EP3224560B1 - Cover part of a metallurgical melting vessel - Google Patents

Cover part of a metallurgical melting vessel Download PDF

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Publication number
EP3224560B1
EP3224560B1 EP15771873.5A EP15771873A EP3224560B1 EP 3224560 B1 EP3224560 B1 EP 3224560B1 EP 15771873 A EP15771873 A EP 15771873A EP 3224560 B1 EP3224560 B1 EP 3224560B1
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EP
European Patent Office
Prior art keywords
collar
melting vessel
cover part
collar part
metallurgical melting
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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.)
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EP15771873.5A
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German (de)
French (fr)
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EP3224560A1 (en
Inventor
Dieter Tembergen
Jozef TRIPLAT
Rainer Joachim DITTRICH
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SMS Mevac GmbH
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SMS Mevac GmbH
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Priority to SI201531201T priority Critical patent/SI3224560T1/en
Priority to PL15771873T priority patent/PL3224560T3/en
Publication of EP3224560A1 publication Critical patent/EP3224560A1/en
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    • 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
    • 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
    • C21C7/10—Handling in a vacuum
    • 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

Definitions

  • the invention relates on the one hand to a lid part of a metallurgical melting vessel for covering an opening in a cavity of a pan part of the metallurgical melting vessel.
  • a splash guard in the form of bead elements consisting of a sealing compound is usually provided on the upper edge region.
  • This additional sealing compound can reduce the risk of the lid part caking directly with the pan part.
  • these bead elements must first be applied with a large amount of personnel and, on the other hand, they must also be removed from the metallurgical melting vessel later, together with the processing, which can even increase the cleaning effort.
  • the object of the invention according to independent claim 1 is to further develop generic cover parts of metallurgical melting vessels and related metallurgical melting vessels in such a way that at least the aforementioned disadvantages can be overcome.
  • the object of the invention is achieved on the one hand by a lid part of a metallurgical melting vessel for covering an opening of a cavity of a pan part of the metallurgical melting vessel, the lid part according to the invention having a collar part which can protrude into the cavity of the pan part in order to reduce the risk of fading on the metallurgical melting vessel to reduce.
  • This collar part which protrudes into the cavity, can not only be structurally very simply prevented that the lid part and the pan part bake together critically due to solidified metal melt. Rather, the risk of bear formation per se can be significantly reduced in the present case, as a result of which subsequent cleaning work, both with regard to the lid part and with regard to the pan part, is ideally completely eliminated.
  • a preferred embodiment variant provides that the collar part is designed so as to protrude beyond a socket part contact surface formed on the underside of the cover part such that the collar part projects into the cavity of the socket part when the cover part is properly placed on the socket part.
  • the upper edge region of the socket part can thereby are shielded by foaming and / or splashing parts of the metallic melt, whereby the risk of fogging can be reduced to a minimum.
  • the pan part contact surface is preferably formed by the lower lid edge of the lid part.
  • the length of the collar part is selected such that it is arranged above the metallic melt and does not dip into it.
  • the object of the invention is also achieved by a metallurgical melting vessel with a pan part comprising a cavity for receiving a metallic melt and with a lid part for covering an opening of this cavity solved, in which the cavity is at least partially delimited by a wall of the pan part, wherein according to the invention the metallurgical melting vessel has a spray protection device extending into the cavity with a collar part which, when the cover part is properly placed on the pan part, is at least partially radially inside next to an inner wall side of the wall is arranged.
  • the transition area between the pan part and the lid part is particularly well shielded from splashing metallic melt.
  • the wall of the pan part consists, for example, of a refractory lining. Or this wall is coated with a fireproof spray compound or the like with regard to its inner wall side in order to protect the metallurgical melting vessel in the area of direct contact between the metallic melt and the pan part against excessive thermal stress.
  • bearings on a lance element or the like guided through the cover part from the outside inwards for blowing process gases onto or into the metallic melt can be significantly reduced or, ideally, they can be avoided almost completely.
  • the metallurgical melting vessel can be used excellently in gas inflation processes.
  • the collar part by more than 1/6 or more than 1/4 of the inner wall side height of a wall of the socket part into the cavity of the socket part protrudes, since baking of metallic melt in the transition area between the pan part and the lid part can thereby be prevented.
  • a critical deterioration can almost be ruled out if the collar part protrudes more than 200 mm, preferably more than 500 mm, into the cavity of the pan part.
  • the collar part is arranged at a distance from an inner wall side of the wall of the socket part such that an intermediate space is formed between a collar part outer side of the collar part and an inner wall side of the wall. Heated gas can get into this intermediate space, so that even the uppermost or the most distant edge region of the pan part can be heated well.
  • a particularly preferred embodiment variant provides that the collar part has an outer collar part diameter which is smaller than an inner cavity diameter such that a gas convection space is arranged between an outer collar part side and an inner wall side of a wall of the socket part.
  • the collar part has a sufficiently smaller collar part outer diameter than the cavity inner diameter, good gas convection can always be achieved between the collar part and the wall of the socket part, as a result of which both the upper edge region of the socket part and the collar part can be heated particularly uniformly.
  • a sufficiently large gas convection space between the collar part and the inner wall side of the pan part can be guaranteed if the collar part is spaced from an inner wall side of a pan part wall by more than 100 mm, preferably by more than 200 mm.
  • the collar part is spaced from an inner wall side of a pan part wall by less than 400 mm, preferably by less than 300 mm, it can always be avoided that splashing parts or the like of the metallic melt reach the upper edge region of the pan part.
  • the collar part can be integrated in a structurally simple manner into the metallurgical melting vessel if the collar part is cylindrical and in particular is arranged concentrically around the central axis of the cover part or of the metallurgical melting vessel.
  • the collar part is preferably arranged concentrically around a lance element, such as, for example, around an oxygen lance element or the like, so that not only can the pan and lid part become excellent, but also bear formation in the region of the lance element can be prevented or at least significantly reduced ,
  • the spray protection device or the collar part can be designed in different ways on the metallurgical melting vessel.
  • the spray protection device or the collar part can be realized in a particularly simple construction on the metallurgical melting vessel if the collar part is fixedly arranged on the cover part.
  • the cover part in which the fastening elements consist of chains which are preferably adjustable in length. This ensures that the collar part protrudes into the metallurgical vessel in an optimal manner and to an optimal extent, depending on requirements and / or process control.
  • the collar part is preferably formed in one piece with the cover part.
  • the collar part itself is not formed in one piece, but rather consists of more than one, particularly preferably three or four, preferably uniform collar part elements which, when put together, form a collar part which essentially encloses the entire circumference of the cover part. It is very preferred if a small gap, preferably a gap with a dimension of more than 5 mm, preferably more than 10 mm, remains between these collar part elements in the installed state, in particular thermal expansions of the individual collar part elements, very preferably different thermal expansions across the collar part circumference to record.
  • the collar part elements are attached to the cover part such that a pivoting movement of the collar part elements relative to one another is made possible. In this way it can be achieved that caking or bearings of different thicknesses can easily be compensated for by swiveling the collar part elements apart over the height of the collar part.
  • the collar part is not attached concentrically to the cover part, but rather eccentrically, in order to make it possible to counteract asymmetrically occurring effects on the collar part during operation of the metallurgical vessel.
  • the reaction and / or stirring gases are introduced into the cavity not via a centrally and vertically arranged lance, but rather via a laterally offset and / or obliquely arranged lance, an irregular or at least asymmetrical bath movement takes place within the cavity as well as an asymmetrical reaction behavior of the bath surface, finally also the slag on the bath surface or in relation to splashes emerging from the bath surface.
  • the collar part can also have different wall thicknesses over the entire circumference, in order to counteract, in particular, asymmetrical influences from the process control. Where greater exposure to heat and / or a stronger build-up is to be expected, it may be preferred to provide a thicker design of the collar part, for example a collar part wall that is preferably 10% thicker compared to the smallest wall thickness of the collar part. In this context, an embodiment is particularly preferred in which one or more segments of a collar part segmented over the circumference of the collar part have a different wall thickness than the other collar part segments.
  • pan freeboard for example, both for VD (vacuum degassing) operation and for VOD (vacuum oxygen decarburization) operation.
  • the metallurgical melting vessel 1 shown essentially consists of a pan 9 and a lid part 3, the pan 9 being arranged within a tank 10.
  • the metallurgical melting vessel 1 is, by way of example, a component of a VOD system (not shown here) Use of the metallurgical melting vessel 1 is not limited to such a VOD system.
  • the metallurgical melting vessel 1 serves to produce a metallic melt (not shown), which is located in a cavity 4 of the pan 9.
  • the cavity 4 is accessible at the top 5 of the pan part via an opening 6, this opening 6 being delimited by an upper edge region 7 of the pan 9.
  • the system 2 has a pan 9 with a refractory wall 8, which in turn can withstand the extremely high temperatures of the metallic melt.
  • the pan 9 is arranged inside a tank 10.
  • the wall 8 has an inner wall side 11 which faces the cavity 4.
  • the inner wall side 11 in this case has an inner wall side height 12 which extends from the inner side 13 of the bottom region 14 of the pan part 2 to a support surface 15 for the cover part 3 at the upper edge region 7 of the pan part 2.
  • the cavity 4 also has an internal cavity diameter 16, which in this exemplary embodiment is constant from the base region 14 to the upper edge region 7.
  • the lid part 3 serves to close the pan part 2 or its cavity 4 and accordingly it is placed from above on the upper edge region 7 of the pan part 2 or on the support surface 15 provided there.
  • the metallurgical melting vessel 1 has a spray protection device 25, which in this exemplary embodiment is implemented as a collar part 26, which is formed on the cover part 3 and can protrude into the cavity 4 of the socket part 2.
  • the collar part 26 is here cylindrical in shape on the cover part 3 and in this case extends circularly and concentrically around the central axis 29 of the cover part 3 and also of the metallurgical melting vessel 1
  • the collar part 26 protrudes by about 600 mm beyond the underside 20 of the cover part 3, so that it protrudes far into the cavity 4 when the cover part 3 is properly mounted on the socket part 2 and thus shields the transition region 28 spatially well against the metallic melt.
  • the collar part 26 formed by the cover part 3 is located radially further inward next to the inner wall side 11 of the wall 8 of the pan part 2.
  • the collar part 26 protrudes by approximately 1/6 or more of the inner wall side height 12 of the wall 8 of the pan part 2 into the cavity 4 of this pan part 2, as a result of which in particular the upper edge region 7 of the pan part 2 on the inner wall side 11 from splashing of the metallic melt is well protected.
  • a gas convection chamber 32 which acts effectively in this regard is configured on the metallurgical melting vessel 1, since the collar part 26 has a collar part outer diameter 33 (see Figure 2 ), which is smaller compared to a cavity inner diameter 16 such that the gas convection space 32 is formulated between a collar part outer side 30 and the inner wall side 11 of the socket part 2.
  • the gas convection chamber 32 ensures that, in particular, the upper edge region 7 of the socket part 2 on the one hand and also the collar part 26 on the other hand can heat up particularly uniformly, so that solidification of the metallic melt can be prevented there to a critical extent.
  • the collar part 26 is arranged along its circumference at a constant distance of more than 200 mm, preferably 275 mm, from the inner wall side 11 of the socket part 2.
  • a distance that is variable over the circumference preferably from 200 to 400 mm, can be set for an eccentric arrangement.
  • the uniform heating of the collar part 26 and the upper edge region 7 prevents bear formation both on the outside and on the inside of the collar part 26 and between the inside wall 11 and the collar part 26.
  • a lance element 34 for blowing oxygen can be guided centrally through the cover part 3, which protrudes into the collar part 26, the collar part 26 concentrically surrounding this lance element 34.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

Die Erfindung betrifft einerseits ein Deckelteil eines metallurgischen Schmelzgefäßes zum Abdecken einer Öffnung einer Kavität eines Pfannenteils des metallurgischen Schmelzgefäßes.The invention relates on the one hand to a lid part of a metallurgical melting vessel for covering an opening in a cavity of a pan part of the metallurgical melting vessel.

Gattungsgemäße metallurgische Schmelzgefäße mit einem Pfannenteil zum Aufnehmen einer metallischen Schmelze und mit einem Deckelteil zum Abdecken des Pfannenteils bzw. einer von dem Pfannenteil ausgebildeten Kavität sind aus dem Stand der Technik, wie z.B. aus der US 4,526,353 A , bereits bekannt. Bei einem derartigen metallurgischen Schmelzgefäß besteht oftmals im oberen Randbereich des Pfannenteils, genauer gesagt an seiner Öffnung der Kavität zum Aufnehmen der metallischen Schmelze, das Problem der Bärenbildung. Das heißt, in der Regel gelangen Teile der metallischen Schmelze, etwa in Form von Spritzern, aus dem unteren heißen Bereich des Pfannenteils bis an den meist kühleren Randbereich des Pfannenteils, wobei diese Teile der metallischen Schmelze dort leichter erstarren können und sich dort dann als Verbärung festbacken.Generic metallurgical melting vessels with a pan part for receiving a metallic melt and with a lid part for covering the pan part or a cavity formed by the pan part are from the prior art, such as from US 4,526,353 A , already known. With such a metallurgical melting vessel, there is often the problem of bear formation in the upper edge region of the pan part, more precisely at its opening in the cavity for receiving the metallic melt. This means that parts of the metallic melt, for example in the form of splashes, usually get from the lower hot area of the pan part to the usually cooler edge area of the pan part, these parts of the metallic melt being able to solidify more easily there and then there as a bond fixed bake.

Dies führt häufig dazu, dass das Deckelteil und das Pfannenteil derart stark miteinander verbacken, dass ein Entfernen des Deckelteils von dem Pfannenteil nur sehr schwer möglich ist, oder dass es zu nicht unerheblichen Beschädigungen kommt. Oftmals zieht eine stärkere Verbärung eine weitreichende bzw. irreversible Zerstörung insbesondere des Deckelteils nach sich, so dass dieses vollständig ersetzt werden muss. Im Falle einer Wiederverwertbarkeit muss das metallurgische Gefäß jedoch zwingend von der Verbärung befreit und aufwändig gereinigt werden. Dies bindet nicht nur Personal, sondern ist darüber hinaus auch sehr zeitaufwändig.This often leads to the lid part and the pan part baking together to such an extent that it is very difficult to remove the lid part from the pan part, or that there is considerable damage. Often, a greater degree of deterioration leads to extensive or irreversible destruction, in particular of the cover part, so that it has to be completely replaced. In the event of reusability, however, the metallurgical vessel must be freed from the fermentation and laboriously cleaned. This not only binds staff, but is also very time-consuming.

Um das metallurgische Schmelzgefäß vor den negativen Folgen einer Verbärung besser schützen zu können, wird an dem oberen Randbereich meistens ein Spritzschutz in Gestalt von aus einer Dichtungsmasse bestehenden Wulstelementen vorgesehen. Zwar kann durch diese zusätzliche Dichtungsmasse die Gefahr eines direkten Verbackens des Deckelteils mit dem Pfannenteil reduziert werden. Jedoch müssen diese Wulstelemente einerseits erst einmal mit großem Personalaufwand aufgetragen und andererseits mitsamt der Verbärung später zusätzlich von dem metallurgischen Schmelzgefäß entfernt werden, wodurch sich der Reinigungsaufwand sogar noch erhöhen kann.In order to be able to better protect the metallurgical melting vessel from the negative consequences of fermentation, a splash guard in the form of bead elements consisting of a sealing compound is usually provided on the upper edge region. This additional sealing compound can reduce the risk of the lid part caking directly with the pan part. However, on the one hand, these bead elements must first be applied with a large amount of personnel and, on the other hand, they must also be removed from the metallurgical melting vessel later, together with the processing, which can even increase the cleaning effort.

Der Erfindung gemäss dem unabhängigem Anspruch 1 liegt die Aufgabe zugrunde, gattungsgemäße Deckelteile von metallurgischen Schmelzgefäßen sowie diesbezügliche metallurgischen Schmelzgefäße derart weiterzuentwickeln, dass zumindest die vorgenannten Nachteile überwunden werden können.The object of the invention according to independent claim 1 is to further develop generic cover parts of metallurgical melting vessels and related metallurgical melting vessels in such a way that at least the aforementioned disadvantages can be overcome.

Die Aufgabe der Erfindung wird zum einen von einem Deckelteil eines metallurgischen Schmelzgefäßes zum Abdecken einer Öffnung einer Kavität eines Pfannenteils des metallurgischen Schmelzgefäßes gelöst, wobei erfindungsgemäß das Deckelteil ein bis in die Kavität des Pfannenteils hineinragbares Kragenteil aufweist, um die Gefahr einer Verbärung an dem metallurgischen Schmelzgefäß zu reduzieren.The object of the invention is achieved on the one hand by a lid part of a metallurgical melting vessel for covering an opening of a cavity of a pan part of the metallurgical melting vessel, the lid part according to the invention having a collar part which can protrude into the cavity of the pan part in order to reduce the risk of fading on the metallurgical melting vessel to reduce.

Durch dieses bis in die Kavität hineinragende Kragenteil kann konstruktiv sehr einfach nicht nur verhindert werden, dass das Deckelteil und das Pfannenteil durch erstarrte metallische Schmelze miteinander kritisch verbacken. Vielmehr kann vorliegend die Gefahr einer Bärenbildung an sich signifikant reduziert werden, wodurch nachträgliche Reinigungsarbeiten sowohl hinsichtlich des Deckelteils als auch hinsichtlich des Pfannenteils idealerweise vollständig entfallen.This collar part, which protrudes into the cavity, can not only be structurally very simply prevented that the lid part and the pan part bake together critically due to solidified metal melt. Rather, the risk of bear formation per se can be significantly reduced in the present case, as a result of which subsequent cleaning work, both with regard to the lid part and with regard to the pan part, is ideally completely eliminated.

Eine bevorzugte Ausführungsvariante sieht vor, dass das Kragenteil über eine an der Unterseite des Deckelteils ausgebildeten Pfannenteil-Anlagenfläche derart hinausragend ausgestaltet ist, dass das Kragenteil bei ordnungsgemäß auf das Pfannenteil aufgesetztem Deckelteil bis in die Kavität des Pfannenteils hineinragt Hierdurch kann insbesondere der obere Randbereich des Pfannenteils durch aufschäumende und/oder spritzende Teile der metallischen Schmelze abgeschirmt werden, wodurch dort die Gefahr der Verbärung bis auf ein Minimum reduziert werden kann.A preferred embodiment variant provides that the collar part is designed so as to protrude beyond a socket part contact surface formed on the underside of the cover part such that the collar part projects into the cavity of the socket part when the cover part is properly placed on the socket part. In particular, the upper edge region of the socket part can thereby are shielded by foaming and / or splashing parts of the metallic melt, whereby the risk of fogging can be reduced to a minimum.

Die Pfannenteil-Anlagenfläche ist hierbei bevorzugt durch den unteren Deckelrand des Deckelteils ausgebildet.The pan part contact surface is preferably formed by the lower lid edge of the lid part.

Es versteht sich, dass eine gute Reduzierung der Verbärung bereits durch ein minimal bis in die Kavität hineinragendes Kragenteil erreicht werden kann.It goes without saying that a good reduction in the amount of pigmentation can be achieved by a collar part that extends minimally into the cavity.

Hierbei ist die Länge des Kragenteils derart gewählt, dass es oberhalb der metallischen Schmelze angeordnet ist und in diese nicht eintaucht.Here, the length of the collar part is selected such that it is arranged above the metallic melt and does not dip into it.

Besonders betriebssicher kann eine kritische Verbärung unterbunden werden, wenn das Kragenteil mehr als 200 mm, vorzugsweise mehr als 500 mm, über die Unterseite des Deckelteils hinauskragt.Critical deterioration can be prevented in a particularly reliable manner if the collar part projects more than 200 mm, preferably more than 500 mm, beyond the underside of the cover part.

Die Aufgabe der Erfindung wird auch von einem metallurgischen Schmelzgefäß mit einem eine Kavität zum Aufnehmen einer metallischen Schmelze umfassenden Pfannenteil und mit einem Deckelteil zum Abdecken einer Öffnung dieser Kavität gelöst, bei welchem die Kavität von einer Wandung des Pfannenteils zumindest teilweise begrenzt ist, wobei erfindungsgemäß das metallurgische Schmelzgefäß eine bis in die Kavität hineinreichende Spritzschutzeinrichtung mit einem Kragenteil aufweist, welches bei ordnungsgemäß auf das Pfannenteil aufgesetztem Deckelteil zumindest teilweise radial innen neben einer Innenwandseite der Wandung angeordnet ist.The object of the invention is also achieved by a metallurgical melting vessel with a pan part comprising a cavity for receiving a metallic melt and with a lid part for covering an opening of this cavity solved, in which the cavity is at least partially delimited by a wall of the pan part, wherein according to the invention the metallurgical melting vessel has a spray protection device extending into the cavity with a collar part which, when the cover part is properly placed on the pan part, is at least partially radially inside next to an inner wall side of the wall is arranged.

Ist das Kragenteil zumindest bereichsweise innen radial neben der Innenwandseite der Wandung des Pfannenteils angeordnet, wird insbesondere der Übergangsbereich zwischen dem Pfannenteil und dem Deckelteil besonders gut vor umherspritzender metallischer Schmelze abgeschirmt.If the collar part is at least partially arranged radially on the inside next to the inner wall side of the wall of the pan part, the transition area between the pan part and the lid part is particularly well shielded from splashing metallic melt.

Die Wandung des Pfannenteils besteht beispielsweise aus einer feuerfesten Ausmauerung. Oder diese Wandung ist hinsichtlich ihrer Innenwandseite mit einer feuerfesten Spritzmasse oder dergleichen beschichtet, um das metallurgische Schmelzgefäß im Bereich des direkten Kontaktes zwischen metallischer Schmelze und Pfannenteil vor einer zu hohen thermischen Belastung zu schützen.The wall of the pan part consists, for example, of a refractory lining. Or this wall is coated with a fireproof spray compound or the like with regard to its inner wall side in order to protect the metallurgical melting vessel in the area of direct contact between the metallic melt and the pan part against excessive thermal stress.

Darüber hinaus können auch Verbärungen an einem durch das Deckelteil von außen nach innen geführten Lanzenelement oder dergleichen zum Einblasen von Prozessgasen auf oder in die metallische Schmelze signifikant reduziert werden oder sie können idealerweise nahezu vollständig vermieden werden.In addition, bearings on a lance element or the like guided through the cover part from the outside inwards for blowing process gases onto or into the metallic melt can be significantly reduced or, ideally, they can be avoided almost completely.

Insbesondere das metallurgische Schmelzgefäß kann bei Gasaufblasverfahren hervorragend eingesetzt werden.In particular, the metallurgical melting vessel can be used excellently in gas inflation processes.

An dieser Stelle sei angemerkt, dass hinsichtlich der nachfolgenden vorteilhaften Ausgestaltungen vorausgesetzt ist, dass das Deckelteil ordnungsgemäß auf dem Pfannenteil aufgesetzt ist.At this point it should be noted that with regard to the following advantageous configurations, it is assumed that the cover part is properly placed on the pan part.

Vorteilhaft ist es, wenn das Kragenteil um mehr als 1/6 oder mehr als 1/4 der Innenwandseitenhöhe einer Wandung des Pfannenteils bis in die Kavität des Pfannenteils hineinragt, da hierdurch ein Anbacken von metallischer Schmelze in dem Übergangsbereich zwischen Pfannenteil und Deckelteil gut verhindert werden kann.It is advantageous if the collar part by more than 1/6 or more than 1/4 of the inner wall side height of a wall of the socket part into the cavity of the socket part protrudes, since baking of metallic melt in the transition area between the pan part and the lid part can thereby be prevented.

Eine kritische Verbärung kann nahezu ausgeschlossen werden, wenn das Kragenteil mehr als 200 mm, vorzugsweise mehr als 500 mm, bis in die Kavität des Pfannenteils hineinkragt.A critical deterioration can almost be ruled out if the collar part protrudes more than 200 mm, preferably more than 500 mm, into the cavity of the pan part.

Besonders zweckmäßig ist es, wenn das Kragenteil derart von einer Innenwandseite der Wandung des Pfannenteils beabstandet angeordnet ist, dass zwischen einer Kragenteilaußenseite des Kragenteils und einer Innenwandseite der Wandung ein Zwischenraum ausgebildet ist. In diesem Zwischenraum kann erhitztes Gas gelangen, so dass selbst der oberste bzw. der weitest von der metallischen Schmelze entfernte Randbereich des Pfannenteils gut erhitzt werden kann.It is particularly expedient if the collar part is arranged at a distance from an inner wall side of the wall of the socket part such that an intermediate space is formed between a collar part outer side of the collar part and an inner wall side of the wall. Heated gas can get into this intermediate space, so that even the uppermost or the most distant edge region of the pan part can be heated well.

Insofern sieht eine besonders bevorzugte Ausführungsvariante vor, dass das Kragenteil einen Kragenteilaußendurchmesser aufweist, welcher gegenüber einem Kavitätsinnendurchmesser derart geringer ist, dass zwischen einer Kragenteilaußenseite und einer Innenwandseite einer Wandung des Pfannenteils ein Gaskonvektionsraum angeordnet ist.In this respect, a particularly preferred embodiment variant provides that the collar part has an outer collar part diameter which is smaller than an inner cavity diameter such that a gas convection space is arranged between an outer collar part side and an inner wall side of a wall of the socket part.

Weist das Kragenteil gegenüber dem Kavitätsinnendurchmesser einen ausreichend geringeren Kragenteilaußendurchmesser, kann immer eine gute Gaskonvektion zwischen dem Kragenteil und der Wandung des Pfannenteils erzielt werden, wodurch sowohl der obere Randbereich des Pfannenteils als auch das Kragenteil besonders gleichmäßig erhitzt werden können.If the collar part has a sufficiently smaller collar part outer diameter than the cavity inner diameter, good gas convection can always be achieved between the collar part and the wall of the socket part, as a result of which both the upper edge region of the socket part and the collar part can be heated particularly uniformly.

Es versteht sich, dass der Abstand zwischen dem Kragenteil und der Innenwandseite des Pfannenteils unterschiedlich gewählt sein kann.It goes without saying that the distance between the collar part and the inner wall side of the pan part can be chosen differently.

Ein stets ausreichend groß bemessener Gaskonvektionsraum zwischen dem Kragenteil und der Innenwandseite des Pfannenteils kann garantiert werden, wenn das Kragenteil von einer Innenwandseite einer Pfannenteilwandung um mehr als 100 mm, vorzugsweise um mehr als 200 mm, beabstandet ist.A sufficiently large gas convection space between the collar part and the inner wall side of the pan part can be guaranteed if the collar part is spaced from an inner wall side of a pan part wall by more than 100 mm, preferably by more than 200 mm.

Ist das Kragenteil von einer Innenwandseite einer Pfannenteilwandung um weniger als 400 mm, vorzugsweise um weniger als 300 mm, beabstandet, kann stets gut vermieden werden, dass aufspritzende Teile oder dergleichen der metallischen Schmelze bis an den oberen Randbereich des Pfannenteils gelangen.If the collar part is spaced from an inner wall side of a pan part wall by less than 400 mm, preferably by less than 300 mm, it can always be avoided that splashing parts or the like of the metallic melt reach the upper edge region of the pan part.

Konstruktiv einfach kann das Kragenteil in das metallurgische Schmelzgefäß integriert werden, wenn das Kragenteil zylinderförmig ausgestaltet ist und insbesondere konzentrisch um die Mittelachse des Deckelteils bzw. des metallurgischen Schmelzgefäßes angeordnet ist.The collar part can be integrated in a structurally simple manner into the metallurgical melting vessel if the collar part is cylindrical and in particular is arranged concentrically around the central axis of the cover part or of the metallurgical melting vessel.

Bevorzugt ist das Kragenteil konzentrisch um ein Lanzenelement, wie etwa um ein Sauerstofflanzenelement oder dergleichen, herum angeordnet, so dass nicht nur hervorragend eine Verbärung des Pfannen- und Deckelteils sondern darüber hinaus auch eine Bärenbildung im Bereich des Lanzenelements unterbunden bzw. zumindest signifikant reduziert werden kann.The collar part is preferably arranged concentrically around a lance element, such as, for example, around an oxygen lance element or the like, so that not only can the pan and lid part become excellent, but also bear formation in the region of the lance element can be prevented or at least significantly reduced ,

Es versteht sich, dass die Spritzschutzeinrichtung bzw. das Kragenteil konstruktiv in unterschiedlicher Weise an dem metallurgischen Schmelzgefäß ausgestaltet sein kann.It goes without saying that the spray protection device or the collar part can be designed in different ways on the metallurgical melting vessel.

