EP0703027B1 - Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter - Google Patents

Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter Download PDF

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Publication number
EP0703027B1
EP0703027B1 EP95402010A EP95402010A EP0703027B1 EP 0703027 B1 EP0703027 B1 EP 0703027B1 EP 95402010 A EP95402010 A EP 95402010A EP 95402010 A EP95402010 A EP 95402010A EP 0703027 B1 EP0703027 B1 EP 0703027B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
nozzle
hole
casting
vessel
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
EP95402010A
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English (en)
French (fr)
Other versions
EP0703027A1 (de
Inventor
Jean-Charles Daussan
Gérard Daussan
André Daussan
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.)
Daussan SAS
Original Assignee
Daussan SAS
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Filing date
Publication date
Application filed by Daussan SAS filed Critical Daussan SAS
Priority to DE29521463U priority Critical patent/DE29521463U1/de
Publication of EP0703027A1 publication Critical patent/EP0703027A1/de
Application granted granted Critical
Publication of EP0703027B1 publication Critical patent/EP0703027B1/de
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to a seal means intended for use in a metal pouring container liquid comprising at least one pouring opening constituted by a substantially frustoconical hole in which is axially engaged a pouring nozzle, this means forming seal being adapted to be introduced into a space ring formed between the hole and the periphery of the nozzle for fixing the nozzle in said hole, and being made from inorganic particles linked between them by a binder.
  • the present invention also relates to a container liquid metal casting comprising side walls and a bottom covered by a permanent coating refractory, the bottom comprising at least one orifice poured into the permanent coating of said bottom, this orifice being constituted by a substantially frustoconical hole in which is axially engaged a pouring nozzle, a annular space being provided between the coating hole permanent and the periphery of the nozzle to receive a seal means for fixing the nozzle in said hole.
  • Such a container can be a pouring container liquid metal such as a ladle or container transfer such as a flow distributor.
  • the permanent coating and especially the nozzle of casting are made of a very hard refractory material.
  • the pouring nozzle is linked by a layer of refractory cement on the surface of the hole frustoconical of a seat brick inserted in the permanent coating, or on the surface of a tapered hole formed directly in the permanent covering.
  • a cylinder is used which pushes the nozzle towards the interior of the container.
  • the graphite layer facilitates the release of the nozzle.
  • the application of seal on the inner wall of the orifice remains a tedious and delicate operation.
  • a metallurgical vessel in which the annular space between the coating hole and the periphery of the nozzle a thin (a few millimeters at most) and is filled with highly refractory fibrous material does not practically not reacting with the constituent materials joint surfaces.
  • This fibrous material is preferably molten kaolin in fibrous form.
  • the object of the present invention is to remedy these disadvantages.
  • the means forming a seal of the aforementioned type is characterized in that it consists of a prefabricated sleeve insertable in said hole and made from inorganic particles linked together by a binder which has a rate of predetermined degradation at the temperatures involved during the pouring said liquid metal.
  • This prefabricated sleeve is easy to install square. It is also easy to give it dimensions determined, so that it can adjust so precise, safe and reliable on the surface of the container hole as on the outer peripheral surface of the nozzle.
  • the sleeve Since the binder has a rate of predetermined degradation at the temperatures involved during the pouring of liquid metal, the sleeve loses part predetermined cohesion during said casting, and easily separates from permanent refractory lining without damage the peripheral surface of the frustoconical hole of this one after this pouring.
  • the particle size and composition of inorganic particles constituting the sleeve are chosen so that these particles, at the temperature of the liquid metal contained in container, do not completely sinter or sinter only weakly so as to create with the surfaces with which they are in contact with a friable bond.
  • the particles of the sleeve therefore do not risk strongly adhere to the surface of the coating hole permanent, and can be easily detached from this surface without damage to it.
  • this partial or weak sintering allows to maintain a certain cohesion of the particles inorganic to each other even if the binder has completely faded away.
  • the sleeve ensures an absolute seal compared to liquid metal.
  • the inorganic particles making up the sleeve are mainly particles of magnesia and / or silica.
  • the sleeve is thus simple to manufacture and little expensive.
  • the thickness of the prefabricated sleeve is between 15 and 35 mm, and the sleeve is thermally insulating.
  • the sleeve therefore provides a separation function and distance between the pouring nozzle and the permanent refractory lining. It also provides thermal insulation function between the nozzle and said coating.
  • the sleeve thus prevents cooling of the nozzle by the permanent coating during casting, this which limits the risks of metal freezing on the inner peripheral wall of the nozzle.
  • the container of the aforementioned type is characterized in that the seal means is a prefabricated insertable sleeve in said hole according to the first aspect of the invention.
  • Figure 1 partially shows a container casting, for example a continuous casting distributor, comprising a side wall 1 and a bottom 2 covered by a permanent coating 3 for example of refractory concrete.
