WO2000040358A1 - Ensemble refractaire - Google Patents

Ensemble refractaire Download PDF

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Publication number
WO2000040358A1
WO2000040358A1 PCT/BE1999/000170 BE9900170W WO0040358A1 WO 2000040358 A1 WO2000040358 A1 WO 2000040358A1 BE 9900170 W BE9900170 W BE 9900170W WO 0040358 A1 WO0040358 A1 WO 0040358A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
pouring
essentially
assembly according
channel
Prior art date
Application number
PCT/BE1999/000170
Other languages
English (en)
Inventor
Vincent Boisdequin
Original Assignee
Vesuvius Crucible Company
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 Company filed Critical Vesuvius Crucible Company
Priority to AU18511/00A priority Critical patent/AU755773B2/en
Priority to KR1020017008495A priority patent/KR20010089763A/ko
Priority to AT99962002T priority patent/ATE223272T1/de
Priority to JP2000592096A priority patent/JP2002534267A/ja
Priority to CA002356350A priority patent/CA2356350A1/fr
Priority to BR9916777-8A priority patent/BR9916777A/pt
Priority to DE69902824T priority patent/DE69902824T2/de
Priority to EP99962002A priority patent/EP1148961B1/fr
Publication of WO2000040358A1 publication Critical patent/WO2000040358A1/fr

Links

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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/42—Features relating to gas injection

