METHOD FOR ANALYZING NITROGEN IN METAL SAMPLES, DEVICE FOR ANALYZING NITROGEN IN METAL SAMPLES, METHOD FOR ADJUSTING NITROGEN CONCENTRATION IN MOLTEN STEEL, AND STEEL PRODUCTION METHOD

Title:

METHOD FOR ANALYZING NITROGEN IN METAL SAMPLES, DEVICE FOR ANALYZING NITROGEN IN METAL SAMPLES, METHOD FOR ADJUSTING NITROGEN CONCENTRATION IN MOLTEN STEEL, AND STEEL PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2016/006147

Kind Code:

A1

Abstract:

Provided are: a method for analyzing nitrogen in metal samples, whereby the nitrogen content in a metal sample can be accurately quantified at low cost; a device for analyzing nitrogen in metal samples; a method for adjusting nitrogen concentration in molten steel; and a steel production method. This method for analyzing nitrogen in metal samples has: a melting step in which a metal sample containing a nitrogen component is melted in an argon gas environment by using impulse heating and the nitrogen component is vaporized; and an analysis step in which nitrogen gas generated in the melting step and the argon gas are analyzed using a gas electrical discharge and light-emission method and the nitrogen in the metal sample is quantified. As a result of this analysis method, the nitrogen concentration of a sample taken from molten metal is analyzed, conditions for adjusting nitrogen concentration are determined on the basis of the nitrogen analysis values obtained as a result of the analysis, and the nitrogen concentration of the molten metal is adjusted.

Inventors:

KINOSHIRO SATOSHI (JP)
INOSE MASAO (JP)

Application Number:

PCT/JP2015/002447

Publication Date:

January 14, 2016

Filing Date:

May 14, 2015

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

G01N21/67

Foreign References:

JP2003139708A	2003-05-14
JP2011099770A	2011-05-19
JP2000310606A	2000-11-07
JP2000055794A	2000-02-25

Other References: