JPS5693812A - Bottom blown refining process for steel - Google Patents
Bottom blown refining process for steelInfo
- Publication number
- JPS5693812A JPS5693812A JP16967779A JP16967779A JPS5693812A JP S5693812 A JPS5693812 A JP S5693812A JP 16967779 A JP16967779 A JP 16967779A JP 16967779 A JP16967779 A JP 16967779A JP S5693812 A JPS5693812 A JP S5693812A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- tuyere
- steel
- blowing
- blown
- 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
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
Abstract
PURPOSE:To perform bottom blown refining of steel while ensuring to cool tuyere and not increasing hydrogen content in steel by a method wherein blow-use O2 gas, a material for producing gaseous powder, and carbon powder are blown, as gas body, from the gas blowing tuyere located at the lower part of hot steel of a blowing container. CONSTITUTION:In bottom blown refining of steel, blow-use O2 gas, a material for generating gaseous powder (e.g. CaCO3), and carbon powder are blown, as gas body, from the gas blowing tuyere located at the lower part of hot steel of a blowing container. In case a powder-generating material and carbon powder are blown from the outer tube, and blow-use O2 is blown from the inner gas, using a double pipe, separately from the above blow-use gas, then gas such as N2 or CO2 is used as a carrier gas when blowing. Thus, by blowing gas-generating material into a tuyere, heat absorption action occurs when the gas undergoes thermal decomposition and cools the tuyere. Furthermore, by mixing carbon powder, a heat-absorption reaction occurs at the tip end of the tuyere to increase the effect of cooling. As a result, the process provides excellent effects including the saving of hot metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16967779A JPS5693812A (en) | 1979-12-26 | 1979-12-26 | Bottom blown refining process for steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16967779A JPS5693812A (en) | 1979-12-26 | 1979-12-26 | Bottom blown refining process for steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5693812A true JPS5693812A (en) | 1981-07-29 |
Family
ID=15890852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16967779A Pending JPS5693812A (en) | 1979-12-26 | 1979-12-26 | Bottom blown refining process for steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5693812A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56163211A (en) * | 1980-05-16 | 1981-12-15 | Nippon Steel Corp | Steel making method |
-
1979
- 1979-12-26 JP JP16967779A patent/JPS5693812A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56163211A (en) * | 1980-05-16 | 1981-12-15 | Nippon Steel Corp | Steel making method |
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