EP0050683A1 - Elektrode für Lichtbogenöfen - Google Patents

Elektrode für Lichtbogenöfen Download PDF

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Publication number
EP0050683A1
EP0050683A1 EP80106582A EP80106582A EP0050683A1 EP 0050683 A1 EP0050683 A1 EP 0050683A1 EP 80106582 A EP80106582 A EP 80106582A EP 80106582 A EP80106582 A EP 80106582A EP 0050683 A1 EP0050683 A1 EP 0050683A1
Authority
EP
European Patent Office
Prior art keywords
electrode
inner part
electrode according
outer part
upper section
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Withdrawn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
EP80106582A
Other languages
German (de)
English (en)
French (fr)
Inventor
Hanns Georg Dr. Dipl.-Ing. Bauer
Dieter H. Dr. Dipl.-Chem. Zöllner
Josef Dr. Dipl.-Ing. Otto
Josef Mühlenbeck
Friedrich Rittmann
Claudio Dipl.-Ing. Conradty
Inge Dr. Dipl.-Chem. Lauterbach-Dammler
Horst Ing. Grad. Sonke
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.)
Arc Technologies Systems Ltd
Original Assignee
Arc Technologies Systems Ltd
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 Arc Technologies Systems Ltd filed Critical Arc Technologies Systems Ltd
Priority to EP80106582A priority Critical patent/EP0050683A1/de
Priority to GR66352A priority patent/GR78058B/el
Priority to US06/285,563 priority patent/US4425657A/en
Priority to CA000383615A priority patent/CA1168684A/en
Priority to PL23270881A priority patent/PL232708A1/xx
Priority to JP56132022A priority patent/JPS5776787A/ja
Priority to IN1168/CAL/81A priority patent/IN156476B/en
Priority to NZ198753A priority patent/NZ198753A/en
Priority to NZ198754A priority patent/NZ198754A/en
Priority to ES507051A priority patent/ES507051A0/es
Priority to ZA817416A priority patent/ZA817416B/xx
Priority to BR8106903A priority patent/BR8106903A/pt
Priority to TR21882A priority patent/TR21882A/xx
Priority to GB8132211A priority patent/GB2089627A/en
Priority to YU02554/81A priority patent/YU255481A/xx
Priority to PT73882A priority patent/PT73882B/pt
Priority to DE19813142369 priority patent/DE3142369A1/de
Priority to SU813345827A priority patent/SU1152535A3/ru
Priority to FI813340A priority patent/FI813340L/fi
Priority to DD81234360A priority patent/DD201835A5/de
Priority to NO813605A priority patent/NO813605L/no
Priority to DK471681A priority patent/DK471681A/da
Priority to AU76816/81A priority patent/AU7681681A/en
Publication of EP0050683A1 publication Critical patent/EP0050683A1/de
Withdrawn 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

