EP0077513A1 - Procédé pour empêcher l'usure d'une électrode conductrice de courant pour fours métallurgiques et électrode - Google Patents

Procédé pour empêcher l'usure d'une électrode conductrice de courant pour fours métallurgiques et électrode Download PDF

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Publication number
EP0077513A1
EP0077513A1 EP82109375A EP82109375A EP0077513A1 EP 0077513 A1 EP0077513 A1 EP 0077513A1 EP 82109375 A EP82109375 A EP 82109375A EP 82109375 A EP82109375 A EP 82109375A EP 0077513 A1 EP0077513 A1 EP 0077513A1
Authority
EP
European Patent Office
Prior art keywords
electrode
current
consumption
copper
preventing
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
EP82109375A
Other languages
German (de)
English (en)
Other versions
EP0077513B1 (fr
Inventor
Emil Elsner
Josef Messmer
Dietfried Reiber
Peter Kaiser
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.)
C Conradty Nuernberg GmbH and Co KG
Original Assignee
Von Roll AG
C Conradty Nuernberg GmbH and Co KG
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 Von Roll AG, C Conradty Nuernberg GmbH and Co KG filed Critical Von Roll AG
Priority to AT82109375T priority Critical patent/ATE16070T1/de
Publication of EP0077513A1 publication Critical patent/EP0077513A1/fr
Application granted granted Critical
Publication of EP0077513B1 publication Critical patent/EP0077513B1/fr
Expired legal-status Critical Current

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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
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc
    • 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
    • H05B7/12—Arrangements for cooling, sealing or protecting electrodes

Definitions

  • the invention relates to a method for preventing the erosion on peripheral surfaces of a current-conducting electrode for metallurgical furnaces, which is composed of a permanent top part and an edible tip and is cooled in the top part, and a current-conducting electrode for carrying out the method.
  • Electric furnaces for melting steel scrap are usually used graphite or carbon electrodes. Since these are subject to constant burning during the melting process, they have to be replaced at least partially periodically. However, the raw materials for the production of such electrodes are becoming increasingly scarce and are also subject to constant price increases, which means that the proportionate costs for the electrodes in the metallurgical processes increase accordingly.
  • the consumption of graphite electrodes is made up as follows: Of the total consumption, about 50% is the erosion of the electrode tip, about 45% of the side electrode erosion and about 5% is lost due to electrode breakage.
  • Electrodes are known in which the upper part does not consist of graphite but of a metal, for example a copper tube, which is cooled by a cooling medium. An edible graphite tip is attached to this upper part by means of a threaded nipple made of graphite or metal.
  • the electrode parts of the upper part, which are made of metal, have the disadvantage that they are subject to higher heat losses and there is a risk of burning when they come into contact with conductive parts, for example steel scrap.
  • the permanent upper part is made of graphite or carbon and is cooled below the burn-off temperature by a cooling medium guided inside the same.
  • An electrode is used for carrying out the method, in which the permanent upper part with two or more metal tubes, e.g. made of copper, in which the cooling medium circulates.
  • the current-conducting electrode shown in Fig. 1 is composed of three electrode parts I, II, III, of which parts I, II form the permanent upper part and part III the consumable tip of the electrode.
  • the electrode is covered by a cover plate 1 which projects over the cross section of the electrode in order to prevent it from slipping through the electrode holder.
  • a part of the electrode holder 2, which is designed to receive the electrode in a manner not shown, can be seen under the cover plate 1.
  • On the cover plate 1 is also a Support bracket 3 attached.
  • the electrode parts I, II, III are screwed tightly by means of threaded nipples 4, 5 arranged in the center of the electrode cross section.
  • the threaded nipple 4 can also be made of graphite or copper, while the threaded nipple 5, as will be shown, is expediently made of copper.
  • a tongue and groove connection can be used.
  • the electrode does not have to be composed of the three parts I, II, III shown in FIG. 1.
  • the upper part can either consist of only a single electrode part or of more than two electrode parts.
  • the inventive design of the electrode is explained in more detail with reference to FIGS. 2 and 3.
  • the nipple 4 is no longer completely drawn here, since it remains unchanged compared to known designs.
  • a number of copper tubes 6, one of which is shown in FIG. 2, extend through the electrode parts I, II of the permanent upper part.
  • the copper tubes 6 are provided at their ends with an external thread onto which nuts 7 with a flange are screwed at the upper end and nuts 9 at the lower end.
  • an intermediate plate 10 is arranged, through which the copper tubes 6 extend and which is held by the nuts 9.
  • a recess 11 is provided in the intermediate plate 10 at each pipe mouth, into which two conical rings 12, 13 made of soft copper are inserted and which are pressed together by the nut 9, so that a good conductive contact

