EP1603697B1 - Buse a entree immergee a stabilisation dynamique - Google Patents

Buse a entree immergee a stabilisation dynamique Download PDF

Info

Publication number
EP1603697B1
EP1603697B1 EP04718823A EP04718823A EP1603697B1 EP 1603697 B1 EP1603697 B1 EP 1603697B1 EP 04718823 A EP04718823 A EP 04718823A EP 04718823 A EP04718823 A EP 04718823A EP 1603697 B1 EP1603697 B1 EP 1603697B1
Authority
EP
European Patent Office
Prior art keywords
pour tube
exit port
flow
bore
tongue
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
EP04718823A
Other languages
German (de)
English (en)
Other versions
EP1603697A1 (fr
Inventor
Dong Xu
Lawrence Heaslip
Johan Richaud
James Dorricott
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.)
Vesuvius Crucible Co
Original Assignee
Vesuvius Crucible Co
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 Vesuvius Crucible Co filed Critical Vesuvius Crucible Co
Publication of EP1603697A1 publication Critical patent/EP1603697A1/fr
Application granted granted Critical
Publication of EP1603697B1 publication Critical patent/EP1603697B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel

Definitions

  • This invention relates generally to a refractory article and, more particularly, to a refractory pour tube for use in the transfer of molten metal in a continuous casting operation.
  • a stream of molten metal is typically transferred via a refractory pour tube from a first metallurgical vessel into a second metallurgical vessel or mold.
  • Such tubes are commonly referred to as nozzles or shrouds and possess a bore adapted to transfer molten metal.
  • Pour tubes include submerged-entry nozzles (SEN) or submerged-entry shrouds (SES), which discharge molten metal below the liquid surface of a receiving vessel or mold.
  • Liquid metal is discharged from the downstream end of the bore through one or more outlet ports.
  • One important function of a pour tube is to discharge the molten metal in a smooth and steady manner without interruption or disruption. A smooth, steady discharge facilitates processing and can improve the quality of the finished product.
  • a second important function of a pour tube is to establish proper dynamic conditions within the liquid metal in the receiving vessel or mold in order to facilitate further processing. Producing proper dynamic conditions may require the pour tube to possess a plurality of exit ports that are arranged so as to cause the stream of molten metal to be turned in one or more directions upon discharge from the tube.
  • Factors which can disrupt a smooth and steady discharge, include both physical and dynamic conditions that result in asymmetrical flow behavior of the molten metal in the bore and in the exit ports.
  • Asymmetries in the metal flow velocity distribution and streamlines can result from, for example, (a) an ineffective design of the bore and ports, (b) the presence of upstream flow-rate control devices, and (c) the non-uniform build-up of clogging material within the bore and ports. Even in the absence of these factors, turbulent flow in the bore may still cause the development of dynamic flow asymmetries.
  • a molten metal stream may develop higher fluid velocity near the centerline of the bore than along the sides of the bore, or lower velocity on one side of the centerline as compared to the opposite side, or higher fluid velocity off the centerline.
  • Throttling devices such as stopper rods or slide-gate valves, can partially obstruct the entrance to the bore, and cause the steam of molten metal to enter the bore off the centerline.
  • the stream can flow preferentially down one side of the bore, and exit asymmetrically or non-uniformly from the pour tube causing excessive surging and turbulence in a mold. Pulsing, surging, turbulence and asymmetry of the discharged flow are aggravated by port arrangements that cause the stream to turn before being discharged from the tube. Asymmetries in the streaming flow approaching an exit port can induce unstable spinning and swirling of the turned flow as it is discharged through the ports causing instability of the discharge direction, instability of the pattern of flow induced within the receiving vessel, and thus undesirable dynamic conditions in the receiving vessel.
  • Precipitates or non-metallic build-ups may also clog or restrict the bore so as to disrupt steady discharge of molten metal from the tube.
  • precipitates and non-metallic build-ups consist primarily of alumina and other high melting point impurities.
  • Alumina deposits can lead to restrictions and clogging that can stop or substantially impede the smooth and steady flow of liquid steel.
  • Asymmetrical non-uniform metal flow can lead to the presence of preferential sites for clogging deposits and can further exacerbate flow non-uniformity.
  • Tubes may be unclogged using an oxygen lance; however, lancing disrupts the casting process, reduces refractory life, and decreases casting efficiency and the quality of the steel produced. Total or substantial blockage of the bore by precipitates decreases the expected life of the pour tube and is very costly and time-consuming to steel producers.
  • Prior art attempts to improve flow include both chemical and mechanical means. For example, flow may be improved by reducing alumina precipitation and subsequent clogging.
