EP0106791B1 - Continuous-casting device for stirring non solidified areas of a cast strand - Google Patents

Continuous-casting device for stirring non solidified areas of a cast strand Download PDF

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Publication number
EP0106791B1
EP0106791B1 EP83710061A EP83710061A EP0106791B1 EP 0106791 B1 EP0106791 B1 EP 0106791B1 EP 83710061 A EP83710061 A EP 83710061A EP 83710061 A EP83710061 A EP 83710061A EP 0106791 B1 EP0106791 B1 EP 0106791B1
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EP
European Patent Office
Prior art keywords
stirrer
strand
spray
tubes
arrangement according
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.)
Expired
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EP83710061A
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German (de)
French (fr)
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EP0106791A1 (en
Inventor
Jan Erik Dipl.-Ing. Eriksson
Mats Karlsson
Sten Dipl.-Ing. Kollberg
Bengt Mansson
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ABB Norden Holding AB
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ASEA AB
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Publication of EP0106791A1 publication Critical patent/EP0106791A1/en
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads

Definitions

  • the present invention relates to an arrangement in continuous casting for stirring the non-solidified areas of the casting strand according to the preamble of claim 1.
  • Such an arrangement is essentially known from EP-A-0 010 314.
  • the invention has for its object to develop a continuous casting arrangement of the type mentioned, in which intensive heat protection for the stirrer and an intensive cooling of the casting strand are made possible without the circulating currents mentioned which can weaken the stirrer field to a significant extent .
  • the arrangement according to the invention provides good cooling of the strand and can easily attach the cooling tubes in such a way that no circulating currents occur and the field of the stirrer is thus not shielded.
  • the invention also provides good protection against mechanical damage caused by the casting strand or the cold strand head if these should take an unintended path which would lead to a collision with the stirrer.
  • Figures 1 and 2 show a stirrer on a continuous casting strand for stirring the non-solidified areas of the casting strand.
  • a stirrer two or more can be present and these can be arranged directly next to one another in the longitudinal direction and / or transverse direction of the casting strand, or can be arranged in a zigzag or other manner in relation to the casting strand.
  • the stirrers are operated with two-phase, three-phase or multi-phase current with a frequency of 50 to 60 Hz for so-called billets, of approx. 25 Hz or less for so-called blooms and of less than 10 Hz for so-called billets Slabs are fed, but other frequencies can of course also occur within the scope of the inventive idea.
  • the stirrer (s) is / are designated 1 in FIG. 1, and the casting strand 2 is shown schematically. Between the stirrer 1 and the casting strand 2, a tube 3 is attached, which is provided with a plurality of spray nozzles 4 or spray openings, which are directed towards the nearest side of the casting strand or at the edges thereof. Cooling water is supplied via the pipe 3, with which the strand is sprayed, as a result of which it experiences a certain cooling.
  • the system is constructed in such a way that the resulting flow through parts forming closed conductor tracks is minimized.
  • FIG. 2 shows a stirrer 2 which is provided with two cooling tubes 3 'and 3 ", which together form a circle 5 which closes outside the field of the stirrer.
  • the resulting magnetic flux which is linked to this circle is - as shown in FIG. 2
  • the stirrer with the cooling tube is preferably made of non-magnetic material with high specific electrical resistance, for example austenitic stainless steel.
  • the stirrer in the bottom with a rail as protection against z. B. to provide the cold strand head that precedes the casting strand in continuous casting.
  • the spray water pipes 3 'and 3 are attached between the stirrer 1 and the casting strand 2 (see FIG. 3).
  • the spray nozzles 6 are sunk in the cooling pipes 3', 3" here. This prevents damage to the pipes, i.e. H. protection against the cold strand head is obtained.
  • a radiation protection 7 made of electrically non-conductive material, for example made of fibers, asbestos or the like, is attached between the cooling tubes 3 'and 3 "and laterally. This serves as very effective radiation protection on the stirrer and enables a connection of spray and case cooling water, the rinse water is sprayed out through the nozzles 6, and the case cooling water occurs in the cooling pipes inside the stirrer 1 (not shown).
  • the spray water pipes can, for example, be coated with aluminum oxide (Al 2 O 3 ). It is important that the radiation protection 7 also in remains non-conductive when wet, and its job is to increase the time constant for heating the stirrer.
  • FIG. 4 shows a casting strand 2, which is provided with cooling tubes 3 between the casting strand 2 and the stirrer 1, which, as already mentioned, are equipped with recessed nozzles 6.
  • cooling tubes 3 To the side of these tubes are further cooling tubes 8 which are provided with nozzles 9, the cooling water being directed directly at the stirrer, more precisely at the edges and parts of the side surfaces of the stirrer.
  • the other cooling tubes 3 are also provided with nozzles 10 for spraying the stirrer. This increases protection against heat radiation from the strand, and radiation protection 11 of the type described in connection with FIG. 3 is also present in this embodiment. Protection of the agitator housing against heat radiation from the strand is thus obtained.
  • the stirrer is also cooled by means of the nozzles (10), and this cooling of the stirrer effectively reduces the inductive heating caused by its losses, which heating takes place in addition to the heating by radiation from the casting strand.
  • the cooling water system consists of two parts: first, a pipe system separate from the stirrer for spray cooling through the pipes 3, which is constructed in such a way that circulating flows are avoided, and secondly, a system in the stirrer 1 for the usual internal cooling of the stirrer.
  • the radiation protection 11 can be provided with two side parts which serve as radiation protection for the edges of the stirrer.
  • the figures show how the tubes 3 'and 3 "run in the longitudinal direction of the stirrer. Since the exemplary embodiment shows a longitudinal stirrer, the tubes thus also run in the longitudinal direction of the strand. In the case of a transverse stirrer, these tubes would run perpendicular to the longitudinal direction of the strand. In general it can be said that the direction of the tubes coincides with the direction of propagation of the traveling field generated by the stirrer.

