EP0906163B1 - Continuous casting plant for billets - Google Patents
Continuous casting plant for billets Download PDFInfo
- Publication number
- EP0906163B1 EP0906163B1 EP97925824A EP97925824A EP0906163B1 EP 0906163 B1 EP0906163 B1 EP 0906163B1 EP 97925824 A EP97925824 A EP 97925824A EP 97925824 A EP97925824 A EP 97925824A EP 0906163 B1 EP0906163 B1 EP 0906163B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- cross
- continuous casting
- melt
- 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.)
- Expired - Lifetime
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 30
- 239000000155 melt Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 14
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 8
- 238000007654 immersion Methods 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011470 perforated brick Substances 0.000 description 2
- 238000010405 reoxidation reaction Methods 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 241001474791 Proboscis Species 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
Definitions
- the invention relates to a continuous caster for billets.
- This continuous caster is particularly suitable for casting steel billets thought.
- Stick systems are usually used with a free-falling nozzle in the distributor Pouring stream poured into the mold. Oil is used here to lubricate the strand Use.
- This document shows that a continuous casting mold of a conventional type a nozzle with a free-falling pouring jet and oil as a lubricant is used.
- From DE-OS 2042897 is a device for casting with pouring tubes on one Continuous caster for steel is known, with at least one outlet opening Pouring tube opens out below a bath level covered with slag, whereby the pouring tube is surrounded by a fire-proof ring to protect against erosion.
- Continuous casting plants for the production of billets and blocks are also made known continuously cast steel products, with dimensions whose Cross-sectional areas of the mold inlets have a size at which normal Dipping spouts can be used.
- the invention has set itself the goal of using simple constructive means Continuous caster for billets with previously free-flowing pouring stream to create reduced the reoxidation of the pouring stream between the distributor and the pouring level
- the surface of the billet improves and the thermal conditions of both the Strand shell as the mold skin is improved.
- the inlet cross section of the mold it is proposed to design the inlet cross section of the mold to be round, oval to polygonal and to carry out the essential deformation of the billet only by the rollers arranged downstream of the mold in the casting direction.
- a dip tube is inserted into this mold inlet, which has the size range for a given cross-sectional area, and protrudes into the melt in such a way that its outer contour is arranged equidistant from the inner surface of the mold. Casting powder is applied to this annular surface of the melt located in the space between the inner wall of the mold and the outer tube of the dip tube.
- the skin temperature of the mold is low and therefore longer Life of the mold.
- a round mold with a Diameter of 102 mm used this cross-sectional area has the same size as the square format of a 80 mm square stick.
- the relatively large diameter of 102 mm makes it possible to use an immersion tube with a uniform distance to the mold wall of 20 mm over the entire circumference of 360 degrees in the mold level. Such a dip tube can be reached desired service life a wall thickness with the necessary for the casting performance Have an inside diameter of 20 mm. Due to this high wall thickness is one To achieve casting time of 8 to 10 hours with sufficient at the same time Casting slag formation in the mold level, which is responsible for the formation of the slag film and thus responsible for the reduced and even heat flow in the mold is.
- the reduction in Reoxidatin of the pouring stream is due to the use of the dip tube and the Casting powder can also be poured into aluminum-cooled steel.
- FIG. 1 shows a perforated brick from the melt supply vessel 10, into which a one-piece dip tube 31 is introduced through a sheet metal jacket 13.
- the mouth of the immersion tube 31 is immersed in a mold 41 filled with melt M.
- the mold 41 has cooling channels 43.
- Deformation elements 71 are provided below the mold, here in the form of pressure rollers (71 to 74), the fourth pressure roller not being shown in the present case. With these at least four deformation elements (the pressure rollers 71 to 74), the strand is formed into a shape with a larger specific surface to the cross section.
- FIG. 2 shows a melt supply vessel 10 with a perforated brick, in which a Inlet pipe 12 is provided, which penetrates a sheet metal jacket 13. At the At the mouth of the inlet pipe 12, an upper holding plate 14 can be attached in a form-fitting manner, which can be connected to a lower holding plate 15 via holding screws.
- the lower holding plate 15 encompasses a collar 32 of a two-part dip tube 35.
- the immersion tube 35 projects into a mold 41 filled with metal M.
