Industrial electric heating furnaces – Arc furnace device – Furnace body detail
Patent
1985-03-14
1989-05-09
Envall, Jr., Roy N.
Industrial electric heating furnaces
Arc furnace device
Furnace body detail
F27D 100
Patent
active
048295388
ABSTRACT:
A hearth for use in a furnace, which comprises an upper layer of magnesia containing chromic oxide, a lower layer containing graphite and an organic bonding agent, and an intermediate layer of a mixture of the materials forming the upper and lower layers. The hearth is particularly useful in DC arc funaces, in which steel rods embedded in the bottom act as the anode. The hearth has improved service durability.
REFERENCES:
patent: 941419 (1909-11-01), Keller
patent: 4228314 (1980-10-01), Stenkvist
Bohm Kurt
Gelsdorf Gunter
Hlawatschek Hartmut
Schubert Manfred
Didier-Werke AG
Envall Jr. Roy N.
M.A.N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
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