EP0048641B1 - Vorrichtung zum Schützen geschmolzenen Metalls in Schieberverschlüssen - Google Patents

Vorrichtung zum Schützen geschmolzenen Metalls in Schieberverschlüssen Download PDF

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Publication number
EP0048641B1
EP0048641B1 EP81401315A EP81401315A EP0048641B1 EP 0048641 B1 EP0048641 B1 EP 0048641B1 EP 81401315 A EP81401315 A EP 81401315A EP 81401315 A EP81401315 A EP 81401315A EP 0048641 B1 EP0048641 B1 EP 0048641B1
Authority
EP
European Patent Office
Prior art keywords
gas
nozzle
metal
supply means
distribution means
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
Application number
EP81401315A
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English (en)
French (fr)
Other versions
EP0048641B2 (de
EP0048641A1 (de
Inventor
Albert-Gilbert Goursat
Thierry Hersant
Jacques Nicolas
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9245923&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0048641(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT81401315T priority Critical patent/ATE10915T1/de
Publication of EP0048641A1 publication Critical patent/EP0048641A1/de
Publication of EP0048641B1 publication Critical patent/EP0048641B1/de
Application granted granted Critical
Publication of EP0048641B2 publication Critical patent/EP0048641B2/de
Expired 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
    • B22D41/14—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 relates to the protection of the pouring jet of a molten metal contained in a container and passing through a plate shutter device comprising a fixed plate and a movable plate provided with at least one nozzle.
  • shutter devices control the opening and closing of the container, pocket or distributor tap hole, the nozzle being able to come into communication with said tap hole. They therefore make it possible to pour the molten metal, for example steel, into an ingot mold or the like.
  • the pouring of molten metal can be done directly from the relative in the ingot mold or, in the continuous casting box, from the ladle in a distributor and then in the ingot mold.
  • the two plates are made of a material resistant to high temperatures such as ceramic or impregnated or tarred alumina.
  • the movable plate can be sliding or rotary and be provided with a single nozzle or with several nozzles of different internal diameters. In the latter case, by changing the nozzle, it is possible to modify the casting speed as a function, for example, of the height of the metal in the container.
  • the two plates can be applied against each other by means of a spring system provided with a cooling circuit.
  • the currently known shutter devices have numerous passage locations for atmospheric air which is truly sucked in as a result of the depression caused by the flow of molten metal. These shutters increase the risk of occlusion of air bubbles in the metal during casting and therefore the risk of oxidation.
  • the places through which air penetrates to the metal are: the gap between the two opposite faces of the fixed and movable plates due to the play necessary for their relative movement; the connection zone between the nozzle (s) and the movable plate, in particular when the said nozzle (s) are removably mounted on the said plate; the outlet end of the nozzle; the connection between the fixed plate and the container as well as, in the case of nozzles permanently mounted on the movable plate, the connection between said nozzle and said plate, these connections being made by masonry using a cement screed inherently not gas tight and which becomes more and more porous due to the cracks which appear with use.
  • This device which is a shutter device of the type comprising a fixed plate and a sliding plate provided with a pouring nozzle, comprises a reservoir of neutral gas which surrounds the lower part of said nozzle.
  • the supply of neutral gas at the base of the pouring nozzle ensures the protection of the molten metal after it leaves said nozzle.
  • This device has the drawback of not ensuring the protection of the jet of molten metal during its passage through the plate closure member; thus, during this crossing, the metal jet is exposed to the oxidizing action of the air which infiltrates between the plates or between the nozzle and the movable plate.
  • the present invention aims to eliminate the aforementioned drawbacks and proposes, for this purpose, a plate shutter device of the type comprising a fixed plate, a movable plate provided with a nozzle at least capable of coming into communication with the tap hole. , and gas supply and distribution means connected to a gas source that is practically inert with respect to the metal. It is characterized in that the abovementioned members comprise at least one circular groove hollowed out on at least one of the faces in mutual contact with the plates, these grooves surrounding, over their entire periphery, the orifices which pass through said plates.
  • the introduction into the shutter device of a gas which is practically inert via the metal, gas which is delivered by the gas source at a pressure slightly higher than atmospheric pressure , and the distribution of this gas around the metal as it passes through said device makes it possible to isolate it from the ambient air by a continuous gaseous protection barrier.
  • a continuous gaseous protection barrier prevents the passage of ambient air and therefore its oxidizing action.
  • this gas barrier being constituted by a gas that is practically inert with respect to the treated metal, that is to say devoid of chemical action on this metal, or at least of which the chemical action, if it exists , can be neglected, does not entail any risk of harming the quality of the final product.
  • the movable plate further comprises a channel communicating with the groove or grooves and opening into the junction zone between the movable plate and the nozzle.
  • the abovementioned supply and distribution members comprise a housing enveloping the shutter device and provided with at least one orifice for the evacuation of the gas and the passage of the jet. of casting.
  • the abovementioned supply and distribution members comprise an annular porous ring disposed in the vicinity of the outlet orifice of the nozzle and supplied with gas in the gas phase.
  • the aforementioned supply and distribution members comprise an annular collar disposed in the vicinity of the outlet orifice of the nozzle and supplied with gas in the liquid phase.
  • the abovementioned supply and distribution members may comprise at least one recess formed in at least one of the aforementioned plates and communicating with the gap between the faces in mutual contact of said plates.
  • a metal container 1 for example a ladle, consisting of an external metal breastplate 2 and an internal coating 3 of refractory material, has a bottom wall provided with a interchangeable socket 5, also made of refractory material, in which the taphole 6 is formed.
  • a taphole shutter device 6 according to the invention and designated d '' generally by reference 10.
  • the device 10 essentially comprises a fixed plate 11 and a movable plate 12 applied one against the other along their face 11a and 12a respectively by a spring system not shown, the movable plate 12 being mounted rotatably about an axis XX 'and carrying two nozzles 13, these nozzles being made, like the plates 11 and 12, of a refractory material, for example an impregnated alumina.
  • the plate 11 is crossed by an orifice 110, placed in alignment with the tap hole 6, while the movable plate 12 is crossed by two passages such as 120 (only one is shown).
  • Each nozzle 13, crossed by an internal channel 130 (only one is shown), is provided with a metal external armor 131 and permanently mounted on the plate 12 by means of said armor 131 and a metal support 121 integral with said plate, so that its channel 130 is in alignment with the passage 120.
  • By rotation of the plate 12 one therefore brings one or the other of the nozzles 13 (the left nozzle in FIG. 1) in communication with the tap hole 6.
  • the plate 11 is provided with a recess constituted by a circular groove 111 hollowed out on its face 11 a, concentrically with the orifice 110, and consequently communicating with the gap 11 ⁇ -12a between the two plates.
  • Two perpendicular conduits communicating with each other, 112 and 113, are drilled in the mass of the plate 11.
  • the conduit 113 opens directly into the groove 111 while the conduit 112 is connected, via a tube 14, to a pressurized inert gas source 20, equipped with a detector 21.
  • the inert gas can be nitrogen, argon, a nitrogen-argon mixture or in the case of aluminum metallurgy for example , of CO 2 .
  • the groove 111 as well as the conduits 112 and 113 therefore constitute organs for supplying and distributing the gas delivered by the source 20, this gas forming, between the two plates 11 and 12 and around the channel formed by the orifices 6, 110 , 120 and 130, a gas barrier that prevents ambient air from reaching the flowing metal.
  • the movable plate 12 which is provided with a recess constituted by a circular groove 122 hollowed out on its face 12a concentrically with passage 120 and thereby communicating with the gap 11a-12a.
  • Two perpendicular conduits and communicating with each other 123 and 124 are drilled in the mass of the plate 12.
  • the conduit 124 opens directly into the groove 122 while the conduit 123 is connected, via a tubular 125, to the source 20.
  • each of these passages may be provided with a groove such as 122, or a single groove may be provided surrounding all of the passages .
  • the nozzle 14, the central channel of which is designated by 140, is, unlike the nozzles 13 in FIG. 1, removably mounted on the plate 12, this thanks to an appropriate system of known type, for example with bayonet.
  • the breastplate 141 of the nozzle 14 and the ring 142 carried on the support 121 are provided with latching means (not shown) which allow the nozzle to be held on the plate.
