EP0855238A1 - Process for vertical continuous casting of metals - Google Patents

Process for vertical continuous casting of metals Download PDF

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Publication number
EP0855238A1
EP0855238A1 EP97810035A EP97810035A EP0855238A1 EP 0855238 A1 EP0855238 A1 EP 0855238A1 EP 97810035 A EP97810035 A EP 97810035A EP 97810035 A EP97810035 A EP 97810035A EP 0855238 A1 EP0855238 A1 EP 0855238A1
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EP
European Patent Office
Prior art keywords
level
metal
molds
starting
casting
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.)
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EP97810035A
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German (de)
French (fr)
Inventor
Eric Vuignier
Etienne Caloz
Jean-Pierre Seppey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
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Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8230140&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0855238(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to EP97810035A priority Critical patent/EP0855238A1/en
Priority to EP98900062A priority patent/EP0959995B1/en
Priority to US09/355,241 priority patent/US6260603B1/en
Priority to AT98900062T priority patent/ATE211039T1/en
Priority to AU53053/98A priority patent/AU716841B2/en
Priority to CA002277959A priority patent/CA2277959C/en
Priority to DE59802528T priority patent/DE59802528D1/en
Priority to PCT/CH1998/000004 priority patent/WO1998032559A1/en
Publication of EP0855238A1 publication Critical patent/EP0855238A1/en
Priority to IS5111A priority patent/IS2026B/en
Priority to NO993589A priority patent/NO993589L/en
Withdrawn legal-status Critical Current

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    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/161—Controlling or regulating processes or operations for automatic starting the casting process
    • 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
    • B22D11/147—Multi-strand plants
    • 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
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the invention relates to a method for automatic vertical continuous casting metals, especially aluminum alloys, in a multi-mold Casting plant, in which process the liquid metal from in an oven through a trough to the molds and via nozzles with adjustable flow into the from on one lowerable casting table arranged approach floors first closed molds is passed, the metal flow rate each nozzle, starting from an initial time and an initial level of the metal at which the metal level control begins individually regulated in each mold is that the metal in all molds to a predetermined Starting time is essentially the same starting level has, in which the lowering of the casting table for generation the metal strands begins.
  • Crucial for the trouble-free operation of a multi-strand Casting system is mastery of the start-up process, i.e. the optimal control of the metal feed to the individual casting units until the actual casting start, which is initiated by lowering the casting table.
  • the metal flow rate by means of a motor-driven Plug rod can be set changeable can At the same time in a known manner about level measuring devices the metal level in each mold is measured continuously, compared with the setpoint and the difference between actual and setpoint by appropriate control of the plug rod drive in the associated Inject the speed of the metal feed into the mold customized.
  • From GB-A-2 099 189 is a metal level control for a multi-strand casting system known, with the reaching of a first metal level in a mold linearly increasing setpoint to a common for all molds second level is specified.
  • the regulation of Metal level in the individual molds is due to the increasing target value as soon as this in the individual molds is reached.
  • EP-B-0 517 629 discloses a method of the aforementioned Type in which the individual metal level control in every mold as soon as the incoming metal a predetermined minimum height above the respective approach floor has reached. Starting from this minimum height above the Approach floor, the level control takes place in each mold individual, linearly increasing setpoint curves, so that a predetermined, common level in all molds are reached at the same time.
  • a major disadvantage of the state of the art Technology with different filling curves for each mold is in danger of the system getting out of control, if one of the ingot molds becomes frozen due to premature solidification Metal melt not to be filled or with a great delay begins.
  • there can be big differences in the filling kinetics occur when lowering the casting table, if individual Fill molds too late and therefore towards the end of the filling process have a steep filling curve.
  • the algorithm also makes filling curves much more complicated.
  • the invention is therefore based on the object of a method to create the type mentioned, in which the metal stand in the individual molds during start-up and Chill filling phase in a simple way and in as much as possible a short time to start lowering the casting table predetermined level can be regulated without there is a risk of metal freezing.
  • the metal level during the filling process between the initial level at the start time and the start level at the start time in all molds simultaneously and as a function of time according to a setpoint curve that is identical for all molds N f (t) is regulated, the slope dN / dt of the setpoint curve being greater in a region starting from the starting level and smaller in an area against the starting level than the mean gradient between the starting and starting levels.
  • the part of the setpoint curve preferably extends with the major slope, starting from the initial level, in one Range from about 10 to 70%, preferably 30 to 60%, of the total Level increase.
  • the part of the setpoint curve with the a smaller slope against the starting level preferably extends over a range of 10 to 40%, preferably 15 up to 25% of the total level increase.
  • the method according to the invention starts the metal level control in all molds at the same time, as soon as in one mold the initial level has been reached. Conveniently also starts lowering the casting table with the approach floors, as soon as the start level is reached in a mold.
  • the metal level in the launder is also preferred Start of the filling phase of the start-up floors and the molds up to and with the stationary casting phase at a constant level held.
  • the metal feed into the molds based on the setpoint curve is preferably PID-controlled.
  • the setpoint curve shown in FIG. 2 can be divided into an area A starting from the initial value N o and into an adjoining area B running against the starting level N s . It is readily apparent that the area A of the setpoint curve is opposite the mean slope Ns-No ts-to has a larger slope. Accordingly, there is a smaller slope for area B.
  • the setpoint curve is formed by 6 pairs of measured values N x , t x .
  • the embodiment shown in the drawing relates to the continuous casting of an aluminum alloy in a conventional mold.
  • the inventive the process is also the same for other casting processes for example when casting in an electromagnetic Alternating field (EMC) applicable.
  • EMC electromagnetic Alternating field
  • the process is also not based on the casting of aluminum alloys limited.
  • Other materials with the inventive Processes can be cast into strands are e.g. Magnesium or copper alloys.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The method for continuous vertical casting of metals in a casting installation with several moulds is characterised by the fact that the melt level (N) during the mould filling process between the initial level (No) at the initial time (to) and the start level (Ns) at the start time (ts) is regulated in all moulds simultaneously and as a function of the time (t) according to a target value curve N=f(t) which is identical for all moulds. The slope of this curve within a region (A) adjacent to the initial level (No) is greater than the mean slope between the initial and start levels, while in a region (B) adjacent to the start level (Ns) it is smaller than the mean slope.

