EP0196952A3 - Process for obtaining a killed steel with a low nitrogen content - Google Patents

Process for obtaining a killed steel with a low nitrogen content Download PDF

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Publication number
EP0196952A3
EP0196952A3 EP86400532A EP86400532A EP0196952A3 EP 0196952 A3 EP0196952 A3 EP 0196952A3 EP 86400532 A EP86400532 A EP 86400532A EP 86400532 A EP86400532 A EP 86400532A EP 0196952 A3 EP0196952 A3 EP 0196952A3
Authority
EP
European Patent Office
Prior art keywords
steel
ladle
killing
additives
pouring
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.)
Granted
Application number
EP86400532A
Other languages
French (fr)
Other versions
EP0196952A2 (en
EP0196952B1 (en
Inventor
Jean-Michel Naud
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9317817&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0196952(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT86400532T priority Critical patent/ATE56896T1/en
Publication of EP0196952A2 publication Critical patent/EP0196952A2/en
Publication of EP0196952A3 publication Critical patent/EP0196952A3/en
Application granted granted Critical
Publication of EP0196952B1 publication Critical patent/EP0196952B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing

Abstract

The process for producing killed steel having a low content of nitrogen comprises pouring an effervescent steel from a converter into a ladle in which there are added to the molten steel contained in the ladle, in the course of the pouring operation, additives for killing the steel, such as aluminium, silicon, etc. . . . The invention comprises pouring the effervescent steel into the ladle before introducing the killing additives, and prior to the introduction of the killing additives carbon dioxide in the form of carbon dioxide snow in the vicinity of the lower part of the pouring jet and on the surface of the bath of steel in the ladle in a quantity sufficient to protect the surface of the molten metal from the surrounding air upon the introduction of the killing additives into the ladle.
EP86400532A 1985-04-01 1986-03-13 Process for obtaining a killed steel with a low nitrogen content Expired - Lifetime EP0196952B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400532T ATE56896T1 (en) 1985-04-01 1986-03-13 PROCESS FOR MAKING KILLED LOW NITROGEN STEEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8504909 1985-04-01
FR8504909A FR2579495B1 (en) 1985-04-01 1985-04-01 METHOD FOR PROTECTING A METAL CASTING JET

Publications (3)

Publication Number Publication Date
EP0196952A2 EP0196952A2 (en) 1986-10-08
EP0196952A3 true EP0196952A3 (en) 1988-10-26
EP0196952B1 EP0196952B1 (en) 1990-09-26

Family

ID=9317817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400532A Expired - Lifetime EP0196952B1 (en) 1985-04-01 1986-03-13 Process for obtaining a killed steel with a low nitrogen content

Country Status (11)

Country Link
US (1) US4666511A (en)
EP (1) EP0196952B1 (en)
JP (1) JPS61235507A (en)
AT (1) ATE56896T1 (en)
AU (1) AU586856B2 (en)
BR (1) BR8601411A (en)
CA (1) CA1268044A (en)
DE (1) DE3674446D1 (en)
ES (1) ES8702810A1 (en)
FR (1) FR2579495B1 (en)
ZA (1) ZA862011B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4657587A (en) * 1985-02-21 1987-04-14 Canadian Liquid Air Ltd./Air Liquide Canada Ltee Molten metal casting
FR2607039B1 (en) * 1986-11-26 1989-03-31 Air Liquide STEEL CASTING PROCESS INCLUDING INERING OF THE STEEL BATH WITH CARBONIC ANHYDRIDE IN THE FORM OF SNOW
US4723997A (en) * 1987-04-20 1988-02-09 L'air Liquide Method and apparatus for shielding a stream of liquid metal
FR2623890B1 (en) * 1987-11-26 1990-03-30 Air Liquide CARBON SNOW LAUNCH FOR METALLURGY
DE3904415C1 (en) * 1989-02-14 1990-04-26 Intracon Handelsgesellschaft Fuer Industriebedarf M.B.H., 6200 Wiesbaden, De
DE59105739D1 (en) * 1991-11-28 1995-07-20 Carbagas Process for the suppression of dust and smoke in the production of electrical steel.
US5344478A (en) * 1993-08-02 1994-09-06 Air Products And Chemicals, Inc. Vortex dispersing nozzle for liquefied cryogenic inert gases used in blanketing of molten metals exposed to ambient air and method
WO1998021373A2 (en) * 1996-11-08 1998-05-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for reducing fume emissions during molten metal transfer
US6228187B1 (en) 1998-08-19 2001-05-08 Air Liquide America Corp. Apparatus and methods for generating an artificial atmosphere for the heat treating of materials
DE10038543A1 (en) * 2000-08-03 2002-02-14 Linde Gas Ag Process for protecting the surface of a magnesium melt
US6491863B2 (en) 2000-12-12 2002-12-10 L'air Liquide-Societe' Anonyme A' Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes George Claude Method and apparatus for efficient utilization of a cryogen for inert cover in metals melting furnaces
DE102006033698A1 (en) * 2006-07-20 2008-01-24 Linde Ag Method for casting magnesium
DE102011008894A1 (en) * 2011-01-19 2012-07-19 Air Liquide Deutschland Gmbh Method and nozzle for suppressing development of iron containing steam

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR434070A (en) * 1910-11-14 1912-01-24 Marcellin Reymondier New casting and molding process to obtain healthy and homogeneous steels, cast irons, metals or alloys
BE677958A (en) * 1966-03-16 1966-09-16
BE677957A (en) * 1966-03-16 1966-09-16
LU70560A1 (en) * 1973-07-24 1974-11-28

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052936A (en) * 1956-10-01 1962-09-11 Babcock & Wilcox Co Method of continuously casting metals
US3224051A (en) * 1962-01-31 1965-12-21 Brown Fintube Co Method of introducing addition agent into a melt
US3230074A (en) * 1962-07-16 1966-01-18 Chrysler Corp Process of making iron-aluminum alloys and components thereof
US3258328A (en) * 1962-08-23 1966-06-28 Fuji Iron & Steel Co Ltd Method and apparatus for treating steel
US4089678A (en) * 1975-08-01 1978-05-16 Hanawalt Joseph D Method and product for protecting molten magnesium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR434070A (en) * 1910-11-14 1912-01-24 Marcellin Reymondier New casting and molding process to obtain healthy and homogeneous steels, cast irons, metals or alloys
BE677958A (en) * 1966-03-16 1966-09-16
BE677957A (en) * 1966-03-16 1966-09-16
LU70560A1 (en) * 1973-07-24 1974-11-28

Also Published As

Publication number Publication date
EP0196952A2 (en) 1986-10-08
EP0196952B1 (en) 1990-09-26
JPS61235507A (en) 1986-10-20
BR8601411A (en) 1986-12-09
ES8702810A1 (en) 1987-01-16
ATE56896T1 (en) 1990-10-15
DE3674446D1 (en) 1990-10-31
ES553528A0 (en) 1987-01-16
CA1268044A (en) 1990-04-24
AU586856B2 (en) 1989-07-27
ZA862011B (en) 1986-10-29
FR2579495A1 (en) 1986-10-03
FR2579495B1 (en) 1987-09-11
AU5504686A (en) 1986-10-09
US4666511A (en) 1987-05-19

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