EP0964760B1 - Method and device for casting thin billets - Google Patents
Method and device for casting thin billets Download PDFInfo
- Publication number
- EP0964760B1 EP0964760B1 EP98910629A EP98910629A EP0964760B1 EP 0964760 B1 EP0964760 B1 EP 0964760B1 EP 98910629 A EP98910629 A EP 98910629A EP 98910629 A EP98910629 A EP 98910629A EP 0964760 B1 EP0964760 B1 EP 0964760B1
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- Prior art keywords
- liquid metal
- channel
- speed
- metallurgical vessel
- casting
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- 238000005266 casting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract 3
- 239000002184 metal Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000000155 melt Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
Definitions
- the invention relates to a method for casting thin strands, in particular made of steel, with a band casting device, in which from a metallurgical vessel liquid metal is fed via a feed device to an endless belt and a appropriate tape pouring device.
- DE 40 39 959 C1 describes a method and a device for producing a Known near-dimensional metal strip, the liquid metal of the metallurgical vessel is placed in a receptacle on which one in two length sections divided feeder is connected.
- the feeding device is the liquid thread before hitting the endless belt a resistance opposed to its flow rate as far reduces the speed of the tape Speed occurs on the endless belt.
- the invention has set itself the goal of a method with a corresponding device to create thin strands with simple constructive Medium and safe process control an endless belt closely tolerated in the desired Belt thickness can be produced.
- the invention achieves this goal by the characterizing features of Process claim 1 and device claim 6.
- the supply quantity of the liquid metal is kept constant in relation to the discharge quantity of the finished product, that is to say the cast strip drawn off from the endless belt system.
- the flow rate of the liquid thread is reduced to such an extent that it occurs on the endless belt at a speed corresponding to the belt take-off speed and the melt in the area of impact has a thickness adapted to the desired strand thickness.
- Measuring elements for recording the level are used to ensure exact compliance with the level provided, e.g. Float or a pearl device, and to comply with the Strip thickness e.g. Distance sensors, which are connected to a measuring and control device Act actuator that controls shut-off elements to regulate the inflow amount.
- This Shut-off elements can be sliders or a stopper.
- the pouring channel in the Designed in such a way that the first pouring channel part forms a resistance channel part.
- the second pouring channel part is formed in its mouth so that it is the same Cross-sectional area, like the later finished product.
- the pouring channel has a shape in which the first as a resistance channel trained channel part is longer than the second channel part.
- Resistor element is provided, which is designed as a filter and a Free space from 0.6 to 0.8 times the cross-sectional area of the pouring channel.
- the free The surface of this filter can be placed outside in a refractory plate Hole exist.
- the melt is heated in the area of the feed device.
- This will proposed the wall of the pouring channel made of electrically conductive refractory material to build and use an induction coil as a heating device.
- the static magnetic field slows down the speed of the melt.
- a linear motor is provided, which by generating a counter the flow direction of the melt migrating field the speed of the Slows down the melt.
- the first pouring channel part is designed as a tube.
- This tube can point in the bottom of the receptacle in a vertical direction be arranged.
- the mouth of this pouring pipe is at this Embodiment connected to a second part of the pouring channel, which as an opening Funnel is designed, wherein its mouth has dimensions that the Finished product.
- the second part of the channel can be used to achieve a uniform outflow speed across the strand width of cross-sectional areas have, which are smaller in the flow direction of the melt in the pouring channel part.
- FIGS. 1 and 3 have a metallurgical vessel 21 filled with liquid metal M. which have a bottom opening 22 in the bottom. At this bottom opening 22 is a diving spout 23 is arranged, which is immersed in a melt M, which is in a receptacle 12 is located.
- the bottom opening 22 of the metallurgical vessel 21 is shown in FIG Slider 25 and in Figure 3 can be closed by a stopper (movement arrow).
- Activation via an actuator 73 is from the metallurgical vessel 21 outflowing amount of liquid metal M continuously adjustable.
- the level of the liquid metal M located in the receptacle 12 becomes detected by a level measuring element 71, in Figure 1 by a float 74 and in Figure 3 by a bead device 75.
