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WO1998021374A3 - Method for treating steel in an electric arc furnace for obtaining a foamed slag - Google Patents

Method for treating steel in an electric arc furnace for obtaining a foamed slag Download PDF

Info

Publication number
WO1998021374A3
WO1998021374A3 PCT/FR1997/002041 FR9702041W WO9821374A3 WO 1998021374 A3 WO1998021374 A3 WO 1998021374A3 FR 9702041 W FR9702041 W FR 9702041W WO 9821374 A3 WO9821374 A3 WO 9821374A3
Authority
WO
WIPO (PCT)
Prior art keywords
electric arc
arc furnace
slag
obtaining
steel
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.)
Ceased
Application number
PCT/FR1997/002041
Other languages
French (fr)
Other versions
WO1998021374A2 (en
Inventor
Andre Poulalion
Casanove Jean-Pascal De
Claude Gentaz
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.)
Ferroglobe France SAS
Original Assignee
Pechiney Electrometallurgie SAS
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 Pechiney Electrometallurgie SAS filed Critical Pechiney Electrometallurgie SAS
Priority to EP97945920A priority Critical patent/EP1185715A2/en
Publication of WO1998021374A2 publication Critical patent/WO1998021374A2/en
Anticipated expiration legal-status Critical
Publication of WO1998021374A3 publication Critical patent/WO1998021374A3/en
Ceased 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
    • C21C5/54—Processes yielding slags of special composition
    • 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
    • C21C5/36—Processes yielding slags of special composition
    • C21C2005/366—Foam slags
    • 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
    • C21C2300/00—Process aspects
    • C21C2300/02—Foam creation
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (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)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention concerns a method for treating steel in an electric arc furnace for forming a foamed slag at the surface of the liquid steel, which consists in injecting into the slag or in its vicinity powder calcium carbide in an amount between 3 and 8 kg per ton of steel in the furnace. It enables the reduction of iron loss in the slag, in particular when the charge contains direct reduced iron, and the decrease of energy consumption.
PCT/FR1997/002041 1996-11-14 1997-11-13 Method for treating steel in an electric arc furnace for obtaining a foamed slag Ceased WO1998021374A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97945920A EP1185715A2 (en) 1996-11-14 1997-11-13 Method for treating steel in an electric arc furnace for obtaining a foamed slag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9614103A FR2755700B1 (en) 1996-11-14 1996-11-14 PROCESS FOR TREATING STEEL IN AN ELECTRIC ARC OVEN TO OBTAIN A FOAMED MILK
FR96/14103 1996-11-14

Publications (2)

Publication Number Publication Date
WO1998021374A2 WO1998021374A2 (en) 1998-05-22
WO1998021374A3 true WO1998021374A3 (en) 2001-11-08

Family

ID=9497774

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1997/002041 Ceased WO1998021374A2 (en) 1996-11-14 1997-11-13 Method for treating steel in an electric arc furnace for obtaining a foamed slag

Country Status (3)

Country Link
EP (1) EP1185715A2 (en)
FR (1) FR2755700B1 (en)
WO (1) WO1998021374A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108410535B (en) * 2018-04-17 2020-06-02 太原理工大学 Sludge microbubble-excited fuel and preparation method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911287B1 (en) * 1970-07-11 1974-03-15
JPS50113409A (en) * 1974-06-12 1975-09-05
US4447265A (en) * 1983-06-27 1984-05-08 Schwer John W Method and composition for foaming slag in electric arc furnace
US4528035A (en) * 1984-05-21 1985-07-09 Metro Materials Corporation Composition and process to create foaming slag cover for molten steel
DD238170A3 (en) * 1983-10-05 1986-08-13 Joachim Jansen METHOD FOR UTILIZING NON-METAL OXIDE RESIDUES FOR ALLOY PURPOSES
FR2634787A1 (en) * 1988-08-01 1990-02-02 Siderurgie Fse Inst Rech PROCESS FOR OBTAINING A FOAMING SLAG IN AN ELECTRIC STEEL FURNACE
EP0637634A1 (en) * 1993-08-04 1995-02-08 Voest-Alpine Industrieanlagenbau Gmbh Process for producing a metal melt
EP0655508A1 (en) * 1993-11-30 1995-05-31 ACCIAI SPECIALI TERNI S.p.a. Process for using foamed slag in stainless steel production in the electric arc furnace

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4911287B1 (en) * 1970-07-11 1974-03-15
JPS50113409A (en) * 1974-06-12 1975-09-05
US4447265A (en) * 1983-06-27 1984-05-08 Schwer John W Method and composition for foaming slag in electric arc furnace
DD238170A3 (en) * 1983-10-05 1986-08-13 Joachim Jansen METHOD FOR UTILIZING NON-METAL OXIDE RESIDUES FOR ALLOY PURPOSES
US4528035A (en) * 1984-05-21 1985-07-09 Metro Materials Corporation Composition and process to create foaming slag cover for molten steel
FR2634787A1 (en) * 1988-08-01 1990-02-02 Siderurgie Fse Inst Rech PROCESS FOR OBTAINING A FOAMING SLAG IN AN ELECTRIC STEEL FURNACE
EP0637634A1 (en) * 1993-08-04 1995-02-08 Voest-Alpine Industrieanlagenbau Gmbh Process for producing a metal melt
EP0655508A1 (en) * 1993-11-30 1995-05-31 ACCIAI SPECIALI TERNI S.p.a. Process for using foamed slag in stainless steel production in the electric arc furnace

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 84, no. 20, 17 May 1976, Columbus, Ohio, US; abstract no. 139293, SHIRAKI, TAKEO: "Oxygen removal from steels in electric-arc furnaces" XP002036132 *
CHEMICAL ABSTRACTS, vol. 88, no. 10, 6 March 1978, Columbus, Ohio, US; abstract no. 64642, ANIOLA-KUSIAK, ALEKSANDRA ET AL: "Melting of carbon steels and low-alloy steels in single-slag practice in an electric arc furnace" XP002036133 *
DATABASE WPI Section Ch Week 7415, Derwent World Patents Index; Class M24, AN 74-28062V, XP002036134 *
HUTNIK (1977), 44(5), 222-5 CODEN: HUTNAD, 1977 *
PING W ET AL: "ADVANCES IN EAF+LF(V) PROCESS IN CHINA", EUROPEAN ELECTRIC STEEL CONGRESS, 19 June 1995 (1995-06-19), pages 503 - 511, XP000618387 *

Also Published As

Publication number Publication date
FR2755700A1 (en) 1998-05-15
FR2755700B1 (en) 1998-12-18
WO1998021374A2 (en) 1998-05-22
EP1185715A2 (en) 2002-03-13

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