DE19608532A1 - Cooling the electrodes in an arc furnace during steel production - Google Patents

Cooling the electrodes in an arc furnace during steel production

Info

Publication number
DE19608532A1
DE19608532A1 DE19608532A DE19608532A DE19608532A1 DE 19608532 A1 DE19608532 A1 DE 19608532A1 DE 19608532 A DE19608532 A DE 19608532A DE 19608532 A DE19608532 A DE 19608532A DE 19608532 A1 DE19608532 A1 DE 19608532A1
Authority
DE
Germany
Prior art keywords
electrodes
cooling
arc furnace
liquid
furnace
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Withdrawn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
DE19608532A
Other languages
German (de)
Inventor
Heinz Smegal
Lothar Finck
Hernanto Wiryomijoyo
Fazwar Bujang
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.)
EISENBAU ESSEN GmbH
Original Assignee
EISENBAU ESSEN GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7784908&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE19608532(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EISENBAU ESSEN GmbH filed Critical EISENBAU ESSEN GmbH
Priority to DE19608532A priority Critical patent/DE19608532A1/en
Publication of DE19608532A1 publication Critical patent/DE19608532A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • C21C5/32—Blowing from above
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • 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
    • 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
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • 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
    • C21C7/0081—Treating and handling under pressure
    • 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
    • C21C7/072—Treatment with gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0026—Introducing additives into the melt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • 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)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (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)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

A process for cooling one or more electrodes in an arc furnace during the production of steel comprises spraying or sprinkling the electrode(s) with cooled liquid CO2 as coolant.

Description

Die Erfindung betrifft ein Verfahren zum Kühlen einer oder mehrerer Elektroden in einem Lichtbogenofen, im Zuge der Stahlerzeugung, wonach die Elektroden mit einem Kühlmedium beaufschlagt werden.The invention relates to a method for cooling one or several electrodes in an arc furnace, in the course of Steel production, after which the electrodes with a cooling medium be charged.

Es ist bekannt, die Elektroden eines Lichtbogenofens mit einer offenen Sprüh-Wasserkühlung zu beaufschlagen, um den Elektrodenverbrauch in Grenzen zu halten. Das Kühlwasser läuft filmartig an den Elektroden herab und verdampft im Ofenraum unter Bildung von Wasserdampf. Dieser Wasserdampf erzeugt erhebliche Turbulenzen in der Ofenathmosphäre und im Lichtbogenbereich in direktem Kontakt mit dem flüssigen Stahlbad. Dabei werden Teile des Wasserdampfes in H₂ und 1/2 O₂ zerlegt. Das 1/2 O₂ reduziert die C-enthaltene Stahlschmelze, so daß CO entsteht. Das H₂ gelangt in den flüssigen Stahl, da es hierin in hohem Maße löslich ist. Jedoch diffundiert das H₂ nach einiger Auslagerungszeit aus dem erkaltetem Stahl aus. Problematisch ist die Eigenschaft des gelösten H₂, daß es das Warm-Sprödbrüchig­ keitsverhalten des Stahls negativ beeinflußt. So können beispielsweise bei einem Stranggußprozeß Oberflächenrisse auftreten, und zwar bevorzugt an den Kanten des abge­ gossenen Stahlstranges. Diese Oberflächenrisse müssen ent­ weder im Zuge einer Nachbearbeitung mittels Handflämmung entfernt werden, oder aber der fragliche Bereich muß thermisch im Wege einer maschinellen Nachbearbeitung abgearbeitet werden. In beiden Fällen sind ein erheblicher Arbeitsaufwand, ein Mengenverlust und zusätzlicher Energiebedarf die Folge. Bisweilen muß auch eine Qualitätsminderung durch Doppelungen innerhalb des gewalzten Fertigproduktes (z. B. Bleche) in Kauf genommen werden. - Hier will die Erfindung Abhilfe schaffen.It is known to use the electrodes of an arc furnace an open spray water cooling to the Keep electrode consumption within limits. The cooling water runs down the electrodes like a film and evaporates in the Oven chamber with the formation of water vapor. That water vapor creates significant turbulence in the furnace atmosphere and in the arc area in direct contact with the liquid Steel bath. Parts of the water vapor in H₂ and 1/2 O₂ disassembled. The 1/2 O₂ reduces the C content Steel melt, so that CO is formed. The H₂ gets into the liquid steel because it is highly soluble in it. However, the H₂ diffuses after some aging time from the cooled steel. It is problematic Property of the dissolved H₂ that it is brittle when warm behavior of the steel is negatively affected. So can surface cracks, for example, in a continuous casting process occur, preferably at the edges of the abge cast steel strand. These surface cracks must be removed neither in the course of post-processing by hand flaming removed, or the area in question must be removed thermally by machine post-processing be processed. In both cases, there is a significant one Labor, loss of quantity and additional  The result is energy consumption. Sometimes one has to Reduction in quality due to duplications within the rolled finished product (e.g. sheets) accepted will. - The invention seeks to remedy this.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, nach dem sich die Elektroden von Lichtbogenöfen in rationeller und wirtschaftlicher Weise zur Reduzierung des Elektrodenverbrauchs kühlen lassen.The invention has for its object a method specify after which the electrodes of arc furnaces in a rational and economical way to reduce allow the electrode consumption to cool.

