JPS6452016A - Method for controlling molten steel temperature in vacuum ladle refining for high chromium steel - Google Patents
Method for controlling molten steel temperature in vacuum ladle refining for high chromium steelInfo
- Publication number
- JPS6452016A JPS6452016A JP20883987A JP20883987A JPS6452016A JP S6452016 A JPS6452016 A JP S6452016A JP 20883987 A JP20883987 A JP 20883987A JP 20883987 A JP20883987 A JP 20883987A JP S6452016 A JPS6452016 A JP S6452016A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- blowing
- gas
- steel
- molten
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 10
- 239000010959 steel Substances 0.000 title abstract 10
- 238000007670 refining Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- 229910001220 stainless steel Inorganic materials 0.000 title 1
- 238000007664 blowing Methods 0.000 abstract 7
- 239000007789 gas Substances 0.000 abstract 5
- 239000011261 inert gas Substances 0.000 abstract 3
- 239000002912 waste gas Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE:To freely adjust molten steel temp. by decreasing O2 gas for blowing to the limited flow rate from O2 quantity in waste gas and holding the gas pressure for blowing with inert gas at the time of refining with oxygen top blowing while stirring the molten high Cr steel in a ladle in vacuum vessel. CONSTITUTION:The ladle 4 charging the molten high Cr steel 2 is set in the vacuum vessel 6 and by blowing the inert gas of Ar, etc., from blowing hole 14 at the bottom part, the molten metal 2 is stirred and also by blowing O2 gas on the surface of the molten steel 2 from a top blowing lance 16, C in the molten steel 2 is oxidized and decarbonized. As the ladle 4 is set in the vacuum vessel 6, CO partial pressure in the atmosphere is low, and C in the molten steel is oxidized with priority without oxidizing Cr in the molten steel. In this case, the waste gas is taken from a dust 10 and the remained O2 is analyzed by a continuously analyzer 20 and the O2 limited flow rate from the lance 16 at the time when the remained O2 quantity starts to rapidly increase, is found. The gas pressure from the lance 16 by mixing inert gas of Ar, etc., is held to normal-state and lowering of penetration of the mixed gas into the molten steel is prevented, and lowering of decarbonizing reaction after that caused by the lowering of the molten steel temp. is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62208839A JPH0735530B2 (en) | 1987-08-22 | 1987-08-22 | Molten Steel Temperature Control Method in Vacuum Ladle Refining of High Chromium Steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62208839A JPH0735530B2 (en) | 1987-08-22 | 1987-08-22 | Molten Steel Temperature Control Method in Vacuum Ladle Refining of High Chromium Steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452016A true JPS6452016A (en) | 1989-02-28 |
| JPH0735530B2 JPH0735530B2 (en) | 1995-04-19 |
Family
ID=16562958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62208839A Expired - Fee Related JPH0735530B2 (en) | 1987-08-22 | 1987-08-22 | Molten Steel Temperature Control Method in Vacuum Ladle Refining of High Chromium Steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735530B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100782708B1 (en) * | 2001-12-21 | 2007-12-05 | 주식회사 포스코 | Preventing molten steel from vacuum decarburization equipment |
| CN101942541A (en) * | 2010-09-08 | 2011-01-12 | 莱芜钢铁股份有限公司 | Argon blowing and powder injection device and ladle refining furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633445A (en) * | 1979-08-28 | 1981-04-03 | Tanaka Kikinzoku Kogyo Kk | Ag-oxide electrical contact material |
-
1987
- 1987-08-22 JP JP62208839A patent/JPH0735530B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633445A (en) * | 1979-08-28 | 1981-04-03 | Tanaka Kikinzoku Kogyo Kk | Ag-oxide electrical contact material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100782708B1 (en) * | 2001-12-21 | 2007-12-05 | 주식회사 포스코 | Preventing molten steel from vacuum decarburization equipment |
| CN101942541A (en) * | 2010-09-08 | 2011-01-12 | 莱芜钢铁股份有限公司 | Argon blowing and powder injection device and ladle refining furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0735530B2 (en) | 1995-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |