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:
Dec. 11, 2018
Filed:
Jun. 13, 2014
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Naoshi Yamahira, Fukuyama, JP;
Toshifumi Kodama, Kawasaki, JP;
Yasuyuki Morikawa, Chiba, JP;
Yusuke Tanaka, Tokyo, JP;
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27D 19/00 (2006.01); C21C 5/46 (2006.01); C21B 7/16 (2006.01); C21C 5/48 (2006.01);
U.S. Cl.
CPC ...
C21C 5/4673 (2013.01); C21B 7/163 (2013.01); C21C 5/48 (2013.01); F27D 19/00 (2013.01); F27D 2019/0078 (2013.01);
Abstract
A method of detecting an abnormality in a blast furnace, wherein the abnormality causes clogging of a tuyere unit of the blast furnace, the method including capturing an image of a raceway unit through an in-furnace monitor window disposed at the tuyere unit; and determining that the abnormality has occurred when a brightness of the captured image is lower than or equal to a predetermined brightness threshold and a rate of decrease in the brightness is lower than or equal to a predetermined brightness-decrease-rate threshold.