EP2859293A1 - Arc furnace - Google Patents

Arc furnace

Info

Publication number
EP2859293A1
EP2859293A1 EP13729678.6A EP13729678A EP2859293A1 EP 2859293 A1 EP2859293 A1 EP 2859293A1 EP 13729678 A EP13729678 A EP 13729678A EP 2859293 A1 EP2859293 A1 EP 2859293A1
Authority
EP
European Patent Office
Prior art keywords
furnace
lid
furnace vessel
vessel
vertical direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13729678.6A
Other languages
German (de)
French (fr)
Other versions
EP2859293B1 (en
Inventor
Björn Mossmann
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.)
Primetals Technologies Austria GmbH
Original Assignee
SIEMENS VAI METALS TECHNOLOGIES GmbH
Siemens VAI Metals Technologies GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIEMENS VAI METALS TECHNOLOGIES GmbH, Siemens VAI Metals Technologies GmbH Austria filed Critical SIEMENS VAI METALS TECHNOLOGIES GmbH
Priority to EP13729678.6A priority Critical patent/EP2859293B1/en
Publication of EP2859293A1 publication Critical patent/EP2859293A1/en
Application granted granted Critical
Publication of EP2859293B1 publication Critical patent/EP2859293B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

  • 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 the
  • the lid is connected via a pivot cylinder with a pivoting unit, also referred to as a portal.
  • a pivoting unit also referred to as a portal.
  • 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 stored on a cradle which comprises a rolling track provided for this tilting movement.
  • 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, re ⁇ stored the furnace vessel tively to the swivel unit in the vertical direction movable.
  • 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 makes it easier to readjust the electrodes arranged on the pivoting unit.
  • the cover In order to release the cover of the arc furnace from the furnace vessel, the cover is then suspended in the receptacle of the pivoting unit initially by a movement of the furnace vessel relative to the stationary pivoting unit in the vertical direction, so that the cover is fixed in the vertical direction. After hanging a further movement of the Ofenge ⁇ vessel takes place in the vertical direction downwards, so that the lid is detached from the furnace vessel and then can be moved away from the furnace vessel.
  • the inventive design of the arc furnace in particular by the movable in the vertical direction ⁇ tion 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.
  • it is ⁇ sufficient 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 results in an increase in the time of total energy input and thereby higher productivity. This is achieved by the fact that
  • 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 several separately controllable Hydraulikzylin- this can not only be moved in the 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 verti ⁇ len movement of the cradle with the supports and thus also the furnace vessel down so after fixing the
  • Lid in the receptacle of the pivot unit of the lid also released from the supports.
  • the cover is moved away by means of the pivoting unit by a Rota ⁇ tion movement about an axis extending in the vertical direction of the furnace vessel.
  • the lid is therefore characterized moved in the horizontal direction since ⁇ Lich from the furnace vessel.
  • Fig. 1 shows an electric arc furnace with a lid in one position
  • FIG. 2 shows an arc furnace with cover which is fixed on the pivoting unit
  • Fig. 3 shows an electric arc furnace with the lid open.
  • an arc furnace 2 is shown, which has 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 several ⁇ re separately controllable hydraulic cylinder 10 has.
  • the hydraulic cylinders 10 are shown in Fig. 1 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, which support the lid 6 of the arc furnace 2 in the closed state of the furnace vessel 4, as shown in Fig. 1, supported.
  • a portal designated ⁇ designated swing unit 14 is further arranged in a fixed, the 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 shown embodiment by an on ⁇ bearing surface and a pin, in which a entspre ⁇ accordingly shaped connection unit 18 of the lid eingrei ⁇ fen can.
  • 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.
  • the oven vessel 4 and the lid 6 is moved down with the cradle 8.
  • the lid 6 is then moved until the connecting member 18 in the up ⁇ receiver 16 of the pivot unit 14 comes into engagement, and thus the de ekel 6 in the pivot unit 14 is mounted.
  • the connecting member 18 comes on the Recordin ⁇ me Chemistry to rest, a further movement of the cover 6 in the vertical direction is thus no longer possible, since the cover 6 is fixed so that in the vertical direction.
  • the lid 6 is also additionally fixed in the horizontal direction, so that only a rotational movement of the lid 6 is possible.
  • 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 shown in Fig. 3.
  • 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 be moved towards the furnace vessel 4 again, so that again the situation illustrated in FIG. 2 is reached, in which the cover 6 is positioned again above the Ofenge ⁇ fäßes 4. Subsequently, when the cradle 4 is moved by means of the hydraulic cylinder 10 in a vertically upward direction, while the lid is dissolved lifted out of the receptacle 14 of the pivot unit 16 and 6 so that the fixing in Vertika ⁇ ler direction. The cover 6 is then supported again on the supports 12, as shown in Fig. 1.

