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 PDFInfo
- 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
Links
- 239000011261 inert gas Substances 0.000 title abstract 8
- 238000000034 method Methods 0.000 title abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 238000007664 blowing Methods 0.000 abstract 4
- 239000012530 fluid Substances 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
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. 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.
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)
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)
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 |
-
2009
- 2009-10-20 DE DE102009049896A patent/DE102009049896A1/en not_active Withdrawn
-
2010
- 2010-01-22 EP EP10000617.0A patent/EP2216110B1/en active Active
Patent Citations (4)
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 |
---|---|
EP2216110B1 (en) | 2021-06-23 |
DE102009049896A1 (en) | 2010-08-05 |
EP2216110A2 (en) | 2010-08-11 |
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