Title:
METHOD FOR DETECTING REMAINING AMOUNT OF LIQUID AND DETECTION DEVICE FOR SAME, METHOD FOR DETECTING REMAINING AMOUNT OF MOLTEN SUBSTANCE AND DETECTION DEVICE FOR SAME, AND VERTICAL FURNACE OPERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/168556
Kind Code:
A1
Abstract:
Provided are: a method for detecting a remaining amount of a molten substance and a detection device for the same, whereby the remaining amount of a molten substance in a vertical furnace can be detected at an optional timing; and a method for operating a vertical furnace using the detection method. The present invention provides a method for detecting the remaining amount of the molten substance remaining at the bottom of the furnace after discharge of the molten substance has been completed, in a vertical furnace in which an oxygen-containing gas is blown from a furnace lower part of the vertical furnace, carbon is combusted to generate a high-temperature reducing gas, an iron source raw material that is inserted from the top of the vertical furnace to form a solid filling structure in the vertical furnace is melted and reduced by the high-temperature reducing gas to produce a molten substance, and the molten substance is discharged from a tapping hole of the vertical furnace. The remaining amount of the molten substance is detected by using a difference between a production speed of the molten substance from the tapping hole, and a discharge speed of the molten substance calculated using the discharge acceleration of the molten substance, the discharge time, and the initial discharge speed.
Inventors:
KAWASHIRI YUKI (JP)
YAMAMOTO TETSUYA (JP)
NOUCHI TAIHEI (JP)
ICHIKAWA KAZUHIRA (JP)
YAMAMOTO TETSUYA (JP)
NOUCHI TAIHEI (JP)
ICHIKAWA KAZUHIRA (JP)
Application Number:
PCT/JP2022/000871
Publication Date:
August 11, 2022
Filing Date:
January 13, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00; C21B7/24; F27D21/00
Foreign References:
| JP2017160498A | 2017-09-14 | |||
| JPS59127609A | 1984-07-23 | |||
| JPH05156331A | 1993-06-22 | |||
| JPH08277404A | 1996-10-22 | |||
| JP2006176805A | 2006-07-06 | |||
| JP2017160498A | 2017-09-14 |
Other References:
"Ironmaking", 2006, THE IRON AND STEEL INSTITUTE OF JAPAN, article "Physical and chemical data book for iron-and steelmaking", pages: 437
TAKASHI SUGIYAMA: "Analysis on Liquid Flow in the Dripping Zone of Blast Furnace", TETSU-TO-HAGANE, vol. 73, no. 15, 1987, pages 2044 - 2051
YUSUKE KASHIHARA: "Effect of Unconsumed Mixed Small Coke on Permeability in Lower Part of Blast Furnace", TETSU-TO-HAGANE, vol. 102, no. 12, 2016, pages 661 - 668
TAIHEI NOUCHI: "Effects of Operation Condition and Casting Strategy on Drainage Efficiency of the Blast Furnace Hearth", TETSU-TO-HAGANE, vol. 92, no. 12, 2006, pages 269 - 274
See also references of EP 4269625A1
TAKASHI SUGIYAMA: "Analysis on Liquid Flow in the Dripping Zone of Blast Furnace", TETSU-TO-HAGANE, vol. 73, no. 15, 1987, pages 2044 - 2051
YUSUKE KASHIHARA: "Effect of Unconsumed Mixed Small Coke on Permeability in Lower Part of Blast Furnace", TETSU-TO-HAGANE, vol. 102, no. 12, 2016, pages 661 - 668
TAIHEI NOUCHI: "Effects of Operation Condition and Casting Strategy on Drainage Efficiency of the Blast Furnace Hearth", TETSU-TO-HAGANE, vol. 92, no. 12, 2006, pages 269 - 274
See also references of EP 4269625A1
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
Download PDF: