SE7408502L - - Google Patents

Info

Publication number
SE7408502L
SE7408502L SE7408502A SE7408502A SE7408502L SE 7408502 L SE7408502 L SE 7408502L SE 7408502 A SE7408502 A SE 7408502A SE 7408502 A SE7408502 A SE 7408502A SE 7408502 L SE7408502 L SE 7408502L
Authority
SE
Sweden
Prior art keywords
argon
oxygen
decarburization
melt
flow rate
Prior art date
Application number
SE7408502A
Other languages
Unknown language ( )
Inventor
B H Heise
R N Dokken
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of SE7408502L publication Critical patent/SE7408502L/

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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

An improved argon-oxygen decarburization process for refining stainless steel comprising injecting a three component gas mixture consisting of oxygen, argon and carbon dioxide into the molten steel during decarburization. The critical upper limit of CO2 injection into the melt is defined, below which the carbon removal efficiency is improved. The preferred flow rate of CO2 during each of the three principal phases of decarburization is set forth as a function of the flow rate of oxygen and argon, bath temperature and carbon content of the melt.
SE7408502A 1973-06-28 1974-06-27 SE7408502L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US374635A US3861888A (en) 1973-06-28 1973-06-28 Use of CO{HD 2 {B in argon-oxygen refining of molten metal

Publications (1)

Publication Number Publication Date
SE7408502L true SE7408502L (en) 1974-12-30

Family

ID=23477618

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7408502A SE7408502L (en) 1973-06-28 1974-06-27

Country Status (12)

Country Link
US (2) US3861888A (en)
JP (1) JPS5037611A (en)
AU (1) AU6944374A (en)
BE (1) BE816970A (en)
BR (1) BR7405267A (en)
DD (1) DD112468A5 (en)
FI (1) FI197874A (en)
FR (1) FR2235198B1 (en)
IL (1) IL45137A (en)
NO (1) NO742347L (en)
PL (1) PL88825B1 (en)
SE (1) SE7408502L (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR7801963A (en) * 1977-03-31 1978-10-24 Union Carbide Corp PROCESS FOR THE PRODUCTION OF METAL CASTED PIECES AS A FINAL PRODUCT, HAVING IMPROVED SURFACE QUALITY AND INTERNAL QUALITY
US4174212A (en) * 1978-03-10 1979-11-13 A. Finkl & Sons Co. Method for the refining of steel
DE2820555A1 (en) * 1978-05-11 1979-11-15 Basf Ag PROCESSES FOR THE TREATMENT OF PIG IRON AND STEEL MELT RESPECTIVELY. ALLOYS
US4490172A (en) * 1979-06-29 1984-12-25 Moore William H Method of melting and refining steel and other ferrous alloys
US4409028A (en) * 1979-10-24 1983-10-11 Moore William H Process for producing cast iron
US4260415A (en) * 1979-12-12 1981-04-07 Allegheny Ludlum Steel Corporation Decarburizing molten metal
US4436553A (en) 1982-01-22 1984-03-13 Union Carbide Corporation Process to produce low hydrogen steel
FR2560891B1 (en) * 1984-03-09 1989-10-20 Air Liquide CAST REFINING PROCESS
US4615730A (en) 1985-04-30 1986-10-07 Allegheny Ludlum Steel Corporation Method for refining molten metal bath to control nitrogen
US4746361A (en) * 1987-04-03 1988-05-24 Inland Steel Company Controlling dissolved oxygen content in molten steel
DE3912061A1 (en) * 1989-04-13 1990-10-18 Messer Griesheim Gmbh METHOD FOR PRODUCING ALLOY STEEL BRANDS
US5139569A (en) * 1989-04-13 1992-08-18 Messer Griesheim Process for the production of alloy steel grades using treatment gas consisting of CO2
US5190577A (en) * 1990-12-11 1993-03-02 Liquid Air Corporation Replacement of argon with carbon dioxide in a reactor containing molten metal for the purpose of refining molten metal
EP0544967B1 (en) * 1991-11-28 1995-06-14 Carbagas Process for suppression of dust and fumes during electric steel production
US5417739A (en) * 1993-12-30 1995-05-23 Ltv Steel Company, Inc. Method of making high nitrogen content steel
US5865876A (en) * 1995-06-07 1999-02-02 Ltv Steel Company, Inc. Multipurpose lance
US5830259A (en) * 1996-06-25 1998-11-03 Ltv Steel Company, Inc. Preventing skull accumulation on a steelmaking lance
US5885323A (en) * 1997-04-25 1999-03-23 Ltv Steel Company, Inc. Foamy slag process using multi-circuit lance
CN102146499A (en) * 2010-02-05 2011-08-10 鞍钢股份有限公司 AOD blowing CO2Smelting method for producing stainless steel
US9045805B2 (en) 2013-03-12 2015-06-02 Ati Properties, Inc. Alloy refining methods

