EP1340565B1 - Dispositif de coulée continue d'une bande à partir d'un métal liquide - Google Patents

Dispositif de coulée continue d'une bande à partir d'un métal liquide Download PDF

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Publication number
EP1340565B1
EP1340565B1 EP03001818A EP03001818A EP1340565B1 EP 1340565 B1 EP1340565 B1 EP 1340565B1 EP 03001818 A EP03001818 A EP 03001818A EP 03001818 A EP03001818 A EP 03001818A EP 1340565 B1 EP1340565 B1 EP 1340565B1
Authority
EP
European Patent Office
Prior art keywords
cast
casting
strip
rollers
cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03001818A
Other languages
German (de)
English (en)
Other versions
EP1340565A3 (fr
EP1340565A2 (fr
Inventor
Wilhelm Dipl.Ing. Mankau
Werner Dipl.Ing. Schümers
Guido Dr.Ing. Stebner
Manfred Dr.-Ing. Walter
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.)
Outokumpu Nirosta GmbH
Original Assignee
ThyssenKrupp Nirosta GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Nirosta GmbH filed Critical ThyssenKrupp Nirosta GmbH
Publication of EP1340565A2 publication Critical patent/EP1340565A2/fr
Publication of EP1340565A3 publication Critical patent/EP1340565A3/fr
Application granted granted Critical
Publication of EP1340565B1 publication Critical patent/EP1340565B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—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
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • 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
    • B22D11/0637—Accessories therefor
    • B22D11/0697—Accessories therefor for casting in a protected atmosphere