Description

Die Erfindung betrifft ein Verfahren zum automatischen Vertikalstranggiessen von Metallen, insbesondere von Aluminiumlegierungen, in einer mehrere Kokillen umfassenden Giessanlage, bei welchem Verfahren das flüssige Metall von einem Ofen über eine Giessrinne an die Kokillen herangeführt und über Düsen mit regelbarem Durchfluss in die von auf einem absenkbaren Giesstisch angeordneten Anfahrböden zunächst geschlossenen Kokillen geleitet wird, wobei die Metalldurchflussmenge jeder Düse, ausgehend von einer Anfangszeit und einem Anfangsniveau des Metalls, bei der die Metallstandsregelung beginnt, in jeder Kokille individuell so geregelt wird, dass das Metall in allen Kokillen zu einer vorbestimmten Startzeit ein im wesentlichen gleiches Startniveau aufweist, bei dem das Absenken des Giesstisches zur Erzeugung der Metallstränge beginnt.The invention relates to a method for automatic vertical continuous casting metals, especially aluminum alloys, in a multi-mold Casting plant, in which process the liquid metal from in an oven through a trough to the molds and via nozzles with adjustable flow into the from on one lowerable casting table arranged approach floors first closed molds is passed, the metal flow rate each nozzle, starting from an initial time and an initial level of the metal at which the metal level control begins individually regulated in each mold is that the metal in all molds to a predetermined Starting time is essentially the same starting level has, in which the lowering of the casting table for generation the metal strands begins.

Entscheidend für den störungsfreien Betrieb einer mehrsträngigen Giessanlage ist die Beherrschung des Anfahrvorganges, d.h. die optimale Steuerung der Metallzufuhr zu den einzelnen Giesseinheiten bis zum eigentlichen Giessstart, der durch das Absenken des Giesstisches eingeleitet wird.Crucial for the trouble-free operation of a multi-strand Casting system is mastery of the start-up process, i.e. the optimal control of the metal feed to the individual casting units until the actual casting start, which is initiated by lowering the casting table.