  • the bottom 2 includes an orifice pouring 4 passing through the permanent coating 3 of the bottom 2.
  • This permanent coating 3 has a hole 6 substantially frustoconical, represented for example flared upwards, in which is axially engaged a pouring nozzle 7.
  • the bottom 2 includes a pouring orifice 4 passing through a seat brick 5 inserted in the permanent coating 3 of the bottom 2, the hole 6 crossing the seat brick 5 and receiving the nozzle 7.
  • An annular space is provided between the hole 6 of the permanent covering 3, or seat brick 5, and the periphery 8 of the nozzle 7.
  • the nozzle 7 has for this purpose a surface exterior 8 preferably of frustoconical shape substantially identical to the frustoconical interior shape of the hole 6.
  • a casting stopper 9 which closes the passage opening 4 of the nozzle 7.
  • the inner surface of the permanent coating 3 can be covered by a protective layer 10 in consumable material, for example (inorganic particles, fibers and binder) sinterable.
  • the annular space formed between the hole 6 of the permanent covering 3 or the seat brick 5 and the periphery 8 of the nozzle 7, is filled by a prefabricated sleeve 11 made up of inorganic particles maintained by a binder or a link with a predetermined degradation rate to temperatures involved during the pouring of the liquid metal.
  • the sleeve 11 keeps a some cohesion sufficient to ensure a seal perfect for liquid metal during casting, but present a certain friability which makes it possible to release easily fragments of the sleeve from the peripheral surface inside of hole 6.
  • the particle size and the composition of the inorganic particles are chosen so that these particles, at the temperature of the liquid metal contained in container, do not completely sinter or sinter only weakly so as to create with surfaces with which they are in contact a bond friable.
  • the sleeve adheres only weakly to surfaces with which it is in contact, and remains friable.
  • the inorganic particles making up the sleeve may be mainly particles of magnesia and / or silica.
  • a binder can be used classic mineral and / or organic which breaks down to temperatures involved during casting, partial sintering or weak particles holding the necessary cohesion of sleeve 11.
  • the weight composition of the mixture constituting the sleeve 11 can be as follows: mineral binder, for example sodium silicate: 0 to 20% refractory material in grains, for example crushed clay, chamotte, olivine, magnesia and their mixtures: 0 to 98% mineral fibers: 0 to 1% organic fibers: 0 to 2% organic binder, for example dextrin: 0 to 10% rheology agent, for example bentonite: 0 to 5%
  • a preferred composition by weight of the mixture constituting the sleeve 11 is for example the following: Cr 2 O 3 0.12 to 0.50% for example 0.25% SiO 2 18 to 22% 19.22% Al 2 O 3 0.10 to 0.40% 0.28% CaO 1 to 3% 2.00% MgO 60 to 75% 68.32% Fe 2 O 3 1.20 to 4% 2.82% Na 2 O 0 to 0.10% 0.01% H 2 O 0.50 to 2.50% 1.79% VS 1.7 to 3% 2.43% loss on ignition at 1000 ° C 3 to 5.5% 4.81%
  • the thickness of the annular space filled by the sleeve 11 can be between 15 and 35 mm approximately.
  • the sleeve 11 remains brittle, this which means that the sleeve 11 has not completely sintered or has only slightly sintered, due to the high temperature of the liquid metal contained in the container casting.
  • the bond created by weak sintering or by partial sintering between the sleeve 11 and the surfaces in contact is strong enough to prevent any risk of displacement of the nozzle under the effect of turbulence caused during casting in the metal liquid.
  • the partial sintering of the sleeve 11 is also favorable to make this sleeve sufficiently tight and avoid any risk of liquid metal leakage.
  • Partial sintering is obtained by choosing for the sleeve 11 a mixture of inorganic particles such that silica, alumina, magnesia whose particle size is not not too fine, because it promotes sintering.
  • the sleeve 11 thus ensures, by its thickening, a function of physical separation and distance between the pouring nozzle 7, on the one hand, and the permanent coating 3 or seat brick 5, on the other hand. It thus eliminates all the consequences of dilation of the nozzle during casting, and a mechanical removal of the nozzle after pouring.
  • the sleeve 11 preferably has a porosity open greater than 45% which gives it properties thermal insulation.
  • This open porosity can come from in particular the decomposition of the mineral binder and / or organic, and that of any organic fibers.
  • the sleeve 11 provides insulation significant thermal between the nozzle and the coating permanent. This prevents heat loss from the nozzle towards the permanent coating, and therefore allows a rapid heating of the nozzle before casting, less cooling of the nozzle during casting.
  • the composition of the sleeve 11 must be such that the sleeve does not adhere to the surface of hole 6 in the coating permanent, at the temperature of this surface. There is no against no inconvenience for the sleeve to adhere to the nozzle 7, the temperature of which is considerably higher than that of the permanent coating.
  • the prefabricated sleeve due to its dimensions precise with tight tolerances, allows mounting fast and accurate nozzle into hole 6.
  • a ring insulator 13 for example having the same composition and the same physical and thermal characteristics as the sleeve 11, is put in place above sleeve 11, the nozzle 7 and the permanent coating 3.
  • This ring 13 is preferably prefabricated like the sleeve 11.
  • the external surface of the nozzle 7 could include reliefs or hollows to achieve some anchoring of the sleeve 11 on the surface of the nozzle 7, so that upon extraction thereof, the sleeve 11 unmoulds at the same time from hole 6 and leaves thus the surface of this hole intact and smooth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (10)

