EP0900609B1 - Tube plongeur pour introduire un métal fondu, à partir d'un récipient de coulée ou un récipient intermédiaire, dans une coquille - Google Patents

Tube plongeur pour introduire un métal fondu, à partir d'un récipient de coulée ou un récipient intermédiaire, dans une coquille Download PDF

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Publication number
EP0900609B1
EP0900609B1 EP98116587A EP98116587A EP0900609B1 EP 0900609 B1 EP0900609 B1 EP 0900609B1 EP 98116587 A EP98116587 A EP 98116587A EP 98116587 A EP98116587 A EP 98116587A EP 0900609 B1 EP0900609 B1 EP 0900609B1
Authority
EP
European Patent Office
Prior art keywords
flow
immersion
flow guide
cross
casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98116587A
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German (de)
English (en)
Other versions
EP0900609A1 (fr
Inventor
Markus Dr. Reifferscheid
Ingo Dipl.-Ing. Schuster
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 Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP0900609A1 publication Critical patent/EP0900609A1/fr
Application granted granted Critical
Publication of EP0900609B1 publication Critical patent/EP0900609B1/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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

Definitions

  • the invention immersion pouring tube for introducing molten steel from a pouring or intermediate container in one with broad and narrow side walls for Continuous casting of flat products provided mold
  • the immersion pouring tube is designed with a connectable to a casting or intermediate container Flow channel, with at least two relative to its central axis or relative to Center of gravity of its cross-sectional area arranged above a floor element Outlet openings, and with internal flow guide bodies, which differ from To extend wall areas of the immersion pouring tube against its central axis, whose flow cross-section from a rotationally symmetrical upper area steadily to a cross-section flattened in the lower area against the outlet openings to pass over.
  • Immersion pouring tubes should be in the mold for a uniform and low-turbulence distribution the melt.
  • immersion pipes have, for example, bottom and inner contour elements, which are used for the shock-free dismantling of the steel melt stream contained kinetic energy. Nevertheless, it happens many times to form a ram wave in front of the narrow side walls, connected with an irregular and unstable mold level.
  • Thin casting formats can wash out in the area of the outlet openings come on the still thin strand shell. Overall, these effects result to loss of quality, at least on the surface of a cast product.
  • the uneven melt distribution within the mold is caused by unstable Flow processes caused, for example, from asymmetrical flows of Melt on entry into the inflow opening of the immersion pouring tube through dynamic
  • a change is also observed preferred outlet opening, which causes recurring mold level fluctuations be brought about.
  • DE 41 42 447 C2 discloses an immersion pouring tube for introducing molten steel from a casting container into a mold consisting of one to the casting container subsequent piece of pipe that goes towards the narrow side walls of the mold enlarged in cross-section and at the lower end with a centrally located bottom piece is provided with outlet openings for the melt.
  • the inner wall of the cross section widen Part of the immersion nozzle together with the opposite Wall parts of the base piece form flow channels, the axes of which Immersion tube axis include an angle between 10 and 22 °, the smaller angles a distance between the narrow side walls of the mold of approx. 600 mm and the larger angle a distance from the narrow side walls of the mold 2000 mm and more is assigned and the distance between the broad side walls of the mold from each other is 50 to 100 mm.
  • This dip tube training is not suitable to prevent unstable flow processes in the mold.
  • an immersion tube made of refractory material through which molten metal flows into a mold.
  • To make a wave motion in the mold To be largely avoided by the incoming molten metal is in free cross section of the dip tube arranged an aperture ring.
  • the longitudinal section the aperture ring is designed and the aperture ring is arranged in the dip tube, that a laminar flow of the melt occurs below the aperture ring. It is thereby achieved that the molten metal calms down through the outlet opening of the dip tube flows into the mold.
  • the incoming molten metal should the metal melt already in the mold does not cause wave movements or stimulate vibrations. This should give the finished product a smooth surface and a quality improvement can be achieved. In practice, however emphasized that the effect of the aperture ring wears off.
  • Belgian patent application No. 792.540 discloses a dip tube for special Used in the continuous casting of an aluminum-iron alloy. there aluminum oxide is deposited on the walls, in extreme cases up to complete blockage of the channels.
  • the special immersion pouring tube are horseshoe-shaped based on an approximately circular cross-section Channels provided on its periphery, directed towards the center
  • Form wall parts in which channels are provided for the passage of a coolant are. Both the complicated shape and the attachment of cooling channels within the wall parts directed towards the center are for the Unsuitable for use in molten steel.
  • Japanese document JP 63 295 056 A relates to an immersion pouring tube which is molten Steel from a melt container with a slide closure into a Mold leads.
  • the immersion pouring tube there is a flow guide plate with which Flow turbulence when the melt flows into the mold can be avoided should.
  • the document WO 89 12 519 A shows immersion pouring tubes for molds in the pouring tube Have flow dividers for the melt, which from a melt vessel in the Mold is directed.
  • the flow divider directs the melt flow in such a way that At the outlet from the immersion pouring tube there are partial flows directed towards each other and in this way the kinetic flow energy is to be reduced.
  • DE 43 20 723 A1 shows an immersion nozzle, in particular for pouring thin slabs, whose lower pipe section has flow guide bodies, which differ from To extend wall area of the flow channel against the central axis. These serve on the one hand the stabilization of the shaped stone forming the flow channel and on the other hand, the division and orientation of the flow cross section of the Formstone flowing through the melt flow.
