EP2176016A1 - Method and device for equalization of the heat transfer of a cast product during the solidification thereof on a metal conveyor belt of a horizontal strip casting system - Google Patents

Method and device for equalization of the heat transfer of a cast product during the solidification thereof on a metal conveyor belt of a horizontal strip casting system

Info

Publication number
EP2176016A1
EP2176016A1 EP08785302A EP08785302A EP2176016A1 EP 2176016 A1 EP2176016 A1 EP 2176016A1 EP 08785302 A EP08785302 A EP 08785302A EP 08785302 A EP08785302 A EP 08785302A EP 2176016 A1 EP2176016 A1 EP 2176016A1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
strip
cast product
metal conveyor
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08785302A
Other languages
German (de)
French (fr)
Other versions
EP2176016B1 (en
Inventor
Jörg BAUSCH
Hans Jürgen HECKEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Siemag AG
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Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2176016A1 publication Critical patent/EP2176016A1/en
Application granted granted Critical
Publication of EP2176016B1 publication Critical patent/EP2176016B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • 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
    • 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
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening 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
    • B22D11/14—Plants for continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting for horizontal casting

Definitions

  • the invention relates to a method and a device for close-to-near-casting of rectangular metal strands and subsequent further processing into metal strips by the DSC process (direct strip casting) in a horizontal strip casting plant, wherein the molten metal by means of a melt delivery system on at Bottom cooled horizontal metal conveyor belt is cast and solidifies the liquid cast product on this metal conveyor belt during its transport to the pre-band, which is then conveyed to the driver after leaving the metal conveyor belt - mechanically clamped for example by smoothing / driving rollers.
  • the structure with smoothing / driving rollers is not absolutely necessary, the structure can also be realized without these roles.
  • the top of the belt is cooled only by convection with the ambient atmosphere and by heat radiation, while its bottom in direct contact with a cooled Metal conveyor belt is stationary, the band already deformed during solidification and then first up and then down.
  • the lowermost material layer of the band contracts most strongly due to very large temperature gradients.
  • the entire band curves upwards in the middle, with very high stresses being introduced in the upper layer. Since these stresses are greater than the flow stress, they degrade in the further course of solidification by elongation (flow), whereby an opposite curvature of the Band center down gives. As a result, the lower layer remains initially elongated, the upper one shortened.
  • the thermal expansion is also compensated for.
  • the upper shortened and the lower elongated band areas now cause a backward curvature, whereby the band edges bulge upwards.
  • the stresses occurring below or below the yield point so that no or a very small regression of the curvature
  • the degree of freedom of this warping in the longitudinal direction due to the weight of the horizontally transported on the subsequent roller conveyor belt and / or by one or more following the metal conveyor belt following drive or smoothing rollers is limited to the first and then the entire band Clamp the belt mechanically and force it flow-downwards to the plane-parallel run.
  • This restriction of the degree of freedom then leads to the fact that the stresses present in the band must be dissipated in non-clamped areas, which is why the band narrow sides first bulge up after leaving the metal conveyor belt.
  • WO 2006/066552 A1 To counter this problem and to avoid the effect of the profiling of the pre-strip in the casting area and the threading in the To ensure downstream units is proposed in WO 2006/066552 A1, to arrange a guide element at the end of the primary cooling zone and before the start of the usual secondary cooling zone.
  • the guide element consists of several above and below the pre-strip in top to top or mutually offset roles.
  • the pre-strip is guided into a plane lying above the casting line in order to absorb the elongation of the underside of the pre-strip by the upward movement thereby carried out.
  • a roller assembly in which the sub-band undulating passes through the set of rollers is possible, but has not been used.
  • a disadvantage of the method known from WO 2006/066552 A1 is that a thorough influencing of the thermal processes on the metal conveyor belt is only incompletely possible due to the guide element following the metal conveyor belt.
  • the stated object is procedurally achieved with the features of claim 1, characterized in that to avoid a possible up to the pouring of the casting rear buckling of the strip edges and to equalize the heat transfer to the cast product during its He-stiffening on the metal conveyor belt following steps are combined : Production of a maximum contact of the cast product on the metal conveyor belt, one of which is above the cast product in the area of the casting Cooled pressure device arranged from the top onto the cast product solidifying toward the pre-band, preferably on the band edges thereof, compensating the abruptly reduced cooling of the underside of the pre-band when leaving the metal conveyor belt, for this purpose in a defined area immediately behind the metal conveyor belt the underside of the Vorbandes and optionally simultaneously the top, optionally over the entire width, additionally cooled.
  • the required pressure is applied by a pressure roller acting on the entire width of the cast product or by partial pressure rollers acting only on the strip edges.
  • the pressure rollers are preferably driven separately and cooled inside.
  • the required pressure can also be applied by a circumferential pressure belt resting on the entire width of the cast product, which likewise can be driven and cooled separately.
  • FIG. 2a shows an enlarged partial section of FIG. 1 with open injection cooling
  • FIG. 2b shows an enlarged partial section of FIG. 1 with circulating cooling belts
  • FIG. 3a is a plan view of a partial detail of FIG. 1 according to the prior art
  • FIG. 4a is a plan view of Fig. 3 with a pressure roller
  • FIG. 5 shows the plan view of FIG. 3 with partial pressure rollers
  • Fig. 6 is a plan view of Fig. 3 with a printing tape.
  • FIG. 1 shows a side view of a strip caster 1 according to the DSC method with its essential components.
  • this plant consists of the actual casting machine 2 with the ladle 2 ', a distributor channel 3, a melt delivery system 3' and a circulating metal conveyor belt 7.
  • the from the ladle 2 'through the distributor channel 3 downflowing molten metal is applied by the melt delivery system 3 'in a certain thickness on the cooled metal conveyor belt 7 as a cast product 4.
  • the length of the metal conveyor belt 7 is designed so that the residence time of the cast product 4 on the metal conveyor belt 7 is sufficient for its extensive solidification to the pre-strip 5.
  • the metal conveyor belt 7, which has, for example, only a thickness of about 1 mm, is driven and guided by two deflection rollers 8, 9 and, for example, a tensioning roller 10.
  • a follower dam block chain 15 is arranged on each side of the metal conveyor belt 7.
  • On the metal conveyor belt 7 close for transport and for safe management of fully solidified Vorbandes 5 smooth / drive rollers 14, which mechanically clamp the Vorband and promote to a driver 16, from where it is then fed to its further processing.
  • a pressure roller 11 is arranged above the cast product 4 in the region of the deflection roller 8 located at the end of the metal conveyor belt 7.
  • a maximum contact of at least the strip edges of the cast product 4 with the metal conveyor belt 7 can be forced by a correspondingly exerted pressure on the cast product 4.
  • FIG. 2a an enlarged partial section of Fig. 1, in addition to the pressure roller 11, which acts from above with a certain pressure on the cast product 4, this in combination according to the invention carried out additional cooling the underside of the pre-strip 5 in the form of spray cooling 17 drawn. This cooling is adjusted so that it acts only in a defined area, which can extend over the entire width of the pre-strip 5 and in the illustrated embodiment, from the end of the metal conveyor belt 7 to the first of the lower smooth / drive rollers 14 enough.
  • FIG. 2b An alternative cooling of the pre-strip 5 in the form of a closed cooling is shown in FIG. 2b.
  • This cooling which also takes place only in a defined area immediately behind the deflection roller 8, is performed with a circulating cooling belt 19, 19 '. 2a, only the underside of the pre-strip 5 can be cooled by a cooling belt 19 arranged there and / or optionally also the upper side of the pre-belt by a further cooling belt 19 'arranged on the upper side of the pre-belt 5.
  • the strip casting machine 1 of FIGS. 1 and 2 is shown in a perspective plan view in FIGS. 3 to 6.
  • FIG. 3 a shows by way of example a part of the strip casting installation 1 from the distribution channel 3 / melt delivery system 3 'to the end of the metal transport strip 7 according to the prior art.
  • the line “A” represents a cross section through the cast product 4 in the front half of the metal conveyor belt 7,
  • the line “B” shows a cross section through the cast product 4 at the end of the metal conveyor belt 7 and
  • the line "C” represents a cross section through the solidified Preband 5, which rests on a roller table T after leaving the metal conveyor belt 7.
  • FIG. 3b the high arching of the band described in FIG. 3a is more clearly represented by the band cross sections resulting in the respective cross-sectional lines.
  • the cross-sectional line "A” the cast product 4, which is not completely solidified, still rests on its underlay, the metal conveyor belt 7, due to its weight and its existing plastic properties with complete contact of the now no longer plastic cast product 4 detached from the metal conveyor belt 7, the cast product 4 now has a slightly curved cross-section.
  • the cross-section line "C” the warping of the strip edges 6 has progressed further and the cross-section of the fully solidified pre-strip 5 resting on a roller conveyor 7 'extending the metal conveyor belt 7 has approximately the shape of a rain gutter.
  • FIG. 4a shows the change in the warping of the band edges 6 which occurs as a result of the use of a pressure roller 11 arranged in the region of the cross-section line "B."
  • the bulge region 18 of the band edges 6 only begins with a significantly reduced absolute value starting from the cross-section line "B".
  • the pressure roller 11 thus also acts backwards with respect to the cross-section line "A” with an effect suppressing the bulging of the band edges 6.
  • the further upward bending of the band edges 6 to the cross-sectional line "C" can indeed be achieved by the pressure roller 11 is not completely suppress, but is significantly lower than in Fig. 3a without pressure roller 11.
  • partial pressure rollers 12 are used as a printing device as an alternative to the pressure roller 11 in the same area at the end of the metal conveyor belt, which act exclusively on the belt edges 6.
  • the effect achieved by this measure is quite comparable to the mode of action of a pressure roller 11, as becomes clear from the indicated bulge area 18.
  • a further alternative to the pressure rollers 11 or partial pressure rollers 12 is the use of a pressure belt 13, which acts according to the figure 6 on a larger area of the cast product 4 with pressure.
  • the bulge area 18 resulting here is therefore somewhat smaller than in the previously described pressure rollers 11, 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