Definitions

  • the invention relates to a device for the continuous casting of molten metal, in particular molten steel, to cast strip.
  • molten metal in particular molten steel
  • designated devices are each two during the casting counter-rotating, axially parallel arranged and internally cooled casting rolls present, which limit the longitudinal sides of a casting gap formed between them.
  • so much liquid melt is poured into this casting gap that a melt sump is formed above the casting gap.
  • the melt coming from this sump onto the casting rolls solidifies and is conveyed by the casting rolls into the casting gap.
  • the cast strip is formed from the shells thus formed on the casting rolls and still free-flowing melt, which is then removed and fed to further processing.
  • the cast strip Since the cast strip has high temperatures when it leaves the casting gap, scale forms on its surface in contact with the environment in large quantities of scale. This scale hinders the continuous processing of the tape. In particular, the tinder influences that Work result in the hot rolling continuously performed on the casting of the strip negative.
  • the EP 0 830 223 B1 has been proposed, in conjunction with a complete enclosure to cool the cast strip on leaving the casting gap contactless, in order to avoid contact of the strip at high temperatures with the environment.
  • the side walls of the housing run towards each other in a funnel shape, so that the cast strip passes through a narrowed passage opening into the subsequently traversed space of the enclosure.
  • the funnel-shaped converging walls are in this case occupied by cooling elements which are intended to effect the desired cooling of the strip emerging from the casting gap.
  • the radiated heat from the cast strip and the gases forming on it pass unimpeded to the casting rolls and their storage and their drive required, surrounded by the housing components.
  • the invention had for its object to provide a device of the type described above, in which the load is reduced by emitted from the cast strip heat.
  • molten metal in particular molten steel
  • molten metal is cast into a cast strip in that the molten metal is poured into a strip in a casting gap formed between two casting rolls which rotate in opposite directions in the casting operation and transported away via a conveying path, wherein the cast strip as it leaves the casting gap, similar to the prior art, passes through a cooling zone in which a temperature lower than the temperature of the gases heated by the cast strip is maintained.
  • a zone is formed close to the outlet region of the casting gap, in which a targeted lowering of the temperature is brought about.
  • the natural, thermally induced flow (“chimney effect") is interrupted in which the gases heated by the cast strip during its transport via the conveying path ascend counter to the conveying direction of the strip.
  • the cooling zone forms a barrier which prevents the hot gases heated by the strip from reaching the components required to support the rolls.
  • the effect of the cooling zone is assisted in a device according to the invention in that it is bounded by a pointed roof-shaped G manwalzenabtubung.
  • this shielding constitutes a physical obstacle by which the flow of hot gases to the rollers or to a work platform, for example in the area of the rollers, is interrupted.
  • the G manwalzenabtubung is available for targeted cooling of existing in its bounded space gases available.
  • the one at Shielding according to the invention allows in this way a particularly effective protection of the casting rolls, the components required for their storage and their operation, and all other aggregates arranged in the vicinity of the casting rolls.
  • the G confusewalzenabtubung combined with the inventive cooling of the gases in the cooling zone leads to a significant reduction in the risk of personnel employed in the casting rolls.
  • the formation of a cooling zone in the area bounded by the G manwalzenabprocessung can be generated, for example, characterized in that at least one of the walls of the G confusewalzenabprocessung is fluid cooled.
  • the cooled wall may have at least one cooling passage through which the cooling fluid flows during the casting operation.
  • liquid cooling ensures that the heat acting on the casting roll shield is dissipated quickly and effectively.
  • the cooling of the casting roll shield results in intense cooling of the gases impinging on the casting roll shield. These cooled gases mix with the hot gases flowing in the area bounded by the casting roll shield, so that they too are cooled and a zone of lower temperature is established.
  • the formation of the cooling zone can also be particularly effectively supported by the fact that at least one device for injecting cooling gas in the Cooling zone is provided.
  • the effect of the cooling gas can be further improved by the fact that the flow of the injected into the cooling zone cooling gas is directed against the flow direction of the heated strip from the cast gas.
  • Such an orientation of the cooling gas flow leads to an intense mixing of the hot gases with the cooling gases, so that within a short time a particularly effective cooling zone constructed and the rise of hot gases on the G confusewalzenabtubung addition is particularly safe prevented.
  • the effectiveness of the cooling gas flow can be increased further by sweeping over the surface of the cast strip.
  • the cooling of the strip achieved in the region of the cooling zone reduces the amount of scale formed on the strip surface during the transport of the strip.
  • the formation of scale can be further suppressed in such cases in which a cooling gas is blown into the cooling area, in that an inert gas is used as the cooling gas.
  • an inert gas is used as the cooling gas.
  • the casting roll shield extends in a pointed roof shape into the space defined below the casting gap by the casting rolls, an embodiment optimized with regard to its protective effect of the casting roll shield itself is achieved.
  • the inlet opening for carrying out the cast strip emerging from the casting gap is preferably formed in the ridge region of the casting roll shield.
  • the edges of the inlet opening of the casting roll shield axially parallel to the casting rolls at a small distance from the casting rolls.
  • the casting roll shield provided according to the invention, in the region of the casting rolls, only a lateral boundary of the cooling zone is formed, while its upper boundary is formed by the casting rolls themselves.
  • the cross-sectional area of the inlet opening of the casting roll shield is adapted as closely as possible to the cross section of the cast strip. Even in this way, the escape of gases from the inlet opening can be effectively hindered.
  • nozzles are present in the region of the inlet opening, from which emerges in the casting operation, a gas stream, which counteracts the escape of gas from the inlet opening.
  • a gas stream which counteracts the escape of gas from the inlet opening.
  • the G manwalzenabtubung is supported by a bearing of the casting rolls supporting, transportable from a working position to a waiting frame.
  • the frame with the rollers and the G manwalzenabtubung can be exchanged as a complete unit at a roll change.
  • the casting roll shield and the aggregates provided, for example, for cooling the walls of the casting roll shield and for injecting the cooling gases onto the casting roll shield.
