JPS55158210A - Production of extra low carbon steel - Google Patents
Production of extra low carbon steelInfo
- Publication number
- JPS55158210A JPS55158210A JP6701979A JP6701979A JPS55158210A JP S55158210 A JPS55158210 A JP S55158210A JP 6701979 A JP6701979 A JP 6701979A JP 6701979 A JP6701979 A JP 6701979A JP S55158210 A JPS55158210 A JP S55158210A
- Authority
- JP
- Japan
- Prior art keywords
- blowing
- inert gas
- low carbon
- extra low
- steel
- 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.)
- Pending
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To readily decarbonize molten steel down to an extra low carbon region with less gas consumption by controlling the flow of inert gas by the specific system at the time of decarbonizing and refining the molten steel by blowing inert gas from furnace bottom nozzles in combination with oxygen top blowing or independently. CONSTITUTION:After the molten steel is decarbonized and refined down to a C content of about 0.05% by oxygen top blowing refining, the CO partial pressure in the steel bath is lowered and further it is decarbonized and refined without considerably oxidizing Fe. In this case, it is decarbonized down to an extra low carbon region of C<0.01% by blowing inert gas such as Ar from the nozzles provided in the bottom of the converter. The inert gas is blown by controlling its amount by the quantity Q calculated by formula (1) from the carbon concentration (i) of the steel bath at the start of bottom blowing of inert gas and the bottom blowing lapse time (t). This methdo decrease the consumption of costly Ar gas and enables the inexpensive production of the extra low carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6701979A JPS55158210A (en) | 1979-05-30 | 1979-05-30 | Production of extra low carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6701979A JPS55158210A (en) | 1979-05-30 | 1979-05-30 | Production of extra low carbon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55158210A true JPS55158210A (en) | 1980-12-09 |
Family
ID=13332762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6701979A Pending JPS55158210A (en) | 1979-05-30 | 1979-05-30 | Production of extra low carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55158210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938317A (en) * | 1982-08-25 | 1984-03-02 | Kawasaki Steel Corp | Method for refining dead soft steel |
| US5897684A (en) * | 1997-04-17 | 1999-04-27 | Ltv Steel Company, Inc. | Basic oxygen process with iron oxide pellet addition |
-
1979
- 1979-05-30 JP JP6701979A patent/JPS55158210A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938317A (en) * | 1982-08-25 | 1984-03-02 | Kawasaki Steel Corp | Method for refining dead soft steel |
| US5897684A (en) * | 1997-04-17 | 1999-04-27 | Ltv Steel Company, Inc. | Basic oxygen process with iron oxide pellet addition |
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