  • a channel 126 is drilled in the plate 12 perpendicular to the conduit 123 and communicating with the latter, this channel 126 opening into the junction zone 127 between nozzle and plate. Under these conditions, the inert gas fills the zone 127 thus creating a protective barrier around the flowing metal.
  • the pressure of the inert gas is adjusted by means of the pressure reducer 21, so as to obtain in the grooves 111 or 122, an overpressure of a few millimeters of water relative to the local atmospheric pressure.
  • a gaseous protective barrier is also created at the lower end of the nozzle 14, that is to say at the outlet of the jet of liquid metal.
  • the inert gas supply and distribution members comprise, in this case, an annular distributor constituted by a porous ring of refractory material 144 housed in a recess 145 formed at the outlet of the nozzle 14, this ring being connected, by a tubing 146, at source 20.
  • the flow of inert gas from the ring 144 makes it possible to compensate for the depression caused by the emergence at high speed of the metal jet and prevents atmospheric air from reaching said metal.
  • FIG. 3 A first alternative embodiment of the gaseous protective barrier at the outlet opening of the nozzle is shown in Figures 3 and 4.
  • the nozzle 15, provided with a central channel 150 and a breastplate 151 comprises, at its lower part, an annular groove 152 into which tangentially opens a tube 153 connected to a source of inert gas under pressure (not shown). Between this groove 152 and the lower end of the nozzle, the refractory material has a smaller thickness, thus providing a channel 154 extending the channel 150 but having a larger diameter.
  • the nozzle 16 provided with a central channel 160 and a breastplate 161 , comprises, at its lower part, a distributor constituted by a metallic flange 162 in the form of a trough that is extended, in the direction of the outlet end of said nozzle, a sleeve also metallic 163 which forms a coating on the breastplate 161, the nozzle being deprived, in this part, of refractory material.
  • a distributor constituted by a metallic flange 162 in the form of a trough that is extended, in the direction of the outlet end of said nozzle, a sleeve also metallic 163 which forms a coating on the breastplate 161, the nozzle being deprived, in this part, of refractory material.
  • a tube 164 connected to a source of inert gas in liquefied form (not shown) and delivering said gas in the liquid phase.
  • the collar 162 and the sleeve 163 are metallic, for example made of mild steel, has the consequence of facilitating the transmission of calories from the metal jet and consequently of accelerating the passage from liquid phase to gaseous phase, the latter forming the desired protective barrier.
  • the flow rate of the liquefied gas can be adjusted so that only a part is vaporized in the flange 162.
  • the excess liquid phase then flows along the jet of metal and spreads over the surface of the bath, forming a protective liquid layer.
  • the device 10 is provided with a metal casing or cover 17 which is mounted in leaktight manner on the bottom of the container and which almost completely envelops said device, only an opening 170 being provided at its lower part for the passage of the nozzles 13 and the flow of the metal jet.
  • This box 17 is supplied with inert gas under pressure by a source (not shown) such as the previous source 20, and maintains, around the device 10, an atmosphere which constitutes an effective protective barrier against atmospheric air. The gas escapes through the opening 170 thus forming, around the nozzles and the metal jet, an inert gas flow.
  • This housing also protects the device 10 against metal splashes.
  • the device 10 being assumed to have no spring system for holding the plates 11 and 12 against each other, therefore a cooling circuit, the inert gas is brought directly inside the housing 17 by a tube 171 integral with the latter.
  • the device is assumed to be equipped with a spring system associated with a compressed air cooling circuit.
  • This spring system represented schematically and designated by the reference 18, comprises a stop 181 in the form of an inverted cup open at its lower end and integral with the plate 12, a support piece 182 in the form of a piston integral with the plate 11 and a spring 183 interposed between the stop 181 and the part 182.
  • a tube 184 allows the supply of compressed cooling air into the stop 181, this air circulating, by ducts not shown, in the other identical elements of the system to springs.
  • the tube 184 is connected not to a source of compressed air, but to the source of pressurized inert gas, so that the housing 17 is supplied via the cooling circuit of the spring system.
  • the housing 17 is provided with an orifice 172 for the passage of the tubing 184.
  • the grooves 111 and 122 of the fixed plate 11 and the movable plate 12 could have a shape other than circular, for example elliptical.
  • the groove 152 and in the collar 162 of the nozzles 15 and 16 respectively could tangentially open several pipes such as 153 and 164 instead of just one.