Baulich besonders einfach kann die Spritzschutzeinrichtung bzw. das Kragenteil an dem metallurgischen Schmelzgefäß realisiert werden, wenn das Kragenteil an dem Deckelteil fest angeordnet ist.The spray protection device or the collar part can be realized in a particularly simple construction on the metallurgical melting vessel if the collar part is fixedly arranged on the cover part.

Hierbei ist es möglich, das Kragenteil fest, aber lösbar an dem Deckelteil zu befestigen. Eine derartige Befestigung des Kragenteils am Deckelteil erfolgt über ein oder mehrere Befestigungselemente, die senkrecht vom Deckelteil nach unten ragend an den Kragenteil angeordnet sind. Diese Befestigungselemente sind in ihrer Länge einstellbar ausgelegt, oder in einer alternativen Ausführungsform sind die Befestigungselemente durch Befestigungselemente einer anderen Länge austauschbar.It is possible to fix the collar part firmly but releasably to the cover part. Such a fastening of the collar part to the cover part takes place via one or more fastening elements which are arranged so that they project vertically downward from the cover part to the collar part. The length of these fasteners is adjustable designed, or in an alternative embodiment, the fasteners are interchangeable with fasteners of a different length.

Ebenso bevorzugt wird eine Ausführungsform des Deckelteils, bei dem die Befestigungselemente aus vorzugsweise in der Länge einstellbaren Ketten bestehen. Hierdurch wird gewährleistet, dass das Kragenteil je nach Bedarf und / oder Prozessführung in einer optimalen Weise und in einem optimalen Maß in das metallurgische Gefäß hineinragt.Also preferred is an embodiment of the cover part in which the fastening elements consist of chains which are preferably adjustable in length. This ensures that the collar part protrudes into the metallurgical vessel in an optimal manner and to an optimal extent, depending on requirements and / or process control.

Bevorzugt ist das Kragenteil jedoch einstückig mit dem Deckelteil ausgebildet.However, the collar part is preferably formed in one piece with the cover part.

In einer weiteren bevorzugten Ausführungsform der Erfindung ist das Kragenteil selbst nicht einstückig ausgebildet, sondern besteht aus mehr als einem, insbesondere bevorzugt drei oder vier, vorzugsweise gleichförmigen Kragenteilelementen, die zusammengesetzt ein Kragenteil bilden, das im Wesentlichen den gesamten Umfang des Deckelteils umschließt. Überaus bevorzugt wird, wenn zwischen diesen Kragenteilelementen im Einbauzustand ein kleiner Spalt, vorzugsweise ein Spalt mit einem Maß von über 5 mm, vorzugsweise über 10 mm, verbleibt, um so insbesondere Wärmeausdehnungen der einzelnen Kragenteilelemente, überaus bevorzugt über den Kragenteil-Umfang hinweg unterschiedliche Wärmeausdehnungen, aufzunehmen.In a further preferred embodiment of the invention, the collar part itself is not formed in one piece, but rather consists of more than one, particularly preferably three or four, preferably uniform collar part elements which, when put together, form a collar part which essentially encloses the entire circumference of the cover part. It is very preferred if a small gap, preferably a gap with a dimension of more than 5 mm, preferably more than 10 mm, remains between these collar part elements in the installed state, in particular thermal expansions of the individual collar part elements, very preferably different thermal expansions across the collar part circumference to record.

Ebenso kann bevorzugt sein, wenn die Kragenteilelemente so an dem Deckelteil angebracht sind, dass eine Schwenkbewegung der Kragenteilelemente zueinander ermöglicht wird. Hierdurch kann erreicht werden, dass über die Höhe des Kragenteils unterschiedlich starke Anbackungen oder Verbärungen leicht durch Auseinanderschwenken der Kragenteilelemente voneinander ausgeglichen werden können.It can also be preferred if the collar part elements are attached to the cover part such that a pivoting movement of the collar part elements relative to one another is made possible. In this way it can be achieved that caking or bearings of different thicknesses can easily be compensated for by swiveling the collar part elements apart over the height of the collar part.

In einer weiteren bevorzugten Ausführungsform der Erfindung ist der Kragenteil nicht konzentrisch am Deckelteil angebracht, sondern exzentrisch, um so zu ermöglichen, beim Betrieb des metallurgischen Gefäßes unsymmetrisch auftretenden Einwirkungen auf das Kragenteil zu begegnen. Insbesondere dann, wenn in einem Aufblasverfahren die Reaktions- und / oder Rührgase nicht über eine zentral und senkrecht angeordnete Lanze, sondern über eine seitlich versetzt und / oder schräg angeordnete Lanze in die Kavität eingebracht werden, erfolgt eine innerhalb der Kavität ungleichmäßige oder zumindest unsymmetrische Badbewegung sowie ein unsymmetrisches Reaktionsverhalten der Badoberfläche, schließlich auch der auf der Badoberfläche befindlichen Schlacke oder in Bezug auf aus der Badoberfläche austretende Spritzer. Diesen unsymmetrischen Einflüssen kann mittels eines gezielt exzentrisch angeordneten Kragenteils mit besonders einfachen Mitteln begegnet werden.In a further preferred embodiment of the invention, the collar part is not attached concentrically to the cover part, but rather eccentrically, in order to make it possible to counteract asymmetrically occurring effects on the collar part during operation of the metallurgical vessel. In particular, if the reaction and / or stirring gases are introduced into the cavity not via a centrally and vertically arranged lance, but rather via a laterally offset and / or obliquely arranged lance, an irregular or at least asymmetrical bath movement takes place within the cavity as well as an asymmetrical reaction behavior of the bath surface, finally also the slag on the bath surface or in relation to splashes emerging from the bath surface. These asymmetrical influences can be countered with particularly simple means by means of a collar part that is specifically eccentrically arranged.

Das Kragenteil kann auch unterschiedliche Wandstärken über den gesamten Umfang aufweisen, um insbesondere unsymmetrisch einwirkenden Einflüssen aus der Prozessführung zu begegnen. Dort, wo eine größere Wärmeeinwirkung und / oder eine stärkere Verbärung zu erwarten ist, kann bevorzugt sein, eine stärkere Ausführung des Kragenteils vorzusehen, beispielsweise eine um 10 vorzugsweise 20 % dickere Kragenteilwandung verglichen mit der geringsten Wandstärke des Kragenteils. Besonders bevorzugt wird in diesem Zusammenhang eine Ausführungsform, bei der ein oder mehrere Segmente eines über den Umfang des Kragenteils segmentierten Kragenteils eine andere Wandstärke aufweisen als die übrigen Kragenteilsegmente.The collar part can also have different wall thicknesses over the entire circumference, in order to counteract, in particular, asymmetrical influences from the process control. Where greater exposure to heat and / or a stronger build-up is to be expected, it may be preferred to provide a thicker design of the collar part, for example a collar part wall that is preferably 10% thicker compared to the smallest wall thickness of the collar part. In this context, an embodiment is particularly preferred in which one or more segments of a collar part segmented over the circumference of the collar part have a different wall thickness than the other collar part segments.

An dieser Stelle sei nochmals gesagt, dass durch die gleichmäßige Erhitzung des Kragenteils und des oberen Randbereichs eine Bärenbildung sowohl außen als auch innen am Kragenteil sowie zwischen der Innenseitenwand des Pfannenteils und der Außenseite des Kragenteils unterbunden ist.At this point it should be said again that the uniform heating of the collar part and the upper edge area prevents bear formation both outside and inside on the collar part and between the inside wall of the pan part and the outside of the collar part.