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Resistance Heating (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Contacts (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
EP82109375A 1981-10-15 1982-10-09 Procédé pour empêcher l'usure d'une électrode conductrice de courant pour fours métallurgiques et électrode Expired EP0077513B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109375T ATE16070T1 (de) 1981-10-15 1982-10-09 Verfahren zur verhinderung des abbrands an einer stromleitenden elektrode fuer metallurgische oefen und elektrode.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH660581 1981-10-15
CH6605/81 1981-10-15

Publications (2)

Publication Number Publication Date
EP0077513A1 true EP0077513A1 (fr) 1983-04-27
EP0077513B1 EP0077513B1 (fr) 1985-10-09

Family

ID=4312194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109375A Expired EP0077513B1 (fr) 1981-10-15 1982-10-09 Procédé pour empêcher l'usure d'une électrode conductrice de courant pour fours métallurgiques et électrode

Country Status (11)

Country Link
US (1) US4498185A (fr)
EP (1) EP0077513B1 (fr)
JP (1) JPS5875791A (fr)
AT (1) ATE16070T1 (fr)
BR (1) BR8206010A (fr)
CA (1) CA1204807A (fr)
DD (1) DD203805A5 (fr)
DE (1) DE3266857D1 (fr)
DK (1) DK456482A (fr)
ES (1) ES516265A0 (fr)
ZA (1) ZA826996B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490824A (en) * 1983-07-15 1984-12-25 Great Lakes Carbon Corporation Composite electrode for arc furnace
WO1985000722A1 (fr) * 1983-07-15 1985-02-14 Great Lakes Carbon Corporation Electrode composite pour fours a arc

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853942A (en) * 1986-08-05 1989-08-01 Hylsa, S.A. De C.V. Graphite electrode with internal cooling for electric arc furnaces
RU2166843C2 (ru) * 1999-07-28 2001-05-10 Открытое акционерное общество "Институт Гипроникель" Нерасходуемый электрод
FI123373B (fi) * 2008-06-06 2013-03-15 Outotec Oyj Tiivistyslaite

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE313852C (fr) *
DE218054C (fr) *
DE1565751A1 (de) * 1965-07-13 1970-02-12 Oestberg Jan Erik Elektrode fuer elektrische Lichtbogenoefen
FR2394224A1 (fr) * 1977-06-06 1979-01-05 Korf Stahl Electrode pour fours a arc
EP0012573A1 (fr) * 1978-12-19 1980-06-25 British Steel Corporation Electrodes pour four à arc
EP0010305B1 (fr) * 1978-10-18 1981-04-22 Fuchs Systemtechnik GmbH Support refroidi par un liquide pour l'extrémité d'une électrode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392227A (en) * 1965-07-13 1968-07-09 Jan Erik Ostberg Electrode for arc furnaces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE313852C (fr) *
DE218054C (fr) *
DE1565751A1 (de) * 1965-07-13 1970-02-12 Oestberg Jan Erik Elektrode fuer elektrische Lichtbogenoefen
FR2394224A1 (fr) * 1977-06-06 1979-01-05 Korf Stahl Electrode pour fours a arc
EP0010305B1 (fr) * 1978-10-18 1981-04-22 Fuchs Systemtechnik GmbH Support refroidi par un liquide pour l'extrémité d'une électrode
EP0012573A1 (fr) * 1978-12-19 1980-06-25 British Steel Corporation Electrodes pour four à arc

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490824A (en) * 1983-07-15 1984-12-25 Great Lakes Carbon Corporation Composite electrode for arc furnace
WO1985000722A1 (fr) * 1983-07-15 1985-02-14 Great Lakes Carbon Corporation Electrode composite pour fours a arc
WO1985000721A1 (fr) * 1983-07-15 1985-02-14 Great Lakes Carbon Corporation Electrode composite pour fours a arc
US4513425A (en) * 1983-07-15 1985-04-23 Great Lakes Carbon Corporation Composite electrode for arc furnace

Also Published As

Publication number Publication date
ES8401140A1 (es) 1983-12-01
ATE16070T1 (de) 1985-10-15
JPS5875791A (ja) 1983-05-07
DE3266857D1 (en) 1985-11-14
DD203805A5 (de) 1983-11-02
EP0077513B1 (fr) 1985-10-09
ZA826996B (en) 1983-07-27
BR8206010A (pt) 1983-09-13
US4498185A (en) 1985-02-05
DK456482A (da) 1983-04-16
CA1204807A (fr) 1986-05-20
ES516265A0 (es) 1983-12-01

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