EP0585254B1 - Dichtband für giessrohr - Google Patents

Dichtband für giessrohr Download PDF

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Publication number
EP0585254B1
EP0585254B1 EP92909213A EP92909213A EP0585254B1 EP 0585254 B1 EP0585254 B1 EP 0585254B1 EP 92909213 A EP92909213 A EP 92909213A EP 92909213 A EP92909213 A EP 92909213A EP 0585254 B1 EP0585254 B1 EP 0585254B1
Authority
EP
European Patent Office
Prior art keywords
plate
sealing belt
vacuum
groove
tube
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
EP92909213A
Other languages
English (en)
French (fr)
Other versions
EP0585254A1 (de
Inventor
Stanislav Szadkowski
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.)
International Industrial Engineering SA
Original Assignee
International Industrial Engineering SA
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 International Industrial Engineering SA filed Critical International Industrial Engineering SA
Publication of EP0585254A1 publication Critical patent/EP0585254A1/de
Application granted granted Critical
Publication of EP0585254B1 publication Critical patent/EP0585254B1/de
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
    • B22D41/14—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
    • B22D41/28—Plates therefor
    • 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 present invention relates to a sealing belt of the device for discharging a steel bottom pouring container and / or of the device for supplying and exchanging a pouring tube, comprising an upper plate or reference applied from below and a fixed base plate carrying the pouring tube.
  • the invention finds wide application in the manufacture of refractory elements of a pouring tube changing device or a closing device with sliding plates for a metallurgical vessel from which the steel is discharged into a mold or an ingot mold.
  • the mechanically entrained air during casting causes metal to rise or the formation of exogenous blasts.
  • the oxidized metal tends to stick in the pouring tube and to give a film of oxides which, in the case of an ingot mold, can be the cause of skin defects.
  • Document FR-A-2227073 describes a shutter device with sliding plates in which the underside of the reference plate which forms the sliding surface has a simple groove extending in a U shape around the tap hole.
  • the groove is connected to a source of inert gas.
  • the spacing of the ends of the branches of the U is greater than the diameter of the tap hole.
  • This groove makes it possible to develop in the pores of the refractory materials which surround the taphole a gas pressure which opposes the ferrostatic pressure. and prevents steel from wetting refractory materials.
  • the main drawback of the simple groove is that the resulting security is insufficient.
  • the preventive measure is only a single precaution. In addition, it does not allow any control or detection of a possible anomaly.
  • the object of the present invention is to remedy these drawbacks by proposing a sealing belt intended to make airtight the closure of a steel bottom-pouring container or of a supply and exchange device.
  • a pouring tube comprising at least one reference plate and a movable or fixed plate applied from below against the bottom of the container.
  • the sealing belt provided around the taphole consists of two concentric grooves, formed in one or the other of the abovementioned plates and centered on the axis of the taphole, so as to delimit three distinct zones, namely a first inner annular zone surrounding the taphole, a second intermediate annular zone delimited by the two grooves and a third outer zone between the outer groove and the periphery of the plate, the outer groove being connected to a source of vacuum and the inner groove to a source of inert gas.
  • Creating a vacuum in the outer groove has a double advantage. It prevents any air infiltration into the enclosure between the two grooves and protects all the better the tap hole generally subjected to a vacuum by VENTURI effect. It therefore ensures the absence of air in the pouring jet and thus prevents metal rising and the formation of blisters.
  • the second advantage of creating a vacuum in the outer groove lies in the possibility of easily detecting the tightness of the sliding closure, using a pressure measurement probe.
  • the measuring probe must of course be installed near the outer groove in the suction channel.
  • the sealing belt is formed in a reference plate.
  • the refractory plate in which the sealing belt is formed can also be a fixed plate carrying the tube.
  • the refractory plate contains channels connecting the two aforementioned grooves, the outer groove to a source of vacuum and the inner groove to a source of inert gas.
  • the outer groove of the refractory plate is connected to a device creating the vacuum and to a device for measuring the vacuum.
  • a tundish distributor according to the invention, namely two devices for supplying and exchanging a pouring tube and a device for regulating a steel bottom-pouring container.
