Refractory shapes; refractory bricks; refractory blocks; refractory tiles; refractory plates; refractory clay; refractory mortar; refractory cement; refractory concrete; refractory sand; refractory ceramic masses; fired refractory materials, not of metal; refractory aggregates; refractory furnace linings; metallurgical vessels such as ladles and tundishes, and linings therefor; fired refractory materials, not of metal, being ladle shrouds; fired refractory materials, not of metal, being stopper rods; fired refractory materials, not of metal, being nozzles for use in the casting of metals; fired refractory materials, not of metal, being plates for use in the casting of metals; parts, fittings, and accessories for all the aforesaid goods
A Filter module of a filtering system for a tundish is provided that includes a filter unit provided with channels extending from a channel inlet to a channel outlet, and a wall module with a wall defining an opening extending over an opening height from the floor. A bypass passage is defined between the wall module and the filter module of largest width such that a metal melt can only flow from the inlet portion to the outlet portion by flowing either through the channels of the filter unit or through the bypass passage. The wall module includes a wall ledge having a width. The filter module further includes a filter ledge having a width and being offset vertically relative to the wall ledge to form therewith a baffle.
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
B22D 43/00 - Décrassage mécanique, p. ex. raclage du métal liquide
The invention relates to a tundish flow stabilizer, in the technical field of continuous casting, comprising a flow stabilizer body and multiple flow-guiding protrusions, the flow stabilizer body being a hollow structure, the multiple flow-guiding protrusions being located in the flow stabilizer body and fixed to a bottom wall of the flow stabilizer body, a first end of each said flow-guiding protrusion extending to a sidewall of the flow stabilizer body, and a flow path being formed between two adjacent said flow-guiding protrusions. The tundish flow stabilizer enables a flow of steel entering it to dissipate most of its turbulence kinetic energy, so that the flow of steel has less or weak turbulence kinetic energy when it leaves, thus avoiding a situation where the flow of steel splashes or pierces the bottom of the tundish.
A porous refractory cast material contains a closed refractory aggregate fraction having a minimum particle size and a maximum particle size; the ratio of maximum particle size to minimum particle size is 10:1 or less. This closed refractory aggregate fraction comprises all of the porous refractory cast material having a particle diameter greater than 0.1 mm. The porous refractory cast material also contains a binder phase containing refractory selected from calcium aluminate cement, alumina phosphate, hydratable alumina, colloidal silica and combinations thereof. Also disclosed is a metallurgical vessel with an interior lining incorporating the porous refractory cast material.
C04B 38/00 - Mortiers, béton, pierre artificielle ou articles de céramiques poreuxLeur préparation
C04B 35/103 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée contenant des matériaux réfractaires non oxydes, p. ex. du carbone
C04B 35/106 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée contenant de l'oxyde de zirconium ou du zircon (ZrSiO4)
C04B 35/44 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'aluminates
C04B 35/447 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de phosphates
5.
Method and apparatus for batch production of, and continuous application of, a refractory composition to a surface
A device and a process for the continuous application of a refractory slurry to a surface incorporate a batch reactor (10) for the controlled mixing of the slurry, a product vessel (60) in communication with the batch reactor (10) to contain the mixed slurry, and a variable-rate spraying applicator or nozzle in communication with the product vessel and with an air supply. A controller (100) controls input to, output from, and the operation of, the batch mixer (10), and monitors batch production. The controller (100) monitors the amount of slurry contained in the product vessel (60). If the level of slurry in the product hopper is such that the product hopper cannot accommodate an additional batch of slurry, the controller interrupts batch production and resumes production when the product hopper can accept the contents of the batch reactor (10).
B05B 7/14 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p. ex. un liquide et de l'air, une poudre et un gaz agencés pour projeter des matériaux en particules
B28C 5/02 - Appareillages ou procédés pour la production de mélanges de ciment avec d'autres substances, p. ex. coulis, mortiers, compositions poreuses ou fibreuses n'utilisant pas de moyens mécaniques d'entraînement pour effectuer le mélange
Filter module (1) of a filtering system for a tundish (10) comprises a filter unit (1f) provided with channels (1c) extending from a channel inlet to a channel outlet, and a wall module (2) comprising a wall defining an opening (2o) extending over an opening height (h2) from the floor (10f). A bypass passage (2b) is defined between the wall module (2) and the filter module (1) of largest width (t12) such that the metal melt can only flow from the inlet portion to the outlet portion by flowing either through the channels of the filter unit (1f) or through the bypass passage (2b). The wall module comprises a wall ledge (2L) having a width (t2L). The filter module (1) further comprises a filter ledge (1L) having a width (t1L) and being offset vertically relative to the wall ledge (2L) to form therewith a baffle.