Definitions

  • the invention concerns a device for regulating the flow rate of a pouring, notably of an installation for pouring a molten metal, such as steel or cast iron. It concerns more particularly the injection of an inert fluid such as argon, in a refractory assembly used in a regulating device of this type. This fluid is designed to cooperate mechanically with the molten metal.
  • Devices for regulating the flow rate have a pouring channel, downstream from which two refractory plates, each with an orifice, are usually interposed. These plates are essentially perpendicular to the axis of the channel and one of the plates can slide relative to the other, toward one side of the channel.
  • the aperture of the sliding plate coincides essentially with the axis of the pouring and the respective apertures of the plates mutually communicate.
  • the aperture of the sliding plate is offset at a distance from the other plate and the two plates thus close off their mutual aperture.
  • a means of injection is generally distributed over the entire periphery of the channel for injecting the said fluid all around the axis of the channel.
  • the radial injection of the fluid thus permits a uniform and axisyrnmetric injection.
  • the sliding plate is slightly offset relative to the other plate, in an intermediate position between the said pouring and stop positions to furnish a moderate or low pouring flow rate.
  • the molten metal then encounters an obstacle formed by the edge of the aperture of the sliding plate with regard to the axis of the channel. An erosion of this orifice generally results.
  • solid deposits can form on the edge of the aperture, above the sliding plate, in a zone of recirculation of the molten metal.
  • the present invention is intended to improve this situation.
  • a refractory assembly used in a regulating device of the said type and having, downstream form the pouring channel, at least two refractory plates essentially perpendicular to the axis of the channel and equipped with the respective orifices.
  • One of the plates is designed to slide relative to the other plate toward one side of the channel, from a pouring position in which the respective orifices essentially communicate to a pouring stop position in which the plates essentially close off their mutual orifice.
  • the refractory assembly also has injection means essentially upstream form the plates for a fluid capable of cooperating mechanically with the molten metal to avoid deposits in the said recirculation zone.
  • the refractory assembly has an internal nozzle with an essentially cylindrical, hollow form upstream from the plates.
  • the internal wall of this nozzle delimits the said pouring channel.
  • the injection means are designed to inject the fluid in directions essentially radial to the nozzle, in an angular sector less than 360° and opposite the side of the channel with regard to the sliding plate when it is in the closure position. The molten metal is thus perturbed locally by the injected fluid and mechanically (even thermally) isolated, from the wall in the recirculation zone.
  • the said angular sector is preferably less than or equal to about 270°, so as to concentrate the fluid flux more intensely in the zone of molten metal recirculation.
  • the angular sector is preferably close to 120°.
  • the internal nozzle has in an essentially transversal section a recess that communicates with the interior of the pouring channel and forms a crown of angular sector less than 360°. The fluid is then injected through this recess.
  • This recess preferably accommodates an insert effected in a porous refractory material, in which the fluid is injected toward the inside of the pouring channel.
  • - figure 1 is a partial schematic view, in longitudinal section, of a refractory assembly for a regulating device according to the invention
  • - figure 2 is a view in longitudinal section of an internal nozzle of the device, according to a preferred implementation mode of the invention
  • FIG. 3 is a cross-sectional view of the nozzle shown in figure 2.
  • FIG. 1 schematically shows a refractory assembly for a regulating device for a molten metal pour (arrows C), notably in a steel-making or metallurgical installation.
  • the refractory assembly in the example described has three refractory plates, one of which, designated as 1, can slide between the other two, 2 and 3.
  • the three plates 1, 2 and 3 are essentially superposed and perpendicular to the pouring axis Z-Z, vertical in the example described.
  • Upstream from the plates, it has an internal refractory nozzle 4, designed to be seated at least partially in a pouring hole that has a bottom wall of a continuous casting distributor (not shown) in the example described.
  • the internal nozzle 4 constitutes an element of the pouring channel that connects the pouring distributor to an ingot mold of the installation.
  • the internal nozzle 4 is of an essentially cylindrical, hollow general form, its internal wall 43 (figure 2) delimiting a pouring channel 7. More particularly, the nozzle 4 is of an essentially truncated conical form.
  • the pouring channel 7 communicates with an aperture 20 of the upstream refractory plate 2.
  • the upstream plate 2 and the downstream plate 3 are fixed with regard to the internal nozzle 4, while the intermediate plate 1 can slide from a pouring position toward a pouring stop position (toward the right of Figure 1 , as shown), thus, displacement of the aperture 10 of the sliding intermediate plate 1, essentially along the horizontal X-X axis, allows regulating the pouring flow rate. Indeed, in the pouring position the aperture 10 communicates with the orifice 20 of the upstream plate 2 on the one hand and with the aperture 30 of the downstream plate 3 on the other.
  • the orifice 10 In the pouring stop position, the orifice 10 is offset toward the right of figure 1 and a portion of refractory plate 11 in the vicinity of the orifice 10 (shown to the left of the orifice 10 in Figure 1) sensibly closes off the orifice 20 of the upstream plate 2 on the one hand and the orifice 30 of the downstream plate 3 on the other.
  • the flow rate of pouring decreases, up to the point that the pouring is interrupted when the sliding plate 1 is in an extreme position corresponding to the said pouring stop position, on the other hand, when the axis of the orifice 10 is substantially merged with the pouring axis, the flow rate of pouring is maximal.
  • the molten metal encounters a first obstacle corresponding to the upper wall of the part 11 of the sliding plate 1, in the vicinity of orifice 10.
  • the respective apertures 20 and 10 of plates 2 and 1 sensibly offset relative to each other, form an essentially curved-in pouring trajectory C.
  • solid deposits of alumina and solidified steel can form in this zone 6, capable of perturbing the displacement of the sliding plate 1, even obstructing the orifice 20 of the upstream plate 2.
  • the general idea is to inject a fluid capable of cooperating mechanically with the molten metal so as to create a local turbulence and/ or a sleeve protecting the walls of the nozzle in order to counteract the formation of a deposit.
  • This fluid is chosen so as not to react chemically with the molten metal.
  • an inert gas such as argon is injected.
  • this injection is generally made all around the pouring axis Z-Z.
  • a circular aperture is provided that extends over 360° of the pouring channel for injecting the gas radialy.
  • this axisymmetric injection in no way resolves the problem posed by the recirculation in zone 6 and the resulting deposit.
  • the internal nozzle 4 has a recess 40 in its internal wall 43, which extends over an angular sector less than
  • the angular sector on which the recess 40 of the internal nozzle 4 extends is close to 120° in the example described ( Figure 3).
  • the recess 40 presents, in a cross section of the nozzle ( Figure 3), a form of crown or collar of angular cross section A less than 270° and close to 120° in the example.
  • the internal nozzle 4 has a circular slot 41 for supplying the fluid from the external connector 46 up to the injection zone 5.
  • the slot 41 is prolonged locally by an orifice 42 that communicates with the recess 40 and through which the gas is injected (arrow F).
  • the gas F is introduced into the pores of the insert 5 by being directed essentially in a transversal plane and in an angular sector close to 120°, toward the center of the channel 7.
  • a localized injection of the fluid advantageously makes it possible to limit, even prevent the formation of a deposit in the zone 6, in particular, when the pouring trajectory is essentially curved inward, the sliding plate 1 being in an intermediate position ( Figure 1), defining a pouring flow rate less than the maximum flow.
  • the present invention is not limited to the implementation form described previously by means of example. It also extends to other variants.
  • Another implementation form consist of seating a metal pipe in the body of the nozzle, connecting the external connector 46 directly to the slot 41.
  • the injection of fluid can also be effected through a plurality of orifices arranged in a plane essentially perpendicular to the axis of the nozzle 4 and distributed over an angular sector less than 360°, e.g., close to 120°.
  • the nozzle 4 can have a slot in a plane essentially perpendicular to its axis Z-Z, and which extends over an angular sector less than 360°, according to a general characteristic of the invention.
  • the upstream plate 2 having such injection means, requires a boss (also named spigot) on its upper surface, around its orifice 20.
  • This boss which has a slot, a plurality of orifices or even a porous insert for injecting the fluid, extends toward the internal nozzle, with a significant height along the axis of pouring Z-Z to effect an effective injection of the fluid. It is also necessary to provide a homologous recess in a lower part of the nozzle for accommodating this boss.
  • the refractory assembly according to the invention with an intermediate sliding plate 1 having a porous refractory insert and secondary injection means (arrows F ⁇ in the direction of sliding of the plate 1 from its stop position to its pouring position (from the right to the left in Figure 1) in order to eliminate a possible deposition associated with the recirculation of metal above the upper face of a part 31 of the downstream plate 3 in the proximity of its orifice 30 (to the right of the orifice 30, as shown in Figure 1).
  • This secondary injection extends preferably over an angular sector less than 360°.
  • a porous insert or any other means of injection of the fluid can also be located in the downstream plate 3, on the side opposite the closure of the sliding plate 1 in order to protect the zone under the sliding plate, to the left of its pouring aperture from a possible recirculation.
  • the refractory assembly has three superposed refractory plates, one of the plates, the intermediate one, sliding between the other two.
  • only two refractory plates 1 and 2 can be provided downstream from the nozzle 4.
  • the lower plate 1 is then designed to slide relative to the plate 2 toward a side 45 of the channel.
  • the sliding plate 1 is generally located below the fixed plate 2, while the principal injection of fluid is always done from the side of the channel opposite the side 45, toward which the sliding plate 1 is displaced from its pouring position to its stop position.
  • the internal nozzle 4 and the upstream plate 2 are made of a single monoblock refractory piece.
  • the internal nozzle 4 is a refractory piece that is generally part of the upper zone of the refractory assembly designed to connect a continuous casting distributor to an ingot mold of the pouring installation.
  • this nozzle can be part of a refractory assembly connecting a pouring ladle to the distributor, or an electric furnace to a pouring ladle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Sliding Valves (AREA)