  • a regulating device with sliding plates or a device for supplying and exchanging a pouring tube a device generally designated by the notation reference 1, consists of a base plate 2 secured to a refractory material pouring tube having a pouring hole 3 of determined diameter and provided with an upper plate 4 intended to be applied by a groove 5 against a lip of an internal nozzle not shown.
  • the base plate 2 carries a pouring tube 6.
  • the base plate 2 is reinforced by a steel sheath 7. It is pushed upwards by means of springs or jacks not shown, which apply it against the reference or upper plate 4 (top plate).
  • the base plate 2 carrying the pouring tube 6 is capable of sliding along the upper plate 4 under the action of a displacement mechanism (preferably designed in the form of a pneumatic cylinder not shown) during the operation supply and exchange of a pouring tube.
  • a sealing belt made up of two grooves is formed in the underside of the top plate 4, between the outer edge of the base plate and the tap hole.
  • concentric annulars 8, 9 centered on the axis of the tap hole 3, so as to delimit three distinct concentric annular zones. (see figure 3)
  • the grooves 8 and 9 form airlocks isolated from each other and from the outside by the annular sealing zones 10, 11, 12 formed by the portions of surfaces in contact with the plates perfectly applied one against the other.
  • a means of measuring the vacuum in the outer groove 8 makes it possible to directly report any abnormal loss of vacuum before any risk of aspiration of air into the taphole.
  • the outer groove 8 is connected to a vacuum source, constituted for example by a water pump not shown or by a vacuum pump, by a radial channel 13 formed in the upper plate. (see figure 1).
  • This radial channel is also connected to a pressure measuring device, making it possible to monitor the vacuum prevailing in the external groove 8 and possibly to issue a signal in the event of the sealing of the contact seal of the plates.
  • the internal groove 9 is connected to a source of inert gas by a radial channel 14 formed in the top plate.
  • the pressure of the inert gas in the interior groove 9 is maintained slightly higher than atmospheric pressure by injection of inert gas.
  • any possible reduction in the pressure prevailing in the internal groove 9 is corrected by admitting fresh inert gas.
  • This adjustment is carried out, for example, by an automatic valve coupled to a measuring device making it possible to determine the pressure in the above-mentioned internal groove 9.
  • argon is used as an inert gas. Unlike nitrogen, which causes a certain nitriding of steel, argon protects the molten metal against any oxidation without causing a side effect capable of altering the quality of the metal.
  • the double groove 8, 9 according to the invention is not subject to accidental plugging. It is not likely to be contaminated by residues of molten metal when the tube 6 is slid to replace it with a new one since the metal flow is interrupted using a stopper rod during this operation.
  • the sealing device according to the invention is easy to maintain, thanks to the fact that any metal residue is eliminated under the action of gravity during a possible removal of the base plate 2.
  • FIG. 3 shows a top view of the upper face of the base plate 2 shown in FIG. 1.
  • Figure 4 shows in vertical section, similar to Figure 1, but with the sealing belt shown in Figure 5, that is to say formed in the upper surface of the base plate 2 of the pouring tube.
  • suction 13 and injection 14 inert gas channels of the base plate 2 of the pouring tube are always drilled in the upper plate 4, as shown in FIGS. 1, 3, 4 and 6.
  • the grooves 8 and 9 can be easily produced using a grinding wheel by removing material.
  • Channels 13 and 14 which connect grooves 8 and 9 to sources of inert gas or vacuum can be made by drilling as shown in Figures 1, 3, 4 and 6 or be provided during the manufacture of refractory plates.
  • a groove 5 for sealing the internal nozzle is formed in the upper face of the upper plate 4 (FIGS. 1 and 4) to be applied in leaktight manner against a lip, not shown, of an internal nozzle.
  • the invention also applies to a sliding plate control device in which the underside of the reference plate 4 which forms the sliding surface has two rectangular oblong grooves 8, 9 or U-shaped, nested one inside the other so as to be substantially equidistant at all points (fig. 1, 3).
  • the choice of the shape and the length of the double groove 8, 9 is made according to the amplitude of the movement of the movable plate 2, this is limited to a maximum value by the length of the surrounded overlap zone by the groove through which the inert gas is injected, and to a minimum value by the inside diameter of the taphole 3 of the movable plate 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Sealing Material Composition (AREA)
  • Continuous Casting (AREA)
  • Insulating Bodies (AREA)
  • Cable Accessories (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Claims (7)