- the actuator 73 and the Level measuring device 71 are connected to a measuring and control device 72.
- an endless belt 31 is provided below the receptacle 12, which one driven deflection 32 and a loose deflection 33.
- the liquid metal is given up where it is solidifies and is transported away as finished product S.
- the feed device 11 is designed as a pouring channel, the first Pouring channel part 14, which is designed as a resistance channel part. At this The first pouring channel part 14 is followed by a second pouring channel part 15, which one Has outlet opening 16.
- the thickness d w of the resistance channel part is smaller than the strand thickness d s .
- the resistance channel part has a length L 14 that is greater than the length of the second channel part L 15 .
- a resistance element can be provided in the first pouring channel part, as shown in FIG. 2. It can be constructed as a separate resistance element with a rectangular opening (upper part of the picture) or also as a filter 42 which has bores 43 (lower half of the picture).
- the free area A F is composed of the sum of the bores 43 and has a size of 0.6 to 0.8 x A K (cross-sectional area of the pouring channel).
- the first pouring channel part 14 is tubular, which one second pouring channel part 15 of the feed device 11 connects.
- the second part of the pouring channel is equipped as an opening funnel that leads to the upper run 34 of the Endless belt 31 is inclined.
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Gießen von dünnen Strängen, insbesondere aus Stahl, mit einer Bandgießeinrichtung, bei der aus einem metallurgischen Gefäß flüssiges Metall über eine Zuführeinrichtung einem Endlosband zugeführt wird und eine entsprechende Bandgießeinrichtung dazu.The invention relates to a method for casting thin strands, in particular made of steel, with a band casting device, in which from a metallurgical vessel liquid metal is fed via a feed device to an endless belt and a appropriate tape pouring device.
Aus Scholz,R.u.a. Theoretical modelling of an isokinetical steel feeding system. in Steel
Research 64,1993,No.6,Seiten 300-306 sind verschiedene Untersuchungen über das
Bandgießen bekannt.
Beim Herstellen von Bändern nach dem Bandgießverfahren mit einseitig gekühlter
Bandoberfläche treten Schwierigkeiten auf, diese Bänder in engen Dickentoleranzen
herzustellen.Various studies on strip casting are known from Scholz, Rua Theoretical modeling of an isokinetical steel feeding system. In Steel Research 64, 1993, No.6, pages 300-306.
When producing tapes using the tape casting process with a one-sided cooled tape surface, difficulties arise in producing these tapes in narrow thickness tolerances.
Nach DE 35 21 778 C2 ist es bekannt, Metallstränge in Form von Bändern herzustellen, bei dem schmelzflüssiges Metall aus einer Düse auf die Kühlfläche mit von einem an der Düse mit engem Spalt vorbeibewegten Kühlkörper aufgebracht wird. Zum Herstellen von Bändem ist hier die Düse als Schlitzdüse ausgebildet. Die auslaufseitige Düsenlippe ist dabei in ihrem Abstand von der Kühlfläche des Kühlkörpers einstellbar. Die Weite der Düse (lichter Abstand) der stranganfang- und strangauslaufseitigen Düsenlippe ist in einem der Länge der kaltförmigen Erstarrungsfront des zu gießenden Bandes entsprechenden Abstand angeordnet.According to DE 35 21 778 C2 it is known to use metal strands in the form of strips produce, using the molten metal from a nozzle on the cooling surface is applied by a heat sink moving past the nozzle with a narrow gap. To produce tapes, the nozzle is designed as a slot nozzle. The outlet-side nozzle lip is in its distance from the cooling surface of the Adjustable heat sink. The width of the nozzle (clear distance) of the beginning of the strand and extrusion-side nozzle lip is one of the length of the cold-shaped Solidification front of the strip to be cast corresponding distance.
Nach diesem Verfahren bzw. dieser Vorrichtung hergestellte Bändern haben keine befriedigende Ergebnisse gebracht.Tapes made by this method or device have none brought satisfactory results.
