EP0703027B1 - Récipient de coulée de métal liquide et manchon préfabriqué de fixation de la busette dans un tel récipient - Google Patents
Récipient de coulée de métal liquide et manchon préfabriqué de fixation de la busette dans un tel récipient Download PDFInfo
- 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
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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.
Landscapes
- 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)
Description
- la figure 1 est une vue en coupe partielle du fond d'un récipient de coulée comportant le perfectionnement conforme à l'invention, dans deux modes de réalisation représentés respectivement par les demi-vues droite et gauche ;
- la figure 2 est une vue d'un détail de la figure 1 représentant la busette de coulée sur la face périphérique extérieure de laquelle est fixé le manchon préfabriqué selon l'invention ;
- la figure 3 est une vue agrandie d'un détail de la figure 1 selon un autre mode de réalisation de l'invention.
liant minéral, par exemple silicate de soude : | 0 à 20 % |
matière réfractaire en grains, par exemple argile broyée, chamotte, olivine, magnésie et leurs mélanges : | 0 à 98 % |
fibres minérales : | 0 à 1 % |
fibres organiques : | 0 à 2 % |
liant organique, par exemple dextrine : | 0 à 10 % |
agent de rhéologie, par exemple bentonite : | 0 à 5 % |
Cr2O3 | 0,12 à 0,50 % | par exemple 0,25 % |
SiO2 | 18 à 22 % | 19,22 % |
Al2O3 | 0,10 à 0,40 % | 0,28 % |
CaO | 1 à 3 % | 2,00 % |
MgO | 60 à 75 % | 68,32 % |
Fe2O3 | 1,20 à 4 % | 2,82 % |
Na2O | 0 à 0,10 % | 0,01 % |
H2O | 0,50 à 2,50 % | 1,79 % |
C | 1,7 à 3 % | 2,43 % |
perte au feu à 1 000 °C | 3 à 5,5 % | 4,81 % |
Claims (10)
- Moyen formant joint destiné à être utilisé dans un récipient de coulée de métal liquide comprenant au moins un orifice de coulée (4) constitué par un trou (6) sensiblement tronconique dans lequel est engagée axialement une busette de coulée (7), ce moyen formant joint étant adapté à être introduit dans un espace annulaire ménagé entre le trou (6) et le pourtour (8) de la busette (7) pour la fixation de la busette (7) dans ledit trou (6), et étant réalisé à partir de particules inorganiques liées entre elles par un liant, caractérisé en ce qu'il est constitué par un manchon préfabriqué (11) insérable dans ledit trou (6) et fabriqué à partir de particules inorganiques liées entre elles par un liant qui présente un taux de dégradation prédéterminé aux températures en jeu pendant la coulée dudit métal liquide.
- Manchon selon la revendication 1, caractérisé en ce que la granulométrie et la composition des particules inorganiques sont choisies pour que ces particules, aux températures en jeu pendant la coulée du métal liquide contenu dans le récipient, ne frittent pas complètement ou ne frittent que faiblement de façon à créer avec les surfaces avec lesquelles elles sont en contact une liaison friable.
- Manchon selon la revendication 1 ou 2, caractérisé en ce que les particules inorganiques constituant le manchon sont principalement des particules de magnésie et/ou de silice.
- Manchon selon l'une des revendications 1 à 3, caractérisé en ce que l'épaisseur du manchon préfabriqué est comprise entre 15 et 35 mm environ.
- Manchon selon l'une des revendications 1 à 4, caractérisé en ce que la composition pondérale du mélange composant le manchon préfabriqué est la suivante :
liant minéral 0 à 20% matière réfractaire en grains 0 à 98% fibres minérales 0 à 1% fibres organiques 0 à 2% liant organique 0 à 10% agent de rhéologie 0 à 5% - Manchon selon la revendication 5, caractérisé en ce que la composition pondérale du mélange composant le manchon préfabriqué est la suivante :
Cr2O3 0,12 à 0,50% par exemple 0,25% SiO2 18 à 22% 19,22% Al2O3 0,10 à 0,40 % 0,28% CaO 1 à 3% 2,00% MgO 60 à 75% 68,32% Fe2O3 1,20 à 4% 2,82% Na2O 0 à 0,10% 0,01% H2O 0,50 à 2,50% 1,79% C 1,7 à 3% 2,43% Perte au feu à 100°C 3 à 5,5% 4,81% - Manchon selon l'une des revendications 1 à 6, caractérisé en ce qu'il est thermiquement isolant.
- Manchon selon l'une des revendications 1 à 7, caractérisé en ce qu'il est fixé sur la face périphérique extérieure de la busette (7), avant la mise en place de celle-ci dans le trou (6) d'un récipient.
- Récipient de coulée de métal liquide, comprenant des parois latérales (1) et un fond (2) recouverts par un revêtement permanent réfractaire (3), le fond (2) comprenant au moins un orifice de coulée (4) dans le revêtement permanent (3) dudit fond (2), ledit orifice étant constitué par un trou (6) sensiblement tronconique dans lequel est engagée axialement une busette de coulée (7), un espace annulaire étant ménagé entre le trou (6) du revêtement permanent et le pourtour (8) de la busette (7), pour recevoir un moyen formant joint pour la fixation de la busette (7) dans ledit trou (6), ce moyen formant joint étant réalisé à partir de particules inorganiques liées entre elles par un liant, caractérisé en ce que le moyen formant joint est un manchon préfabriqué (11) insérable dans ledit trou (6) selon l'une quelconque des revendications 1 à 8.
- Récipient selon la revendication 9, caractérisé en ce qu'un anneau isolant préfabriqué (13) est mis en place par dessus le manchon (11), la busette (7) et le revêtement réfractaire permanent (3).
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 (fr) | 1996-03-27 |
EP0703027B1 true EP0703027B1 (fr) | 1998-04-01 |
Family
ID=26231386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95402010A Expired - Lifetime EP0703027B1 (fr) | 1994-09-05 | 1995-09-05 | Récipient de coulée de métal liquide et manchon préfabriqué de fixation de la busette dans un tel récipient |
Country Status (4)
Country | Link |
---|---|
US (1) | US5858260A (fr) |
EP (1) | EP0703027B1 (fr) |
DE (1) | DE69501932T2 (fr) |
FR (1) | FR2724128A1 (fr) |
Cited By (1)
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)
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 |
US8093169B2 (en) * | 2006-11-06 | 2012-01-10 | Krosakiharima Corporation | High-durability sleeve bricks |
CA2747887C (fr) * | 2009-01-21 | 2016-07-26 | Refractory Intellectual Property Gmbh & Co Kg. | Buse d'entree immergee |
EP2444177A1 (fr) * | 2010-10-20 | 2012-04-25 | Vesuvius Group S.A | Tube pour l'écoulement de métal liquide |
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)
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 |
-
1994
- 1994-09-05 FR FR9410619A patent/FR2724128A1/fr active Granted
-
1995
- 1995-09-05 DE DE69501932T patent/DE69501932T2/de not_active Expired - Fee Related
- 1995-09-05 EP EP95402010A patent/EP0703027B1/fr not_active Expired - Lifetime
-
1997
- 1997-03-05 US US08/811,929 patent/US5858260A/en not_active Expired - Fee Related
Cited By (1)
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 |
---|---|
US5858260A (en) | 1999-01-12 |
DE69501932D1 (de) | 1998-05-07 |
EP0703027A1 (fr) | 1996-03-27 |
DE69501932T2 (de) | 1998-11-26 |
FR2724128A1 (fr) | 1996-03-08 |
FR2724128B1 (fr) | 1997-02-07 |
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