In the casting close to the final measuring of rectangular billets made of metal and the subsequent further processing thereof into metal strips according to the DSC method (direct strip casting) in a horizontal continuous casting system, the cast product (4) is deformed during the solidification thereof into the preliminary strip (5) due to uneven heat dissipation because the top of the strip is cooled only by convection of ambient air and by heat dissipation, while the bottom of said strip is in direct contact with a cooled metal conveyor belt (7). In this manner, the initially complete contact between the cast product (4) and the metal conveyor belt (7) is lost and the strip edges of the cast product arch upwards. In order to ensure in a simple manner maximum contact of the cast product (4) on the metal conveyor belt (7), thus optimizing and equalizing the heat transfer of the cast product (4) to the metal conveyor belt (7) across the entire casting width, the invention proposes that pressure be applied from above to the cast product (4) solidifying into the preliminary strip (5), preferably to the strip edges (6) thereof by means of a pressure device (11) disposed at the end of the metal conveyor belt (7) and, in order to compensate for the suddenly reduced cooling of the bottom of the preliminary strip upon leaving the metal conveyor belt (7), that the bottom of the preliminary strip be additionally cooled in a defined area directly behind the metal conveyor belt (7).

Description

Verfahren und Vorrichtung zur Vergleichmäßigung des Wärmeübergangs eines Gussprodukts während seiner Erstarrung auf dem Metalltransportband einer horizontalen Bandgießanlage Method and apparatus for equalizing the heat transfer of a cast product during its solidification on the metal conveyor belt of a horizontal strip caster
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum endabmessungs- nahen Gießen von rechteckigen Strängen aus Metall und anschließender Weiterverarbeitung zu Metallbändern nach dem DSC-Verfahren (Direct Strip Casting) in einer horizontalen Bandgießanlage, wobei die Metallschmelze mit- tels eines Schmelzenaufgabesystems auf ein an der Unterseite gekühltes horizontal umlaufendes Metalltransportband gegossen wird und das flüssige Gussprodukt auf diesem Metalltransportband während seines Transports zum Vorband erstarrt, welches dann nach Verlassen des Metalltransportbandes - beispielsweise durch Glätt-/ Treib-Rollen mechanisch eingespannt - zu einem Treiber gefördert wird. Der Aufbau mit Glätt-/Treibrollen ist nicht zwingend erforderlich, der Aufbau kann auch ohne diese Rollen realisiert werden.The invention relates to a method and a device for close-to-near-casting of rectangular metal strands and subsequent further processing into metal strips by the DSC process (direct strip casting) in a horizontal strip casting plant, wherein the molten metal by means of a melt delivery system on at Bottom cooled horizontal metal conveyor belt is cast and solidifies the liquid cast product on this metal conveyor belt during its transport to the pre-band, which is then conveyed to the driver after leaving the metal conveyor belt - mechanically clamped for example by smoothing / driving rollers. The structure with smoothing / driving rollers is not absolutely necessary, the structure can also be realized without these roles.
Auf Grund der ungleichen Wärmeabfuhr beim Erstarrungsprozess des nach dem DSC-Verfahren unter Inert-Atmosphäre ohne Gießpulver gegossenen Bandes, wobei die Oberseite des Bandes nur durch Konvektion mit der Umgebungs-Atmosphäre und durch Wärmeabstrahlung gekühlt wird, während seine Unterseite in direktem Kontakt mit einem gekühltem Metalltransportband steht, verformt sich das Band bereits während der Erstarrung und danach zunächst nach oben und dann nach unten.Due to the unequal heat dissipation in the solidification process of the DSC method under inert atmosphere cast without casting powder tape, the top of the belt is cooled only by convection with the ambient atmosphere and by heat radiation, while its bottom in direct contact with a cooled Metal conveyor belt is stationary, the band already deformed during solidification and then first up and then down.
Zu Beginn der Abkühlung kontrahiert die unterste Materialschicht des Bandes am stärksten aufgrund sehr großer Temperatur-Gradienten. Das gesamte Band krümmt sich mittig nach oben durch, wobei sehr hohe Spannungen in der oberen Schicht eingebracht werden. Da diese Spannungen größer als die Fließ- Spannung sind, bauen sie sich im weiteren Verlauf der Erstarrung durch Längung (Fließen) wieder ab, wodurch sich ein entgegengesetztes Krümmen der Bandmitte nach unten ergibt. Als Folge verbleibt die untere Schicht zunächst gelängt, die obere gekürzt.At the beginning of the cooling, the lowermost material layer of the band contracts most strongly due to very large temperature gradients. The entire band curves upwards in the middle, with very high stresses being introduced in the upper layer. Since these stresses are greater than the flow stress, they degrade in the further course of solidification by elongation (flow), whereby an opposite curvature of the Band center down gives. As a result, the lower layer remains initially elongated, the upper one shortened.
Wenn sich dann bei Verlassen des üblicherweise auf dessen Oberseite nicht geführten Bandes vom mitlaufenden Metalltransportband die Temperatur des Bandes über die Banddicke wegen der jetzt verringerten Kühlung der Bandunterseite ausgleicht, gleicht sich auch die thermische Dehnung an. Die oberen gekürzten und die unteren gelängten Bandbereiche verursachen nun eine Rückkrümmung, wobei sich die Bandränder nach oben wölben. Die dabei auftretenden Spannungen sind jedoch unterhalb oder nahe der Fließgrenze, so dass sich keine oder eine sehr geringe Rückbildung der Krümmung durchIf the temperature of the strip over the strip thickness then compensates for the now-reduced cooling of the underside of the strip when leaving the strip, which is normally not guided on its upper side, from the moving metal conveyor belt, the thermal expansion is also compensated for. The upper shortened and the lower elongated band areas now cause a backward curvature, whereby the band edges bulge upwards. However, the stresses occurring below or below the yield point, so that no or a very small regression of the curvature
Fließvorgänge beobachten lässt. Die Krümmung nach oben bleibt bestehen und resultiert in einem Wölben der Band-Schmalseiten und ebenso des Bandkopfes ähnlich einem Ski.Observe flow processes. The upward curvature remains and results in a bowing of the narrow sides of the tape and also of the tape head similar to a ski.
