EP0049239A1 - Continuous-casting device - Google Patents
Continuous-casting device Download PDFInfo
- Publication number
- EP0049239A1 EP0049239A1 EP81890156A EP81890156A EP0049239A1 EP 0049239 A1 EP0049239 A1 EP 0049239A1 EP 81890156 A EP81890156 A EP 81890156A EP 81890156 A EP81890156 A EP 81890156A EP 0049239 A1 EP0049239 A1 EP 0049239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- nozzle block
- melt container
- seal
- channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/143—Plants for continuous casting for horizontal casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
- B22D11/047—Means for joining tundish to mould
Definitions
- the continuous casting devices for high-melting alloys differ significantly from those for metals with a low melting point. Due to the higher thermal stress, different materials, e.g. the usual refractory linings, steel fittings, etc., are no longer used. Other materials with a higher thermal resistance have to be used, these mostly having a lower mechanical strength, so that other constructive solutions have to be sought.
- an essential factor is that the best possible thermal insulation is achieved between the mostly water-cooled mold and the melt container. For this purpose, asbestos is arranged between the mold and the melt container, for example.
- a casting device with a horizontal sliding mold in which a slide is provided.
- the slide consists of three plates of a ceramic material, e.g. Aluminum oxide, zirconium oxide or a nitrogen-containing boron compound, which are each arranged in a metal frame. The plates are pressed against each other.
- the middle plate is designed to be movable and has a cylindrical opening which is aligned with those of the other plates in the open state.
- the outer plate has a cone which cooperates with that of the nozzle stone.
- the mold and thus the nozzle block are pressed against the outer plate, whereby the nozzle block is to be sealed in the conical bore.
- conical sealing surfaces have the disadvantage that they have to match completely, since otherwise the nozzle stone or the outer plate is destroyed before a seal is achieved.
- melt container For the direct attachment of molds to a melt container, it is known to provide the melt container on the outside with a finely divided porous mass which is applied in the form of a suspension and then has to be dried. This drying process takes a few hours. The mold is then screwed to the melt container.
- the object of the invention is to provide a quickly releasable connection of a melt container and a continuous casting mold, which does not have the disadvantages of the above-mentioned devices.
- the continuous casting device for refractory metals and their alloys, e.g. Steel, with a melt container which has at least one channel which is connected to the cavity of a substantially horizontally arranged mold via at least one ceramic nozzle block, a seal being arranged between the nozzle block and the melt container, consists in the seal being made of a nonwoven Aluminum oxide fibers exist, and that the nozzle block penetrates the seal and extends into the channel, the sealing surfaces being essentially flat.
- Such an arrangement prevents direct contact between the molten metal and the fleece, so that no dissolution of the fleece and thus contamination of the molten metal is caused. Due to the flat sealing surfaces, essentially only compressive forces act on the ceramic components.
- the fiber fleece on the one hand compensates for unevenness and on the other hand it acts as a seal for the molten metal that can still penetrate between the nozzle stone and the inner surface of the channel.
- a one-piece nozzle block is provided which extends into the mold and into the channel of the melt container.
- the seal 3 provided according to the invention is arranged in a ring on the basis of A1203 fibers.
- the thickness of the seal is approx. 3 mm, if it has not yet been pressed between the channel and the nozzle block, but becomes approx. 1.5 mm thick when pressurized.
- the section 5 of the nozzle block has an opening which is cylindrical towards the distributor and towards the mold has a conically widening opening.
- the outer surface of the ingot mold is also slightly inclined in the form of a cylindrical jacket, so that the stone 5 "sticks" along a circular sealing line in the end region of the continuous casting mold 6 which is adjacent to it and is cooled by a cooling liquid 7.
- the circular ridge 5a of the mold block is advantageously replaced by an annular plane 5b, as a result of which the erosion is significantly reduced.
- the nozzle block consists of zirconium oxide, at least the surface 5c of the flow opening being formed from fine-grained zirconium oxide.
- the one-piece design of the zirconium oxide nozzle stone avoids all problems arising as a result of different coefficients of expansion of the two parts of the stone, and in particular the erosion of the gap between the parts.