  • an enclosure which at least partially surrounds the conveying path of the cast strip, then it is favorable if the cast roll shield is placed on such a housing or is part of such an enclosure.
  • the enclosure preferably encloses the conveying path of the cast strip at least up to a first pair of rolls arranged in the conveying path for conveying or hot rolling the strip.
  • the casting roll shield forms part of an enclosure, it is advantageous in view of the possibility of simple, regular maintenance if the casting roll shield is detachably connected to the enclosure. This is especially true when the G manwalzenabtubung is connected in the manner already mentioned with a transportable frame. It should be present between the G manwalzenabtubung and the housing a seal. Such a seal, which at the same time withstands the thermal stresses in the region of the casting device, can be accomplished in that it is in the form of a sand-filled channel in which the G confusewalzenabtubung stands with its lower edge.
  • the load on the units and components of the casting device can also be further reduced by the fact that a suction device for sucking the heated of the cast strip gases is present.
  • the housing may have a suction opening to which the suction device is connected.
  • the apparatus 1 for pouring a molten steel into a cast steel strip B has two casting rolls 2, 3 arranged parallel to one another and rotating in opposite directions, which delimit the longitudinal sides of a casting gap 4 formed between them and the melt sump 5 arranged above them, into which the molten steel is introduced ,
  • the two lateral, of the casting rolls 2.3 free transverse sides of the casting gap 4 and the melt sump 5 are each sealed by side seals not shown here in detail.
  • the casting rolls 2, 3 are continuously cooled by a stream of cooling water.
  • the cast steel strip B withdrawn from the casting gap 4 is transported via a conveying path 6 to a hot rolling stand 7 in which it is hot-rolled continuously to form a hot strip W having a certain final thickness.
  • the conveying path 6 has a first section extending essentially vertically from the casting gap 4, which then merges in an arc into a second section extending essentially horizontally to the hot rolling stand 7.
  • the conveying path 6 is up to the hot rolling stand 7 substantially completely surrounded by a housing 8, which shields him from the environment so that only the hot rolled hot strip W comes in direct contact with the ambient air outside the housing 8.
  • the upper part of the housing 8 associated with the casting rolls 2, 3 is formed by a casting roll shield 9, which is detachably placed on the upper edge of the main part 10 of the housing 8 which is substantially larger than the casting roll shield 9.
  • a sand-filled groove 11 is formed on the upper edge of the main part 10, in which the Gellowalzenabtubung 9 sits with its main part 10 associated lower edge region.
  • Both the G confusewalzenabplinung 9 and the main part 10 of the housing 8 are lined on the conveying path 6 associated inner sides with a layer 13 of refractory material.
  • a layer 13 of refractory material By the layer 13, on the one hand, the thermal load on the existing example of steel outer wall of the enclosure is reduced.
  • the layer 13 also forms an insulation, by means of which the heat radiation acting on the environment from the enclosure 8 is reduced.
  • the G confusewalzenableung 9 is pointed roof-shaped in such a way that their respective casting rolls 2.3 associated walls 9a, 9b pointed in the direction of the casting gap 4 are formed tapering towards each other and extend to just below the casting rolls 2.3.
  • the G confusewalzenableung 9 In its the main part 10 of the housing associated edge region, the G manwalzenableung 9 has a frame portion of low height, with which it sits in the groove 11.
  • the housing 8 and with it the G confusewalzenableung 9 thereby extend laterally beyond the width of the cast steel strip B, wherein the enclosure is closed in its over the width of the casting rolls 2,3 protruding part.
  • part 9 cooling channels 14 are formed in the walls 9a, 9b of the Gellowalzenabcapung through which in the casting operation also continuously a cooling water flow is passed. In this way, the walls 9a, 9b are cooled at least as well as the casting rolls 2, 3 (FIG. Fig. 2 ).
  • an inlet opening 15 is formed in the casting roll shield 9, through which the cast steel strip B is led into the enclosure 8.
  • the upper, formed on the frame portion edges 16,17 of this inlet opening 15 are axially parallel and at a small distance to the casting rolls 2,3.
  • On the edges 16,17 each flat jet nozzles 18,19 are arranged, from which in the manner of an air knife inert gas is blown against the respective casting roll 2 and 3 respectively. In this way, a contactless sealing of the existing between the upper edges 16,17 and the casting rolls 2,3 gap at the same time unrestricted mobility of the casting rolls 2,3 made by the the penetration of ambient air into the housing 8 is prevented ( Fig. 1 ).
  • the G confusewalzenabtubung 9 carries on the interior 12 of the housing 8 associated side of its walls 9a, 9b respectively nozzles 20,21, from which in the casting operation each consisting of an inert gas or a mixture of an inert gas and a reducing gas gas stream G in the Interior 12 of the enclosure 8 is blown.
  • the nozzles 20,21 are aligned such that at least a portion of the gas flow G exiting them sweeps over the surface of the cast steel strip B.
  • an opening is formed in a side wall of the housing 8, to which a suction pipe leading to a suction device, not shown, is connected.
  • the G tellwalzenableung 9 is attached to a frame 23 which carries the casting rolls 2,3 and other, not shown here aggregates, which are needed for supplying and for driving the casting rolls 2,3.
  • the frame 23 can be transported with its supported casting rollers 2,3, the G collectwalzenableung 9 and the other units from its working position shown in the figures in a standby position, not shown, are carried out in the maintenance.
  • the cast steel strip B is continuously withdrawn from the casting gap 4 and also continuously via the conveying path 6 to the hot rolling mill 7 promoted.
  • the housing 8 prevails in the housing 8 an inert gas atmosphere by which the formation of scale on the surface of the cast steel strip B is suppressed.
  • the gas coming into contact with the hot cast strip, contained in the enclosure 8, is heated and rises as hot gas flows T as a result of its temperature increase counter to the direction of conveyance F in the enclosure 8.
  • the formation of the cooling zone K which is bounded by the casting roll shield 9, in the immediate vicinity of the casting rolls 2, 3 prevents the hot gas stream T from heating the frame 23 and the assemblies and devices attached to it or endangering the persons employed by the device 1 ,
  • the continuous cooling of the walls 9a, 9b of the casting roll shield ensures that, despite the heat radiation emitted by the cast steel strip, they are so little thermally stressed that they retain their shape even during the casting operation. In this way, a permanently tight seal between the casting rolls 2, 3 and the edges 16, 17 of the outlet opening 15 is ensured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)