Description

Die vorliegende Erfindung betrifft eine Anordnung beim kontinuierlichen Stranggießen zum Umrühren der nicht erstarrten Bereiche des Gießstranges gemäß dem Oberbegriff des Anspruches 1. Eine solche Anordnung ist im wesentlichen bekannt aus der EP-A-0 010 314.The present invention relates to an arrangement in continuous casting for stirring the non-solidified areas of the casting strand according to the preamble of claim 1. Such an arrangement is essentially known from EP-A-0 010 314.

Beim kontinuierlichen Stranggießen ist man daran interessiert, den Gießstrang zu kühlen und gleichzeitig den Umrührer gegen chemische oder mechanische Beschädigungen durch den Strang oder den dem eigentlichen Strang vorausgehenden Kaltstrangkopf zu schützen. Man möchte den in einem Gehäuse untergebrachten Umrührer gegen die Wärmestrahlung vom Strang schützen und zugleich den Strang kühlen. Es ist jedoch schädlich, wenn man zwischen dem Strang und dem Umrührer Rohr- oder andere mechanische Konstruktionen anordnet, in denen durch Induktion des Umrührerfeldes Ströme fließen können, die eine das Feld des Umrührers gegenüber dem Strang abschirmende Wirkung erzeugen. Solche zirkulierenden Ströme zwischen Strang und Umrührer müssen daher vermieden werden.In continuous continuous casting, one is interested in cooling the casting strand and at the same time protecting the stirrer against chemical or mechanical damage from the strand or the cold strand head preceding the actual strand. One wants to protect the stirrer housed in a housing against the heat radiation from the strand and at the same time to cool the strand. However, it is detrimental to arrange pipe or other mechanical structures between the strand and the stirrer, in which currents can flow by induction of the stirrer field, which produce a shielding effect on the field of the stirrer from the strand. Such circulating currents between the strand and the stirrer must therefore be avoided.