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
7.
METHOD AND APPARATUS FOR BATCH PRODUCTION OF, AND CONTINUOUS APPLICATION OF, A REFRACTORY COMPOSITION TO A SURFACE
A device and a process for the continuous application of a refractory slurry to a surface incorporate a batch reactor (10) for the controlled mixing of the slurry, a product vessel (60) in communication with the batch reactor (10) to contain the mixed slurry, and a variable-rate spraying applicator or nozzle in communication with the product vessel and with an air supply. A controller (100) controls input to, output from, and the operation of, the batch mixer (10), and monitors batch production. The controller (100) monitors the amount of slurry contained in the product vessel (60). If the level of slurry in the product hopper is such that the product hopper cannot accommodate an additional batch of slurry, the controller interrupts batch production and resumes production when the product hopper can accept the contents of the batch reactor (10).
B28C 7/04 - Alimentation ou dosage des ingrédients
B28C 5/02 - Appareillages ou procédés pour la production de mélanges de ciment avec d'autres substances, p. ex. coulis, mortiers, compositions poreuses ou fibreuses n'utilisant pas de moyens mécaniques d'entraînement pour effectuer le mélange
A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques. When contacted by molten metal, the molten metal penetrates into the refractory material, wetting the coarse-grain refractory particles, and forming a refractory-metal composite barrier layer that decreases or blocks oxygen transport through the refractory lining.
A casting nozzle (10) for use in the casting of molten metal produces a stable flow pattern having an elongated section in the horizontal plane. The bore (12) cross-sectional area contains, from entry (24) to exit (26, 28), at least two significant section area reductions to reduce turbulence, realign streamlines and affect flow distribution inside the nozzle. The bore cross-section has a local minimum value in a contraction section (40) located between the entry section (30) and an expansion section (50). Bore cross-sectional area decreases from the expansion section to the lower end of the nozzle. The two significant cross-sectional area reductions cooperate with other structures within the bore to stabilize flow.
B22D 11/06 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules dont les parois se déplacent, p. ex. entre des rouleaux, des plaques, des courroies, des chenilles
A tundish with improved flow characteristics for molten metal has an outlet in its base. The outlet is spaced longitudinally in the tundish from a pour zone. The pour zone is positioned to receive a stream of molten steel from a ladle. The outlet is provided with a refractory barrier at its upper end. A portion of the floor of the tundish circumferential to the outlet is provided with a refractory structure having an interior free volume. Structures within the tundish, such as a dam extending upwardly from the tundish floor between the pour zone and the outlet, or a well in the tundish floor surrounding the outlet, may be used to affect the flow of molten metal in the tundish.
A slab nozzle for use in a continuous slab casting installation is characterized by a specific geometry of the outer wall of a downstream portion thereof which is inserted in a slab mould cavity. The specific geometry promotes a “round-about” effect whereby converging opposite streams of molten metal flowing towards two opposite flanks of the slab nozzle are each preferentially deviated towards one side of the slab nozzle where they can freely flow through the narrow channels formed between the slab nozzle and the slab mould cavity wall without impinging with one another. This prolongs the service life of the slab nozzle by substantially reducing the erosion rate of the outer wall thereof.
A refractory lining structure for a metallurgical vessel is characterized by at least one elongated expansion joint formed in and extending through the surface of the working lining in a substantially vertical direction. The elongated expansion joint accommodates thermal expansion of the working lining in a metallurgical vessel such as, for example, a tundish during preheating for a continuous casting operation. The elongated expansion joint decreases crack formation, delamination, and spalling of the working lining from underlying back-up linings and/or safety linings in metallurgical vessels during preheating and use, while still facilitating metal skull removal after the completion of metallurgical operations.
