EP0344092B1 - Thermal treatment installation for molten metal - Google Patents

Thermal treatment installation for molten metal Download PDF

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Publication number
EP0344092B1
EP0344092B1 EP89730089A EP89730089A EP0344092B1 EP 0344092 B1 EP0344092 B1 EP 0344092B1 EP 89730089 A EP89730089 A EP 89730089A EP 89730089 A EP89730089 A EP 89730089A EP 0344092 B1 EP0344092 B1 EP 0344092B1
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EP
European Patent Office
Prior art keywords
counter
metallurgical vessel
electrode
contact
contact surface
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 - Lifetime
Application number
EP89730089A
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German (de)
French (fr)
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EP0344092A2 (en
EP0344092A3 (en
Inventor
Eckart Schunk
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Filing date
Publication date
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Publication of EP0344092A2 publication Critical patent/EP0344092A2/en
Publication of EP0344092A3 publication Critical patent/EP0344092A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • F27D11/10—Disposition of 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
    • H05B7/06—Electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle

Definitions

  • the invention relates to a device for the thermal treatment of molten metal.
  • the work for attaching or detaching the contact electrode is thus disadvantageous in that it is necessary for the personnel to act under the difficult ergonomic conditions. Similar conditions result from the formation of the electrode according to EP-A1-02 35 465.
  • the invention has for its object to provide a maintenance-free, easily replaceable device that enables an automatic and safe connection of the counter electrode to the power supply to the energy source.
  • the device according to the invention it is achieved that when the metallurgical vessels such as pans or distributors are set down in the respective treatment station, the electrical contact with the base electrode is made without the operating personnel becoming irritated.
  • the treatment stands which may a.
  • Contact areas connected to the energy source are provided in a vacuum device, on a revolving tower or on the ironworks site accessible from an ironworks vehicle. In their vertical and horizontal arrangement in the treatment stand, these surfaces are matched to the contact surfaces of current supply elements for the bottom electrode attached to the vessels.
  • the vessel feet or vessel support elements, such as hanging loops or claws, as well as the distance to a housing wall, can be considered as a reference dimension.
  • the contact surfaces are arranged in the vicinity of the bottom of the metallurgical vessel.
  • a large possible use of the vessels is achieved by attaching the transmission elements to the outer shell of the metallurgical vessel, since the matching support elements are provided at the various treatment stations, such as a rotating tower or vacuum system, and the possibility of attachment there is easier to ensure.
  • the contact areas have a size that ensures safe transmission of the energy.
  • Several contacts can be attached to the circumference of the vessels.
  • the contact material is graphite, which is mechanically wear-resistant, pressure and temperature resistant and has the ability to transmit electrical energy with little loss.
  • the contact elements are designed to be easily exchangeable in a maintenance-friendly manner.
