Title:
METHOD FOR OPERATING BLAST FURNACE AND METHOD FOR PRODUCING MOLTEN PIG IRON
Document Type and Number:
WIPO Patent Application WO/2014/088031
Kind Code:
A1
Abstract:
Provided is a method for operating a blast furnace, said method including the following steps: a first step in which a coke charging amount is adjusted while a furnace-top temperature (Ttop) is monitored; a second step in which a pulverized-coal injection amount is adjusted while an intra-furnace superficial gas flow rate (u) and the furnace-top temperature (Ttop) are monitored; a third step in which the oxygen-enrichment ratio of oxygen-enriched air is adjusted while a tuyere combustion temperature (Tf) and the furnace-top temperature (Ttop) are monitored; and a fourth step in which, in accordance with the intra-furnace superficial gas flow rate (u), it is determined whether or not an oxygen-enriched-air injection amount needs to be adjusted.
Inventors:
ICHIKAWA HIROSHI (JP)
OOSAWA YASUYUKI (JP)
HAYASHI TAKAFUMI (JP)
TOMISAKI SHIN (JP)
OOSAWA YASUYUKI (JP)
HAYASHI TAKAFUMI (JP)
TOMISAKI SHIN (JP)
Application Number:
PCT/JP2013/082589
Publication Date:
June 12, 2014
Filing Date:
December 04, 2013
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN ENG CO (JP)
International Classes:
C21B5/00
Domestic Patent References:
| WO2008059739A1 | 2008-05-22 |
Foreign References:
| JP2009102746A | 2009-05-14 | |||
| JP2001073016A | 2001-03-21 | |||
| JPH0913109A | 1997-01-14 | |||
| JP2004027265A | 2004-01-29 | |||
| JP2003247008A | 2003-09-05 | |||
| JP2001131616A | 2001-05-15 | |||
| JP2008111172A | 2008-05-15 | |||
| JP2001234213A | 2001-08-28 | |||
| JPH11286705A | 1999-10-19 | |||
| JP2001234213A | 2001-08-28 |
Other References:
YUTAKA UJISAWA ET AL.: "Effect of HBI Utilization on Blast Furnace Productivity", JOURNAL OF THE IRON & STEEL INSTITUTE OF JAPAN, vol. 92, no. 10, 1 October 2006 (2006-10-01), pages 591 - 600, XP055203263
See also references of EP 2930249A4
See also references of EP 2930249A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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