EP0193948A1 - Device and process for keeping molten metals warm - Google Patents
Device and process for keeping molten metals warm Download PDFInfo
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- EP0193948A1 EP0193948A1 EP86102919A EP86102919A EP0193948A1 EP 0193948 A1 EP0193948 A1 EP 0193948A1 EP 86102919 A EP86102919 A EP 86102919A EP 86102919 A EP86102919 A EP 86102919A EP 0193948 A1 EP0193948 A1 EP 0193948A1
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- Prior art keywords
- furnace chamber
- cover
- inlet
- outlet
- pressure
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- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
Definitions
- the invention relates to a device for storing and / or increasing or maintaining the temperature level of molten metals, in particular for keeping warm magnesium, in particular pure magnesium cast iron castings, with an inlet and an outlet furnace chamber which can be covered by a lid .
- This can be, for example, an oven device which has the basic design features of a known channel induction hot lime kiln.
- the invention relates to a method for keeping spherical and / or vermicular cast iron melts treated with magnesium, in particular pure magnesium, in a heatable furnace chamber which receives the cast iron melt and which can be covered by a cover.
- the generic device for storing and / or increasing or maintaining the temperature level of molten metals is characterized in that the lid of the furnace chamber is brought into contact with the latter in a pressure-tight manner and the furnace chamber has a feed for a medium under pressure.
- spheroidal cast iron melts treated with magnesium, in particular pure magnesium can also be kept at the desired casting temperature almost indefinitely. A drop in the magnesium content or the decay of the spheroidal iron melt is largely slowed down.
- the device according to the invention is advantageously designed so that almost all known warming devices such.
- B Induction channel furnaces can be converted accordingly with extremely little effort.
- the inlet and the outlet which according to a preferred development of the device according to the invention are formed by a common pouring and pouring siphon, can likewise be closed in a pressure-tight manner in a manner analogous to that of the furnace chamber.
- This will not be necessary in many applications of the device according to the invention, since only a slight, for example, magnesium erosion via the common one Pouring and pouring siphon takes place. In the applications where the highest quality requirements have to be set, this development of the invention represents an optimization measure to be recommended.
- the pressure-tight sealability of the furnace chamber cover or the closure cover can be achieved by means of a sealing strip.
- the cover of the furnace chamber can have this sealing strip on its sealing surfaces which bear against the furnace chamber or the sealing cover on its sealing surfaces against the walls of the common pouring and pouring siphon, which engages in sealing joints provided on the boundary walls of the furnace chamber or on the siphon walls.
- the sealing strip preferably has a T-shaped cross-sectional profile.
- the device according to the invention is preferably designed as a tiltable electric induction furnace, the inductor on lower furnace section, as far as possible vertically below the furnace chamber; is arranged.
- This lower vertical arrangement is particularly advantageous for reducing undesirable slag suspension approaches.
- an inert gas under pressure is preferably used, nitrogen or argon having proven particularly useful.
- the inert gas is supplied to the inside of the furnace with an overpressure of 1 to 6 bar.
- the pressure in the furnace chamber is regulated in the case of nodular cast iron melts treated with pure magnesium in such a way that the breakdown of the magnesium in the melt is almost zero.
- the device according to the invention for keeping a spheroidal cast iron melt treated with pure magnesium is generally designated 1.
- This device has an oven chamber 3, which is provided with an inlet and an outlet, which is designed as a common pouring and pouring siphon 2.
- the device 1 is arranged on foundations 23 and a furnace support 24 and can be pivoted about a pivot point 20 by means of a pivot cylinder 19.
- the Swivel cylinder 19 is articulated to a lower support bearing 25 and an upper support bearing 26.
- the furnace chamber 3 can be closed in a pressure-tight manner at the top by a cover 4.
- the sealing surfaces 4b on the front area of the furnace chamber 3 has a T-shaped sealing strip 7 which engages in a sealing joint 8.
- the frontal areas of the furnace chamber 3 and the cover 4 and the structural design of the sealing strips 7 and the sealing joints 8 is chosen so that after the furnace chamber 3 is closed by the cover 4 by means of a refractory mass (e.g. corundum), it is additionally covered can be used to increase the tightness of the furnace chamber.
- the lid 4 is clamped with the oven chamber 3 in a pressure-tight manner via a closing device 11 by means of a wedged tie rod 10.