Während der Anfahrboden- und Kokillen-Füllphase erfolgt üblicherweise eine individuelle Regelung der Metallzufuhr zu den einzelnen Kokillen über diesen zugeordnete Düsen, deren Metalldurchflussmenge mittels einer motorisch angetriebenen Stopfenstange veränderbar eingestellt werden kann. Gleichzeitig wird in bekannter Weise über Niveaumessgeräte der Metallstand in jeder Kokille kontinuierlich gemessen, mit der Sollwertvorgabe verglichen und über die Differenz zwischen Ist- und Sollwert durch entsprechende Ansteuerung des Stopfenstangen-Antriebs in der zugehörigen Düse die Geschwindigkeit der Metallzufuhr in die Kokille angepasst. During the start-up floor and mold filling phase usually an individual regulation of the metal supply to the individual molds via nozzles assigned to them, the metal flow rate by means of a motor-driven Plug rod can be set changeable can. At the same time in a known manner about level measuring devices the metal level in each mold is measured continuously, compared with the setpoint and the difference between actual and setpoint by appropriate control of the plug rod drive in the associated Inject the speed of the metal feed into the mold customized.

Aus der GB-A-2 099 189 ist eine Metallstandsregelung für eine mehrsträngige Giessanlage bekannt, bei der mit dem Erreichen eines ersten Metallniveaus in einer Kokille ein zeitlich linear ansteigender Sollwert auf ein für alle Kokillen gemeinsames zweites Niveau vorgegeben wird. Die Regelung des Metallstandes in den einzelnen Kokillen erfolgt aufgrund des ansteigenden Sollwertes, sobald dieser in den einzelnen Kokillen erreicht ist.From GB-A-2 099 189 is a metal level control for a multi-strand casting system known, with the reaching of a first metal level in a mold linearly increasing setpoint to a common for all molds second level is specified. The regulation of Metal level in the individual molds is due to the increasing target value as soon as this in the individual molds is reached.

Die EP-B-0 517 629 offenbart ein Verfahren der eingangs genannten Art, bei dem die individuelle Metallstandsregelung in jeder Kokille einsetzt, sobald das einströmende Metall eine vorbestimmte Minimalhöhe über dem jeweiligen Anfahrboden erreicht hat. Ausgehend von dieser Minimalhöhe über dem Anfahrboden erfolgt die Niveauregelung in jeder Kokille aufgrund individueller, zeitlich linear ansteigender Sollwertkurven, so dass ein vorbestimmtes, gemeinsames Niveau in allen Kokillen gleichzeitig erreicht wird.EP-B-0 517 629 discloses a method of the aforementioned Type in which the individual metal level control in every mold as soon as the incoming metal a predetermined minimum height above the respective approach floor has reached. Starting from this minimum height above the Approach floor, the level control takes place in each mold individual, linearly increasing setpoint curves, so that a predetermined, common level in all molds are reached at the same time.

Ein wesentlicher Nachteil der Verfahren nach dem Stand der Technik mit unterschiedlichen Füllkurven für jede Kokille liegt in der Gefahr, dass das System ausser Kontrolle gerät, wenn sich eine der Kokillen wegen vorzeitiger Erstarrung von Metallschmelze nicht oder mit grosser Verspätung zu füllen beginnt. Zudem können grosse Unterschiede in der Füllkinetik beim Absenken des Giesstisches auftreten, wenn sich einzelne Kokillen zu spät füllen und demzufolge gegen Ende des Füllvorgangs eine steile Füllkurve aufweisen. Bei unterschiedlichen Füllkurven wird auch der Algorithmus wesentlich komplizierter.A major disadvantage of the state of the art Technology with different filling curves for each mold is in danger of the system getting out of control, if one of the ingot molds becomes frozen due to premature solidification Metal melt not to be filled or with a great delay begins. In addition, there can be big differences in the filling kinetics occur when lowering the casting table, if individual Fill molds too late and therefore towards the end of the filling process have a steep filling curve. With different The algorithm also makes filling curves much more complicated.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, bei dem der Metallstand in den einzelnen Kokillen während der Anfahrboden- und Kokillen-Füllphase auf einfache Weise und in möglichst kurzer Zeit auf ein für den Beginn des Absenkens des Giesstisches vorbestimmtes Niveau geregelt werden kann, ohne dass die Gefahr des Einfrierens von Metall besteht.The invention is therefore based on the object of a method to create the type mentioned, in which the metal stand in the individual molds during start-up and Chill filling phase in a simple way and in as much as possible a short time to start lowering the casting table predetermined level can be regulated without there is a risk of metal freezing.

