EP2859293B1 - Arc furnace - Google Patents

Arc furnace Download PDF

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Publication number
EP2859293B1
EP2859293B1 EP13729678.6A EP13729678A EP2859293B1 EP 2859293 B1 EP2859293 B1 EP 2859293B1 EP 13729678 A EP13729678 A EP 13729678A EP 2859293 B1 EP2859293 B1 EP 2859293B1
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EP
European Patent Office
Prior art keywords
furnace
lid
furnace vessel
vessel
vertical direction
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Application number
EP13729678.6A
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German (de)
French (fr)
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EP2859293A1 (en
Inventor
Björn Mossmann
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Publication of EP2859293A1 publication Critical patent/EP2859293A1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/02—Crucible or pot furnaces with tilting or rocking arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/10—Crucibles
    • F27B14/12—Covers therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
    • F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B2014/0825—Crucible or pot support
    • F27B2014/0831—Support or means for the transport of crucibles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F27B3/16—Walls; Roofs
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers

Definitions

  • the invention relates to an electric arc furnace.
  • an arc furnace for melting the steel and a lid for closing the furnace vessel during the melting process.
  • the lid is connected via a pivot cylinder with a pivoting unit, also referred to as a portal. By means of the pivot cylinder, the lid is first lifted, so that it dissolves from the furnace vessel. Thereafter, it can be pivoted laterally away from the furnace vessel by means of the pivoting unit.
  • the furnace vessel For emptying the liquid steel from the furnace vessel this is tilted about an axis perpendicular to the longitudinal axis of the furnace axis.
  • the furnace vessel is mounted on a cradle which comprises a rolling path provided for this tilting movement. In such a tilting movement and the pivot unit is tilted with the lid.
  • the electric arc furnace comprises a furnace vessel for melting steel, a lid for closing the furnace vessel and a pivoting unit with which the lid of the Oven vessel is moved away. Furthermore, the furnace vessel is mounted movable relative to the pivoting unit in the vertical direction. In addition, the pivot unit has a receptacle for releasably fixing the lid in the vertical direction.
  • the electric arc furnace according to the invention thus differs from an electric arc furnace known from the prior art in that the furnace vessel is mounted so as to be movable relative to the pivoting unit in the vertical direction and the cover is detachably fixable in a receptacle of the pivoting unit, ie not firmly connected to the pivoting unit.
  • the cover In a position in which the melting operation takes place, the cover is arranged above the furnace vessel, so that it is closed. In this case, the lid is not in engagement with the pivot unit and is therefore not connected to this.
  • the swivel unit is therefore free to move during the melting operation without a lid. This simplifies readjustment of the electrodes arranged on the pivoting unit.
  • the fixed pivot unit that when emptying the furnace vessel and the associated tilting movement of the furnace vessel, the lid and the pivoting unit do not tilt with the furnace vessel, so that a parting with simultaneous power supply to the furnace or to the electrodes is possible, which an increase in the time of total energy input and thus higher productivity.
  • This is achieved by making it possible to work the electrode control when the cover remains in a horizontal position.
  • the furnace vessel is mounted in a movable cradle in the vertical direction.
  • a cradle can preferably be moved by means of hydraulic cylinders.
  • the hydraulic cylinders By operating the hydraulic cylinders, the cradle and the oven vessel stored therein are moved vertically downwards or upwards.
  • the cradle has a plurality of separately controllable hydraulic cylinder, it can not only be moved in a vertical direction up and down but also tilted to empty the furnace vessel.
  • the lid when closing the furnace vessel is supported by means arranged on the cradle supports. In a vertical movement of the cradle with the supports and thus also of the furnace vessel down so after the fixation of the lid in the receptacle of the pivoting unit, the lid is also released from the supports.
  • the lid is moved away by means of the pivoting unit by a rotational movement about an axis extending in the vertical direction of the furnace vessel. The lid is thereby moved away from the furnace vessel in the horizontal direction.
  • Fig. 1 an arc furnace 2 is shown having a furnace vessel 4 for melting steel and a lid 6 for closing the furnace vessel.
  • the lid 6 is in a position in which it closes the oven vessel 4, as is the case during the melting operation of steel.
  • the furnace vessel 4 is mounted on a cradle 8, which has a plurality of separately controllable hydraulic cylinders 10.
  • the hydraulic cylinders 10 are in Fig. 1 shown in its extended position.
  • the cradle 8 is thus movable in the vertical direction downwards or upwards, whereby the furnace vessel 4 is movable in the corresponding direction.
  • the lid 6 of the arc furnace 2 in the closed state of the furnace vessel 4, as in Fig. 1 is supported.
  • a portal pivot unit 14 is also fixed, which only is mounted rotatably about its axis A.
  • the pivoting unit 14 serves to move the lid 6 away from the oven vessel 4.
  • the pivoting unit 14 also has a receptacle 16 in which the lid can be fixed in the vertical direction.
  • the receptacle 16 is formed in the embodiment shown by a support surface and a pin, in which a correspondingly shaped connection unit 18 of the lid can engage.
  • the lid 6 by means of the pivoting unit 14 by a rotational movement about the in the vertical direction extending axis A are moved away from the furnace vessel 4, as in Fig. 3 is shown.
  • the furnace vessel 4 in the open state and can be charged, for example, with scrap.
  • the lid 6 is in this situation laterally of the furnace vessel. 4
  • the lid 6 can then be moved back to the furnace vessel 4, so that in turn the in Fig. 2 shown situation is reached, in which the lid 6 is again arranged above the furnace vessel 4. Subsequently, when the cradle 4 is moved upwardly in the vertical direction by means of the hydraulic cylinders 10, the cover 6 is lifted out of the receptacle 14 of the pivoting unit 16, thereby releasing the fixing in the vertical direction. The cover 6 is then supported again on the supports 12, as it is in Fig. 1 is shown.
  • the inventive design of the arc furnace 2 is thus a pivot cylinder, as it is required in an arc furnace known from the prior art, unnecessary. As a result, fewer components are needed and the opening process of the furnace vessel 4 is simplified.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Die Erfindung betrifft einen Lichtbogenofen.The invention relates to an electric arc furnace.

