JPS5773109A - Blowing method in top and bottom blown converter - Google Patents
Blowing method in top and bottom blown converterInfo
- Publication number
- JPS5773109A JPS5773109A JP14994380A JP14994380A JPS5773109A JP S5773109 A JPS5773109 A JP S5773109A JP 14994380 A JP14994380 A JP 14994380A JP 14994380 A JP14994380 A JP 14994380A JP S5773109 A JPS5773109 A JP S5773109A
- Authority
- JP
- Japan
- Prior art keywords
- blowing
- lance
- steel
- leading end
- 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.)
- Granted
Links
- 238000007664 blowing Methods 0.000 title abstract 11
- 238000000034 method Methods 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 abstract 6
- 239000010959 steel Substances 0.000 abstract 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000001301 oxygen Substances 0.000 abstract 3
- 229910052760 oxygen Inorganic materials 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
PURPOSE:To prevent sticking of molten steel owing to splashes at the leading end of a lance by setting the height of the top blowing lance at a specific value in association with the depth of a steel bath and the amt. of a bottom blowing gas in a desiliconization period in performing blowing work in a top and bottom blown converter. CONSTITUTION:In refining molten iron to steel by oxygen blowing in a top and bottom blown converter provided with a top blowing lance and a bottom blowing device, the intersurface space LH (m) between the leading end of the top blowing oxygen lance and the surface of the static bath of the molten metal in the converter is adjusted at the value shown by the equation [I]. In the equation, qoB is the amt. of a bottom blowing gas per unit weight of the molten steel (Nm<3>/min/ton) and HM is the depth (m) of the molten metal. This prevents the occurrence of operation failure by closing of the lance or difficulty in the removal of stuck steel pieces on account of sticking of the steel bath at the leading end of the top blowing lance by the spashes of the molten metal with the bottom blowing oxygen at the point of the time when the slag formation prior to ending of the desiliconization period is not completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994380A JPS5773109A (en) | 1980-10-25 | 1980-10-25 | Blowing method in top and bottom blown converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994380A JPS5773109A (en) | 1980-10-25 | 1980-10-25 | Blowing method in top and bottom blown converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5773109A true JPS5773109A (en) | 1982-05-07 |
| JPS6212281B2 JPS6212281B2 (en) | 1987-03-18 |
Family
ID=15485957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14994380A Granted JPS5773109A (en) | 1980-10-25 | 1980-10-25 | Blowing method in top and bottom blown converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5773109A (en) |
-
1980
- 1980-10-25 JP JP14994380A patent/JPS5773109A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6212281B2 (en) | 1987-03-18 |
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