Aus der EP-A-0 010 314 ist eine Anordnung der eingangs genannten Art bekannt, bei der in Längsrichtung oder in Querrichtung zum Strang angeordnete Wanderfeldrührer vorgesehen sind, bei denen im Bereich zwischen dem Umrührer und dem Gießstrang Spritzdüsen zur Kühlung der Wand des Gießstranges angeordnet sind. Hierbei besteht die obengenannte Gefahr, daß durch die Anordnung der Spritzdüsen und der zugehörigen Rohrleitungen Kreise gebildet werden, in welche vom magnetischen Feld des Umrührers Ströme induziert werden, die zu einer Schwächung des vom Umrührers in den Gießstrang eintretenden magnetischen Feld führen.From EP-A-0 010 314 an arrangement of the type mentioned at the outset is known, in which traveling field stirrers are provided in the longitudinal direction or in the transverse direction to the strand, in which spray nozzles are arranged in the region between the stirrer and the casting strand for cooling the wall of the casting strand are. There is the above-mentioned risk that circles are formed by the arrangement of the spray nozzles and the associated pipelines, into which currents are induced by the magnetic field of the stirrer, which lead to a weakening of the magnetic field entering the cast strand from the stirrer.

Der Erfindung liegt die Aufgabe zugrunde, eine Stranggießandordnung der eingangs genannten Art zu entwickeln, bei der ein intensiver Erwärmungsschutz für den Umrührer und eine intensive Kühlung des Gießstranges ermöglicht werden, ohne daß die genannten, eine Schwächung des Umrührerfeldes bewirkenden zirkulierenden Ströme in nennenswertem Umfang auftreten können.The invention has for its object to develop a continuous casting arrangement of the type mentioned, in which intensive heat protection for the stirrer and an intensive cooling of the casting strand are made possible without the circulating currents mentioned which can weaken the stirrer field to a significant extent .

Zur Lösung dieser Aufgabe wird eine Anordnung nach dem Oberbegriff des Anspruches 1 vorgeschlagen, die erfindungsgemäß die im kennzeichnenden Teil des Anspruches 1 genannten Merkmale hat.To solve this problem, an arrangement according to the preamble of claim 1 is proposed, which according to the invention has the features mentioned in the characterizing part of claim 1.

Vorteilhafte Weiterbildungen der Erfindung sind in den weiteren Ansprüchen genannt.Advantageous developments of the invention are mentioned in the further claims.

Durch die Anordnung gemäß der Erfindung erhält man eine gute Kühlung des Stranges und kann die Kühlrohre leicht so anbringen, daß keine zirkulierenden Ströme auftreten und das Feld des Umrührers somit nicht abgeschirmt wird. Durch die Erfindung erhält man ferner einen guten Schutz gegen mechanische Beschädigungen durch den Gießstrang oder den Kaltstrangkopf, wenn diese eine nicht beabsichtigte Bahn einschlagen sollten, die zur Kollision mit dem Umrührer führen würde.The arrangement according to the invention provides good cooling of the strand and can easily attach the cooling tubes in such a way that no circulating currents occur and the field of the stirrer is thus not shielded. The invention also provides good protection against mechanical damage caused by the casting strand or the cold strand head if these should take an unintended path which would lead to a collision with the stirrer.

Bei einer bevorzugten Ausführungsform werden die Spritzdüsen/-öffnungen in den Rohren versenkt angeordnet, wodurch Beschädigungen der Düsen usw. verhindert werden. Man kann die Rohre auch mit einem Strahlungsschutz aus elektrisch nichtleitendem Material, z. B. Fasern oder Asbest, versehen. Anhand der in den Figuren gezeigten Ausführungsbeispiele soll die Erfindung näher erläutert werden. Es zeigen

