Direct-current metallurgical arc furnace and method of melting w

Details Direct-current metallurgical arc furnace and method of melting w Direct-current metallurgical arc furnace and method of melting w

1984-05-03

1986-05-06

Pellinen, A. D.

Industrial electric heating furnaces

Arc furnace device

Power supply system

373102, H05B 720

Patent

active

045876606

ABSTRACT:
A direct-current arc furnace has a vessel with a floor and a cover, at least two vault electrodes projecting down into the vessel through the cover, and a hearth electrode exposed in the vessel generally in the floor below the vault electrodes. A scrap-metal charge is melted in this furnace by first energizing the vault electrodes with direct-current voltage of opposite polarity while displacing them downward through the charge from an upper position spaced relatively far from the hearth electrode to a lower position spaced relatively close to the hearth electrode and thereby passing an electric current through the charge to melt the charge and form a puddle of molten metal on the floor of the vessel at the hearth electrode. Then the hearth electrode is energized with direct-current voltage of a polarity opposite that of one of the vault electrodes and an electric current is passed through the charge between the one vault electrode and the hearth electrode to melt the charge and form a puddle at the hearth electrode at the floor of the vessel. Thereafter the vault electrodes are raised while continuing to pass an electric current partly formed as an arc between at least the one vault electrode and the hearth electrode until the entire charge is melted.

REFERENCES:
patent: 1564139 (1925-12-01), Saklatwalla
patent: 3999000 (1976-12-01), Stenkvist
patent: 4254298 (1981-03-01), Svedsen

Affiliated with

Also associated with

Rating

Direct-current metallurgical arc furnace and method of melting w does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct-current metallurgical arc furnace and method of melting w, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct-current metallurgical arc furnace and method of melting w will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1578835