  1. Dichtungsmittel zur Verwendung in einem Metallgießgefäß mit mindestens einer Gießöffnung (4), bestehend aus einem im wesentlichen kegelstumpfförmigen Loch (6), in dem ein Ausguß (7) axial festgelegt ist, wobei das Dichtungsmittel zum Einbringen in einen zwischen der Lochwandung (6) und dem Umfang (8) des Ausgusses (7) angeordneten Ringraum geeignet ist, um den Ausguß (7) in dem Loch (6) zu fixieren, und ausgehend von anorganischen Teilchen, die mittels eines Bindemittels untereinander verbunden sind, hergestellt ist, dadurch gekennzeichnet, daß es eine in das Loch (6) einsetzbare, vorgefertigte Muffe (11) ist und ausgehend von anorganischen Teilchen hergestellt ist, die mittels eines Bindemittels untereinander verbundenen sind, das bei den während des Gießens der Metallschmelze herrschenden Temperaturen einen vorbestimmten Zersetzungsgrad aufweist.
  2. Muffe nach Anspruch 1, dadurch gekennzeichnet, daß die Körnung und die Zusammensetzung der anorganischen Teilchen so gewählt sind, daß die Teilchen bei den während des Gießens der Metallschmelze in dem Gefäß herrschenden Temperaturen nicht vollständig schmelzen oder nur leicht schmelzen, so daß sie mit den Flächen, mit denen sie in Kontakt stehen, eine brüchige Verbindung bilden.
  3. Muffe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die die Muffe bildenden anorganischen Teilchen im wesentlichen Magnesium- und/oder Siliziumoxidteilchen sind.
  4. Muffe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Dicke der vorgefertigten Muffe ungefähr zwischen 15 und 35 mm liegt.
  5. Muffe nach einem der Ansprüche 1 bis 4, gekennzeichnet durch folgende gewichtsanalytische Zusammensetzung des die vorgefertigte Muffe bildenden Gemisches: anorganische Bindemittel 0 bis 20% körniges, hitzebeständiges Material 0 bis 98% anorganische Fasern 0 bis 1% organische Fasern 0 bis 2% organische Bindemittel 0 bis 10% Flußmittel 0 bis 5%
  6. Muffe nach Anspruch 5, gekennzeichnet durch folgende gewichtsanalytische Zusammensetzung des die vorgefertigte Muffe bildenden Gemisches: Cr2O3 0,12 bis 0,50% z.B. 0,25% SiO2 18 bis 22% 19,22% Al2O3 0,10 bis 0,40% 0,28% CaO 1 bis 3% 2,00% MgO 60 bis 75% 68,32% Fe2O3 1,20 bis 4% 2,82% Na2O 0 bis 0,10% 0,01% H2O 0,50 bis 2,50% 1,79% C 1,7 bis 3% 2,43% Glühverlust bei 1000°C 3 bis 5,5% 4,81%
  7. Muffe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie wärmeisolierend ist.
  8. Muffe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sie an der äußeren Umfangsfläche des Ausgusses (7) befestigt ist, bevor dieser in das Loch (6) eines Gefäßes eingesetzt wird.
  9. Metallgießgefäß, umfassend Seitenwände (1) und einen Boden (2), die mit einer feuerfesten Dauerauskleidung bedeckt sind, wobei der Boden (2) mindestens eine Gießöffnung (4) in der Dauerauskleidung (3) des Bodens (2) umfaßt, die Öffnung ein im wesentlichen kegelstumpfförmiges Loch (6) ist, in das axial ein Ausguß (7) eingreift, ein Ringraum zwischen der Lochwandung (6) der Dauerauskleidung und dem Umfang (8) des Ausgusses (7) zur Aufnahme eines Dichtungsmittels zur Fixierung des Ausgusses (7) in dem Loch (6) liegt und das Dichtungsmittel ausgehend von anorganischen Teilchen hergestellt ist, die mittels eines Bindemittels untereinander verbundenen sind, dadurch gekennzeichnet, daß das Dichtungsmittel eine in das Loch (6) einsetzbare, vorgefertigte Muffe (11) nach einem der Ansprüche 1 bis 8 ist.
  10. Gefäß nach Anspruch 9, dadurch gekennzeichnet, daß ein vorgefertigter, isolierender Ring (13) von oberhalb der Muffe (11), des Ausgusses (7) und der feuerfesten Dauerauskleidung (3) eingesetzt ist.
EP95402010A 1994-09-05 1995-09-05 Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter Expired - Lifetime EP0703027B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29521463U DE29521463U1 (de) 1994-09-05 1995-09-05 Verbindungsteil zur Verwendung in einem Behälter für eine Schmelze aus flüssigem Metall

