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EP0093070B1 - Dichtungssystem für Elektroden - Google Patents

Dichtungssystem für Elektroden Download PDF

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Publication number
EP0093070B1
EP0093070B1 EP83630066A EP83630066A EP0093070B1 EP 0093070 B1 EP0093070 B1 EP 0093070B1 EP 83630066 A EP83630066 A EP 83630066A EP 83630066 A EP83630066 A EP 83630066A EP 0093070 B1 EP0093070 B1 EP 0093070B1
Authority
EP
European Patent Office
Prior art keywords
electrode
packing
sealing system
furnace
seal ring
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.)
Expired
Application number
EP83630066A
Other languages
English (en)
French (fr)
Other versions
EP0093070A1 (de
Inventor
Georges Mathgen
Robert Scherer
Charles Prüm
Roger Leick
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Priority to AT83630066T priority Critical patent/ATE34501T1/de
Publication of EP0093070A1 publication Critical patent/EP0093070A1/de
Application granted granted Critical
Publication of EP0093070B1 publication Critical patent/EP0093070B1/de
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
    • H05B7/12—Arrangements for cooling, sealing or protecting electrodes

Definitions

  • the present invention relates to a sealing system for electrodes, in particular on an electric furnace with graphite electrodes working under a controlled atmosphere.
  • a furnace operating in a controlled atmosphere is preferably constructed so as to present a single gas exhaust duct in which an adjustable shutter device is normally installed, eg a valve or a butterfly valve which allows the adjustment of the pressure, independently of the gas insufflation flow rate in the furnace and of the evolution of gas from the molten materials.
  • the normally adopted solution provides a sealed bell which covers the electrodes with their suspension, drive and electrical supply systems and making it difficult to use a classic electrode holder.
  • the object of the present invention is to eliminate the disadvantages set out above and to provide a sealing system which makes the oven watertight at the place where the electrode enters the oven and which is capable of adapting to electrodes. performed with high tolerances and having pronounced irregularities.
  • the major advantage of the solution proposed by the present invention lies in the fact that the electrodes can be replaced quickly when hot without risking damage to the mechanical elements of the electrode drive system.
  • the spacing between these elements and the electrode may correspond to a distance representing several times the diameter of an electrode. It also creates the possibility of holding the electrodes by electrode arms of conventional construction, which is practically impossible in known systems.
  • the production downtime of the oven is minimal since the electrodes can be removed without having to wait for them to cool and with the minimum of maneuvers necessary to free the electrode from its claw and the seal where it enters the oven.
  • FIG. 1 shows one of the possible executions.
  • an electrode 1 at the point of penetration into the oven.
  • the tightness of the oven at this location is obtained by mounting a suitable packing 2 which is maintained by a stuffing box constituted by the elements 3, 4 and 5.
  • the packing 2 is constituted in the present case by two rings in carbon fibers with offset joints.
  • the cable gland is tightened using bolts 6. Part 5 of the cable gland sits in a cooling ring 7.
  • the seal between these two elements is guaranteed by one or two 0-seals indicated on fig. 1 by reference 8.
  • the cable gland is fixed to the cooling ring 7 using keys 9 passing through the support pins 10.
  • the cool ring 7 is itself mounted on an insulating ring 11. It is held by the bolts 12, themselves electrically insulated using the insulating rings 13. These bolts 12 attach all of the rings of the electrode to the plate 14, preferably made of steel, which constitutes the wall of separation between the furnace atmosphere and the open air. The seal between the last rings described is also achieved using 0 seals identified by the reference 15.
  • the metal plate 14 is itself protected against the heat of the oven, preferably by a mat of ceramic fibers 16.
  • a metal ring in 4 parts 17, is mounted below the elements 3, 4 and 5 constituting the cable gland. It will serve to maintain a minimum seal between the space 18 and the interior of the oven.
  • the space 18 will therefore have the function of an airlock which will preferably be kept under pressure by the injection of an inert gas (such as nitrogen), through the orifice 19 in the case of FIG. 1.
  • an inert gas such as nitrogen
  • This sheath 20 will preferably be cylindrical and concentric with the electrode. In the present case, it consists of two concentric cylindrical sleeves between which passes a spiral which serves to guide the cooling water supplied by line 21 and discharged through line 22.
  • a third ring 23 around the electrode 1 protects the upper rings against radiation from inside the oven.
  • This ring 23 consists of several segments 24, six in this case, which pivot about axes 25 to which they are suspended. The center of gravity of each segment will be farther from the axis of the electrode than its tilt axis so that it is pushed towards the electrode by its own weight.
  • This solution has the advantage of allowing these segments to best dust the shape of the sand electrode to prevent slight misalignment thereof.
  • the ring 23 we will in fact be able to limit the lateral movement of the electrode inside the packing, this in order to guarantee the effectiveness of -this and in order to reduce its wear following the vertical movement of the electrode.
  • the rings 3, 4 and 5 constituting the cable gland are each split into two equal halves in the direction of the axis of the electrode. They will however be mounted so that the axis of the cut is moved from one ring to the other, which means that the cable gland assembled with the bolts 6 forms a practically rigid whole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Furnace Details (AREA)
  • Discharge Heating (AREA)
  • Organic Insulating Materials (AREA)
  • Secondary Cells (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Luminescent Compositions (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Sealing Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Sealing Material Composition (AREA)