Im weiteren Transportverlauf des Bandes wird der Freiheitsgrad dieser Verwöl- bungen in Längsrichtung aufgrund der Gewichtskraft des auf dem anschließenden Rollgang horizontal transportierten Band und/oder durch eine oder mehrere nach dem Metalltransportband folgende Treib- oder Glättrollen beschränkt, die zunächst die Bandspitze und dann das gesamte Band mechanisch einspannen und fluss-abwärts zum planparallelen Lauf zwingen. Diese Einschränkung des Freiheitsgrades führt dann dazu, dass die im Band vorhandenen Spannungen in nicht eingespannten Bereichen abgebaut werden müssen, weshalb sich die Bandschmalseiten zunächst nach Verlassen des Metalltransportbandes hoch wölben. Dieses Verhalten erstreckt sich zurück bis in den Bereich des Metall- transportbandes, so dass das erstarrende Band teilweise keinen Kontakt mehr zum Metalltransportband und so zum Kühlmedium hat mit dem Ergebnis einer inhomogenen Temperaturverteilung über die Breite des Bandes, das wie eine Regenrinne profiliert ist.In the further course of transport of the strip, the degree of freedom of this warping in the longitudinal direction due to the weight of the horizontally transported on the subsequent roller conveyor belt and / or by one or more following the metal conveyor belt following drive or smoothing rollers is limited to the first and then the entire band Clamp the belt mechanically and force it flow-downwards to the plane-parallel run. This restriction of the degree of freedom then leads to the fact that the stresses present in the band must be dissipated in non-clamped areas, which is why the band narrow sides first bulge up after leaving the metal conveyor belt. This behavior extends back into the region of the metal transport belt, so that the solidifying belt partially no longer has contact with the metal conveyor belt and thus with the cooling medium, with the result of an inhomogeneous temperature distribution across the width of the belt, which is profiled like a rain gutter.
Um diesem Problem zu begegnen und um das Rückwirken der Profilierung des Vorbandes in den Gießbereich zu vermeiden und um das Einfädeln in die nachgeschalteten Aggregate sicherzustellen, wird in der WO 2006/066552 A1 vorgeschlagen, am Ende der Primärkühlzone und vor Beginn der üblichen Sekundärkühlzone ein Führungselement anzuordnen. Im Regelfall besteht das Führungselement aus mehreren oberhalb und unterhalb des Vorbandes in Top zu Top oder versetzt zueinander angeordneten Rollen.To counter this problem and to avoid the effect of the profiling of the pre-strip in the casting area and the threading in the To ensure downstream units is proposed in WO 2006/066552 A1, to arrange a guide element at the end of the primary cooling zone and before the start of the usual secondary cooling zone. As a rule, the guide element consists of several above and below the pre-strip in top to top or mutually offset roles.
Bei einer besonderen Anordnung der Rollen wird das Vorband in eine oberhalb der Gießlinie liegende Ebene geführt, um durch die dabei durchgeführte Aufwärtsbewegung die Dehnung der Unterseite des Vorbandes aufzunehmen. Auch eine Rollenanordnung, bei der das Vorband wellenförmig den Rollensatz durchläuft, ist möglich, wurde aber bisher nicht eingesetzt.In a particular arrangement of the rollers, the pre-strip is guided into a plane lying above the casting line in order to absorb the elongation of the underside of the pre-strip by the upward movement thereby carried out. Also, a roller assembly in which the sub-band undulating passes through the set of rollers is possible, but has not been used.
Nachteilig bei dem aus der WO 2006/066552 A1 bekannten Verfahren ist, dass durch das dem Metalltransportband nachfolgende Führungselement eine durchgreifende Beeinflussung der thermischen Vorgänge auf dem Metalltransport- band nur unvollständig möglich ist.A disadvantage of the method known from WO 2006/066552 A1 is that a thorough influencing of the thermal processes on the metal conveyor belt is only incompletely possible due to the guide element following the metal conveyor belt.
Ausgehend von diesem geschilderten Stand der Technik ist es deshalb Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung anzugeben, mit denen in einfacher Weise ein maximaler Kontakt des Gussproduktes auf dem Metall- transportband und damit eine Optimierung und Vergleichmäßigung der Wärmeübertragung des Gussproduktes zum Metalltransportband über die gesamte Gießbreite gewährleistet werden kann.Based on this described prior art, it is therefore an object of the invention to provide a method and an apparatus with which in a simple manner a maximum contact of the cast product on the metal conveyor belt and thus an optimization and equalization of heat transfer of the cast product to the metal conveyor belt on the entire casting width can be guaranteed.
Die gestellte Aufgabe wird verfahrensmäßig mit den Merkmalen des Anspruchs 1 dadurch gelöst, dass zur Vermeidung eines bis in den Ausgießbereich der Gießmaschine möglichen rückwärtigen Aufwölbens der Bandkanten und zur Vergleichmäßigung des Wärmeübergangs auf das Gussprodukt während seiner Er-starrung auf dem Metalltransportband folgende Verfahrensschritte miteinander kombiniert werden: Herstellung eines maximalen Kontakts des Gussproduktes auf dem Metalltransportband, wozu eine oberhalb des Gussproduktes im Bereich des in Gieß- richtung flussabwärts befindlichen Endes des Metalltransportbandes angeordnete gekühlte Druckvorrichtung von oben auf das zum Vorband erstarrende Gussprodukt, vorzugsweise auf dessen Bandkanten gedrückt wird, Kompensierung der bei Verlassen des Metalltransportbandes schlagartig verringerten Kühlung der Unterseite des Vorbandes, wozu in einem definierten Be- reich unmittelbar hinter dem Metalltransportband die Unterseite des Vorbandes und wahlweise gleichzeitig die Oberseite, wahlweise über die gesamte Breite, zusätzlich gekühlt wird.The stated object is procedurally achieved with the features of claim 1, characterized in that to avoid a possible up to the pouring of the casting rear buckling of the strip edges and to equalize the heat transfer to the cast product during its He-stiffening on the metal conveyor belt following steps are combined : Production of a maximum contact of the cast product on the metal conveyor belt, one of which is above the cast product in the area of the casting Cooled pressure device arranged from the top onto the cast product solidifying toward the pre-band, preferably on the band edges thereof, compensating the abruptly reduced cooling of the underside of the pre-band when leaving the metal conveyor belt, for this purpose in a defined area immediately behind the metal conveyor belt the underside of the Vorbandes and optionally simultaneously the top, optionally over the entire width, additionally cooled.
Durch den im Bereich des Metalltransportband-Endes erfindungsgemäß von oben auf das Gussprodukt und hier insbesondere auf dessen Bandkanten ausgeübten Druck, durch den ein vollständiger Kontakt der Unterseite des Gussproduktes mit dem Metalltransportband erzwungen wird, verbunden mit der zusätzlichen Kühlung der Vorbandunterseite, lässt sich eine Optimierung und Vergleichmäßigung der Wärmeübertragung vom Metalltransportband zum Gussprodukt über die gesamte Gießbreite und ein Wärmeausgleich innerhalb des Vorbandes nach Verlassen des Metalltransportbandes erreichen.By according to the invention in the region of the metal conveyor belt end from the top of the cast product and here in particular on the belt edges pressure enforced by the complete contact of the bottom of the cast product with the metal conveyor belt, connected to the additional cooling of the Vorbandunterseite, can be an optimization and homogenization of the heat transfer from the metal conveyor belt to the cast product over the entire casting width and achieve a heat balance within the Vorbandes after leaving the metal conveyor belt.