- a powder container 57 which is filled with powder P, is provided above the mold 41 through a lock 58 on the surface of the mold 41 located liquid metal M can be supplied.
- the powder is fed to a groove 53, which is a ring gear has, which meshes with a gear 55, which is driven by a motor 56 becomes.
- the groove 53 encompassing the dip tube 30 has a groove 53 in the bottom of the groove arranged trunk 52, which is close to the one floating on the metal M. Powder P protrudes.
- the rotational movement of the motor 56, the influence on the angular position of the trunk 52nd inside the mold and the amount of powder P, which is from the lock drive 59 is caused, is triggered by a measuring and control device 63, which Control lines 64, 65 are connected to the drives 56, 59.
- the measuring and Control device 63 is metrologically via a measuring line 62 with one at the Mold 41 arranged thermocouple 61 connected.
- the strand shell E Due to the contact of the liquid melt M with the inner wall 42 of the mold the strand shell E. between the strand shell E and the mold inner wall 42 is the slag S intended for lubrication.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
Die Erfindung betrifft eine Stranggießanlage für Knüppel.The invention relates to a continuous caster for billets.
Diese Stranggießanlage ist insbesondere zum Vergießen von Knüppeln aus Stahl gedacht.This continuous caster is particularly suitable for casting steel billets thought.
Knüppelanlagen werden üblicherweise über eine Düse im Verteiler mit freifallendem Gießstrahl in die Kokille gegossen. Zur Schmierung des Stranges findet hier Öl Verwendung.Stick systems are usually used with a free-falling nozzle in the distributor Pouring stream poured into the mold. Oil is used here to lubricate the strand Use.
Aus der EP 0 545 510 ist ein Verfahren zur Erzeugung von Walzvormaterial bekannt, bei dem flüssiger Stahl in eine wassergekühlte Stranggießkokille gegossen wird und der Stahl zum Teil unter Bildung einer ringförmigen Strangschale mit einer runden oder ovalen Form der Querschnittsfläche des Stranges erstarrt, wobei der so in der Kokille erzeugte Strang unterhalb der Kokille durch Stützmittel in seiner Querschnittsfläche reduziert wird.From EP 0 545 510 a method for producing rolled raw material is known, where the liquid steel is poured into a water-cooled continuous casting mold and the steel partly with the formation of an annular strand shell with a round or oval shape of the cross-sectional area of the strand solidifies, the so in the mold produced strand below the mold by proppant in its cross-sectional area is reduced.
Dieser Schrift ist zu entnehmen, daß eine Stranggießkokille herkömmlicher Bauart eingesetzt wird, also eine Düse mit freifallendem Gießstrahl und Öl als Schmiermittel.This document shows that a continuous casting mold of a conventional type a nozzle with a free-falling pouring jet and oil as a lubricant is used.
Aus der DE 43 19 966 A1 ist es bekannt, dem Tauchausguß eine Form zu geben, dessen Aussenkanten äquidistant zur Innenfläche der Kokille ausgestaltet ist.From DE 43 19 966 A1 it is known to give the immersion spout a shape whose outer edges are designed equidistant from the inner surface of the mold.
Aus DE-OS 2042897 ist eine Vorrichtung zum Gießen mit Gießrohren auf einer Stranggießanlage für Stahl bekannt, wobei mindestens eine Austrittsöffnung eines Gießrohres unterhalb eines mit Schlacke abgedeckten Badspiegels ausmündet, wobei das Gießrohr zum Schutz gegen Erosion von einem feuerfesten Ring umgeben ist.From DE-OS 2042897 is a device for casting with pouring tubes on one Continuous caster for steel is known, with at least one outlet opening Pouring tube opens out below a bath level covered with slag, whereby the pouring tube is surrounded by a fire-proof ring to protect against erosion.
Die Abmessungen der angegebenen Beispiele, insbesondere die Anordnung der Austrittsöffnung des Tauchrohres sind ein Hinweis darauf, daß es sich um eine Kokille für eine Brammenstranggießanlage für Stahl handelt.The dimensions of the examples given, in particular the arrangement of the Outlet opening of the dip tube are an indication that it is a mold for a slab caster for steel.
Weiterhin sind Stranggießanlagen zum Herstellen von Knüppel und Blöcken aus stranggegossenen Stahlerzeugnissen bekannt, mit Abmessungen, deren Querschnittsflächen der Kokilleneintritte eine Größe aufweisen, bei denen normale Tauchausgüsse einsetzbar sind.Continuous casting plants for the production of billets and blocks are also made known continuously cast steel products, with dimensions whose Cross-sectional areas of the mold inlets have a size at which normal Dipping spouts can be used.
Sowohl aus der WO 92/00819 wie auch der EP A 0389 918 sind Vorrichtunen bekannt, mit denen Gießpulver auf die Badoberfläche einer Schmelze aufbringbar sind.Devices are known both from WO 92/00819 and from EP A 0389 918, with which casting powder can be applied to the bath surface of a melt.
Die Erfindung hat sich das Ziel gesetzt, mit einfachen konstruktiven Mitteln eine Stranggießanlage für Knüppel mit bisher freifallendem Gießstrahl zu schaffen, bei der die Reoxidation des Gießstrahles zwischen Verteiler und Gießspiegel gemindert, die Oberfläche der Knüppel verbessert und die thermischen Verhältnisse sowohl der Strangschale wie der Kokillenhaut verbessert wird.The invention has set itself the goal of using simple constructive means Continuous caster for billets with previously free-flowing pouring stream to create reduced the reoxidation of the pouring stream between the distributor and the pouring level The surface of the billet improves and the thermal conditions of both the Strand shell as the mold skin is improved.
Die Erfindung erreicht dieses Ziel durch die kennzeichnenden Merkmale des Anspruchs 1. Die Unteransprüche zeigen vorteilhafte Ausgestaltungen der Erfindung.The invention achieves this goal by the characterizing features of Claim 1. The subclaims show advantageous embodiments of the invention.
Erfindungsgemäß wird vorgeschlagen, den Eintrittsquerschnitt der Kokille rund, oval
bis polygonal auszugestalten und die wesentliche Verformung des Knüppels erst durch
die der Kokille in Gießrichtung nachgeordneten Rollen durchzuführen. Betroffen sind
hier Knüppelanlagen mit einem Quadratformat kleiner 160 mm, vorzugsweise unter
100 mm.
Werden bei diesen im wesentlichen quadratischen Formaten beispielsweise
Rundkokillen eingesetzt, so wird eine Querschnitts- und Durchmesservergrößerung
von 127 % erreicht. In diese bei vorgegebener Querschnittsfläche den Größenumfang
aufweisenden Kokilleneintritt wird ein Tauchrohr eingesetzt, das in die Schmelze
hineinragt in der Weise, daß dessen Außenkontur äquidistant zur Innenfläche der
Kokille angeordnet ist. Auf diese in dem Freiraum zwischen Kokilleninnenwand und
Tauchrohraußenmantel befindliche Ringfläche der Schmelze wird Gießpulver
aufgebracht.According to the invention, it is proposed to design the inlet cross section of the mold to be round, oval to polygonal and to carry out the essential deformation of the billet only by the rollers arranged downstream of the mold in the casting direction. This affects billet systems with a square format smaller than 160 mm, preferably less than 100 mm.
If, for example, round molds are used in these essentially square formats, an increase in cross-section and diameter of 127% is achieved. A dip tube is inserted into this mold inlet, which has the size range for a given cross-sectional area, and protrudes into the melt in such a way that its outer contour is arranged equidistant from the inner surface of the mold. Casting powder is applied to this annular surface of the melt located in the space between the inner wall of the mold and the outer tube of the dip tube.
Das Gießen mit einem Tauchausguß und Gießpulver bei Knüppelanlagen führt neben der Verminderung der Reoxidation des Gießstrahls zwischen Verteiler und Gießspiegel durch den Gießschlackefilm zwischen Strangschale und Kokillenwand zu einem Vergleichmäßigen und stark reduzierten Wärmeübergang. Diese sanfte Kühlung führt zu einer Strangschalenbildung, mit folgenden Vorteilen:
- Die Strangschale nimmt weniger Spannungen auf, die durch starke Temperaturgradienten hervorgerufen werden.
- Die heißere Strangschale schmiegt sich besonders gut an die Kokilleninnenwandung an.
- Die Strangschale selber kann bessere Dehnungen aufnehmen ohne zu reißen.
- Der Schrumpf und damit die Strangschalenbelastung ist wesentlich geringer.
- The strand shell absorbs less stresses that are caused by strong temperature gradients.