Landscapes

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

Claims (5)

1. Verschlußvorrichtung mit Schiebern (10) für ein Stichloch (6) eines Behälters (1) mit einem geschmolzenen Metall, mit einem festen Schieber (11), einem beweglichen Schieber (12), der mit mindestens einem Gießrohr (13), (14), (15), (16), versehen ist, die mit dem Stichloch (6) in Verbindung kommen können und mit Gaszuführ- und Gasverteilungsorganen (111, 122), die mit einer Quelle (20) für dem Metall gegenüber praktisch inertes Gas verbunden ist, dadurch gekennzeichnet, daß die genannten Zuführ- und Verteilungsorgane mindestens eine kreisförmige Auskehlung (111), (122) aufweisen, die auf mindestens einer der in gegenseitiger Berührung mit den Schiebern (11, 12) stehenden Vorderflächen (11a, 12a) vertieft ist, wobei diese Auskehlungen auf der Gesamtheit ihres Umfanges die Öffnungen (110, 120) umgeben, welche durch diese Schieber hindurchgehen.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der bewegliche Schieber ferner einen Kanal (126) aufweist, der mit der Auskehlung (122) in Verbindung steht und in der Verbindungszone (127) zwischen dem beweglichen Schieber (12) und dem Gießrohr (14) mündet.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zuführ- und Verteilungsorgane ein Gehäuse (17) aufweisen, welches die Vorrichtung (10) umhüllt und mit mindestens einer Öffnung (170) für das Abziehen des Gases und den Durchgang des Gießstrahles ausgestattet ist.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zuführ- und Verteilungsorgane einen porösen Ring (144) aufweisen, der in der Nachbarschaft der Austritsöffnung des Gießrohres (14) angeordnet und mit Gas in Gasphase versorgt ist.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zuführ- und Verteilungsorgane einen Ringkragen (162) aufweisen, der in der Nachbarschaft der Austrittsöffnung des Gießrohres (16) angeordnet und mit Gas in flüssiger Phase versorgt ist.
EP81401315A 1980-09-15 1981-08-18 Vorrichtung zum Schützen geschmolzenen Metalls in Schieberverschlüssen Expired EP0048641B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401315T ATE10915T1 (de) 1980-09-15 1981-08-18 Vorrichtung zum schuetzen geschmolzenen metalls in schieberverschluessen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8019837 1980-09-15
FR8019837A FR2490123A1 (fr) 1980-09-15 1980-09-15 Dispositif obturateur a plaques pour trous de coulee de recipient contenant un metal en fusion

Publications (3)

Publication Number Publication Date
EP0048641A1 EP0048641A1 (de) 1982-03-31
EP0048641B1 true EP0048641B1 (de) 1984-12-27
EP0048641B2 EP0048641B2 (de) 1989-09-20

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ID=9245923

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Application Number Title Priority Date Filing Date
EP81401315A Expired EP0048641B2 (de) 1980-09-15 1981-08-18 Vorrichtung zum Schützen geschmolzenen Metalls in Schieberverschlüssen

Country Status (10)

Country Link
US (1) US4480770A (de)
EP (1) EP0048641B2 (de)
JP (1) JPS5752564A (de)
AR (1) AR225364A1 (de)
AT (1) ATE10915T1 (de)
AU (1) AU543563B2 (de)
CA (1) CA1186146A (de)
DE (1) DE3167942D1 (de)
FR (1) FR2490123A1 (de)
ZA (1) ZA815454B (de)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
AT392348B (de) * 1985-02-23 1991-03-11 Stopinc Ag Verfahren zum abgiessen von metallschmelze aus einem ein absperrorgan aufweisenden behaelter
DE4007993A1 (de) * 1990-03-13 1991-09-19 Zimmermann & Jansen Gmbh Schieberverschluss fuer ein metallurgisches giessgefaess, insbesondere eine giesspfanne