Zur Wiederaufarbeitung von Stahlschrott werden Lichtbogenöfen, wie z.B. in EP 0 385 434 A2 , EP 0 203 339 A2 oder DE 1 067 984 A1 dargestellt, eingesetzt, bei denen der Stahlschrott mit Hilfe einer Elektrode und einem brennenden Lichtbogen erhitzt und schließlich aufgeschmolzen wird. Ein derartiger Lichtbogenofen umfasst ein Ofengefäß zum Schmelzen des Stahls und einen Deckel zum Verschließen des Ofengefäßes während des Schmelzprozesses. Zur Chargierung des Ofens mit Schrott und zu dessen Wartung ist es notwendig, das Ofengefäß zu öffnen und daher den Deckel aufzuschwenken. Dazu ist der Deckel über einen Pivot-Zylinder mit einer auch als Portal bezeichneten Schwenkeinheit verbunden. Mittels des Pivot-Zylinders wird der Deckel zunächst angehoben, so dass sich dieser vom Ofengefäß löst. Danach kann er mittels der Schwenkeinheit seitlich von dem Ofengefäß weggeschwenkt werden.For the reprocessing of steel scrap arc furnaces, such as in EP 0 385 434 A2 . EP 0 203 339 A2 or DE 1 067 984 A1 used, in which the steel scrap is heated by means of an electrode and a burning arc and finally melted. Such an arc furnace comprises a furnace vessel for melting the steel and a lid for closing the furnace vessel during the melting process. For charging the furnace with scrap and for its maintenance, it is necessary to open the furnace vessel and therefore open the lid. For this purpose, the lid is connected via a pivot cylinder with a pivoting unit, also referred to as a portal. By means of the pivot cylinder, the lid is first lifted, so that it dissolves from the furnace vessel. Thereafter, it can be pivoted laterally away from the furnace vessel by means of the pivoting unit.