- The hotter strand shell nestles particularly well against the mold inner wall.
- The strand shell itself can absorb better strains without tearing.
- The shrinkage and thus the strand shell load is significantly lower.
Desweiteren stellt sich eine geringe Hauttemperatur der Kokille und damit eine längere Lebensdauer der Kokille ein. Wird beispielsweise eine Rundkokille mit einem Durchmesser von 102 mm eingesetzt, so besitzt diese Querschnittsfläche den gleichen Umfang wie das Quadratformat eines Knüppels von Quadrat 80 mm.Furthermore, the skin temperature of the mold is low and therefore longer Life of the mold. For example, a round mold with a Diameter of 102 mm used, this cross-sectional area has the same size as the square format of a 80 mm square stick.
Durch den relativ großen Durchmesser von 102 mm wird es möglich, ein Tauchrohr mit gleichförmigen Abstand zur Kokillenwand von 20 mm über den gesamten Umfang von 360 Grad im Gießspiegel einzusetzen. Ein solches Tauchrohr kann zum Erreichen gewünschter Standzeiten eine Wandstärke mit für die Gießleistung erforderlichem Innendurchmesser von 20 mm aufweisen. Durch diese hohe Wandstärke ist eine Gießzeit von 8 bis 10 Std. zu erreichen bei gleichzeitig ausreichender Gießschlackenbildung im Gießspiegel, die für die Ausbildung des Schlackenfilms und damit den gesenkten und vergleichmäßigen Wärmestrom in der Kokille verantwortlich ist.The relatively large diameter of 102 mm makes it possible to use an immersion tube with a uniform distance to the mold wall of 20 mm over the entire circumference of 360 degrees in the mold level. Such a dip tube can be reached desired service life a wall thickness with the necessary for the casting performance Have an inside diameter of 20 mm. Due to this high wall thickness is one To achieve casting time of 8 to 10 hours with sufficient at the same time Casting slag formation in the mold level, which is responsible for the formation of the slag film and thus responsible for the reduced and even heat flow in the mold is.
Bei einer möglichen konstanten Gießgeschwindigkeit von z. B. 3 m/min. ist eine Gießschlackenversorgung sichergestellt. Diese steigt sogar mit größer werdender Strangdicke und gleicher Gießgeschwindigkeit an, bedingt durch den größer werdenden Abstand zwischen Tauchrohr und Kokillenwand.With a possible constant casting speed of z. B. 3 m / min. is a Cast slag supply ensured. This increases even with increasing Strand thickness and the same casting speed, due to the larger distance between dip tube and mold wall.
Die Gießwalztechnik eines Rundformates in der Kokille auf ein äquivalentes Quadratformat unterhalb der Kokille führt zu einer Querschnittsverkleinerung von ca. 21 % und damit gleichzeitig zu einer Veränderung der Stranginnenqualität hinsichtlich der:
- Verminderung von Makroseigerung
- Verringerung der Kristall- und damit der Korngröße
- Förderung der globularen Erstarrung bis in den Kem
- Verminderung bis Verhinderung der Kernporösität
- Reduction of Macro Boost
- Reduction of the crystal and thus the grain size
- Promotion of global solidification down to the core
- Reduction to prevention of core porosity
Das Rundformat erlaubt, bedingt durch die feinere und gleichförmigere Führung in der Kokille ein Gießen mit hoher Sicherheit, auch bei hoher Gießgeschwindigkeit bis zu 12 m/min, mit den Folgen:
- Verringerung der Durchbruchsrate
- Bei gleichzeitiger Steigerung der Gießgeschwindigkeit
- Reduction in breakthrough rates
- While increasing the casting speed
Durch den Einsatz eines Tauchrohres wird der Einsatz einer Verteilerverschlußregelung durch Stopfen oder Schieber möglich. Statt des bei Knüppelanlagen üblichen abzugsgeregelten Stranggießens wird hierdurch die Nichtkonstanz der Gießgeschwindigkeit, die sonst bedingt wird durch die Veränderung der Verteilerdüse während des Gießens, z.B. durch Verstopfung oder Erosion der Düsenöffnung mit den Folgen der nicht gewollten Verringerung bzw. Erhöhung der Gießgeschwindigkeit, vermieden.By using a dip tube, the use of a Distribution lock regulation possible by plug or slide. Instead of at Stick systems usual deduction-controlled continuous casting is thereby Inconsistency of the casting speed, which is otherwise caused by the change the distributor nozzle during casting, e.g. due to constipation or erosion of the Nozzle opening with the consequences of the unwanted reduction or increase in Pouring speed, avoided.