Aus der DE 40 39 959 C1 ist ein Verfahren und eine Vorrichtung zur Herstellung eines endabmessungsnahen Metallbandes bekannt, wobei hierbei das flüssige Metall von dem metallurgischen Gefäß in einen Aufnahmebehälter gegeben wird, an dem eine in zwei Längenabschnitte geteilte Zuführeinrichtung angeschlossen ist. In der Zuführeinrichtung wird dem Flüssigkeitsfaden vor dem Auftreffen auf das Endlosband ein Widerstand entgegengesetzt, der dessen Strömungsgeschwindigkeit soweit mindert, dass sie mit einer der Bandabzugsgeschwindigkeit entsprechenden Geschwindigkeit auf das Endlosband auftritt.DE 40 39 959 C1 describes a method and a device for producing a Known near-dimensional metal strip, the liquid metal of the metallurgical vessel is placed in a receptacle on which one in two length sections divided feeder is connected. In the The feeding device is the liquid thread before hitting the endless belt a resistance opposed to its flow rate as far reduces the speed of the tape Speed occurs on the endless belt.
Die Erfindung hat sich das Ziel gesetzt, ein Verfahren mit entsprechender Vorrichtung zum Gießen von dünnen Strängen zu schaffen, bei dem mit einfachen konstruktiven Mitteln und sicherer Prozeßführung ein Endlosband eng toleriert in gewünschter Banddicke herstellbar ist.The invention has set itself the goal of a method with a corresponding device to create thin strands with simple constructive Medium and safe process control an endless belt closely tolerated in the desired Belt thickness can be produced.
Die Erfindung erreicht dieses Ziel durch die kennzeichnenden Merkmale des Verfahrensanspruches 1 und des Vorrichtungsanspruchs 6.The invention achieves this goal by the characterizing features of Process claim 1 and device claim 6.
Erfindungsgemäß wird die Zufuhrmenge des flüssigen Metalls im Bezug auf die Abflußmenge des Fertigproduktes, also des von der Endlosbandanlage abgezogenen gegossenen Bandes konstant gehalten. Vor dem Auftreffen des flüssigen Metalls auf das Endlosband wird die Strömungsgeschwindigkeit des Flüssigkeitsfadens so weit gemindert, dass sie mit einer der Bandabzugsgeschwindigkeit entsprechenden Geschwindigkeit auf das Endlosband auftritt und die Schmelze im Auftreffbereich einer der gewünschten Strangdicke angepaßte Dicke aufweist. Der Pegel des Flüssigmetalls in dem der Zufuhreinrichtung vorgeschalteten metallurgischen Gefäß wird dabei auf einer Weise eingestellt, daß die geodätische Höhe sich verhält wie P < 10 x ds mit P=Pegel und ds=Strangdicke. Als Leitgröße kann hierbei sowohl der Pegel P wie auch die Strangdicke ds verwendet werden.According to the invention, the supply quantity of the liquid metal is kept constant in relation to the discharge quantity of the finished product, that is to say the cast strip drawn off from the endless belt system. Before the liquid metal hits the endless belt, the flow rate of the liquid thread is reduced to such an extent that it occurs on the endless belt at a speed corresponding to the belt take-off speed and the melt in the area of impact has a thickness adapted to the desired strand thickness. The level of the liquid metal in the metallurgical vessel upstream of the feed device is adjusted in such a way that the geodetic height behaves like P <10 xd s with P = level and d s = strand thickness. Both the level P and the strand thickness d s can be used as a guide variable.
Zur exakten Einhaltung der Pegelhöhe sind Meßelemente zur Erfassung des Pegels vorgesehen, z.B. Schwimmer oder eine Perleinrichtung, und zur Einhaltung der Banddicke z.B. Distanzfühler, welche über eine Meß- und Regeleinrichtung auf einen Aktüator wirken, der Absperrelemente zur Regelung der Zuflußmenge steuert. Diese Absperrelemente können Schieber oder auch ein Stopfen sein.Measuring elements for recording the level are used to ensure exact compliance with the level provided, e.g. Float or a pearl device, and to comply with the Strip thickness e.g. Distance sensors, which are connected to a measuring and control device Act actuator that controls shut-off elements to regulate the inflow amount. This Shut-off elements can be sliders or a stopper.