Zum Entleeren des flüssigen Stahls aus dem Ofengefäß wird dieses um eine senkrecht zur Längsachse des Ofens stehende Achse gekippt. Dazu ist das Ofengefäß auf einer Wiege gelagert, welche eine für diese Kippbewegung vorgesehene Abrollbahn umfasst. Bei einer derartigen Kippbewegung wird auch die Schwenkeinheit mit dem Deckel mitgekippt.For emptying the liquid steel from the furnace vessel this is tilted about an axis perpendicular to the longitudinal axis of the furnace axis. For this purpose, the furnace vessel is mounted on a cradle which comprises a rolling path provided for this tilting movement. In such a tilting movement and the pivot unit is tilted with the lid.

Es ist nun Aufgabe der vorliegenden Erfindung einen Lichtbogenofen anzugeben, mit dem der Öffnungsvorgang vereinfacht wird.It is an object of the present invention to provide an electric arc furnace with which the opening process is simplified.

Diese Aufgabe wird gelöst durch einen Lichtbogenofen mit den Merkmalen des Patentanspruches 1.This object is achieved by an electric arc furnace having the features of patent claim 1.

Der erfindungsgemäße Lichtbogenofen weist ein Ofengefäß zum Schmelzen von Stahl, einen Deckel zum Verschließen des Ofengefäßes und eine Schwenkeinheit auf, mit der der Deckel vom Ofengefäß wegbewegbar ist. Des Weiteren ist das Ofengefäß relativ zur Schwenkeinheit in vertikaler Richtung bewegbar gelagert. Außerdem weist die Schwenkeinheit eine Aufnahme zum lösbaren Fixieren des Deckels in vertikaler Richtung auf.The electric arc furnace according to the invention comprises a furnace vessel for melting steel, a lid for closing the furnace vessel and a pivoting unit with which the lid of the Oven vessel is moved away. Furthermore, the furnace vessel is mounted movable relative to the pivoting unit in the vertical direction. In addition, the pivot unit has a receptacle for releasably fixing the lid in the vertical direction.

Der erfindungsgemäße Lichtbogenofen unterscheidet sich also von einem aus dem Stand der Technik bekannten Lichtbogenofen dadurch, dass das Ofengefäß relativ zur Schwenkeinheit in vertikaler Richtung bewegbar gelagert und der Deckel in einer Aufnahme der Schwenkeinheit lösbar fixierbar, also nicht fest mit der Schwenkeinheit verbunden ist.The electric arc furnace according to the invention thus differs from an electric arc furnace known from the prior art in that the furnace vessel is mounted so as to be movable relative to the pivoting unit in the vertical direction and the cover is detachably fixable in a receptacle of the pivoting unit, ie not firmly connected to the pivoting unit.

In einer Position in der der Schmelzbetrieb erfolgt, ist der Deckel oberhalb des Ofengefäßes angeordnet, so dass dieser verschlossen ist. Dabei ist der Deckel nicht im Eingriff mit der Schwenkeinheit und ist somit mit dieser nicht verbunden. Die Schwenkeinheit ist während des Schmelzbetriebs dadurch frei und ohne Deckel bewegbar. Dadurch wird ein Nachsetzen der an der Schwenkeinheit angeordneten Elektroden vereinfacht.In a position in which the melting operation takes place, the cover is arranged above the furnace vessel, so that it is closed. In this case, the lid is not in engagement with the pivot unit and is therefore not connected to this. The swivel unit is therefore free to move during the melting operation without a lid. This simplifies readjustment of the electrodes arranged on the pivoting unit.

