Title:
炉底の昇温方法および高炉の立ち上げ方法
Document Type and Number:
Japanese Patent JP7243677
Kind Code:
B2
Abstract:
To provide a heating method of a furnace bottom suitable for quickly restarting a blast furnace whose operation has been shut down by using a burner installed at a tap hole of the blast furnace, and a method for restarting the blast furnace using the method.SOLUTION: In a heating method of a furnace bottom, the temperature of the furnace bottom is raised by blowing heating gas into the furnace from a burner installed at a tap hole of the furnace bottom of the blast furnace whose operation has been shut down. The heating method of a furnace bottom includes: a step of estimating the shape of a solidified layer grown in the furnace bottom during the shutdown; a step of estimating a mean thickness of the solidified layer between a tap hole and a tuyere immediately above the tap hole for a plurality of tap holes; and a step of heating the furnace bottom by installing a burner in a tap hole having the smallest estimated mean thickness or the second smallest estimated mean thickness in the case where there are three or more tap holes, and blowing heating gas from the burner into the furnace.SELECTED DRAWING: Figure 1
Inventors:
Terui Mitsuteru
Aki Murao
Toshiyuki Hirosawa
Kota Moriya
Aki Murao
Toshiyuki Hirosawa
Kota Moriya
Application Number:
JP2020085666A
Publication Date:
March 22, 2023
Filing Date:
May 15, 2020
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21B5/00; F27D13/00
Domestic Patent References:
| JP2016030833A | ||||
| JP2013221184A | ||||
| JP2005098676A |
Attorney, Agent or Firm:
Patent Attorney Ginza Maronnier Patent Office