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:
Apr. 10, 2001
Filed:
Dec. 04, 1998
Gerald Rosenfellner, St. Peter/Au, AT;
Joerg Diehl, Linz, AT;
Abstract
The invention relates to a process for the reduction of metal-oxide-bearing material, particularly of iron ore, in a reduction vessel (,), wherein the metal-oxide-bearing material is charged from a vessel (,) for the metal-oxide-bearing material into the reduction vessel (,) and reduced therein by means of a reduction gas flowing counter currently to the metal-oxide-bearing material and wherein waste reduction gas discharged from the reduction vessel (,) is used for preheating the metal-oxide-bearing material in the vessel (,) for metal-oxide-bearing material, which is characterized in that the waste reduction gas discharged from the reduction vessel (,) is combusted and that a gas seal (,) is operated with the combusted waste reduction gas, which is located between the reduction vessel (,) and the vessel (,) for metal-oxide-bearing material, whereby the reduction vessel (,) is sealed against the vessel (,) for metal-oxide-bearing material (FIG.,).