  1. Dichtband für eine Vorrichtung zum Entleeren eines Gießbehälters der Hüttenindustrie durch den Boden, mit einer Ober- oder Bezugsplatte (4), die von unten an dem Boden des Behälters angreift, und einer ortsfesten oder beweglichen Basisplatte (2), die das Gießrohr trägt, dadurch gekennzeichnet, daß es aus zwei konzentrischen Nuten (8,9) besteht, die in der einen und/oder der anderen der besagten Platten gebildet sind und zur Achse des Gießkanals (3) zentriert sind, derart, daß sie drei diskrete Bereiche begrenzen und zwar einen inneren ringförmigen ersten Bereich (12), der den Gießkanal (3) umgibt, einen dazwischenliegenden ringförmigen zweiten Bereich (11), der von den beiden Nuten (8,9) begrenzt wird, und einen äußeren dritten Bereich (10), der zwischen der äußeren Nut (8) und dem Umfang der Platte liegt, und daß die äußere Nut (8) mit einer Unterdruckquelle und die innere Nut (9) mit einer Inertgasquelle verbunden ist.
  2. Dichtband nach Anspruch 1, dadurch gekennzeichnet, daß es in der Bezugsplatte (4) gebildet ist.
  3. Dichtband nach Anspruch 1, dadurch gekennzeichnet, daß es in einer ein Rohr (6) tragenden Basisplatte (2) gebildet ist.
  4. Dichtband nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die äußere Nut (8), die mit einer Unterdruckquelle verbunden ist, außerdem mit Mitteln zum Messen des Unterdrucks verbunden ist.
  5. Dichtband nach Anspruch 4, dadurch gekennzeichnet, daß die Mittel zum Messen des Unterdrucks mit akustischen und/oder visuellen Anzeigemitteln versehen sind, die einen Unterdruckverlust signalisieren.
  6. Feuerfeste Platte mit einem Dichtband nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie Kanäle zum Ansaugen (13) und zum Ausblasen (14) von Inertgas enthält, die die besagten Nuten (8,9) mit einer Unterdruckquelle oder einer Inertgasquelle verbinden.
  7. Feuerfeste Platte mit einem Dichtband nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kanäle der Basisplatte (2) des Gießrohres zum Ansaugen (13) und/oder Ausblasen (14) von Inertgas durch radiale Ansaugkanäle (13a) verlängert sind, die in der Oberplatte (4) gebildet sind.
EP92909213A 1991-05-21 1992-05-07 Dichtband für giessrohr Expired - Lifetime EP0585254B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9100475A BE1004804A4 (fr) 1991-05-21 1991-05-21 Ceinture d'etancheite d'un tube de coulee.
BE9100475 1991-05-21
PCT/BE1992/000016 WO1992020480A1 (fr) 1991-05-21 1992-05-07 Ceinture d'etancheite d'un tube de coulee

Publications (2)

Publication Number Publication Date
EP0585254A1 EP0585254A1 (de) 1994-03-09
EP0585254B1 true EP0585254B1 (de) 1995-01-25

Family

ID=3885511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909213A Expired - Lifetime EP0585254B1 (de) 1991-05-21 1992-05-07 Dichtband für giessrohr