Abstract

Ensemble réfractaire pour un dispositif destiné à réguler une vitesse de coulée, qui est situé en aval d'un canal de coulée (7). Ledit ensemble comporte au moins deux plaques réfractaires (1, 2) perpendiculaires à un axe du canal (Z-Z) et équipées d'orifices respectifs (10, 20). En amont des plaques, ledit dispositif comporte un moyen d'injection d'un fluide (F) capable de coopérer mécaniquement avec la coulée (C). Selon la présente invention, cette injection est effectuée en amont des plaques et dans un secteur angulaire du canal (7) inférieur à 360°, dans le sens de déplacement (X-X) de la plaque coulissante (1) vers sa position d'arrêt.
PCT/BE1999/000170 1999-01-06 1999-12-23 Ensemble refractaire WO2000040358A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AU18511/00A AU755773B2 (en) 1999-01-06 1999-12-23 Refractory assembly
KR1020017008495A KR20010089763A (ko) 1999-01-06 1999-12-23 내화 조립체
AT99962002T ATE223272T1 (de) 1999-01-06 1999-12-23 Feuerfeste anordnung
JP2000592096A JP2002534267A (ja) 1999-01-06 1999-12-23 耐火性アセンブリ
CA002356350A CA2356350A1 (fr) 1999-01-06 1999-12-23 Ensemble refractaire
BR9916777-8A BR9916777A (pt) 1999-01-06 1999-12-23 Conjunto refratário para um dispositivo de regulagem da velocidade de um vazamento
DE69902824T DE69902824T2 (de) 1999-01-06 1999-12-23 Feuerfeste anordnung
EP99962002A EP1148961B1 (fr) 1999-01-06 1999-12-23 Ensemble refractaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR99/00061 1999-01-06
FR9900061 1999-01-06