  • DE 34 44 228 C2 shows an immersion pouring tube with flow guide bodies, which in Dip tube are coiled, or run at an angle. This is supposed to be achieved be that the melt is already in the outlet area of the melt reservoir or in the feed area to the mold level in a direction rotating about the feed direction Movement is offset, and that by means of the generated rotation of the melt jet the melt in the mold into a circumferential around the longitudinal axis of the casting Movement.
  • the invention is based on the object specify an immersion pouring tube which has a melt distribution that is as uniform as possible results in the mold, with those with the flow control by plug or slide control generated non-uniform flow conditions and turbulence balances out, build-up of waves at the outlet into the mold, leaching avoids the still thin strand shell and thereby overall loss of quality prevented in the surface of the cast product and avoiding a complicated, costly and wear-prone design with economic means and the longest possible availability.
  • the object is achieved with the invention in a submerged pouring tube of the type mentioned in the preamble of claim 1 in that flow guide bodies are assigned to at least one of the areas (I 1 , I 2 ) and in that the height (h) of the flow guide bodies, starting from one upper area of the flow channel, in the wall area merges.
  • the design of the immersion pouring tube according to the invention is based on the knowledge that that the cause of an uneven melt distribution within the Chill mold arises as a result of unstable flow processes, which mostly come from the upper one Pouring area of the dip tube result. These are caused by the dynamic interplay of plugs or slide system and dip tube inlet. The resulting and associated with strong pressure fluctuations turbulent flow fluctuations pass through the dip tube and lead to the the aforementioned negative phenomena. These are vortex formations, combined with an uneven, locally preferred application of the flow to the inner walls of the immersion pouring tube. Go through these currents the immersion nozzle and lead due to their radially aligned portion of the speed component to prefer one or more of the outlet openings. A change in the preferred outlet openings is also observed, which leads to regularly recurring mold level fluctuations.
  • flow guide bodies designed according to the invention By installing flow guide bodies designed according to the invention the radial component of the flow is slowed down especially in the upper pouring area, and that without significantly reducing the inner cross section of the immersion nozzle.
  • Flow guide bodies with the features according to the invention become the harmful ones Flows in the area of their origin in the continuous melt flow significantly calmed down and suppressed the radial speed components, whereby the flow fluctuations are significantly reduced in their This results in a flow that is predominantly oriented tangentially to the pouring direction within the immersion tube.
  • the immersion pouring tube 1 connects a casting or intermediate container, not shown, which is filled with molten steel, with a mold that also goes up to the bathroom mirror is filled with molten steel. Any one is known in a manner known to those skilled in the art Control element (plug or slide closure) for upstream control the molten steel is arranged in the immersion pouring tube 1. At 17 is the usual gain of the refractory material through high-quality oxide components in the area of the bath level. With the outlet end, the pouring tube 1 is immersed with its opposite outlet openings 8, 8 'into the liquid melt of the mold on. At the lower end, the immersion pouring tube 1 is provided with a base element 10, two lateral outlet openings 8, 8 'being present above the same are.
  • the immersion pouring tube 1 forms a tube piece 11 in the upper region, with the other Inner walls several flow guide bodies 12, 13, seen in longitudinal section each right and left, are present.
  • the mold has broad side walls and narrow side walls in a manner known per se, for example in an embodiment for the continuous casting of flat products.
  • the width b, the height h and the length I of a flow guide body 12, 13 can be variable over the length L of the immersion pouring tube 1.
  • Figures 1 and 2 show that the cross-sectional shape of a flow guide 12, 13 preferably follows a rectangular or trapezoidal shape.
  • the bottom element 10 has the shape of one on both sides has tapered wedges, which distributes the melt flow evenly favored in the two exit directions of the openings 8, 8 '.
  • FIG. 3 a A further beveling of the floor element 10 can be seen from FIG. 3 a.
  • the edges of a flow guide body 12, 13 can also Show roundings.
  • FIGS. 1a-1c and 2a-2c An embodiment of the immersion pouring tube 1 according to the invention is shown in FIGS. 1a-1c and 2a-2c.
  • a flow channel 11 can have a circular, elliptical or elliptical, convex or polygonal flow cross-section E, and this can be variable over the length L of the immersion nozzle.
  • the immersion pouring tube 1 shows in longitudinal section, first in the upper region I 1, a rotationally symmetrical cross section, indicated by dash-dotted lines, which transitions into a lower region I 2 with a continuous transition to a flattened cross section. This is followed by separately designed outlet openings 8, 8 'which maintain the cross-sectional area.
  • These areas I 1 and I 2 are assigned flow guide bodies 12 and 13, respectively, which, in the upper area 13 ', brake the spread of disturbed radially oriented flow forms particularly intensively.
  • the cross-sectional shape of the immersion pouring tube 1 in the area of the sectional plane A-A is in 1b. It corresponds approximately to a flat elliptical E with trapezoidal shape Flow guide bodies 13, 13 'with the height h and the width b.
  • Fig. 1c shows in longitudinal section a by 90 ° with respect to the Fig. 1a pivoted position of the cross-sectional shape of the immersion 1 and the course of one of walls parallel with flow guide 12 in the upper part 1 1 a wedge shape after tapered bottom wall portion with Strömungleit stressesn 13, 13 'in Section 1 2 .
  • additional but continuous lateral flow guide 19 can also be provided within the outlet openings 8, 8 ', as shown in FIG. 2a is shown.
  • the flow guide body 13, 13 ' can over the entire length L of the immersion pouring tube 1 into the outlet openings 8, 8 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Food-Manufacturing Devices (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (3)

