METHOD FOR SMELTING STEEL - NIPPON STEEL & SUMITOMO METAL CORP

Title:

METHOD FOR SMELTING STEEL

Document Type and Number:

WIPO Patent Application WO/2018/155334

Kind Code:

A1

Abstract:

This method for smelting steel formed of an Al-killed steel containing Mn and Ti comprises a primary refining step for performing primary refining in a converter furnace, and a secondary refining step for transferring molten steel from the converter furnace to a treatment furnace, and adjusting the component composition of the molten steel in the treatment furnace, wherein the secondary refining step includes an Al raw material supply step for supplying an Al raw material to the molten steel in the treatment furnace, a Mn raw material supply step for supplying a Mn raw material to the molten steel in the treatment furnace simultaneously with or after the Al raw material supply step, and a Ti raw material supply step for supplying a Ti raw material to the molten steel in the treatment furnace after the Al raw material supply step, and simultaneously with or after the Mn raw material supply step.

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Inventors:

TERAZAWA SOICHI (JP)
KOKUBUN KIICHIRO (JP)

Application Number:

PCT/JP2018/005473

Publication Date:

August 30, 2018

Filing Date:

February 16, 2018

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C21C7/06; B22D1/00; C21C7/04; C21C7/072

Foreign References:

JP2014025111A	2014-02-06
JP2013095947A	2013-05-20
JP2002030330A	2002-01-31
JPS61284517A	1986-12-15