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FR2358464A1 - Removing inclusions from molten steel - using argon to inject fine slag powder, possibly together with an agent removing sulphur - Google Patents

Removing inclusions from molten steel - using argon to inject fine slag powder, possibly together with an agent removing sulphur

Info

Publication number
FR2358464A1
FR2358464A1 FR7717409A FR7717409A FR2358464A1 FR 2358464 A1 FR2358464 A1 FR 2358464A1 FR 7717409 A FR7717409 A FR 7717409A FR 7717409 A FR7717409 A FR 7717409A FR 2358464 A1 FR2358464 A1 FR 2358464A1
Authority
FR
France
Prior art keywords
mixt
molten steel
pref
steel
sulphur
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.)
Withdrawn
Application number
FR7717409A
Other languages
French (fr)
Inventor
Hans Kosmider
Horst Abratis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kloeckner Werke AG filed Critical Kloeckner Werke AG
Publication of FR2358464A1 publication Critical patent/FR2358464A1/en
Withdrawn legal-status Critical Current

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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/076—Use of slags or fluxes as treating agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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)

Abstract

The sulphide and oxide contents of molten steel are reduced, where the steel has been deoxidised and/or treated with an agent to remove sulphur. After deoxidn. and/or desulphurisation, the fine suspended particles in the melt are coagulatd and removed by blowing a mineral mixt. of CaO, SiO2 and Al2O3 into the molten steel. The mineral mixt. may also contain MgO and pref. has a m.pt. of 1300-1400 degrees C.; it should only have a low content of iron and manganese oxides. The mixt. is pref. made by melting the constituents, then solidifying and milling to max. size 0.5 mm. Pref. 0.75-2.5 kg of the mixt. is used per tonne of steel, the pref. mixt. contg. 42% CaO, 35% SiO2, 11.5% Al2O3, balance MgO and 3-4% of other constituents. The mixt. is neutral, and coagulates the fine inclusions without detriment to the quality of the steel. The operation can be conducted in a ladle in 4-12 minuts and combined with sulphur removal.
FR7717409A 1976-07-13 1977-06-07 Removing inclusions from molten steel - using argon to inject fine slag powder, possibly together with an agent removing sulphur Withdrawn FR2358464A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762631368 DE2631368B1 (en) 1976-07-13 1976-07-13 PROCESS FOR IMPROVING THE SULFIDIC AND OXYDIC LEVEL OF PURITY OF DESOXIDIZED AND / OR DESULFURIZED STEEL MELT

Publications (1)

Publication Number Publication Date
FR2358464A1 true FR2358464A1 (en) 1978-02-10

Family

ID=5982844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7717409A Withdrawn FR2358464A1 (en) 1976-07-13 1977-06-07 Removing inclusions from molten steel - using argon to inject fine slag powder, possibly together with an agent removing sulphur

Country Status (8)

Country Link
JP (1) JPS539216A (en)
AU (1) AU2657977A (en)
BE (1) BE856734A (en)
DE (1) DE2631368B1 (en)
FR (1) FR2358464A1 (en)
IT (1) IT1076098B (en)
LU (1) LU77734A1 (en)
NL (1) NL7704992A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942405A1 (en) * 1989-12-21 1991-06-27 Krupp Polysius Ag METHOD AND CONVEYOR FOR BLOWING IN POWDER-SHAPED TREATMENT AGAINST RAW IRON AND STEEL MELTS

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405363A (en) * 1982-04-12 1983-09-20 Scandinavian Lancers Aktiebolag Method for refining of steel melts
CN114890803A (en) * 2022-05-30 2022-08-12 武汉科技大学 A kind of preparation method of superoxide radical-containing high temperature oxide melt

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408685A (en) * 1964-09-24 1965-08-13 Suedwestfalen Ag Stahlwerke Process for the production of steel ingots
FR2217424A1 (en) * 1973-02-15 1974-09-06 Uddeholms Ab
DE2352514A1 (en) * 1973-10-19 1975-04-30 Hoesch Werke Ag Refining continuously cast steel with aluminium - prevention of aluminium oxide inclusions by addition of an oxide powder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125479B2 (en) * 1971-09-08 1976-07-31
BE791197A (en) * 1971-11-11 1973-03-01 Steetley Mfg Ltd CASTINE COMPOSITIONS
JPS49328U (en) * 1972-04-04 1974-01-05
JPS5085513A (en) * 1973-12-05 1975-07-10

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408685A (en) * 1964-09-24 1965-08-13 Suedwestfalen Ag Stahlwerke Process for the production of steel ingots
FR2217424A1 (en) * 1973-02-15 1974-09-06 Uddeholms Ab
DE2352514A1 (en) * 1973-10-19 1975-04-30 Hoesch Werke Ag Refining continuously cast steel with aluminium - prevention of aluminium oxide inclusions by addition of an oxide powder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942405A1 (en) * 1989-12-21 1991-06-27 Krupp Polysius Ag METHOD AND CONVEYOR FOR BLOWING IN POWDER-SHAPED TREATMENT AGAINST RAW IRON AND STEEL MELTS

Also Published As

Publication number Publication date
NL7704992A (en) 1978-01-17
BE856734A (en) 1977-10-31
IT1076098B (en) 1985-04-22
DE2631368B1 (en) 1977-11-10
AU2657977A (en) 1979-01-04
JPS539216A (en) 1978-01-27
LU77734A1 (en) 1977-10-14

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Legal Events

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