  • Figur 1 eine Anordnung gemäß der Erfindung mit einem Umrührer und mit Kühlrohren von der Seite gesehen,
  • Figur 2 eine geschlossene Kühlrohrschlange,
  • Figur 3 ein Ausführungsbeispiel gemäß der Erfindung, bei der die Spritzdüsen in den Kühlrohren versenkt sind,
  • Figur 4 eine alternative Ausführungsform zu dem Ausführungsbeispiel gemäß Figur 3.
In a preferred embodiment, the spray nozzles / orifices are arranged sunk in the pipes, thereby preventing damage to the nozzles, etc. You can also the tubes with radiation protection made of electrically non-conductive material, for. B. fibers or asbestos. The invention will be explained in more detail with reference to the exemplary embodiments shown in the figures. Show it
  • 1 shows an arrangement according to the invention with a stirrer and with cooling tubes from the side,
  • FIG. 2 shows a closed cooling pipe coil,
  • FIG. 3 shows an exemplary embodiment according to the invention, in which the spray nozzles are countersunk in the cooling tubes,
  • FIG. 4 shows an alternative embodiment to the exemplary embodiment according to FIG. 3.

Die Figuren 1 und 2 zeigen einen Umrührer an einem kontinuierlichen Gießstrang zum Umrühren der nicht erstarrten Bereiche des Gießstranges. Statt eines Umrührers können zwei oder mehrere vorhanden sein und diese können in Längsrichrung und/oder Querrichtung des Gießstranges direkt nebeneinander angeordnet sein oder im Zickzack oder auf andere Weise im Verhältnis zum Gießstrang angeordnet sein. Die Umrührer werden mit zwei-, drei- oder mehrphasigem Strom mit einer Frequenz von 50 bis 60 Hz bei sog. Knüppeln (billets), von ca. 25 Hz oder weniger bei sog. Vorblöcken (blooms) und von weniger als 10 Hz bei sog. Brammen (slabs) gespeist, doch können im Rahmen des Erfindungsgedankens natürlich auch andere Frequenzen vorkommen. Der/die Umrührer ist/sind mit 1 in Figur 1 bezeichnet, und der Gießstrang 2 ist schematisch dargestellt. Zwischen dem Umrührer 1 und dem Gießstrang 2 ist ein Rohr 3 angebracht, welches mit mehreren Spritzdüsen 4 oder Spritzöffnungen versehen ist, die auf die nächstliegende Seite des Gießstranges oder auf dessen Kanten gerichtet sind. Über das Rohr 3 wird Kühlwasser zugeführt, mit dem der Strang bespritzt wird, wodurch er eine gewisse Kühlung erfährt. Um das Auftreten zirkulierender Ströme klein zu halten, die eine Abschirmung des Feldes des Umrührers 1 vom Strang verursachen, ist das System so aufgebaut, daß der resultierende Fluß durch geschlossene Leiterbahnen bildende Teile minimal wird. Figur 2 zeigt einen Umrührer 2, der mit zwei Kühlrohren 3' und 3" versehen ist, die zusammen einen außerhalb des Feldes des Umrührers sich schließenden Kreis 5 bilden. Der mit diesem Kreis verkettete resultierende magnetische Fluß ist - wie aus den in Figur 2 eingetragenen Flußrichtungen hervorgeht - Null, so daß in diesem Falle keine nennenswerte Beeinflussung des Feldes des Umrührers stattfindet. Die Rohre 3' und 3" verlaufen parallel zueinander und in Längsrichtung des Rührers, und sie dürfen in dem Bereich unter bzw. vor dem Umrührer keine elektrisch leitende Verbindung miteinander oder mit dem Umrührer haben. Der Umrührer mit dem Kühlrohr besteht vorzugsweise aus unmagnetischem Material mit hohem spezifischem elektrischem Widerstand, beispielsweise aus austenitischem rostfreiem Stahl.Figures 1 and 2 show a stirrer on a continuous casting strand for stirring the non-solidified areas of the casting strand. Instead of a stirrer, two or more can be present and these can be arranged directly next to one another in the longitudinal direction and / or transverse direction of the casting strand, or can be arranged in a zigzag or other manner in relation to the casting strand. The stirrers are operated with two-phase, three-phase or multi-phase current with a frequency of 50 to 60 Hz for so-called billets, of approx. 25 Hz or less for so-called blooms and of less than 10 Hz for so-called billets Slabs are fed, but other frequencies can of course also occur within the scope of the inventive idea. The stirrer (s) is / are designated 1 in FIG. 1, and the casting strand 2 is shown schematically. Between the stirrer 1 and the casting strand 2, a tube 3 is attached, which is provided with a plurality of spray nozzles 4 or spray openings, which are directed towards the nearest side of the casting strand or at the edges thereof. Cooling water is supplied via the pipe 3, with which the strand is sprayed, as a result of which it experiences a certain cooling. In order to minimize the occurrence of circulating currents which cause the field of the stirrer 1 to be shielded from the strand, the system is constructed in such a way that the resulting flow through parts forming closed conductor tracks is minimized. FIG. 2 shows a stirrer 2 which is provided with two cooling tubes 3 'and 3 ", which together form a circle 5 which closes outside the field of the stirrer. The resulting magnetic flux which is linked to this circle is - as shown in FIG. 2 Flow directions emerges - zero, so that in this case there is no appreciable influence on the field of the stirrer. The tubes 3 'and 3 "run parallel to one another and in the longitudinal direction of the stirrer, and they may be in the area under or in front of the stirrer have no electrically conductive connection to one another or to the stirrer. The stirrer with the cooling tube is preferably made of non-magnetic material with high specific electrical resistance, for example austenitic stainless steel.

