JPS5594416A - Weighed tapping method - Google Patents
Weighed tapping methodInfo
- Publication number
- JPS5594416A JPS5594416A JP257179A JP257179A JPS5594416A JP S5594416 A JPS5594416 A JP S5594416A JP 257179 A JP257179 A JP 257179A JP 257179 A JP257179 A JP 257179A JP S5594416 A JPS5594416 A JP S5594416A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- making
- refining
- molten iron
- decarbonization
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To prevent the production of short ingots at the ingot making and improve the yield of ingot making by decarbonization-refining the molten iron which has beforehand been prerefined of Si, S, P in a steel making furnace and making the required amount of ingot then adding the prerefined molten iron to the remaining molten steel, decarbonization-refining the same to the target C grade and making its ingots. CONSTITUTION:Raw material molten iron for steel making is subjected to desiliconization, desulfurization and dephosphorization refining with Na2CO3, iron ore, oxygen, etc. by using a hermetic type groove type reaction vessel, whereby it is made to the molten iron of less Si, S and P. This molten iron is transferred into a steel making furnace such as converter, where it is subjected to decarbonization refining through oxygen top blowing refining until it becomes the target C grade, whereby it is made to steel. Of this, a fixed amount is weighed, is taken out and is made into ingots. In this case, it is only the decarbonization refining by oxygen and therefore slag is hardly produced. The molten iron having undergone prerefining is newly added into the molten steel remained in the converter and is decarbonization-refined to the steel of the target C grade, thence the required amount thereof is made into ingots. In this way, the steel may be taken out so as not to become odd in weight at the ingot making, the occurrence of short ingots is obviated and the yield of ingot making improves.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP257179A JPS5594416A (en) | 1979-01-13 | 1979-01-13 | Weighed tapping method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP257179A JPS5594416A (en) | 1979-01-13 | 1979-01-13 | Weighed tapping method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5594416A true JPS5594416A (en) | 1980-07-17 |
Family
ID=11533048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP257179A Pending JPS5594416A (en) | 1979-01-13 | 1979-01-13 | Weighed tapping method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5594416A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57164907A (en) * | 1981-04-06 | 1982-10-09 | Nippon Steel Corp | Production of steel having different contents of c from same molten iron |
FR2558482A1 (en) * | 1984-01-25 | 1985-07-26 | Siderurgie Fse Inst Rech | Process for the production of steel by prerefining pig iron |
-
1979
- 1979-01-13 JP JP257179A patent/JPS5594416A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57164907A (en) * | 1981-04-06 | 1982-10-09 | Nippon Steel Corp | Production of steel having different contents of c from same molten iron |
FR2558482A1 (en) * | 1984-01-25 | 1985-07-26 | Siderurgie Fse Inst Rech | Process for the production of steel by prerefining pig iron |
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