Um den Deckel des Lichtbogenofens vom Ofengefäß zu lösen wird dann zunächst durch eine Bewegung des Ofengefäßes relativ zur feststehenden Schwenkeinheit in vertikaler Richtung nach unten der Deckel in die Aufnahme der Schwenkeinheit eingehängt, so dass der Deckel in vertikaler Richtung fixiert ist. Nach dem Einhängen erfolgt eine weitergehende Bewegung des Ofengefäßes in vertikale Richtung nach unten, so dass der Deckel von dem Ofengefäß gelöst ist und danach vom Ofengefäß wegbewegt werden kann.In order to release the lid of the arc furnace from the furnace vessel is then hung by a movement of the furnace vessel relative to the fixed pivot unit in the vertical direction down the lid in the receptacle of the pivoting unit, so that the lid is fixed in the vertical direction. After hanging a further movement of the furnace vessel in the vertical direction is down, so that the lid is detached from the furnace vessel and can then be moved away from the furnace vessel.

Durch die erfindungsgemäße Ausgestaltung des Lichtbogenofens, insbesondere durch die in vertikaler Richtung bewegbare Lagerung des Ofengefäßes mit Deckel wird also erreicht, dass auf den Pivot-Zylinder verzichtet werden kann. Dies ergibt somit eine Einsparung an benötigten Bauteilen und der aufwändigen Bearbeitung des Deckelhubwerks.Due to the inventive design of the arc furnace, in particular by the movable in the vertical direction storage of the furnace vessel with lid is thus achieved that can be dispensed with the pivot cylinder. This results in a saving of required components and the complex processing of Deckelhubwerks.

Des Weiteren wird durch die feststehende Schwenkeinheit erreicht, dass beim Entleeren des Ofengefäßes und der damit verbundenen Kippbewegung des Ofengefäßes der Deckel und die Schwenkeinheit nicht mit dem Ofengefäß mitkippen, so dass ein Abstechen bei gleichzeitiger Energiezufuhr zum Ofen bzw. zu den Elektroden möglich ist, was eine Erhöhung der Zeit der Energiezufuhr insgesamt und dadurch eine höhere Produktivität zur Folge hat. Dies wird dadurch erreicht, dass bei dem Verbleib des Deckels in horizontaler Lage ein Arbeiten der Elektrodenregelung ermöglicht wird.Furthermore, it is achieved by the fixed pivot unit, that when emptying the furnace vessel and the associated tilting movement of the furnace vessel, the lid and the pivoting unit do not tilt with the furnace vessel, so that a parting with simultaneous power supply to the furnace or to the electrodes is possible, which an increase in the time of total energy input and thus higher productivity. This is achieved by making it possible to work the electrode control when the cover remains in a horizontal position.

Bei einer bevorzugten Ausgestaltung der Erfindung ist das Ofengefäß in einer in vertikaler Richtung bewegbaren Wiege gelagert. Eine derartige Wiege kann bevorzugt mittels Hydraulikzylinder bewegt werden. Somit wird durch das Betätigen der Hydraulikzylinder die Wiege und das darin gelagerte Ofengefäß in vertikaler Richtung nach unten bzw. oben bewegt.In a preferred embodiment of the invention, the furnace vessel is mounted in a movable cradle in the vertical direction. Such a cradle can preferably be moved by means of hydraulic cylinders. Thus, by operating the hydraulic cylinders, the cradle and the oven vessel stored therein are moved vertically downwards or upwards.

Wenn die Wiege mehrere getrennt ansteuerbare Hydraulikzylinder aufweist kann diese nicht nur in vertikaler Richtung nach oben und unten bewegt sondern auch zum Entleeren des Ofengefäßes gekippt werden.If the cradle has a plurality of separately controllable hydraulic cylinder, it can not only be moved in a vertical direction up and down but also tilted to empty the furnace vessel.