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9410619 1994-09-05
FR9410619A FR2724128A1 (fr) 1994-09-05 1994-09-05 Dispositif pour faciliter l'extraction d'une busette de l'orifice de coulee d'un recipient de coulee de metal liquide
US08/811,929 US5858260A (en) 1994-09-05 1997-03-05 Molten metal pouring container and prefabricated sleeve for fixing a nozzle in a container of this kind

Publications (2)

Publication Number Publication Date
EP0703027A1 EP0703027A1 (de) 1996-03-27
EP0703027B1 true EP0703027B1 (de) 1998-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402010A Expired - Lifetime EP0703027B1 (de) 1994-09-05 1995-09-05 Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter

Country Status (4)

Country Link
US (1) US5858260A (de)
EP (1) EP0703027B1 (de)
DE (1) DE69501932T2 (de)
FR (1) FR2724128A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044916A1 (de) * 2010-09-09 2012-03-15 Thermat Industrieofen Gmbh Füllrohr flachdichtend in Einheit mit Einfülltrichter für druckgasbetätigte Dosieröfen für NE-Metalle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE526728C2 (sv) * 2003-12-11 2005-11-01 Pergo Europ Ab Ett förfarande för framställning av paneler med en dekorativ yta
DE102005061291B4 (de) * 2005-12-20 2008-01-03 Heraeus Electro-Nite International N.V. Keramischer Lochstein und metallurgisches Gefäß
BRPI0718655A2 (pt) * 2006-11-06 2013-11-19 Krosakiharima Corp Tijolo de manga de alta durabilidade
RU2490092C2 (ru) * 2009-01-21 2013-08-20 Рефректори Интеллекчуал Проперти Гмбх Унд Ко Кг Погружной разливочный стакан
EP2444177A1 (de) * 2010-10-20 2012-04-25 Vesuvius Group S.A Gießrohr für flüssige Metal
CN114378290B (zh) * 2021-12-13 2024-03-19 首钢京唐钢铁联合有限责任公司 一种中间包上水口安装方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395840A (en) * 1966-07-15 1968-08-06 Vesuvius Crucible Co Nozzle for a bottom pour ladle for molten metal
GB1363855A (en) * 1970-12-23 1974-08-21 Stopinc Ag Metallurgical vessels
US3735906A (en) * 1971-03-15 1973-05-29 Juten M A Washington Replaceable molten metal nozzle structure
DE2731051C3 (de) * 1977-07-06 1980-09-25 Daishin Kako Co., Ltd., Tokio Haft- und Trennmittel für eine in der Ausgußöffnung einer Gießpfanne für geschmolzenes Metall eingebrachte, auswechselbare Ausgußdüse aus feuerfestem Material
JPS574375A (en) * 1980-06-09 1982-01-09 Nisshin Steel Co Ltd Vessel for molten metal
FR2516415A1 (fr) * 1981-11-13 1983-05-20 Daussan & Co Dispositif pour eliminer les inclusions contenues dans les metaux liquides
JPS63157756A (ja) * 1986-12-22 1988-06-30 Tokyo Yogyo Co Ltd ノズルれんがのノズル受けれんがへのセツト方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010044916A1 (de) * 2010-09-09 2012-03-15 Thermat Industrieofen Gmbh Füllrohr flachdichtend in Einheit mit Einfülltrichter für druckgasbetätigte Dosieröfen für NE-Metalle

Also Published As

Publication number Publication date
DE69501932T2 (de) 1998-11-26
FR2724128A1 (fr) 1996-03-08
FR2724128B1 (de) 1997-02-07
DE69501932D1 (de) 1998-05-07
EP0703027A1 (de) 1996-03-27
US5858260A (en) 1999-01-12

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