Um die Geschwindigkeit der Schmelze sicher einzustellen, wird der Gießkanal in der Weise ausgestaltet, daß der erste Gießkanalteil einen Widerstandskanalteil bildet. Der zweite Gießkanalteil ist in seiner Mündung so ausgebildet, daß er die gleiche Querschnittsfläche besitzt, wie das spätere Fertigprodukt. In order to set the speed of the melt safely, the pouring channel in the Designed in such a way that the first pouring channel part forms a resistance channel part. The second pouring channel part is formed in its mouth so that it is the same Cross-sectional area, like the later finished product.
In einer vorteilhaften Ausgestaltung ist der Widerstandskanalteil als Drossel ausgebildet, er weist dabei eine Dicke auf, die kleiner als die spätere Strangdicke ist, entsprechend dw = 0,5 bis 0,8 x ds, mit dw=Dicke des Widerstandskanalteils und ds=Strangdicke.In an advantageous embodiment, the resistance channel part is designed as a throttle, it has a thickness which is smaller than the subsequent strand thickness, corresponding to d w = 0.5 to 0.8 xd s , with d w = thickness of the resistance channel part and d s = strand thickness.
Weiterhin besitzt der Gießkanal eine Form, bei der der erste als Widerstandskanal ausgebildete Kanalteil länger ist als der zweite Kanalteil.Furthermore, the pouring channel has a shape in which the first as a resistance channel trained channel part is longer than the second channel part.
In einer weiteren vorteilhaften Ausgestaltung ist im Widerstandskanai ein Widerstandselement vorgesehen, das als Filter ausgebildet ist und dabei eine Freifläche von 0,6 bis 0,8 x der Querschnittsfläche des Gießkanals besitzt. Die freie Fläche dieses Filters kann dabei außen in einer Feuerfestplatte eingebrachten Bohrung bestehen.In a further advantageous embodiment, one is in the resistance channel Resistor element is provided, which is designed as a filter and a Free space from 0.6 to 0.8 times the cross-sectional area of the pouring channel. The free The surface of this filter can be placed outside in a refractory plate Hole exist.
Die Schmelze wird im Bereich der Zufuhreinrichtung beheizt. Hierzu wird vorgeschlagen, die Wand des Gießkanals aus elektrisch leitfähigem Feuerfestmaterial aufzubauen und als Heizeinrichtung eine Induktionsspule einzusetzen.The melt is heated in the area of the feed device. This will proposed the wall of the pouring channel made of electrically conductive refractory material to build and use an induction coil as a heating device.
Zum Abbremsen der Schmelze wird alleine oder ergänzend zu der oben beschriebenen Drossel eine Wirbelstrombremse vorgesehen, deren statisches magnetisches Feld die Geschwindigkeit der Schmelze abbremst. In einer weiteren Ausgestaltung wird ein Linearmotor vorgesehen, der durch Erzeugung eines entgegen der Strömungsrichtung der Schmelze wandernden Feldes die Geschwindigkeit der Schmelze abbremst.To slow down the melt, alone or in addition to the above choke provided an eddy current brake, the static magnetic field slows down the speed of the melt. In another Embodiment, a linear motor is provided, which by generating a counter the flow direction of the melt migrating field the speed of the Slows down the melt.
In einer besonderen Ausgestaltung wird der erste Gießkanalteil als Rohr ausgestaltet. Dieses Rohr kann im Boden des Aufnahmebehälters in vertikaler Richtung weisend angeordnet sein. Die Mündung dieses Ausgießrohres ist bei dieser Ausgestaltungsform mit einem zweiten Gießkanalteil verbunden, der als sich öffnender Trichter ausgestaltet ist, wobei dessen Mündung Abmessungen aufweist, die dem Fertigprodukt entsprechen. Dabei kann der zweite Kanalteil zur Erreichung einer gleichmäßigen Ausströmgeschwindigkeit über die Strangbreite Querschnittsflächen aufweisen, die in Strömungsrichtung der Schmelze im Gießkanalteil kleiner werden. In a special embodiment, the first pouring channel part is designed as a tube. This tube can point in the bottom of the receptacle in a vertical direction be arranged. The mouth of this pouring pipe is at this Embodiment connected to a second part of the pouring channel, which as an opening Funnel is designed, wherein its mouth has dimensions that the Finished product. The second part of the channel can be used to achieve a uniform outflow speed across the strand width of cross-sectional areas have, which are smaller in the flow direction of the melt in the pouring channel part.