Bei einer weiteren bevorzugten Ausgestaltung der Erfindung ist der Deckel beim Verschließen des Ofengefäßes mittels auf der Wiege angeordneten Stützen abgestützt. Bei einer vertikalen Bewegung der Wiege mit den Stützen und somit auch des Ofengefäßes nach unten wird also nach der Fixierung des Deckels in der Aufnahme der Schwenkeinheit der Deckel auch von den Stützen gelöst.In a further preferred embodiment of the invention, the lid when closing the furnace vessel is supported by means arranged on the cradle supports. In a vertical movement of the cradle with the supports and thus also of the furnace vessel down so after the fixation of the lid in the receptacle of the pivoting unit, the lid is also released from the supports.

Bei einer weiteren bevorzugten Ausgestaltung der Erfindung wird der Deckel mittels der Schwenkeinheit durch eine Rotationsbewegung um eine in vertikale Richtung verlaufende Achse vom Ofengefäß wegbewegt. Der Deckel wird dadurch also seitlich vom Ofengefäß in horizontaler Richtung wegbewegt.In a further preferred embodiment of the invention, the lid is moved away by means of the pivoting unit by a rotational movement about an axis extending in the vertical direction of the furnace vessel. The lid is thereby moved away from the furnace vessel in the horizontal direction.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung der Ausführungsbeispiele, die im Zusammenhang mit den Zeichnungen näher erläutert werden.The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following description of the embodiments, which will be described in connection with the drawings.

Für eine weitere Beschreibung der Erfindung wird auf die Ausführungsbeispiele der Zeichnungen verwiesen. Es zeigen jeweils in einer schematischen Prinzipskizze:

Fig. 1
einen Lichtbogenofen mit Deckel in einer Position während des Schmelzbetriebs,
Fig. 2
einen Lichtbogenofen mit Deckel, der an der Schwenkeinheit fixiert ist,
Fig. 3
einen Lichtbogenofen mit geöffnetem Deckel.
For a further description of the invention reference is made to the embodiments of the drawings. Each shows in a schematic schematic diagram:
Fig. 1
an electric arc furnace with a lid in a position during the melting operation,
Fig. 2
an arc furnace with a lid fixed to the pivoting unit,
Fig. 3
an electric arc furnace with the lid open.

In Fig. 1 ist ein Lichtbogenofen 2 dargestellt, der ein Ofengefäß 4 zum Schmelzen von Stahl und einen Deckel 6 zum Verschließen des Ofengefäßes aufweist. Der Deckel 6 befindet sich dabei in einer Position, in der er das Ofengefäß 4 verschließt, wie es während des Schmelzbetriebs von Stahl der Fall ist.In Fig. 1 an arc furnace 2 is shown having a furnace vessel 4 for melting steel and a lid 6 for closing the furnace vessel. The lid 6 is in a position in which it closes the oven vessel 4, as is the case during the melting operation of steel.

Das Ofengefäß 4 ist auf einer Wiege 8 gelagert, welche mehrere getrennt ansteuerbare Hydraulikzylinder 10 aufweist. Die Hydraulikzylinder 10 sind in Fig. 1 in ihrer ausgefahrenen Position dargestellt. Durch einen Hub der Hydraulikzylinder 10 ist die Wiege 8 somit in vertikaler Richtung nach unten bzw. oben bewegbar, wodurch auch das Ofengefäß 4 in entsprechender Richtung bewegbar ist. An der Wiege 8 sind ferner mehrere Stützen 12 angeordnet, die den Deckel 6 des Lichtbogenofens 2 im verschlossenen Zustand des Ofengefäßes 4, wie er in Fig. 1 dargestellt ist, abstützen. Neben der Wiege 8 und dem Ofengefäß 4 ist ferner eine auch als Portal bezeichnete Schwenkeinheit 14 feststehend angeordnet, die lediglich um ihre Achse A drehbar gelagert ist. Die Schwenkeinheit 14 dient dazu, den Deckel 6 vom Ofengefäß 4 wegzubewegen. Die Schwenkeinheit 14 weist ferner eine Aufnahme 16 auf, in der der Deckel in vertikaler Richtung fixierbar ist. Die Aufnahme 16 wird in dem gezeigten Ausführungsbeispiel durch eine Auflagefläche und einen Zapfen gebildet, in der eine entsprechend ausgeformte Verbindungseinheit 18 des Deckels eingreifen kann.The furnace vessel 4 is mounted on a cradle 8, which has a plurality of separately controllable hydraulic cylinders 10. The hydraulic cylinders 10 are in Fig. 1 shown in its extended position. By a stroke of the hydraulic cylinder 10, the cradle 8 is thus movable in the vertical direction downwards or upwards, whereby the furnace vessel 4 is movable in the corresponding direction. At the cradle 8 more supports 12 are further arranged, the lid 6 of the arc furnace 2 in the closed state of the furnace vessel 4, as in Fig. 1 is supported. In addition to the cradle 8 and the furnace vessel 4 also known as a portal pivot unit 14 is also fixed, which only is mounted rotatably about its axis A. The pivoting unit 14 serves to move the lid 6 away from the oven vessel 4. The pivoting unit 14 also has a receptacle 16 in which the lid can be fixed in the vertical direction. The receptacle 16 is formed in the embodiment shown by a support surface and a pin, in which a correspondingly shaped connection unit 18 of the lid can engage.

