the electrode body fits to establish a current path to the electrode and a sleeve surrounding the socket and defining an abutment for the electrode body. A jack is provided for operative connection between the connector and support so as to advance the electrode into the furnace. The electrode body is preferably of fired tin oxide and the core may be at least one rod or tube of fired tin oxide coated on its outer surface with metallic silver.

REFERENCES:
patent: 3576385 (1971-04-01), Robinson
patent: 4110545 (1978-08-01), Shaw et al.

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