  1. Tube plongeur (1) pour introduire une masse fondue d'acier provenant d'un récipient de coulée ou intermédiaire dans une coquille pourvue de parois larges et étroites pour la coulée continue de produits plats, le tube plongeur (1) étant exécuté avec un canal d'écoulement (11) pouvant être raccordé au récipient de coulée ou intermédiaire, présentant au moins deux orifices de sortie (8, 8') disposés au-dessus d'un élément de fond (10) par rapport à son axe médian (x-x) ou par rapport au centre de gravité de sa section et présentant des corps de guidage de l'écoulement (12, 13) internes, qui s'étendent des zones de paroi (18, 18') du tube plongeur (1) contre son axe médian (x-x), dont la section d'écoulement passe d'une zone supérieure à symétrie de rotation (l1) en continu dans une section aplatie dans la zone inférieure (l2) contre les orifices de sortie (8, 8'), caractérisé en ce que des corps de guidage de l'écoulement (12, 13) sont associés à au moins l'une de ces zones (l1, l2) et en ce que la hauteur (h) des corps de guidage de l'écoulement (12, 13) commençant en une zone supérieure du canal d'écoulement (11) passe dans sa zone de paroi (18, 18').
  2. Tube plongeur selon la revendication 1, caractérisé en ce que l'élément de fond (10) présente une forme guidant l'écoulement, de préférence la forme d'une pièce en coin rétrécissant vers les deux côtés.
  3. Tube plongeur selon la revendication 1 ou 2, caractérisé en ce qu'on a disposé dans les orifices de sortie des corps de guidage de l'écoulement (19) supplémentaires.
EP98116587A 1997-09-03 1998-09-02 Tube plongeur pour introduire un métal fondu, à partir d'un récipient de coulée ou un récipient intermédiaire, dans une coquille Expired - Lifetime EP0900609B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19738385 1997-09-03
DE19738385A DE19738385C2 (de) 1997-09-03 1997-09-03 Tauchgießrohr zum Einleiten von Schmelze aus einem Gieß- oder Zwischenbehälter in eine Kokille

