JPS55107718A - Production of molten steel - Google Patents
Production of molten steelInfo
- Publication number
- JPS55107718A JPS55107718A JP1504179A JP1504179A JPS55107718A JP S55107718 A JPS55107718 A JP S55107718A JP 1504179 A JP1504179 A JP 1504179A JP 1504179 A JP1504179 A JP 1504179A JP S55107718 A JPS55107718 A JP S55107718A
- Authority
- JP
- Japan
- Prior art keywords
- added
- molten
- vacuum degassing
- vessel
- iron
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 10
- 229910052742 iron Inorganic materials 0.000 abstract 5
- 238000009849 vacuum degassing Methods 0.000 abstract 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 3
- 229910001882 dioxygen Inorganic materials 0.000 abstract 3
- 239000002893 slag Substances 0.000 abstract 3
- 230000003009 desulfurizing effect Effects 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 229910014810 CaCl2—CaF2 Inorganic materials 0.000 abstract 1
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000006356 dehydrogenation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000003756 stirring Methods 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE:To produce steel with less heat losses and superior productivity by desiliconizing, desulfurizing, dephosphorizing and decarbonizing molten iron in a vacuum degassing vessel then further deoxidating and dehydrogenating the same through vacuum degassing treatment. CONSTITUTION:Molten iron is sucked up into a vacuum degassing vessel, where it is added with scale, iron ore, oxygen gas, etc. and is reciprocated between the pan and vacuum vessel to stir, whereby the Si contained therein is first oxidized and turned to slag. The SiO2-base molten slag formed at this time is discharged to outside the pan. Next, desulfurizing and dephosphorizing flux of CaO-CaCl2-CaF2 base is added to the molten metal in the vacuum vessel and oxygen gas or scale is added, thence the molten iron is stirred in the same manner as above, whereby it is desulfurized and dephosphorized. Next, the slag formed is removed to prevent the occurrence of resulfurization and rephosphorization, after which new flux is added and oxygen gas and cooling material are suitably added to oxidation-decarbonize the C in the molten metal, whereby the molten iron is refined to steel. Finally, it is subjected to deoxidation and dehydrogenation by the vacuum degassing vessel, then to component-control with iron alloy, etc., whereby the steel of the target quality is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504179A JPS55107718A (en) | 1979-02-14 | 1979-02-14 | Production of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504179A JPS55107718A (en) | 1979-02-14 | 1979-02-14 | Production of molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55107718A true JPS55107718A (en) | 1980-08-19 |
Family
ID=11877748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1504179A Pending JPS55107718A (en) | 1979-02-14 | 1979-02-14 | Production of molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55107718A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068442A1 (en) * | 1999-05-07 | 2000-11-16 | Sidmar N.V. | Method of decarburisation and dephosphorisation of a molten metal |
| EP1428894A1 (en) * | 2002-12-13 | 2004-06-16 | SMS Mevac GmbH | A method of degassing molten steel |
-
1979
- 1979-02-14 JP JP1504179A patent/JPS55107718A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068442A1 (en) * | 1999-05-07 | 2000-11-16 | Sidmar N.V. | Method of decarburisation and dephosphorisation of a molten metal |
| EP1428894A1 (en) * | 2002-12-13 | 2004-06-16 | SMS Mevac GmbH | A method of degassing molten steel |
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