- the mold 6, the possibly one-piece nozzle block 4, 5 and the distributor 1 can, for example, be firmly connected to one another by bolts and screws (not shown), the pressing pressure occurring when the screw connection being tightened being sufficient to provide a seal with A1203 fibers based on the seal according to the invention to achieve secure sealing of the sealing surfaces provided with it.
- the mold 6 can also be mounted on a movable slide and pressed by spring force against the nozzle block and this against the distributor, as a result of which the seal based on Ai203 based on at least one sealing surface is held in position and performs its sealing function there.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Der horizontale Strangguß ist insbesondere für hochwertige Stahlqualitäten geeignet. Die Verbindung zwischen Schmelzenbehälter (1) und Kokille (6) kann die Ursache von Störungen und Verunreinigung der Legierung sein. Diese Störungen können dadurch vermieden werden, daß zwischen dem Düsenstein (4) der Kokille und dem Schmelzenbehälter eine Dichtung aus einem Vlies aus Aluminiumoxidfasern angeordet ist.The horizontal continuous casting is particularly suitable for high-quality steel grades. The connection between the melt container (1) and the mold (6) can be the cause of faults and contamination of the alloy. These disturbances can be avoided in that a seal made of a fleece made of aluminum oxide fibers is arranged between the nozzle block (4) of the mold and the melt container.
Description
Die Stranggußvorrichtungen für hochschmelzende Legierungen unterscheiden sich wesentlich von jenen für Metalle mit niedrigem Schmelzpunkt. Auf Grund der höheren thermischen Beanspruchung können verschiedene Materialien, z.B. die üblichen feuerfesten Auskleidungen, Stahlarmaturen u.dgl., nicht mehr verwendet werden. Es müssen andere Materialien mit einer höheren thermischen Widerstandsfähigkeit eingesetzt werden, wobei diese meist eine geringere mechanische Festigkeit aufweisen, sodaß andere konstruktive Lösungen gesucht werden müssen. Bei den Stranggußvorrichtungen für niedrigschmelzende Metalle ist ein wesentlicher Faktor, daß eine möglichst gute thermische Isolierung zwischen der meist wassergekühlten Kokille und dem Schmelzenbehälter erreicht wird. Zu diesem Zweck ist beispielsweise zwischen Kokille und Schmelzenbehälter Asbest angeordnet.The continuous casting devices for high-melting alloys differ significantly from those for metals with a low melting point. Due to the higher thermal stress, different materials, e.g. the usual refractory linings, steel fittings, etc., are no longer used. Other materials with a higher thermal resistance have to be used, these mostly having a lower mechanical strength, so that other constructive solutions have to be sought. In the continuous casting devices for low-melting metals, an essential factor is that the best possible thermal insulation is achieved between the mostly water-cooled mold and the melt container. For this purpose, asbestos is arranged between the mold and the melt container, for example.
Aus der DOS 23 55 015 wird eine Gießvorrichtung mit horizontaler Gleitkokille bekannt, bei welcher ein Schieber vorgesehen ist. Der Schieber besteht aus drei Platten eines keramischen Materials, z.B. Aluminiumoxid, Zirkonoxid oder eine stickstoffhaltige Borverbindung, welche jeweils in einem Metallrahmen angeordnet sind. Die Platten werden gegeneinander gepreßt. Die mittlere Platte ist beweglich ausgebildet und weist eine zylindrische Öffnung auf, die im geöffneten Zustand mit jenen der anderen Platten fluchtet. Die äußere Platte weist einen Konus auf, welcher mit demjenigen des Düsensteines kooperiert. Die Kokille und damit der Düsenstein werden gegen die äußere Platte gedrückt, wodurch eine Abdichtung des Düsensteines in der konischen Bohrung erreicht werden soll. Derartige konische Dichtflächen weisen jedoch den Nachteil auf, daß sie vollständig übereinstimmen müssen, da sonst eine Zerstörung des Düsensteines oder der äußeren Platte erfolgt, bevor eine Abdichtung erreicht ist.From DOS 23 55 015 a casting device with a horizontal sliding mold is known, in which a slide is provided. The slide consists of three plates of a ceramic material, e.g. Aluminum oxide, zirconium oxide or a nitrogen-containing boron compound, which are each arranged in a metal frame. The plates are pressed against each other. The middle plate is designed to be movable and has a cylindrical opening which is aligned with those of the other plates in the open state. The outer plate has a cone which cooperates with that of the nozzle stone. The mold and thus the nozzle block are pressed against the outer plate, whereby the nozzle block is to be sealed in the conical bore. However, such conical sealing surfaces have the disadvantage that they have to match completely, since otherwise the nozzle stone or the outer plate is destroyed before a seal is achieved.
