EP0167475A1 - Direct current arc heating device - Google Patents
Direct current arc heating device Download PDFInfo
- Publication number
- EP0167475A1 EP0167475A1 EP85730024A EP85730024A EP0167475A1 EP 0167475 A1 EP0167475 A1 EP 0167475A1 EP 85730024 A EP85730024 A EP 85730024A EP 85730024 A EP85730024 A EP 85730024A EP 0167475 A1 EP0167475 A1 EP 0167475A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating device
- electrode
- vessel
- metal electrode
- melting material
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000009847 ladle furnace Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract 7
- 238000002844 melting Methods 0.000 claims abstract 7
- 238000010891 electric arc Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- H05B7/06—Electrodes
-
- 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
Definitions
- the contact electrode and the graphite electrode can easily be removed from the vessel and used for another interchangeable vessel.
- the process of the metallurgical process can thus be accelerated without increasing costs.
- the radiation exposure of the ff material is significantly reduced by the arrangement of the electrodes according to the invention. Operating costs are reduced due to smaller electrode consumption.
- the device is also suitable for vacuum processes and processes with protective gas cover.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Discharge Heating (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Gleichstrom-Lichtbogen-Heizvorrichtung, insbesondere Pfanne oder Pfannenofen, mit mindestens einer aufzehrenden, mit dem im Gefäß befindlichen Schmelzgut in Kontakt stehenden Metallelektrode (3) sowie einer über dem Schmelzgut höhenverstellbar angeordneten Graphit-Elektrode, wobei zwischen der Graphit-Elektrode und dem Schmelzgut ein Lichtbogen entwickelt wird. Die Metallelektrode (3) (Metallektroden) ist (sind) in einer oberhalb des Gefässes (1) vorgesehenen Haltevorrichtung nachführbar angeordnet.Direct-current arc heating device, in particular pan or ladle furnace, with at least one consumable metal electrode (3) which is in contact with the melting material in the vessel and a graphite electrode which is arranged to be height-adjustable above the melting material, with an interposed between the graphite electrode and the melting material Arc is developed. The metal electrode (3) (metal electrodes) is (are) arranged in a holding device provided above the vessel (1).
Description
Die Erfindung betrifft eine Heizvorrichtung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a heating device according to the preamble of claim 1.
Bei Öfen dieser Art Ist üblicherweise eine Graphitelektrode als Kathode geschaltet, während die Kontaktelektroden als Anoden arbeiten.In furnaces of this type, a graphite electrode is usually connected as the cathode, while the contact electrodes work as anodes.
Aus der DE-OS 31 07 454 ist ein Pfannenofen für Gleichstrom bekannt, der eine als Kathode arbeitende Lichtbogenelektrode aufweist. In dem bodennahen Bereich des Pfannengefäßes sind Kontaktblöcke aus einem Metall vorgesehen. Die Kontaktblöcke sind an der der Pfannenachsenmitte zugewandten Seite mit feuerfesten Steinen mit leitenden Einlagen versehen.From DE-OS 31 07 454 a ladle furnace for direct current is known which has an arc electrode working as a cathode. Contact blocks made of a metal are provided in the region of the pan vessel near the bottom. The contact blocks are provided with refractory stones with conductive inserts on the side facing the middle of the pan axis.
Durch diese Vorrichtung mit seitlich angeschlossenen Kontaktelektroden sollte der Vorteil erreicht werden, daß der Boden für Bodenabstichlöcher freibleibt. Diese Vorrichtung ist jedoch mit dem Nachteil behaftet, daß bei Verbrauch oder Beschädigung der mit dem Gefäß fest verbundenen Kontaktblöcke die Erneuerungsarbeiten sehr schwierig und aufwendig sind.This device with laterally connected contact electrodes should achieve the advantage that the floor remains free for floor tapping holes. However, this device has the disadvantage that the renewal work is very difficult and expensive when the contact blocks which are firmly connected to the vessel are used or damaged.
Aufgabe der Erfindung ist es, eine Gleichstrom-Lichtbogen-Heizvorrichtung der eingangs genannten Art zu schaffen, deren Kontaktelektroden in vertikaler sowie horizontaler Richtung beweglich sind, wobei die Reparatur- oder Erneuerungsarbeiten an den Elektroden wesentlich leichter als bisher durchführbar sind. Außerdem soll durch die Erfindung ermöglicht werden, die Elektroden für verschiedene wechselbare Gefäße zu benutzen.The object of the invention is to provide a direct-current arc heating device of the type mentioned, the contact electrodes of which can be moved in the vertical and horizontal directions, the repair or renewal work on the electrodes being able to be carried out much more easily than hitherto. In addition, the invention is intended to enable the electrodes to be used for different interchangeable vessels.