Claims (22)

  1. Dispositif pour la coulée de bains de fusion métalliques, en particulier d'acier liquide, en feuillard coulé (B),
    - avec des cylindres de coulée (2, 3) tournant à l'opposé l'un de l'autre en service de coulée, qui limitent les côtés longitudinaux d'une fente de coulée (4) formée entre eux,
    - avec une voie de transport (6) pour le transport du feuillard (B) coulé, sortant de la fente de coulée (4),
    - avec une zone de refroidissement (K), formée au dessous de la fente de coulée (4), dans laquelle règne, pendant le service de coulée, une température qui est plus élevée que la température des gaz chauffés par le feuillard coulé (B), caractérisé en ce que la zone de refroidissement (K) est formée dans un écran de protection des cylindres de coulée (9) en forme de toit pointu, dans lequel le feuillard (B), sortant de la fente de coulée (4), s'engage par une ouverture d'entrée (15), et dont les parois (9a, 9b), orientées le long des cylindres de coulée (2, 3), s'étendent, dirigées en pointe l'une vers l'autre, en direction de la fente de coulée (4), dans un espace limité par les cylindres de coulée (2, 3), qui est situé sous la fente de coulée (4).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'écran de protection des cylindres de coulée (9) est disposé sous les cylindres de coulée (2, 3), dans la direction de transport du feuillard coulé (B).
  3. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'une des parois (9a, 9b) de l'écran de protection des cylindres de coulée (9) est refroidie par un fluide.
  4. Dispositif selon la revendication 3, caractérisé en ce que la paroi refroidie (9a, 9b) présente au moins un canal de refroidissement (14) dans lequel coule le fluide de refroidissement pendant le service de coulée.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'au moins un dispositif (20, 21) est prévu pour le soufflage de gaz de refroidissement (G) dans la zone de refroidissement (K).
  6. Dispositif selon la revendication 5, caractérisé en ce que le courant du gaz de refroidissement (G), insufflé dans la zone de refroidissement (K), est dirigé à l'opposé de la direction du courant de gaz (T) chauffé par le feuillard coulé.
  7. Dispositif selon revendication 5 ou 6, caractérisé en ce que le gaz de refroidissement (G) insufflé lèche la surface du feuillard (B) coulé.
  8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que le gaz de refroidissement (G) est un gaz inerte.
  9. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que le gaz de refroidissement (G) est un gaz réducteur.
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la coupe transversale de l'ouverture d'entrée (15) de l'écran de protection des cylindres de coulée (9) est adaptée à la section transversale du feuillard coulé (B).
  11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que les bords (16, 17) de l'ouverture d'entrée (15), s'étendant à axe parallèle par rapport aux cylindres de coulée (2, 3), sont disposés à une faible distance des cylindres de coulée (2, 3).
  12. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, dans la zone de l'ouverture d'entrée (15), sont prévues des tuyères (18, 19), en particulier des tuyères à jet plan et / ou des tuyères à jet circulaire, par lesquelles, en service de coulée, sort un courant de gaz qui contrecarre la sortie de gaz par l'ouverture d'entrée (15).
  13. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'écran de protection des cylindres de coulée (9) s'étend, dans le sens de la largeur du feuillard coulé (B), latéralement par rapport aux cylindres de coulée (2, 3).
  14. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'écran de protection des cylindres de coulée (9) est portée par un cadre (23) qui soutient le palier des cylindres de coulée (2, 3) et peut être amené d'une position de travail à une position d'attente.
  15. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'écran de protection des cylindres de coulée (9) est revêtu d'un matériau réfractaire (11), sur sa face associée au feuillard coulé (B).
  16. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'écran de protection des cylindres de coulée (9) fait partie d'une enceinte (8) qui enveloppe, dans la direction de transport, la voie de transport (6) du feuillard coulé (B) sortant de la fente de coulée (4), au moins sur une section qui part de la zone de sortie de la fente de coulée (4).
  17. Dispositif selon la revendication 16, caractérisé en ce que l'enceinte (8) entoure la voie de transport (6) du feuillard coulé (B), au moins jusqu'à un premier dispositif (17) qui est installé dans la voie de transport (6) pour l'évacuation ou le laminage à chaud du feuillard (B).
  18. Dispositif selon revendication 16 ou 17, caractérisé en ce que l'écran de protection des cylindres de coulée (9) est relié de manière amovible à l'enceinte (8).
  19. Dispositif selon la revendication 18, caractérisé en ce qu'un joint d'étanchéité est prévu entre l'écran de protection des cylindres de coulée (9) et l'enceinte (8).
  20. Dispositif selon la revendication 19, caractérisé en ce que le joint d'étanchéité est réalisée sous la forme d'une goulotte (11) remplie de sable, dans laquelle est installé l'écran de protection des cylindres de coulée (9), par son bord inférieur.
  21. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, pour l'aspiration des gaz chauffés par le feuillard coulé (B), un dispositif d'aspiration est prévu.
  22. Dispositif selon la revendication 21, caractérisé en ce que l'enceinte (8) présente une ouverture d'aspiration (22), à laquelle est raccordé un dispositif d'aspiration.
EP03001818A 2002-02-27 2003-01-29 Dispositif de coulée continue d'une bande à partir d'un métal liquide Expired - Lifetime EP1340565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10208340A DE10208340B4 (de) 2002-02-27 2002-02-27 Vorrichtung zum kontinuierlichen Vergießen von Metallschmelze zu gegossenem Band
DE10208340 2002-02-27