Der erforderliche Druck wird hierzu von einer auf die gesamte Breite des Gussproduktes einwirkenden Druckrolle oder durch nur auf die Bandkanten einwir- kende Teildruckrollen aufgebracht. Die Druckrollen werden dabei vorzugsweise separat angetrieben und innen gekühlt. Erfindungsgemäß kann der erforderliche Druck auch durch ein auf der gesamten Breite des Gussproduktes aufliegendes umlaufendes Druckband aufgebracht werden, das gleichfalls separat angetrieben und gekühlt werden kann.For this purpose, the required pressure is applied by a pressure roller acting on the entire width of the cast product or by partial pressure rollers acting only on the strip edges. The pressure rollers are preferably driven separately and cooled inside. According to the invention, the required pressure can also be applied by a circumferential pressure belt resting on the entire width of the cast product, which likewise can be driven and cooled separately.
In Kombination mit dem Druck auf das Gussprodukt wird gemäß der Erfindung gleichzeitig eine Kühlung der Vorbandunterseite in einem definierten Bereich unmittelbar hinter dem Metalltransportband durchgeführt, wobei sich dieser definierte Bereich über die gesamte Breite des Vorbandes und bei Vorhandensein von Glatt-/ Treib-Rollen bis zu diesen erstrecken kann. Diese Kühlung geschieht durch eine offene Spritzkühlung, beispielsweise mit Wasser, und/oder durch eine geschlossene Kühlung mittels eines umlaufenden gekühlten Kühlbandes, welches ähnlich wie das Metalltransportband in Kontakt mit der Vorbandunterseite steht. Erfindungsgemäß ist es auch möglich, gleichzeitig auf der Vorbandoberseite ein umlaufendes Kühlband anzuordnen, um das Vorband zu führen und definiert unterschiedlich angepasst zu kühlen.In combination with the pressure on the cast product cooling of the Vorbandunterseite is carried out in a defined area immediately behind the metal conveyor belt according to the invention at the same time, this defined area over the entire width of the Vorbandes and in the presence of smooth / Treib roles up to can extend this. This cooling is done by an open spray cooling, for example with water, and / or by a closed cooling by means of a circulating cooled cooling belt, which is similar to the metal conveyor belt in contact with the Vorbandunterseite. According to the invention, it is also possible to arrange a circulating cooling belt at the same time on the pre-strip top side in order to guide the pre-strip and to cool it in a differently adapted manner.
Weitere Einzelheiten und Vorteile der Erfindung werden nachfolgend an in schematischen Zeichnungsfiguren dargestellten Ausführungsbeispielen näher erläutert.Further details and advantages of the invention are explained in more detail below by way of exemplary embodiments illustrated in schematic drawing figures.
Es zeigen:Show it:
Fig. 1 das Layout einer Gießanlage mit ihren wesentlichen Komponenten,1 shows the layout of a casting plant with its essential components,
Fig. 2a einen vergrößerten Teilausschnitt der Fig. 1 mit offener Spritzküh- lung,2a shows an enlarged partial section of FIG. 1 with open injection cooling,
Fig. 2b einen vergrößerten Teilausschnitt der Fig. 1 mit umlaufenden Kühlbändern,2b shows an enlarged partial section of FIG. 1 with circulating cooling belts,
Fig. 3a eine Draufsicht auf einen Teilausschnitt der Fig. 1 nach dem Stand der Technik,3a is a plan view of a partial detail of FIG. 1 according to the prior art,
Fig. 3b Querschnitte durch das Gussprodukt/Vorband nach dem Stand der Technik,3b cross sections through the cast product / Vorband according to the prior art,
Fig. 4a die Draufsicht der Fig. 3 mit einer Druckrolle,4a is a plan view of Fig. 3 with a pressure roller,
Fig. 4b Querschnitte durch das Gussprodukt/Vorband mit eingesetzter Druckrolle,4b cross sections through the cast product / pre-strip with inserted pressure roller,
Fig. 5 die Draufsicht der Fig. 3 mit Teildruckrollen, Fig. 6 die Draufsicht der Fig. 3 mit einem Druckband.5 shows the plan view of FIG. 3 with partial pressure rollers, Fig. 6 is a plan view of Fig. 3 with a printing tape.
In der Figur 1 ist eine Seitenansicht einer Bandgießanlage 1 nach dem DSC- Verfahren mit ihren wesentlichen Komponenten dargestellt. In Gießrichtung (in der Zeichnung von links nach rechts) besteht diese Anlage aus der eigentlichen Gießmaschine 2 mit der Gießpfanne 2', einer Verteilerrinne 3, einem Schmel- zenaufgabesystem 3' und einem umlaufenden Metalltransportband 7. Die aus der Gießpfanne 2' durch die Verteilerrinne 3 nach unten ablaufende Metall- schmelze wird von dem Schmelzenaufgabesystem 3' in einer bestimmten Dicke auf das gekühlte Metalltransportband 7 als Gussprodukt 4 aufgebracht. Die Länge des Metalltransportbandes 7 ist so ausgelegt, dass die Verweilzeit des Gussproduktes 4 auf dem Metalltransportband 7 zu seiner weitgehenden Erstarrung zum Vorband 5 ausreicht. Das Metalltransportband 7, das beispiels- weise nur eine Dicke von ca. 1 mm besitzt, wird von zwei Umlenkrollen 8, 9 und beispielsweise einer Spannrolle 10 angetrieben und geführt. Zur seitlichen Begrenzung des Gussproduktes 4 auf dem Metalltransportband 7 ist an jeder Seite des Metalltransportbandes 7 eine mitlaufende Dammblockkette 15 angeordnet. An das Metalltransportband 7 schließen sich zum Transport und zur siche- ren Führung des vollständig erstarrten Vorbandes 5 Glatt-/ Treib-Rollen 14 an, die das Vorband mechanisch einspannen und zu einem Treiber 16 fördern, von wo es dann seiner weiteren Bearbeitung zugeführt wird.FIG. 1 shows a side view of a strip caster 1 according to the DSC method with its essential components. In the casting direction (in the drawing from left to right), this plant consists of the actual casting machine 2 with the ladle 2 ', a distributor channel 3, a melt delivery system 3' and a circulating metal conveyor belt 7. The from the ladle 2 'through the distributor channel 3 downflowing molten metal is applied by the melt delivery system 3 'in a certain thickness on the cooled metal conveyor belt 7 as a cast product 4. The length of the metal conveyor belt 7 is designed so that the residence time of the cast product 4 on the metal conveyor belt 7 is sufficient for its extensive solidification to the pre-strip 5. The metal conveyor belt 7, which has, for example, only a thickness of about 1 mm, is driven and guided by two deflection rollers 8, 9 and, for example, a tensioning roller 10. For lateral delimitation of the cast product 4 on the metal conveyor belt 7, a follower dam block chain 15 is arranged on each side of the metal conveyor belt 7. On the metal conveyor belt 7 close for transport and for safe management of fully solidified Vorbandes 5 smooth / drive rollers 14, which mechanically clamp the Vorband and promote to a driver 16, from where it is then fed to its further processing.
