Title:
BLAST FURNACE SLAG LEVEL ESTIMATION METHOD, OPERATION GUIDANCE METHOD, HOT METAL PRODUCTION METHOD, BLAST FURNACE SLAG LEVEL ESTIMATION DEVICE, AND OPERATION GUIDANCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/008170
Kind Code:
A1
Abstract:
Provided are a blast furnace slag level estimation method and a blast furnace slag level estimation device that enable highly accurate estimation of the liquid level of slag. Further provided are an operation guidance method, a hot metal production method, and an operation guidance device, for carrying out guidance for a blast furnace operation on the basis of the liquid level of slag that is estimated highly accurately. The blast furnace slag level estimation method includes a step (S2) of calculating the liquid level of a melt containing slag for each of a plurality of domains that are delimited by a low permeable phase, by using a physical model based on a mass balance which takes, as an input, at least one of a pig iron tapping speed, a slag discharge speed, a pig iron production speed and a tailing speed, and which assumes the existence, at the bottom of a furnace, of a low permeable phase which does not readily transmit slag.
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Inventors:
HASHIMOTO YOSHINARI (JP)
MASUDA RYOSUKE (JP)
MASUDA RYOSUKE (JP)
Application Number:
PCT/JP2022/027308
Publication Date:
February 02, 2023
Filing Date:
July 11, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00; C21B7/24; F27D19/00; F27D21/00
Foreign References:
| JP2003155507A | 2003-05-30 | |||
| JP2015206107A | 2015-11-19 | |||
| JP2002294315A | 2002-10-09 | |||
| JPH09227911A | 1997-09-02 |
Other References:
MASAKAZU IIDA, KAZUHIRO OGURA, TETSUI HAKONE: "Numerical Study on Metal/Slag Drainage Rate Deviation during Blast Furnace Tapping", TETSU TO HAGANE: JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, IRON AND STEEL INSTITUTE OF JAPAN. TOKYO., JP, vol. 96, no. 6, 1 June 2010 (2010-06-01), JP , pages 353 - 362, XP009543031, ISSN: 0021-1575, DOI: 10.2355/tetsutohagane.96.353
SAWA YOSHITAKA ET AL., INFLUENCE OF LOW PERMEABILITY ZONE IN BLAST FURNACE HEARTH ON TEMPERATURE DISTRIBUTION IN FURNACE BOTTOM AND ON IRON AND SLAG TAPPING INDICES, vol. 78, pages 1171
SAWA YOSHITAKA ET AL., INFLUENCE OF LOW PERMEABILITY ZONE IN BLAST FURNACE HEARTH ON TEMPERATURE DISTRIBUTION IN FURNACE BOTTOM AND ON IRON AND SLAG TAPPING INDICES, vol. 78, pages 1171
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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