Title:
高炉操業方法
Document Type and Number:
Japanese Patent JP6743621
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a blast furnace operation method capable of quickly restoring deteriorated gas permeability of burden after the restarting of the blast furnace operation resulting from a repairing work at blowing-stop time, in which a monolithic refractory is sprayed on the inner wall of a blast furnace.SOLUTION: In a repairing work at blowing-stop time in which a monolithic refractory is sprayed on the inner wall of a blast furnace, a steelmaking slag containing CaO at 20 mass% or more is charged into the furnace before and/or after the spraying, to bring the steelmaking slag and lost refractory by rebound into contact with each other. As a result, the lost refractory by rebound melts quickly so that the deteriorated gas permeability of burden can be restored quickly after the restarting of the blast furnace operation.SELECTED DRAWING: None
Inventors:
Toshiaki Kojima
Ken Taniguchi
Minehiro Mizuno
Atsuhiko Sakai
Ken Taniguchi
Minehiro Mizuno
Atsuhiko Sakai
Application Number:
JP2016186795A
Publication Date:
August 19, 2020
Filing Date:
September 26, 2016
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21B7/06; C21B5/00; F27D1/16
Domestic Patent References:
| JP2000273510A | ||||
| JP2001131615A |
Attorney, Agent or Firm:
Fujio Nakamae
Yoshihiro Kurita
Yohei Kiyoi
Yoshihiro Kurita
Yohei Kiyoi