- the structural design of the seal of the pivotable closure cap 6 of the common pouring and pouring siphon 2 can be designed completely analogously to the pressure-tight seal of the furnace chamber 3. However, for reasons of simplification, this has been omitted in the drawing.
- Both the furnace chamber 3 and the common pouring and pouring siphon 2, like the cover 4 and the closure cover 6, are lined on the inside with a refractory mass 12: this refractory mass is on the upper regions of the furnace chamber 3 and on the lower regions of the cover 4 designed in such a way that the sealing surfaces of the cover 4 are completely shielded from the furnace interior 13.
- the supply opening 5 for supplying the pressurized medium, for. B. argon, and on the other hand, the pressure relief valve 22 of the furnace chamber 3 is arranged on the lid 4 of the furnace chamber 3.
- the electrical connections between the are not shown in detail Inert gas supply 5, the closing device 11 and the pressure relief valve 15 for the already described control or circuitry connection of these elements.
- the inductor 16 for heating the furnace chamber 3 is almost perpendicularly below the furnace chamber.
- the inductor 16 has an energy supply 27 and is surrounded by a cooling flange 18 on the furnace chamber side. It is also essential in the context of the invention that the inductor 16 has a special induction channel 28 which is connected to the furnace interior 13.
- the inductor 16 is to be designed in such a way that it can easily be flanged to the furnace chamber or fastened in a suitable manner.
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Bevorratung und/oder Erhöhung bzw. Erhaltung des Temperaturniveaus von schmelzflüssigen Metallen, insbesondere zum Warmhalten von mit Magnesium, insbesondere Reinmagnesium behandelten Sphärogußeisenschmelzen, mit einer einen Einlaß und einen Auslaß aufweisenden Ofenkammer, die von einem Deckel abdeckbar ist. Hierbei kann es sich beispielsweise um eine Ofenvorrichtung handeln, die die grundlegenden Konstruktionsmerkmale eines bekannten Rinneninduktionswarmkalkofens aufweist.The invention relates to a device for storing and / or increasing or maintaining the temperature level of molten metals, in particular for keeping warm magnesium, in particular pure magnesium cast iron castings, with an inlet and an outlet furnace chamber which can be covered by a lid . This can be, for example, an oven device which has the basic design features of a known channel induction hot lime kiln.
Daneben betrifft die Erfindung ein Verfahren zum Warmhalten von mit Magnesium, insbesondere Reinmagnesium behandelten Sphäro- und/oder Vermikulargußeisenschmelzen in einer die Gußeisenschmelze aufnehmenden beheizbaren Ofenkammer, die mittels eines Deckels abdeckbar ist..In addition, the invention relates to a method for keeping spherical and / or vermicular cast iron melts treated with magnesium, in particular pure magnesium, in a heatable furnace chamber which receives the cast iron melt and which can be covered by a cover.
In Gießereibetrieben und in der Metallurgie im allgemeinen besteht oftmals das Bedürfnis, größere Mengen an schmelzflüssigem Metall zu erwärmen oder bereits erschmolzene Metallmengen über längere Zeitspannen warmzuhalten, da diese nach Ihrer Erschmelzung nicht sofort dem weiteren Verarbeitungsprozeß zugeführt werden. Zur Erwärmung oder zum Warmhalten von Gußeisenschmelzen stehen verschiedene Ausführungsvarianten von bekannten Schmelz- bzw. Warmhalteöfen zur Verfügung. Beispielhaft seien hier Induktionsrinnenöfen oder Induktionstiegelöfen genannt.In foundries and in metallurgy in general, there is often a need to heat large quantities of molten metal or to keep metal quantities that have already been melted warm over long periods of time, since these do not immediately pass to the further processing process after they have melted. Various versions of known melting and holding furnaces are available for heating or keeping cast iron melts warm. Examples include induction channel furnaces or induction crucible furnaces.