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855293A (en) * 1955-03-21 1958-10-07 Air Liquide Method and apparatus for treating molten metal with oxygen
US3252790A (en) * 1956-06-27 1966-05-24 Union Carbide Corp Preparation of metals and alloys
US3003865A (en) * 1959-09-10 1961-10-10 Cameron Iron Works Inc Decarburizing process for alloy steels containing chromium
BE610265A (en) * 1960-11-18
US3397878A (en) * 1965-11-19 1968-08-20 Union Carbide Corp Under-bath tuyere
GB1253581A (en) * 1968-02-24 1971-11-17 Maximilianshuette Eisenwerk Improvements in processes and apparatus for making steel
BE755456A (en) * 1969-08-29 1971-03-01 Allegheny Ludlum Ind Inc DECARBURATION OF MELT STEEL
US3728101A (en) * 1970-11-09 1973-04-17 Armco Steel Corp Process for making stainless steel
FR2186974A5 (en) * 1972-05-31 1974-01-11 Air Liquide Decarburisation of iron and steel alloys - contg chromium by blowing with oxygen, carbon dioxide and a rare gas

Also Published As

Publication number Publication date
FR2235198B1 (en) 1978-01-20
AU6944374A (en) 1975-12-04
IL45137A0 (en) 1974-09-10
BE816970A (en) 1974-12-27
DE2430975B2 (en) 1975-09-04
PL88825B1 (en) 1976-09-30
JPS5037611A (en) 1975-04-08
IL45137A (en) 1976-09-30
FI197874A (en) 1974-12-29
BR7405267A (en) 1976-02-24
DE2430975A1 (en) 1975-01-09
US3861888A (en) 1975-01-21
DD112468A5 (en) 1975-04-12
FR2235198A1 (en) 1975-01-24
USRE29584E (en) 1978-03-21
NO742347L (en) 1975-01-27

Similar Documents

Publication Publication Date Title
SE7408502L (en)
GB1435189A (en) Process and equipment for blowing fine-grain reagents into steel melts
ATE64626T1 (en) PROCESS FOR SUPPLYING THERMAL ENERGY INTO A METAL METAL.
ES447754A1 (en) Method for the thermal refinement of greatly contaminated copper in molten phase
ES401949A1 (en) Method of opening an intermediate vessel nozzle for continuous casting
GB1502345A (en) Method for treating a metal melt
ES486145A1 (en) Argon in the basic oxygen process to control slopping
AU554800B2 (en) Metal refining using oxygen and powdered carbon
ES405391A1 (en) Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel
ZA878848B (en) Process of casting steel including rendering the steel bath inert by means of carbon dioxide in the form of dry ice
KR860008290A (en) Method to control nitrogen by refining molten metal bath
ES481107A1 (en) Process for the treatment of molten metal.
PT72324B (en) Process for the refining of a metal bath by means of a conver- ter having a top oxygen jet and converter for its accomplish- ment
JPS55158208A (en) Refining method of steel
DE3263349D1 (en) Process for gas-stirring a metal bath
DE3572996D1 (en) Rapid decarburization steelmaking process
JPS5378913A (en) Refining method for steel for decreasing generating amount of slag
ES461969A1 (en) Process for refining molten iron by the injection of oxygen
JPS552759A (en) Manufacture of ultra-low-carbon stainless steel
ES399219A1 (en) Process for decarburization of steels
FR2204692A1 (en) Making addns to steel melts - in ladles without slag contamination
GB1448237A (en) Oxygen lancing techniques
GB1530824A (en) Method of treating cast-iron melts
JPS55158210A (en) Production of extra low carbon steel
JPS56150121A (en) Stirring method in refining molten iron in vessel