  • the support surface of at least one of the elements for transmitting the energy is advantageously divided into segments. A maximum clinging effect of the outer surfaces is achieved if the segments are formed from individual graphite bodies that can compensate for slight changes in path in the pressing direction.
  • the counter element is pocket-shaped and is filled with graphite powder. This ensures that there is close contact between the contacting surfaces even in the event of unevenness.
  • an essentially vertical or horizontal compensation is provided according to the invention.
  • the components connected to the energy source are mounted on springs or they are movably connected in their longitudinal axis to a pressure accumulator unit. This measure ensures a constant contact pressure, which can also be regulated if necessary.
  • the contact surface can be tilted to the vertical or horizontal plane.
  • FIG. 1 shows a treatment station 50 with a housing 51, in which a metallurgical vessel 10 is located on a metallurgical vehicle 52.
  • the electrical current is supplied from an electrical energy source 20 via current supply lines 23 to the electrode 21 and to the counter electrodes 22.
  • the counter electrodes 22 are predominantly arranged in the region of the bottom 13 of the metallurgical vessel 10.
  • the vessel 10 consists of an outer shell 11 with the carrying device 14 and a refractory lining 12.
  • elements 30 for transmitting the electrical energy are arranged by means of a console.
  • a counter-element 40 is provided for each element 30 and can be moved against the element 30 by means of compensating elements 45.
  • the compensating element 45 is formed in the right part of the picture as a spring 46, in the left part of the picture as a piston-cylinder unit 47 with a pressure accumulator 48.
  • the metallurgical vessel 10 is supported on the floor either by the support ring 18 or by the foot 19.
  • FIG. 2 shows the counter element 40, consisting of the component for energy transmission 42 and a tab with the joint 44.
  • the supporting element 43 which is connected to the compensating element 45, here the piston-cylinder unit 47, engages on this joint 44.
  • the component 42 consists of the segments 49, in the present case of cylindrical graphite bodies with the surface 41.
  • the segments 49 are designed to be displaceable in the pressing direction.
  • FIG. 3 shows the elements 30 for the transmission of the electrical energy.
  • the component for energy transmission 32 is designed here as a plate which is attached to the outer shell 11 of the metallurgical vessel 10 via the bracket 33.
  • the plate 32 has a support surface 31.
  • the surface 41 of the counter element 40 bears against the support surface 31.
  • This surface 41 is formed from powdered graphite 70, which is arranged in the component for energy transmission 42, which has a tab with the joint 44.
  • the support element 43 which is connected to a metallurgical vehicle 52, a ladle turret 53 or a distribution channel 54, acts on the joint 44.
  • a spring 46 is provided coaxially to the support element 43, by means of which the component 42 can be moved in the direction of the element 30, so that the surfaces 31 and 41 touch.
  • FIG. 4 shows a detail of the metallurgical vessel 10 with the outer shell 11 and the refractory lining 12.
  • the bracket 33 is fastened to the outer shell 11. Through the console, the outer shell and the A refractory lining is provided through which the counter electrode 22 is guided.
  • the component 32 of the element 30 for the transmission of the electrical energy is separated by the electrical insulation 60.
  • the counter element 40 not shown, will lean with the surface 41 against the surface 31 of the component for energy transmission 32.