Hierdurch reduzieren sich die Vorarbeiten und Nacharbeiten an dem metallurgischen Schmelzgefäß hinsichtlich einer Aufgabe einer Dichtungsmasse, einer Reinigung des Deckelteils und des Pfannenteils usw. erheblich, wodurch eine Zeitersparnis von mindestens 30 min und mehr erzielt werden kann.As a result, the preparatory work and rework on the metallurgical melting vessel with regard to the task of a sealing compound, cleaning of the lid part and the pan part etc. are considerably reduced, whereby time savings of at least 30 minutes and more can be achieved.

Des Weiteren ist vorliegend vorteilhafterweise auch eine Reduzierung des Pfannenteilfreibordes beispielsweise sowohl für den VD(vacuum degassing)-Betrieb als auch für VOD(vacuum oxygen decarburization)-Betrieb möglich.Furthermore, in the present case, it is advantageously also possible to reduce the pan freeboard, for example, both for VD (vacuum degassing) operation and for VOD (vacuum oxygen decarburization) operation.

Weitere Merkmale, Effekte und Vorteile vorliegender Erfindung werden anhand anliegender Zeichnung und nachfolgender Beschreibung erläutert, in welchen beispielhaft ein metallurgisches Schmelzgefäß mit einem an einem Deckelteil des Schmelzgefäßes befestigten und in ein Pfannenteil des Schmelzgefäßes weit hineinragenden Kragenteil dargestellt und beschrieben ist.Further features, effects and advantages of the present invention are explained with reference to the attached drawing and the following description, in which, by way of example, a metallurgical melting vessel with a collar part fastened to a cover part of the melting vessel and projecting far into a pan part of the melting vessel is shown and described.

In der Zeichnung zeigen:

Figur 1
schematisch eine erste längsgeschnittene Ansicht eines metallurgischen Schmelzgefäßes mit einem Pfannenteil und einem hiervon abgehobenen Deckelteil umfassend ein in das Pfannenteil hineinragbares Kragenteil ; und
Figur 2
schematisch eine weitere längsgeschnittene Ansicht des in der Figur 1 gezeigten metallurgischen Schmelzgefäßes mit dem in das Pfannenteil weit hineinkragenden Kragenteil.
The drawing shows:
Figure 1
schematically shows a first longitudinally sectioned view of a metallurgical melting vessel with a pan part and a lid part lifted therefrom, comprising a collar part which can protrude into the pan part; and
Figure 2
schematically shows a further longitudinal section of the in the Figure 1 Metallurgical melting vessel shown with the collar part projecting far into the pan part.

Das in den Figuren 1 und 2 gezeigte metallurgische Schmelzgefäß 1 besteht im Wesentlichen aus einer Pfanne 9 und einem Deckelteil 3, wobei die Pfanne 9 innerhalb eines Tanks 10 angeordnet ist.That in the Figures 1 and 2 The metallurgical melting vessel 1 shown essentially consists of a pan 9 and a lid part 3, the pan 9 being arranged within a tank 10.

In diesem Ausführungsbeispiel ist das metallurgische Schmelzgefäß 1 beispielhaft eine Komponente einer hier nicht gezeigten VOD-Anlage, wobei sich jedoch der Einsatz des metallurgischen Schmelzgefäßes 1 auf eine derartige VOD-Anlage nicht beschränkt.In this exemplary embodiment, the metallurgical melting vessel 1 is, by way of example, a component of a VOD system (not shown here) Use of the metallurgical melting vessel 1 is not limited to such a VOD system.

Das metallurgische Schmelzgefäß 1 dient zum Erzeugen einer metallischen Schmelze (nicht gezeigt), welche sich in einer Kavität 4 der Pfanne 9 befindet. Die Kavität 4 ist an der Oberseite 5 des Pfannenteils über eine Öffnung 6 zugänglich, wobei diese Öffnung 6 durch einen oberen Randbereich 7 der Pfanne 9 begrenzt ist.The metallurgical melting vessel 1 serves to produce a metallic melt (not shown), which is located in a cavity 4 of the pan 9. The cavity 4 is accessible at the top 5 of the pan part via an opening 6, this opening 6 being delimited by an upper edge region 7 of the pan 9.

Die Anlage 2 weist eine Pfanne 9 mit einer feuerfesten Wandung 8 auf, welche wiederum den extrem hohen Temperaturen der metallischen Schmelze standhalten kann. Die Pfanne 9 ist innerhalb eines Tanks 10 angeordnet.The system 2 has a pan 9 with a refractory wall 8, which in turn can withstand the extremely high temperatures of the metallic melt. The pan 9 is arranged inside a tank 10.

Die Wandung 8 weist eine Innenwandseite 11 auf, welche der Kavität 4 zugewandt ist. Die Innenwandseite 11 weist hierbei eine Innenwandseitenhöhe 12 auf, welche von der Innenseite 13 des Bodenbereichs 14 des Pfannenteils 2 bis zu einer Auflagefläche 15 für das Deckelteil 3 am oberen Randbereich 7 des Pfannenteils 2 reicht.The wall 8 has an inner wall side 11 which faces the cavity 4. The inner wall side 11 in this case has an inner wall side height 12 which extends from the inner side 13 of the bottom region 14 of the pan part 2 to a support surface 15 for the cover part 3 at the upper edge region 7 of the pan part 2.

Darüber hinaus weist die Kavität 4 noch einen Kavitätsinnendurchmesser 16 auf, der in diesem Ausführungsbeispiel vom Bodenbereich 14 bis zum oberen Randbereich 7 konstant ist.In addition, the cavity 4 also has an internal cavity diameter 16, which in this exemplary embodiment is constant from the base region 14 to the upper edge region 7.

Das Deckelteil 3 dient zum Verschließen des Pfannenteils 2 bzw. seiner Kavität 4 und es wird dementsprechend von oben auf dem oberen Randbereich 7 des Pfannenteils 2 bzw. auf der dort vorgesehenen Auflagefläche 15 aufgesetzt.The lid part 3 serves to close the pan part 2 or its cavity 4 and accordingly it is placed from above on the upper edge region 7 of the pan part 2 or on the support surface 15 provided there.

Erfindungsgemäß weist das metallurgische Schmelzgefäß 1 eine Spritzschutzeinrichtung 25 auf, welche in diesem Ausführungsbeispiel als ein an dem Deckelteil 3 ausgebildetes in die Kavität 4 des Pfannenteils 2 hineinkragbares Kragenteil 26 realisiert ist.According to the invention, the metallurgical melting vessel 1 has a spray protection device 25, which in this exemplary embodiment is implemented as a collar part 26, which is formed on the cover part 3 and can protrude into the cavity 4 of the socket part 2.

Mittels dieses an der dem Pfannenteil 2 zugewandten Seite 27 des Deckelteils 3 angeordneten Kragenteils 26 ist die Gefahr einer Verbärung im oberen Bereich der Pfanne und insbesondere an einem Übergangsbereich 28 zwischen dem Pfannenteil 2 und dem Deckelteil 3 nahezu ausgeschlossen, zumindest aber gegenüber dem Stand der Technik signifikant reduziert.By means of this collar part 26 arranged on the side 27 of the cover part 3 facing the pan part 2, the risk of fogging in the upper region of the pan and in particular at a transition region 28 between the pan part 2 and the cover part 3 is almost excluded, at least in comparison to the prior art significantly reduced.