Publications (3)

Publication Number Publication Date
EP1340565A2 EP1340565A2 (fr) 2003-09-03
EP1340565A3 EP1340565A3 (fr) 2005-02-16
EP1340565B1 true EP1340565B1 (fr) 2008-11-19

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ID=27675018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03001818A Expired - Lifetime EP1340565B1 (fr) 2002-02-27 2003-01-29 Dispositif de coulée continue d'une bande à partir d'un métal liquide

Country Status (4)

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EP (1) EP1340565B1 (fr)
AT (1) ATE414578T1 (fr)
DE (2) DE10208340B4 (fr)
PL (1) PL205707B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110170626B (zh) * 2019-06-20 2024-02-06 中冶赛迪工程技术股份有限公司 一种铸轧预冷浇注装置
CN111495971A (zh) * 2020-05-06 2020-08-07 义乌聚龙自动化科技有限公司 一种铝合金板连铸连轧设备和方法
CN118455469B (zh) * 2024-07-12 2024-12-03 唐山非晶科技有限公司 一种非晶带材用的喷带卷收一体机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9505870A (pt) * 1994-04-04 1996-02-21 Nippon Steel Corp Método e aparelho de fundição continua de cilindro duplo
AUPN101495A0 (en) * 1995-02-10 1995-03-09 Bhp Steel (Jla) Pty Limited Casting steel strip
AUPN872596A0 (en) * 1996-03-19 1996-04-18 Bhp Steel (Jla) Pty Limited Strip casting
EP0903190B1 (fr) * 1997-09-18 2003-04-16 Castrip, LLC Installation de coulée de bandes

Also Published As

Publication number Publication date
EP1340565A3 (fr) 2005-02-16
DE10208340A1 (de) 2003-09-11
DE10208340B4 (de) 2004-02-05
DE50310794D1 (de) 2009-01-02
PL358931A1 (en) 2003-09-08
ATE414578T1 (de) 2008-12-15
EP1340565A2 (fr) 2003-09-03
PL205707B1 (pl) 2010-05-31

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