Patent · US Expired

Electric arc furnace for melting metal, especially steel

US4563766A · kind A · utility

1Cited by

1References

9Claims

0Family size

Assignee

Benteler-Werke AG · DE

Inventors

Klaus Bick · Paderborn, DE
Lothar Harmsen · Halver, DE
Wilhelm Lachenmayer · Detmold, DE
Jurgen Zieschang · Halver, DE

Key dates

Filing date	Oct 9, 1979
Grant date	Jan 7, 1986
Priority date	—
Expiry date	Oct 9, 1999

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF27B3/24
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

An electric arc furnace for melting metal, especially steel, includes a container having an upper open ended substantially cylindrical wall portion and a lower cylindrical wall portion extending downwardly therefrom and being closed at the bottom and receiving during operation of the furnace a bath of molten material having an upper level at a predetermined maximum elevation above the bottom of the container. The container includes an outer metal shell and refractory material covering at least the lower wall portion of the shell and the closed bottom. In order to increase the charging volume of the container without essentially changing the height thereof, the upper wall portion has, at a distance of at least 300 mm above the level the bath of molten metal, an inner diameter which is greater than the outer diameter of the metal shell of the lower wall portion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.