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:
Feb. 22, 1983
Filed:
Jan. 14, 1981
Applicant:
Inventors:
Per H Collin, Stocksund, SE;
Erik A Bengtsson, Borlange, SE;
Assignee:
Stora Kopparbergs Bergslags AB, Falun, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
75 26 ; 75 34 ; 266172 ; 422146 ;
Abstract
A method is suggested for the reduction of finely-divided iron oxide in a fluidized bed, with the air of reducing gases formed by partial combustion in the bed of finely-divided carbonaceous material by gas containing molecular oxygen, which is supplied through nozzles (4). The exterior surface of the nozzles is cooled to a temperature lower than 200.degree. C below the melting point of the reduced metal. In this way the particles of the reduced iron are prevented from adhering to the nozzles.