Zur direkten Befestigung von Kokillen an einen Schmelzenbehälter ist es bekannt, den Schmelzenbehälter an seiner Außenseite mit einer feinteiligen porösen Masse zu versehen, die in Form einer Suspension aufgebracht wird und sodann getrocknet werden muß. Dieser Trocknungsvorgang dauert einige Stunden. Die Kokille wird sodann mit dem Schmelzenbehälter verschraubt.For the direct attachment of molds to a melt container, it is known to provide the melt container on the outside with a finely divided porous mass which is applied in the form of a suspension and then has to be dried. This drying process takes a few hours. The mold is then screwed to the melt container.
Die Aufgabe der Erfindung ist, eine rasch lösbare Verbindung von einem Schmelzenbehälter und einer Stranggußkokille zu schaffen, die die Nachteile der oben angeführten Vorrichtungen nicht aufweist.The object of the invention is to provide a quickly releasable connection of a melt container and a continuous casting mold, which does not have the disadvantages of the above-mentioned devices.
Die erfindungsgemäße Stranggußvorrichtung für hochschmelzende Metalle und deren Legierungen, z.B. Stahl, mit einem Schmelzenbehälter, welcher zumindest einen Kanal aufweist, der mit dem Hohlraum einer im wesentlichen horizontal angeordneten Kokille über zumindest einen keramischen Düsenstein verbunden ist, wobei zwischen Düsenstein und Schmelzenbehälter eine Dichtung angeordnet ist, besteht darin, daß die Dichtung aus einem Vlies aus Aluminiumoxidfasern besteht, und daß der Düsenstein die Dichtung durchsetzt und bis in den Kanal reicht, wobei die Dichtflächen im wesentlichen eben sind. Durch eine derartige Anordnung ist der direkte Kontakt zwischen Metallschmelze und dem Vlies verhindert, sodaß keine Auflösung des Vlieses und damit Verunreinigung der Metallschmelze bedingt wird. Durch die ebenen Dichtflächen wirken auf die keramischen Bestandteile im wesentlichen nur Druckkräfte. Das Fasemvlies bewirkt einerseits einen Ausgleich von Unebenheiten und andererseits wirkt es als Dichtung für jene Metallschmelze, die noch zwischen Düsenstein und Innenfläche des Kanals herausdringen kann.The continuous casting device according to the invention for refractory metals and their alloys, e.g. Steel, with a melt container which has at least one channel which is connected to the cavity of a substantially horizontally arranged mold via at least one ceramic nozzle block, a seal being arranged between the nozzle block and the melt container, consists in the seal being made of a nonwoven Aluminum oxide fibers exist, and that the nozzle block penetrates the seal and extends into the channel, the sealing surfaces being essentially flat. Such an arrangement prevents direct contact between the molten metal and the fleece, so that no dissolution of the fleece and thus contamination of the molten metal is caused. Due to the flat sealing surfaces, essentially only compressive forces act on the ceramic components. The fiber fleece on the one hand compensates for unevenness and on the other hand it acts as a seal for the molten metal that can still penetrate between the nozzle stone and the inner surface of the channel.
Gemäß einem weiteren Merkmal der Erfindung ist ein einteiliger Düsenstein vorgesehen, welcher in die Kokille und in den Kanal des Schmelzenbehälters reicht. Damit kann eine besonders einfache Verbindung zwischen Kokille und Schmelzenbehälter erhalten werden, wobei keinerlei Verunreinigungen in die Metallschmelze gelangen können und gleichzeitig eine Justierung erfolgt.According to a further feature of the invention, a one-piece nozzle block is provided which extends into the mold and into the channel of the melt container. In this way, a particularly simple connection between the mold and the melt container can be obtained, wherein no contaminants can get into the molten metal and an adjustment is carried out at the same time.