Abstract

The invention relates to a thermal treatment installation for molten metal having a metallurgical vessel for receiving the molten metal and a direct-current arc heating device, which is separate or operates as an integrated component and has at least one electrode arranged above the molten metal and at least one counter-electrode in contact with the molten metal. In order to provide a maintenance-free, easily exchangeable installation which permits an automatic, reliable connection of the counter-electrode to the current lead to the energy source, it is proposed that at least one element (30) for transferring the electrical energy to the counter-electrode (22) is provided on the outer casing (11) of the metallurgical vessel (10), and has a surface (31) which supports itself during the heating operation on a surface (41) of a counter-element (40) which is in connection with the electrical energy source (20) and can be positioned by mechanical means (45). <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zur thermischen Behandlung von metallischem Schmelzgut.The invention relates to a device for the thermal treatment of molten metal.

Aus der DE-A1-31 07 454 ist eine Anordnung für Gleichstrom bekannt mit Kontakten für eine Bodenelektrode in der Nähe des Pfannenbodens. Dieser Erfindung liegt die Aufgabe zugrunde, das Raumproblem bei Pfannen und Pfannenöfen zu beheben. Sie befaßt sich nicht mit der Lösung des Problems der Energiezufuhr zu den Bodenelektroden,. sondern nur mit der Ausbildung der Elektroden zur Schmelze hin und zum Außenumfang der Pfanne.
Aus der DE-A1-35 35 690 ist ein Terminal zur trennbaren Verbindung der Strom- sowie der Kühlmittelübertragung bekannt. Die Verbindung kann eine Schraub-, Keil- oder Klemmverbindung sein. Bei einem Wechsel der Kontaktelektrode werden zur Trennung von Stromkabel und Kühlmittelleitungen von der Kontaktelektrode die Kontaktstellen am Terminal von dem Bedienungspersonal gelöst. Die Arbeiten zum Befestigen bzw. zum Lösen der Kontaktelektrode ist somit mit dem Nachteil behaftet, daß unter den schwierigen ergonomischen Bedingungen ein Tätigwerden des Personals erforderlich ist. Ähnliche Bedingungen ergeben sich bei der Ausbildung der Elektrode nach EP-A1-02 35 465.
Der Erfindung liegt die Aufgabe zugrunde, eine wartungsfreie, leicht austauschbare Einrichtung zu schaffen, die ein selbsttätiges und sicheres Anschließen der Gegenelektrode an die Stromzuführung zur Energiequelle ermöglicht.From DE-A1-31 07 454 an arrangement for direct current is known with contacts for a bottom electrode in the vicinity of the pan bottom. This invention has for its object to solve the space problem in pans and pan ovens. It is not concerned with solving the problem of the energy supply to the bottom electrodes. but only with the formation of the electrodes towards the melt and towards the outer circumference of the pan.
From DE-A1-35 35 690 a terminal for the separable connection of the current and the coolant transmission is known. The connection can be a screw, wedge or clamp connection. When changing the contact electrode, the contact points at the terminal are released by the operating personnel to separate the power cable and coolant lines from the contact electrode. The work for attaching or detaching the contact electrode is thus disadvantageous in that it is necessary for the personnel to act under the difficult ergonomic conditions. Similar conditions result from the formation of the electrode according to EP-A1-02 35 465.
The invention has for its object to provide a maintenance-free, easily replaceable device that enables an automatic and safe connection of the counter electrode to the power supply to the energy source.

Zur Lösung dieser Aufgabe wird eine Einrichtung zur thermischen Behandlung von metallischem Schmelzgut der eingangs genannten Art vorgeschlagen, die erfindungsgemäß die im Anspruch 1 genannten Merkmale hat.To achieve this object, a device for the thermal treatment of molten metal of the type mentioned at the outset is proposed, which according to the invention has the features mentioned in claim 1.

Durch die erfindungsgemäße Einrichtung wird erreicht, daß beim Absetzen der metallurgischen Gefäße wie Pfannen oder Verteiler in den jeweiligen Behandlungsstand ohne ein lätigwerden des Bedienungspersonals der elektrische Kontakt zur Bodenelektrode hergestellt wird.By means of the device according to the invention it is achieved that when the metallurgical vessels such as pans or distributors are set down in the respective treatment station, the electrical contact with the base electrode is made without the operating personnel becoming irritated.

In den Behandlungsständen, die sich u. a. in Vakuum-Einrichtung, an einem Drehturm oder auf dem Hüttengelände von einen Hüttenfahrzeug erreichbar befinden, sind mit der Energiequelle verbundene Kontaktflächen vorgesehen. Diese Flächen sind in ihrer vertikalen und horizontalen Anordnung im Behandlungsstand auf die Kontaktflächen von an den Gefäßen angebrachten Stromzufuhrelementen für die Bodenelektrode abgestimmt. Als Referenzmaß kommen dabei die Gefäßfüße oder Gefäßtragelemente wie beispielsweise Gehängeschlaufen oder Tragpratzen wie auch der Abstand zu einer Gehäusewandung in Betracht.In the treatment stands, which may a. Contact areas connected to the energy source are provided in a vacuum device, on a revolving tower or on the ironworks site accessible from an ironworks vehicle. In their vertical and horizontal arrangement in the treatment stand, these surfaces are matched to the contact surfaces of current supply elements for the bottom electrode attached to the vessels. The vessel feet or vessel support elements, such as hanging loops or claws, as well as the distance to a housing wall, can be considered as a reference dimension.

