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:
Oct. 18, 1977
Filed:
Sep. 22, 1975
Applicant:
Inventors:
Donald W Clark, North Litchfield Beach, SC (US);
Allan C Huestis, Georgetown, SC (US);
Assignee:
Midrex Corporation, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
75 35 ; 75 34 ;
Abstract
This invention relates to a method for controlling the carbon content of metallized iron pellets produced by the continuous direct reduction of iron oxide in a vertical shaft furnace with a reducing gas having a high hydrogen and carbon monoxide content. According to the method, in addition to the standard reducing gases introduced to the reducing zone, methane or methane-containing gas is introduced to the shaft furnace at specified locations beneath the reducing zone and, by controlling the conditions in the furnace, a proportion of the injected gas is reformed in the furnace to reducing gases.