Diese Aufgabe wird durcn die Erflndunssmerkmale des Hauptanspruchs gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This task is solved by the invention features of the main claim. Advantageous developments of the invention result from the subclaims.
Nach der Erfindung ist es möglich, die Eintauchtiefe der oberhalb des Gefäßes nachführbar angeordneten Kontaktelektrode nach den Erfordernissen des Betriebes zu regeln.According to the invention, it is possible to regulate the immersion depth of the contact electrode arranged above the vessel according to the requirements of the operation.
Die Kontaktelektrode sowie die Graphitelektrode können leicht aus dem Gefäß entfernt und für ein anderes Wechselgefäß eingesetzt werden. Damit kann der Ablauf des metallurgischen Prozesses ohne Kostensteigerung beschleunigt werden.The contact electrode and the graphite electrode can easily be removed from the vessel and used for another interchangeable vessel. The process of the metallurgical process can thus be accelerated without increasing costs.
Durch die unmittelbare innere Kühlung der Elektrode kann ihre Standzeit wesentlich verlängert werden.Due to the immediate internal cooling of the electrode, its service life can be significantly extended.
Die größte thermische Beanspruchung der Kontaktelektrode entsteht bekanntlich an ihren Kontaktflächen mit dem flüssigen Schmelzbad. Deshalb kann die erfindungsgemäße Elektrode in ihrem unteren, mit der Schlacke in Berührung stehenden Bereich mit einem thermischen Schutz versehen werden.As is well known, the greatest thermal stress on the contact electrode arises at its contact surfaces with the liquid weld pool. The electrode according to the invention can therefore be provided with thermal protection in its lower region which is in contact with the slag.
Durch die erfindungsgenäße Anordnung der Elektroden wird die Strahlungsbelastung des ff-Materials wesentlich vermindert. Durch einen kleineren Elektrodenverbrauch werden die Betriebskosten verringert. Die Vorrichtung Ist auch für Vakuumverfahren sowie Verfahren mit Schutzgasabdeckung geeignet.The radiation exposure of the ff material is significantly reduced by the arrangement of the electrodes according to the invention. Operating costs are reduced due to smaller electrode consumption. The device is also suitable for vacuum processes and processes with protective gas cover.
Die Erfindung wird anhand der beigefügten schematischen Zeichnung näher erläutert.The invention is explained in more detail with reference to the attached schematic drawing.
Über dem Ofengefäß 1 sind eine Graphitelektrode 2 sowie eine Kontaktelektrode 3 aus Metall, in dem gezeichneten Beispiel aus Stahl, an einem gemeinsamen Tragarm 4 befestigt. Die Graphit- elektrode 2 ist in einer Nachsetzvorrichtung 5 verspannt, während die Nachführvorrichtung für die Kontaktelektrode 3 mit 6 bezeichnet ist. Bei den Nachsetzvorrichtungen, die z.B. aus der DE-PS 21 25 773 bekannt sind, handelt es sich um gängige Ausführungen.A graphite electrode 2 and a contact electrode 3 made of metal, in the illustrated example made of steel, are fastened to a
In einer anderen, nicht dargestellten Ausführung können für die Graphit-Elektrode 2 und für die Kontaktelektrode 3 getrennte Tragarme vorgesehen werden.In another embodiment, not shown, separate support arms can be provided for the graphite electrode 2 and for the contact electrode 3.
Der Tragarm 4 ist mit einer positionsgeregelten Führungssäule 7 fest verbunden und somit samt beider Elektroden mit Hilfe des hydraulischen Zylinders 8 höhenverstellbar.The
Zum Wechsel der Pfanne können beide Elektroden angehoben und aus dem Gefäß entfernt werden.To change the pan, both electrodes can be raised and removed from the vessel.
Die Graphitelektrode 2 wird so geregelt, daß der Lichtbogenofen aufrechterhalten bleibt.The graphite electrode 2 is controlled so that the arc furnace is maintained.
Die Kontaktelektrode 2 taucht in die Schmelze 10 ein. Die Nachführvorrichtung 6 sorgt dafür, daß ein ausreichender Kontakt mit der Schmelze 10 gewährleistet wird.The contact electrode 2 is immersed in the
Mit 11 ist die Schlackenschicht bezeichnet.The slag layer is designated by 11.
In dem dargestellten Beispiel besitzt die Kontaktelektrode 3 axiale Bohrungen 12, die eine intensive Kühlung (z.B. durch Kühlgase, wie Argon) der Elektrode ermöglichen.In the example shown, the contact electrode 3 has
Die Heizvorrichtung kann sowohl stationär als auch auf einem Pfannentransportwagen betrieben werden.The heater can be operated both stationary and on a ladle trolley.