Ein Beispiel der Erfindung ist in der beigefügten Zeichnung dargelegt. Dabei zeigen die
- Figuren 1 und 3
- schematisch die komplette Bandgießeinrichtung zum Erzeugen von dünnen Strängen.
- Figur 2
- Widerstandselemente des Gießkanals.
- Figures 1 and 3
- schematically the complete belt casting device for producing thin strands.
- Figure 2
- Resistance elements of the pouring channel.
Die Figuren 1 und 3 weisen ein mit Flüssigmetall M gefülltes metallurgisches Gefäß 21
auf, welche im Boden eine Bodenöffnung 22 besitzen. An dieser Bodenöffnung 22 ist
ein Tauchausguß 23 angeordnet, der in eine Schmelze M eintaucht, welche sich in
einem Aufnahmebehälter 12 befindet.FIGS. 1 and 3 have a
Die Bodenöffnung 22 des metallurgischen Gefäßes 21 ist in Figur 1 durch einen
Schieber 25 und in Figur 3 durch einen Stopfen (Bewegungspfeil) verschließbar. Durch
Ansteuerung über einen Aktuator 73 ist die aus dem metallurgischen Gefäß 21
abfließende Menge flüssigen Metalls M stufenlos einstellbar.The bottom opening 22 of the
Der Pegelstand des sich im Aufnahmebehälter 12 befindenden Flüssigmetalls M wird
über ein Pegelmeßelement 71 erfaßt, und zwar in der Figur 1 durch einen Schwimmer
74 und in der Figur 3 durch eine Perleinrichtung 75. Der Aktuator 73 und die
Pegelmeßeinrichtung 71 sind mit einem Meß- und Regelgerät 72 verbunden.The level of the liquid metal M located in the
Unterhalb des Aufnahmebehälters 12 ist ein Endlosband 31 vorgesehen, welches eine
angetriebene Umlenkung 32 und eine lose Umlenkung 33 aufweist. Auf dem
Obertrumm 34 des Endlosbandes 32 wird das Flüssigmetall aufgegeben, wo es
erstarrt und als Fertigprodukt S abtransportiert wird.Below the
In der Figur 1 ist die Zuführeinrichtung 11 als Gießkanal ausgebildet, der einen ersten
Gießkanalteil 14 besitzt, welcher als Widerstandskanafteil ausgebildet ist. An diesem
ersten Gießkanatteil 14 schließt sich ein zweiter Gießkanalteil 15 an, welcher eine
Austrittsöffnung 16 besitzt.In Figure 1, the
Die Dicke dw des Widerstandskanalteils ist kleiner als die Strangdicke ds. Der Widerstandskanalteil hat dabei eine Länge L14, die größer ist als die Länge des zweiten Kanalteils L15. The thickness d w of the resistance channel part is smaller than the strand thickness d s . The resistance channel part has a length L 14 that is greater than the length of the second channel part L 15 .
Statt der geringen Dicke dw kann im ersten Gießkanalteil ein Widerstandselement
vorgesehen sein, wie es in der Figur 2 dargestellt ist. Es kann als eigenes
Widerstandselement mit Rechtecköffnung aufgebaut sein (Oberteil des Bildes) oder
auch als ein Filter 42 bestehen, der Bohrungen 43 besitzt (untere Hälfte des Bildes).