  • Prior art has injected gas to pressurize the pour tube and reduce alumina clogging.
  • gas injection requires large volumes of gas, complicated refractory designs, and is not always an effective solution. Gas may also dissolve or become entrapped within the metal causing problems in metal quality including pinhole or porosity defects in the steel.
  • prior art has lined the bore with refractory compositions that are claimed to resist alumina buildup.
  • Compositions include lower melting point refractories, such as CaO-MgO-Al 2 O 3 eutectics, calcium zirconate and calcium silicide, that slough off as alumina deposits on the surface. These compositions tend to crack at high temperature, and, during casting, they may de-hydrate and dissipate. For these reasons, their useful life is limited.
  • Other surface compositions that claim to inhibit alumina deposition include refractories containing SiAlON-graphite, metal diborides, boron nitrides, aluminum nitride, and carbon-free compositions. Such refractories can be expensive, impractical, and manufacturing can be both hazardous and time consuming.
  • Prior art also includes designs that claim to improve flow by reducing alumina deposition in the bore. These designs include pour tubes with both conical and "stepped" bores.
  • U.S. Pat. No. 4,566,614 to Frykendahl teaches an inert gas-injection nozzle having a conical bore intended to reduce "pulsations" in the gas flow. Smoother gas flow into the bore is said to reduce clogging.
  • “Stepped" designs include pour tubes that have discontinuous changes in bore diameter. Stepped designs also include pour tubes having a spiral bore.
  • JP Kokai 61-72361 is illustrative of stepped pour tubes, and describes a pour tube having a bore with at least one convex or concave section that generates turbulent flow in the molten metal. Turbulent flow, as contrasted with laminar flow, is described as reducing alumina clogging.
  • U.S. Pat. No. 5,328,064 to Nanbo et al. teaches a bore having a plurality of concave sections separated by steps having a constant diameter, d. Each section has a diameter greater than d, and preferably the diameters of the sections decrease along the direction of flow. The steps are described as generating turbulence that reduces alumina clogging.
  • US 6425505 to Heaslip teaches a pour tube comprising a plurality of fluidly connected sections that improve the flow of molten metal through the bore.
  • the sections reduce asymmetric flow of the molten metal stream and the likelihood of precipitates clogging the bore.
  • Each section comprises a converging portion and a diverging portion.
  • the converging portion deflects the stream toward the center of the bore, while the diverging portion diffuses the stream.
  • the combination of converging and diverging elements produce a more symmetrical flow in the pour tube.
  • Prior art attempts to control the flow of molten metal within the bore have done little to control unsteady flow from the exit ports of the pour tube.
  • the exit ports induce unstable flow patterns in the outflow stream.
  • Non-steady flow from the pour tube into a mold can increase meniscus turbulence and waving. Such flow can also cause the outflow stream to wander in the mold and can bias the flow pattern in the mold.
  • unstable outflow can cause alumina clogging in the lower regions of the pour tube, including the well bottom of the tube and the lower corners of the ports. Clogging will typically impart an asymmetrical outflow from the pour tube.
  • a refractory pour tube that produces a stable outflow and reduces meniscus turbulence, waving, asymmetrical flow patterns, and alumina clogging.
  • such a tube would also improve the flow of molten metal into a casting mold and improve the properties of the cast metal.
  • the present invention relates to a pour tube for use in the casting of molten metal.
  • the pour tube includes at least one exit port and, relative to prior art, provides a more stable, uniform outflow of molten metal through and from the exit port. Improved outflow reduces meniscus turbulence and waving, reduces alumina clogging, and promotes symmetrical outflow. These benefits can result in an improved finished product.
  • the article comprises a pour tube having an exit port shape that reduces flow instability, thereby producing a steadier outflow.
  • This shape reduces the unstable back-and-forth spinning flow pattern that is common in outflow streams from a pour tube.
  • This flow pattern is described as at least partially responsible for mold flow instabilities and poor quality castings.
  • the invention includes an exit port that stabilizes and controls spinning or rotating of the flow as the flow passes through an outlet port and discharges into the mold.
  • Large-scale spinning whereby the circumference of the rotating flow approaches the width or height of an outlet port is opposed and thereby reduced.
  • Unstable and uncontrolled large-scale spinning of the discharge flow is believed to cause more wandering and instability of the flow pattern generated in the mold or receiving vessel.