Zum Warmhalten von flüssigen Metallschmelzen, die zuvor mit besonderen Zusätzen behandelt worden sind, können diese handelsüblichen Schmelz- bzw. Warmhalteöfen allerdings nicht Einsatz finden. Dies ist insbesondere daruaf zurückzuführen, daß die zugesetzten Stoffe während des Warmhaltens aus der Schmelze entweichen, was ein sogenanntes Abklingen der Schmelze zur Folge hat. Beispielhaft sei hier das Gußeisen mit Kugelgraphit genannt, das heutzutage in zunehmendem Maße mit Magnesium, insbesondere Reinmagnesium als Zusatz hergestellt wird. Das Reinmagnesiumbehandlungsverfahren zur Herstellung von Sphärogußeisenschmelzen gewinnt immer größere Bedeutung, nachdem es durch das Tauchbirneverfahren (DE-PS 22 08 960) gelungen ist, das Reinmagnesium der Ausgangseisenschmelze treffsicher und äußerst kostengünstig zuzusetzen. Hierbei besteht jedoch nach dem bisherigen Stand der Technik das zwingende Erfordernis, nach einer Magnesiumbehandlung die flüssige Metallschmelze sofort abzugießen, um den obengenannten Abklingeffekt zu verhindern. Dies widerspricht jedoch vielfach den Grundsätzen eines ökonomischen Verfahrenslaufes in Gießereibetrieben, da es äußerst wünschenswert wäre, nach einer einmal durchgeführten Tauchbehandlung die Metallschmelze über längere Zeiträume bevorraten bzw. warmhalten zu können, um behandelte Metallschmelzen mit gleichen Eigenschaften im jeweiligen Bedarfsfalle zur Verfügung zu haben.However, these commercially available melting or holding furnaces cannot be used to keep molten metal melts that have previously been treated with special additives warm. This is due in particular to the fact that the added substances escape from the melt while keeping warm, which results in a so-called decay of the melt. An example is the spheroidal graphite cast iron, which is nowadays increasingly being manufactured with magnesium, in particular pure magnesium, as an additive. The pure magnesium treatment process for the production of spheroidal cast iron melts is gaining in importance after the immersion bulb process (DE-PS 22 08 960) has succeeded in adding the pure magnesium to the starting iron melt accurately and extremely inexpensively. However, according to the prior art, there is an imperative to immediately pour off the molten metal after a magnesium treatment in order to prevent the above-mentioned decay effect. However, this often contradicts the principles of an economic process run in foundries, since it would be extremely desirable to be able to store or keep the molten metal warm for a longer period of time after a dip treatment, in order to have treated molten metals with the same properties available in the respective case.
Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren der eingangs genannten Art dahingehend zu verbessern, daß mit möglichst einfachen Mitteln flüssige Metallschmelzen auch dann bevorratet und warmgehalten werden können, wenn diese zuvor mit besonderen Zusätzen behandelt worden sind, wie beispielsweise eine mit Reinmagnesium behandelte Sphärogußeisenschmelze.It is therefore an object of the present invention to improve a device and a method of the type mentioned in such a way that liquid metal melts can be stored and kept warm with the simplest possible means even if they have been treated beforehand with special additives, such as one with Pure magnesium treated nodular cast iron melt.
Zur Lösung dieser Aufgabe ist die gattungsgemäße Vorrichtung zur Bevorratung und/oder Erhöhung bzw. Erhaltung des Temperaturniveaus von schmelzflüssgen Metallen dadurch gekennzeichnet, daß der Deckel der Ofenkammer druckdicht an dieser in Anlage gebracht ist und die Ofenkammer eine Zufuhr für ein unter Druck stehenden Medium aufweist. Mit einer solchen erfindungsgemäßen Vorrichtung können auch mit Magnesium, insbesondere Reinmagnesium behandelte Sphärogußeisenschmelzen auf der gewünschten Vergießtemperatur nahezu unbegrenzt warmgehalten werden. Ein Abfall des Magnesiumgehaltes bzw. Abklingen der Sphärogußeisenschmelze ist weitgehend gebremst. Damit ist die Voraussetzung geschaffen, auch größere Mengen der Ausgangseisenschmelze mit den jeweiligen Zusätzen in einem Arbeitsprozeß und somit kostenoptimiert zu behandeln, danach in der erfindungsgemäßen Vorrichtung warmzuhalten und die für den jeweiligen Bedarfsfall erforderliche Menge der Vorrichtung bzw. dem Warmhalteofen zum Abgießen zu entnehmen. Die Vorrichtung nach der Erfindung ist dabei in vorteilhafter Weise so konzipiert, daß nahezu alle bekannten Warmhaltevorrichtungen wie z. B: Induktionsrinnenöfen mit einem äußerst geringen Aufwand entsprechend umgerüstet werden können.To solve this problem, the generic device for storing and / or increasing or maintaining the temperature level of molten metals is characterized in that the lid of the furnace chamber is brought into contact with the latter in a pressure-tight manner and the furnace chamber has a feed for a medium under pressure. With such a device according to the invention, spheroidal cast iron melts treated with magnesium, in particular pure magnesium, can also be kept at the desired casting temperature almost indefinitely. A drop in the magnesium content or the decay of the spheroidal iron melt is largely slowed down. This creates the prerequisite for treating even larger amounts of the starting iron melt with the respective additives in one work process and thus in a cost-optimized manner, then keeping them warm in the device according to the invention and removing the amount of the device or the holding furnace required for the respective pouring. The device according to the invention is advantageously designed so that almost all known warming devices such. B: Induction channel furnaces can be converted accordingly with extremely little effort.