Die freie Fläche AF setzt sich dabei zusammen aus der Summe der Bohrungen 43 und
hat dabei eine Größe von 0,6 bis 0,8 x AK (Querschnittsfläche des Gießkanals).Instead of the small thickness d w , a resistance element can be provided in the first pouring channel part, as shown in FIG. 2. It can be constructed as a separate resistance element with a rectangular opening (upper part of the picture) or also as a
In der Wand 17 ist im unteren Teil der Zuführeinrichtung 11 eine Heizeinrichtung
skizzenhaft dargestellt und im oberen Teil eine Induktionsspule 52.In the
In der Figur 3 ist der erste Gießkanalteil 14 rohrförmig ausgestaltet, welchem sich ein
zweiter Gießkanalteil 15 der Zuführeinrichtung 11 anschließt. Der zweite Gießkanalteil
ist dabei als sich öffnender Trichter ausgestattet, der zum Obertrum 34 des
Endlosbandes 31 geneigt ist. In FIG. 3, the first
- 1111
- Zuführeinrichtungfeeding
- 1212
- Aufnahmebehälterreceptacle
- 1313
- Gießkanalpouring
- 1414
- Erster Gießkanalteil/WiderstandskanalteiFirst part of the pouring channel / resistance channel
- 1515
- Zweiter GießkanalteilSecond part of the pouring channel
- 1616
- Austrittsöffnungoutlet opening
- 1717
- Wandwall
- 2121
- Metallurgisches GefäßMetallurgical vessel
- 2222
- Bodenöffnungbottom opening
- 2323
- TauchausgußA submerged nozzle
- 2525
- Schieberpusher
- 3131
- Endlosbandendless belt
- 3232
- Angetriebene UmlenkungDriven redirection
- 3333
- Lose UmfenkungLoose change
- 3434
- Obertrumobertrum
- 4141
- Widerstandselement mit RechtecköffnungResistance element with rectangular opening
- 4242
- Filterfilter
- 4343
- Bohrungdrilling
- 5151
- Heizeinrichtungheater
- 5252
- Induktionsspuleinduction coil
- 7171
- PegelmeßelementPegelmeßelement
- 7272
- Meß- und RegelelementMeasuring and control element
- 7373
- Aktuatoractuator
- 7474
- Schwimmerswimmer
- 7575
- PerteinrichtungPerteinrichtung
Claims (15)
- Method for casting thin bars, especially of steel, using a strip casting device in which liquid metal is fed from a metallurgical vessel (21) through a feed system (11) to a continuous belt (31), in whicha) the liquid metal is passed from the metallurgical vessel (21) into a receptacle (12), on to which is connected the feed system (11) which is divided lengthwise into two sections,b) in the feed system (11), before the liquid metal meets the continuous belt, resistance is presented to the liquid stream in the form of throttle elements, which reduce its flow speed to such an extent that it meets the continuous belt (31) at a speed identical to the belt offtake speed, and has, in the impact area, dimensions that correspond to the cross-sectional area of the finished product,c) the liquid metal stream is heated in the area of the feed system (11),d) the level (P) of the liquid metal in the receptacle (12) and/or the thickness of the bar on the continuous belt are measured and kept at a constant level by means of a control system,e) the current measured values of the level (P) or the thickness (ds) are passed to an actuator which controls the outflow volume of the liquid metal from the metallurgical vessel (21).