Definitions

  • the invention relates to an electrode for arc furnaces made of a separable upper section made of metal and a replaceable lower section made of consumable or only slowly consumed material, which have a substantially cylindrical shape and by a screw nipple or the g l. are connected to one another, the upper section having a liquid cooling device with a flow channel and a return channel.
  • Electrodes of this type as are known for example from DE-AS 27 39 483, have the advantage over conventional carbon electrodes that only the tip of the electrode can be used up and must be replaced. In contrast, the remaining electrode part, namely the liquid-cooled electrode holder, can be used over a longer period of time.
  • Electrodes of this type are subjected to considerable stress when used in an arc furnace, in particular one in which scrap is melted down. Damage to the electrode, for example in the area of the high-temperature-resistant coating or in the liquid-cooled upper part of the electrode, can already occur when the electrode is moved into the oven. There is also a risk of arcing between the upper metal shaft, which conducts the electrical current, in which the coolant is guided and the metallic insert of the arc furnace. In addition, the slipping of shot parts into the melt results in mechanical stresses, and such and other faults can lead to electrode failure, water ingress into the arc furnace due to leakage of the coolant and explosions.
  • Electrodes of this type have become known, for example, from DE-OS 1 565 208 and US Pat. No. 3,689,740, the arc being conducted over the electrode tip at sufficient speed by means of magnetic fields. Such electrodes have so far not been able to assert themselves in arc furnaces in which scrap is melted due to the risk of short-circuiting when the electrodes are retracted or the tendency to damage when the batch is melted down.
  • European patent application 79302809.3 describes a likewise ceramic-protected electrode, in which the liquid cooling is central in the metal shaft runs. For additional security, graphite rods are inserted in it, the breakage or erosion of which can be controlled by the pressure of gas flowing around these rods. Although such a design of the metal shaft makes it easier to check mechanical damage, the overall design of the electrode is relatively complex and mechanical damage to the metal shaft that actually occurs can only be remedied with considerable effort after the entire electrode has been removed.
  • DE-AS 27 39 483 also describes an electrode of the type mentioned at the outset, in which the liquid cooling, among other things.
  • ring channels directly on the outer wall ensure that the liquid return is directly adjacent to the outer surface line of the metal shaft, so that the outer wall of the metal shaft simultaneously represents the inner wall of the return channel.
  • the invention has for its object to provide a safe working, maintenance-friendly and less prone to failure electrode.
  • it should be easy to assemble or disassemble for inspection.
  • the cooling liquid should be prevented from escaping and rapid, simple repairs should be possible while minimizing downtimes.
  • an electrode of the type mentioned at the outset which is characterized in that an inner part and an outer part of the upper section are designed to be detachable from one another in such a way that the inner part contains the liquid guiding chamber with flow and return channels, and the outer Part of the inner part may only be covered in a partial section.
  • the outer part represents the connection electrode and can consist of the same metal or metal alloy as the inner part. Cooling bores or the like can be made in the outer part. Furthermore, it is also possible to drill holes in the outer part, e.g. for guiding and storing insulating protective layers underneath.
  • the inner part is encased by the outer part only in a partial area, so that the metal shaft as a whole can be formed from an upper area of larger diameter and a lower area of smaller diameter.
  • the inner part can be caused by a high temperature be resistant insulating layer which, for example, advantageously adjoins the outer part downwards and extends up to the vicinity of the screw nipple or the like or beyond to a generally small partial coverage of the consumable part.
  • the high-temperature-resistant insulating layer can consist of ceramic material, but also of graphite coated with ceramic material.
  • the insulating layer can consist of a solid molded part, for example a coated graphite single tube or a series of sub-segments, which can hold themselves independently in a counter bearing, for example according to the tongue and groove system, and are movable in the direction of the electrode axis.
  • the electrode in which the inner part is encased in an upper part region, in particular in the region of the side power supply, it is generally not necessary to additionally coat the outer part with a ceramic, insulating coating.
  • this will depend on the respective dimensioning of the height of the outer part in relation to the inner part and can be determined accordingly depending on the use and purpose of the electrode.
  • the inner part of the electrode is led into the nipple connection with which the upper section of metal and the consumable lower section are connected.
  • the liquid cooling device of the inner part which runs axially in the latter, is advantageously inserted into the screw nipple itself, since this is more special, depending on the material used May be exposed to heat.
  • connection between the inner and outer part can be done in several ways.
  • the connecting line is usually parallel to the electrode axis.
  • the detachable connection can be made by means of a thread or by correspondingly fitting the parts. It is particularly preferred when the inner part is constructed as a adapter piece in conical or cone shape!, 'Wherein the outer and inner member optionally can additionally comprise a thread in a partial area.
  • Connection jaws e.g. be attached via pockets or holders with which the power supply for the electrode is connected.
  • pockets are fastened to the outer part, in which graphite plates or segments are introduced for power supply.
  • a number of advantages are achieved by designing the electrode according to the invention. Due to the water routing in the inner part, it remains intact even if the outer part is mechanically damaged. In the event of damage to the outer area of the upper section, it is therefore not necessary to stop the supply of coolant, to empty the electrode, etc. Because of the simple detachability of the outer section, it can be easily replaced in the event of damage as a component, while the conventional constructions are complete Repair or replace the metal shaft. Due to the lateral power supply, for example via graphite contact jaws or segments, which are attached, for example, in holding pockets, it is in the event of malfunctions in the Area of the internal fluid guide is not necessary to carry out the electrode as a whole from the contact rail, since only the inner part can be triggered.
  • the high-temperature-resistant, insulating protective layer can be connected in a particularly compact and expedient form, it not being necessary, for example, for the outer part if this is in the area of the power supply is limited to provide additional insulation.
  • connection options of inner part 16 and outer part 17 can be seen as a fitting piece, optionally also with a partial thread.
  • Pins 9 or the like can be guided over bores 8, which hold the insulating coating 4 on a counter bearing 7 via the spring 10.
  • the insulating part can additionally be fastened by brackets 14. Cooling holes 15 are shown in the outer part, while connecting jaws 18, e.g. are shown from graphite. These can be held in brackets or pockets 19 which are attached to the outer edge of the metal shaft.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
EP80106582A 1980-10-27 1980-10-27 Elektrode für Lichtbogenöfen Withdrawn EP0050683A1 (de)