Durch den Einsatz der Verteilerverschlußregelung und den Einsatz von Gießpulver wird die Gießleistung, die Gießzeit, die Innenqualität und vor allem die Oberflächenqualität positiv beeinflußt. So neigen die nach der vorgeschlagenen Stranggießanlage gegossenen Knüppel weniger zu Innenrissen, aber auch nicht zu Oberflächenrissen, vorzugsweise Längsrissen und zu Depressionen wie auch zu Strangschalenverwerfungen, z. B. Spießkant. By using the distributor lock control and the use of casting powder the casting performance, the casting time, the internal quality and above all the Surface quality positively influenced. So those tend to be suggested Continuous casting machine cast billets less to internal cracks, but not too Surface cracks, preferably longitudinal cracks and depression as well Strand shell faults, e.g. B. Spike edge.
Neben den aufgeführten Vorteilen kann, bedingt durch die Verminderung der Reoxidatin des Gießstrahles begründet durch den Einsatz des Tauchrohres und des Gießpulvers auch aluminiumberuhigter Stahl gegossen werden.In addition to the advantages listed, the reduction in Reoxidatin of the pouring stream is due to the use of the dip tube and the Casting powder can also be poured into aluminum-cooled steel.
Ein Beispiel der Erfindung ist in der beigefügten Zeichnung dargelegt. Dabei zeigen die
- Figur 1
- Eine Kokille mit einem einteiligen Tauchausguß
- Figur 2
- Eine Kokille mit einem zweiteiligen Tauchausguß und einer Pulverzufuhreinrichtung
- Figure 1
- A mold with a one-piece immersion nozzle
- Figure 2
- A mold with a two-part immersion nozzle and a powder feed device
Die Figur 1 zeigt vom Schmelzenzufuhrgefäß 10 einen Lochstein, in den durch einen
Blechmantel 13 ein einteiliges Tauchrohr 31 eingebracht ist. Die Mündung des
Tauchrohres 31 taucht in eine mit Schmelze M gefüllte Kokille 41. Zwischen dem
Tauchrohraußenmantel 33 und dem Kokillenmantel 42 ist die Schmelzenoberfläche
ringförmig ausgebildet.
Die Kokille 41 besitzt Kühlkanäle 43.
Unterhalb der Kokille sind Verformungselemente 71 vorgesehen, hier in Form von
Andrückrollen (71 bis 74), wobei im vorliegenden Fall die vierte Andrückrolle nicht
dargestellt ist. Mit diesen mindestens vier Verformungselementen (den Andrückrollen
71 bis 74) wird der Strang auf eine Form mit größerer spezifischer Oberfläche zum
Querschnitt umgeformt.FIG. 1 shows a perforated brick from the
The
Die Figur 2 zeigt ein Schmelzenzufuhrgefäß 10 mit einem Lochstein, in dem ein
Einlaufrohr 12 vorgesehen ist, welches ein Blechmantel 13 durchdringt. An der
Mündung des Einlaufrohres 12 ist eine obere Halteplatte 14 formschlüssig anbringbar,
die über Halteschrauben mit einer unteren Halteplatte 15 verbindbar ist.FIG. 2 shows a
Die untere Halteplatte 15 umgreift einen Kragen 32 eines zweiteiligen Tauchrohres 35.The
Das Tauchrohr 35 ragt in eine mit Metall M gefüllten Kokille 41.The
In der vorliegenden Figur 2 ist der Eintritt des Einlaufrohres 12 durch einen
Stopfenverschluß 21 verschließbar. In the present Figure 2, the entry of the
Oberhalb der Kokille 41 ist ein Pulverbehälter 57 vorgesehen, der mit Pulver P gefüllt
ist, welches durch eine Schleuse 58 auf die Oberfläche des sich in der Kokille 41
befindenden Flüssigmetalls M zuführbar ist.A
Im vorliegenden Fall wird das Pulver einer Rinne 53 zugeführt, die ein Zahnkranz
aufweist, der mit einem Zahnrad 55 kämmt, welches über einen Motor 56 angetrieben
wird. Die das Tauchrohr30 umgreifende Rinne 53 besitzt einen im Boden der Rinne 53
