EP0050683A1 - Electrode pour fours à arc - Google Patents
Electrode pour fours à arc Download PDFInfo
- 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- Withdrawn
Links
Images
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)
Priority Applications (23)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP80106582A EP0050683A1 (fr) | 1980-10-27 | 1980-10-27 | Electrode pour fours à arc |
GR66352A GR78058B (fr) | 1980-10-27 | 1981-01-08 | |
US06/285,563 US4425657A (en) | 1980-10-27 | 1981-07-21 | Electrode for arc furnaces |
CA000383615A CA1168684A (fr) | 1980-10-27 | 1981-08-11 | Electrode pour fours a arc |
PL23270881A PL232708A1 (fr) | 1980-10-27 | 1981-08-19 | |
JP56132022A JPS5776787A (en) | 1980-10-27 | 1981-08-21 | Electrode for arc furnace |
IN1168/CAL/81A IN156476B (fr) | 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 |
GB8132211A GB2089627A (en) | 1980-10-27 | 1981-10-26 | Electrode for arc furnaces |
DE19813142369 DE3142369A1 (de) | 1980-10-27 | 1981-10-26 | Elektrode fuer lichtbogenoefen |
FI813340A FI813340L (fi) | 1980-10-27 | 1981-10-26 | Elektrod foer ljusbaogeugnar |
AU76816/81A AU7681681A (en) | 1980-10-27 | 1981-10-26 | Electrode for arc furnaces |
ZA817416A ZA817416B (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 |
DD81234360A DD201835A5 (de) | 1980-10-27 | 1981-10-26 | Elektrode fuer lichtbogenoefen |
NO813605A NO813605L (no) | 1980-10-27 | 1981-10-26 | Elektrode for lysbueovner. |
ES507051A ES507051A0 (es) | 1980-10-27 | 1981-10-26 | Mejoras en la fabricacion de electrodos para hornos de arco. |
DK471681A DK471681A (da) | 1980-10-27 | 1981-10-26 | Elektrods til lysbueovne |
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 |
SU813345827A SU1152535A3 (ru) | 1980-10-27 | 1981-10-26 | Электрод дл дуговой электропечи |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP80106582A EP0050683A1 (fr) | 1980-10-27 | 1980-10-27 | Electrode pour fours à arc |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0050683A1 true EP0050683A1 (fr) | 1982-05-05 |
Family
ID=8186861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80106582A Withdrawn EP0050683A1 (fr) | 1980-10-27 | 1980-10-27 | Electrode pour fours à arc |
Country Status (21)
Country | Link |
---|---|
US (1) | US4425657A (fr) |
EP (1) | EP0050683A1 (fr) |
JP (1) | JPS5776787A (fr) |
AU (1) | AU7681681A (fr) |
BR (1) | BR8106903A (fr) |
CA (1) | CA1168684A (fr) |
DD (1) | DD201835A5 (fr) |
DE (1) | DE3142369A1 (fr) |
DK (1) | DK471681A (fr) |
ES (1) | ES507051A0 (fr) |
FI (1) | FI813340L (fr) |
GB (1) | GB2089627A (fr) |
GR (1) | GR78058B (fr) |
IN (1) | IN156476B (fr) |
NO (1) | NO813605L (fr) |
NZ (2) | NZ198754A (fr) |
PL (1) | PL232708A1 (fr) |
PT (1) | PT73882B (fr) |
TR (1) | TR21882A (fr) |
YU (1) | YU255481A (fr) |
ZA (1) | ZA817416B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0056862A2 (fr) * | 1981-01-28 | 1982-08-04 | Arc Technologies Systems, Ltd. | Electrode pour four à arc |
Families Citing this family (6)
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)
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 (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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4287381A (en) * | 1978-12-19 | 1981-09-01 | British Steel Corporation | Electric arc furnace electrodes |
-
1980
- 1980-10-27 EP EP80106582A patent/EP0050683A1/fr not_active Withdrawn
-
1981
- 1981-01-08 GR GR66352A patent/GR78058B/el unknown
- 1981-07-21 US US06/285,563 patent/US4425657A/en not_active Expired - Fee Related
- 1981-08-11 CA CA000383615A patent/CA1168684A/fr not_active Expired
- 1981-08-19 PL PL23270881A patent/PL232708A1/xx unknown
- 1981-08-21 JP JP56132022A patent/JPS5776787A/ja active Pending
- 1981-10-21 IN IN1168/CAL/81A patent/IN156476B/en unknown
- 1981-10-23 NZ NZ198754A patent/NZ198754A/en unknown
- 1981-10-23 NZ NZ198753A patent/NZ198753A/en unknown
- 1981-10-26 FI FI813340A patent/FI813340L/fi not_active Application Discontinuation
- 1981-10-26 YU YU02554/81A patent/YU255481A/xx unknown
- 1981-10-26 DD DD81234360A patent/DD201835A5/de unknown
- 1981-10-26 TR TR21882A patent/TR21882A/xx unknown
- 1981-10-26 GB GB8132211A patent/GB2089627A/en not_active Withdrawn
- 1981-10-26 ZA ZA817416A patent/ZA817416B/xx unknown
- 1981-10-26 ES ES507051A patent/ES507051A0/es active Granted
- 1981-10-26 BR BR8106903A patent/BR8106903A/pt unknown
- 1981-10-26 AU AU76816/81A patent/AU7681681A/en not_active Abandoned
- 1981-10-26 NO NO813605A patent/NO813605L/no unknown
- 1981-10-26 DE DE19813142369 patent/DE3142369A1/de not_active Withdrawn
- 1981-10-26 DK DK471681A patent/DK471681A/da not_active Application Discontinuation
- 1981-10-26 PT PT73882A patent/PT73882B/pt unknown
Patent Citations (5)
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 (fr) * | 1978-10-18 | 1981-04-22 | Fuchs Systemtechnik GmbH | Support refroidi par un liquide pour l'extrémité d'une électrode |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0056862A2 (fr) * | 1981-01-28 | 1982-08-04 | Arc Technologies Systems, Ltd. | Electrode pour four à arc |
EP0056862A3 (fr) * | 1981-01-28 | 1982-10-20 | Arc Technologies Systems, Ltd. | Electrode pour four à arc |
Also Published As
Publication number | Publication date |
---|---|
GR78058B (fr) | 1984-09-26 |
YU255481A (en) | 1983-12-31 |
DK471681A (da) | 1982-04-28 |
NZ198753A (en) | 1984-10-19 |
PL232708A1 (fr) | 1982-06-21 |
FI813340L (fi) | 1982-04-28 |
IN156476B (fr) | 1985-08-10 |
ZA817416B (en) | 1983-03-30 |
DD201835A5 (de) | 1983-08-10 |
GB2089627A (en) | 1982-06-23 |
TR21882A (tr) | 1985-10-03 |
NZ198754A (en) | 1985-04-30 |
JPS5776787A (en) | 1982-05-13 |
ES8302995A1 (es) | 1982-12-01 |
ES507051A0 (es) | 1982-12-01 |
AU7681681A (en) | 1982-05-06 |
PT73882B (en) | 1983-01-25 |
DE3142369A1 (de) | 1982-09-23 |
PT73882A (en) | 1981-11-01 |
NO813605L (no) | 1982-04-28 |
BR8106903A (pt) | 1982-07-13 |
US4425657A (en) | 1984-01-10 |
CA1168684A (fr) | 1984-06-05 |
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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. |