Priority Applications (23)

Application Number Priority Date Filing Date Title
EP80106582A EP0050683A1 (de) 1980-10-27 1980-10-27 Elektrode für Lichtbogenöfen
GR66352A GR78058B (da) 1980-10-27 1981-01-08
US06/285,563 US4425657A (en) 1980-10-27 1981-07-21 Electrode for arc furnaces
CA000383615A CA1168684A (en) 1980-10-27 1981-08-11 Electrode for arc furnaces
PL23270881A PL232708A1 (da) 1980-10-27 1981-08-19
JP56132022A JPS5776787A (en) 1980-10-27 1981-08-21 Electrode for arc furnace
IN1168/CAL/81A IN156476B (da) 1980-10-27 1981-10-21
NZ198753A NZ198753A (en) 1980-10-27 1981-10-23 Arc furnace electrode:mouldings protect cooling ducts
NZ198754A NZ198754A (en) 1980-10-27 1981-10-23 Arc furnace electrode:metal top portion liquid cooled
ES507051A ES507051A0 (es) 1980-10-27 1981-10-26 Mejoras en la fabricacion de electrodos para hornos de arco.
ZA817416A ZA817416B (en) 1980-10-27 1981-10-26 Electrode for arc furnaces
BR8106903A BR8106903A (pt) 1980-10-27 1981-10-26 Eletrodo para fornos de arco voltaico
TR21882A TR21882A (tr) 1980-10-27 1981-10-26 Arkh firinlar icin elektrod
GB8132211A GB2089627A (en) 1980-10-27 1981-10-26 Electrode for arc furnaces
YU02554/81A YU255481A (en) 1980-10-27 1981-10-26 Electrode for electric arc furnaces
PT73882A PT73882B (en) 1980-10-27 1981-10-26 Electrode for arc furnaces
DE19813142369 DE3142369A1 (de) 1980-10-27 1981-10-26 Elektrode fuer lichtbogenoefen
SU813345827A SU1152535A3 (ru) 1980-10-27 1981-10-26 Электрод дл дуговой электропечи
FI813340A FI813340L (fi) 1980-10-27 1981-10-26 Elektrod foer ljusbaogeugnar
DD81234360A DD201835A5 (de) 1980-10-27 1981-10-26 Elektrode fuer lichtbogenoefen
NO813605A NO813605L (no) 1980-10-27 1981-10-26 Elektrode for lysbueovner.
DK471681A DK471681A (da) 1980-10-27 1981-10-26 Elektrods til lysbueovne
AU76816/81A AU7681681A (en) 1980-10-27 1981-10-26 Electrode for arc furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80106582A EP0050683A1 (de) 1980-10-27 1980-10-27 Elektrode für Lichtbogenöfen

Publications (1)

Publication Number Publication Date
EP0050683A1 true EP0050683A1 (de) 1982-05-05

Family

ID=8186861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106582A Withdrawn EP0050683A1 (de) 1980-10-27 1980-10-27 Elektrode für Lichtbogenöfen

Country Status (21)

Country Link
US (1) US4425657A (da)
EP (1) EP0050683A1 (da)
JP (1) JPS5776787A (da)
AU (1) AU7681681A (da)
BR (1) BR8106903A (da)
CA (1) CA1168684A (da)
DD (1) DD201835A5 (da)
DE (1) DE3142369A1 (da)
DK (1) DK471681A (da)
ES (1) ES507051A0 (da)
FI (1) FI813340L (da)
GB (1) GB2089627A (da)
GR (1) GR78058B (da)
IN (1) IN156476B (da)
NO (1) NO813605L (da)
NZ (2) NZ198753A (da)
PL (1) PL232708A1 (da)
PT (1) PT73882B (da)
TR (1) TR21882A (da)
YU (1) YU255481A (da)
ZA (1) ZA817416B (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056862A2 (de) * 1981-01-28 1982-08-04 Arc Technologies Systems, Ltd. Elektrode für Lichtbogenöfen

Families Citing this family (6)

