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:
Mar. 14, 1978
Filed:
Mar. 31, 1976
Per Harald Collin, Falun, SW;
ASEA Aktiebolag, Vesteras, SW;
Abstract
For the melt reduction of iron oxides, arcs are formed between at least three arcing electrodes in an iron melt, the electrodes being symmetrically positioned about a common vertical axis. The arcs are powered by direct current with the electrodes being cathodic and the melt anodic, and the electrodes are interspaced so closely together that the arcs, due to the direct current powering, converge and form a common focal spot at the electrodes' axis, on the melt, the spot remaining stationary and with any slag on the melt blown away so that the spot is formed by bare metal. Iron oxide material and carbonaceous material, in fine form, is fed downwardly to this spot with the reaction between the oxides and carbon occurring practically immediately.