Zum Öffnen des Ofengefäßes 4 wird dieses relativ zu der in vertikaler Richtung feststehenden Schwenkeinheit 14 in vertikaler Richtung nach unten bewegt. Dies wird dadurch realisiert, dass die Hydraulikzylinder 10 in einen eingefahrenen Zustand bewegt werden und dadurch die Wiege 8 in vertikaler Richtung nach unten bewegt, also abgesenkt wird. Durch die Bewegung nach unten wird mit der Wiege 8 auch das Ofengefäß 4 und der Deckel 6 nach unten bewegt. Der Deckel 6 wird dabei solange mitbewegt, bis das Verbindungselement 18 in der Aufnahme 16 der Schwenkeinheit 14 zum Eingriff kommt und der Deckel 6 somit in der Schwenkeinheit 14 eingehängt ist. In diesem Fall kommt also das Verbindungselement 18 auf der Aufnahmefläche zum Aufliegen, eine weitere Bewegung des Deckels 6 in vertikaler Richtung ist somit nicht mehr möglich, da der Deckel 6 damit in vertikaler Richtung fixiert ist. Mittels des Zapfens wird der Deckel 6 auch zusätzlich in horizontaler Richtung fixiert, so dass lediglich eine Drehbewegung des Deckels 6 möglich ist.To open the oven vessel 4, this is moved relative to the vertically fixed pivot unit 14 in the vertical direction downwards. This is realized by moving the hydraulic cylinders 10 into a retracted state and thereby moving the cradle 8 downwards in the vertical direction, that is, lowering it. By moving down, the oven vessel 4 and the lid 6 is moved down with the cradle 8. The cover 6 is thereby moved as long as until the connecting element 18 comes into engagement in the receptacle 16 of the pivoting unit 14 and the lid 6 is thus suspended in the pivoting unit 14. In this case, therefore, the connecting element 18 comes to rest on the receiving surface, a further movement of the lid 6 in the vertical direction is thus no longer possible, since the cover 6 is thus fixed in the vertical direction. By means of the pin, the lid 6 is also additionally fixed in the horizontal direction, so that only a rotational movement of the lid 6 is possible.

Bei einer weiteren relativen Bewegung der Wiege 8 mit Ofengefäß 4 zur Schwenkeinheit 14 in vertikaler Richtung nach unten wird somit der Deckel 6 nicht mitbewegt. Er bleibt vielmehr in der Aufnahme 16 der Schwenkeinheit 14 fixiert. Durch eine derartige Bewegung wird der Deckel 6 vom Ofengefäß 4 gelöst und hängt somit auskragend an der Schwenkeinheit 14. Eine derartige Situation ist in Fig. 2 dargestellt.In a further relative movement of the cradle 8 with furnace vessel 4 to the pivot unit 14 in the vertical direction down, the cover 6 is thus not moved. Rather, it remains fixed in the receptacle 16 of the pivoting unit 14. By such a movement, the cover 6 is released from the furnace vessel 4 and thus hangs cantilevered on the pivot unit 14. Such a situation is in Fig. 2 shown.

