JPS5779109A - Slag cutting method in converter during tapping - Google Patents
Slag cutting method in converter during tappingInfo
- Publication number
- JPS5779109A JPS5779109A JP15406380A JP15406380A JPS5779109A JP S5779109 A JPS5779109 A JP S5779109A JP 15406380 A JP15406380 A JP 15406380A JP 15406380 A JP15406380 A JP 15406380A JP S5779109 A JPS5779109 A JP S5779109A
- Authority
- JP
- Japan
- Prior art keywords
- tapping
- back pressure
- slag
- flow rate
- molten 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
Abstract
PURPOSE: To prevent the inclusion of slag and to perform slag cutting surely and safely by controlling a furnace body tilting device by means of the back pressure detection signal for the inert gas blown into the molten steel in the furnace during tapping.
CONSTITUTION: Plural nozzles 5 are provided in positions around the tap hole 2 of a furnace body 1 where they immerse in the molten steel at all times during tapping. Upon completion of blowing, the body 1 is tilted by a tilting device, and an inert gas is blown at a constant flow rate from the nozzles 5. During tapping, the molten steel level acts and the flow rate goes toward a decreasing direction but a flow rate control valve 13 operates upon decreasing of the pressure difference before and behind an orifice 10 in accordance with this, thereby maintaining the flow rate constant. The detected back pressure P of a back pressure detecting part 7 goes higher by as much as the molten steel level. As the tapping progresses, the back pressure P drops and when the tapping completes, it equals to the pressure of slag 4. The back pressure P is inputted to a control part 9. The part 9 is beforehand set with the value corresponding to the back pressure at the completion of tapping and at the same instant when the completion of the tapping is detected, the furnance body 1 is erected to the home position. The slag in the hole 2 is expelled by blowing of gas and the inclusin thereof into the tapping flow is prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15406380A JPS5933166B2 (en) | 1980-10-31 | 1980-10-31 | Slot cutting method in converter during tapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15406380A JPS5933166B2 (en) | 1980-10-31 | 1980-10-31 | Slot cutting method in converter during tapping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5779109A true JPS5779109A (en) | 1982-05-18 |
| JPS5933166B2 JPS5933166B2 (en) | 1984-08-14 |
Family
ID=15576082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15406380A Expired JPS5933166B2 (en) | 1980-10-31 | 1980-10-31 | Slot cutting method in converter during tapping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5933166B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0359828A1 (en) * | 1988-03-09 | 1990-03-28 | Kawasaki Steel Corporation | Method for detecting slag flow |
| KR100635780B1 (en) | 1999-12-30 | 2006-10-17 | 주식회사 포스코 | Electric furnace having gas blowing nozzle for forming gas curtain and method for preventing of carry-over slag during tapping |
-
1980
- 1980-10-31 JP JP15406380A patent/JPS5933166B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0359828A1 (en) * | 1988-03-09 | 1990-03-28 | Kawasaki Steel Corporation | Method for detecting slag flow |
| US5028033A (en) * | 1988-03-09 | 1991-07-02 | Kawasaki Steel Corporation | Process for detecting outflow of slag |
| KR100635780B1 (en) | 1999-12-30 | 2006-10-17 | 주식회사 포스코 | Electric furnace having gas blowing nozzle for forming gas curtain and method for preventing of carry-over slag during tapping |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5933166B2 (en) | 1984-08-14 |
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