Die Kontaktflächen sind dabei in der Nähe des Bodens des metallurgischen Gefäßes angeordnet. Eine große Einsatzmöglichkeit der Gefäße wird durch Anbringung der Übertragungselemente an die Außenhülle des metallurgischen Gefäßes erreicht, da die dazu passenden Stützelemente an den verschiedenen Behandlungsständen wie Drehturm oder Vakuumanlage vorgesehen sind und die Anbringungsmöglichkeit dort einfacher sicherzustellen ist.The contact surfaces are arranged in the vicinity of the bottom of the metallurgical vessel. A large possible use of the vessels is achieved by attaching the transmission elements to the outer shell of the metallurgical vessel, since the matching support elements are provided at the various treatment stations, such as a rotating tower or vacuum system, and the possibility of attachment there is easier to ensure.

Die Kontaktflächen besitzen eine Größe, die ein sicheres Übertragen der Energie gewähnleistet. Am Umfang der Gefäße können mehrere Kontakte angebracht werden.The contact areas have a size that ensures safe transmission of the energy. Several contacts can be attached to the circumference of the vessels.

Als Kontaktwerkstoff ist Graphit vorgesehen, der mechanisch verschleißfest sowie druck- und temperaturbeständig ist und die Fähigkeit besitzt, elektrische Energie verlustarm zu übertragen. In instandhaltungsgerechter Weise sind die Kontaktelemente leicht wechselbar gestaltet.The contact material is graphite, which is mechanically wear-resistant, pressure and temperature resistant and has the ability to transmit electrical energy with little loss. The contact elements are designed to be easily exchangeable in a maintenance-friendly manner.

Eine mögliche Verschmutzung wird durch besondere Gestaltung der Oberfläche begegnet. In vorteilhafter Weise ist die Stützfläche mindestens eines der Elemente zur Übertragung der Energie segmentförmig aufgeteilt. Ein maximaler Anschmiegeeffekt der Außenflächen wird erreicht, wenn die Segmente aus einzelnen Graphitkörpern gebildet werden, die geringe Wegeänderung in Anpreßrichtung ausgleichen können.Possible contamination is countered by special surface design. The support surface of at least one of the elements for transmitting the energy is advantageously divided into segments. A maximum clinging effect of the outer surfaces is achieved if the segments are formed from individual graphite bodies that can compensate for slight changes in path in the pressing direction.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist das Gegenelement taschenförmig ausgebildet und ist mit Graphitpulver gefüllt. Hierdurch wird erreicht, daß ein enger Kontakt der sich berührenden Flächen auch bei Unebenheiten entsteht.In a further advantageous embodiment of the invention, the counter element is pocket-shaped and is filled with graphite powder. This ensures that there is close contact between the contacting surfaces even in the event of unevenness.

Um einen sicheren Kontakt der Gesamtflächen im rauhen Betrieb zu gewährleisten ist erfindungsgemäß ein im wesentlichen vertikaler bzw. horizontaler Ausgleich vorgesehen. Hierzu sind die mit der Energiequelle in Verbindung stehenden Bauteile auf Federn gelagert oder sie stehen in ihrer Längsachse bewegbar mit einer Druckspeichereinheit in Verbindung. Durch diese Maßnahme ist eine konstante Anpreßkraft der Kontakte gewährleistet, die im Bedarfsfall dazu noch regulierbar ist. Darüber hinaus ist die Kontaktfläche zur vertikalen bzw. horizontalen Ebene kippbar ausgeführt.In order to ensure reliable contact of the entire surfaces in rough operation, an essentially vertical or horizontal compensation is provided according to the invention. For this purpose, the components connected to the energy source are mounted on springs or they are movably connected in their longitudinal axis to a pressure accumulator unit. This measure ensures a constant contact pressure, which can also be regulated if necessary. In addition, the contact surface can be tilted to the vertical or horizontal plane.

