EP0093070A1 - Dichtungssystem für Elektroden - Google Patents

Dichtungssystem für Elektroden Download PDF

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Publication number
EP0093070A1
EP0093070A1 EP83630066A EP83630066A EP0093070A1 EP 0093070 A1 EP0093070 A1 EP 0093070A1 EP 83630066 A EP83630066 A EP 83630066A EP 83630066 A EP83630066 A EP 83630066A EP 0093070 A1 EP0093070 A1 EP 0093070A1
Authority
EP
European Patent Office
Prior art keywords
electrode
sealing system
furnace
stuffing
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.)
Granted
Application number
EP83630066A
Other languages
English (en)
French (fr)
Other versions
EP0093070B1 (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 have 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 the evolution of gas from the molten materials.
  • the normally adopted solution provides an etano bell which covers the electrodes with their suspension, drive and power supply systems and makes it difficult to use a classic electrode holder.
  • the object of the present invention is to eliminate this disadvantage, and to propose a sealing system which makes the oven watertight at the place where the electrodes penetrate the furnace and which is capable of adapting to electrodes produced with high tolerances and having pronounced irregularities.
  • the system according to the invention which comprises, at the point of penetration of the electrode into the oven, a stuffing, resistant to high temperatures, preferably based on carbon fibers or graphite, tightened by a press.
  • a stuffing resistant to high temperatures, preferably based on carbon fibers or graphite, tightened by a press.
  • -throat surrounding the eléotrode, a chamber, maintained at a pressure higher than that of the external atmosphere of the furnace, surrounding the electrode and located between said packing and the interior volume of the furnace, and a cooling device surrounding at least in part said chamber, the electrode and the stuffing.
  • 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.
  • 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.
  • an electrode 1 at the point of penetration into the oven.
  • the tightness of the oven at this location is obtained by mounting an adequate packing 2 which is maintained by a stuffing box ar elements 3, 4 and 5.
  • the stuffing 2 is constituted in the case resent by two carbon fiber rings with offset joints.
  • the cable gland is wired using the bolts 6. Part 5 of the cable gland is seated in a cooling ring 7. The seal between these two elements is guaranteed by one or two anointed 0 indicated on the fig. 1 with reference 8.
  • Cooling panel 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 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 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.l.
  • 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 further from the axis of the electrode than its tilting axis so that it is pushed towards the electrode by its own weight.
  • This solution has the advantage of allowing these segments to best match the shape of the electrode without preventing a slight misalignment thereof.
  • an electrode mounted slightly oblique to its theoretical axis 26, does not come into contact with parts of the furnace which are not intended to guide it and keep it in position, it is advantageous to provide cleats 27 which limit the tilting angle of the segments 24.
  • the electrode is held, on the one hand, by the electrode-carrying arm and, on the other hand, by the ring 23, such as the angle between the effective axis and the theoretical axis of the elentrode may not exceed a determined maximum value.
  • 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.
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 true EP0093070A1 (de) 1983-11-02
EP0093070B1 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
GB2324595A (en) * 1997-04-22 1998-10-28 Howard Ind Pipework Services L Mounting electrodes in electric arc furnaces

Families Citing this family (14)

* 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
DE4342511C2 (de) * 1993-12-08 1996-02-08 Mannesmann Ag Elektroinduktionsofen mit vertikal bewegbarem Rahmen
US5406580A (en) * 1993-12-23 1995-04-11 Hatch Associates Ltd. Electrode seal for arc furnaces
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
WO2010138494A1 (en) * 2009-05-26 2010-12-02 Inentec Llc Regenerator for syngas cleanup and energy recovery in gasifier systems
FI122225B (fi) * 2009-08-04 2011-10-14 Outotec Oyj Tiivistyslaite
EP3397405B1 (de) * 2015-12-29 2020-07-08 Kurion, Inc. Vitrifizierungssystem und -verfahren mit einer elektrodendichtungsanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1096626A (en) * 1964-03-17 1967-12-29 United Coke & Chemicals Compan Dust seals for arc furnaces
US3634588A (en) * 1970-05-28 1972-01-11 Toledo Engineering Co Inc Electric glass furnace
US3697660A (en) * 1970-03-16 1972-10-10 Jury Fedorovich Frolov Device for sealing gap between electrode and lining of electric arc furnace
DE2125773A1 (de) * 1971-05-25 1972-12-07 Demag Ag Einrichtung zum Kühlen von Bestandteilen offener elektrischer Lichtbogen- und Reduktionsofen
US3709506A (en) * 1970-11-12 1973-01-09 Quebec Iron & Titanium Corp Furnace electrode seal

Family Cites Families (4)

* 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
US4377289A (en) * 1980-04-22 1983-03-22 Qit-Fer Et Titane Inc. Furnace electrode seal assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2125773A1 (de) * 1971-05-25 1972-12-07 Demag Ag Einrichtung zum Kühlen von Bestandteilen offener elektrischer Lichtbogen- und Reduktionsofen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324595A (en) * 1997-04-22 1998-10-28 Howard Ind Pipework Services L Mounting electrodes in electric arc furnaces
GB2324595B (en) * 1997-04-22 1999-03-10 Howard Ind Pipework Services L Economiser for electric arc furnace

Also Published As

Publication number Publication date
FI830435A0 (fi) 1983-02-08
FI830435L (fi) 1983-10-23
DE3376731D1 (en) 1988-06-23
CA1231997A (fr) 1988-01-26
FI76473B (fi) 1988-06-30
NO831416L (no) 1983-10-24
NO159317B (no) 1988-09-05
EP0093070B1 (de) 1988-05-18
DK76583A (da) 1983-10-23
JPS58188092A (ja) 1983-11-02
DK76583D0 (da) 1983-02-22
NO159317C (no) 1988-12-14
US4457002A (en) 1984-06-26
LU84104A1 (fr) 1984-03-02
FI76473C (fi) 1988-10-10
ATE34501T1 (de) 1988-06-15

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