In dieser dem Stand der Technik entsprechenden Bandgießanlage 1 ist erfin- dungsgemäß im Bereich der am Ende des Metalltransportbandes 7 befindlichen Umlenkrolle 8 oberhalb des Gussproduktes 4 eine Druckrolle 11 angeordnet. Durch diese auf dem Gussprodukt 4 aufliegende Druckrolle 11 kann durch einen entsprechend ausgeübten Druck auf das Gussprodukt 4 ein maximaler Kontakt zumindest der Bandkanten des Gussproduktes 4 mit dem Metalltrans- portband 7 erzwungen werden. In der Figur 2a, einem vergrößerten Teilausschnitt der Fig. 1 , ist zusätzlich zu der Druckrolle 11 , die von oben mit einem bestimmten Druck auf das Gussprodukt 4 einwirkt, die hierzu in Kombination erfindungsgemäß durchgeführte zusätzliche Kühlung der Unterseite des Vorbandes 5 in Form einer Spritzkühlung 17 eingezeichnet. Diese Kühlung ist so eingestellt, dass sie nur in einem defi- nierten Bereich wirkt, der sich über die gesamte Breite des Vorbandes 5 erstrecken kann und der im dargestellten Ausführungsbeispiel vom Ende des Metalltransportbandes 7 bis zur ersten der unteren Glatt-/ Treib-Rollen 14 reicht.In this prior art strip casting machine 1, according to the invention, a pressure roller 11 is arranged above the cast product 4 in the region of the deflection roller 8 located at the end of the metal conveyor belt 7. By means of this pressure roller 11 resting on the cast product 4, a maximum contact of at least the strip edges of the cast product 4 with the metal conveyor belt 7 can be forced by a correspondingly exerted pressure on the cast product 4. In the figure 2a, an enlarged partial section of Fig. 1, in addition to the pressure roller 11, which acts from above with a certain pressure on the cast product 4, this in combination according to the invention carried out additional cooling the underside of the pre-strip 5 in the form of spray cooling 17 drawn. This cooling is adjusted so that it acts only in a defined area, which can extend over the entire width of the pre-strip 5 and in the illustrated embodiment, from the end of the metal conveyor belt 7 to the first of the lower smooth / drive rollers 14 enough.
Eine alternative Kühlung des Vorbandes 5 in Form einer geschlossenen Küh- lung ist in der Figur 2b dargestellt. Diese Kühlung, die gleichfalls nur in einem definierten Bereich unmittelbar hinter der Umlenkrolle 8 stattfindet, wird mit einem umlaufenden Kühlband 19, 19' durchgeführt. Hierbei kann wie bei der Spritzkühlung 17 der Fig. 2a dargestellt nur die Unterseite des Vorbandes 5 durch ein dort angeordnetes Kühlband 19 und/oder wahlweise auch die Vor- bandoberseite durch ein auf der Oberseite des Vorbandes 5 angeordnetes weiteres Kühlband 19' gekühlt werden.An alternative cooling of the pre-strip 5 in the form of a closed cooling is shown in FIG. 2b. This cooling, which also takes place only in a defined area immediately behind the deflection roller 8, is performed with a circulating cooling belt 19, 19 '. 2a, only the underside of the pre-strip 5 can be cooled by a cooling belt 19 arranged there and / or optionally also the upper side of the pre-belt by a further cooling belt 19 'arranged on the upper side of the pre-belt 5.
Zur besseren Anschaulichkeit der erfindungsgemäßen Druckbeaufschlagung des Gussproduktes 4 ist in den folgenden Abbildungen 3 bis 6 die Bandgießan- läge 1 der Figuren 1 und 2 in einer perspektivischen Draufsicht dargestellt.For better clarity of the pressurization of the cast product 4 according to the invention, the strip casting machine 1 of FIGS. 1 and 2 is shown in a perspective plan view in FIGS. 3 to 6.
Die Figur 3a zeigt beispielhaft einen Teil der Bandgießanlage 1 von der Verteilerrinne 3 / Schmelzenaufgabesystem 3' bis zum Ende des Metalltransportbandes 7 nach dem Stand der Technik. Auf dem Metalltransportband 7, auf dem sich der Bandanfang eines Gussproduktes 4 befindet, sind verschiedene Querschnittlinien A, B, C eingezeichnet. Die Linie „A" stellt einen Querschnitt durch das Gussprodukt 4 in der vorderen Hälfte des Metalltransportbandes 7 dar, die Linie „B" stellt einen Querschnitt durch das Gussprodukt 4 am Ende des Metalltransportbandes 7 und die Linie „C" stellt einen Querschnitt durch das erstarrte Vorband 5 dar, das nach Verlassen des Metalltransportbandes 7 auf einem Rollgang T aufliegt. Bei einer Bandgießanlage 1 nach dem Stand der Technik löst sich das Gussprodukt 4 von seiner Unterlage, dem Metalltransportband 7, und wölbt sich mit seinen Bandkanten 6 stetig auf. Diese Verwölbung beginnt in Form eines keilförmigen Aufwölbungsbereichs 18 mit steigendem Betrag etwa im Bereich der Querschnittlinie „A", so dass sich schließlich nach Verlassen des Metalltransportbandes 7 (im Bereich der Querschnittlinie „C") der eingezeichne- te Endzustand einstellt.FIG. 3 a shows by way of example a part of the strip casting installation 1 from the distribution channel 3 / melt delivery system 3 'to the end of the metal transport strip 7 according to the prior art. On the metal conveyor belt 7, on which the strip beginning of a cast product 4 is located, different cross-sectional lines A, B, C are shown. The line "A" represents a cross section through the cast product 4 in the front half of the metal conveyor belt 7, the line "B" shows a cross section through the cast product 4 at the end of the metal conveyor belt 7 and the line "C" represents a cross section through the solidified Preband 5, which rests on a roller table T after leaving the metal conveyor belt 7. In a strip casting machine 1 according to the prior art the cast product 4 dissolves from its base, the metal conveyor belt 7, and bulges steadily with its band edges 6. This warping begins in the form of a wedge-shaped curvature region 18 with an increasing amount approximately in the region of the cross-section line "A", so that finally, after leaving the metal conveyor belt 7 (in the region of the cross-section line "C"), the drawn final state is established.
In der Figur 3b wird das in der Fig. 3a beschriebene Hochwölben des Bandes durch die sich bei den jeweiligen Querschnittlinien ergebenden Bandquerschnitten deutlicher dargestellt. Bei der Querschnittlinie „A" liegt das nicht völlig er- starrte Gussprodukt 4, bedingt durch seine Gewichtskraft und seine vorhandenen plastischen Eigenschaften mit vollständigem Kontakt noch auf seiner Unterlage, dem Metalltransportband 7, auf. Bei der Querschnittlinie „B" haben sich die Bandkanten 6 des nun nicht mehr plastischen Gussproduktes 4 vom Metalltransportband 7 gelöst, das Gussprodukt 4 besitzt jetzt einen leicht bogenförmi- gen Querschnitt. Bei der Querschnittlinie „C" ist die Verwölbung der Bandkanten 6 weiter fortgeschritten und der Querschnitt des vollständig erstarrten Vorbandes 5, das auf einem das Metalltransportband 7 verlängernden Rollgang 7'aufliegt, hat in etwa die Form einer Regenrinne.In FIG. 3b, the high arching of the band described in FIG. 3a is more clearly represented by the band cross sections resulting in the respective cross-sectional lines. In the case of the cross-sectional line "A", the cast product 4, which is not completely solidified, still rests on its underlay, the metal conveyor belt 7, due to its weight and its existing plastic properties with complete contact of the now no longer plastic cast product 4 detached from the metal conveyor belt 7, the cast product 4 now has a slightly curved cross-section. In the cross-section line "C", the warping of the strip edges 6 has progressed further and the cross-section of the fully solidified pre-strip 5 resting on a roller conveyor 7 'extending the metal conveyor belt 7 has approximately the shape of a rain gutter.