Ein Beispiel der Erfindung ist in den Zeichnungen näher ausgeführt. Es zeigt:

Fig. 1
einen Schnitt durch eine Pfannenbeheizungsanlage,
Fig. 2
ein segmentförmig aufgeteiltes Bauteil,
Fig. 3
ein taschenförmiges Bauteil,
Fig. 4
eine isolierte Gegenelektrode.
An example of the invention is shown in the drawings. It shows:
Fig. 1
a section through a pan heating system,
Fig. 2
a segmented component,
Fig. 3
a pocket-shaped component,
Fig. 4
an insulated counter electrode.

Die Figur 1 zeigt eine Behandlungsstation 50 mit einer Einhausung 51, in der ein metallurgisches Gefäß 10 sich auf einem Hüttenfahrzeug 52 befindet.FIG. 1 shows a treatment station 50 with a housing 51, in which a metallurgical vessel 10 is located on a metallurgical vehicle 52.

Von einer Elektroenergiequelle 20 wird über Stromzuführungsleitungen 23 der elektrische Strom zur Elektrode 21 und zu den Gegenelektroden 22 geführt. Die Gegenelektroden 22 sind dabei vorwiegend im Bereich des Bodens 13 des metallurgischen Gefäßes 10 angeordnet. Das Gefäß 10 besteht aus einer Außenhülle 11 mit der Tragvorrichtung 14 und einer Feuerfestauskleidung 12.The electrical current is supplied from an electrical energy source 20 via current supply lines 23 to the electrode 21 and to the counter electrodes 22. The counter electrodes 22 are predominantly arranged in the region of the bottom 13 of the metallurgical vessel 10. The vessel 10 consists of an outer shell 11 with the carrying device 14 and a refractory lining 12.

An der Außenhülle 11 sind mittels einer Konsole 33 Elemente 30 zur Übertragung der elektrischen Energie angeordnet.On the outer shell 11, elements 30 for transmitting the electrical energy are arranged by means of a console.

Zu jedem Element 30 ist ein Gegenelement 40 vorgesehen, das mittels Ausgleichelementen 45 gegen das Element 30 bewegbar ist. Das Ausgleichselement 45 ist im rechten Teil des Bildes als Feder 46, im linken Teil des Bildes als Kolben-Zylinder-Einheit 47 mit Druckspeicher 48 ausgebildet.A counter-element 40 is provided for each element 30 and can be moved against the element 30 by means of compensating elements 45. The compensating element 45 is formed in the right part of the picture as a spring 46, in the left part of the picture as a piston-cylinder unit 47 with a pressure accumulator 48.

Das metallurgische Gefäß 10 stützt sich am Boden entweder über den Stützring 18 oder über den Fuß 19 ab.The metallurgical vessel 10 is supported on the floor either by the support ring 18 or by the foot 19.

Die Figur 2 zeigt das Gegenelement 40, bestehend aus dem Bauteil zur Energieübertragung 42 und einer Lasche mit dem Gelenk 44. An diesem Gelenk 44 greift das Stützelement 43 an, das mit dem Ausgleichselement 45, hier der Kolben-Zylinder-Einheit 47 verbunden ist.FIG. 2 shows the counter element 40, consisting of the component for energy transmission 42 and a tab with the joint 44. The supporting element 43, which is connected to the compensating element 45, here the piston-cylinder unit 47, engages on this joint 44.

Das Bauteil 42 besteht aus den Segmenten 49, im vorliegenden Fall aus zylindrischen Körpern aus Graphit mit der Fläche 41. Dabei sind die Segmente 49 in Anpreßrichtung verschiebbar ausgestaltet.The component 42 consists of the segments 49, in the present case of cylindrical graphite bodies with the surface 41. The segments 49 are designed to be displaceable in the pressing direction.

Die Figur 3 zeigt die Elemente 30 zur Übertragung der elektrischen Energie. Das Bauteil zur Energieübertragung 32 ist hier als Platte ausgeführt, die über die Konsole 33 an der Außenhülle 11 des metallurgischen Gefäßes 10 befestigt ist. Die Platte 32 weist eine Stützfläche 31 auf.FIG. 3 shows the elements 30 for the transmission of the electrical energy. The component for energy transmission 32 is designed here as a plate which is attached to the outer shell 11 of the metallurgical vessel 10 via the bracket 33. The plate 32 has a support surface 31.

