JPS57137415A - Steel making method for chromium-containing steel - Google Patents
Steel making method for chromium-containing steelInfo
- Publication number
- JPS57137415A JPS57137415A JP2095181A JP2095181A JPS57137415A JP S57137415 A JPS57137415 A JP S57137415A JP 2095181 A JP2095181 A JP 2095181A JP 2095181 A JP2095181 A JP 2095181A JP S57137415 A JPS57137415 A JP S57137415A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- lance
- steel
- siphoning
- discharging
- 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 perform vacuum decarbonization of chromium-contg. steel by performing siphoning-discharging of the molten steel such a way that the molten steel remains at a minimum during discharging as well, and supplying oxygen to the molten steel surface at a specific flow rate through a lance having a de Laval type nozzle by maintaining the perpendicular distance between the lance and the molten steel level during siphoning at specific distances.
CONSTITUTION: In the case of decarbonizing and refining chromium-contg. steel with gaseous oxygen in an oscillation type vacuum treatment device, the siphoning-discharging of the molten steel are so regulated that the amt. of the molten steel in a vacuum vessel during discharging is 3W6% the total amt. of the molten steel. Here, a lance having, in its leading end, a de Laval nozzle designed to provide the prescribed Mach number of the de Laval nozzle under the upper limit pressure of the fluctuation width of the atmospheric pressure in the vessel during blowing is provided in the vacuum vessel, and oxygen is supplied through this lance to the molten metal surface at 10W30Nm3/h.t flow rates and the perpendicular distance between the lance and the molten steel surface during siphoning is maintained at 1W2m.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095181A JPS57137415A (en) | 1981-02-17 | 1981-02-17 | Steel making method for chromium-containing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095181A JPS57137415A (en) | 1981-02-17 | 1981-02-17 | Steel making method for chromium-containing steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57137415A true JPS57137415A (en) | 1982-08-25 |
| JPS6157886B2 JPS6157886B2 (en) | 1986-12-09 |
Family
ID=12041493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2095181A Granted JPS57137415A (en) | 1981-02-17 | 1981-02-17 | Steel making method for chromium-containing steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57137415A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013226628A (en) * | 2012-04-26 | 2013-11-07 | Taiyo Nippon Sanso Corp | Dry ice jetting nozzle and dry ice jetting apparatus |
| JP2020111775A (en) * | 2019-01-10 | 2020-07-27 | 日本製鉄株式会社 | Refining method of molten steel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006070285A (en) * | 2004-08-31 | 2006-03-16 | Jfe Steel Kk | Method for refining molten metal under reduced pressure and top-blowing lance for refining |
-
1981
- 1981-02-17 JP JP2095181A patent/JPS57137415A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013226628A (en) * | 2012-04-26 | 2013-11-07 | Taiyo Nippon Sanso Corp | Dry ice jetting nozzle and dry ice jetting apparatus |
| JP2020111775A (en) * | 2019-01-10 | 2020-07-27 | 日本製鉄株式会社 | Refining method of molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6157886B2 (en) | 1986-12-09 |
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