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:
Jan. 30, 2007
Filed:
Feb. 20, 2002
Emile Lonardi, Bascharage, LU;
Jean-luc Roth, Thionville, FR;
Paul Berg, Eischen, LU;
Fred Weisgerber, Oberkorn, LU;
Fred Parasch, Dudelange, LU;
Emile Lonardi, Bascharage, LU;
Jean-Luc Roth, Thionville, FR;
Paul Berg, Eischen, LU;
Fred Weisgerber, Oberkorn, LU;
Fred Parasch, Dudelange, LU;
Paul Wurth S.A., Luxembourg, LU;
Abstract
A process for producing liquid smelting iron in an electric arc furnace includes several electrodes, equipped with a hearth, and containing a heel covered with a non-foaming liquid slag. The process further includes the reduction of the metallic fines, in order to form pre-reduced metallic fines containing an excess of free carbon; the hot transfer of the pre-reduced metallic fines within a curtain of inert gas into the heel contained in the electric arc furnace; the agitation of the heel by the injection of gas in such a manner that the formation of crusts is avoided; and the smelting of the pre-reduced metallic fines in the electric arc furnace in order to obtain the liquid smelting iron.