In der Figur 4a ist die durch die Verwendung einer im Bereich der Querschnittlinie „B" angeordneten Druckrolle 11 eintretende Änderung der Verwölbung der Bandkanten 6 dargestellt. Der Aufwölbungsbereich 18 der Bandkanten 6 beginnt erst ab der Querschnittlinie „B" mit deutlich verringertem absolutem Betrag. Die Druckrolle 11 wirkt demnach mit einem das Hochwölben der Bandkan- ten 6 unterdrückenden Effekt auch rückwärts bis zurück in den Bereich der Querschnittlinie „A". Das weitere vorwärts gerichtete Hochwölben der Bandkanten 6 bis zur Querschnittlinie „C" lässt sich zwar durch die Druckrolle 11 nicht völlig unterdrücken, ist aber deutlich niedriger als bei der Fig. 3a ohne Druckrolle 11. Die Aufgabe der Erfindung, einen vollständigen Kontakt des Gussproduk- tes 4 mit seiner Unterlage, dem Metalltransportband 7 zu gewährleisten, wird somit durch den Einsatz der Druckrolle 11 vollständig erfüllt. Die sich durch den Einsatz der Druckrolle 11 bei den entsprechenden Querschnittlinien ergebenden Bandquerschnitte sind in der Figur 4b dargestellt. Wie auch ohne Druckrolle 11 liegt bei der Querschnittlinie „A" das Gussprodukt 4 flach auf dem Metalltransportband 7 auf, aber auch bei der an das Ende des Metalltransportbandes 7 gelegten Querschnittlinie „B". Erst nach Verlassen des Metalltransportbandes 7 ergibt sich dann eine geringe Bandkantenverwölbung, die aber durch die erfindungsgemäße zusätzliche Kühlung der Vorbandunterseite ausgeglichen werden kann.4a shows the change in the warping of the band edges 6 which occurs as a result of the use of a pressure roller 11 arranged in the region of the cross-section line "B." The bulge region 18 of the band edges 6 only begins with a significantly reduced absolute value starting from the cross-section line "B". The pressure roller 11 thus also acts backwards with respect to the cross-section line "A" with an effect suppressing the bulging of the band edges 6. The further upward bending of the band edges 6 to the cross-sectional line "C" can indeed be achieved by the pressure roller 11 is not completely suppress, but is significantly lower than in Fig. 3a without pressure roller 11. The object of the invention, a complete contact of the cast product 4 with its base to ensure the metal conveyor belt 7, thus by the use of the pressure roller 11 is complete Fulfills. The resulting by the use of the pressure roller 11 at the corresponding cross-sectional lines band cross sections are shown in Figure 4b. As with the pressure roller 11, in the case of the cross section line "A", the cast product 4 lies flat on the metal conveyor belt 7, but also in the cross section line "B" laid at the end of the metal conveyor belt 7. Only after leaving the metal conveyor belt 7 then results in a low Bandkantengewölbung, but can be compensated by the inventive additional cooling of the Vorbandunterseite.
In der Figur 5 sind als Alternative zur Druckrolle 11 im gleichen Bereich am Ende des Metalltransportbandes 7 Teildruckrollen 12 als Druckvorrichtung eingesetzt, die ausschließlich auf die Bandkanten 6 einwirken. Der durch diese Maßnahme erreichte Effekt ist, wie durch den eingezeichneten Aufwölbungsbereich 18 deutlich wird, mit der Wirkungsweise einer Druckrolle 11 durchaus ver- gleichbar.In the figure 5 7 partial pressure rollers 12 are used as a printing device as an alternative to the pressure roller 11 in the same area at the end of the metal conveyor belt, which act exclusively on the belt edges 6. The effect achieved by this measure is quite comparable to the mode of action of a pressure roller 11, as becomes clear from the indicated bulge area 18.
Eine weitere Alternative zu den Druckrollen 11 bzw. Teildruckrollen 12 besteht in der Verwendung eines Druckbandes 13, das entsprechend der Figur 6 auf einen größeren Bereich des Gussproduktes 4 mit Druck einwirkt. Der sich hier ergebende Aufwölbungsbereich 18 ist deshalb etwas kleiner als bei den vorher dargestellten Druckrollen 11 , 12.A further alternative to the pressure rollers 11 or partial pressure rollers 12 is the use of a pressure belt 13, which acts according to the figure 6 on a larger area of the cast product 4 with pressure. The bulge area 18 resulting here is therefore somewhat smaller than in the previously described pressure rollers 11, 12.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt, sondern kann bezüglich der angewendeten Druckvorrichtungen und Vorrichtun- gen zur zusätzlichen Kühlung auch mit von der Beschreibung abweichenden Aggregaten durchgeführt werden, wenn das erfindungsgemäße Verfahren auch hiermit möglich ist. BezugszeichenlisteThe invention is not limited to the exemplary embodiments shown, but can also be carried out with respect to the applied printing devices and devices for additional cooling with deviating from the description of aggregates, if the inventive method is also hereby possible. LIST OF REFERENCE NUMBERS
1 Bandgießanlage1 strip casting plant
2 Gießmaschine 2' Gießpfanne2 casting machine 2 'ladle
3 Verteilerrinne3 distributor trough
3' Schmelzenaufgabesystem3 'melt delivery system
4 Gussprodukt4 cast product
5 Vorband 6 Bandkanten des Vorbandes5 Prelude 6 Band edges of the prelude
7 Metalltransportband7 metal conveyor belt
7' Rollgang nach dem Metalltransportband7 'roller table after the metal conveyor belt
8, 9 Umlenkrolle8, 9 pulley
10 Spannrolle 11 Druckrolle10 tension roller 11 pressure roller
12 Teildruckrolle12 partial pressure roller
13 Druckband13 print tape
14 Glatt-/ Treib-Rollen14 smooth / drive rollers
15 Dammblockkette 16 Treiber15 dam block chain 16 drivers
17 offene Kühlvorrichtung (Spritzkühlung)17 open cooling device (spray cooling)
18 Aufwölbungsbereich18 bulge area
19 geschlossene Kühlvorrichtung (unterhalb umlaufendes Kühlband) 19' geschlossene Kühlvorrichtung (oberhalb umlaufendes Kühlband)19 closed cooling device (below circulating cooling belt) 19 'closed cooling device (above circulating cooling belt)
A Querschnitt durch das Gussprodukt in der vorderen Hälfte des MetalltransportbandesA Cross section through the cast product in the front half of the metal conveyor belt
B Querschnitt durch das Vorband am Ende des Metalltransportbandes C Querschnitt durch das Vorband nach Verlassen des Metalltransportbandes B Cross-section through the pre-strip at the end of the metal conveyor belt C Cross-section through the pre-strip after leaving the metal conveyor belt

