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:
Dec. 03, 2002
Filed:
Oct. 30, 2000
Guido Monteyne, Lembeke, BE;
Sidmar N.V., Gent, BE;
Abstract
A method for the reduction of metallic oxides and a rotating-hearth furnace. The method is for the reduction of metallic oxides in a furnace with a ring-shaped rotating hearth in which a carbonaceous reducing agent and metallic oxides are deposited in a strip on a part of the rotating hearth and are then transported in a roughly helical movement to a discharge device. The reducing agent is preheated and mixed with the preheated metallic oxides before and/or during their deposition on the rotating hearth. In a first reducing stage, the volatile components of the carbonaceous reducing agent (mainly methane and hydrogen) are used to initiate the reduction of the metallic oxides and, in a second reducing stage, carbon monoxide is used. The rotating-hearth furnace is subdivided into a charging zone, at least one intermediate zone adjacent to the charging zone, and a discharge zone adjacent to the intermediate zone.