Diese Aufgabe löst die Erfindung bei einem gattungsgemäßen Verfahren dadurch, daß die Elektroden mit gekühltem Flüssig-CO₂ als Kühlmedium beaufschlagt werden. - Diese Maßnahmen haben zur Folge, daß zunächst einmal eine äußerst wirksame Kühlung der Elektroden erreicht wird. Hinzu kommt, daß die in dem Lichtbogenofen verdampfende CO₂-Flüssigkeit einen wirksamen Strahlenschutz darstellt, welcher die Ofenathmosphäre gleichsam als Wärmeisolierung benutzt. Von besonderer Bedeutung ist die Tatsache, daß das entstehende CO₂-Gas für die Stahlschmelze über­ raschenderweise nicht schädlich ist, so daß die Neigung zum Warm-Sprödbrüchigkeitsverhalten nicht länger negativ beeinflußt wird und folglich auch nicht die daraus resultierenden Nachteile auftreten können. Folglich ent­ fallen der sonst erforderliche Arbeitsmehraufwand, Mengen­ verlust und zusätzlicher Energiebedarf ohne daß Qualitäts­ minderungen zu verzeichnen sind. - Im einzelnen können die Elektroden mit dem gekühlten Flüssig-CO₂ besprüht oder berieselt werden. Vorzugsweise werden die Elektroden von ihrer Einspannstelle aus in Elektrodenlängsrichtung mit Flüssig-CO₂ besprüht oder berieselt.The invention solves this problem with a generic one Method in that the electrodes with cooled Liquid CO₂ can be applied as a cooling medium. - This Measures have the consequence that initially a extremely effective cooling of the electrodes is achieved. In addition, the evaporating in the arc furnace CO₂ liquid represents effective radiation protection, which, as it were, the furnace atmosphere as thermal insulation used. Of particular importance is the fact that the resulting CO₂ gas for the molten steel is surprisingly not harmful, so the inclination no longer negative for warm brittleness behavior is influenced and consequently not from it resulting disadvantages can occur. Hence ent fall the additional work required, quantities loss and additional energy consumption without quality reductions have been recorded. - In detail can sprayed the electrodes with the cooled liquid CO₂ or be sprinkled. Preferably the electrodes  from its clamping point in the longitudinal direction of the electrodes sprayed or sprinkled with liquid CO₂.