- Method as in Claim 1,
characterised in that
in the metallurgical vessel (21), the feed volume of the liquid metal is controlled by maintaining a ratio between the geodetic height of the liquid level (P) and the bar thickness (ds) of - Method as in Claim 1,
characterised in that
the liquid metal is kept at a temperature dose to its melting point. - Method as in one of Claims 1 to 3,
characterised in that
the speed of the liquid metal stream is restrained, and that a static magnetic field is produced to limit the speed of the liquid metal stream. - Method as in one of Claims 1 to 3,
characterised in that
the speed of the liquid metal stream is restrained, and that a magnetic field directed against the direction of flow of the molten mass is produced to limit the speed of the liquid metal stream. - Strip casting apparatus to produce thin bars, especially of steel, with a continuous conveyor belt to which liquid metal is fed by means of a feed system which has a casting channel and which is connected to a metallurgical vessel, for the purpose of implementing the method of Claim 1, in which
the feed system (11) is in the form of a casting channel (13) which has a first channel section in the form of a resistance channel (14)
and
a second casting channel (15), the opening (16) of which faces towards the continuous belt (31), and the dimensions of which correspond to the cross-sectional area of the finished product (S),
there is a heater (51) in the wall (17) of the casting channel (13),
the feed system (11) is connected to a receptacle (12) into which molten metal (M) can be fed from a metallurgical vessel (21), and
there are measuring elements (71) with which the level of the molten metal (M) in the receptacle (12) and/or the thickness (d s) of the bar (S) on the continuous belt can be recorded,
the measured values are linked, via a measurement and control element (7), to an actuator (73), which is connected to an element (24, 25) for controlling the outflow volume from the metallurgical vessel (21). - Strip casting apparatus as in Claim 6,
characterised in that
the resistance channel section (14) has a depth (d w) corresponding to - Strip casting apparatus as in Claims 6 or 7,
characterised in that
the resistance channel section (14) is of a length (L 14), where L 14 > L 15, L 15 being the length of the second section of the channel (15). - Strip casting apparatus as in Claim 8,
characterised in that
in the resistance channel (14) there is a resistance element (41) which is in the form of a filter (42) with an open area (A F), - Strip casting apparatus as in Claim 9,
characterised in that
the open area (A F) of the filter (42) consists of holes (43) made in a refractory plate (44). - Strip casting apparatus as in Claim 6,
characterised in that
the wall (17) of the casting channel (13) is made of an electrically conductive refractory material, and that
the heater (51) is an induction coil (52). - Strip casting apparatus as in Claim 6,
characterised in that
in the wall (17) of the casting channel (13) there Is an eddy current brake which restrains the speed of the liquid metal stream by means of a static magnetic field. - Strip casting apparatus as in Claim 6,
characterised in that
there is a linear induction motor which limits the speed of the liquid metal stream by producing a field moving against the direction of flow of the molten mass. - Strip casting apparatus as in one of Claims 6 to 13,
characterised in that
the first section (14) of the casting channel is in the form of a tube, whose cross-sectional area at its opening is in the form of a diverging funnel, and
that the second section (15) of the channel has essentially the same cross-sectional area as that of the bar (S). - Strip casting apparatus as in Claim 14,
characterised in that
in order to achieve a uniform outflow speed of the liquid metal, the cross-sectional areas of the casting channel (13) become smaller in the direction of the flow of the metal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19711116 | 1997-03-05 | ||
| DE19711116A DE19711116C2 (en) | 1997-03-05 | 1997-03-05 | Method and device for casting thin strands |
| PCT/DE1998/000579 WO1998039121A1 (en) | 1997-03-05 | 1998-02-24 | Method and device for casting thin billets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0964760A1 EP0964760A1 (en) | 1999-12-22 |
| EP0964760B1 true EP0964760B1 (en) | 2003-01-22 |