Gegen die Stützfläche 31 legt sich die Fläche 41 des Gegenelementes 40 an. Diese Fläche 41 wird gebildet aus pulverförmigem Graphit 70, der im Bauteil zur Energieübertragung 42 angeordnet ist, das eine Lasche mit dem Gelenk 44 aufweist. Am Gelenk 44 greift das Stützelement 43 an, das an einem Hüttenfahrzeug 52, einem Pfannendrehturm 53 oder einer Verteilerrinne 54 verbunden ist. Koaxial zum Stützelement 43 ist eine Feder 46 vorgesehen, mittels der das Bauteil 42 in Richtung Element 30 bewegbar ist, so daß die Flächen 31 und 41 sich berühren.The surface 41 of the counter element 40 bears against the support surface 31. This surface 41 is formed from powdered graphite 70, which is arranged in the component for energy transmission 42, which has a tab with the joint 44. The support element 43, which is connected to a metallurgical vehicle 52, a ladle turret 53 or a distribution channel 54, acts on the joint 44. A spring 46 is provided coaxially to the support element 43, by means of which the component 42 can be moved in the direction of the element 30, so that the surfaces 31 and 41 touch.

Die Figur 4 zeigt ein Detail des metallurgischen Gefäßes 10 mit der Außenhülle 11 und der Feuerfestauskleidung 12. An der Außenhülle 11 ist die Konsole 33 befestigt. Durch die Konsole, die Außenhülle und die Feuerfestverkleidung ist eine Bohrung vorgesehen, durch die die Gegenelektrode 22 geführt ist. Gegenüber den metallischen Elementen 11 (Außenhülle) und 33 (Konsole) ist das Bauteil 32 des Elementes 30 zur Übertragung der elektrischen Energie durch die elektrische Isolierung 60 getrennt. Das nicht dargestellte Gegenelement 40 wird sich mit der Fläche 41 gegen die Fläche 31 des Bauteils zur Energieübertragung 32 lehnen.FIG. 4 shows a detail of the metallurgical vessel 10 with the outer shell 11 and the refractory lining 12. The bracket 33 is fastened to the outer shell 11. Through the console, the outer shell and the A refractory lining is provided through which the counter electrode 22 is guided. Compared to the metallic elements 11 (outer shell) and 33 (console), the component 32 of the element 30 for the transmission of the electrical energy is separated by the electrical insulation 60. The counter element 40, not shown, will lean with the surface 41 against the surface 31 of the component for energy transmission 32.

Claims (20)

