JPS5741306A - Dephosphorization method of molten iron - Google Patents
Dephosphorization method of molten ironInfo
- Publication number
- JPS5741306A JPS5741306A JP11796980A JP11796980A JPS5741306A JP S5741306 A JPS5741306 A JP S5741306A JP 11796980 A JP11796980 A JP 11796980A JP 11796980 A JP11796980 A JP 11796980A JP S5741306 A JPS5741306 A JP S5741306A
- Authority
- JP
- Japan
- Prior art keywords
- molten iron
- gaseous
- na2co3
- contg
- cracking
- 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
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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE:To obtain high dephosphorization effect by a small amount of Na2CO3 by dephosphorizing molten iron by using flux consisting essentially of Na2CO3 in the stage of maintaining the increased partial pressure of the gaseous CO to be blown into the molten iron. CONSTITUTION:In adding flux consisting essentially of Na2CO3 into molten iron, gaseous CO or a gas contg. gaseous CO is blown into the molten iron through the bottom tuyere of, for example, a reactor contg. the molten iron, and the molten iron is thoroughly stirred. For example, waste gases of converters are usable as the CO- contg. gas. The enrichment of the partial pressure of the gaseous CO in the molten iron is caused by the blowing of the gaseous CO, and the eventual decarburization reaction is suppressed. Hence, the greater part of the CO2 produced by cracking of the Na2CO3 is used for the formation of P2O5 without being used for decarburization reaction. The Na2O and P2O5 which are the other products of cracking of the Na2CO2 existing near the P2O5 are caused to react effectively to allow Na3PO4 to form which is fixed in slag, whereby dephosphorization is quickly progressed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11796980A JPS5741306A (en) | 1980-08-27 | 1980-08-27 | Dephosphorization method of molten iron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11796980A JPS5741306A (en) | 1980-08-27 | 1980-08-27 | Dephosphorization method of molten iron |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5741306A true JPS5741306A (en) | 1982-03-08 |
JPS5755762B2 JPS5755762B2 (en) | 1982-11-26 |
Family
ID=14724751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11796980A Granted JPS5741306A (en) | 1980-08-27 | 1980-08-27 | Dephosphorization method of molten iron |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5741306A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63144435U (en) * | 1987-03-12 | 1988-09-22 |
-
1980
- 1980-08-27 JP JP11796980A patent/JPS5741306A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5755762B2 (en) | 1982-11-26 |
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