Publications (1)

Publication Number Publication Date
WO2000040358A1 true WO2000040358A1 (fr) 2000-07-13

Family

ID=9540649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BE1999/000170 WO2000040358A1 (fr) 1999-01-06 1999-12-23 Ensemble refractaire

Country Status (12)

Country Link
EP (1) EP1148961B1 (fr)
JP (1) JP2002534267A (fr)
KR (1) KR20010089763A (fr)
CN (1) CN1126622C (fr)
AR (1) AR022200A1 (fr)
AT (1) ATE223272T1 (fr)
AU (1) AU755773B2 (fr)
BR (1) BR9916777A (fr)
CA (1) CA2356350A1 (fr)
DE (1) DE69902824T2 (fr)
TW (1) TW495401B (fr)
WO (1) WO2000040358A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004098817A1 (fr) * 2003-05-07 2004-11-18 Equipment Merchants International, Inc. Element d'arret coulissant d'ecoulement metallique dans un processus de coulage
US9574412B2 (en) 2011-05-27 2017-02-21 Schlumberger Technology Corporation Proppant mixing and metering system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101804451B (zh) * 2010-04-22 2011-09-28 新兴铸管股份有限公司 离心浇铸钢管或钢管坯的控流浇铸机构
DE112018002077A5 (de) * 2017-04-20 2020-01-02 Ksm Castings Group Gmbh Trennschiebersystem, Gießanlage und Gießverfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160570A (en) * 1981-03-30 1982-10-02 Kurosaki Refract Co Ltd Sliding nozzle device having gas blowing part in anticipated negative pressure or vortex generating zone
FR2554023A1 (fr) * 1983-11-02 1985-05-03 Toshiba Ceramics Co Dispositif de decharge de metal fondu
JPH03198952A (ja) * 1989-12-27 1991-08-30 Sumitomo Metal Ind Ltd 連続鋳造における給湯方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57160570A (en) * 1981-03-30 1982-10-02 Kurosaki Refract Co Ltd Sliding nozzle device having gas blowing part in anticipated negative pressure or vortex generating zone
FR2554023A1 (fr) * 1983-11-02 1985-05-03 Toshiba Ceramics Co Dispositif de decharge de metal fondu
JPH03198952A (ja) * 1989-12-27 1991-08-30 Sumitomo Metal Ind Ltd 連続鋳造における給湯方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 001 (M - 183) 6 January 1983 (1983-01-06) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 463 (M - 1183) 25 November 1991 (1991-11-25) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004098817A1 (fr) * 2003-05-07 2004-11-18 Equipment Merchants International, Inc. Element d'arret coulissant d'ecoulement metallique dans un processus de coulage
US9574412B2 (en) 2011-05-27 2017-02-21 Schlumberger Technology Corporation Proppant mixing and metering system
US10065812B2 (en) 2011-05-27 2018-09-04 Schlumberger Technology Corporation Proppant mixing and metering system

Also Published As

Publication number Publication date
ATE223272T1 (de) 2002-09-15
AR022200A1 (es) 2002-09-04
DE69902824D1 (de) 2002-10-10
EP1148961B1 (fr) 2002-09-04
CA2356350A1 (fr) 2000-07-13
DE69902824T2 (de) 2003-05-22
JP2002534267A (ja) 2002-10-15
AU1851100A (en) 2000-07-24
BR9916777A (pt) 2002-04-23
CN1332660A (zh) 2002-01-23
CN1126622C (zh) 2003-11-05
KR20010089763A (ko) 2001-10-08
AU755773B2 (en) 2002-12-19
EP1148961A1 (fr) 2001-10-31
TW495401B (en) 2002-07-21

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