Claims

Patentansprüche claims
1. Verfahren zum endabmessungsnahen Gießen von rechteckigen Strängen aus Metall und anschließender Weiterverarbeitung zu Metallbändern nach dem DSC-Verfahren (Direct Strip Casting) in einer horizontalen Bandgießanlage (1 ), wobei die Metallschmelze mittels eines Schmelzenaufgabesys- tems (31) auf ein an der Unterseite gekühltes horizontal umlaufendes Me- talltransportband (7) gegossen wird und das flüssige Gussprodukt (4) auf diesem Metalltransportband (7) während seines Transports zu Vorband (5) erstarrt, welches dann nach Verlassen des Metalltransportbandes (7) - beispielsweise durch Glatt-/ Treib-Rollen (14) mechanisch eingespannt - zu einem Treiber (16) gefördert wird, dadurch gekennzeichnet, dass zur Vermeidung eines bis in den Ausgießbereich der Gießmaschine (2) möglichen rückwärtigen Aufwölbens der Bandkanten (6) und zur Vergleichmäßigung des Wärmeübergangs auf das Gussprodukt (4) während seiner Erstarrung auf dem Metalltransportband (7) folgende Verfahrens- schritte miteinander kombiniert werden:1. A method for close-to-near-net casting of rectangular metal strands and subsequent further processing to metal strips by the DSC process (direct strip casting) in a horizontal strip casting plant (1), wherein the molten metal by means of a Schmelzenaufgabesys- (3 1 ) on the at Bottom cooled cooled horizontally circulating metal transport belt (7) is poured and the liquid cast product (4) solidifies on this metal conveyor belt (7) during its transport to Vorband (5), which then after leaving the metal conveyor belt (7) - for example, by smooth / Drive rollers (14) mechanically clamped - to a driver (16) is conveyed, characterized in that to avoid a possible upwards in the pouring of the casting machine (2) rear bulging of the strip edges (6) and to homogenize the heat transfer to the cast product (4) During its solidification on the metal conveyor belt (7), the following procedure - steps are combined with each other:
a) Herstellung eines maximalen Kontakts des Gussproduktes (4) auf dem Metalltransportband (7), wozu eine oberhalb des Vorbandes (5) im Bereich des in Gießrichtung flussabwärts befindlichen Ende des Metalltransportbandes (7) angeordnete Druckvorrichtung (11 , 12, 13) von oben auf das zum Vorband (5) erstarrende Gussprodukt (4), vorzugsweise auf dessen Bandkanten (6) gedrückt wird, unda) production of a maximum contact of the cast product (4) on the metal conveyor belt (7), including a above the pre-strip (5) in the region of the downstream in the casting direction end of the metal conveyor belt (7) arranged printing device (11, 12, 13) from above on the solidification of the pre-strip (5) cast product (4), preferably on the band edges (6) is pressed, and
b) Kompensierung der bei Verlassen des Metalltransportbandes (7) schlagartig verringerten Kühlung der Unterseite des Vorbandes (5), wozu in einem definierten Bereich unmittelbar hinter dem Metall- transportband (7) die Unterseite und wahlweise gleichzeitig die Oberseite des Vorbandes (5), wahlweise über die gesamte Breite, zusätzlich gekühlt wird.b) Compensation of when leaving the metal conveyor belt (7) abruptly reduced cooling of the underside of the pre-strip (5), including in a defined area immediately behind the metal transport belt (7) the underside and optionally simultaneously the top of the pre-strip (5), optionally over the entire width, additionally cooled.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Druckvorrichtung eine auf die gesamte Breite des Gussproduktes 4 einwirkende Druckrolle (11 ) verwendet wird.2. The method according to claim 1, characterized in that as a pressure device acting on the entire width of the cast product 4 pressure roller (11) is used.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Druckvorrichtung jeweils auf die Bandkanten (6) des Gussproduktes 4 einwirkende Teildruckrollen (12) verwendet werden.3. The method according to claim 1, characterized in that as a printing device in each case on the band edges (6) of the cast product 4 acting partial pressure rollers (12) are used.
4. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Druckvorrichtung ein auf die gesamte Breite des Gussproduktes 4 einwirkendes umlaufendes Druckband (13) verwendet wird.4. The method according to claim 1, characterized in that as a printing device acting on the entire width of the cast product 4 circumferential pressure belt (13) is used.
5. Verfahren nach Anspruch, 2, 3, oder 4, dadurch gekennzeichnet, dass die Druckvorrichtungen (11 , 12, 13) separat angetrieben und gekühlt werden.5. The method of claim 2, 3 or 4, characterized in that the printing devices (11, 12, 13) are driven and cooled separately.
6. Verfahren nach Anspruch 1 , 2, 3, 4 oder 5, dadurch gekennzeichnet, dass sich der definierte Bereich der zusätzlichen Kühlung der Unterseite und der wahlweise gleichzeitigen Kühlung der Oberseite des Vorbandes (5) bei Vorhandensein von Glatt-/ Treib-Rollen (14) wahlweise bis zu diesen Glatt-/ Treib-Rollen (14) hin erstreckt.6. The method according to claim 1, 2, 3, 4 or 5, characterized in that the defined area of the additional cooling of the underside and the optionally simultaneous cooling of the upper side of the pre-strip (5) in the presence of smooth-running rollers (14) optionally extends as far as these smooth-running rollers (14).
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die zusätzliche Kühlung durch eine offene Spritzkühlung (17) und/oder durch eine geschlossene Kühlung mittels eines umlaufenden Kühlbandes (19, 191) durchgeführt wird.7. The method according to claim 6, characterized in that the additional cooling by an open spray cooling (17) and / or by a closed cooling means of a circulating cooling belt (19, 19 1 ) is performed.
8. Vorrichtung zum endabmessungsnahen Gießen von rechteckigen Strängen aus Metall und anschließender Weiterverarbeitung zu Metallbändern nach dem DSC-Verfahren (Direct Strip Casting) in einer horizontalen8. Device for near-net-shape casting of rectangular strands of metal and subsequent further processing to metal strips by the DSC process (direct strip casting) in a horizontal
