JPS5594427A - Bottom blowing decarbonization method in which sub-material is not used - Google Patents
Bottom blowing decarbonization method in which sub-material is not usedInfo
- Publication number
- JPS5594427A JPS5594427A JP258079A JP258079A JPS5594427A JP S5594427 A JPS5594427 A JP S5594427A JP 258079 A JP258079 A JP 258079A JP 258079 A JP258079 A JP 258079A JP S5594427 A JPS5594427 A JP S5594427A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- converter
- low
- bottom blowing
- molten iron
- 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 improve the yield of product molten steel without using any sub- material such as CaO in converter operation by the use of pretreated molten iron which has undergone desiliconization, desulfurization and dephosphorization at the time of refining medium carbon steel and high carbon steel in a bottom blowing converter. CONSTITUTION:Molten iron for steel making raw material is oxidation-refined by using alkali metal compounds such as Na2CO3, whereby its Si, S and P are removed into the molten slag. This low-silicon-, low-sulfur- and low-phosphorus molten iron is charged into the bottom blowing converter and oxygen, etc. are blown into the converter from its bottom. In this case, Si, S and P have berorehand been removed through the pretreatment, hence slag forming agents such as CaO are not used and the decarbonization refining is accomplished in the absence of slag. Hence, there are no Fe components to be carried away by the slag and the medium-to-high-carbon steels are produced at a high Fe yield.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2580A JPS5592261A (en) | 1979-01-05 | 1980-01-05 | Electromagnetic agitating device in continuous casting installation and its method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5594427A true JPS5594427A (en) | 1980-07-17 |
Family
ID=11462842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP258079A Pending JPS5594427A (en) | 1980-01-05 | 1979-01-13 | Bottom blowing decarbonization method in which sub-material is not used |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5594427A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57188610A (en) * | 1981-05-14 | 1982-11-19 | Nippon Steel Corp | Steelmaking method |
-
1979
- 1979-01-13 JP JP258079A patent/JPS5594427A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57188610A (en) * | 1981-05-14 | 1982-11-19 | Nippon Steel Corp | Steelmaking method |
| JPS6214001B2 (en) * | 1981-05-14 | 1987-03-31 | Nippon Steel Corp |
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