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:
May. 07, 1996
Filed:
Apr. 10, 1995
Herbert Grunbacher, St. Marien, AT;
Leopold-Werner Kepplinger, Leonding, AT;
Franz Reufer, Dusseldorf, DE;
Gunter Schrey, Linz, AT;
Abstract
In a process for producing an iron melt, iron ore is reduced to sponge iron in a direct reduction zone. The sponge iron is melted in a meltdown gasifying zone while supplying carbon-containing material under gasification of the carbon-containing material to reducing gas and under formation of a slag. The reducing gas is injected into the direct reduction zone, is reacted there and is drawn off as a top gas. The reducing gas and/or the top gas is subjected to gas scrubbing and the sludges separated during scrubbing are admixed with binder and coal dust and subsequently are agglomerated. In order to be able to supply back to the direct reduction process in large amounts sludges incurring in the direct reduction of iron ore without disturbing the process course of the direct reduction in any way, the sludges separated during scrubbing are dehydrated to a residual moisture content prior to being further treated, coal dust and, as a binder, quick lime are then admixed to the sludges, the sludges subsequently are granulated and the granulate thus formed is supplied to the meltdown gasifying zone while increasing the basicity of the slag to a maximum of 1.25.