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. 04, 1976
Filed:
Feb. 15, 1974
Applicant:
Inventors:
Werner Wenzel, Aachen, DT;
Peter Speich, Cologne, DT;
Friedrich H Franke, Aachen, DT;
Burkhardt Dreyer, Aachen, DT;
Assignees:
Rheinische Braunkohlenwerke AG, Cologne, DT;
Other;
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
75 42 ; 75 35 ;
Abstract
A process for the direct reduction of iron ores using a reducing gas mixture which is passed through a shaft furnace containing the ore to be reduced is disclosed. The process is characterized in that the partial flow of reducing gas mixture is removed from the furnace approximately at the point of transition between the magnetite and Wustite stages of the ore and is regenerated. The regenerated reducing gas is then reapplied to the furnace with a fresh reducing gas mixture resulting in a substantial energy saving.