Industrial electric heating furnaces – Arc furnace device – Electrode support
Patent
1986-08-04
1987-10-27
Envall, Jr., Roy N.
Industrial electric heating furnaces
Arc furnace device
Electrode support
H05B 712
Patent
active
047034939
ABSTRACT:
A sealing device which comprises a refractory portion consisting of high-alumina material with an Al.sub.2 O.sub.3 content higher than 80%. The internal portion of the sealing device is made up of refractory cement with an Al.sub.2 O.sub.3 content higher than 80% which is cast and vibrated in a mould formed by a cylinder-shaped metallic part of the device and an internal fixed template. After the setting of the refractory cement, the internal templet is drawn out and the device, comprising a metallic and a refractory portion, is subjected to drying. This is effected at 150.degree. C.
REFERENCES:
patent: 4517678 (1985-05-01), Ball et al.
patent: 4587658 (1986-05-01), Ball et al.
Bakalov Nikolay G.
Ivanov Ivan K.
Penev Penyo I.
Savov Peter H.
Velev Velyo T.
Dubno Herbert
Envall Jr. Roy N.
NPP PO Elektrotermia
Ross Karl F.
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