EP0093070A1 - Dichtungssystem für Elektroden - Google Patents
Dichtungssystem für Elektroden Download PDFInfo
- 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
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
- H05B7/12—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.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Furnace Details (AREA)
- Discharge Heating (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Organic Insulating Materials (AREA)
- Secondary Cells (AREA)
- Luminescent Compositions (AREA)
- Polysaccharides And Polysaccharide Derivatives (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)
- Sealing Devices (AREA)
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)
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 (15)
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 |
US9057032B2 (en) | 2009-05-26 | 2015-06-16 | Inentec Inc. | High pressure gasifier system using electrically assisted heating |
FI122225B (fi) * | 2009-08-04 | 2011-10-14 | Outotec Oyj | Tiivistyslaite |
US10449581B2 (en) * | 2015-12-29 | 2019-10-22 | 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 |
Citations (5)
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)
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 |
-
1982
- 1982-04-22 LU LU84104A patent/LU84104A1/fr unknown
-
1983
- 1983-01-28 CA CA000420528A patent/CA1231997A/fr not_active Expired
- 1983-02-08 FI FI830435A patent/FI76473C/fi not_active IP Right Cessation
- 1983-02-22 DK DK76583A patent/DK76583A/da not_active Application Discontinuation
- 1983-04-13 JP JP58063836A patent/JPS58188092A/ja active Pending
- 1983-04-18 AT AT83630066T patent/ATE34501T1/de not_active IP Right Cessation
- 1983-04-18 EP EP83630066A patent/EP0093070B1/de not_active Expired
- 1983-04-18 DE DE8383630066T patent/DE3376731D1/de not_active Expired
- 1983-04-20 US US06/486,842 patent/US4457002A/en not_active Expired - Fee Related
- 1983-04-21 NO NO831416A patent/NO159317C/no unknown
Patent Citations (5)
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)
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 |
---|---|
DK76583A (da) | 1983-10-23 |
DE3376731D1 (en) | 1988-06-23 |
NO159317B (no) | 1988-09-05 |
NO159317C (no) | 1988-12-14 |
FI76473B (fi) | 1988-06-30 |
EP0093070B1 (de) | 1988-05-18 |
ATE34501T1 (de) | 1988-06-15 |
FI76473C (fi) | 1988-10-10 |
NO831416L (no) | 1983-10-24 |
FI830435L (fi) | 1983-10-23 |
CA1231997A (fr) | 1988-01-26 |
JPS58188092A (ja) | 1983-11-02 |
FI830435A0 (fi) | 1983-02-08 |
DK76583D0 (da) | 1983-02-22 |
US4457002A (en) | 1984-06-26 |
LU84104A1 (fr) | 1984-03-02 |
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