B22D 41/00 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues
B22D 11/10 - Alimentation en métal liquide ou traitement du métal liquide
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
C04B 35/66 - Réfractaires monolithiques ou mortiers réfractaires, y compris ceux contenant de l'argile
13.
Porous refractory cast material, its use and production
A porous refractory cast material contains a closed refractory aggregate fraction having a minimum particle size and a maximum particle size; the ratio of maximum particle size to minimum particle size is 10:1 or less. This closed refractory aggregate fraction comprises all of the porous refractory cast material having a particle diameter greater than 0.1 mm. The porous refractory cast material also contains a binder phase containing refractory selected from calcium aluminate cement, alumina phosphate, hydratable alumina, colloidal silica and combinations thereof. Also disclosed is a metallurgical vessel with an interior lining incorporating the porous refractory cast material.
C04B 38/00 - Mortiers, béton, pierre artificielle ou articles de céramiques poreuxLeur préparation
C04B 35/103 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée contenant des matériaux réfractaires non oxydes, p. ex. du carbone
C04B 35/106 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée contenant de l'oxyde de zirconium ou du zircon (ZrSiO4)
C04B 35/44 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'aluminates
C04B 35/447 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de phosphates
A tap hole closure (1) for use in a tap hole bore of a converter, comprising an elongated 5 refractory body (2) extending along a central longitudinal axis X, said refractory body (2) comprising: - an upstream portion (16) having a maximum width W3m - a downstream portion (14) having a width W1 - and an intermediate portion (15) directly connected to the upstream portion (16) and adjacent to the downstream portion (14), said intermediate portion being adapted to engage entirely in the tap hole, and wherein - said intermediate portion extending over a height H2 of at least 50 mm along the central longitudinal axis, - said intermediate portion having a width W2 at any location such as W1
An impact pad for metallurgical processes is formed from refractory material, and contains a base having an impact surface facing upwardly against a stream of molten metal entering a vessel containing the impact pad. A wall having a plurality of adjacent wall portions extends upwardly from the base. The impact surface contains at least one nonhorizontal facet extending inwardly from a wall portion; all lines in the facet extending perpendicularly to the wall portion have an inclination or declination with respect to the horizontal plane.
A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques. When contacted by molten metal, the molten metal penetrates into the refractory material, wetting the coarse-grain refractory particles, and forming a refractory-metal composite barrier layer that decreases or blocks oxygen transport through the refractory lining.
A refractory composition for forming a working lining in a metallurgical vessel contains a coarse-grain refractory particle fraction and a fine-grain refractory particle fraction, or at least 0.25% additive calcium oxide, or at least 0.25% titanium dioxide. The coarse-grain refractory particles can include alumina particles, magnesia particles, magnesium aluminate spinel particles, zirconia particles, or doloma particles, or a combination of any of these particles. The fine-grain refractory particles can be comprised of any low-magnesia refractory oxide. The refractory composition can be applied to a metallurgical vessel by spraying, gunning, shotcreting, vibrating, casting, troweling, or positioning preformed refractory shapes, or a combination of any of these techniques. When contacted by molten metal, the molten metal penetrates into the refractory material, wetting the coarse-grain refractory particles, and forming a refractory-metal composite barrier layer that decreases or blocks oxygen transport through the refractory lining.
A tundish (10) with improved flow characteristics for molten metal has an outlet (16) in its base. The outlet is spaced longitudinally in the tundish from a pour zone. The pour zone is positioned to receive a stream of molten steel from a ladle. The outlet is provided with a refractory barrier (32) at its upper end. A portion of the floor (12) of the tundish circumferential to the outlet is provided with a refractory structure (28) having an interior free volume. Structures within the tundish, such as a dam (20) extending upwardly from the tundish floor between the pour zone and the outlet, or a well (26) in the tundish floor surrounding the outlet, may be used to affect the flow of molten metal in the tundish.
A tundish (10) with improved flow characteristics for molten metal has an outlet (16) in its base. The outlet is spaced longitudinally in the tundish from a pour zone. The pour zone is positioned to receive a stream of molten steel from a ladle. The outlet is provided with a refractory barrier (32) at its upper end. A portion of the floor (12) of the tundish circumferential to the outlet is provided with a refractory structure (28) having an interior free volume. Structures within the tundish, such as a dam (20) extending upwardly from the tundish floor between the pour zone and the outlet, or a well (26) in the tundish floor surrounding the outlet, may be used to affect the flow of molten metal in the tundish.
