EP2216110A3 - Impulse coiling with inert gas in BOF and AOD converter process - Google Patents

Impulse coiling with inert gas in BOF and AOD converter process Download PDF

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Publication number
EP2216110A3
EP2216110A3 EP10000617.0A EP10000617A EP2216110A3 EP 2216110 A3 EP2216110 A3 EP 2216110A3 EP 10000617 A EP10000617 A EP 10000617A EP 2216110 A3 EP2216110 A3 EP 2216110A3
Authority
EP
European Patent Office
Prior art keywords
inert gas
side nozzles
bof
period
coiling
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
EP10000617.0A
Other languages
German (de)
French (fr)
Other versions
EP2216110A2 (en
EP2216110B1 (en
Inventor
Hans-Jürgen ODENTHAL
Udo Falkenreck
Guido Kleinschmidt
Jochen SCHLÜTER
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP2216110A2 publication Critical patent/EP2216110A2/en
Publication of EP2216110A3 publication Critical patent/EP2216110A3/en
Application granted granted Critical
Publication of EP2216110B1 publication Critical patent/EP2216110B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • C21C5/34—Blowing through the bath
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

Bei einem Verfahren zur Behandlung einer Eisenschmelze in einem Konverter, bei welchem die Eisenschmelze während einer Blasphase durch oberseitiges Aufblasen von Sauerstoff behandelt wird und wobei zumindest während eines Zeitabschnittes der Blasphase konverterbodenseitig über mehrere Boden- oder Seitendüsen ein Inertgas oder ein Inertgas enthaltendes Fluid in die Schmelze eingeblasen wird, soll eine Lösung geschaffen werden, die es ermöglicht, den Inertgasverbrauch bei der Durchführung von BOF- oder AOD-Konverterprozessen zu reduzieren, ohne dass sich Auswirkungen auf die erzielbare Stahlqualität ergeben. Dies wird dadurch erreicht, dass zumindest über einen Zeitraum während des Zeitabschnittes der Blasphase ein erster Teil der Boden- oder Seitendüsen mit einem mäßigen, den Durchsatz einer diesen ersten Teil an Boden- oder Seitendüsen freihaltenden Freihalte-Spülgasmenge an Inertgas bewirkenden Inertgas-Fluiddruck und der verbleibende Teil der Boden- oder Seitendüsen mit einem demgegenüber erhöhten, den Durchsatz einer Standard-Spülgasmenge an Inertgas bewirkenden Inertgas-Fluiddruck beaufschlagt wird.

Figure imgaf001
In a process for the treatment of an iron melt in a converter, wherein the molten iron is treated during a blowing phase by top blowing oxygen and at least during a period of the blowing phase on the bottom side over a plurality of bottom or side nozzles an inert gas or an inert gas containing fluid in the melt A solution is to be created which makes it possible to reduce the consumption of inert gas when carrying out BOF or AOD converter processes without affecting the achievable steel quality. This is achieved in that at least over a period during the period of the blowing phase, a first part of the bottom or side nozzles with a moderate, the flow rate of this first part of bottom or side nozzles free-hold flushing gas amount of inert gas causing inert gas fluid pressure and the remaining part of the bottom or side nozzles with a contrast increased, the flow rate of a standard purge gas to inert gas causing inert gas fluid pressure is applied.
Figure imgaf001
EP10000617.0A 2009-01-22 2010-01-22 Impulse coiling with inert gas in BOF and AOD converter process Active EP2216110B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009005795 2009-01-22
DE102009049896A DE102009049896A1 (en) 2009-01-22 2009-10-20 Pulse flushing with inert gas in the BOF and AOD converter process

Publications (3)

Publication Number Publication Date
EP2216110A2 EP2216110A2 (en) 2010-08-11
EP2216110A3 true EP2216110A3 (en) 2017-02-08
EP2216110B1 EP2216110B1 (en) 2021-06-23

Family

ID=42309065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10000617.0A Active EP2216110B1 (en) 2009-01-22 2010-01-22 Impulse coiling with inert gas in BOF and AOD converter process

Country Status (2)

Country Link
EP (1) EP2216110B1 (en)
DE (1) DE102009049896A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511862A1 (en) * 1974-04-11 1975-10-23 Creusot Loire METHOD AND DEVICE FOR INJECTING RAYS OF DIFFERENT IMPULSES INTO METAL MELT
US4334921A (en) * 1979-04-16 1982-06-15 Nippon Steel Corporation Converter steelmaking process
US4382817A (en) * 1980-01-02 1983-05-10 Institute De Recherches De La Siderurgie Francaise Process for periodically and pneumatically stirring a bath of molten metal
EP1764421A2 (en) * 2002-08-21 2007-03-21 Voest-Alpine Industrieanlagenbau GmbH & Co. Device for decarbonising a steel melt

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05105925A (en) * 1991-10-17 1993-04-27 Nippon Steel Corp Metal bath type smelting reduction method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511862A1 (en) * 1974-04-11 1975-10-23 Creusot Loire METHOD AND DEVICE FOR INJECTING RAYS OF DIFFERENT IMPULSES INTO METAL MELT
US4334921A (en) * 1979-04-16 1982-06-15 Nippon Steel Corporation Converter steelmaking process
US4382817A (en) * 1980-01-02 1983-05-10 Institute De Recherches De La Siderurgie Francaise Process for periodically and pneumatically stirring a bath of molten metal
EP1764421A2 (en) * 2002-08-21 2007-03-21 Voest-Alpine Industrieanlagenbau GmbH & Co. Device for decarbonising a steel melt

Also Published As

Publication number Publication date
EP2216110A2 (en) 2010-08-11
EP2216110B1 (en) 2021-06-23
DE102009049896A1 (en) 2010-08-05

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