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Title:
REFINING METHOD FOR MOLTEN IRON, AND METHOD OF AND DEVICE FOR ANALYZING COMPOSITION OF HIGH-TEMPERATURE MATERIAL
Document Type and Number:
Japanese Patent JP2016145405
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a refining method for molten iron including the steps of quickly at high accuracy measuring the component of a slag left in a furnace, and determining a proper addition amount of a slag-making agent on the basis of the measurement result when carrying out refining of the next process for the molten iron or refining of the next charged molten iron in such a state that a part of the slag is left in a converter type refining furnace.SOLUTION: A refining method for a molten iron 4 includes the steps of: quantitatively analyzing the component of a slag 5 generated in refining of the molten iron 4 without collecting an analysis sample from the slag 5 when refining the molten iron left in a converter type refining furnace 1 or the molten iron 4 newly charged in the converter type refining furnace 1 in such a state that a part of the slag 5 generated in refining of the molten iron 4 in the converter type refining furnace 1 is left in the furnace 1; and determining on the basis of the component analysis result, the amounts of a slag-making agent to be added before refining and/or during refining in refining of the molten iron 4 left in the furnace 1 in which the slag 5 is left in the next process, or refining of the next charged molten iron 4 using the molten iron 4 newly charged in the furnace 1.SELECTED DRAWING: Figure 2

Inventors:
OGASAWARA YASUSHI
ISHIDA TOMOHARU
OKUYAMA GORO
UCHIDA YUICHI
Application Number:
JP2015145549A
Publication Date:
August 12, 2016
Filing Date:
July 23, 2015
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
C21C1/02; C21C1/04; C21C5/28; C21C5/36; C21C5/46; F27D21/00; G01N21/63; G01N33/24
Domestic Patent References:
JP2010126790A2010-06-10
JPH0815153A1996-01-19
JP2011038142A2011-02-24
JPS5544512A1980-03-28
JPH08199219A1996-08-06
JPS56983A1981-01-08
Attorney, Agent or Firm:
Shigeru Inoue
Kazuhiro Mori