Industrial electric heating furnaces – Arc furnace device – Furnace body detail
Patent
1981-06-30
1983-11-22
Envall, Jr., Roy N.
Industrial electric heating furnaces
Arc furnace device
Furnace body detail
F27D 112
Patent
active
044173431
ABSTRACT:
A water-cooled lid made of steel tubing and removably mountable on the top of the body of an electric furnace comprises a small central top portion having electrode inserting bores, a circular ring along its outer periphery and a plurality of sectorial segments arranged radially between the top portion and the circular ring. Each of the sectorial segments has a zigzag cooling water channel formed by steel tubing, extending along circumferences concentric with the lid and having a cooling water inlet and cooling water outlet. The zigzag channel is formed by bending a single steel tube into zigzag portions folded together in intimate contact with one another. Alternatively the channel is formed by a plurality of steel tubes arranged side by side in intimate contact with one another along circumferences concentric with the lid and steel frames having communicating chambers in communication with the open ends of adjoining tubes.
REFERENCES:
patent: 4216348 (1980-08-01), Greenberger
patent: 4273949 (1981-06-01), Fischer et al.
patent: 4351055 (1982-09-01), Bick et al.
Envall Jr. Roy N.
Nikko Co. Ltd.
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