Der Einlaß und der Auslaß, die nach einer bevorzugten Weiterbildung der erfindungsgemäßen Vorrichtung durch ein gemeinsames Ein- und Ausgußsiphon gebildet werden, können dabei ebenfalls in analoger Weise wie die Ofenkammer über einen Verschlußdeckel druckdicht verschlossen werden. Dies wird zwar in vielen Anwendungsfällen der erfindungsgemäßen Vorrichtung nicht notwendig sein, da nur ein geringfügiger beispielsweise Magnesiumabbrand über das gemeinsame Ein- und Ausgußsiphon erfolgt. In den Anwendungsfällen, wo allerhöchste Qualitätsanforderungen zu stellen sind, stellt diese Weiterbildung der Erfindung eine zu empfehlende Optimierungsmaßnahme dar.The inlet and the outlet, which according to a preferred development of the device according to the invention are formed by a common pouring and pouring siphon, can likewise be closed in a pressure-tight manner in a manner analogous to that of the furnace chamber. This will not be necessary in many applications of the device according to the invention, since only a slight, for example, magnesium erosion via the common one Pouring and pouring siphon takes place. In the applications where the highest quality requirements have to be set, this development of the invention represents an optimization measure to be recommended.
Die druckdichte Verschließbarkeit des Ofenkammerdeckels bzw. des Verschlußdeckels kann mittels einer Dichtleiste erfolgen. Hierbei kann der Deckel der Ofenkammer an seinen an der Ofenkammer anliegenden bzw. der Verschlußdeckel an seinen an den Wandungen des gemeinsamen Ein- und Ausgußsiphons anliegenden Dichtflächen diese Dichtleiste aufweisen, die in an den Begrenzungswänden der Ofenkammer bzw. an den Siphonwandungen vorgesehene Dichtfugen eingreift. Die Dichtleiste hat bevorzugt ein T-förmig gestaltetes Querschnittsprofil.The pressure-tight sealability of the furnace chamber cover or the closure cover can be achieved by means of a sealing strip. In this case, the cover of the furnace chamber can have this sealing strip on its sealing surfaces which bear against the furnace chamber or the sealing cover on its sealing surfaces against the walls of the common pouring and pouring siphon, which engages in sealing joints provided on the boundary walls of the furnace chamber or on the siphon walls. The sealing strip preferably has a T-shaped cross-sectional profile.
Weitere vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind in den Ansprüchen 5 bis 21 angegeben. Besonders hingewiesen sei allerdings darauf, daß das Überdruckventil der Ofenkammer (Anspruch 13 bis 15) über bekannte elektrische Steuersysteme, den Deckel solange blockiert, bis der Druck in der Ofenkammer auf Normalatmosphärendruck entspannt ist. Umgekehrt wird auch das unter Druck stehendes Medium über die Zufuhröffnung der Ofenkammer erst dann zugeführt, - was wiederum über bekannte elektrische Steuersysteme bewerkstelligt werden kann - bis eine sichere druckfeste Abdichtung der Ofenkammer gewährleistet ist. Je nach Anwendungsfall ist es selbstverständlich auch möglich, ein zweites Uberdruckventil vorzusehen.Further advantageous embodiments of the device according to the invention are specified in claims 5 to 21. However, it should be particularly pointed out that the pressure relief valve of the furnace chamber (claims 13 to 15) blocks the cover via known electrical control systems until the pressure in the furnace chamber is released to normal atmospheric pressure. Conversely, the medium under pressure is only then supplied via the feed opening of the furnace chamber, which in turn can be accomplished via known electrical control systems, until a secure pressure-tight seal of the furnace chamber is ensured. Depending on the application, it is of course also possible to provide a second pressure relief valve.