  • the exit port includes a plurality of slots that produce consistent counter-rotating flows in the molten metal and that oppose large-scale spinning of the flow in a single direction or large-scale flow spinning that oscillates from one direction to the opposite direction.
  • Stable counter-rotating flows within the outflow from the tube provide a more diffusive, homogeneous, and less turbulent discharge of molten metal and thereby provide a more consistent flow pattern in the receiving vessel.
  • the outflow from a pour tube may form a portion of an upper circulation loop within a mold.
  • the upper circulation loop is proximate to the upper surface of the mold and affects, for example, top surface waving and meniscus turbulence.
  • the outflow from an exit port of the present invention can direct more molten metal to the surface of the mold without causing excessive meniscus turbulence or mold level fluctuation. Thermal distribution within the mold may also be improved. The overall flow pattern within the mold becomes more stable.
  • the exit port includes a tongue on its downstream edge.
  • the tongue, and the downstream edge define slots in the lower corners of the exit port. The presence of these slots opposes large-scale spinning of the discharge flow and promotes the formation of small-scale counter-rotating flows within the outflow from the tube.
  • An exit port comprising a tongue alters the pressure and flow characteristics within an exit port and within the outlet region of the pour tube, so that alumina clogging and asymmetric flow is reduced.
  • the exit port includes a tongue on its upstream edge.
  • the tongue, and the upstream edge define slots in the upper corners of the exit port. The presence of these slots opposes large-scale flow spinning within the outflow. Large scale spinning is undesirable as such spinning is inherently unstable and generally exhibits occasional switching of direction, providing inconsistent direction of discharge and unstable dynamic behavior in the discharge flow and subsequently in the mold.
  • the exit port includes tongues on both the upstream and downstream edges of the port.
  • An exit port comprising both upstream and downstream tongues promotes the formation of steady counter-rotating flows within the outflow with excellent symmetry and of small and controlled scale.
  • the invention comprises a pour tube for use in the continuous casting of molten metal.
  • the pour tube comprises a bore fluidly connected to at least one exit port.
  • Pour tube means shrouds, nozzles, and other refractory pieces for directing a stream of molten metal, including, for example, submerged entry shrouds and nozzles.
  • the invention is particularly suited for pour tubes having an exit port adapted to deliver molten metal below the surface of the metal in a receiving vessel such as a mold.
  • Figs. 1 and 2 show alternative perspectives of a pour tube 1.
  • the pour tube 1 comprises an inlet 11 and an exit port 12 fluidly connected by a bore 13.
  • the pour tube 1 permits a stream of molten metal to pass from an upstream end at the inlet 11, through the bore and to a downstream end at the exit port 12.
  • the exit port 12 is defined by the perimeter of a hole that extends through the pour tube 1 from its outer surface to its bore 13.
  • the perimeter of the exit port 12 comprises a downstream surface 21.
  • the perimeter of the exit port may be of any convenient general shape including, but not limited to, oval, polygonal or any combination thereof. Conveniently, the general shape of the exit port is substantially rectangular.
  • the exit port 12 is defined by the downstream surface 21, an upstream surface 22, and side surfaces 23 connecting the downstream and upstream surfaces.
  • At least one tongue 24 extends from either the downstream surface 21 or upstream surface 22.
  • the tongue 24, downstream surface 21 and side surfaces 23 define a plurality of slot-shaped openings 25.
  • Figure 3 shows a pour tube 2 of the prior art with inlet 11 and exit port 12.
  • a portion of the kinetic energy of a downward stream 31 of molten metal translates into a rotating outflow 32 having an angular momentum.
  • the remaining kinetic energy causes the stream to exit the exit port as a high velocity jet.
  • Rotating outflow 32 is shown to be spinning in a counterclockwise direction as viewed, but the spinning direction of the outflow from a pouring tube of the prior art is unstable and will exhibit occasional switching of direction.
  • the scale of the spinning in the outflow can be as great as the width, and the height, or the diameter of the exit port.
  • the exit port 12 of the present invention redirects the downward stream 31 of molten metal at least partially through the slots 25.
  • the slots translate at least a portion of the kinetic energy of the downward stream 31 into at least two counter-rotating flows 41 and thus oppose formation of a single large-scale spinning loop within the outflow.
  • the angular momentums of the counter-rotating flows 41 substantially cancel so that the outflow from the exit port 12 has little or no net angular momentum.
  • the kinetic energy and consequently the velocity of the discharged flow are substantially reduced since the discharged flow is more uniformly distributed throughout exit port 12.