Im folgenden wird die Erfindung an Hand einer Zeichnung näher erläutert:
- In die Öffnung des Kanales 2 des eine feuerfeste Ausmauerung
aufweisenden Schmelzenbehälters 1 ragt mit seinemKragenteil 4a der gegen den Verteiler hin, eine zylindrische, in eine gegen die Kokille hin kegelförmig sich erweiternde Öffnung übergehende Öffnung aufweisende Düsenstein 4, der mit seiner, dem Verteilerstein 2 zugekehrten Stirnfläche 4b stumpfstoßend an dieStirnfläche 2a des Kanales 2 angeordnet ist.
- The
collar part 4a of themelt container 1, which has a refractory lining, projects into the opening of the channel 2 with a collar nozzle 4 towards the distributor, a cylindrical nozzle opening into an opening that widens conically towards the mold facing end face 4b is butting against theend face 2a of the channel 2.
Zwischen den genannten Stirnflächen 2a und 4b ist die erfindungsgemäß vorgesehene Dichtung 3 auf Basis von A1203-Fasern ringförmig angeordnet. Die Dicke der Dichtung ist ca. 3 mm, wenn sie noch nicht zwischen Kanal und Düsenstein gepreßt ist, wird jedoch bei Druckbeaufschlagung ca. 1,5 mm dick.Between the
Der Teilabschnitt 5 des Düsensteines weist in der gezeigten Ausführungsform eine gegen den Verteiler hin zylindrische, und gegen die Kokille hin eine sich kegelförmig erweiternde Öffnung auf. Die Außenfläche des Kokillensteines ist ebenfalls leicht geneigt zylindermantelförmig ausgebildet, sodaß der Stein 5 entlang einer kreisförmigen Dichtlinie im Endbereich der an ihn grenzenden, durch eine Kühlflüssigkeit 7 gekühlten Strangguß-Kokille 6 "steckt".In the embodiment shown, the
Vorteilhaft ist der durch eine unterbrochene Linie angedeutete, kreisförmige Grat 5a des Kokillensteines durch eine ringförmige Ebene 5b ersetzt, wodurch die Erosion wesentlich herabgesetzt ist.The
Der Düsenstein besteht aus Zirkonoxid, wobei zumindest die Oberfläche 5c der Durchflußöffnung aus feinkörnigem Zirkonoxid gebildet ist.The nozzle block consists of zirconium oxide, at least the
Die einstückige Ausbildung des Zirkonoxid-Düsensteines vermeidet alle infolge unterschiedlicher Ausdehnungskoeffizienten der beiden Teile des Steines auftretenden Probleme, und insbesondere eine Gefährdung des zwischen den Teilen liegenden Spaltes durch Erosion.The one-piece design of the zirconium oxide nozzle stone avoids all problems arising as a result of different coefficients of expansion of the two parts of the stone, and in particular the erosion of the gap between the parts.
Die Kokille 6, der gegebenenfalls einstückige Düsenstein 4, 5 und der Verteiler 1 können bespielsweise durch nicht gezeigte Bolzen und Schrauben miteinander fest verbunden werden, wobei der beim Festziehen der Schraubverbindung auftretende Preßdruck ausreicht, um mit der erfindungsgemäßen Dichtung auf Basis von A1203-Fasern eine sichere Abdichtung der mit ihr versehenen Dichtflächen zu erreichen.The mold 6, the possibly one-
Die Kokille 6 kann auch auf einem beweglichen Schlitten montiert sein und mittels Federkraft gegen den Düsenstein und dieser gegen den Verteiler hin gepreßt sein, wodurch die an zumindest einer Dichtfläche erfindungsgemäß angeordnete Dichtung auf Ai203-Basis in Lage gehalten wird und dort ihre Dichtfunktion ausübt.The mold 6 can also be mounted on a movable slide and pressed by spring force against the nozzle block and this against the distributor, as a result of which the seal based on Ai203 based on at least one sealing surface is held in position and performs its sealing function there.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT81890156T ATE9286T1 (en) | 1980-10-01 | 1981-09-28 | CONTINUOUS CASTING DEVICE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803037059 DE3037059A1 (en) | 1980-10-01 | 1980-10-01 | CONTINUOUS CASTING DEVICE |