Family
ID=7823693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98910629A Expired - Lifetime EP0964760B1 (en) | 1997-03-05 | 1998-02-24 | Method and device for casting thin billets |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6450242B1 (en) |
| EP (1) | EP0964760B1 (en) |
| AT (1) | ATE231425T1 (en) |
| AU (1) | AU6494998A (en) |
| DE (2) | DE19711116C2 (en) |
| WO (1) | WO1998039121A1 (en) |
| ZA (1) | ZA981795B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060191664A1 (en) * | 2005-02-25 | 2006-08-31 | John Sulzer | Method of and molten metal feeder for continuous casting |
| DE102007055346A1 (en) * | 2007-11-19 | 2009-05-20 | Sms Demag Ag | Casting machine with a device for application to a casting belt |
| US20130112364A1 (en) * | 2007-11-19 | 2013-05-09 | Sms Siemag Aktiengesellschaft | Casting system with a device for applying fluid on a cast strip |
| DE102015114725B3 (en) * | 2015-09-03 | 2016-12-08 | Salzgitter Flachstahl Gmbh | Melt feed system for a horizontal strip caster |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6163349A (en) * | 1984-09-05 | 1986-04-01 | Nippon Kokan Kk <Nkk> | Method for controlling push back rate of billet in horizontal and continuous casting installation |
| DE3521778A1 (en) * | 1985-06-19 | 1987-01-02 | Sundwiger Eisen Maschinen | Method for the production of a metal strand, in particular in the form of a strip or section, by casting and an apparatus for carrying out this method |
| CA1296505C (en) * | 1987-05-06 | 1992-03-03 | R. Guthrie Research Associates Inc. | Continuous casting of thin metal strip |
| ES2056083T3 (en) * | 1987-09-07 | 1994-10-01 | Danieli Off Mecc | CASTING METHOD FOR A CONTINUOUS CASTING MACHINE OF A REDUCED HEIGHT AND CORRESPONDING SUBMERGED CASTING NOZZLE. |
| AU608445B2 (en) * | 1988-05-16 | 1991-03-28 | Nippon Steel Corporation | Injector for high speed thin continuous casting machine and pouring control method |
| FR2656995B1 (en) * | 1990-01-17 | 1993-09-10 | Somogyi Stephens | PERFUME BOTTLE. |
| DE4039959C1 (en) * | 1990-12-14 | 1992-01-23 | Wieland-Werke Ag, 7900 Ulm, De | |
| US5148885A (en) * | 1991-03-29 | 1992-09-22 | Weyer Paul P | Steerable utility vehicle |
| SE9102022L (en) * | 1991-07-01 | 1993-01-02 | Stiftelsen Metallurg Forsk | SET AND CASTING MACHINE FOR CONTINUOUS CASTING OF METAL BELTS |
| DE4218587C1 (en) * | 1991-09-27 | 1993-11-04 | Wieland Werke Ag | METHOD AND DEVICE FOR PRODUCING A METAL STRIP NEAR DIMENSIONS |
| US5238049A (en) * | 1992-10-06 | 1993-08-24 | Reynolds Metals Company | Adjustable flow control device for continuous casting of metal strip |
| CA2088401A1 (en) * | 1993-01-29 | 1994-07-30 | Her Majesty The Queen, In Right Of Canada As Represented By The Minister Of Natural Resources Canada | Pneumatic flow control of liquid metals |
| DE4344953C2 (en) * | 1993-12-27 | 1996-10-02 | Mannesmann Ag | Method and device for casting a metal strip close to its final dimensions |
| US5439047A (en) * | 1994-02-07 | 1995-08-08 | Eckert; C. Edward | Heated nozzle for continuous caster |
| US5709260A (en) * | 1995-08-22 | 1998-01-20 | Wagstaff, Inc. | Molten metal admission control in casting |
| EP0798061A4 (en) * | 1995-10-18 | 1999-06-30 | Sumitomo Metal Ind | Method for controlling the level of molten metal for a continuous casting machine |
| AU714976B2 (en) * | 1996-04-29 | 2000-01-13 | Bhp Steel (Jla) Pty Limited | Magnetic braking |
-
1997
- 1997-03-05 DE DE19711116A patent/DE19711116C2/en not_active Expired - Fee Related
-
1998
- 1998-02-24 AT AT98910629T patent/ATE231425T1/en active
- 1998-02-24 EP EP98910629A patent/EP0964760B1/en not_active Expired - Lifetime
- 1998-02-24 WO PCT/DE1998/000579 patent/WO1998039121A1/en active IP Right Grant
- 1998-02-24 DE DE59807007T patent/DE59807007D1/en not_active Expired - Lifetime
- 1998-02-24 AU AU64949/98A patent/AU6494998A/en not_active Abandoned
- 1998-02-24 US US09/380,334 patent/US6450242B1/en not_active Expired - Fee Related
- 1998-03-03 ZA ZA981795A patent/ZA981795B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE19711116C2 (en) | 1999-05-12 |
| DE19711116A1 (en) | 1998-09-17 |
| US6450242B1 (en) | 2002-09-17 |
| ATE231425T1 (en) | 2003-02-15 |
| WO1998039121A1 (en) | 1998-09-11 |
| AU6494998A (en) | 1998-09-22 |
| ZA981795B (en) | 1998-09-02 |
| DE59807007D1 (en) | 2003-02-27 |
| EP0964760A1 (en) | 1999-12-22 |
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