Es sei ebenfalls noch darauf hingewiesen, daß die erfindungsgemäße Vorrichtung bevorzugt als kippbarer elektrischer Induktionsofen ausgeführt ist, wobei der Induktor am unteren Ofenkammerabschnitt, und zwar soweit wie möglich senkrecht unter der Ofenkammer; angeordnet ist. Diese untere senkrechte Anordnung ist insbesondere zur Verminderung unerwünschter Schlackensuspensionsansätze von Vorteil.It should also be pointed out that the device according to the invention is preferably designed as a tiltable electric induction furnace, the inductor on lower furnace section, as far as possible vertically below the furnace chamber; is arranged. This lower vertical arrangement is particularly advantageous for reducing undesirable slag suspension approaches.
Hier bei wird bevorzugt ein unter Druck stehendes Inertgas eingesetzt, wobei sich Stickstoff oder Argon besonders bewährt haben. Je nach den Ausgangswerten (z. B. Magnesiumgehalt) der warmzuhaltenden Metallschmelze wird das Inertgas mit einem Überdruck von 1 bis 6 bar dem Ofeninneren zugeführt. Die Druckbeaufschlagung der Ofenkammer wird dabei bei mit Reinmagnesium behandelten Sphärogußeisenschmelzen so einreguliert, daß der Abbau des Magnesiums der Schmelze annähernd gegen null geht.In this case, an inert gas under pressure is preferably used, nitrogen or argon having proven particularly useful. Depending on the initial values (e.g. magnesium content) of the molten metal to be kept warm, the inert gas is supplied to the inside of the furnace with an overpressure of 1 to 6 bar. The pressure in the furnace chamber is regulated in the case of nodular cast iron melts treated with pure magnesium in such a way that the breakdown of the magnesium in the melt is almost zero.
Aufbau und Funktionseigenschaften der Erfindung, ihre Vorteile und Wirkungsweise werden nun anhand der schematischen Zeichnung eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung näher beschrieben. In der Zeichnung sind nur die zum unmittelbaren Verständnis der Erfindung notwendigen Elemente der erfindungsgemäßen Warmhaltevorrichtung dargestellt. Die Figur zeigt eine schematische Schnittdarstellung der erfindungsgemäßen Vorrichtung.The structure and functional properties of the invention, its advantages and mode of operation will now be described in more detail with reference to the schematic drawing of an embodiment of the device according to the invention. In the drawing, only the elements of the warming device according to the invention necessary for a direct understanding of the invention are shown. The figure shows a schematic sectional view of the device according to the invention.
Allgemein mit 1 ist die erfindungsgemäße Vorrichtung zum Warmhalten einer mit Reinmagnesium behandelten Spärogußeisenschmelze bezeichnet. Diese Vorrichtung weist eine Ofenkammer 3 auf, die mit einem Einlaß und einem Auslaß versehen ist, die als gemeinsames Ein- und Ausgußsiphon 2 ausgebildet ist. Es ist allerdings ebenfalls möglich, z. B. am unteren Bereich der Ofenkammer 3 einen besonderen Auslaß vorzusehen. Die Vorrichtung 1 ist auf Fundamenten 23 und einer Ofenstütze 24 angeordnet und mittels eines Schwenkzylinders 19 um einen Drehpunkt 20 schwenkbar. Der Schwenkzylinder 19 ist an einem unteren Stützlager 25 und einem oberen Stützlager 26 angelenkt. Die Ofenkammer 3 ist oben durch einen Deckel 4 druckdicht verschließbar. Die Dichtflächen 4b an dem stirnseitigen Bereich der Ofenkammer 3 weist eine T-förmig gestaltete Dichtleiste 7 auf, die in eine Dichtfuge 8 eingreift. Die stirnseitigen Bereiche der Ofenkammer 3 und des Deckels 4 sowie die konstruktive Auslegung der Dichtleisten 7 und der Dichtfugen 8 ist dabei so gewählt, daß nach Verschließen der Ofenkammer 