| DE3037059 | 1980-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0049239A1 true EP0049239A1 (en) | 1982-04-07 |
| EP0049239B1 EP0049239B1 (en) | 1984-09-12 |
Family
ID=6113335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81890156A Expired EP0049239B1 (en) | 1980-10-01 | 1981-09-28 | Continuous-casting device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0049239B1 (en) |
| AT (1) | ATE9286T1 (en) |
| DE (2) | DE3037059A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092539A1 (en) * | 1982-04-20 | 1983-10-26 | VOEST-ALPINE Aktiengesellschaft | Horizontal continuous casting plant for continuously casting a strand having a slab cross-sectional format |
| EP0149164A3 (en) * | 1984-01-13 | 1985-08-21 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Pouring nozzle consisting of several longitudinal sections for supplying liquid metal into the mould for continuous casting and process of making such a nozzle |
| EP0153014A1 (en) * | 1984-01-25 | 1985-08-28 | Imi Refiners Limited | Casting apparatus and method for the horizontal casting of copper |
| EP0251570A3 (en) * | 1986-06-20 | 1988-04-27 | Steel Casting Engineering, Ltd. | Horizontal continuous casting mould |
| AT407350B (en) * | 1998-02-18 | 2001-02-26 | Thoeni Industriebetriebe Gmbh | DEVICE FOR HORIZONTAL CONTINUOUS CASTING OF PROFILES, ESPECIALLY METAL STRIPS |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH440571A (en) * | 1965-05-14 | 1967-07-31 | Machin Anstalt | Feeding device of a continuous casting mold |
| DE2355015A1 (en) * | 1972-11-06 | 1974-05-16 | Siderurgie Fse Inst Rech | CASTING DEVICE WITH HORIZONTAL SLIDING CLOTH |
-
1980
- 1980-10-01 DE DE19803037059 patent/DE3037059A1/en not_active Withdrawn
-
1981
- 1981-09-28 AT AT81890156T patent/ATE9286T1/en active
- 1981-09-28 DE DE8181890156T patent/DE3166053D1/en not_active Expired
- 1981-09-28 EP EP81890156A patent/EP0049239B1/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH440571A (en) * | 1965-05-14 | 1967-07-31 | Machin Anstalt | Feeding device of a continuous casting mold |
| DE2355015A1 (en) * | 1972-11-06 | 1974-05-16 | Siderurgie Fse Inst Rech | CASTING DEVICE WITH HORIZONTAL SLIDING CLOTH |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092539A1 (en) * | 1982-04-20 | 1983-10-26 | VOEST-ALPINE Aktiengesellschaft | Horizontal continuous casting plant for continuously casting a strand having a slab cross-sectional format |
| EP0149164A3 (en) * | 1984-01-13 | 1985-08-21 | Fried. Krupp Gesellschaft Mit Beschrankter Haftung | Pouring nozzle consisting of several longitudinal sections for supplying liquid metal into the mould for continuous casting and process of making such a nozzle |
| EP0153014A1 (en) * | 1984-01-25 | 1985-08-28 | Imi Refiners Limited | Casting apparatus and method for the horizontal casting of copper |
| US4730659A (en) * | 1984-01-25 | 1988-03-15 | Imi Refiners Ltd. | Casting apparatus |
| EP0251570A3 (en) * | 1986-06-20 | 1988-04-27 | Steel Casting Engineering, Ltd. | Horizontal continuous casting mould |
| AT407350B (en) * | 1998-02-18 | 2001-02-26 | Thoeni Industriebetriebe Gmbh | DEVICE FOR HORIZONTAL CONTINUOUS CASTING OF PROFILES, ESPECIALLY METAL STRIPS |
| US6554055B1 (en) | 1998-02-18 | 2003-04-29 | Thoeni Industriebetriebe Gmbh | Device for the continuous horizontal casting of profiled members, in particular of metal strips |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3037059A1 (en) | 1982-04-29 |
| EP0049239B1 (en) | 1984-09-12 |
| DE3166053D1 (en) | 1984-10-18 |
| ATE9286T1 (en) | 1984-09-15 |
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