Das Kragenteil 26 ist hierbei zylinderförmig an dem Deckelteil 3 ausgestaltet und es erstreckt sich hierbei kreisförmig und konzentrisch um die Mittelachse 29 des Deckelteils 3 und auch des metallurgischen Schmelzgefäßes 1 herumThe collar part 26 is here cylindrical in shape on the cover part 3 and in this case extends circularly and concentrically around the central axis 29 of the cover part 3 and also of the metallurgical melting vessel 1

Das Kragenteil 26 kragt hierbei um ca. 600 mm über die Unterseite 20 des Deckelteils 3 hinaus, so dass es bei ordnungsgemäß auf dem Pfannenteil 2 montiertem Deckelteil 3 weit in die Kavität 4 hineinkragt und somit den Übergangsbereich 28 räumlich gut gegenüber der metallischen Schmelze abschirmt.The collar part 26 protrudes by about 600 mm beyond the underside 20 of the cover part 3, so that it protrudes far into the cavity 4 when the cover part 3 is properly mounted on the socket part 2 and thus shields the transition region 28 spatially well against the metallic melt.

Hierbei befindet sich das durch das Deckelteil 3 ausgebildete Kragenteil 26 radial weiter innen neben der Innenwandseite 11 der Wandung 8 des Pfannenteils 2.Here, the collar part 26 formed by the cover part 3 is located radially further inward next to the inner wall side 11 of the wall 8 of the pan part 2.

Insofern kragt das Kragenteil 26 um ca. 1/6 oder mehr der Innenwandseitenhöhe 12 der Wandung 8 des Pfannenteils 2 in die Kavität 4 dieses Pfannenteils 2 hinein, wodurch insbesondere der obere Randbereich 7 des Pfannenteils 2 an der Innenwandseite 11 vor einem Spritzern der metallischen Schmelze gut geschützt ist.In this respect, the collar part 26 protrudes by approximately 1/6 or more of the inner wall side height 12 of the wall 8 of the pan part 2 into the cavity 4 of this pan part 2, as a result of which in particular the upper edge region 7 of the pan part 2 on the inner wall side 11 from splashing of the metallic melt is well protected.

Wie insbesondere aus der Darstellung gemäß der Figur 2 gut ersichtlich ist, befindet sich zwischen einer Kragenteilaußenseite 30 des Kragenteils 26 und der Innenwandseite 11 der Wandung 8 ein Zwischenraum 31, in welchen hinein heiße, sich in der Kavität 4 befindliche Gase (hier nicht beziffert) aufsteigen können, so dass auch der obere Randbereich 7 des Pfannenteils 2 schnell und derart betriebssicher aufgeheizt werden kann, dass dort hin gespritzte Teile der metallischen Schmelze dort nicht auskühlen können, sondern wieder zurück ins Schmelzbad fließen bzw. abtropfen. Speziell hierdurch kann die Bärenbildung an dem oberen Randbereich 7 besonders effektiv unterbunden werden.As in particular from the representation according to the Figure 2 is clearly visible, there is an intermediate space 31 between a collar part outer side 30 of the collar part 26 and the inner wall side 11 of the wall 8, into which hot gases located in the cavity 4 (not numbered here) can rise, so that the upper edge area as well 7 of the pan part 2 can be heated quickly and in such a reliable manner that parts of the metallic melt sprayed there cannot cool down, but instead flow back into the melt pool or drip off. In this way in particular, the formation of bears at the upper edge region 7 can be prevented particularly effectively.

Ein diesbezüglich effektiv wirkender Gaskonvektionsraum 32 ist an dem metallurgischen Schmelzgefäß 1 ausgestaltet, da das Kragenteil 26 einen Kragenteilaußendurchmesser 33 (siehe Figur 2) aufweist, welcher gegenüber einem Kavitätsinnendurchmesser 16 derart geringer ist, dass zwischen einer Kragenteilaußenseite 30 und der Innenwandseite 11 des Pfannenteils 2 der Gaskonvektionsraum 32 formuliert ist.A gas convection chamber 32 which acts effectively in this regard is configured on the metallurgical melting vessel 1, since the collar part 26 has a collar part outer diameter 33 (see Figure 2 ), which is smaller compared to a cavity inner diameter 16 such that the gas convection space 32 is formulated between a collar part outer side 30 and the inner wall side 11 of the socket part 2.

Darüber hinaus ist durch den Gaskonvektionsraum 32 gewährleistet, dass sich insbesondere der obere Randbereich 7 des Pfannenteils 2 einerseits und auch das Kragenteil 26 andererseits besonders gleichmäßig erwärmen können, so dass ein Erstarren von metallischer Schmelze in einem kritischen Maße dort gut verhindert werden kann.In addition, the gas convection chamber 32 ensures that, in particular, the upper edge region 7 of the socket part 2 on the one hand and also the collar part 26 on the other hand can heat up particularly uniformly, so that solidification of the metallic melt can be prevented there to a critical extent.

Hierbei ist das Kragenteil 26 entlang seines Umfangs konstant um mehr als 200 mm, bevorzugt 275 mm, von der Innenwandseite 11 des Pfannenteils 2 beabstandet angeordnet. Ebenso kann aber wie eingangs bereits erwähnt bei einer exzentrischen Anordnung ein über den Umfang variabler Abstand, vorzugsweise von 200 - 400 mm, eingestellt werden.Here, the collar part 26 is arranged along its circumference at a constant distance of more than 200 mm, preferably 275 mm, from the inner wall side 11 of the socket part 2. However, as already mentioned at the beginning, a distance that is variable over the circumference, preferably from 200 to 400 mm, can be set for an eccentric arrangement.

Durch die gleichmäßige Erhitzung des Kragenteils 26 und des oberen Randbereichs 7 ist eine Bärenbildung sowohl außen als auch innen am Kragenteil 26 sowie zwischen der Innenseitenwand 11 und dem Kragenteil 26 unterbunden.The uniform heating of the collar part 26 and the upper edge region 7 prevents bear formation both on the outside and on the inside of the collar part 26 and between the inside wall 11 and the collar part 26.

Zentrisch durch das Deckelteil 3 hindurch kann noch ein Lanzenelement 34 zum Einblasen von Sauerstoff geführt, welches bis in das Kragenteil 26 hineinragt, wobei das Kragenteil 26 dieses Lanzenelement 34 konzentrisch umgibt.A lance element 34 for blowing oxygen can be guided centrally through the cover part 3, which protrudes into the collar part 26, the collar part 26 concentrically surrounding this lance element 34.

Es versteht sich, dass es sich bei dem vorstehend erläuterten Ausführungsbeispiel lediglich um eine erste Ausgestaltung des erfindungsgemäßen Deckelteils bzw. des diesbezüglichen metallurgischen Schmelzgefäßes handelt. Insofern beschränkt sich die Ausgestaltung der Erfindung nicht auf dieses erste Ausführungsbeispiel.It goes without saying that the exemplary embodiment explained above is merely a first embodiment of the cover part according to the invention or of the metallurgical melting vessel in this regard. In this respect, the embodiment of the invention is not limited to this first exemplary embodiment.

