JPS57164907A - Production of steel having different contents of c from same molten iron - Google Patents
Production of steel having different contents of c from same molten ironInfo
- Publication number
- JPS57164907A JPS57164907A JP5160581A JP5160581A JPS57164907A JP S57164907 A JPS57164907 A JP S57164907A JP 5160581 A JP5160581 A JP 5160581A JP 5160581 A JP5160581 A JP 5160581A JP S57164907 A JPS57164907 A JP S57164907A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- refining
- tapping
- molten 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To produce high carbon special steel of different contents of C efficiently from the same molten steel by using the low P molten iron which is beforehand reduced of conent of P to the prescribed content or below, subjecting the same to refining consisting essentially of decarbonization in an oxygen refining furnace, and tapping a constant amt. of the molten steel at every prescribed content of C. CONSTITUTION:Molten iron is beforehand subjected to pretreatments to prepare low P molten iron of <=0.050%, more preferably <=0.020% P. Then, this low P molten steel is subjected to the refining virtually similar to ordinary refining from the start of the refining till the first tapping. In the refining succeeding to this, the rate of feeding oxygen is lowered in consideration for the decrease in the amt. of the molten steel by the first tapping whereby the steel ingot is produced. In the process of this invention, the prescribed amt. of the molten steel is tapped at every prescribed content of C, and the molten steel temp. in all the tapping is maintained at >=1,600 deg.C for the purpose of continuous casting or ordinary ingot making in the next stage. By this method, the effective production of high carbon special steel in large sized oxygen refining furnaces which was heretofore difficult is made possible, and the steel kinds of small demand are produced in the same manner as for general carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5160581A JPS57164907A (en) | 1981-04-06 | 1981-04-06 | Production of steel having different contents of c from same molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5160581A JPS57164907A (en) | 1981-04-06 | 1981-04-06 | Production of steel having different contents of c from same molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57164907A true JPS57164907A (en) | 1982-10-09 |
Family
ID=12891530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5160581A Pending JPS57164907A (en) | 1981-04-06 | 1981-04-06 | Production of steel having different contents of c from same molten iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57164907A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594416A (en) * | 1979-01-13 | 1980-07-17 | Nippon Steel Corp | Weighed tapping method |
-
1981
- 1981-04-06 JP JP5160581A patent/JPS57164907A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594416A (en) * | 1979-01-13 | 1980-07-17 | Nippon Steel Corp | Weighed tapping method |
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