PROCESS CONTROL METHOD, BLAST FURNACE OPERATION METHOD, MOLTEN PIG IRON PRODUCTION METHOD, AND PROCESS CONTROL APPARATUS

WIPO Patent Application WO/2024/048214

A1

Provided is a process control method, a blast furnace operation method, a molten pig iron production method, and a process control apparatus, which are for achieving suppression of variability in molten pig iron temperature while reducing a reduction material ratio in a blast furnace. This process control method comprises: a response prediction step for determining a predictive value of a future molten pig iron temperature by using a physical model with which it is possible to calculate the internal state of a blast furnace; and a manipulation degree determination step for determining the deviation between a target value and the predictive value of the molten pig iron temperature determined in the response prediction step, and determining the degrees by which a fine powdered coal ratio and a blown air moisture are to be manipulated, so as to minimize or maximize an evaluation function having a term corresponding to the deviation and a term for reducing a reduction material ratio or the blown air moisture.

JPS5669311	METHOD OF OPERATING REDUCING BLOWING-OUT FOR BLAST FURNACE
JPS58500412	[Title of the Invention] An injecting method to a blast furnace of overheated reducing gas
JPH06172827	METHOD FOR BLOWING PULVERIZED COAL INTO BLAST FURNACE

HASHIMOTO YOSHINARI (JP)
MASUDA RYOSUKE (JP)
YAMATO GENYA (JP)
KIZU TAKERU (JP)

PCT/JP2023/028830

March 07, 2024

August 07, 2023

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JFE STEEL CORP (JP)

C21B5/00

WO2015105107A1

2015-07-16

JP2000129319A	2000-05-09
JP2002146414A	2002-05-22
JPH06172825A	1994-06-21
JP2022014169A	2022-01-19
JP2012087375A	2012-05-10

SUGIMURA Kenji (JP)

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