Gegenstand der Erfindung ist auch ein Lichtbogenofen zur Durchführung des beanspruchten Verfahrens, mit einer oder mehreren oberhalb des Ofendeckels angeordneten Einspann­ vorrichtungen für eine oder mehrere durch den Ofendeckel hindurch geführte Elektroden. Zur Verwirklichung einer einfachen und funktionsgerechten Bauweise, um die bean­ spruchte Elektroden-Kühlung zu erreichen, lehrt die Erfin­ dung, daß im Bereich der Einspannvorrichtungen die Elektroden umgebende Sprühvorrichtungen, z. B. Sprühringe mit Sprühdüsen, oder Berieselungsvorrichtungen, z. B. Berieselungsringe mit Berieselungsöffnungen, angeordnet sind, wobei die Sprühdüsen bzw. Berieselungsöffnungen gegen die Elektroden gerichtet ist. Dadurch wird eine einwandfreie Benetzung der zu kühlenden Elektroden mit dem Flüssig-CO₂ erreicht.The invention also relates to an arc furnace Implementation of the claimed method, with an or several clamps arranged above the furnace cover devices for one or more through the furnace lid electrodes passed through. To achieve one simple and functional design to meet the bean Erfin teaches how to achieve electrode cooling that in the area of the clamping devices Spray devices surrounding electrodes, e.g. B. Spray rings with spray nozzles, or sprinklers, e.g. B. Sprinkler rings with sprinkler openings, arranged are, the spray nozzles or sprinkler openings is directed against the electrodes. This will make one perfect wetting of the electrodes to be cooled with the Liquid CO₂ reached.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Die einzige Figur zeigt in schematischer Darstellung und ausschnittsweise
einen Lichtbogenofen 1 mit einer oberhalb des Ofendeckels 2 angeordneten Einspannvorrichtung 3 für einen durch den Ofendeckel 2 hindurchgeführte Elektrode 4. Im Bereich der Einspannvorrichtung 3 ist als Sprühvorrichtung ein Sprüh­ ring 5 mit Sprühdüsen angeordnet, um gekühltes Flüssig-CO₂ rundum gegen die Elektrode 4 zu sprühen an welcher das Flüssig-CO₂ bis zum Eintritt in den Ofenraum filmartig abläuft. Die Bildung von CO₂-Gas im Ofenraum ist ebenso schematisch angedeutet wie der Lichtbogen 6, die Stahl­ schmelze 7 und die sich auf der Stahlschmelze befindende Schlacke 8.In the following, the invention will be explained in more detail with reference to a drawing showing only one embodiment. The single figure shows a schematic representation and sections
an arc furnace 1 with a clamping device 3 arranged above the furnace cover 2 for an electrode 4 passed through the furnace cover 2 . In the area of the clamping device 3 , a spray ring 5 with spray nozzles is arranged as a spraying device in order to spray cooled liquid CO₂ all around against the electrode 4 , at which the liquid CO₂ runs like a film until it enters the furnace chamber. The formation of CO₂ gas in the furnace chamber is indicated schematically as well as the arc 6 , the steel melt 7 and the slag 8 located on the steel melt.

Claims (4)

