Method of detecting abnormality at blast furnace and method of operating blast furnace
AssigneeJfe Steel Corporation
InventorsNaoshi Yamahira, Toshifumi Kodama, Yasuyuki Morikawa, Yusuke Tanaka
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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.
Claims12
-5. (canceled)
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 comprising:
- 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.
Dependencies are inferred from the claim text.