Es ist bereits bekannt, den Umrührer im Boden mit einer Schiene als Schutz gegen z. B. den Kaltstrangkopf zu versehen, der dem Gießstrang beim kontinuierlichen Gießen vorausgeht. Gemäß der Erfindung werden die Sprühwasserrohre 3' und 3" zwischen dem Umrührer 1 und dem Gießstrang 2 angebracht (siehe Figur 3). Die Spritzdüsen 6 sind hier in den Kühlrohren 3', 3" versenkt. Hierdurch werden Beschädigungen der Rohre vermieden, d. h. man erhält einen Schutz gegen den Kaltstrangkopf. Zwischen den Kühlrohren 3' und 3" und seitlich derselben ist ein Strahlungsschutz 7 aus elektrisch nichtleitendem Material, z. B. aus Fasern, Asbest o.dgl., angebracht. Dieser dient als sehr effektiver Strahlungsschutz am Umrüher und ermöglicht eine Verbindung von Spritz- und Gehäusekühlwasser. Das Spülwasser wird durch die Düsen 6 herausgespritzt, und das Gehäusekühlwasser kommt in den Kühlrohren innerhalb des Umrührers 1 vor (nicht gezeigt).It is already known that the stirrer in the bottom with a rail as protection against z. B. to provide the cold strand head that precedes the casting strand in continuous casting. According to the invention, the spray water pipes 3 'and 3 "are attached between the stirrer 1 and the casting strand 2 (see FIG. 3). The spray nozzles 6 are sunk in the cooling pipes 3', 3" here. This prevents damage to the pipes, i.e. H. protection against the cold strand head is obtained. A radiation protection 7 made of electrically non-conductive material, for example made of fibers, asbestos or the like, is attached between the cooling tubes 3 'and 3 "and laterally. This serves as very effective radiation protection on the stirrer and enables a connection of spray and case cooling water, the rinse water is sprayed out through the nozzles 6, and the case cooling water occurs in the cooling pipes inside the stirrer 1 (not shown).

