JPS569319A - Vacuum treatment controller for molten steel - Google Patents
Vacuum treatment controller for molten steelInfo
- Publication number
- JPS569319A JPS569319A JP8534279A JP8534279A JPS569319A JP S569319 A JPS569319 A JP S569319A JP 8534279 A JP8534279 A JP 8534279A JP 8534279 A JP8534279 A JP 8534279A JP S569319 A JPS569319 A JP S569319A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- vacuum
- content
- oxygen
- molten
- 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
-
- 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)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE: To decarburize molten steel to a target C value by automatically controlling the degree of vacuum in a vacuum treatment apparatus and the amount of oxygen to supply on the basis of the content of molten steel, both obtained by measurement of waste gas, specimen, in the decarburization treatment of the molten steel by vacuum degassing.
CONSTITUTION: In order to decarburize and refine a molten stainless steel, etc., under oxidation, in the vacuum treatment apparatus without oxidizing Cr, the ambient pressure of the apparatus 3 is lowered by the evacuator 1, the partial pressure of CO is lowered, and O2 gas from an O2 supplier is blown into the molten steel. In this case, the measured values of the flow meter 4 and the analyzer 6 for waste gas, provided in the waste gas path 4 of the appartus 3, are put in the arithmetical unit 7 to obtain the C content of the molten metal. On the basis of the measured value and the C amount-ambient pressure-oxygen amount relation stored in the memory 10, the vacuum regulator 8 and the O2 gas supply regulator 9 are automatically controlled properly by the control unit 11. Also,at the time when the C content is 0.02W0.06% larger than the target C value, the supply of oxygen is stopped and decarburization is performed by O2 present in the molten steel, the O2 content of the molten steel is reduced, and the consumption of Al of deoxidizer is saved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8534279A JPS569319A (en) | 1979-07-05 | 1979-07-05 | Vacuum treatment controller for molten steel |
DE19803025425 DE3025425C2 (en) | 1979-07-05 | 1980-07-04 | Method and device for controlling the vacuum degassing of a steel melt |
DD22241680A DD151965A5 (en) | 1979-07-05 | 1980-07-04 | METHOD AND DEVICE FOR CONTROLLING THE VACUUM GASIFICATION OF A STEEL MELT |
NL8003885A NL8003885A (en) | 1979-07-05 | 1980-07-04 | METHOD AND APPARATUS FOR CONTROLLING THE VACUUM DEGASSIFICATION OF MOLED STEEL. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8534279A JPS569319A (en) | 1979-07-05 | 1979-07-05 | Vacuum treatment controller for molten steel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS569319A true JPS569319A (en) | 1981-01-30 |
Family
ID=13855973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8534279A Pending JPS569319A (en) | 1979-07-05 | 1979-07-05 | Vacuum treatment controller for molten steel |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS569319A (en) |
DD (1) | DD151965A5 (en) |
DE (1) | DE3025425C2 (en) |
NL (1) | NL8003885A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62263916A (en) * | 1986-05-10 | 1987-11-16 | Sumitomo Metal Ind Ltd | Controlling method for carbon content of molten steel for vacuum refining furnace |
JPS634013A (en) * | 1986-06-23 | 1988-01-09 | Nisshin Steel Co Ltd | Decarburizing method for molten stainless steel |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6173817A (en) * | 1984-09-18 | 1986-04-16 | Sumitomo Electric Ind Ltd | Method and apparatus for control refining molten steel |
DE3706742A1 (en) * | 1987-02-28 | 1988-09-08 | Salzgitter Peine Stahlwerke | METHOD AND DEVICE FOR DEGASSING TREATMENT OF A STEEL MELT IN A VACUUM SYSTEM |
DE19540490C1 (en) * | 1995-10-23 | 1997-04-10 | Mannesmann Ag | Process for decarburizing a molten steel |
FR2835613B1 (en) * | 2002-02-06 | 2004-10-01 | Air Liquide | METHOD AND DEVICE FOR DETERMINING THE CONCENTRATION OF CARBON IN LIQUID STEEL |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4859017A (en) * | 1971-11-30 | 1973-08-18 | ||
JPS5181722A (en) * | 1975-01-16 | 1976-07-17 | Nippon Yakin Kogyo Co Ltd | YOKONOSHINKUSEIRENSEIGYOHOHO |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3594155A (en) * | 1968-10-30 | 1971-07-20 | Allegheny Ludlum Steel | Method for dynamically controlling decarburization of steel |
US3700429A (en) * | 1970-01-05 | 1972-10-24 | Allegheny Ludlum Steel | Method of controlling vacuum decarburization |
JPS5442324A (en) * | 1977-09-10 | 1979-04-04 | Nisshin Steel Co Ltd | Control procedure of steel making process using mass spectrometer |
-
1979
- 1979-07-05 JP JP8534279A patent/JPS569319A/en active Pending
-
1980
- 1980-07-04 NL NL8003885A patent/NL8003885A/en active Search and Examination
- 1980-07-04 DE DE19803025425 patent/DE3025425C2/en not_active Expired
- 1980-07-04 DD DD22241680A patent/DD151965A5/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4859017A (en) * | 1971-11-30 | 1973-08-18 | ||
JPS5181722A (en) * | 1975-01-16 | 1976-07-17 | Nippon Yakin Kogyo Co Ltd | YOKONOSHINKUSEIRENSEIGYOHOHO |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62263916A (en) * | 1986-05-10 | 1987-11-16 | Sumitomo Metal Ind Ltd | Controlling method for carbon content of molten steel for vacuum refining furnace |
JPS634013A (en) * | 1986-06-23 | 1988-01-09 | Nisshin Steel Co Ltd | Decarburizing method for molten stainless steel |
Also Published As
Publication number | Publication date |
---|---|
DE3025425A1 (en) | 1981-01-15 |
NL8003885A (en) | 1981-01-07 |
DE3025425C2 (en) | 1986-10-09 |
DD151965A5 (en) | 1981-11-11 |
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