  • Counter-rotating flows 41 permit the velocity of the outflow to be substantially reduced and large-scale spinning, swirling or vortexing in the outflow to be inhibited.
  • Outflow is more diffusive and can be directed closer to the surface without causing surface waving or turbulence.
  • a more diffusive outflow results in better thermal distribution in a mold.
  • flow separation in the exit port 12 and the associated alumina clogging are reduced. Flow instabilities inherent in alumina clogging may be substantially avoided.
  • a tongue should be of a sufficient size to defme slots capable of inducing counter-rotating flows in the outflow.
  • the tongue 24 has a width (w1) 51 and a height (h1) 52.
  • the width 51 of the tongue will typically be at least about one-eighth of the exit port's width 53.
  • the height 52 of the tongue will commonly be at least about one-eighth the height 54 of the exit port 12.
  • increasing the dimensions of the tongue can reduce the total discharge area of the exit port, thereby reducing the possible outflow from the pour tube, so the tongue will often be as small as possible to produce the counter-rotating flows.
  • Casting conditions including the grade of molten metal, casting temperature, mold geometry, volume of outflow, size of the pour tube, and size of the exit port, will affect the dimensions of the tongue.
  • the tongue and its associated slots are designed to turn the discharge flow to a desired angle.
  • Longitudinal axis 61 of the bore 13 is aligned with the general direction of the downward metal flow through the bore.
  • Perpendicular axis 63 is at a right angle to longitudinal axis 61 and passes generally centrally through an exit port.
  • the surface of the tongue away from the edge is defined as the extended surface 64, and is arranged at angle ⁇ 1 to perpendicular axis 63.
  • Downstream surface 65 of a slot is arranged at angle ⁇ 2 to perpendicular axis 63. Angles ⁇ 1 and ⁇ 2 can be chosen to turn portions of the discharge flow to the desired angles of discharge.
  • angles of discharge will depend on the casting conditions, such as grade of molten metal, casting temperature, mold geometry, volume of outflow, size of the pour tube, and size of the exit port.
  • the angles ⁇ 1 and ⁇ 2 typically range from -45 to +45 degrees.
  • Fig. 7 shows a second embodiment of a pour tube of the present invention.
  • the pour tube 1 comprises an inlet 11 and an exit port 12 fluidly connected by a through-flow bore 13.
  • the pour tube 1 is adapted to transport a stream of molten metal from an upstream end at the inlet 11, through the bore, and to a downstream end comprising the exit port 12.
  • the exit port 12 is defined by an upstream surface 22, a downstream surface 21, and side surfaces 23 connecting the downstream and upstream surfaces.
  • the exit port may be of any convenient general shape including, but not limited to, oval, polygonal or any combination thereof. Conveniently, the general shape of the exit port is substantially rectangular.
  • At least one tongue 24 extends downstream from the upstream surface 22.
  • the tongue 24, upstream surface 22 and side surfaces 23 define a plurality of slot-shaped openings 25.
  • An exit port 12 of the present invention redirects the downward stream 31 of molten metal at least partially through the slots 25.
  • the slots 25 translate at least a portion of the kinetic energy of the spinning flows 32 into counter-rotating flows 41.
  • the angular momentums of the counter-rotating flows 41 substantially reduce the angular momentum of the outflow from the exit port 12.
  • Large-scale spinning, swirling or vortexing in the outflow is inhibited and the outflow is more symmetric, more diffusive and can be directed closer to the top surface of the mold or receiving vessel without excessive surface waving or turbulence.
  • flow separation in the exit port 12 flow instabilities inherent in alumina clogging may be substantially avoided, and the associated alumina clogging may be reduced..
  • Fig. 9 shows a third embodiment of a pour tube of the present invention.
  • the pour tube 1 comprises an inlet 11 and exit port 12 fluidly connected by a through-flow bore 13.
  • the pour tube 1 is adapted to transport a stream of molten metal from an upstream end at the inlet 11, through the bore, and to a downstream end comprising the exit port 12.
  • the exit port 12 is defined by an upstream surface 22, a downstream surface 21, and side surfaces 23 connecting the downstream and upstream surfaces.
  • the exit port may be of any convenient general shape including, but not limited to, oval, polygonal or any combination thereof. Conveniently, the general shape of the exit port is substantially rectangular.
  • At least one lower tongue 91 extends upstream from the downstream surface 21 and at least one upper tongue 92 extends downstream from the upstream surface 22.
  • the lower tongue 91, the upper tongue 92, downstream surface 21, upstream surface 22 and side surfaces 23 define a plurality of slot-shaped openings 25. Molten metal being discharged from pour tube 1 passes at least partially through the slots 25 with formation of counter-rotating flows of small-scale and very high stability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Nozzles (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (10)