Landscapes

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

Abstract

The invention relates to an arc furnace (2) having a furnace vessel (4) for melting steel, a cover (6) for closing the furnace vessel (4) and a pivot 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 mounted so as to be movable in the vertical direction relative to the pivot unit (14), and b) the pivot unit (14) has a holder for releasably fixing the cover (6) in the vertical direction.

Description

Beschreibung description
Lichtbogenofen Die Erfindung betrifft einen Lichtbogenofen. Electric arc furnace The invention relates to an electric arc furnace.
Zur Wiederaufarbeitung von Stahlschrott werden Lichtbogenöfen eingesetzt, bei denen der Stahlschrott mit Hilfe einer Elek¬ trode 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 For the reprocessing of scrap steel arc furnaces are used in which the steel scrap by means of an elec trode ¬ and a burning arc heats and is 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 the
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. 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 gela- gert, welche eine für diese Kippbewegung vorgesehene Abroll- bahn 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 stored on a cradle which comprises a rolling track 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 Licht- bogenofen anzugeben, mit dem der Öffnungsvorgang vereinfacht wird . It is an object of the present invention to provide an 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 re¬ lativ 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, re ¬ stored the furnace vessel tively to the swivel unit in the vertical direction movable. 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 verein- facht. 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 makes it easier to readjust 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 un- ten 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 Ofenge¬ fäßes in vertikale Richtung nach unten, so dass der Deckel von dem Ofengefäß gelöst ist und danach vom Ofengefäß wegbe- wegt werden kann. In order to release the cover of the arc furnace from the furnace vessel, the cover is then suspended in the receptacle of the pivoting unit initially by a movement of the furnace vessel relative to the stationary pivoting unit in the vertical direction, so that the cover is fixed in the vertical direction. After hanging a further movement of the Ofenge ¬ vessel takes place in the vertical direction downwards, so that the lid is detached from the furnace vessel and then can be moved away from the furnace vessel.
Durch die erfindungsgemäße Ausgestaltung des Lichtbogenofens, insbesondere durch die in vertikaler Richtung bewegbare Lage¬ rung 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. Des Weiteren wird durch die feststehende Schwenkeinheit er¬ reicht, 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 The inventive design of the arc furnace, in particular by the movable in the vertical direction ¬ tion 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. Furthermore, it is ¬ sufficient 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 results in an increase in the time of total energy input and thereby higher productivity. This is achieved by the fact that
Verbleib des Deckels in horizontaler Lage ein Arbeiten der Elektrodenregelung ermöglicht wird. Whereabouts of the lid in a horizontal position allows working the electrode control.
Bei einer bevorzugten Ausgestaltung der Erfindung ist das Ofengefäß in einer in vertikaler Richtung bewegbaren Wiege gelagert. Eine derartige Wiege kann bevorzugt mittels Hydrau- likzylinder 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 Hydraulikzylin- der 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 several separately controllable Hydraulikzylin- this can not only be moved in the 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 vertika¬ len Bewegung der Wiege mit den Stützen und somit auch des Ofengefäßes nach unten wird also nach der Fixierung des 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 verti ¬ len movement of the cradle with the supports and thus also the furnace vessel down so after fixing the
Deckels in der Aufnahme der Schwenkeinheit der Deckel auch von den Stützen gelöst. Lid in the receptacle of the pivot unit of the lid also released from the supports.
Bei einer weiteren bevorzugten Ausgestaltung der Erfindung wird der Deckel mittels der Schwenkeinheit durch eine Rota¬ tionsbewegung um eine in vertikale Richtung verlaufende Achse vom Ofengefäß wegbewegt. Der Deckel wird dadurch also seit¬ lich vom Ofengefäß in horizontaler Richtung wegbewegt. 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 Ausführungsbei- spiele, die im Zusammenhang mit den Zeichnungen näher erläutert werden. In a further preferred embodiment of the invention, the cover is moved away by means of the pivoting unit by a Rota ¬ tion movement about an axis extending in the vertical direction of the furnace vessel. The lid is therefore characterized moved in the horizontal direction since ¬ Lich from the furnace vessel. The above-described characteristics, features and advantages of this invention, as well as the manner in which they are 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 je- weils in einer schematischen Prinzipskizze: For a further description of the invention reference is made to the embodiments of the drawings. Each of them shows in a schematic outline sketch:
Fig. 1 einen Lichtbogenofen mit Deckel in einer Position Fig. 1 shows an electric arc furnace with a lid in one position
während des Schmelzbetriebs, Fig. 2 einen Lichtbogenofen mit Deckel, der an der Schwenkeinheit fixiert ist,  FIG. 2 shows an arc furnace with cover which is fixed on the pivoting unit, FIG.
Fig. 3 einen Lichtbogenofen mit geöffnetem Deckel. 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. Fig. 3 shows an electric arc furnace with the lid open. In Fig. 1, an arc furnace 2 is shown, which has 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 mehre¬ re 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 Licht- bogenofens 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 bezeich¬ nete 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 Auf¬ lagefläche und einen Zapfen gebildet, in der eine entspre¬ chend ausgeformte Verbindungseinheit 18 des Deckels eingrei¬ fen kann. 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 dieThe furnace vessel 4 is mounted on a cradle 8, which several ¬ re separately controllable hydraulic cylinder 10 has. The hydraulic cylinders 10 are shown in Fig. 1 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, which support the lid 6 of the arc furnace 2 in the closed state of the furnace vessel 4, as shown in Fig. 1, supported. In addition to the cradle 8 and the furnace body 4 as a portal designated ¬ designated swing unit 14 is further arranged in a fixed, the 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 shown embodiment by an on ¬ bearing surface and a pin, in which a entspre ¬ accordingly shaped connection unit 18 of the lid eingrei ¬ fen can. 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 the
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 Auf¬ nahme 16 der Schwenkeinheit 14 zum Eingriff kommt und der De- ekel 6 somit in der Schwenkeinheit 14 eingehängt ist. In die¬ sem Fall kommt also das Verbindungselement 18 auf der Aufnah¬ mefläche 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. Moving down, the oven vessel 4 and the lid 6 is moved down with the cradle 8. The lid 6 is then moved until the connecting member 18 in the up ¬ receiver 16 of the pivot unit 14 comes into engagement, and thus the de ekel 6 in the pivot unit 14 is mounted. In the ¬ sem case, the connecting member 18 comes on the Recordin ¬ mefläche to rest, a further movement of the cover 6 in the vertical direction is thus no longer possible, since the cover 6 is fixed so that 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 Ofenge- fäß 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 downwards, the cover 6 is thus not moved. Rather, it remains fixed in the receptacle 16 of the pivoting unit 14. By such a movement of the lid 6 is detached from the furnace vessel 4 and thus depends cantilevered on the pivot unit 14. Such a situation is shown in Fig. 2.
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 shown in Fig. 3. 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 Ofenge¬ fäßes 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 vertika¬ ler Richtung gelöst. Der Deckel 6 ist dann wieder auf den Stützen 12 abstützt, wie es in Fig. 1 dargestellt ist. After a charging of the furnace vessel 4 with steel scrap, the lid 6 can be moved towards the furnace vessel 4 again, so that again the situation illustrated in FIG. 2 is reached, in which the cover 6 is positioned again above the Ofenge ¬ fäßes 4. Subsequently, when the cradle 4 is moved by means of the hydraulic cylinder 10 in a vertically upward direction, while the lid is dissolved lifted out of the receptacle 14 of the pivot unit 16 and 6 so that the fixing in Vertika ¬ ler direction. The cover 6 is then supported again on the supports 12, as shown in Fig. 1.
Durch die erfindungsgemäße Ausgestaltung des Lichtbogenofens 2 ist somit ein Pivot-Zylinder, wie er bei einem aus demDue to the inventive design of the arc furnace 2 is thus a pivot cylinder, as in one of the
Stand der Technik bekannten Lichtbogenofen erforderlich ist, entbehrlich. Dadurch werden weniger Bauteile benötigt und der Öffnungsprozess des Ofengefäßes 4 vereinfacht. Obwohl die Erfindung im Detail durch das bevorzugte Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele einge¬ schränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen. The prior art known arc furnace is required dispensable. As a result, fewer components are needed and the opening process of the furnace vessel 4 is simplified. Although the invention in detail by the preferred embodiment has been illustrated and described in detail, the invention is not limited ¬ by the disclosed examples and other variations can be derived therefrom by the skilled artisan without departing from the scope of the invention.