Sämtliche in den Anmeldungsunterlagen offenbarten Merkmale werden als erfindungswesentlich beansprucht, sofern sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.All features disclosed in the application documents are claimed as essential to the invention, provided that they are new compared to the prior art, individually or in combination.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
metallurgisches Schmelzgefäßmetallurgical melting vessel
22
Anlageinvestment
33
Deckelteilcover part
44
Kavitätcavity
55
Oberseitetop
66
Öffnungopening
77
oberer Randbereichupper margin
88th
Wandungwall
99
Pfannepan
1010
Tanktank
1111
InnenwandseiteInner wall side
1212
InnenwandseitenhöheInner wall surface height
1313
Innenseiteinside
1414
Bodenbereichfloor area
1515
Auflageflächebearing surface
1616
KavitätsinnendurchmesserKavitätsinnendurchmesser
2020
Unterseitebottom
2121
Pfannenteil-AnlageflächeSocket part-bearing surface
2525
SpritzschutzeinrichtungSplash guard
2626
Kragenteilcollar part
2727
zugewandte Seite des Deckelteilsfacing side of the cover part
2828
ÜbergangsbereichTransition area
2929
Mittelachsecentral axis
3030
KragenteilaußenseiteCollar part outside
3131
Zwischenraumgap
3232
GaskonvektionsraumGaskonvektionsraum
3333
KragenteilaußendurchmesserCollar part outer diameter
3434
Lanzenelementlance member

Claims (13)

  1. A cover part (3) of a metallurgical melting vessel (1) for covering an opening (6) of a cavity (4) of a ladle part (2) of the metallurgical melting vessel (1), wherein the cover part (3) comprises a collar part (26), which can protrude into the cavity (4) of the ladle part (2), in order to reduce the risk of formation of skull on the metallurgical melting vessel (1), characterized in that fastening elements serve for the arrangement of the collar part (26), wherein said fastening elements are arranged on the collar part (26) such that they protrude vertically downward from the cover part (3) and adjustable with respect to their length, preferably realized in the form of length-adjustable chains.
  2. The cover part (3) according to claim 1, characterized in that the collar part (26) is designed so as to protrude beyond a ladle part contact surface (21) formed on the underside (20) of the cover part (3) in such a way that the collar part (26) protrudes into the cavity of the ladle part when the cover part (3) is properly attached to the ladle part (2).
  3. The cover part (3) according to claim 2, characterized in that the collar part (26) protrudes beyond the underside (20) of the cover part (3) by more than 200 mm, preferably by more than 500 mm.
  4. The cover part (3) according to one of claims 1 to 3, characterized in that the collar part (26) is arranged on the cover part (3) in such a way that the distance between the upper side of the cover part (3) and the end of the collar part (26) facing away from the upper side is variable.
  5. A metallurgical melting vessel (1) with a ladle part (2), which has a cavity (4) for receiving the molten metal, and with a cover part (3) according to one of claims 1 to 4, characterized in that the metallurgical melting vessel (1) has a splash protection device (25), which extends into the cavity (4) and comprises a collar part (26), wherein said collar part is at least partially arranged radially inside adjacent to an inner side (11) of the wall (8) when the cover part (3) is properly attached to the ladle part (2).
  6. The metallurgical melting vessel (1) according to claim 5, characterized in that the collar part (26) is arranged eccentric to the cavity (4).
  7. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) protrudes into the cavity (4) of the ladle part (2) by more than 1/6 or by more than 1/4 of the inner side height (12) of a wall (8) of the ladle part (2).
  8. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) protrudes into the cavity (4) of the ladle part (2) by more than 200 mm, preferably by more than 500 mm.
  9. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) is spaced apart from an inner side (11) of a wall (8) of the ladle part (2) in such a way that an intermediate space (31) is formed between an outer side (30) of the collar part (26) and an inner side (11) of the wall (8) .
  10. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the outside diameter (33) of the collar part (26) is smaller than an inside diameter (16) of the cavity such that a gas convection space (32) is arranged between an outer side (30) of the collar part and an inner side (11) of a wall (8) of the ladle part (2).
  11. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) is spaced apart from an inner side (11) of a wall (8) of the ladle part (2) by more than 100 mm, preferably by more than 200 mm.
  12. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) is spaced apart from an inner side (11) of a wall (8) of the ladle part (2) by less than 400 mm, preferably by less than 300 mm.
  13. The cover part (3) or the metallurgical melting vessel (1) according to one of the preceding claims, characterized in that the collar part (26) is realized cylindrically and particularly arranged concentrically around the center axis (29) of the cover part (3) or the metallurgical melting vessel (1), respectively.
EP15771873.5A 2014-11-27 2015-09-17 Cover part of a metallurgical melting vessel Active EP3224560B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201531201T SI3224560T1 (en) 2014-11-27 2015-09-17 Cover part of a metallurgical melting vessel
PL15771873T PL3224560T3 (en) 2014-11-27 2015-09-17 Cover part of a metallurgical melting vessel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014017497.2A DE102014017497A1 (en) 2014-11-27 2014-11-27 Cover part of a metallurgical melting vessel and metallurgical melting vessel
PCT/EP2015/071273 WO2016082957A1 (en) 2014-11-27 2015-09-17 Cover part of a metallurgical melting vessel and metallurgical melting vessel

Publications (2)

Publication Number Publication Date
EP3224560A1 EP3224560A1 (en) 2017-10-04
EP3224560B1 true EP3224560B1 (en) 2020-02-26

Family

ID=54238391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15771873.5A Active EP3224560B1 (en) 2014-11-27 2015-09-17 Cover part of a metallurgical melting vessel

Country Status (6)

Country Link
EP (1) EP3224560B1 (en)
DE (1) DE102014017497A1 (en)
ES (1) ES2788400T3 (en)
PL (1) PL3224560T3 (en)
SI (1) SI3224560T1 (en)
WO (1) WO2016082957A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2091981A (en) * 1935-05-27 1937-09-07 Charles W Hanson Method of and apparatus for carrying out chemical reactions
JPS504603B2 (en) * 1971-08-26 1975-02-21
SE449373B (en) * 1977-07-01 1987-04-27 Dso Cherna Metalurgia SET AND DEVICE FOR REFINING IRON-BASED MELTORS IN ELECTRICAL REACTION OVEN
DE7928208U1 (en) * 1979-10-04 1980-01-03 Thyssen Ag Vorm. August Thyssen Huette, 4100 Duisburg DEVICE FOR CARRYING OUT METALLURGICAL REACTIONS IN A PAN
LU84481A1 (en) * 1982-11-19 1984-06-13 Wurth Paul Sa PROTECTIVE DEVICE FOR PAN LID
GB2351297B (en) * 1999-06-21 2004-01-21 Vacmetal Gmbh Metallurgical treatment apparatus
US6666902B1 (en) * 2000-05-12 2003-12-23 Nippon Steel Corporation Ladle refining apparatus and ladle refining method using it
DE102004019746A1 (en) * 2004-04-20 2005-12-01 Karl Konzelmann Metallschmelzwerke Gmbh & Co.Kg Containers for preventing or minimizing the burnup of aluminum and / or aluminum alloy dross
DE102007035622B4 (en) * 2007-07-30 2013-08-08 Siemens Aktiengesellschaft Lid for a furnace for receiving molten metal, in particular metal, and furnace for receiving molten material

Also Published As

Publication number Publication date
EP3224560A1 (en) 2017-10-04
WO2016082957A1 (en) 2016-06-02
PL3224560T3 (en) 2020-07-27
ES2788400T3 (en) 2020-10-21
DE102014017497A1 (en) 2016-06-02
SI3224560T1 (en) 2020-07-31

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