  1. Tube de coulée (1) pour utilisation dans la coulée d'un jet de métal à l'état fondu depuis une position amont vers une position aval, le tube de coulée (1) comprenant une surface interne définissant un alésage (13) et une surface externe possédant au moins un orifice de sortie (12) défini au moins partiellement par un bord (21,22) et connecté de manière fluide à l'alésage, caractérisé en ce qu'au moins une languette (24,91,92) s'étend depuis un bord (21,22) de l'orifice de sortie (12), grâce à quoi, au moins deux fentes (25) sont créées dans l'orifice de sortie (12).
  2. Tube de coulée selon la revendication 1, caractérisé en ce que l'orifice de sortie (12) comprend un bord aval (21) et la languette (24,91) s'étend vers l'amont à partir du bord aval (21).
  3. Tube de coulée selon la revendication 1 ou 2, caractérisé en ce que l'orifice de sortie (12) comprend un bord amont (22) et la languette (24,92) s'étend vers l'aval depuis le bord amont (22).
  4. Tube de coulée selon l'une quelconque des revendications 1 à 3, le tube de coulée (1) incluant un axe longitudinal (61) entre les positions amont et aval, caractérisé en ce qu'au moins une languette (24,91,92) comprend une surface étendue (64), et en ce que la surface étendue (64) définit un plan de languette qui coupe l'axe longitudinal (61) selon un angle de -45 à +45°.
  5. Tube de coulée selon la revendication 4, caractérisé en ce qu'au moins un bord (21,22) comprend une surface de bord définissant un plan de bord qui coupe l'axe longitudinal selon un angle de -45 à +45°.
  6. Tube de coulée selon la revendication 4 ou 5, caractérisé en ce que l'orifice de sortie (12) définit un plan de sortie substantiellement parallèle à l'axe longitudinal (61).
  7. Tube de coulée selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'alésage (13) comprend une pluralité de sections connectées de manière fluide.
  8. Tube de coulée selon la revendication 4, caractérisé en ce qu'une discontinuité sépare chaque section.
  9. Tube de coulée selon l'une quelconque des revendications 7 et 8, caractérisé en ce que les sections comprennent au moins une section tronconique.
  10. Méthode pour la coulée d'un jet de métal à l'état fondu utilisant un tube de coulée (1) tel que décrit dans l'une quelconque des revendications 1 à 9 comprenant les étapes de :
    a) écoulement d'un jet de métal (31) à travers l'alésage (13);
    b) direction du jet vers l'orifice de sortie (12);
    c) production de courants symétriques contrarotatifs (41) dans le jet au moment où le jet passe au travers de l'orifice de sortie (12).
EP04718823A 2003-03-17 2004-03-09 Buse a entree immergee a stabilisation dynamique Expired - Lifetime EP1603697B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US45515503P 2003-03-17 2003-03-17
US455155P 2003-03-17
PCT/US2004/007184 WO2004082871A1 (fr) 2003-03-17 2004-03-09 Buse a entree immergee a stabilisation dynamique

