JPS563614A - Refining method of steel - Google Patents
Refining method of steelInfo
- Publication number
- JPS563614A JPS563614A JP7738979A JP7738979A JPS563614A JP S563614 A JPS563614 A JP S563614A JP 7738979 A JP7738979 A JP 7738979A JP 7738979 A JP7738979 A JP 7738979A JP S563614 A JPS563614 A JP S563614A
- Authority
- JP
- Japan
- Prior art keywords
- steel bath
- nozzles
- stirring
- converter
- 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.)
- Granted
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 let the stirring of molten metal at the end period of blowing be done sufficinetly and improve refining efficiency by making combined provision of the double pipe nozzles of the specific shape to the underside of the steel bath of an oxygen top blowing converter and performing gas blowing under the fixed conditions. CONSTITUTION:In the operation of the top blowing converter, the production of CO decreases owing to the decrease in the C content and the stirring action of the steel bath by CO decreases in the end period of refinng. In order to prevent this and improve the refining efficiency of the converter, a plurality of double pipe nozzles of such shape, size and pressure conditions as to satisfy the formulas are provided to the underside of the steel bath and one or two more kinds of inert gasses such as Ar, Kr, Xe are blown into the steel bath through the slits 5 between the inside pipes 6 and outside pipes 7. The ratio Po/Pe of the outlet pressure Po of the gasses of that time and the static pressure Pe of the steel bath around the nozzles is made 1.89 or more. The gases are blown stably without the entry of the steel bath into the nozzles, whereby the stirring of the steel bath is accomplished sufficiently and the decarburization refining, etc. are accelerated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7738979A JPS5844121B2 (en) | 1979-06-18 | 1979-06-18 | steel refining method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7738979A JPS5844121B2 (en) | 1979-06-18 | 1979-06-18 | steel refining method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS563614A true JPS563614A (en) | 1981-01-14 |
JPS5844121B2 JPS5844121B2 (en) | 1983-10-01 |
Family
ID=13632527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7738979A Expired JPS5844121B2 (en) | 1979-06-18 | 1979-06-18 | steel refining method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5844121B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61142626A (en) * | 1984-12-14 | 1986-06-30 | Toshiba Corp | Impregnated cathode |
-
1979
- 1979-06-18 JP JP7738979A patent/JPS5844121B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61142626A (en) * | 1984-12-14 | 1986-06-30 | Toshiba Corp | Impregnated cathode |
Also Published As
Publication number | Publication date |
---|---|
JPS5844121B2 (en) | 1983-10-01 |
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