JPS5644711A - Decarbonization method of molten steel under reduced pressure - Google Patents
Decarbonization method of molten steel under reduced pressureInfo
- Publication number
- JPS5644711A JPS5644711A JP11790879A JP11790879A JPS5644711A JP S5644711 A JPS5644711 A JP S5644711A JP 11790879 A JP11790879 A JP 11790879A JP 11790879 A JP11790879 A JP 11790879A JP S5644711 A JPS5644711 A JP S5644711A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- vacuum vessel
- tuyere
- vessel
- refined
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE: To decarbonize and refine molten steel without eroding blowing tuyeres by blowing CO2 gas into molten steel from the underside of the steel bath at the time of degassing and refining the molten steel with an RH type vacuum degassing device etc.
CONSTITUTION: The molten steel 5 to be refined is put into a vessel 1 such as ladle, and reflux pipes 4, 4 for molten steel of an RH vacuum vessel 2 are immersed therein. The inside of the vacuum vessel 2 is exhausted and evacuated to blow the molten steel in the vessel 1 into the vacuum vessel 2. On the other hand, an inert gas such as Ar or N2 is blown through the lower tuyere 6 of one reflux pipe 4 and is allowed to ascend as bubbles. The action thereof causes the molten steel 5 in the vacuum vessel 2 to be circulated with the molten steel in the ladle 1 through the two reflux pipes 4, 4, whereby the molten steel is degassed and refined in the vacuum vessel 2. At the same time, CO2 gas is blown through the tuyere 3 under the steel bath surface in the vacuum vessel 2 so that the C in the molten steel is decarbonized and refined by C+CO2=2CO. Since the said reaction is endothermic reaction, the tuyere 3 is cooled and the erosion of the tuyere 3 owing to a high temperature does not occur.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11790879A JPS5644711A (en) | 1979-09-17 | 1979-09-17 | Decarbonization method of molten steel under reduced pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11790879A JPS5644711A (en) | 1979-09-17 | 1979-09-17 | Decarbonization method of molten steel under reduced pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5644711A true JPS5644711A (en) | 1981-04-24 |
Family
ID=14723158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11790879A Pending JPS5644711A (en) | 1979-09-17 | 1979-09-17 | Decarbonization method of molten steel under reduced pressure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5644711A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724015A (en) * | 1984-05-04 | 1988-02-09 | Nippon Steel Corporation | Method for improving the magnetic properties of Fe-based amorphous-alloy thin strip |
| WO1994029488A1 (en) * | 1993-06-04 | 1994-12-22 | Nippon Steel Corporation | Method of manufacturing low carbon molten steel by vacuum degasification and decarbonization |
-
1979
- 1979-09-17 JP JP11790879A patent/JPS5644711A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724015A (en) * | 1984-05-04 | 1988-02-09 | Nippon Steel Corporation | Method for improving the magnetic properties of Fe-based amorphous-alloy thin strip |
| WO1994029488A1 (en) * | 1993-06-04 | 1994-12-22 | Nippon Steel Corporation | Method of manufacturing low carbon molten steel by vacuum degasification and decarbonization |
| CN1037783C (en) * | 1993-06-04 | 1998-03-18 | 新日本制铁株式会社 | Method of manufacturing low carbon molten steel by vacuum degasification and decarbonization |
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