Claims

Patentansprüche claims
1. Lichtbogenofen (2) mit einem Ofengefäß (4) zum Schmelzen von Stahl, einem Deckel (6) zum Verschließen des Ofengefäßes (4) und einer Schwenkeinheit (14), mit der der Deckel (6) vom Ofengefäß (4) wegbewegbar ist, mit folgender Ausgestaltung: a) das Ofengefäß (4) ist relativ zur Schwenkeinheit (14) in vertikaler Richtung bewegbar gelagert, 1. electric arc furnace (2) with a furnace vessel (4) for melting steel, a lid (6) for closing the furnace vessel (4) and a pivoting unit (14), with which the lid (6) from the furnace vessel (4) is movable away , with the following configuration: a) the furnace vessel (4) is mounted so as to be movable relative to the pivoting unit (14) in the vertical direction,
b) die Schwenkeinheit (14) weist eine Aufnahme zum lösbaren Fixieren des Deckels (6) in vertikaler Richtung auf. b) the pivoting unit (14) has a receptacle for releasably fixing the cover (6) in the vertical direction.
2. Lichtbogenofen (2) nach Anspruch 1, 2. Arc furnace (2) according to claim 1,
bei dem das Ofengefäß (4) in einer in vertikaler Richtung bewegbaren Wiege (8) gelagert ist. in which the furnace vessel (4) is mounted in a vertically movable cradle (8).
3. Lichtbogenofen (2) nach Anspruch 2, 3. electric arc furnace (2) according to claim 2,
bei dem die Wiege (8) mittels Hydraulikzylinder (10) bewegbar ist . in which the cradle (8) by means of hydraulic cylinder (10) is movable.
4. Lichtbogenofen (2) nach Anspruch 3, 4. electric arc furnace (2) according to claim 3,
bei dem die Wiege (8) mehrere getrennt ansteuerbare Hydrau¬ likzylinder (10) aufweist. in which the cradle (8) has a plurality of separately controllable hydrau ¬ likzylinder (10).
5. Lichtbogenofen (2) nach einem der Ansprüche 2 bis 4, bei dem der Deckel (6) beim Verschließen des Ofengefäßes (4) mittels auf der Wiege (8) angeordneten Stützen (12) abgestützt ist. 5. electric arc furnace (2) according to one of claims 2 to 4, wherein the lid (6) when closing the furnace vessel (4) by means of the cradle (8) arranged supports (12) is supported.
6. Lichtbogenofen (2) nach einem der vorhergehenden Ansprü- che, 6. Electric arc furnace (2) according to one of the preceding claims,
bei dem der Deckel (6) mittels der Schwenkeinheit (14) durch eine Rotationsbewegung um eine in vertikale Richtung verlaufende Achse (A) vom Ofengefäß (4) wegbewegbar ist. in which the cover (6) can be moved away from the furnace vessel (4) by means of the pivoting unit (14) by a rotational movement about an axis (A) extending in the 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 true EP2859293A1 (en) 2015-04-15
EP2859293B1 EP2859293B1 (en) 2016-08-10

Family

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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)

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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

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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
HU209757B (en) * 1989-03-02 1994-10-28 Fuchs Technology Ag Melting aggregate with an arc furnace
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

Non-Patent Citations (1)

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Title
See references of WO2014009085A1 *

Also Published As

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MX2015000399A (en) 2015-03-20
EP2685192A1 (en) 2014-01-15
ES2602906T3 (en) 2017-02-22
RU2015104340A (en) 2016-08-27
WO2014009085A1 (en) 2014-01-16
EP2859293B1 (en) 2016-08-10
US20150139266A1 (en) 2015-05-21
US9657994B2 (en) 2017-05-23
CN104428616A (en) 2015-03-18
RU2636793C2 (en) 2017-11-28
CN104428616B (en) 2016-04-13

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