EP0062548B1 - Verfahren zur Gasumrührung eines Metallbades - Google Patents

Verfahren zur Gasumrührung eines Metallbades Download PDF

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Publication number
EP0062548B1
EP0062548B1 EP82400345A EP82400345A EP0062548B1 EP 0062548 B1 EP0062548 B1 EP 0062548B1 EP 82400345 A EP82400345 A EP 82400345A EP 82400345 A EP82400345 A EP 82400345A EP 0062548 B1 EP0062548 B1 EP 0062548B1
Authority
EP
European Patent Office
Prior art keywords
bath
stirring
inert gas
nitrogen
fluid
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.)
Expired
Application number
EP82400345A
Other languages
English (en)
French (fr)
Other versions
EP0062548A1 (de
Inventor
Jean-Claude Grosjean
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT82400345T priority Critical patent/ATE13075T1/de
Publication of EP0062548A1 publication Critical patent/EP0062548A1/de
Application granted granted Critical
Publication of EP0062548B1 publication Critical patent/EP0062548B1/de
Expired legal-status Critical Current

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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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • 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
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the present invention relates to the pneumatic mixing of a metal bath. It applies more particularly to the stirring of a bath of cast iron during refining in a converter to oxygen blown from above.
  • the fluid used is generally a chemically inert gas vis-à-vis the bath, such as argon -or preferably nitrogen due to its very low cost price.
  • the object of the present invention is to achieve high mixing gas flow rates while avoiding the difficulties encountered in known practices.
  • the subject of the invention is a process for pneumatically stirring a metal bath contained in a crucible, according to which a stirring agent consisting, at least, is injected through permeable refractory elements mounted in the bottom of the crucible. temporarily, with an organic fluid and characterized in that said fluid is a hydrocarbon in the liquid state.
  • liquid is meant an organic fluid in the liquid state under standard temperature and pressure conditions or easily liquefiable under low pressure, in this case under a pressure lower than the injection pressure in the permeable elements. (3 to 6 bars approximately).
  • a brewing fluid consisting of an organic liquid, for example propane, then, some time before the desired end of brewing - for example a few minutes before - the organic liquid is replaced by an inert gas, such as nitrogen or argon, depending on the maximum allowable nitrogen contents for the target shade.
  • an inert gas such as nitrogen or argon
  • stirring with inert gas provides a "washing" of the bath, which is thus freed from the dissolved hygrogen accumulated during initial stirring by the injection of organic liquid.
  • This particular implementation of the invention is entirely suitable for refining cast iron by conversion to oxygen with stirring with argon or nitrogen.
  • the invention therefore provides an efficient stirring of the bath during the refining process and this without risk of pollution of the metal by both hydrogen and nitrogen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treating Waste Gases (AREA)
  • Catalysts (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Soy Sauces And Products Related Thereto (AREA)

Claims (5)

1. Verfahren zur Gasumrührung eines Metallbades, das in einem Schmelztiegel enthalten ist, bei welchem durch die am Boden des Tiegels montierten, durchlässigen, feuerfesten Elemente hindurch ein Rührmittel eingeleitet wird, das zumindest temporär durch ein organisches Fluid gebildet wird, dadurch gekennzeichnet, dass das Fluid ein Kohlenwasserstoff ist, der bei Normaltemperatur und Normaldruck in flüssigem Zustand vorliegt oder unter einem Druck verflüssigbar ist, der niedriger als jener Druck ist, mit welchem das Fluid über die durchlässigen feuerfesten Elemente eingeleitet wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der flüssige Kohlenwasserstoff vor dem Ende des Rührvorganges durch ein inertes Gas ersetzt wird.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das inerte Gas Argon ist.
4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das inerte Gas Stickstoff ist.
5. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass bei einem Metallbad, das ein Roheisenbad beim Sauerstofffrischen ist, der flüssige Kohlenwasserstoff frühestens am Ende der Entkohlungsphase des Bades durch ein inertes Gas ersetzt wird.
EP82400345A 1981-03-11 1982-03-01 Verfahren zur Gasumrührung eines Metallbades Expired EP0062548B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400345T ATE13075T1 (de) 1981-03-11 1982-03-01 Verfahren zur gasumruehrung eines metallbades.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105017A FR2501722B1 (fr) 1981-03-11 1981-03-11 Procede de brassage pneumatique d'un bain metallique
FR8105017 1981-03-11