  1. Apparatus for the thermal treatment of metallic melting stock, with a treatment stand (50), into which a metallurgical vessel (10) which serves to receive the melting stock can be inserted, as well as with a direct-current arc heating device having at least one electrode (21) arranged above the melting stock and having at least one counter-electrode (22) standing in contact with the melting stock, the counter-electrode (22) being conducted through the outer casing (11) of the metallurgical vessel (10) and forming there a first element (30), which has an electrical contact surface (31), which is supported upon the insertion of the metallurgical vessel and during the heating process on a second contact surface (41) which is formed on a counter-element (40) which is not part of the metallurgical vessel and which communicates with the electrical energy source (20) and which is forced with mechanical means (45) against the first element (30) to form the contact.
  2. Apparatus according to claim 1, characterised in that the first element (30) is provided on the supporting ring (18) of the metallurgical vessel (10).
  3. Apparatus according to claim 1, characterised in that the first element (30) is provided on the feet (19) of the metallurgical vessel (10).
  4. Apparatus according to any one of claims 1 to 3, characterised in that component parts (32, 42) which consist of non-combustible material which conducts the electrical current, for example graphite, are provided for the transfer of energy to the elements (30, 40).
  5. Apparatus according to claim 4, characterised in that contact surfaces (31, 41) which are split up into segments (39, 49) which are spaced apart from one another are provided on the component parts (32, 42).
  6. Apparatus according to claim 5, characterised in that individual segments (39, 49) are movable independently of one another in the supporting direction.
  7. Apparatus according to claim 4, characterised in that the component part (42) of the counter-element (40) is pocket-shaped in design and the pocket is filled with powdery material (70).
  8. Apparatus according to any one of claims 5 to 7, characterised in that the component part (42) is fastened detachably to supporting elements (43).
  9. Apparatus according to claim 8, characterised in that a joint (44) which makes an angular movement of the contact surface (41) with regard to its rest position in the unloaded state possible is provided on the supporting element (43).
  10. Apparatus according to claim 9, characterised in that the joint (44) is connected to a compensating element (45) for shifting the contact surface (41) in the squeezing direction.
  11. Apparatus according to claim 10, characterised in that the compensating element (45) is a spring (46).
  12. Apparatus according to claim 10, characterised in that the compensating element (45) is a piston/cylinder unit (47).
  13. Apparatus according to claim 12, characterised in that the piston/cylinder unit (47) is connected to a pressure storage unit (48).
  14. Apparatus according to claim 13, characterised in that the pressure storage unit (48) is adjustable as a function of the squeezing pressure between the supporting surface (31) and the contact surface (41) of the counter-element (40).
  15. Apparatus according to any one of claims 1 to 14, characterised in that the counter-electrode (22) communicates with the component part (32) of the element (30).
  16. Apparatus according to claim 15, characterised in that an electrical insulation (60) is provided between the component part (32) as well as the counter-electrode (22) and the outer casing (11) of the metallurgical vessel.
  17. Apparatus according to claim 10, characterised in that the compensating element (45), is arranged on a foundry vehicle (52) which is mobile for the reception of the metallurgical vessel (10) and is fixable in a basic position for the heating.
  18. Apparatus according to claim 10, characterised in that the compensating element (45) is provided on a revolving ladle turret (53).
  19. Apparatus according to claim 10, characterised in that the compensating element (45) is arranged on a distributor channel (54).
  20. Apparatus according to claim 1, characterised in that the counter-element (40) is arranged inside a housing (51) of a vacuum installation.
EP89730089A 1988-05-18 1989-04-03 Thermal treatment installation for molten metal Expired - Lifetime EP0344092B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817379A DE3817379C1 (en) 1988-05-18 1988-05-18
DE3817379 1988-05-18

Publications (3)

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EP0344092A2 EP0344092A2 (en) 1989-11-29
EP0344092A3 EP0344092A3 (en) 1991-01-23
EP0344092B1 true EP0344092B1 (en) 1994-06-01

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EP89730089A Expired - Lifetime EP0344092B1 (en) 1988-05-18 1989-04-03 Thermal treatment installation for molten metal

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US (1) US4958358A (en)
EP (1) EP0344092B1 (en)
JP (1) JP2832539B2 (en)
KR (1) KR970008502B1 (en)
AT (1) ATE106652T1 (en)
CA (1) CA1316972C (en)
DE (2) DE3817379C1 (en)
ES (1) ES2054080T3 (en)

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Also Published As

Publication number Publication date
JP2832539B2 (en) 1998-12-09
KR890017018A (en) 1989-12-14
ES2054080T3 (en) 1994-08-01
EP0344092A2 (en) 1989-11-29
CA1316972C (en) 1993-04-27
EP0344092A3 (en) 1991-01-23
DE58907738D1 (en) 1994-07-07
KR970008502B1 (en) 1997-05-24
US4958358A (en) 1990-09-18
JPH0219429A (en) 1990-01-23
DE3817379C1 (en) 1989-06-22
ATE106652T1 (en) 1994-06-15

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