JPS55115913A - Pretreating method of molten iron - Google Patents
Pretreating method of molten ironInfo
- Publication number
- JPS55115913A JPS55115913A JP2301679A JP2301679A JPS55115913A JP S55115913 A JPS55115913 A JP S55115913A JP 2301679 A JP2301679 A JP 2301679A JP 2301679 A JP2301679 A JP 2301679A JP S55115913 A JPS55115913 A JP S55115913A
- Authority
- JP
- Japan
- Prior art keywords
- molten iron
- desiliconizing agent
- inert gas
- iron
- lance
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE: To let desiliconizing agent be dissolved only by the sensible heat of molten iron and cause desiliconization efficiently while suppressing decarbonization reaction by blowing the desiliconizing agent composed primariy of Fe2O3 together with inert gas to the limited depth under molten iron surface into the moten iron of the specific temperature.
CONSTITUTION: After blast-furnace molten iron is poured into a molten iron ladle 1, the temperature of the molten iron (a) is kept at 1200W1400°C. Next, a lance 2 is so inserted that the blow hole at its end comes to a depth of h (h≥2m) from the surface of molten iron (a). Thence, the fine granular desiliconizing agent (b) composed primarily of Fe2O3 forming acidic slag by dissolving by the sensible heat of the molten iron is blown through the lance 2 with inert gas (c) such as Ar or N2 as carrier gas and at the same time the molten iron (a) is stirred by the inert gas (c). Thereby, the desiliconizing agent is dissolved in a short time and the acidic slag is formed by the desiliconization reaction of the following formula, whereby the Si content in the molten iron (a) is reduced. Si+2/3Fe2O3→SiO2+4/3Fe.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2301679A JPS55115913A (en) | 1979-02-28 | 1979-02-28 | Pretreating method of molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2301679A JPS55115913A (en) | 1979-02-28 | 1979-02-28 | Pretreating method of molten iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55115913A true JPS55115913A (en) | 1980-09-06 |
| JPS6110528B2 JPS6110528B2 (en) | 1986-03-29 |
Family
ID=12098686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2301679A Granted JPS55115913A (en) | 1979-02-28 | 1979-02-28 | Pretreating method of molten iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55115913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827916A (en) * | 1981-08-12 | 1983-02-18 | Kawasaki Steel Corp | Desiliconizing method for molten iron |
-
1979
- 1979-02-28 JP JP2301679A patent/JPS55115913A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827916A (en) * | 1981-08-12 | 1983-02-18 | Kawasaki Steel Corp | Desiliconizing method for molten iron |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6110528B2 (en) | 1986-03-29 |
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