Publications (2)

Publication Number Publication Date
EP0900609A1 EP0900609A1 (fr) 1999-03-10
EP0900609B1 true EP0900609B1 (fr) 2002-07-10

Family

ID=7840998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98116587A Expired - Lifetime EP0900609B1 (fr) 1997-09-03 1998-09-02 Tube plongeur pour introduire un métal fondu, à partir d'un récipient de coulée ou un récipient intermédiaire, dans une coquille

Country Status (4)

Country Link
EP (1) EP0900609B1 (fr)
AT (1) ATE220357T1 (fr)
DE (2) DE19738385C2 (fr)
ES (1) ES2180104T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA033735B1 (ru) * 2015-11-10 2019-11-20 Vesuvius Usa Corp Разливочный стакан, содержащий дефлекторы потока

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10113026C2 (de) * 2001-03-17 2003-03-27 Thyssenkrupp Stahl Ag Tauchrohr für das Vergießen von Metallschmelze, insbesondere von Stahlschmelze
DE10240491A1 (de) * 2002-09-03 2004-01-15 Refractory Intellectual Property Gmbh & Co.Kg Feuerfestes keramisches Tauchrohr
DE50301315D1 (de) 2003-08-01 2006-02-16 Hof Te Fiennes N V Giesssystem und Verfahren zum Vergiessen von NE-Metallschmelzen
CN111922328A (zh) * 2020-09-04 2020-11-13 江苏隆达超合金航材有限公司 一种新型的高温合金母合金浇注用浇嘴

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631753C (de) * 1934-03-03 1938-02-25 Heinrich Brinkmann Dipl Ing Bodenausguss mit Leitflaechen an Giesspfannen fuer Metall
DE1201013B (de) * 1961-03-18 1965-09-16 Stoecker & Kunz Ges Mit Beschr Ausguss am Boden einer Giesspfanne fuer fluessige Metalle
DE1235524B (de) * 1965-08-04 1967-03-02 Stoecker & Kunz G M B H Ausguss an Giesspfannen mit Stopfenverschluss
DE3444228C2 (de) * 1984-11-30 1986-12-18 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zur Erzeugung einer gerichteten Strömung
JPS63295056A (ja) * 1987-05-27 1988-12-01 Nkk Corp 溶湯注入ノズル
GB8814331D0 (en) * 1988-06-16 1988-07-20 Davy Distington Ltd Continuous casting of steel
DE3918228C2 (de) * 1989-06-03 1996-11-07 Schloemann Siemag Ag Tauchgießrohr zum Einleiten von Stahlschmelze in eine Stranggießkokille
DE4320723A1 (de) * 1993-06-23 1995-01-05 Didier Werke Ag Eintauchausguß

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA033735B1 (ru) * 2015-11-10 2019-11-20 Vesuvius Usa Corp Разливочный стакан, содержащий дефлекторы потока

Also Published As

Publication number Publication date
DE59804710D1 (de) 2002-08-14
ATE220357T1 (de) 2002-07-15
EP0900609A1 (fr) 1999-03-10
ES2180104T3 (es) 2003-02-01
DE19738385C2 (de) 2000-02-24
DE19738385A1 (de) 1999-03-04

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