Anschließend kann der Deckel 6 mittels der Schwenkeinheit 14 durch eine Rotationsbewegung um die in vertikaler Richtung verlaufende Achse A vom Ofengefäß 4 wegbewegt werden, wie es in Fig. 3 dargestellt ist. Durch eine derartige Bewegung des Deckels 6 ist dann das Ofengefäß 4 im geöffneten Zustand und kann beispielsweise mit Schrott chargiert werden. Der Deckel 6 befindet sich in dieser Situation seitlich des Ofengefäßes 4.Subsequently, the lid 6 by means of the pivoting unit 14 by a rotational movement about the in the vertical direction extending axis A are moved away from the furnace vessel 4, as in Fig. 3 is shown. By such a movement of the lid 6 then the furnace vessel 4 in the open state and can be charged, for example, with scrap. The lid 6 is in this situation laterally of the furnace vessel. 4

Nach einem Chargieren des Ofengefäßes 4 mit Stahlschrott kann der Deckel 6 dann wieder zum Ofengefäß 4 hin bewegt werden, so dass wiederum die in Fig. 2 dargestellte Situation erreicht wird, bei der der Deckel 6 wieder oberhalb des Ofengefäßes 4 angeordnet ist. Wenn anschließend die Wiege 4 mittels der Hydraulikzylinder 10 in vertikaler Richtung nach oben bewegt wird, wird dabei der Deckel 6 aus der Aufnahme 14 der Schwenkeinheit 16 gehoben und damit die Fixierung in vertikaler Richtung gelöst. Der Deckel 6 ist dann wieder auf den Stützen 12 abstützt, wie es in Fig. 1 dargestellt ist.After charging the furnace vessel 4 with steel scrap, the lid 6 can then be moved back to the furnace vessel 4, so that in turn the in Fig. 2 shown situation is reached, in which the lid 6 is again arranged above the furnace vessel 4. Subsequently, when the cradle 4 is moved upwardly in the vertical direction by means of the hydraulic cylinders 10, the cover 6 is lifted out of the receptacle 14 of the pivoting unit 16, thereby releasing the fixing in the vertical direction. The cover 6 is then supported again on the supports 12, as it is in Fig. 1 is shown.

Durch die erfindungsgemäße Ausgestaltung des Lichtbogenofens 2 ist somit ein Pivot-Zylinder, wie er bei einem aus dem Stand der Technik bekannten Lichtbogenofen erforderlich ist, entbehrlich. Dadurch werden weniger Bauteile benötigt und der Öffnungsprozess des Ofengefäßes 4 vereinfacht.The inventive design of the arc furnace 2 is thus a pivot cylinder, as it is required in an arc furnace known from the prior art, unnecessary. As a result, fewer components are needed and the opening process of the furnace vessel 4 is simplified.

Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.Although the invention has been further illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (6)

  1. Arc furnace (2) having a furnace vessel (4) for melting steel, a cover (6) for closing the furnace vessel (4), and a swivel unit (14) by means of which the cover (6) can be moved away from the furnace vessel (4), having the following configuration:
    a) the furnace vessel (4) is so mounted as to be movable in a vertical direction relative to the swivel unit (14),
    b) the swivel unit (14) has a holder for releasably fixing the cover (6) in a vertical direction.
  2. Arc furnace (2) according to claim 1,
    wherein the furnace vessel (4) is mounted in a cradle (8) which can be moved in a vertical direction.
  3. Arc furnace (2) according to claim 2,
    wherein the cradle (8) can be moved by means of hydraulic cylinders (10).
  4. Arc furnace (2) according to claim 3,
    wherein the cradle (8) has a plurality of hydraulic cylinders (10) which can be activated separately.
  5. Arc furnace (2) according to one of the claims 2 to 4,
    wherein when closing the furnace vessel (4) the cover (6) is supported by struts (12) which are arranged on the cradle (8).
  6. Arc furnace (2) according to one of the preceding claims,
    wherein the cover (6) can be moved away from the furnace vessel (4) by means of the swivel unit (14), employing a rotational movement about an axis (A) which extends in a vertical direction.
EP13729678.6A 2012-07-11 2013-06-12 Arc furnace Active EP2859293B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13729678.6A EP2859293B1 (en) 2012-07-11 2013-06-12 Arc furnace