Claims (9)

1. Dichtungssystem für Elektroden (1), insbesondere für über einem unter geregelter Atmosphäre arbeitenden Elektroofen angebrachte Elektroden, begreifend an der Einführungsstelle der Elektrode (1) in den Ofen, eine die Elektrode (1) umgebende gepresste Dichtung (2), eine mit Druckgas beaufschlagte Kammer (18) welche die Elektrode (1) umgibt und zwischen der genannten Dichtung und dem Inneren des Ofens angebracht ist, sowie Kühlvorrichtungen in unmittelbarer Nähe der genannten Kammer (18), der Elektrode (1) und der Dichtung (2), dadurch gekennzeichnet, dass
die Dichtung (2) eingefasst ist in einer Stopfbüchse bestehend aus ringförmigen Teilen (3, 4, 5), Spannvorrichtungen (6) zum Pressen der Dichtung (2) im Innern der Stopfbüchse (3, 4, 5), wobei letztere schlüssig von einem ringförmigen Kühlelement (7) umgeben ist,
die mit Druckgas beaufschlagte Kammer (18) im wesentlichen begrenzt wird durch die Dichtung (2), den Elektrodenkörper (1), eine zu den Kühlvorrichtungen gehörenden Wand sowie, zur Ofenseite hin, durch einen aus wenigstens zwei Teilen bestehenden und sich gegen die Elektrode abstützenden metallischen Ring (17),
die Kühlvorrichtungen, ausser dem die Dichtung (2) umgebenden Ring (7), ebenfalls eine die Elektrode umgebende Ummantelung (20) begreifen, wobei die genannte Ummantelung zwischen der genannten Kammer (18) und dem aktiven Teil der Elektrode angebracht ist und, dass
ein die Elektrode (1) nahezu vollständig umgebender und aus wenigstens zwei Segmenten (24) bestehender Ring (23) zwischen dem aktiven Teil der Elektrode (1) und der genannten Ummantelung (20) angebracht ist.
2. Dichtungssystem gemäss Anspruch 1, dadurch gekennzeichnete dass die Dichtung (2) aus zwei übereinander liegenden Ringen besteht, die sich gegen die Elektrode (1) abstützen.
3. Dichtungssystem gemäss den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass die Dichtung (2) teilweise aus Kohlenstoff- oder Graphitfasern besteht.
4. Dichtungssystem gemäss einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jeder der Ringe (3,4,5) der Stopfbüchse in der Richtung der Elektrodenachse in zwei vorzugsweise gleiche Teile getrennt ist.
5. Dichtungssystem gemäss Anspruch 4, dadurch gekennzeichnet, dass die Spannvorrichtungen (6) aus Gewindebolzen bestehen.
6. Dichtungssystem gemäss Anspruch 1, dadurch gekennzeichnet, dass die Ummantelung (20) aus zwei konzentrischen zylindrischen Büchsen besteht, zwischen denen eine zur Führung des Kühlmediums dienende Spirale angebracht ist.
7. Dichtungssystem gemäss Anspruch 1, dadurch gekennzeichnet, dass jedes Segment (24) um eine Achse (25) schwenken kann und einen von der Schwenkachse unterschiedlichen Schwerpunkt aufweist, wobei der Schwerpunkt der Segmente (24) weiter von der theoretischen Achse der Elektrode (1) entfernt ist als die genannte Schwenkachse.
8. Dichtungssystem gemäss Anspruch 7, dadurch gekennzeichnet, dass es sechs Segmente (24) besitzt.
9. Dichtungssystem gemäss Anspruch 7, dadurch gekennzeichnet, dass Anschläge (27) den Schwenkelwinkel der Segmente (24) begrenzen.
EP83630066A 1982-04-22 1983-04-18 Dichtungssystem für Elektroden Expired EP0093070B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630066T ATE34501T1 (de) 1982-04-22 1983-04-18 Dichtungssystem fuer elektroden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84104A LU84104A1 (fr) 1982-04-22 1982-04-22 Systeme d'etoupage pour electrodes
LU84104 1982-04-22

Publications (2)