3 durch den Deckel 4 mittels einer feuerfesten Masse (z. B. Korund) noch zusätzlich bedeckt werden kann, um die Dichtigkeit der Ofenkammer zu erhöhen. Der Deckel 4 wird mit der Ofnnkammer 3 über eine Verschließeinrichtung 11 mittels verkeilter Zuganker 10 druckdicht verspannt. Die konstruktive Gestaltung der Abdichtung des schwenkbaren Verschlußdeckels 6 des gemeinsamen Ein- und Ausgußsiphons 2 kann vollkommen analog gestaltet sein wie die druckfeste Abdichtung der Ofenkammer 3. Aus Vereinfachungsgründen ist hierauf jedoch in der zeichnerichen Darstellung verzichtet worden.The device according to the invention for keeping a spheroidal cast iron melt treated with pure magnesium is generally designated 1. This device has an oven chamber 3, which is provided with an inlet and an outlet, which is designed as a common pouring and pouring siphon 2. However, it is also possible, e.g. B. at the bottom of the furnace chamber 3 to provide a special outlet. The device 1 is arranged on
Sowohl die Ofenkammer 3 als auch das gemeinsame Ein- und Ausgußsiphon 2 sind ebenso wie der Deckel 4 und der Verschlußdeckel 6 innenseitig mit einer feuerfesten Masse 12 ausgekleidet: Diese feuerfeste Masse ist an den oberen Bereichen der Ofenkammer 3 und an den unteren Bereichen des Deckels 4 derart gestaltet, daß die Dichtflächen des Deckels 4 vollständig zum Ofeninneren 13 hin abgeschirmt sind.Both the furnace chamber 3 and the common pouring and pouring siphon 2, like the cover 4 and the closure cover 6, are lined on the inside with a refractory mass 12: this refractory mass is on the upper regions of the furnace chamber 3 and on the lower regions of the cover 4 designed in such a way that the sealing surfaces of the cover 4 are completely shielded from the furnace interior 13.
An dem Deckel 4 der Ofenkammer 3 ist zum einen die Zufuhröffnung 5 zur Zuführung des unter Druck stehenden Mediums, z. B. Argon, und zum anderen das Überdruckventil 22 der Ofenkammer 3 angeordnet. Im einzelnen nicht näher dargestellt sind die elektrischen Verbindungen zwischen der Inertgaszuführung 5, der Verschließeinrichtung 11 sowie des Überdruckventils 15 zur bereits beschriebenen steuer- bzw. schaltungstechnischen Verknüpfung dieser Elemente. Nahezu senkrecht unter der Ofenkammer ist der Induktor 16 zur Beheizung der Ofenkammer 3. Der Induktor 16 weist eine Energieversorgung 27 auf und ist ofenkammerseitig von einem Kühlflansch 18 umgeben. Wesentlich im Rahmen der Erfindung ist hierbei auch, daß der Induktor 16 über einen besonderen mit dem Ofeninneren 13 in Verbindung stehenden Induktionskanal 28 verfügt. Dies wirkt sich neben der erfindungsgemäßen Anordnung des Induktors 16 positiv auf die beschriebene Ausscheidung von Schlackensuspensionen aus. Der Induktor 16 ist so zu gestalten, daß er auf einfache Weise an der Ofenkammer angeflanscht oder anders geeignet befestigt werden kann.On the lid 4 of the furnace chamber 3, the supply opening 5 for supplying the pressurized medium, for. B. argon, and on the other hand, the
Claims (26)
dadurch gekennzeichnet, daß der Deckel (4) mit der Ofenkammer (3) druckdicht in Anlage bringbar ist und die Ofenkammer (3) eine Zufuhr (5) für ein unter Druck stehendes Medium aufweist.1. Apparatus (1) for storing and / or increasing or maintaining the temperature level of molten metals, in particular for keeping spheroidal cast iron melts treated with magnesium, in particular pure magnesium, with a heatable furnace chamber having an inlet (2) and an outlet (2) ( 3), which can be covered by a cover (4),
characterized in that the cover (4) can be brought into pressure-tight contact with the furnace chamber (3) and the furnace chamber (3) has a feed (5) for a medium under pressure.
