EP1446984A2 - Elektrode, insbesondere für elektrolichtbogenofen der stahlindustrie und dergleichen, und entsprechende operationsmethode - Google Patents

Elektrode, insbesondere für elektrolichtbogenofen der stahlindustrie und dergleichen, und entsprechende operationsmethode

Info

Publication number
EP1446984A2
EP1446984A2 EP02788534A EP02788534A EP1446984A2 EP 1446984 A2 EP1446984 A2 EP 1446984A2 EP 02788534 A EP02788534 A EP 02788534A EP 02788534 A EP02788534 A EP 02788534A EP 1446984 A2 EP1446984 A2 EP 1446984A2
Authority
EP
European Patent Office
Prior art keywords
electrode
fluid
gaseous hydrocarbon
combustible
tip
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.)
Granted
Application number
EP02788534A
Other languages
English (en)
French (fr)
Other versions
EP1446984B1 (de
Inventor
Domenico Cent. Sviluppo Materiali SpA CAPODILUPO
Vittorio Cent. Sviluppo Materiali SpA RATTO
Eugenio Cent. Sviluppo Materiali SpA REPETTO
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.)
Rina Consulting Centro Sviluppo Materiali SpA
Original Assignee
Centro Sviluppo Materiali SpA
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 Centro Sviluppo Materiali SpA filed Critical Centro Sviluppo Materiali SpA
Publication of EP1446984A2 publication Critical patent/EP1446984A2/de
Application granted granted Critical
Publication of EP1446984B1 publication Critical patent/EP1446984B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable
    • H05B7/085—Electrodes non-consumable mainly consisting of carbon

Definitions

  • the technical problem underlying the present invention is that of providing novel electrodes allowing to overcome the abovementioned drawbacks, in particular allowing to reduce the consumption thereof and therefore the maintenance interventions.
  • the electrode 10 is provided with an axial hole 19, first means for ejecting a fluid comprising a nozzle 20 being housed therein.
  • the nozzle 20 water-cooled by means of a cooling duct 18 running therethrough, is slidable inside of the hole 19.
  • the fluid 22 comprises at least one heat decomposable Carbon-rich combustible component, in particular a gaseous hydrocarbon selected from the group comprising methane, ethane, propane, butane and mixtures thereof, and it is denominated 'reactive fluid' as it is apt to carry out a reducing/combustible action, with metallurgic functions analogous to those of coal usually found inside of an electric furnace.
  • the fluid 22 exits the ejecting nozzle, crossing the end section of the axial hole of the electrode at a suitable rate, heating up, yet not slowly enough to undergo substantial chemical transformations, until reaching the tip 14 of the electrode 10 whereat its molecular breaking is carried out by the heat provided by an electric arc.
  • the electrode 10 (graphite and metallic material versions) further comprises second means 23 for ejecting a second fluid 24. Said means 23 is positioned onto the cylinder-shaped surface of the electrode 10, bottomwise to the body 16.
  • the nozzle head 21 may comprise a single inlet, from which a fluid, optionally in a mixture formed with at least one fluid reactive component is injected, or it may comprise a plurality of outlets, each corresponding to a reactive fluid ejected and fed separately from the other fluids.
  • the electric arc 15 radiates less towards the refractory walls of the furnace 1, reducing the entailed damage thereto and also improving heat transmission to the bath 12.
  • the mentioned results have been constantly sought in steelshop electric furnaces, during flat bath operation steps, by generating foaming slags or reducing the electrical power, entailing bath oxidation and productivity decrease, respectively.
  • the shortening of the electric arc attained by this method reduces the need to employ materials (C, CaCO 3 , carbides) to generate foaming slags.
  • foaming slag generation is extremely difficult and costly in terms of Cr yield, Cr being oxidized by the generation-required Oxygen.
  • the employ of the electrode subject-matter of the present invention allowed to generally decrease the environmental impact, owing to reduced:

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Furnace Details (AREA)
  • Carbon And Carbon Compounds (AREA)
EP02788534A 2001-10-26 2002-10-25 Elektrode, insbesondere für elektrolichtbogenöfen der stahlindustrie und dergleichen, und entsprechende operationsmethode Expired - Lifetime EP1446984B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITRM20010634 2001-10-26
IT2001RM000634A ITRM20010634A1 (it) 2001-10-26 2001-10-26 Elettrodo, in particolare per forni elettrici ad arco di tipo siderurgico e simili, e relativo metodo di esercizio.
PCT/IT2002/000679 WO2003037038A2 (en) 2001-10-26 2002-10-25 Electrode, in particular for siderurgical electric arc furnaces and the like, and related operation method

Publications (2)

Publication Number Publication Date
EP1446984A2 true EP1446984A2 (de) 2004-08-18
EP1446984B1 EP1446984B1 (de) 2006-02-08

Family

ID=11455844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02788534A Expired - Lifetime EP1446984B1 (de) 2001-10-26 2002-10-25 Elektrode, insbesondere für elektrolichtbogenöfen der stahlindustrie und dergleichen, und entsprechende operationsmethode

Country Status (7)

Country Link
EP (1) EP1446984B1 (de)
AT (1) ATE317630T1 (de)
AU (1) AU2002353509A1 (de)
DE (1) DE60209146T2 (de)
ES (1) ES2260496T3 (de)
IT (1) ITRM20010634A1 (de)
WO (1) WO2003037038A2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013222158A1 (de) * 2013-10-31 2015-05-13 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Lichtbogenofens sowie Lichtbogenofen
DE102013222159A1 (de) * 2013-10-31 2015-04-30 Siemens Aktiengesellschaft Verfahren zum Betreiben eines Lichtbogenofens sowie Lichtbogenofen
JP6413710B2 (ja) * 2014-12-02 2018-10-31 新日鐵住金株式会社 直流アーク式電気炉による高純度鋼の製造方法
US20170280519A1 (en) * 2016-03-25 2017-09-28 Air Liquide Industrial U.S. Lp Inert gas blanketing of electrodes in an electric arc furnace
DE102020005130B3 (de) 2020-08-21 2022-02-10 Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts Verfahren zur Herstellung von kohlenstoffärmeren und kohlenstofffreien Elektroden-Wabenkörper-Werkstoffverbunden für den Einsatz in der Metallurgie
DE102020005129B4 (de) 2020-08-21 2024-05-16 Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts Kohlenstoffärmere und kohlenstofffreie Elektroden für den Einsatz in der Stahlmetallurgie
CN112595093B (zh) * 2020-11-26 2022-05-27 天津水泥工业设计研究院有限公司 一种用于电弧炉可喷吹粉剂的加热电极工艺及装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334116A (en) * 1971-01-22 1973-10-17 British Steel Corp Arc furnace operation
GB1390351A (en) * 1971-02-16 1975-04-09 Tetronics Research Dev Co Ltd High temperature treatment of materials
GB1532075A (en) * 1976-08-24 1978-11-15 Karinsky V Electric arc heating vacuum apparatus
DE3443740A1 (de) * 1984-10-11 1986-04-17 Fried. Krupp Gmbh, 4300 Essen Verfahren und vorrichtung zum halten oder erhoehen der temperatur einer metallschmelze
DE3629055A1 (de) * 1986-08-27 1988-03-03 Kloeckner Cra Tech Verfahren zum gesteigerten energieeinbringen in elektrolichtbogenoefen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03037038A3 *

Also Published As

Publication number Publication date
ES2260496T3 (es) 2006-11-01
WO2003037038A3 (en) 2004-05-06
ATE317630T1 (de) 2006-02-15
WO2003037038A2 (en) 2003-05-01
AU2002353509A1 (en) 2003-05-06
ITRM20010634A1 (it) 2003-04-28
ITRM20010634A0 (it) 2001-10-26
EP1446984B1 (de) 2006-02-08
DE60209146T2 (de) 2006-10-19
DE60209146D1 (de) 2006-04-20

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