DC arc furnace and starting electrode construction

Details DC arc furnace and starting electrode construction DC arc furnace and starting electrode construction

1975-12-11

1977-05-17

Envall, Jr., R. N.

13 9R, H05B 700

Patent

active

040243370

ABSTRACT:
A DC arc furnace has a hearth through which electric power is transmitted to a melt, and at least one starting electrode which can be inserted into the furnace from its outside, for pressing against a pile of scrap on the furnace's hearth so that with the furnace's arcing electrode, a circuit can be formed effecting a melt-down of the scrap. The hearth is of the type permitting electric power to be transmitted through it to the resulting melt once the melt is formed, and the starting electrode being thereafter inactivated. This starting electrode is characterized by being made of metal and having a tip of carbonaceous material, such as graphite, providing the starting electrode with the rugged characteristics required for its insertion into and removal from the furnace for start-up of the furnace, while at the same time providing a tip that is particularly resistant to the heat and possible incidental arcing occurring during the use of the starting electrode.

REFERENCES:
patent: 3054166 (1962-09-01), Spendelow, Jr. et al.
patent: 3835230 (1974-09-01), Valchev et al.

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