JPS5625919A - Preparation of molten steel with low oxygen and high nitrogen - Google Patents

Preparation of molten steel with low oxygen and high nitrogen

Info

Publication number
JPS5625919A
JPS5625919A JP10191479A JP10191479A JPS5625919A JP S5625919 A JPS5625919 A JP S5625919A JP 10191479 A JP10191479 A JP 10191479A JP 10191479 A JP10191479 A JP 10191479A JP S5625919 A JPS5625919 A JP S5625919A
Authority
JP
Japan
Prior art keywords
nitrogen
molten steel
gas
vacuum
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10191479A
Other languages
Japanese (ja)
Inventor
Nobuaki Sugiyama
Tsuyoshi Tada
Toshiro Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Special Steel Co Ltd
Sanyo Tokushu Seiko KK
Original Assignee
Sanyo Special Steel Co Ltd
Sanyo Tokushu Seiko KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Special Steel Co Ltd, Sanyo Tokushu Seiko KK filed Critical Sanyo Special Steel Co Ltd
Priority to JP10191479A priority Critical patent/JPS5625919A/en
Publication of JPS5625919A publication Critical patent/JPS5625919A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Abstract

PURPOSE:To obtain economical molten steel with low oxygen and high nitrogen without variation of components other than nitrogen by using nitrogen for lifting gas or mixing gas to increase the partial pressure of nitrogen. CONSTITUTION:After applying dehydrogenation and deoxydation sufficiently to molten steel at the high degree of vacuum, the exhaust capacity of the vacuum pump is reduced and nitrogen is continued to be sent while decreasing the opening of valve B. When argon gas has been used, nitrogen gas is sent instead of argon to make the inside of the vacuum case nitrogen gas atmosphere. At the time, the molten steel is violently agitated and contacted with nitrogen gas. Thus, a required volume of nitrogen can be added into the molten steel at the speed corresponding to the partial pressure of nitrogen and the composition of molten steel. After adding nitrogen to the molten steel, the vacuum gas separating case is opened and the ladle is sent to an ingot making plant.
JP10191479A 1979-08-09 1979-08-09 Preparation of molten steel with low oxygen and high nitrogen Pending JPS5625919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10191479A JPS5625919A (en) 1979-08-09 1979-08-09 Preparation of molten steel with low oxygen and high nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10191479A JPS5625919A (en) 1979-08-09 1979-08-09 Preparation of molten steel with low oxygen and high nitrogen

Publications (1)

Publication Number Publication Date
JPS5625919A true JPS5625919A (en) 1981-03-12

Family

ID=14313169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10191479A Pending JPS5625919A (en) 1979-08-09 1979-08-09 Preparation of molten steel with low oxygen and high nitrogen

Country Status (1)

Country Link
JP (1) JPS5625919A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139808A (en) * 1985-12-11 1987-06-23 Nippon Kokan Kk <Nkk> Rh degassing method
JPS63282208A (en) * 1987-05-15 1988-11-18 Aichi Steel Works Ltd Method for operating rh type vacuum degasification equipment in low vacuum
JPH0293016A (en) * 1988-09-29 1990-04-03 Kawasaki Steel Corp Method for refining high-n stainless steel
US5863615A (en) * 1995-10-31 1999-01-26 Yazaki Corporation Plating jig and plating method using the plating jig
US6310284B1 (en) 1996-05-07 2001-10-30 Yazaki Corporation Shield-plated corrugated tube

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514014A (en) * 1974-07-02 1976-01-13 Nippon Steel Corp MITSUPEIGATASHINKUSEIRENSOCHINYORU YOKONO KO CHUTANIKIDATSUTANHOHO
JPS5112320A (en) * 1974-07-22 1976-01-30 Nisshin Steel Co Ltd GANCHITSUSOGOKINKONO SEIZOHO

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514014A (en) * 1974-07-02 1976-01-13 Nippon Steel Corp MITSUPEIGATASHINKUSEIRENSOCHINYORU YOKONO KO CHUTANIKIDATSUTANHOHO
JPS5112320A (en) * 1974-07-22 1976-01-30 Nisshin Steel Co Ltd GANCHITSUSOGOKINKONO SEIZOHO

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139808A (en) * 1985-12-11 1987-06-23 Nippon Kokan Kk <Nkk> Rh degassing method
JPS63282208A (en) * 1987-05-15 1988-11-18 Aichi Steel Works Ltd Method for operating rh type vacuum degasification equipment in low vacuum
JPH0293016A (en) * 1988-09-29 1990-04-03 Kawasaki Steel Corp Method for refining high-n stainless steel
US5863615A (en) * 1995-10-31 1999-01-26 Yazaki Corporation Plating jig and plating method using the plating jig
US6310284B1 (en) 1996-05-07 2001-10-30 Yazaki Corporation Shield-plated corrugated tube
US6689281B2 (en) 1996-05-07 2004-02-10 Yazaki Corporation Shield-plated corrugated tube

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