Publications (2)

Publication Number Publication Date
EP1603697A1 EP1603697A1 (fr) 2005-12-14
EP1603697B1 true EP1603697B1 (fr) 2006-08-16

Family

ID=33029966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04718823A Expired - Lifetime EP1603697B1 (fr) 2003-03-17 2004-03-09 Buse a entree immergee a stabilisation dynamique

Country Status (16)

Country Link
US (1) US20060169728A1 (fr)
EP (1) EP1603697B1 (fr)
JP (1) JP2006520694A (fr)
KR (1) KR20050113230A (fr)
CN (1) CN100346909C (fr)
AT (1) ATE336319T1 (fr)
AU (1) AU2004221863B2 (fr)
BR (1) BRPI0408340A (fr)
CA (1) CA2519050A1 (fr)
DE (1) DE602004001980T2 (fr)
ES (1) ES2267057T3 (fr)
MX (1) MXPA05009852A (fr)
RU (1) RU2331496C2 (fr)
UA (1) UA85179C2 (fr)
WO (1) WO2004082871A1 (fr)
ZA (1) ZA200507285B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0610809D0 (en) 2006-06-01 2006-07-12 Foseco Int Casting nozzle
JP4938490B2 (ja) * 2007-02-19 2012-05-23 株式会社神戸製鋼所 溝付浸漬ノズル
JP5172432B2 (ja) * 2008-04-01 2013-03-27 株式会社神戸製鋼所 溝付浸漬ノズルを用いた極低炭素鋼又は低炭素鋼の連続鋳造方法
EP2319640A1 (fr) * 2009-10-21 2011-05-11 Vesuvius Group S.A Busette de coulée et assemblage d'une telle busette de coulée avec une busette interne
MY166993A (en) * 2010-07-02 2018-07-27 Vesuvius Crucible Co Submerged entry nozzle
US9676029B2 (en) 2010-07-02 2017-06-13 Vesuvius Crucible Company Submerged entry nozzle
JP6217778B2 (ja) * 2016-03-31 2017-10-25 品川リフラクトリーズ株式会社 浸漬ノズル

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517726A (en) * 1969-08-04 1970-06-30 Inland Steel Co Method of introducing molten metal into a continuous casting mold
JPS5246164B2 (fr) * 1973-04-26 1977-11-22
GB1472449A (en) * 1973-09-04 1977-05-04 Sumitomo Metal Ind Nozzle for a continuous metal casting tundish
JPS53578Y2 (fr) * 1973-09-04 1978-01-10
SE444397B (sv) * 1982-10-15 1986-04-14 Frykendahl Bjoern Anordning for gjutning vid metallurgiska processer
JPS6316837A (ja) * 1986-07-08 1988-01-23 Nippon Kokan Kk <Nkk> 溶湯注入ノズル
JPH05282Y2 (fr) * 1987-10-23 1993-01-06
JPH02169160A (ja) * 1988-12-21 1990-06-29 Kawasaki Steel Corp 連続鋳造用浸漬ノズル
JPH0723091Y2 (ja) * 1990-05-08 1995-05-31 品川白煉瓦株式会社 連続鋳造用複数段差付浸漬ノズル
US5227078A (en) * 1992-05-20 1993-07-13 Reynolds Metals Company Flow-vectored downspout assembly and method for using same
FR2698807A3 (fr) * 1992-12-08 1994-06-10 Lorraine Laminage Busette de couléee continue de brames d'acier.
US5785880A (en) * 1994-03-31 1998-07-28 Vesuvius Usa Submerged entry nozzle
US5944261A (en) * 1994-04-25 1999-08-31 Vesuvius Crucible Company Casting nozzle with multi-stage flow division
AT400935B (de) * 1994-07-25 1996-04-25 Voest Alpine Ind Anlagen Tauchgiessrohr
DE4436990C1 (de) * 1994-10-07 1995-12-07 Mannesmann Ag Tauchgießrohr
FR2739313B1 (fr) * 1995-09-28 1997-10-31 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux
IT1284035B1 (it) * 1996-06-19 1998-05-08 Giovanni Arvedi Tuffante per la colata continua di bramme sottili
FR2754748B1 (fr) * 1996-10-23 1998-12-04 Vesuvius France Sa Piece de transfert et son procede de fabrication
US6016941A (en) * 1998-04-14 2000-01-25 Ltv Steel Company, Inc. Submerged entry nozzle
US6425505B1 (en) * 1999-09-03 2002-07-30 Vesuvius Crucible Company Pour tube with improved flow characteristics