Claims (7)
dadurch gekennzeichnet,
daß die Metallelektrode (3) (Metallelektroden) in einer oberhalb des Gefäßes (1) vorgesehenen Haltevorrichtung nachführbar angeordnet ist (sind).1. DC electric arc heating device, in particular pan or ladle furnace, with at least one consumable metal electrode which is in contact with the melting material in the vessel and a graphite electrode which is vertically adjustable above the melting material, an arc being developed between the graphite electrode and the melting material becomes,
characterized,
that the metal electrode (3) (metal electrodes) is (are) arranged in a holding device provided above the vessel (1).
dadurch gekennzeichnet,
daß die Haltevorrichtung ein mit einer parallel zur Gefäßachse angeordneten Führungssäule (7) verbundener Tragarm (4) ist.2. Heating device according to claim 1,
characterized,
that the holding device is a support arm (4) connected to a guide column (7) arranged parallel to the vessel axis.
dadurch gekennzeichnet,
daß am Tragarm (4) eine Nachführvorrichtung (6) für die Metallelektrode (3) angeordnet ist.3. Heater according to claim 2,
characterized,
that a tracking device (6) for the metal electrode (3) is arranged on the support arm (4).
dadurch gekennzeichnet,
daß die Nachführvorrichtung (6) mit einer der Abschmelzgeschwindigkeit entsprechend arbeitenden Steuervorrichtung steuerbar ist.4. Heating device according to claim 3,
characterized,
that the tracking device (6) can be controlled with a control device operating in accordance with the melting speed.
dadurch gekennzeichnet,
daß die Metallelektrode (3) sowie die Graphit-Elektrode (2) in einem einzigen gemeinsamen Tragann (4) angeordnet sind.5. Heating device according to claims 1 to 4,
characterized,
that the metal electrode (3) and the graphite electrode (2) are arranged in a single common carrier (4).
dadurch gekennzeichnet,
daß der mit der Führungssäule (7) verbundene Tragarm (4) auf einem verfahrbaren Gestell angeordnet ist.6. Heating device according to claim 5,
characterized,
that the support arm (4) connected to the guide column (7) is arranged on a movable frame.
dadurch gekennzeichnet,
daß die Metallelektrode (3) kühlbar ausgeführt ist.7. Heating device according to claims 1 to 6,
characterized,
that the metal electrode (3) is coolable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843419681 DE3419681A1 (en) | 1984-05-24 | 1984-05-24 | DC CURRENT ARC HEATING DEVICE |
| DE3419681 | 1984-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0167475A1 true EP0167475A1 (en) | 1986-01-08 |
| EP0167475B1 EP0167475B1 (en) | 1989-12-27 |
Family
ID=6236920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85730024A Expired EP0167475B1 (en) | 1984-05-24 | 1985-02-18 | Direct current arc heating device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4646318A (en) |
| EP (1) | EP0167475B1 (en) |
| JP (1) | JPS60254592A (en) |
| BR (1) | BR8502426A (en) |
| DE (2) | DE3419681A1 (en) |
| DK (1) | DK163402C (en) |
| ES (1) | ES295801Y (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964114A (en) * | 1986-11-26 | 1990-10-16 | Mannesmann Ag | Electrode positioning mechanism |
| DE3808683C1 (en) * | 1988-03-11 | 1989-09-07 | Mannesmann Ag, 4000 Duesseldorf, De | |
| JP2794774B2 (en) * | 1989-05-09 | 1998-09-10 | 大同特殊鋼株式会社 | Operation method of DC arc furnace |
| DE4108583C2 (en) * | 1991-03-14 | 1997-06-05 | Mannesmann Ag | Device for coupling the power supply to a metallurgical vessel |
| US5539768A (en) * | 1995-03-21 | 1996-07-23 | Ltv Steel Company, Inc. | Electric arc furnace electrode consumption analyzer |
| MX2012006010A (en) * | 2009-11-25 | 2013-01-29 | Fundacion Tecnalia Res & Innovation | Inoculation procedure and device. |
| JPWO2011096170A1 (en) * | 2010-02-08 | 2013-06-10 | 株式会社大紀アルミニウム工業所 | Aluminum purification method and apparatus |