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FR2523007A1 (fr) * 1982-03-15 1983-09-16 Air Liquide Procede et installation de protection d'un jet de coulee de metal liquide
DE3226047C2 (de) * 1982-07-12 1985-11-28 Didier-Werke Ag, 6200 Wiesbaden Verbindung zwischen dem Auslaufkonus des Verschlusses eines Gießgefäßes für Metallschmelze und dem daran anschließenden Schutzrohr
FR2530167A1 (fr) * 1982-07-13 1984-01-20 Air Liquide Procede et installation de protection d'un jet de coulee de metal liquide
JPS6099462A (ja) * 1983-11-02 1985-06-03 Toshiba Ceramics Co Ltd 溶融金属排出装置
CA1251642A (en) * 1983-11-02 1989-03-28 Kazumi Arakawa Molten metal discharging device
DE3342071C2 (de) * 1983-11-22 1986-08-07 Didier-Werke Ag, 6200 Wiesbaden Vorrichtung zum Abschirmen eines metallischen Gießstrahls
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US4649493A (en) * 1983-12-30 1987-03-10 Westinghouse Electric Corp. Tube expansion apparatus
CH662762A5 (de) * 1984-05-23 1987-10-30 Stopinc Ag Drehschiebeverschluss fuer metallurgische schmelzgefaesse.
IT1176428B (it) * 1984-07-18 1987-08-18 Radex Italiana Spa Manicotto di uscita in un dispositivo per controllare l'efflusso di acciaio fuso da una siviera o da una paniera
US4887748A (en) * 1986-12-29 1989-12-19 J. W. Hicks, Inc. Apparatus and method for attachment of submerged nozzle to lower plate of sliding gate valve mechanism for a continuous casting operation
BE1001239A3 (fr) * 1987-12-03 1989-08-29 Vesuvius Internat Corp Procede pour rendre etanche a l'air une fermeture coulissante et plaque refractaire d'usure prevue a cet effet.
US4949885A (en) * 1989-02-23 1990-08-21 Inland Steel Company Apparatus and method for containing inert gas around molten metal stream
US5067552A (en) * 1989-07-26 1991-11-26 Ltv Steel Company, Inc. Shrouding for top pouring of ingots
DE4034652A1 (de) * 1990-10-31 1992-05-07 Didier Werke Ag Verbindung zwischen ausguss und giessrohr an metallurgischen gefaessen
BE1006006A3 (fr) * 1990-12-19 1994-04-19 Int Ind Eng Sa Piece refractaire pour trou de coulee d'un recipient siderurgique.
BE1004804A4 (fr) * 1991-05-21 1993-02-02 Internat Ind Engineering S A Ceinture d'etancheite d'un tube de coulee.
FR2684980B1 (fr) * 1991-12-16 1994-03-18 Kodak Pathe Procede de decomposition organometallique pour preparer un borate metallique.
FR2695335B1 (fr) * 1992-09-09 1994-11-18 Lorraine Laminage Tiroir linéaire de poche à acier.
JPH06310993A (ja) * 1993-04-21 1994-11-04 Aruinko Kk 受信機の表示装置
JP2575587B2 (ja) * 1993-04-21 1997-01-29 アルインコ株式会社 受信機の表示装置
BR9711940A (pt) 1996-10-17 2000-01-18 Vesuvius Crucible Co Instalação para transferir metal lìquido, e, processo para operar a mesma.
FR2757431B1 (fr) * 1996-12-20 1999-02-12 Vesuvius France Sa Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires
US6228187B1 (en) 1998-08-19 2001-05-08 Air Liquide America Corp. Apparatus and methods for generating an artificial atmosphere for the heat treating of materials
US6491863B2 (en) 2000-12-12 2002-12-10 L'air Liquide-Societe' Anonyme A' Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes George Claude Method and apparatus for efficient utilization of a cryogen for inert cover in metals melting furnaces
EP2091679B1 (de) * 2006-11-08 2011-05-18 Stopinc Aktiengesellschaft Einrichtung für einen behälter für nichteisenmetallschmelze mit verschlusseinheit und schutzhaube
KR101541138B1 (ko) 2008-12-16 2015-08-03 주식회사 동진쎄미켐 액정 화합물 및 그 제조방법
WO2020158465A1 (ja) * 2019-01-30 2020-08-06 Ｊｆｅスチール株式会社 スライディングノズル装置の制御方法及び鋳片の製造方法

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DE2731113A1 (de) * 1977-07-09 1979-01-18 Didier Werke Ag Ausgussformstein und verfahren zu seiner herstellung
JPS5420938A (en) * 1977-07-15 1979-02-16 Kawasaki Steel Co Winding method of hot strip
FR2403852A1 (fr) * 1977-09-22 1979-04-20 Air Liquide Procede et dispositif de protection d'un jet de coulee verticale de metal fondu au moyen d'un gaz inerte liquefie
US4199087A (en) * 1978-01-25 1980-04-22 United States Steel Corporation Apparatus for injection of inert gas to prevent superspeed effect
AT368415B (de) * 1979-02-20 1982-10-11 Voest Alpine Ag Einrichtung an einem metallurgischen gefaess mit einem schutzrohr

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392348B (de) * 1985-02-23 1991-03-11 Stopinc Ag Verfahren zum abgiessen von metallschmelze aus einem ein absperrorgan aufweisenden behaelter
DE4007993A1 (de) * 1990-03-13 1991-09-19 Zimmermann & Jansen Gmbh Schieberverschluss fuer ein metallurgisches giessgefaess, insbesondere eine giesspfanne

Also Published As

Publication number Publication date
ATE10915T1 (de) 1985-01-15
FR2490123A1 (fr) 1982-03-19
EP0048641B2 (de) 1989-09-20
ZA815454B (en) 1982-07-28
AU7389881A (en) 1982-03-25
AU543563B2 (en) 1985-04-26
DE3167942D1 (en) 1985-02-07
CA1186146A (fr) 1985-04-30
AR225364A1 (es) 1982-03-15
US4480770A (en) 1984-11-06
JPS5752564A (en) 1982-03-29
FR2490123B1 (de) 1983-12-09
EP0048641A1 (de) 1982-03-31

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