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:
Sep. 25, 2001
Filed:
Oct. 06, 1999
Herbert Gruenbacher, Marien, AT;
Guenter Schrey, Linz, AT;
Abstract
In a method of producing molten pig iron (,) or molten steel pre-products from charging substances formed of iron ore (,), preferably in the shape of lumps and/or pellets, and optionally of fluxes (,), the charging substances are directly reduced to sponge iron in a reduction zone (,), the sponge iron is charged into a melt-down gasifying zone (,) and, there, is melted under the supply of carbon carriers (,) and an oxygen-containing gas, wherein a CO—H,-containing reducing gas is generated that is withdrawn from the melt-down gasifying zone (,) and introduced into the reduction zone (,), is reacted there and is withdrawn as a topgas, wherein the topgas is subjected to scrubbing and the sludges thus separated are at least partially agglomerated. To utilize the agglomerates thus formed while expending as little energy as possible, the agglomerates are recirculated into the reduction zone (,).