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. 05, 2013
Filed:
Jul. 01, 2004
Heinz Eichberger, Bad Soden, DE;
Karl-josef Schneider, Schermbeck, DE;
Heinz Eichberger, Bad Soden, DE;
Karl-Josef Schneider, Schermbeck, DE;
Outotec Oyj, Espoo, FI;
SMS Siemag AG, Duesseldorf, DE;
Abstract
In a method of charging fine-grained metals, in particular directly reduced iron (DRI), into an electric-arc furnace (), the metal is supplied via a downpipe () to an opening () provided in the furnace roof (), is introduced into the furnace () through this opening () as bulk material stream (), and falls onto the melt () merely by gravity. Further, an electric-arc furnace () suited for this purpose is described. A rather loss-free introduction even of fine-grained material having a mean grain size of less than 1 mm is achieved by passing the bulk material stream () through a dosing orifice () after the downpipe () and before entering the furnace (). The bulk material stream () then enters the furnace essentially undisturbed.