1. Verfahren zum Kühlen einer oder mehrerer Elektroden in einem Lichtbogenofen, im Zuge der Stahlerzeugung, wonach die Elektroden mit einem Kühlmedium beaufschlagt werden, dadurch gekennzeichnet, daß die Elektroden mit gekühltem Flüssig-CO₂ als Kühlmedium beauf­ schlagt werden.1. A method for cooling one or more electrodes in an electric arc furnace, in the course of steelmaking, after which the electrodes are acted upon with a cooling medium, characterized in that the electrodes are struck with cooled liquid CO₂ as the cooling medium. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Elektroden mit Flüssig-CO₂ besprüht oder berieselt werden.2. The method according to claim 1, characterized in that sprayed or sprinkled the electrodes with liquid CO₂ will. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekenn­ zeichnet, daß die Elektroden von ihrer Einspannstelle aus in Elektrodenlängsrichtung mit Flüssig-CO₂ besprüht oder berieselt werden.3. The method according to claim 1 or 2, characterized records that the electrodes from their clamping point sprayed in the longitudinal direction with liquid CO₂ or be exposed to a constant stream. 4. Lichtbogenofen zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3, mit einer oder mehreren ober­ halb des Ofendeckels angeordneten Einspannvorrichtungen für eine oder mehrere durch den Ofendeckel hindurch geführte Elektroden, dadurch gekennzeichnet, daß im Bereich der Einspannvorrichtung(en) (3) die Elektroden (4) umgebende Sprühvorrichtungen, z. B. Sprühringe (5) mit Sprühdüsen, oder Berieselungsvorrichtungen, z. B. Beriese­ lungsringe mit Berieselungsöffnungen, angeordnet sind.4. Arc furnace for performing the method according to one of claims 1 to 3, with one or more upper half of the furnace cover arranged clamping devices for one or more electrodes passed through the furnace cover, characterized in that in the region of the clamping device (s) ( 3 ) spray devices surrounding the electrodes ( 4 ), e.g. B. spray rings ( 5 ) with spray nozzles, or sprinklers, z. B. Beriese lungsrings with sprinkler openings are arranged.
DE19608532A 1996-02-09 1996-03-06 Cooling the electrodes in an arc furnace during steel production Withdrawn DE19608532A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19608532A DE19608532A1 (en) 1996-02-09 1996-03-06 Cooling the electrodes in an arc furnace during steel production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604663 1996-02-09
DE19608532A DE19608532A1 (en) 1996-02-09 1996-03-06 Cooling the electrodes in an arc furnace during steel production

Publications (1)

Publication Number Publication Date
DE19608532A1 true DE19608532A1 (en) 1997-08-14

Family

ID=7784908

Family Applications (3)

Application Number Title Priority Date Filing Date
DE19608530A Expired - Fee Related DE19608530C2 (en) 1996-02-09 1996-03-06 Use of pure CO¶2¶ gas or a gas essentially containing CO¶2¶ as a carrier gas in the treatment of steel in an electric arc furnace
DE19608532A Withdrawn DE19608532A1 (en) 1996-02-09 1996-03-06 Cooling the electrodes in an arc furnace during steel production
DE19608531A Revoked DE19608531C2 (en) 1996-02-09 1996-03-06 Process for the treatment of steel, in particular for refining steel for the production of steel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19608530A Expired - Fee Related DE19608530C2 (en) 1996-02-09 1996-03-06 Use of pure CO¶2¶ gas or a gas essentially containing CO¶2¶ as a carrier gas in the treatment of steel in an electric arc furnace

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE19608531A Revoked DE19608531C2 (en) 1996-02-09 1996-03-06 Process for the treatment of steel, in particular for refining steel for the production of steel

Country Status (1)

Country Link
DE (3) DE19608530C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998043030A1 (en) * 1997-03-25 1998-10-01 Acciai Speciali Terni S.P.A. Device to protect graphite electrodes in an electric arc furnace
US10694592B1 (en) 2018-10-15 2020-06-23 Chemtreat, Inc. Methods of protecting furnace electrodes with cooling liquid that contains an additive
US11979968B2 (en) 2018-10-15 2024-05-07 Chemtreat, Inc. Spray cooling furnace electrodes with a cooling liquid that contains surfactants