Publication Number Publication Date
EP0093070A1 EP0093070A1 (de) 1983-11-02
EP0093070B1 true EP0093070B1 (de) 1988-05-18

Family

ID=19729867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630066A Expired EP0093070B1 (de) 1982-04-22 1983-04-18 Dichtungssystem für Elektroden

Country Status (10)

Country Link
US (1) US4457002A (de)
EP (1) EP0093070B1 (de)
JP (1) JPS58188092A (de)
AT (1) ATE34501T1 (de)
CA (1) CA1231997A (de)
DE (1) DE3376731D1 (de)
DK (1) DK76583A (de)
FI (1) FI76473C (de)
LU (1) LU84104A1 (de)
NO (1) NO159317C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342511A1 (de) * 1993-12-08 1995-06-14 Mannesmann Ag Elektro-Reduktionsofen mit offenem Schlackebad

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4756813A (en) * 1986-10-24 1988-07-12 Stanley Earl K Self-baking electrode
US4759032A (en) * 1987-06-03 1988-07-19 Monsanto Company Electrode seal assembly
FR2658277B1 (fr) * 1990-02-09 1992-04-30 Siderurgie Fse Inst Rech Recipient metallurgique equipe d'au moins une electrode traversant sa paroi.
US5225169A (en) * 1991-04-23 1993-07-06 Coastal Catalyst Technology, Inc. Reduced heat loss sulfider
US5406580A (en) * 1993-12-23 1995-04-11 Hatch Associates Ltd. Electrode seal for arc furnaces
GB2324595B (en) * 1997-04-22 1999-03-10 Howard Ind Pipework Services L Economiser for electric arc furnace
US6003879A (en) * 1998-02-17 1999-12-21 Stelco Inc. Seal for steel furnace emissions
US6018542A (en) * 1999-01-06 2000-01-25 Integrated Environmental Technologies, Llc Sealed electrode feeding assembly
US6377605B1 (en) * 2001-03-02 2002-04-23 Hatch Associates Ltd. Electrode seal for arc furnace
FI118439B (fi) * 2005-04-29 2007-11-15 Outotec Oyj Valokaariuunin kannen sähköinen eristys
FI123373B (fi) * 2008-06-06 2013-03-15 Outotec Oyj Tiivistyslaite
US8613782B2 (en) * 2009-05-26 2013-12-24 Inentec Inc. Regenerator for syngas cleanup and energy recovery in gasifier systems
FI122225B (fi) * 2009-08-04 2011-10-14 Outotec Oyj Tiivistyslaite
CA3008172C (en) 2015-12-29 2023-08-22 Kurion, Inc. System and method for an electrode seal assembly
CN111578719B (zh) * 2020-06-16 2024-05-14 中冶赛迪工程技术股份有限公司 电炉电极密封装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA463414A (en) * 1950-02-28 Delaware Engineering Corporation Electrode gland
US2243096A (en) * 1939-06-29 1941-05-27 Stanford A Hardin Electrode seal
US2979550A (en) * 1959-03-13 1961-04-11 Tennessee Products And Chemica Electrode seal
GB1096626A (en) * 1964-03-17 1967-12-29 United Coke & Chemicals Compan Dust seals for arc furnaces
US3697660A (en) * 1970-03-16 1972-10-10 Jury Fedorovich Frolov Device for sealing gap between electrode and lining of electric arc furnace
US3634588A (en) * 1970-05-28 1972-01-11 Toledo Engineering Co Inc Electric glass furnace
US3709506A (en) * 1970-11-12 1973-01-09 Quebec Iron & Titanium Corp Furnace electrode seal
DE2125773C3 (de) * 1971-05-25 1979-12-20 Demag Ag, 4100 Duisburg Elektroden-Tieffassung für Lichtbogen- bzw. Reduktionsöfen
US4377289A (en) * 1980-04-22 1983-03-22 Qit-Fer Et Titane Inc. Furnace electrode seal assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342511A1 (de) * 1993-12-08 1995-06-14 Mannesmann Ag Elektro-Reduktionsofen mit offenem Schlackebad

Also Published As

Publication number Publication date
FI76473B (fi) 1988-06-30
JPS58188092A (ja) 1983-11-02
LU84104A1 (fr) 1984-03-02
FI830435L (fi) 1983-10-23
NO159317B (no) 1988-09-05
CA1231997A (fr) 1988-01-26
DE3376731D1 (en) 1988-06-23
US4457002A (en) 1984-06-26
FI830435A0 (fi) 1983-02-08
ATE34501T1 (de) 1988-06-15
DK76583D0 (da) 1983-02-22
NO831416L (no) 1983-10-24
FI76473C (fi) 1988-10-10
NO159317C (no) 1988-12-14
DK76583A (da) 1983-10-23
EP0093070A1 (de) 1983-11-02

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