* 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
US4513425A (en) * 1983-07-15 1985-04-23 Great Lakes Carbon Corporation Composite electrode for arc furnace
DE3569703D1 (en) 1984-01-17 1989-06-01 Fuji Photo Film Co Ltd Presensitized plate having an anodized aluminum base with an improved hydrophilic layer
JPS6192990A (ja) * 1984-10-12 1986-05-10 Mitsubishi Heavy Ind Ltd 上部構造物制御支持船舶
IT201800005620A1 (it) * 2018-05-23 2019-11-23 Elettrodo raffreddato per forno metallurgico elettrico
CN113847818B (zh) * 2021-09-02 2023-11-17 山东晶盾新材料科技有限公司 一种用于快速热压烧结的电极

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600823A (en) * 1949-01-15 1952-06-17 Allegheny Ludlum Steel Hot top electrode tip
FR1418153A (fr) * 1964-10-05 1965-11-19 Siderurgie Fse Inst Rech Dispositif de passage d'électrodes dans un four électrique
FR2176546A1 (en) * 1972-03-23 1973-11-02 Siderurgie Fse Inst Rech Composite furnace electrode - esp for steel prodn
US4145564A (en) * 1978-01-30 1979-03-20 Andrew Dennie J Non-consumable electrode with replaceable graphite tip
EP0010305B1 (de) * 1978-10-18 1981-04-22 Fuchs Systemtechnik GmbH Flüssigkeitsgekühlte Halterung für eine Elektrodenspitze

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287381A (en) * 1978-12-19 1981-09-01 British Steel Corporation Electric arc furnace electrodes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600823A (en) * 1949-01-15 1952-06-17 Allegheny Ludlum Steel Hot top electrode tip
FR1418153A (fr) * 1964-10-05 1965-11-19 Siderurgie Fse Inst Rech Dispositif de passage d'électrodes dans un four électrique
FR2176546A1 (en) * 1972-03-23 1973-11-02 Siderurgie Fse Inst Rech Composite furnace electrode - esp for steel prodn
US4145564A (en) * 1978-01-30 1979-03-20 Andrew Dennie J Non-consumable electrode with replaceable graphite tip
EP0010305B1 (de) * 1978-10-18 1981-04-22 Fuchs Systemtechnik GmbH Flüssigkeitsgekühlte Halterung für eine Elektrodenspitze

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056862A2 (de) * 1981-01-28 1982-08-04 Arc Technologies Systems, Ltd. Elektrode für Lichtbogenöfen
EP0056862A3 (de) * 1981-01-28 1982-10-20 Arc Technologies Systems, Ltd. Elektrode für Lichtbogenöfen

Also Published As

Publication number Publication date
TR21882A (tr) 1985-10-03
DE3142369A1 (de) 1982-09-23
JPS5776787A (en) 1982-05-13
ES8302995A1 (es) 1982-12-01
IN156476B (da) 1985-08-10
PT73882A (en) 1981-11-01
FI813340L (fi) 1982-04-28
PT73882B (en) 1983-01-25
GB2089627A (en) 1982-06-23
PL232708A1 (da) 1982-06-21
DK471681A (da) 1982-04-28
CA1168684A (en) 1984-06-05
BR8106903A (pt) 1982-07-13
US4425657A (en) 1984-01-10
ZA817416B (en) 1983-03-30
AU7681681A (en) 1982-05-06
YU255481A (en) 1983-12-31
ES507051A0 (es) 1982-12-01
DD201835A5 (de) 1983-08-10
GR78058B (da) 1984-09-26
NZ198754A (en) 1985-04-30
NZ198753A (en) 1984-10-19
NO813605L (no) 1982-04-28

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

ITCL It: translation for ep claims filed

Representative=s name: PROF. FRANCO CICOGNA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ARC TECHNOLOGIES SYSTEMS, LTD.

17P Request for examination filed

Effective date: 19821020

TCNL Nl: translation of patent claims filed
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CONRADTY, CLAUDIO, DIPL.-ING.

Inventor name: LAUTERBACH-DAMMLER, INGE, DR. DIPL.-CHEM.

Inventor name: RITTMANN, FRIEDRICH

Inventor name: MUEHLENBECK, JOSEF

Inventor name: OTTO, JOSEF, DR. DIPL.-ING.

Inventor name: ZOELLNER, DIETER H., DR. DIPL.-CHEM.

Inventor name: BAUER, HANNS GEORG, DR. DIPL.-ING.

Inventor name: SONKE, HORST, ING. GRAD.