GB1246736A - A process for making steel in induction crucible furnaces, and a furnace when used in the process - Google Patents

A process for making steel in induction crucible furnaces, and a furnace when used in the process

Info

Publication number
GB1246736A
GB1246736A GB54041/69A GB5404169A GB1246736A GB 1246736 A GB1246736 A GB 1246736A GB 54041/69 A GB54041/69 A GB 54041/69A GB 5404169 A GB5404169 A GB 5404169A GB 1246736 A GB1246736 A GB 1246736A
Authority
GB
United Kingdom
Prior art keywords
slag
bath
crucible
dome
added
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.)
Expired
Application number
GB54041/69A
Inventor
Heinz-Dieter Pantke
Ulrich Pohl
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.)
Huettenwerk Oberhausen AG
Original Assignee
Huettenwerk Oberhausen 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
Priority claimed from DE19681811703 external-priority patent/DE1811703C3/en
Application filed by Huettenwerk Oberhausen AG filed Critical Huettenwerk Oberhausen AG
Publication of GB1246736A publication Critical patent/GB1246736A/en
Expired 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H05B6/24—Crucible furnaces
    • 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
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (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)
  • General Induction Heating (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Paper (AREA)

Abstract

1,246,736. Making steel in an induction crucible. HUTTENWERK OBERHAUSEN A. G. Nov. 4, 1969 [Nov. 29, 1968], No. 54041/69. Heading C7D. A process for making steel in an induction crucible furnace having a cylindrical crucible surrounded by a cylindrical induction coil comprises maintaining the ratio of the induction coil input to the crucible contents at a value high enough to form a dome on the bath so elevated at the centre that the slag provided to absorb from the bath elements that are undesirable in the steel forms a toroidal vortex round it, which serves to drag below the slag surface charge materials introduced on to the dome. The preferred conditions are a specific power at 50 c/sec of at least 350 KW/tonne, and at other frequencies the quotient of the specific power input and the square root of the frequency is at least 49À5. The charge material may be low density material such as sponge iron in lump granular or powder form, the material being charged on the slag free dome of metal. The charge material may be added at a rate matching the power input to the coil at the time, so that the heat required to melt down the additions, form any fresh slag, and support the reactions, corresponds exactly to the heat being generated inductively in the bath. The carbon content of the bath may be regulated to less than 0À1% by weight. This may be achieved by oxidizing ore additions, by blowing with oxygen or by periodically adding a carburizing agent. A semi continuous method may be used wherein 40-50% of the contents are tapped in each cycle. Slag formers that promote de-phosphorization may be added with the sponge iron or after the tapping the first slag. Desulphurizing agents may also be added.
GB54041/69A 1968-11-29 1969-11-04 A process for making steel in induction crucible furnaces, and a furnace when used in the process Expired GB1246736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681811703 DE1811703C3 (en) 1968-11-29 Process for steel production in induction crucible furnaces

Publications (1)

Publication Number Publication Date
GB1246736A true GB1246736A (en) 1971-09-15

Family

ID=5714730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB54041/69A Expired GB1246736A (en) 1968-11-29 1969-11-04 A process for making steel in induction crucible furnaces, and a furnace when used in the process

Country Status (12)

Country Link
JP (1) JPS4938408B1 (en)
AT (1) AT313948B (en)
BE (1) BE741822A (en)
CH (1) CH506039A (en)
FR (1) FR2024490B1 (en)
GB (1) GB1246736A (en)
IL (1) IL33334A (en)
LU (1) LU59814A1 (en)
NL (1) NL6918045A (en)
NO (1) NO127016B (en)
SE (1) SE363511B (en)
ZA (1) ZA697771B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162156A (en) * 1977-05-02 1979-07-24 Advance Achievement Systems, Inc. Process for melting cast iron borings
BE1010710A3 (en) * 1996-10-24 1998-12-01 Centre Rech Metallurgique Method of producing steel from sponge iron.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2097344A (en) * 1932-12-06 1937-10-26 Heraeus Vacuumschmelze Ag Metallurgical slag reaction
GB821033A (en) * 1956-03-07 1959-09-30 Metallurg Oxygen Processes Ltd Improvements relating to the conversion of molten pig iron to steel

Also Published As

Publication number Publication date
CH506039A (en) 1971-04-15
NO127016B (en) 1973-04-24
NL6918045A (en) 1970-06-02
ZA697771B (en) 1971-07-28
FR2024490A1 (en) 1970-08-28
IL33334A (en) 1973-06-29
BE741822A (en) 1970-05-04
IL33334A0 (en) 1970-01-29
DE1811703B2 (en) 1973-12-13
DE1811703A1 (en) 1970-06-11
SE363511B (en) 1974-01-21
AT313948B (en) 1974-03-11
JPS4938408B1 (en) 1974-10-17
LU59814A1 (en) 1970-01-13
FR2024490B1 (en) 1973-11-16

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