angeordneten Rüssel 52, der bis dicht über das auf dem Metall M schwimmende
Pulver P ragt.In the present case, the powder is fed to a
Die Drehbewegung des Motors 56, die Einfluß auf die Winkelstellung des Rüssels 52
innerhalb der Kokille nimmt und die Pulvermenge P, die von dem Schleusenantrieb 59
bewirkt wird, wird von einer Meß- und Regeleinrichtung 63 ausgelöst, die über
Steuerleitungen 64, 65 mit den Antrieben 56, 59 verbunden sind. Die Meß- und
Regeleinrichtung 63 ist meßtechnisch über eine Meßleitung 62 mit einem an der
Kokille 41 angeordneten Thermoelement 61 verbunden.The rotational movement of the
Durch den Kontakt der flüssigen Schmelze M mit der Innenwand 42 der Kokille bildet
sich die Strangschale E. Zwischen der Strangschale E und der Kokilleninnenwandung
42 befindet sich die zur Schmierung vorgesehene Schlacke S. Due to the contact of the liquid melt M with the
- 1111
- LochsteinPerforated stone
- 1212th
- EinlaufrohrInlet pipe
- 1313
- BlechmantelSheet metal jacket
- 1414
- Obere HalteplatteUpper holding plate
- 1515
- Untere HalteplatteLower holding plate
- 1616
- HalteschraubenRetaining screws
- 2121
- StopfenverschlußPlug closure
- 3131
- einteiliges Tauchrohrone-piece dip tube
- 3232
- Kragencollar
- 3333
- Tauchrohr AußenmantelImmersion tube outer jacket
- 3434
- AußenkanteOuter edge
- 3535
- zweiteiliges Tauchrohrtwo-part dip tube
- 4141
- KokilleMold
- 4242
- KokilleninnenmantelMold inner jacket
- 4343
- KühlkanäleCooling channels
- 5151
- ZufuhrrohrFeed pipe
- 5252
- RüsselProboscis
- 5353
- RinneGutter
- 5454
- ZahnkranzSprocket
- 5555
- Zahnradgear
- 5656
- Motorengine
- 5757
- PulverbehälterPowder container
- 5858
- Schleuselock
- 5959
- SchleusenantriebLock drive
- 6161
- ThermoelementThermocouple
- 6262
- MeßleitungMeasurement line
- 6363
- Meß- und RegeleinrichtungMeasuring and control device
- 6464
-
Steuerleitung 59
Control line 59 - 6565
-
Steuerleitung 56
Control line 56
- 71 bis 7471 to 74
- Verformungselemente / AndrückrollenDeformation elements / pressure rollers
- aa
- Kantenlänge des quadratischen KnüppelsEdge length of the square billet
- bb
- Distanzdistance
- EE
- SchaleBowl
- ss
- Schlackeslag
- MM
- Schmelzemelt
- PP
- Pulverpowder
Claims (8)
- Continuous casting installation for billets, having a melt supply vessel from which the melt is supplied to a mould, which is disposed in a stationary manner, and rollers which are disposed after the mould in the casting direction, which rollers reduce the billet in its cross-sectional area until its solidification by support means which have a deforming effect on the billet in such a manner that, while maintaining its circumferential length, the billet is deformed into a polygonal cross-sectional configuration with a minimum of four corners,the cross-sectional area having a polygonal, oval to circular contour at least in the entry region of the mould (41),the circumference of this cross-sectional area being smaller than 640 mm, corresponding to a square format of a billet with an edge length a < 160 mm, a submerged tube (31 or 35), which is connected to the melt supply vessel (10), protruding into the mould (41), the external edges (34) of which submerged tube are configured to be equidistant from the internal surface of the mould (41), and supply elements (51, 52) being provided, by means of which casting powder (B) can be deposited on the ring surface of the melt (M), which is located between a mould internal casing (42) and a submerged tube external casing (33) of the submerged tube (31 or 35).