An immersion sensor is configured to determine the content of a chemical element in molten metal. The immersion sensor has an auxiliary electrochemical cell extending from an interior surface into the internal volume of a sampling chamber. The sampling chamber can be integrally-formed in a sensor head or in a separate refractory structure. The immersion sensor may be configured for the flow of molten metal into the internal volume of the sampling chamber and into contact with the auxiliary electrochemical cell.
A replacement product for a portion of a castable refractory surface contains a precast refractory piece with accommodation for an adjustable positioning structure for conforming the working surface of the precast refractory piece to the castable refractory surface. A process for installing the precast refractory piece includes positioning the precast refractory piece with respect to the castable refractory surface, and introducing castable material into an interface volume between the precast refractory piece and the castable refractory surface.
A refractory lining structure (18) for a metallurgical vessel is characterized by at least one elongated expansion joint (50) formed in and extending through the surface of the working lining in a substantially vertical direction. The elongated expansion joint accommodates thermal expansion of the working lining (20) in a metallurgical vessel such as, for example, a tundish during preheating for a continuous casting operation. The elongated expansion joint decreases crack formation, delamination, and spalling of the working lining from underlying back-up linings and/or safety linings in metallurgical vessels during preheating and use, while still facilitating metal skull removal after the completion of metallurgical operations.
A refractory lining structure (18) for a metallurgical vessel is characterized by at least one elongated expansion joint (50) formed in and extending through the surface of the working lining in a substantially vertical direction. The elongated expansion joint accommodates thermal expansion of the working lining (20) in a metallurgical vessel such as, for example, a tundish during preheating for a continuous casting operation. The elongated expansion joint decreases crack formation, delamination, and spalling of the working lining from underlying back-up linings and/or safety linings in metallurgical vessels during preheating and use, while still facilitating metal skull removal after the completion of metallurgical operations.
The present invention concerns a slab nozzle (1) for use in a continuous slab casting installation, characterized by a specific geometry of the outer wall of a downstream portion thereof which is inserted in a slab mould cavity. The specific geometry promotes a "round-about" effect whereby converging opposite streams of molten metal flowing towards two opposite flanks of the slab nozzle are each preferentially deviated towards one side of the slab nozzle where they can freely flow through the narrow channels formed between the slab nozzle and the slab mould cavity wall without impinging with one another. This prolongs the service life of the slab nozzle by substantially reducing the erosion rate of the outer wall thereof.
A casting nozzle comprises an elongated body defined by an outer wall and comprising a bore defined by a bore wall and extending along a longitudinal axis, X1, from a bore inlet to a downstream bore end, said bore comprising two opposite side ports, each extending transversally to said longitudinal axis, X1, from an opening at the bore wall defining a port inlet adjacent to the downstream bore end, to an opening at the outer wall defining a port outlet which fluidly connects the bore with an outer atmosphere. Upstream from, and directly above each port inlet, one or two flow deflectors protrude out of the bore wall and extend from an upstream deflector end remote from the port inlet to a downstream deflector end close to the port inlet.
A porous refractory cast material contains a closed refractory aggregate fraction having a minimum particle size and a maximum particle size; the ratio of maximum particle size to minimum particle size is 10:1 or less. This closed refractory aggregate fraction comprises all of the porous refractory cast material having a particle diameter greater than 0.1 mm. The porous refractory cast material also contains a binder phase containing refractory selected from calcium aluminate cement, alumina phosphate, hydratable alumina, colloidal silica and combinations thereof. Also disclosed is a metallurgical vessel with an interior lining incorporating the porous refractory cast material.
C04B 38/00 - Mortiers, béton, pierre artificielle ou articles de céramiques poreuxLeur préparation
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01J 19/02 - Appareils caractérisés par le fait qu'ils sont construits avec des matériaux choisis pour leurs propriétés de résistance aux agents chimiques
B32B 5/18 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par le fait qu'une des couches contient un matériau sous forme de mousse ou essentiellement poreux
B32B 18/00 - Produits stratifiés composés essentiellement de céramiques, p. ex. de produits réfractaires
A porous refractory cast material contains a closed refractory aggregate fraction having a minimum particle size and a maximum particle size; the ratio of maximum particle size to minimum particle size is 10:1 or less. This closed refractory aggregate fraction comprises all of the porous refractory cast material having a particle diameter greater than 0.1 mm. The porous refractory cast material also contains a binder phase containing refractory selected from calcium aluminate cement, alumina phosphate, hydratable alumina, colloidal silica and combinations thereof. Also disclosed is a metallurgical vessel with an interior lining incorporating the porous refractory cast material.