| CN114477736B (en) * | 2022-03-25 | 2023-10-10 | 锦州佑鑫石英科技有限公司 | Manufacturing method of high-quality quartz crucible |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1333950A (en) * | 1916-03-24 | 1920-03-16 | Ludlum Electric Furnace Corp | Electric furnace |
| FR846004A (en) * | 1939-09-07 | |||
| US3709997A (en) * | 1970-12-20 | 1973-01-09 | J Alferov | Convertible electrode electric furnace installation and method |
| FR2197988A1 (en) * | 1972-08-29 | 1974-03-29 | Nipkti Po Cherna Metalurgia | |
| DE2355168A1 (en) * | 1972-11-17 | 1974-05-30 | Allmaenna Svenska Elek Ska Ab | MELTING PROCESS FOR ARC FURNACE USING DC CURRENT AND ARC FURNACE FOR PERFORMING THE PROCESS |
| DE3232551A1 (en) * | 1981-12-01 | 1983-06-09 | Iso "Metalurgkomplekt", Sofija | METHOD AND DEVICE FOR TREATING AND REFINING LIQUID METAL ALLOYS BY MEANS OF DC-ARC HEATING |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3612740A (en) * | 1968-01-08 | 1971-10-12 | Huta Zabrze | Arrangement for production of metal alloys steel alloys in particular |
| US3612739A (en) * | 1970-02-05 | 1971-10-12 | Simon M Korneff | Dual electric furnace facility |
| DE2125773C3 (en) * | 1971-05-25 | 1979-12-20 | Demag Ag, 4100 Duisburg | Deep electrode holder for electric arc and reduction furnaces |
| SE376634C (en) * | 1972-05-02 | 1985-10-28 | Nipkti Cherna Metalurgia | SET TO MANUFACTURE STEEL MEDIUM DC AND OVEN FOR IMPLEMENTATION OF THE SET |
| SE382828B (en) * | 1974-06-24 | 1976-02-16 | Asea Ab | METHOD OF MANUFACTURING STEEL IN THE DIAMOND LIGHT BACK OVEN AND THE DIAM LIGHT BACK OVEN FOR IMPLEMENTING THE KIT |
| GB1504443A (en) * | 1975-04-25 | 1978-03-22 | Dso Cherna Metalurgia | Method of steelmaking with direct current |
| US4132545A (en) * | 1975-12-08 | 1979-01-02 | Rabinovich Volf I | Method of electroslag remelting processes using a preheated electrode shield |
| SE435548B (en) * | 1980-03-10 | 1984-10-01 | Asea Ab | DISTRIBUTION OF DRAWERS OR DRAWINGS FOR DIRECTLY WITH AT LEAST ONE LIGHT BACK ELECTRODE |
| DE3406760A1 (en) * | 1984-02-24 | 1985-09-05 | C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach | METHOD AND DEVICE FOR MELTING AND HEATING MATERIALS |
-
1984
- 1984-05-24 DE DE19843419681 patent/DE3419681A1/en active Granted
-
1985
- 1985-02-18 DE DE8585730024T patent/DE3575065D1/en not_active Expired - Fee Related
- 1985-02-18 EP EP85730024A patent/EP0167475B1/en not_active Expired
- 1985-03-11 ES ES1985295801U patent/ES295801Y/en not_active Expired
- 1985-05-21 JP JP60109203A patent/JPS60254592A/en active Granted
- 1985-05-23 BR BR8502426A patent/BR8502426A/en not_active IP Right Cessation
- 1985-05-23 DK DK229585A patent/DK163402C/en not_active IP Right Cessation
- 1985-05-24 US US06/737,415 patent/US4646318A/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR846004A (en) * | 1939-09-07 | |||
| US1333950A (en) * | 1916-03-24 | 1920-03-16 | Ludlum Electric Furnace Corp | Electric furnace |
| US3709997A (en) * | 1970-12-20 | 1973-01-09 | J Alferov | Convertible electrode electric furnace installation and method |
| FR2197988A1 (en) * | 1972-08-29 | 1974-03-29 | Nipkti Po Cherna Metalurgia | |
| DE2355168A1 (en) * | 1972-11-17 | 1974-05-30 | Allmaenna Svenska Elek Ska Ab | MELTING PROCESS FOR ARC FURNACE USING DC CURRENT AND ARC FURNACE FOR PERFORMING THE PROCESS |
| DE3232551A1 (en) * | 1981-12-01 | 1983-06-09 | Iso "Metalurgkomplekt", Sofija | METHOD AND DEVICE FOR TREATING AND REFINING LIQUID METAL ALLOYS BY MEANS OF DC-ARC HEATING |
Also Published As
| Publication number | Publication date |
|---|---|
| DK229585A (en) | 1985-11-25 |
| US4646318A (en) | 1987-02-24 |
| DE3419681C2 (en) | 1989-09-28 |
| JPH0123916B2 (en) | 1989-05-09 |
| DK229585D0 (en) | 1985-05-23 |
| ES295801U (en) | 1987-06-16 |
| BR8502426A (en) | 1986-01-28 |
| ES295801Y (en) | 1987-12-16 |
| DE3419681A1 (en) | 1985-11-28 |
| EP0167475B1 (en) | 1989-12-27 |
| DK163402B (en) | 1992-02-24 |
| JPS60254592A (en) | 1985-12-16 |
| DE3575065D1 (en) | 1990-02-01 |
| DK163402C (en) | 1992-07-13 |
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