Also Published As

Publication number Publication date
KR20050113230A (ko) 2005-12-01
ES2267057T3 (es) 2007-03-01
JP2006520694A (ja) 2006-09-14
CN100346909C (zh) 2007-11-07
DE602004001980D1 (de) 2006-09-28
MXPA05009852A (es) 2005-12-06
DE602004001980T2 (de) 2007-02-01
AU2004221863A1 (en) 2004-09-30
WO2004082871A1 (fr) 2004-09-30
RU2005130062A (ru) 2006-02-10
BRPI0408340A (pt) 2006-03-21
CA2519050A1 (fr) 2004-09-30
AU2004221863B2 (en) 2009-04-09
ZA200507285B (en) 2006-12-27
US20060169728A1 (en) 2006-08-03
RU2331496C2 (ru) 2008-08-20
CN1761543A (zh) 2006-04-19
UA85179C2 (ru) 2009-01-12
EP1603697A1 (fr) 2005-12-14
ATE336319T1 (de) 2006-09-15

Similar Documents

Publication Publication Date Title
AU734914B2 (en) Casting nozzle with diamond-back internal geometry and multi-part casting nozzle with varying effective discharge angles and method for flowing liquid metal through same
EP1232031B8 (fr) Busette de coulee possedant des caracteristiques d&#39;ecoulement ameliorees
KR101384019B1 (ko) 용융 금속의 연속 주조 방법
JP3662973B2 (ja) 連続鋳造用排出ノズル
US6467704B2 (en) Nozzle for guiding molten metal
EP1603697B1 (fr) Buse a entree immergee a stabilisation dynamique
AU2002212458A1 (en) Submerged entry nozzle and utilisation thereof
CN214161385U (zh) 浇铸水口
EP1854571B1 (fr) Buse de coulée à immersion pour coulée continu de l&#39;acier
KR20050026541A (ko) 주조용 노즐
EP1687110B1 (fr) Buse de coulee a sorties multiples
RU2802242C2 (ru) Разливочный стакан
WO2002081123A2 (fr) Regulation amelioree d&#39;un flux de metal en fusion
WO2005021187A1 (fr) Busette immergee pour la coulee continue

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20051017

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

DAX Request for extension of the european patent (deleted)
GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060816

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602004001980

Country of ref document: DE

Date of ref document: 20060928

Kind code of ref document: P

REG Reference to a national code

Ref country code: RO

Ref legal event code: EPE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061116

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061116

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070116

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2267057

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20070403

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070518

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20090219

Year of fee payment: 6

Ref country code: ES

Payment date: 20090326

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20090225

Year of fee payment: 6

Ref country code: NL

Payment date: 20090324

Year of fee payment: 6

Ref country code: RO

Payment date: 20090224

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090327

Year of fee payment: 6

Ref country code: IT

Payment date: 20090327

Year of fee payment: 6

Ref country code: SE

Payment date: 20090327

Year of fee payment: 6

Ref country code: TR

Payment date: 20090225

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070217

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090430

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090317

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090403

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080309

BERE Be: lapsed

Owner name: *VESUVIUS CRUCIBLE CY

Effective date: 20100331

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20101001

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110415

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110404

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100309