Zur erfindungsgemässen Lösung der Aufgabe führt, dass das Metallniveau während des Füllvorganges zwischen dem Anfangsniveau bei der Anfangszeit und dem Startniveau bei der Startzeit in allen Kokillen gleichzeitig und als Funktion der Zeit nach einer für alle Kokillen identischen Sollwertkurve N=f(t) geregelt wird, wobei die Steigung dN / dt der Sollwertkurve in einem Bereich ausgehend vom Anfangsniveau grösser und in einem Bereich gegen das Startniveau kleiner ist als die mittlere Steigung zwischen Anfangs- und Startniveau.In order to achieve the object according to the invention, the metal level during the filling process between the initial level at the start time and the start level at the start time in all molds simultaneously and as a function of time according to a setpoint curve that is identical for all molds N = f (t) is regulated, the slope dN / dt of the setpoint curve being greater in a region starting from the starting level and smaller in an area against the starting level than the mean gradient between the starting and starting levels.

Bevorzugt erstreckt sich der Teil der Sollwertkurve mit der grösseren Steigung, ausgehend vom Anfangsniveau, in einem Bereich von etwa 10 bis 70%, vorzugsweise 30 bis 60%, des gesamten Niveauanstiegs. Der Teil der Sollwertkurve mit der kleineren Steigung gegen das Startniveau erstreckt sich bevorzugt über einen Bereich von 10 bis 40%, vorzugsweise 15 bis 25%, des gesamten Niveauanstiegs.The part of the setpoint curve preferably extends with the major slope, starting from the initial level, in one Range from about 10 to 70%, preferably 30 to 60%, of the total Level increase. The part of the setpoint curve with the a smaller slope against the starting level preferably extends over a range of 10 to 40%, preferably 15 up to 25% of the total level increase.

In der Praxis hat sich gezeigt, dass eine genügend genaue Regelung erzielt werden kann, wenn die Sollwertkurve aus 4 bis 8, vorzugsweise 5 bis 6, Wertepaaren zusammengesetzt ist.In practice it has been shown that a sufficiently accurate Regulation can be achieved if the setpoint curve from 4 to 8, preferably 5 to 6, pairs of values is.

Bei einer einfachen und zweckmässigen Durchführungsform des erfindungsgemässen Verfahrens beginnt die Metallstandsregelung in allen Kokillen gleichzeitig, sobald in einer Kokille das Anfangsniveau erreicht ist. Zweckmässigerweise beginnt auch das Absenken des Giesstisches mit den Anfahrböden, sobald in einer Kokille das Startniveau erreicht ist.With a simple and convenient implementation of the The method according to the invention starts the metal level control in all molds at the same time, as soon as in one mold the initial level has been reached. Conveniently also starts lowering the casting table with the approach floors, as soon as the start level is reached in a mold.

Bevorzugt wird auch der Metallstand in der Giessrinne vom Beginn der Füllphase der Anfahrböden und der Kokillen bis und mit der stationären Giessphase auf einem konstanten Niveau gehalten. The metal level in the launder is also preferred Start of the filling phase of the start-up floors and the molds up to and with the stationary casting phase at a constant level held.

Die Metallzufuhr in die Kokillen aufgrund der Sollwertkurve erfolgt bevorzugt PID-geregelt.The metal feed into the molds based on the setpoint curve is preferably PID-controlled.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Bescheibung eines bevorzugten Ausführungsbeispiels sowie anhand der Zeichnung; diese zeigt schemtisch in

- Fig. 1
einen vereinfachten Querschnitt durch einen Teil einer Kokille mit eingefahrenem Anfahrboden;
- Fig. 2
eine Sollwertkurve des zeitlichen Verlaufs des Metallstandes in den einzelnen Kokillen.
Further advantages, features and details of the invention result from the following description of a preferred exemplary embodiment and from the drawing; this shows schematically in
- Fig. 1
a simplified cross section through part of a mold with a retracted base;
- Fig. 2
a setpoint curve of the time course of the metal level in the individual molds.