- Continuous casting installation according to claim 1,
characterised in that
the cross-sectional area of the submerged tube (31 or 35) and the internal surface of the mould (41) have a dimension with which casting rates of up to 12 m/min are achieved. - Continuous casting installation according to one of the preceding claims,
characterised in that
the external diameter of the submerged tube (33 or 35) is chosen such that the distance of the mould internal casing (42) from the submerged tube external casing (33) is b = 0.25 - 0.4 x a, with a = the edge length of the solidified billet in mm. - Continuous casting installation according to one of the previously mentioned claims,
characterised in that
the submerged tube (31 or 35) is closable by a closure element (21), for example a stopper or a slide. - Continuous casting installation according to claim 1,
characterised in that
at least one blow pipe (52), which is disposed on a casting gutter (53), is provided as supply elements, which blow pipe can be guided with the casting gutter, moveably in a circle, to any position above the ring surface of the melt (M) located in the mould (41). - Continuous casting installation according to claim 5,
characterised in that
a motor (56) is provided in order to move the casting gutter (53), which motor communicates with thermoelements (61) in order to detect the surface temperature of the billet shell (E). - Continuous casting installation according to one of the claims 1 to 6,
characterised in that
at least four deforming elements, for example pressure rollers (71), are provided in the casting direction after the mould, which pressure rollers are disposed in such a manner relative to each other that the billet is formed into a configuration with a greater specific surface for the cross-section. - Continuous casting installation according to one of the preceding claims for casting steel.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19620306 | 1996-05-10 | ||
| DE19620306 | 1996-05-10 | ||
| DE19633620 | 1996-08-12 | ||
| DE19633620A DE19633620C2 (en) | 1996-05-10 | 1996-08-12 | Continuous caster for billets |
| PCT/DE1997/000818 WO1997043065A1 (en) | 1996-05-10 | 1997-04-21 | Continuous casting plant for billets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0906163A1 EP0906163A1 (en) | 1999-04-07 |
| EP0906163B1 true EP0906163B1 (en) | 2001-12-12 |
Family
ID=26025864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97925824A Expired - Lifetime EP0906163B1 (en) | 1996-05-10 | 1997-04-21 | Continuous casting plant for billets |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0906163B1 (en) |
| CN (1) | CN1074955C (en) |
| AT (1) | ATE210520T1 (en) |
| AU (1) | AU3087497A (en) |
| WO (1) | WO1997043065A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325103B (en) * | 2014-11-25 | 2016-08-24 | 山东钢铁股份有限公司 | The molding casting method of steel band fed by a kind of crystallizer |
| CN105328149B (en) * | 2015-10-29 | 2017-10-03 | 芜湖新兴铸管有限责任公司 | Covering slag automatic feeding device |
| CN105665665B (en) * | 2016-02-29 | 2017-11-07 | 沈阳有色金属加工有限公司 | The vertical semicontinuous red ingot casting C18000 alloying technologys of undercurrent |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60115351A (en) * | 1983-11-25 | 1985-06-21 | Daido Steel Co Ltd | Continuous casting method |
| BE1003055A4 (en) * | 1989-03-30 | 1991-11-05 | Amc N V | APPARATUS FOR THE SAME SPREAD OF COVERING MATERIAL. |
| DE4022117A1 (en) * | 1990-07-11 | 1992-01-16 | Intocast Gmbh | METHOD AND DEVICE FOR THE CONTINUOUS ADMINISTRATION OF POURING AUXILIARIES ON THE MIRROR OF A MELT IN A CONTINUOUS MOLD |
| DE4139242C3 (en) * | 1991-11-26 | 1999-08-19 | Mannesmann Ag | Process for the production of long steel products |
-
1997
- 1997-04-21 AT AT97925824T patent/ATE210520T1/en not_active IP Right Cessation
- 1997-04-21 CN CN97194469A patent/CN1074955C/en not_active Expired - Fee Related
- 1997-04-21 EP EP97925824A patent/EP0906163B1/en not_active Expired - Lifetime
- 1997-04-21 WO PCT/DE1997/000818 patent/WO1997043065A1/en not_active Application Discontinuation
- 1997-04-21 AU AU30874/97A patent/AU3087497A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0906163A1 (en) | 1999-04-07 |
| CN1229374A (en) | 1999-09-22 |
| ATE210520T1 (en) | 2001-12-15 |
| AU3087497A (en) | 1997-12-05 |
| WO1997043065A1 (en) | 1997-11-20 |
| CN1074955C (en) | 2001-11-21 |
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