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12175917.9A EP2685192A1 (en) 2012-07-11 2012-07-11 Arc furnace
PCT/EP2013/062089 WO2014009085A1 (en) 2012-07-11 2013-06-12 Arc furnace
EP13729678.6A EP2859293B1 (en) 2012-07-11 2013-06-12 Arc furnace

Publications (2)

Publication Number Publication Date
EP2859293A1 EP2859293A1 (en) 2015-04-15
EP2859293B1 true EP2859293B1 (en) 2016-08-10

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EP12175917.9A Withdrawn EP2685192A1 (en) 2012-07-11 2012-07-11 Arc furnace
EP13729678.6A Active EP2859293B1 (en) 2012-07-11 2013-06-12 Arc furnace

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US (1) US9657994B2 (en)
EP (2) EP2685192A1 (en)
CN (1) CN104428616B (en)
ES (1) ES2602906T3 (en)
MX (1) MX2015000399A (en)
RU (1) RU2636793C2 (en)
WO (1) WO2014009085A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524767B (en) * 2016-12-30 2018-08-03 中冶赛迪工程技术股份有限公司 A kind of cover-opening structure of scrap steel preheating type electric arc furnaces

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067984B (en) * 1959-10-29
GB102365A (en) * 1916-06-22 1916-11-30 James Keith Improvements in Lids or Covers for Crucible Furnaces.
US2313837A (en) * 1940-03-26 1943-03-16 Nissim Raoul Electric arc furnace with removable hearth or roof
US4123617A (en) * 1977-05-04 1978-10-31 Lectromelt Corporation Electric arc furnace
AT371921B (en) * 1981-10-09 1983-08-10 Voest Alpine Ag ELECTRIC OVEN
DE3514293A1 (en) * 1985-04-19 1986-10-30 Fuchs Systemtechnik GmbH, 7601 Willstätt LIFTING AND SWIVELING DEVICE FOR THE LID OF THE OVEN CASE OF AN ARC FURNACE
AT387350B (en) * 1987-05-15 1989-01-10 Voest Alpine Ag ELECTRIC OVENS, LIKE ARC OVENS OR PLASMA OVENS
ATE89324T1 (en) * 1989-03-02 1993-05-15 Fuchs Technology Ag MELTING UNIT WITH SHAFT-SHAPED CHARGING PRE-HEATER.
AT401304B (en) * 1993-11-04 1996-08-26 Voest Alpine Ind Anlagen LID LIFT FOR A LID TO BE INSTALLED ON A METALLURGICAL VESSEL
DE102006041421A1 (en) * 2006-09-04 2008-03-06 Fuchs Technology Ag Melting furnace, in particular electric arc furnace
DE102010041692A1 (en) * 2010-09-30 2012-04-05 Siemens Aktiengesellschaft Lifting and pivoting device for a lid of a furnace and furnace system and method for charging and maintenance of such a furnace system

Also Published As

Publication number Publication date
EP2859293A1 (en) 2015-04-15
EP2685192A1 (en) 2014-01-15
WO2014009085A1 (en) 2014-01-16
MX2015000399A (en) 2015-03-20
RU2015104340A (en) 2016-08-27
CN104428616A (en) 2015-03-18
US9657994B2 (en) 2017-05-23
ES2602906T3 (en) 2017-02-22
CN104428616B (en) 2016-04-13
US20150139266A1 (en) 2015-05-21
RU2636793C2 (en) 2017-11-28

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