Vor Beginn eines Abgusses werden während einer Prüfphase sämtliche Einstellungen an der Giessanlage überprüft. Wenn sämtliche Startbedingungen erfüllt sind, wird durch Kippen des das flüssige Metall enthaltenden Ofens die Giessrinne bis auf ein vorgegebenes Metallniveau gefüllt. Sobald ein Sensor -- z.B. ein induktiver Messwertgeber -- die richtige Füllhöhe anzeigt, öffnet sich ein Schieber und das Füllen der Anfahrböden 12 und der Kokillen 10 mit dem flüssigem Metall 14 beginnt. Der Metallstand im Anfahrboden 12 bzw. in der Kokille 10 erfolgt z.B. PID-geregelt über einen induktiven Messwertgeber.Before a casting is started, during a test phase all settings on the casting machine checked. If all starting conditions are met by tilting of the furnace containing the liquid metal filled to a predetermined metal level. Once a Sensor - e.g. an inductive sensor - the right one Level shows, a slide opens and the filling of the Start-up floors 12 and the molds 10 with the liquid metal 14 begins. The metal level in the approach floor 12 or in the Mold 10 takes place e.g. PID controlled via an inductive Sensor.

Sobald das Metall in einer Kokille einen vorbestimmten Wert No erreicht hat, beginnt in allen Kokillen der Giessanlage die Metallstandsregelung aufgrund einer gemeinsamen Sollwertkurve N=f(t) vom Anfangsniveau No bei der Anfangszeit to bis zum Startniveau Ns bei der Startzeit ts, wo das Absenken des Giesstisches zur Erzeugung der Metallstränge beginnt.As soon as the metal in a mold has reached a predetermined value N o , the metal level control begins in all the molds of the casting plant based on a common setpoint curve N = f (t) from the starting level N o at the starting time t o to the starting level N s at the starting time t s , where the lowering of the casting table for producing the metal strands begins.

Die in Fig. 2 gezeigte Sollwertkurve kann in einen vom Anfangswert No ausgehenden Bereich A und in einen daran anschliessenden, gegen das Startniveau Ns verlaufenden Bereich B aufgeteilt werden. Es ist ohne weiteres ersichtlich, dass der Bereich A der Sollwertkurve eine gegenüber der mittleren Steigung Ns-Nots-to grössere Steigung aufweist. Entsprechend ergibt sich für den Bereich B eine kleinere Steigung. Im gezeigten Beispiel ist die Sollwertkurve durch 6 Messwertpaare Nx,tx gebildet.The setpoint curve shown in FIG. 2 can be divided into an area A starting from the initial value N o and into an adjoining area B running against the starting level N s . It is readily apparent that the area A of the setpoint curve is opposite the mean slope Ns-No ts-to has a larger slope. Accordingly, there is a smaller slope for area B. In the example shown, the setpoint curve is formed by 6 pairs of measured values N x , t x .

Das in der Zeichnung wiedergegebene Ausführungsbeispiel bezieht sich auf das Stranggiessen einer Aluminiumlegierung in einer konventionellen Kokille. Das erfindungsgemässe Verfahren ist jedoch auch bei anderen Giessverfahren wie beispielsweise beim Giessen in einem elektromagnetischen Wechselfeld (EMC) anwendbar.The embodiment shown in the drawing relates to the continuous casting of an aluminum alloy in a conventional mold. The inventive However, the process is also the same for other casting processes for example when casting in an electromagnetic Alternating field (EMC) applicable.

Das Verfahren ist auch nicht auf das Giessen von Aluminiumlegierungen beschränkt. Weitere Werkstoffe, die mit dem erfindungsgemässen Verfahren zu Strängen vergossen werden können, sind z.B. Magnesium- oder Kupferlegierungen.The process is also not based on the casting of aluminum alloys limited. Other materials with the inventive Processes can be cast into strands are e.g. Magnesium or copper alloys.

Claims (7)

