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:
Aug. 09, 2016
Filed:
Jul. 11, 2012
Applicants:
Akinori Murao, Fukuyama, JP;
Daiki Fujiwara, Fukuyama, JP;
Shiro Watakabe, Fukuyama, JP;
Inventors:
Assignee:
JFE Steel Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B 7/00 (2006.01); C21B 5/00 (2006.01); C21B 7/16 (2006.01);
U.S. Cl.
CPC ...
C21B 5/00 (2013.01); C21B 5/003 (2013.01); C21B 7/00 (2013.01); C21B 7/163 (2013.01);
Abstract
A method of operating a blast furnace comprising two or more lances that inject reducing agents from a tuyere including injecting a solid reducing agent and a flammable reducing agent from different lances; and arranging a position of an end of the lance that injects the flammable reducing agent closer to a near side in a injecting direction by more than 0 to 50 mm than a position of an end of the lance that injects the solid reducing agent.