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:
Mar. 15, 1983
Filed:
Apr. 30, 1981
Applicant:
Inventors:
Assignee:
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
75 35 ; 266156 ;
Abstract
In a direct reduction plant employing a shaft furnace for reducing iron ore and a steam reformer for producing a reducing gas from gaseous hydrocarbon compounds and provided with an installation for heating at least a part of the reducing gas to be supplied to said shaft furnace, either hydrogen sulfide or a material adapted to produce hydrogen sulfide within the reducing gas is added to the reducing gas system from outside of the system so that the concentration of hydrogen sulfide in the reducing gas at the inlet of said shaft furnace is 10 to 100 volume ppm.