Bandgießanlage (1 ), wobei die Metallschmelze mittels eines Schmelzen- aufgabesystems (3') auf ein an der Unterseite gekühltes horizontal umlaufendes Metalltransportband (7) gegossen wird und das flüssige Gussprodukt (4) auf diesem Metalltransportband (7) während seines Transports zu Vorband (5) erstarrt, welches dann nach Verlassen des Metalltransportbandes (7) - beispielsweise durch Glatt-/ Treib-Rollen (14) mechanisch eingespannt - zu einem Treiber (16) gefördert wird, insbesondere zur Durchführung des Verfahrens nach den vorhergehenden Ansprüchen, gekennzeichnet durch:Strip casting plant (1), wherein the molten metal is poured by means of a melt delivery system (3 ') onto a horizontally circulating metal conveyor belt (7) cooled on the underside and the liquid cast product (4) is transported on this metal conveyor belt (7) during its transport to 5), which is then conveyed to a driver (16) after leaving the metal conveyor belt (7), mechanically clamped, for example, by smooth-running rollers (14), in particular for carrying out the method according to the preceding claims, characterized by:
a) eine oberhalb des Gussproduktes (4) im Bereich der in Gießrichtung flussabwärts befindlichen Umlenkrolle (8) des Metalltransportbandes (7) angeordnete gekühlte Druckvorrichtung (11 , 12, 13), die mit einem einstellbaren Druck von oben auf das zum Vorband (5) erstar- rende Gussprodukt (4), vorzugsweise auf dessen Bandkanten (6) einwirkbar ausgebildet ist, und b) eine zur Kühlung der Unterseite und wahlweise gleichzeitig der Oberseite des Vorbandes (5) über dessen gesamte Breite unmittelbar hinter dem Metalltransportband (7) angeordnete Kühlvorrichtung (17, 19, 19").a) one above the cast product (4) in the region of the downstream in the casting direction deflection roller (8) of the metal conveyor belt (7) arranged cooled pressure device (11, 12, 13) with an adjustable pressure from the top of the to the pre-strip (5) solidifying cast product (4), preferably on the band edges (6) is formed einwirkbar, and b) one for cooling the bottom and optionally simultaneously the top of the pre-strip (5) over its entire width immediately behind the metal conveyor belt (7) arranged cooling device (17, 19, 19 ").
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Druckvorrichtung eine auf die gesamte Breite des Gussproduktes (4) einwirkende angetriebene Druckrolle (11) ist.9. Apparatus according to claim 8, characterized in that the printing device is a on the entire width of the cast product (4) acting driven pressure roller (11).
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Druckvorrichtung jeweils eine auf eine Bandkante des Gussproduktes (4) einwirkende Teildruckrolle (12) ist.10. The device according to claim 8, characterized in that the printing device in each case one on a band edge of the cast product (4) acting partial pressure roller (12).
11. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Druckvorrichtung ein auf die gesamte Breite des Gussproduktes (4) einwirkendes umlaufendes Druckband (13) ist.11. The device according to claim 8, characterized in that the printing device is a on the entire width of the cast product (4) acting circumferential pressure belt (13).
12. Vorrichtung nach Anspruch 8, 9, 10 oder 11 , dadurch gekennzeichnet, dass die Kühlwirkung der Kühlvorrichtung (17, 19, 19') sich über einen definierten Bereich hinter dem Metalltransportband (7) erstreckt und bei Vorhandensein von Glatt-/ Treib-Rollen (14) wahlweise bis zu diesen reicht. 12. The device according to claim 8, 9, 10 or 11, characterized in that the cooling effect of the cooling device (17, 19, 19 ') extends over a defined area behind the metal conveyor belt (7) and in the presence of smooth / Treib- Rolls (14) optionally up to these ranges.
13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass die Kühlvorrichtung (17) in Form einer offenen Spritzkühlung (17) und/oder in Form einer geschlossenen Kühlung mittels eines unterhalb und wahlweise oberhalb des Vorbandes 5 umlaufenden Kühlbandes (19,13. The apparatus according to claim 12, characterized in that the cooling device (17) in the form of an open injection cooling (17) and / or in the form of a closed cooling by means of a below and optionally above the pre-strip 5 circulating cooling belt (19,
19') ausgebildet ist. 19 ') is formed.
EP08785302.4A 2007-08-04 2008-08-01 Method and device for equalization of the heat transfer of a cast product during the solidification thereof on a metal conveyor belt of a horizontal strip casting system Active EP2176016B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007036969 2007-08-04
DE102007054554 2007-11-15
DE102007057278A DE102007057278A1 (en) 2007-08-04 2007-11-28 Method and apparatus for equalizing the heat transfer of a cast product during its reimbursement on the metal conveyor belt of a horizontal strip caster
PCT/EP2008/006362 WO2009018973A1 (en) 2007-08-04 2008-08-01 Method and device for equalization of the heat transfer of a cast product during the solidification thereof on a metal conveyor belt of a horizontal strip casting system

Publications (2)

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EP2176016A1 true EP2176016A1 (en) 2010-04-21
EP2176016B1 EP2176016B1 (en) 2017-05-10

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EP08785302.4A Active EP2176016B1 (en) 2007-08-04 2008-08-01 Method and device for equalization of the heat transfer of a cast product during the solidification thereof on a metal conveyor belt of a horizontal strip casting system

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US (2) US8272426B2 (en)
EP (1) EP2176016B1 (en)
JP (1) JP5289436B2 (en)
KR (1) KR101185393B1 (en)
CN (1) CN101772388B (en)
CA (1) CA2693895C (en)
DE (1) DE102007057278A1 (en)
WO (1) WO2009018973A1 (en)

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US20110253339A1 (en) 2011-10-20
JP2010533590A (en) 2010-10-28
US8261812B2 (en) 2012-09-11
CN101772388B (en) 2015-04-29
EP2176016B1 (en) 2017-05-10
CN101772388A (en) 2010-07-07
CA2693895C (en) 2011-10-11
DE102007057278A1 (en) 2009-02-05
CA2693895A1 (en) 2009-02-12
WO2009018973A1 (en) 2009-02-12
JP5289436B2 (en) 2013-09-11
KR101185393B1 (en) 2012-09-25
KR20100017953A (en) 2010-02-16
US8272426B2 (en) 2012-09-25
US20100132911A1 (en) 2010-06-03

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