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2260816C (en) 1995-05-04 2009-01-06 Georg Schmidt Process for removing nox from nitrosylsulphuric acid
DE19744151C5 (en) * 1997-10-07 2004-08-26 Outokumpu Oyj Process for melting fine-grained, directly reduced iron in an electric arc furnace
AT407752B (en) 1999-04-22 2001-06-25 Voest Alpine Ind Anlagen METHOD AND DEVICE FOR MELTING METAL MATERIAL
NO310728B1 (en) * 1999-09-24 2001-08-20 Norsk Hydro As Procedure and equipment for foaming
DE10207202B9 (en) * 2002-02-21 2006-05-04 Code Gmbh Commercial Developments Process for the metallurgical utilization of metal-containing sludges and dusts
DE10333764B3 (en) * 2003-07-23 2004-12-30 Outokumpu Oy Charging fine, directly-reduced iron particles into arc furnace, passes stream of bulk material from downcomer through orifice plate, to enter furnace largely undisturbed
AT502904B1 (en) 2005-12-07 2008-02-15 Voest Alpine Ind Anlagen CONVEYOR SYSTEM, PLANT ASSEMBLY AND METHOD OF COUPLING METALLURGICAL PROCESSES
ITUD20070075A1 (en) * 2007-04-26 2008-10-27 Danieli Automation Spa PROCEDURE FOR CONTROL OF THE FEEDING OF THE METAL CHARGING FOR ARC ARC ELECTRIC OVENS
DE102014011231A1 (en) 2014-07-23 2016-01-28 Sms Group Gmbh Process for Nickel Pig Iron (NPI) decarburization in the AOD converter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2015017A1 (en) * 1970-03-28 1971-10-14 Basalaew A Gas carbon electrode seal for arc furnaces
FR2360857A1 (en) * 1976-08-02 1978-03-03 Siderurgie Fse Inst Rech Reducing wear of graphite electrodes in arc furnaces - by surrounding electrodes with telescopic ducts contg. inert gas
FR2437760A1 (en) * 1978-09-29 1980-04-25 Siderurgie Fse Inst Rech Electric contact for molten metal, esp. in arc furnaces - where contact has enlarged rear portion contg. several chambers through which coolant is circulated
DE3406760A1 (en) * 1984-02-24 1985-09-05 C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach METHOD AND DEVICE FOR MELTING AND HEATING MATERIALS
US4941149A (en) * 1987-03-17 1990-07-10 Nippon Carbon Co., Ltd. Method of melting and/or refining metals and cooling device for the graphite electrode used for the same
DE3940848A1 (en) * 1989-12-11 1991-06-13 Foseco Int METHOD AND DEVICE FOR CLOSING THE GAP BETWEEN ELECTRODE AND OVEN COVER OF AN ELECTRIC MELTING FURNACE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56123318A (en) * 1980-02-29 1981-09-28 Kawasaki Steel Corp Refining method of metal refining furnace for producing large amount of co for recovering exhaust gas
DE3103730A1 (en) * 1981-02-04 1982-09-02 Fried. Krupp Gmbh, 4300 Essen Process for adjusting the operating position of blow-in lances relative to a molten bath and apparatus for carrying out the process
DE3912061A1 (en) * 1989-04-13 1990-10-18 Messer Griesheim Gmbh METHOD FOR PRODUCING ALLOY STEEL BRANDS
ATA155793A (en) * 1993-08-04 1996-04-15 Voest Alpine Ind Anlagen METHOD FOR PRODUCING A METAL MELT AND SYSTEM FOR IMPLEMENTING THE METHOD