Verfahren zum automatischen Vertikalstranggiessen von Metallen, insbesondere von Aluminiumlegierungen, in einer mehrere Kokillen umfassenden Giessanlage, bei welchem Verfahren das flüssige Metall von einem Ofen über eine Giessrinne an die Kokillen herangeführt und über Düsen mit regelbarem Durchfluss in die von auf einem absenkbaren Giesstisch angeordneten Anfahrböden zunächst geschlossenen Kokillen geleitet wird, wobei die Metalldurchflussmenge jeder Düse, ausgehend von einer Anfangszeit (to) und einem Anfangsniveau (No) des Metalls, bei der die Metallstandsregelung beginnt, in jeder Kokille individuell so geregelt wird, dass das Metall in allen Kokillen zu einer vorbestimmten Startzeit (ts) ein im wesentlichen gleiches Startniveau (Ns) aufweist, bei dem das Absenken des Giesstisches zur Erzeugung der Metallstränge beginnt,
dadurch gekennzeichnet, dass
das Metallniveau (N) während des Füllvorganges zwischen dem Anfangsniveau (No) bei der Anfangszeit (to) und dem Startniveau (Ns), bei der Startzeit (ts) in allen Kokillen gleichzeitig und als Funktion der Zeit (t) nach einer für alle Kokillen identischen Sollwertkurve N=f(t) geregelt wird, wobei die Steigung dN / dt der Sollwertkurve in einem Bereich (A) ausgehend vom Anfangsniveau (No) grösser und in einem Bereich (B) gegen das Startniveau (Ns) kleiner ist als die mittlere Steigung (Ns-Nots-to ) zwischen Anfangs- und Startniveau.Process for the automatic vertical continuous casting of metals, in particular aluminum alloys, in a casting plant comprising several molds, in which process the liquid metal is brought to the molds from a furnace via a casting trough and via nozzles with adjustable flow into the start-up floors arranged on a lowerable casting table closed molds is passed, whereby the metal flow rate of each nozzle, based on an initial time (t o ) and an initial level (N o ) of the metal at which the metal level control begins, is individually regulated in each mold so that the metal in all molds a predetermined starting time (t s ) has an essentially identical starting level (N s ) at which the lowering of the casting table for producing the metal strands begins,
characterized in that
the metal level (N) during the filling process between the initial level (N o ) at the starting time (t o ) and the starting level (N s ), at the starting time (t s ) in all molds simultaneously and as a function of time (t) a setpoint curve identical for all molds N = f (t) is regulated, the slope dN / dt of the setpoint curve being greater in a region (A) starting from the starting level (N o ) and smaller in an area (B) against the starting level (N s ) than the mean gradient ( Ns-No ts-to ) between start and start level. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Steigung dN / dt der Sollwertkurve N=f(t), ausgehend vom Anfangsniveau (No), in einem Bereich von 10 bis 70%, vorzugsweise 30 bis 60%, des gesamten Niveauanstiegs (Ns-No) grösser und gegen das Startniveau (Ns) in einem Bereich von 10 bis 40%, vorzugsweise 15 bis 25%, des gesamten Niveauanstiegs kleiner ist als die mittlere Steigung (Ns-Nots-to ) zwischen Anfangs- und Startniveau.A method according to claim 1, characterized in that the slope dN / dt of the setpoint curve N = f (t) , starting from the initial level (N o ), in a range of 10 to 70%, preferably 30 to 60%, of the total level increase (N s -N o ) larger and against the starting level (N s ) in a range of 10 to 40 %, preferably 15 to 25%, of the total increase in level is less than the mean slope ( Ns-No ts-to ) between start and start level. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Sollwertkurve aus 4 bis 8, vorzugsweise 5 bis 6, Wertepaaren (Nx,tx) zusammengesetzt ist.Method according to claim 1 or 2, characterized in that the setpoint curve is composed of 4 to 8, preferably 5 to 6, pairs of values (N x , t x ). Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Metallstandsregelung in allen Kokillen gleichzeitig beginnt, sobald in einer Kokille das Anfangsniveau (No) erreicht ist.Method according to one of claims 1 to 3, characterized in that the metal level control in all molds begins simultaneously as soon as the initial level (N o ) is reached in a mold. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Absenken des Giesstisches mit den Anfahrböden beginnt, sobald in einer Kokille das Startniveau (Ns) erreicht ist.Method according to one of claims 1 to 4, characterized in that the lowering of the casting table begins with the approach floors as soon as the start level (N s ) is reached in a mold. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Metallstand in der Giessrinne vom Beginn der Füllphase der Anfahrböden und der Kokillen bis und mit der stationären Giessphase auf einem konstanten Niveau gehalten wird.Method according to one of claims 1 to 5, characterized in that that the metal level in the gutter from the start of the filling phase of the approach floors and the molds up to and including the stationary casting phase on one is kept constant. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Metallzufuhr in die Kokillen aufgrund der Sollwertkurve PID-geregelt erfolgt.Method according to one of claims 1 to 6, characterized in that that the metal feed into the molds PID-controlled based on the setpoint curve.
EP97810035A 1997-01-24 1997-01-24 Process for vertical continuous casting of metals Withdrawn EP0855238A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP97810035A EP0855238A1 (en) 1997-01-24 1997-01-24 Process for vertical continuous casting of metals
PCT/CH1998/000004 WO1998032559A1 (en) 1997-01-24 1998-01-07 Method for vertical continuous casting of metals
AU53053/98A AU716841B2 (en) 1997-01-24 1998-01-07 Method for vertical,continuous casting of metals
US09/355,241 US6260603B1 (en) 1997-01-24 1998-01-07 Method for vertical continuous casting of metals
AT98900062T ATE211039T1 (en) 1997-01-24 1998-01-07 METHOD FOR VERTICAL CONTINUOUS CASTING OF METALS
EP98900062A EP0959995B1 (en) 1997-01-24 1998-01-07 Method for vertical continuous casting of metals
CA002277959A CA2277959C (en) 1997-01-24 1998-01-07 Method for vertical continuous casting of metals
DE59802528T DE59802528D1 (en) 1997-01-24 1998-01-07 METHOD FOR VERTICAL CONTINUOUS CASTING OF METALS
IS5111A IS2026B (en) 1997-01-24 1999-07-06 Method of casting metals vertically and continuously
NO993589A NO993589L (en) 1997-01-24 1999-07-22 Process for vertical, continuous casting of metals

