JPS5582709A - Treating method for molten cast iron - Google Patents
Treating method for molten cast ironInfo
- Publication number
- JPS5582709A JPS5582709A JP15476978A JP15476978A JPS5582709A JP S5582709 A JPS5582709 A JP S5582709A JP 15476978 A JP15476978 A JP 15476978A JP 15476978 A JP15476978 A JP 15476978A JP S5582709 A JPS5582709 A JP S5582709A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- molten
- slag
- contained
- cao
- 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
-
- 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
- C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
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 desulfurize and to dephosphorize cast iron with the same refining agent, by desulfurizing the desiliconized cast iron with a refining agent composed of CaO, CaCl2, KCl, etc., then by increasing the oxidizing power of the molten slag. CONSTITUTION:Molten cast iron is primarily desiliconized to 0.03-0.25% Si. Then 2-10kg refining agent composed of 1pts. wt. CaO, 0.2-0.5pts. wt. chloride, e.g., CaCl2 or KCl is added to 1 ton cast iron to form basic slag. The mixt. is agitated sufficiently by gas-bubbling to remove 70% of S contained in the molten cast iron into the above-described molten slag. Subsequently, an oxygen source such as oxygen gas, mill scale etc. is added so as to increase FeO content of the molten slag, and to oxidize P in the cast iron to P2O5. Hereby, S contained in the molten slag is oxidized and removed by the oxidation heat of Si contained in the molten cast iron, i.e., the cast iron is subjected to evaporation dusulfurization, preventing resulfurization which otherwise would be caused by the increase in acidity of the molten slag. P2O5 is fixed to the slag with CaO contained in the basic slag, thus the cast iron is dephosphorized.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15476978A JPS5582709A (en) | 1978-12-15 | 1978-12-15 | Treating method for molten cast iron |
| US06/085,255 US4295882A (en) | 1978-10-24 | 1979-10-16 | Steel making process |
| CA000338106A CA1136421A (en) | 1978-10-24 | 1979-10-22 | Steelmaking process |
| BR7906836A BR7906836A (en) | 1978-10-24 | 1979-10-23 | STEEL MANUFACTURING PROCESS |
| DE2942779A DE2942779C2 (en) | 1978-10-24 | 1979-10-23 | Process for the production of steel |
| GB7936945A GB2045281B (en) | 1978-10-24 | 1979-10-24 | Multi stage conversion of crude iron to steel with minimised slag production |
| FR7926431A FR2439821A1 (en) | 1978-10-24 | 1979-10-24 | PROCESS FOR THE MANUFACTURE OF STEEL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15476978A JPS5582709A (en) | 1978-12-15 | 1978-12-15 | Treating method for molten cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5582709A true JPS5582709A (en) | 1980-06-21 |
| JPS5711370B2 JPS5711370B2 (en) | 1982-03-04 |
Family
ID=15591482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15476978A Granted JPS5582709A (en) | 1978-10-24 | 1978-12-15 | Treating method for molten cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5582709A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59125662U (en) * | 1983-02-14 | 1984-08-24 | トヨタ自動車株式会社 | ball valve |
-
1978
- 1978-12-15 JP JP15476978A patent/JPS5582709A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5711370B2 (en) | 1982-03-04 |
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