Um das Auftreten zirkulierender Ströme durch die Spraywasserrohre 3, 3', 3" und den Boden des Umrührers zu vermeiden, können die Sprühwasserrohre z. B. mit Aluminiumoxyd (AI203) überzogen sein. Wichtig ist, daß der Strahlungsschutz 7 auch in feuchtem Zustand nichtleitend bleibt, und seine Aufgabe besteht darin, die Zeitkonstante für die Erwärmung des Umrührers zu erhöhen. Ein Vorteil der Verwendung separater Kühlwasserkreise besteht darin, daß, falls das Sprühwasser ausfallen sollte, immer noch eine Kühlung des Umrührers stattfindet, und umgekehrt.In order to avoid the occurrence of circulating currents through the spray water pipes 3, 3 ', 3 "and the bottom of the stirrer, the spray water pipes can, for example, be coated with aluminum oxide (Al 2 O 3 ). It is important that the radiation protection 7 also in remains non-conductive when wet, and its job is to increase the time constant for heating the stirrer.

Figur 4 zeigt einen Gießstrang 2, der mit Kühlrohren 3 zwischen dem Gießstrang 2 und dem Umrührer 1 versehen ist, die, wie bereits erwähnt, mit versenkten Düsen 6 ausgerüstet sind. Seitlich von diesen Rohren sind weitere Kühlrohre 8 angebracht, die mit Düsen 9 versehen sind, wobei das Kühlwasser direkt auf den Umrührer, genauer, auf die Kanten und Teile der Seitenflächen des Umrührers gerichtet ist. Die anderen Kühlrohre 3 sind ebenfalls mit Düsen 10 zur Bespritzung des Umrührers versehen. Hierdurch wird der Schutz gegen die Wärmestrahlung vom Strang erhöht, und auch bei dieser Ausführungsform ist ein Strahlungsschutz 11 der im Zusammenhang mit Figur 3 beschriebenen Art vorhanden. Man erhält also einen Schutz des Umrührergehäuses gegen Wärmestrahlung vom Strang. Man kühlt den Umrührer auch mittels der Düsen (10), und diese Kühlung des Umrührers setzt dessen induktive und durch seine Verluste bedingte Erwärmung effektiv herab, die außer der Erwärmung durch Strahlung vom Gießstrang stattfindet. Wie bereits erwähnt, besteht das Kühlwassersystem aus zwei Teilen : Erstens einem von dem Umrührer getrennten Rohrsystem zur Sprühkühlung durch die Rohre 3, das so aufgebaut ist, daß zirkulierende Ströme vermieden werden, und zweitens einem System im Umrührer 1 zur üblichen inneren Kühlung des Umrührers. Der Strahlungsschutz 11 kann mit zwei Seitenteilen versehen sein, die als Strahlungsschutz für die Kanten des Umrührers dienen.Figure 4 shows a casting strand 2, which is provided with cooling tubes 3 between the casting strand 2 and the stirrer 1, which, as already mentioned, are equipped with recessed nozzles 6. To the side of these tubes are further cooling tubes 8 which are provided with nozzles 9, the cooling water being directed directly at the stirrer, more precisely at the edges and parts of the side surfaces of the stirrer. The other cooling tubes 3 are also provided with nozzles 10 for spraying the stirrer. This increases protection against heat radiation from the strand, and radiation protection 11 of the type described in connection with FIG. 3 is also present in this embodiment. Protection of the agitator housing against heat radiation from the strand is thus obtained. The stirrer is also cooled by means of the nozzles (10), and this cooling of the stirrer effectively reduces the inductive heating caused by its losses, which heating takes place in addition to the heating by radiation from the casting strand. As already mentioned, the cooling water system consists of two parts: first, a pipe system separate from the stirrer for spray cooling through the pipes 3, which is constructed in such a way that circulating flows are avoided, and secondly, a system in the stirrer 1 for the usual internal cooling of the stirrer. The radiation protection 11 can be provided with two side parts which serve as radiation protection for the edges of the stirrer.

