Hermetically sealed arc furnace

Details Hermetically sealed arc furnace Hermetically sealed arc furnace

1975-02-13

1977-05-31

Envall, Jr., R. N.

13 14, H05B 700

Patent

active

040270955

ABSTRACT:
A hermetically sealed arc furnace for producing stainless steel is disclosed which makes use, as a main raw material, a semi-reduced chrome ore pellet and a reduced iron ore pellet and by which these pellets are melted, decarburized and finally refined under a reduced pressure said hermetically sealed arc furnace capable of adjusting its interior reduced pressure, and particularly including a vacuum-tight seal between the furnace lid and furnace body, a telescopically sealed gap between the lid and an electrode extending therethrough and an exhaust opening detachably connected to a vacuum pump for reducing the internal pressure within the furnace.

REFERENCES:
patent: 2243096 (1941-05-01), Hardin
patent: 3194634 (1965-07-01), Yelnik et al.
patent: 3502461 (1970-03-01), Guttler
patent: 3615348 (1971-10-01), Tanczyn
patent: 3635699 (1972-01-01), Chadwick
patent: 3711278 (1973-01-01), Josefsson

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