Contact electrode for melting and heating furnaces with DC plasm

Details Contact electrode for melting and heating furnaces with DC plasm Contact electrode for melting and heating furnaces with DC plasm

1981-02-05

1983-06-28

Paschall, M. H.

Electric heating

Metal heating

By arc

219121P, 219121PA, 373 18, 31511121, H05H 100, B23K 100

Patent

active

043907733

ABSTRACT:
The invention relates to a metallurgical plasma melting furnace used for the melting of metals and alloys wherein at least one auxiliary start-up burner for liquid or gaseous fuels is so arranged adjacent to each plasma burner that the hot combustion gases enter into the plasma melting furnace through the same opening in the sidewall of the furnace vessel and melt a crater into the charge material in front of the plasma burner. After the crater has reached a sufficient size, the plasma burners can be reliably operated industrially.

REFERENCES:
patent: 3197539 (1965-07-01), Hinds
patent: 3894573 (1975-07-01), Paton et al.
patent: 3899628 (1975-08-01), Hirt
patent: 4129742 (1978-12-01), Ward
patent: 4263468 (1981-04-01), Primke et al.

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