JPS5743916A - Method for preventing outflow of slag at tapping of refined steel from converter - Google Patents
Method for preventing outflow of slag at tapping of refined steel from converterInfo
- Publication number
- JPS5743916A JPS5743916A JP11774080A JP11774080A JPS5743916A JP S5743916 A JPS5743916 A JP S5743916A JP 11774080 A JP11774080 A JP 11774080A JP 11774080 A JP11774080 A JP 11774080A JP S5743916 A JPS5743916 A JP S5743916A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- slag
- converter
- tapping
- taphole
- 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
- C21C5/4653—Tapholes; Opening or plugging thereof
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To effectively prevent a slag from flowing out downwardly by a method wherein the atmosphere in a converter is sealed and decompressed in a steel tapping operation, particularly at the final stage of the tapping operation, so as to regulate the flow velocity of the molten steel at a taphole wherein the velocity is determined by the thickness of the slag layer, the depth of the molten steel and the difference between the pressure of the furnace atmosphere and the ambient pressure. CONSTITUTION:During when the tapping process for tapping the molten steel from the converter through the taphole 10 by tilting the furnace body 1 is progressing, and particularly at the final stage of the process, a furnace port 3 is closed. Then the residual amount of the molten steel m in the converter is decreased, and immediately before the depth of the molten steel m becomes such that the vortex generated by the flow of the molten steel m at the taphole 10 rolls in the slag s, the opening of a regulating valve 8 is gradually enlarged. And by communicating the interior of the furnace body 1 to a vacuum tank 6, the internal pressure of the furnace body 1 is controlled to regulate the flow velocity of the molten steel so that the generation of the vortex is inhibited. Consequently, mixing of the slag s is effectively prevented from mixing into the molten steel m to flow into a ladle 9 together with the steel m. After the selective outflow of the molten steel m is completed, the valve 8 is fully opened to further reduce the pressure in the converter rapidly, thereby preventing the slag s from flowing out via the taphole 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11774080A JPS5743916A (en) | 1980-08-28 | 1980-08-28 | Method for preventing outflow of slag at tapping of refined steel from converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11774080A JPS5743916A (en) | 1980-08-28 | 1980-08-28 | Method for preventing outflow of slag at tapping of refined steel from converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5743916A true JPS5743916A (en) | 1982-03-12 |
Family
ID=14719120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11774080A Pending JPS5743916A (en) | 1980-08-28 | 1980-08-28 | Method for preventing outflow of slag at tapping of refined steel from converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5743916A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01198794A (en) * | 1987-10-07 | 1989-08-10 | Casio Comput Co Ltd | Electronic stringed instrument |
| JPH01200399A (en) * | 1988-02-05 | 1989-08-11 | Casio Comput Co Ltd | Electronic stringed instrument |
| JPH01310396A (en) * | 1988-06-09 | 1989-12-14 | Roland Corp | Electronic percussion instrument |
-
1980
- 1980-08-28 JP JP11774080A patent/JPS5743916A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01198794A (en) * | 1987-10-07 | 1989-08-10 | Casio Comput Co Ltd | Electronic stringed instrument |
| JPH01200399A (en) * | 1988-02-05 | 1989-08-11 | Casio Comput Co Ltd | Electronic stringed instrument |
| JPH01310396A (en) * | 1988-06-09 | 1989-12-14 | Roland Corp | Electronic percussion instrument |
| JP2614746B2 (en) * | 1988-06-09 | 1997-05-28 | ローランド株式会社 | Electronic percussion instrument |
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