The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1977
Filed:
Jun. 29, 1976
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ; H05B / ;
U.S. Cl.
CPC ...
75 1 / ; 13 / ; 75 12 ;
Abstract
In order to melt iron-containing material, particularly sponge iron, in an electric furnace containing a molten metal mass underlying a molten slag mass, electrodes are immersed in the molten slag mass, a current is caused to flow between the electrodes and is converted into melting heat by the electrical resistance of the slag, and the number of charge carriers in the slag is adjusted to control the conductivity of the slag and thus the ratio of the current flowing through the slag to the current flowing through the molten metal.