In den Figuren ist gezeigt, wie die Rohre 3' und 3" in Längsrichtung des Rührers verlaufen. Da das Ausführungsbeispiel einen Längsumrührer zeigt, verlaufen die Rohre damit zugleich in Längsrichtung des Stranges. Bei einem Querumrührer würden diese Rohre senkrecht zur Längsrichtung des Stranges verlaufen. Allgemein kann gesagt werden, daß die Richtung der Rohre mit der Fortpflanzungsrichtung des vom Umrührer erzeugten Wanderfeldes übereinstimmt.The figures show how the tubes 3 'and 3 "run in the longitudinal direction of the stirrer. Since the exemplary embodiment shows a longitudinal stirrer, the tubes thus also run in the longitudinal direction of the strand. In the case of a transverse stirrer, these tubes would run perpendicular to the longitudinal direction of the strand. In general it can be said that the direction of the tubes coincides with the direction of propagation of the traveling field generated by the stirrer.

Claims (5)

1. Arrangement for stirring the unsolidified portions of a cast strand in a continuous casting process with at least one electromagnetic stirrer setting up a travelling field and with spray nozzles or spray openings for cooling water, characterized in that tubes (3, 3', 3"), preferably in parallel to one another, equipped with spray nozzles (4) or spray openings (6) for spraying the casting strand (2) are arranged between the stirrer (1) and the cast strand (2) and extend in the travelling direction of the travelling field produced by the stirrer, and that said cooling tubes form at least one closed electrical circuit (3', 3") which closes outside (5) of the area between the stirrer and the cast strand and which is arranged such that the resultant magnetic flux of the stirrer (1) linked with said closed circuit becomes minimal.
2. Arrangement according to Claim 1, characterized in that said spraying nozzles or spraying openings are located in recesses provided in the tubes.
3. Arrangement according to Claim 1 or 2, characterized in that a spray protection device (7, 11) of electrically non-conducting material is arranged above, below or between and possibly adjacent at least two essentially parallel tubes (3).
4. Arrangement according to Claim 3, characterized in that said spray protection device, on the one hand, extends parallel (7) to the adjoining surface of the strand, and, on the other hand, is angled in relation to the afore said surface area to cover corners or edges of the stirrer.
5. Arrangement according to any of the preceding Claims, characterized in that the tubes (3) are also equipped with spray nozzles or spray openings directed towards the stirrer.
EP83710061A 1982-09-14 1983-09-06 Continuous-casting device for stirring non solidified areas of a cast strand Expired EP0106791B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8205237 1982-09-14
SE8205237A SE432893B (en) 1982-09-14 1982-09-14 DEVICE FOR CONTINUOUS CASTING TO MOVE THE NON-LOCKED PARTS OF A CASTING STRING

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EP0106791A1 EP0106791A1 (en) 1984-04-25
EP0106791B1 true EP0106791B1 (en) 1987-07-08

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US (1) US4541472A (en)
EP (1) EP0106791B1 (en)
JP (1) JPS5970446A (en)
DE (1) DE3372328D1 (en)
SE (1) SE432893B (en)

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US4982796A (en) * 1988-10-18 1991-01-08 Arch Development Corp. Electromagnetic confinement for vertical casting or containing molten metal
EP1747033A1 (en) 2004-04-30 2007-01-31 Burrell E. Clawson Apparatus and methods for isolating human body areas for localized cooling

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JPS529412A (en) * 1975-07-14 1977-01-25 Nec Corp Readout nose transaction circuit system
CH631903A5 (en) * 1978-10-25 1982-09-15 Concast Ag DEVICE FOR COOLING A STRAND IN A STEEL CASTING SYSTEM FOR STEEL WITH AN ELECTROMAGNETIC STIRRER.
US4378548A (en) * 1981-03-23 1983-03-29 Magnetics International, Inc. Lifting magnet incorporating cooling means

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EP0106791A1 (en) 1984-04-25
US4541472A (en) 1985-09-17
SE432893B (en) 1984-04-30
JPS5970446A (en) 1984-04-20
SE8205237L (en) 1984-03-15
DE3372328D1 (en) 1987-08-13
SE8205237D0 (en) 1982-09-14

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