Publications (2)

Publication Number Publication Date
EP0062548A1 EP0062548A1 (de) 1982-10-13
EP0062548B1 true EP0062548B1 (de) 1985-05-02

Family

ID=9256183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400345A Expired EP0062548B1 (de) 1981-03-11 1982-03-01 Verfahren zur Gasumrührung eines Metallbades

Country Status (8)

Country Link
US (1) US4397684A (de)
EP (1) EP0062548B1 (de)
JP (1) JPS57161019A (de)
AT (1) ATE13075T1 (de)
AU (1) AU8055582A (de)
CA (1) CA1175236A (de)
DE (1) DE3263349D1 (de)
FR (1) FR2501722B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545393B1 (fr) * 1983-05-04 1985-09-06 Air Liquide Procede de production de particules solides metalliques a partir d'un bain metallique
SE8702338L (sv) * 1987-06-05 1988-12-06 Aga Ab Gasspolning av smaelta i skaenk
GB2255983A (en) * 1991-05-24 1992-11-25 Mexicano Investigacion Stirring metal melts with methane.
JP2002286602A (ja) * 2001-03-22 2002-10-03 Matsushita Electric Ind Co Ltd 溶液攪拌方法、溶液攪拌装置、これを用いたサンプルセル及びこれらを用いた溶液濃度計測装置
CN101892356B (zh) * 2010-07-21 2012-05-30 中国重型机械研究院有限公司 吹氩保护系统
CN112626350B (zh) * 2020-12-16 2021-11-30 东北大学 铝锂合金熔体深度净化的装置与方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032343A1 (de) * 1980-01-02 1981-07-22 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Verfahren zur Gasspülung eines Metallschmelzbades

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US42419A (en) * 1864-04-19 Petefls
BE609232A (fr) * 1961-10-16 1962-04-16 Centre Nat Rech Metall Perfectionnements aux procédés d'affinage de la fonte
FR90350E (fr) * 1965-10-21 1967-11-24 Air Liquide Procédé de traitement des métaux liquides, applicable notamment à l'élaboration de fonte nodulaire
BE752893A (fr) * 1969-07-08 1970-12-16 Forges De La Loire St Chamond Procede et dispositif de refroidissement d'une tuyere de convertisseur d'affinage
DE2147717A1 (de) * 1971-09-24 1973-03-29 Kloeckner Werke Ag Verfahren zum frischen von stahl
US3854932A (en) * 1973-06-18 1974-12-17 Allegheny Ludlum Ind Inc Process for production of stainless steel
FR2322202A1 (fr) * 1975-08-29 1977-03-25 Siderurgie Fse Inst Rech Procede d'elaboration d'acier par soufflage d'oxygene
LU82069A1 (fr) * 1980-01-09 1981-09-10 Arbed Procede d'affinage d'un bain de metal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032343A1 (de) * 1980-01-02 1981-07-22 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Verfahren zur Gasspülung eines Metallschmelzbades

Also Published As

Publication number Publication date
JPS57161019A (en) 1982-10-04
EP0062548A1 (de) 1982-10-13
US4397684A (en) 1983-08-09
FR2501722B1 (fr) 1986-08-14
CA1175236A (fr) 1984-10-02
DE3263349D1 (en) 1985-06-05
AU8055582A (en) 1982-09-16
ATE13075T1 (de) 1985-05-15
FR2501722A1 (fr) 1982-09-17

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