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EP97810035A EP0855238A1 (en) 1997-01-24 1997-01-24 Process for vertical continuous casting of metals

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EP (2) EP0855238A1 (en)
AT (1) ATE211039T1 (en)
AU (1) AU716841B2 (en)
CA (1) CA2277959C (en)
DE (1) DE59802528D1 (en)
IS (1) IS2026B (en)
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WO (1) WO1998032559A1 (en)

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Publication number Priority date Publication date Assignee Title
EP0995523A1 (en) * 1998-10-23 2000-04-26 Alusuisse Technology & Management AG Vertical continuous casting plant with optimised molten metal level measuring
EP1486347A1 (en) * 2003-06-12 2004-12-15 Fuji Photo Film B.V. Aluminium alloy substrate for lithographic printing plate and method for producing the same
WO2018060246A1 (en) * 2016-09-27 2018-04-05 Hydro Aluminium Rolled Products Gmbh Method for the multiple casting of metal strands

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099189A (en) 1981-05-26 1982-12-01 Kaiser Aluminium Chem Corp Molten metal level control in continuous casting
EP0223078A1 (en) * 1985-10-26 1987-05-27 Metacon AG Method of starting a multi-strand continuous-casting installation
EP0517629B1 (en) 1991-06-07 1996-01-24 Aluminium Pechiney Method and apparatus for casting semi-finished products

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567935A (en) 1981-05-26 1986-02-04 Kaiser Aluminum & Chemical Corporation Molten metal level control in continuous casting
US4730660A (en) 1984-09-05 1988-03-15 Metacon Aktiengesellschaft Process for casting molten metal into several strands
CH682376A5 (en) * 1990-02-28 1993-09-15 Stopinc Ag A method for automatic casting of a continuous casting plant.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099189A (en) 1981-05-26 1982-12-01 Kaiser Aluminium Chem Corp Molten metal level control in continuous casting
DE3205480A1 (en) * 1981-05-26 1982-12-16 Kaiser Aluminum & Chemical Corp., 94643 Oakland, Calif. METHOD AND DEVICE FOR REGULATING THE METAL BATH LEVEL IN A MULTIPLE NUMBER OF VERTICAL CONTINUOUS OR SEMI-CONTINUOUS CASTING UNITS
EP0223078A1 (en) * 1985-10-26 1987-05-27 Metacon AG Method of starting a multi-strand continuous-casting installation
EP0517629B1 (en) 1991-06-07 1996-01-24 Aluminium Pechiney Method and apparatus for casting semi-finished products

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CA2277959A1 (en) 1998-07-30
DE59802528D1 (en) 2002-01-31
ATE211039T1 (en) 2002-01-15
IS5111A (en) 1999-07-06
EP0959995A1 (en) 1999-12-01
AU716841B2 (en) 2000-03-09
AU5305398A (en) 1998-08-18
NO993589D0 (en) 1999-07-22
US6260603B1 (en) 2001-07-17
WO1998032559A1 (en) 1998-07-30
IS2026B (en) 2005-08-15
NO993589L (en) 1999-09-24
EP0959995B1 (en) 2001-12-19
CA2277959C (en) 2004-03-16

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