Country Status (9)

Country Link
US (1) US5390902A (de)
EP (1) EP0585254B1 (de)
JP (1) JPH06507349A (de)
AT (1) ATE117608T1 (de)
BE (1) BE1004804A4 (de)
BR (1) BR9206040A (de)
DE (1) DE69201305T2 (de)
ES (1) ES2069425T3 (de)
WO (1) WO1992020480A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1008438A3 (fr) * 1994-06-23 1996-05-07 Int Ind Eng Sa Tube de coulee assemble a une plaque rapportee par une enveloppe metallique.
FR2745209B1 (fr) * 1996-02-27 1998-05-15 Fonderie Ctr Tech Ind Dispositif de tiroir pour reservoir contenant un metal en fusion
CN1072537C (zh) * 1996-10-17 2001-10-10 维苏维尤斯·克鲁斯布公司 耐火材料组合、耐火材料件及其气体供应调节方法
FR2757431B1 (fr) * 1996-12-20 1999-02-12 Vesuvius France Sa Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires
BE1013024A3 (fr) * 1998-12-15 2001-08-07 Internat Ind Engineering S A Tube de coulee.
EP1132163A1 (de) * 2000-03-07 2001-09-12 Vesuvius Crucible Company Gerillter feuerfester Formkörper für metallurgischen Guss, Zusammensetzung feuerfester Formkörper, Gussvorrichtung und Verfahren zur Wiederherstellung der Oberfläche eines feuerfesten Formkörpers
EP1142660A1 (de) * 2000-03-07 2001-10-10 Vesuvius Crucible Company Gerillter feuerfester Formkörper für metallurgischen Guss, Zusammensetzung feuerfester Formkörper und Gussvorrichtung der eine solche Zusammensetzung umfasst
WO2002047853A1 (de) * 2000-12-12 2002-06-20 Stopinc Aktiengesellschaft Feuerfestteil für einen giessrohrwechsler am ausguss eines metallschmelze enthaltenden gefässes
ATE510641T1 (de) * 2009-07-01 2011-06-15 Refractory Intellectual Prop AUSGIEßDÜSE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE449339A (de) * 1942-02-24
GB1472532A (en) * 1973-04-27 1977-05-04 Didier Werke Ag Sliding gate nozzles for metallurgical vessels
US4365731A (en) * 1977-01-27 1982-12-28 Didier-Werke, A.G. Refractory structures
FR2490123A1 (fr) * 1980-09-15 1982-03-19 Air Liquide Dispositif obturateur a plaques pour trous de coulee de recipient contenant un metal en fusion
BE891379A (fr) * 1981-12-07 1982-06-07 Vesuvius Internat Corp Procede pour rendre etanche a l'air un dispositif d'obturation d'une poche de coulee et dispositif prevu a cet effet
DE3331483C2 (de) * 1983-09-01 1985-09-26 Metacon AG, Zürich Einrichtung für feuerfeste Platten von Schieberverschlüssen
GB8521536D0 (en) * 1985-08-29 1985-10-02 British Steel Corp Molten metal teeming practice
US5004131A (en) * 1990-04-16 1991-04-02 Bethlehem Steel Corporation Molten metal slide gate valve
JPH04228256A (ja) * 1990-08-10 1992-08-18 Kurosaki Refract Co Ltd ノズル孔の断気構造

Also Published As

Publication number Publication date
WO1992020480A1 (fr) 1992-11-26
ATE117608T1 (de) 1995-02-15
DE69201305T2 (de) 1995-06-01
DE69201305D1 (de) 1995-03-09
US5390902A (en) 1995-02-21
JPH06507349A (ja) 1994-08-25
EP0585254A1 (de) 1994-03-09
ES2069425T3 (es) 1995-05-01
BE1004804A4 (fr) 1993-02-02
BR9206040A (pt) 1995-11-14

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