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2015017A1 (en) * 1970-03-28 1971-10-14 Basalaew A Gas carbon electrode seal for arc furnaces
FR2360857A1 (en) * 1976-08-02 1978-03-03 Siderurgie Fse Inst Rech Reducing wear of graphite electrodes in arc furnaces - by surrounding electrodes with telescopic ducts contg. inert gas
FR2437760A1 (en) * 1978-09-29 1980-04-25 Siderurgie Fse Inst Rech Electric contact for molten metal, esp. in arc furnaces - where contact has enlarged rear portion contg. several chambers through which coolant is circulated
DE3406760A1 (en) * 1984-02-24 1985-09-05 C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach METHOD AND DEVICE FOR MELTING AND HEATING MATERIALS
US4941149A (en) * 1987-03-17 1990-07-10 Nippon Carbon Co., Ltd. Method of melting and/or refining metals and cooling device for the graphite electrode used for the same
DE3940848A1 (en) * 1989-12-11 1991-06-13 Foseco Int METHOD AND DEVICE FOR CLOSING THE GAP BETWEEN ELECTRODE AND OVEN COVER OF AN ELECTRIC MELTING FURNACE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Jp 5-114479 A u. englischsprachiges Abstract in Patent Abstracts of Japan Sect.E, Sect.No.1423, Vol.17 No.473, Pg.124 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998043030A1 (en) * 1997-03-25 1998-10-01 Acciai Speciali Terni S.P.A. Device to protect graphite electrodes in an electric arc furnace
US10694592B1 (en) 2018-10-15 2020-06-23 Chemtreat, Inc. Methods of protecting furnace electrodes with cooling liquid that contains an additive
US11140755B2 (en) 2018-10-15 2021-10-05 Chemtreat, Inc. Methods of protecting furnace electrodes with cooling liquid that contains an additive
US11653426B2 (en) 2018-10-15 2023-05-16 Chemtreat, Inc. Methods of protecting furnace electrodes with cooling liquid that contains an additive
US11979968B2 (en) 2018-10-15 2024-05-07 Chemtreat, Inc. Spray cooling furnace electrodes with a cooling liquid that contains surfactants

Also Published As

Publication number Publication date
DE19608531C2 (en) 1998-02-26
DE19608531A1 (en) 1997-08-14
DE19608530C2 (en) 1999-01-14
DE19608530A1 (en) 1997-08-14

Similar Documents

Publication Publication Date Title
DE19608532A1 (en) Cooling the electrodes in an arc furnace during steel production
DE7441597U (en) DEVICE FOR PRODUCING SPHERICAL METAL POWDER NOT CONTAMINATED BY THE AMBIENT AIR
DE6915297U (en) DEVICE FOR THE PRODUCTION OF STRIP METAL, IN PARTICULAR STRIP STEEL.
DE19817590C1 (en) Combination lance for treatment of metallurgical melts
DE1922680A1 (en) Method and device for casting metals, in particular steel, in molds
DE685576C (en) Process for the production of metal powder from liquid metal
DE2420347B2 (en) DEVICE FOR THE MANUFACTURING OF COPPER WIRE
DE830387C (en) Method and device for continuous casting of a metal strand
DE2030426A1 (en)
DE967617C (en) Gas metallurgical process for improving metal melts, in particular steel and cast iron melts
DE2608115A1 (en) PROCEDURE FOR THE REMEDY OF SURFACE DEFECTS IN STEEL PRODUCTS
DE1817124A1 (en) Method and device for cooling metal melts formed by electroslag remelting, in particular steel melts
DE4430856C2 (en) Process for reducing and controlling the surface scaling when hot rolling flat products, especially hot strips
DE753985C (en) Device for cooling the metal during continuous casting
DE1956550A1 (en) Device for casting wire
DE1176976B (en) Device for the production of protrusions and indentations having powder from relatively easily fusible metals
DE2731866A1 (en) METHOD AND DEVICE FOR FLASHING A WORKPIECE SURFACE TO REMOVE SURFACE DAMAGE
DE821903C (en) Method of manufacturing bearing shells
DE750193C (en) Device for peeling metal bodies by treatment with a band of oxygen currents
DE321034C (en) Process for removing slag inclusions and gases from normally finished iron or steel
DE496314C (en) Process for the heat treatment of solid or semi-liquid cast blocks using high-frequency currents
DE513465C (en) Process for protecting metal parts and metal objects against the ingress of carbon during the application treatment
DE1919416C (en) Method and device for knocking down a metal melt divided into droplets in the form of a metal layer on a cooled collecting surface
DE19919332A1 (en) Continuously cast strand surface cleaning process, especially for slag and scale removal from steel strands prior to direct rolling, comprises directing oxygen-enriched air onto the cast surface
DE2051406A1 (en) Method for adding an alloy surcharge to a ferrous metal

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8139 Disposal/non-payment of the annual fee