JPS55148712A - Production of low-nitrogen and low-oxygen steel and alloy - Google Patents
Production of low-nitrogen and low-oxygen steel and alloyInfo
- Publication number
- JPS55148712A JPS55148712A JP5570179A JP5570179A JPS55148712A JP S55148712 A JPS55148712 A JP S55148712A JP 5570179 A JP5570179 A JP 5570179A JP 5570179 A JP5570179 A JP 5570179A JP S55148712 A JPS55148712 A JP S55148712A
- Authority
- JP
- Japan
- Prior art keywords
- vessel
- alloy
- flow
- low
- 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.)
- Pending
Links
Abstract
PURPOSE: To prevent the nitrogen absorption at the tapping and obtain the clean steel (alloy) by spraying the specific amount of carbon materials into the molten steel (alloy) flow from an electric furnace and the molten metal in a heating vessel, then blowing non-oxidative gas into the vessel and performing de-oxidation treatment while limiting the N2 concentration.
CONSTITUTION: Carbon materials such as powdery (particulate) coke and graphite electrodes are sprayed at 0.6kg/t or more as pure carbon contents into the molten steel (alloy) flow of C <0.2% dissolved in an electric furnace and the molten in a heating furnace. This causes the O2 in the molten metal and the FeO in the slag to react with C to form CO which encloses the inside of the vessel and the entire part of the tapping flow and cut them from the atmosphere, thereby preventing nitrogen absorption. AT the same time, denitrification is caused by the vigorous stirring of the tapping flow and the bubbling action of the CO gas. Next, non-oxidative gas such as Ar is blown into the vessel to maintain the N2 concentration in the vessel at 5% or less, thus deoxidation treatment is done while suppressing the nitrogen absorption.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5570179A JPS55148712A (en) | 1979-05-09 | 1979-05-09 | Production of low-nitrogen and low-oxygen steel and alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5570179A JPS55148712A (en) | 1979-05-09 | 1979-05-09 | Production of low-nitrogen and low-oxygen steel and alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55148712A true JPS55148712A (en) | 1980-11-19 |
Family
ID=13006190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5570179A Pending JPS55148712A (en) | 1979-05-09 | 1979-05-09 | Production of low-nitrogen and low-oxygen steel and alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55148712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277467A (en) * | 2010-06-09 | 2011-12-14 | 鞍钢股份有限公司 | Method for denitrifying molten steel in tapping process of converter |
-
1979
- 1979-05-09 JP JP5570179A patent/JPS55148712A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277467A (en) * | 2010-06-09 | 2011-12-14 | 鞍钢股份有限公司 | Method for denitrifying molten steel in tapping process of converter |
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