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:
Jun. 26, 2001
Filed:
Oct. 26, 1998
Ernst Eichberger, Pichl/Wels, AT;
Günter Schrey, Linz, AT;
Franz Reufer, Düsseldorf, DE;
Jörg Diehl, Linz, AT;
Gerald Rosenfellner, St.Peter/Au, AT;
Deutsche Voest-Alpine Industrieanlagenbau GmbH, Dusseldorf, DE;
Abstract
In a method for producing liquid pig iron or liquid steel pre-products from charging substances comprising iron ore, preferably in lumps or pellets, and optionally fluxes. The charging substances are directly reduced to sponge iron in a reduction zone (,) and the sponge iron is melted in a melt-down gasifying zone (,) under the supply of carbon carriers and oxygen-containing gas. CO-and H,-containing gas is introduced into the reduction zone (,) and is reacted there. An export gas is withdrawn and conducted to a consumer (,). The export gas is subjected to CO,removal or partial combustion and the resulting gas with CO,is introduced back into the reduction process. This is done to keep down the carbon carriers having high portion of C,as well as consumption of O,. A highly CO,-containing gas having a CO,content far in excess of the CO,content of the export gas, preferably exceeding 40%, and having a CO content that is far below the CO content of the export gas is introduced into the melt-down gasifying zone (,).