dadurch gekennzeichnet, daß nach Einfüllen der Gußeisenschmelze in die auf Warmhaltetemperatur erwärmten und/oder erwärmbaren Ofenkammer (3) der Deckel (4) mit der Ofenkammer (3) druckdicht verschlossen und das Ofeninnere (13) mit einem unter Druck stehenden Medium beaufschlagt wird.22. Process for keeping spheroidal and / or vermicular cast iron melts treated with magnesium, in particular pure magnesium, in a heatable furnace chamber which receives the cast iron melt and can be covered by means of a cover (4),
characterized in that after pouring the cast iron melt into the heated and / or heatable furnace chamber (3) the lid (4) with the furnace chamber (3) is closed in a pressure-tight manner and the interior of the furnace (13) is pressurized with a medium under pressure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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AT86102919T ATE50601T1 (en) | 1985-03-05 | 1986-03-05 | DEVICE AND METHOD FOR KEEPING LIQUID METAL WARM. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE3507648 | 1985-03-05 | ||
DE19853507648 DE3507648A1 (en) | 1985-03-05 | 1985-03-05 | DEVICE AND METHOD FOR KEEPING LIQUID METAL MELS WARM |
Publications (2)
Publication Number | Publication Date |
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EP0193948A1 true EP0193948A1 (en) | 1986-09-10 |
EP0193948B1 EP0193948B1 (en) | 1990-02-28 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP86102919A Expired - Lifetime EP0193948B1 (en) | 1985-03-05 | 1986-03-05 | Device and process for keeping molten metals warm |
Country Status (10)
Country | Link |
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US (2) | US4638980A (en) |
EP (1) | EP0193948B1 (en) |
JP (1) | JPS61252484A (en) |
CN (1) | CN1012839B (en) |
AT (1) | ATE50601T1 (en) |
CA (1) | CA1243843A (en) |
DE (2) | DE3507648A1 (en) |
ES (1) | ES8708259A1 (en) |
SU (1) | SU1494855A3 (en) |
YU (1) | YU45772B (en) |
Families Citing this family (19)
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US5271539A (en) * | 1986-06-09 | 1993-12-21 | Kawasaki Steel Corporation | Pressure type automatic pouring furnace for casting |
DE3724200A1 (en) * | 1987-07-22 | 1989-02-02 | Kloeckner Humboldt Deutz Ag | Process for the low-level desulphurisation of base iron for the production of steel and cast iron |
JPH01245120A (en) * | 1988-02-09 | 1989-09-29 | Westofen Gmbh | Method and apparatus for measuring fluid medium |
IT1233232B (en) * | 1989-07-25 | 1992-03-20 | Weber Srl | CONTINUOUS SEMIQUID CASTING PROCEDURE AND OVEN FOR ITS REALIZATION |
JP2841759B2 (en) * | 1990-07-04 | 1998-12-24 | 富士電機株式会社 | Vacuum induction furnace |
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GB765423A (en) * | 1954-03-06 | 1957-01-09 | Mond Nickel Co Ltd | Improvements in methods of and apparatus for the treatment of molten iron and steel |
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-
1986
- 1986-02-26 SU SU864027011A patent/SU1494855A3/en active
- 1986-03-04 US US06/836,095 patent/US4638980A/en not_active Expired - Fee Related
- 1986-03-04 ES ES552615A patent/ES8708259A1/en not_active Expired
- 1986-03-04 CA CA000503254A patent/CA1243843A/en not_active Expired
- 1986-03-05 AT AT86102919T patent/ATE50601T1/en not_active IP Right Cessation
- 1986-03-05 DE DE8686102919T patent/DE3669177D1/en not_active Revoked
- 1986-03-05 JP JP61048173A patent/JPS61252484A/en active Pending
- 1986-03-05 YU YU32786A patent/YU45772B/en unknown
- 1986-03-05 CN CN86101396A patent/CN1012839B/en not_active Expired
- 1986-03-05 EP EP86102919A patent/EP0193948B1/en not_active Expired - Lifetime
- 1986-10-06 US US06/915,779 patent/US4690385A/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
CN86101396A (en) | 1986-11-19 |
YU45772B (en) | 1992-07-20 |
JPS61252484A (en) | 1986-11-10 |
SU1494855A3 (en) | 1989-07-15 |
CA1243843A (en) | 1988-11-01 |
US4638980A (en) | 1987-01-27 |
ES552615A0 (en) | 1987-10-01 |
US4690385A (en) | 1987-09-01 |
YU32786A (en) | 1988-10-31 |
DE3669177D1 (en) | 1990-04-05 |
ES8708259A1 (en) | 1987-10-01 |
ATE50601T1 (en) | 1990-03-15 |
CN1012839B (en) | 1991-06-12 |
EP0193948B1 (en) | 1990-02-28 |
DE3507648A1 (en) | 1986-09-11 |
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