B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p. ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
B01D 39/00 - Substance filtrante pour fluides liquides ou gazeux
C22B 9/02 - Affinage par liquation, filtration, centrifugation, distillation ou action d'ultrasons
A refractory block configured to surround an outlet modifies, within a refractory vessel, the flow of molten metal passing through the outlet. The block takes the form of a base through which a main orifice passes, and a wall extending upwards around the periphery of the base. Structural features that may be included in the block include a circumferential lip around the exterior of the wall, an interior volume in which the radius decreases downwardly towards the main orifice in a plurality of steps, and flow openings in the wall that are configured to induce swirling in the flow pattern in the interior volume of the block.
B22D 11/118 - Affinage du métal en faisant circuler le métal sous, sur, ou autour, de barrages
B22D 41/16 - Fermetures du type quenouilles de coulée, c.-à-d. la tige de fermeture étant mise en place vers le bas à travers le récipient et le métal qu'il contient, pour faire varier la section de passage du métal dans l'ouverture de coulée
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
B22D 43/00 - Décrassage mécanique, p. ex. raclage du métal liquide
A refractory formulation containing an anhydrous solvent, an oleophilic rheology modifier and a refractory aggregate exhibits non-thermoplastic behavior, and remains plastic and formable at temperatures in the range of 10 degrees Celsius to 180 degrees Celsius. The oleophilic rheology modifier may effectively bind with the solvent to create a gel-like structure with organic solvents with moderate to high polarity. A phyllosilicate clay that has been treated with a quaternary fatty acid amine may be used as the oleophilic rheology modifier.
C04B 35/10 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde d'aluminium
C04B 33/13 - Ingrédients entrant dans les compositions
C04B 35/14 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base de silice
C04B 35/565 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base de non oxydes à base de carbures à base de carbure de silicium
C04B 35/63 - Préparation ou traitement des poudres individuellement ou par fournées utilisant des additifs spécialement adaptés à la formation des produits
A lining for a metallurgical vessel is configured to have an engineered porosity. The lining contains a plurality of regions, each extending in a primary plane of the lining, each region having a differing value of total pore or perforation area as measured in a primary plane of the lining. The lining may be used to form part or all of the working surface of the floors or walls of the vessel. In casting use the lining produces an oxidation buffering layer at an interphase of metal melt extending from the interface between metal melt and the walls and floor of the metallurgical vessel, such that when in casting use, the metal flow rate in said oxidation buffering layer is substantially nil, and the concentration of endogenous inclusions, in particular oxides, in said oxidation buffering layer is substantially higher than in the bulk of the metal melt.
C04B 35/10 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde d'aluminium
C04B 35/04 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde de magnésium, d'oxyde de calcium ou de mélanges d'oxydes dérivés de la dolomite à base d'oxyde de magnésium
C04B 35/622 - Procédés de mise en formeTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
32.
METALLURGICAL VESSEL LINING WITH ENCLOSED METAL LAYER
A lining structure 30 for a refractory vessel contains a first layer 34; a second layer 42, in communication with the first layer, containing a metal layer or component; and a third layer 50, in communication with the second layer 42. The metal component 64 in the second layer may contain filled transverse passages, between the surface of the second layer in contact with the first layer 44 and the surface of the second layer in contact with the third layer 46, producing support structures 68 to maintain the structural integrity of the refractory vessel in use.
C23C 28/04 - Revêtements uniquement de matériaux inorganiques non métalliques
B22C 1/00 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules
B22C 1/04 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules caractérisées par des additions pour applications particulières, p. ex. indicateurs, addition pour faciliter la destruction du moule pour protéger les pièces, p. ex. contre la décarburation
B22C 3/00 - Emploi de compositions spécifiées pour revêtir les surfaces des moules, noyaux ou modèles
F27B 14/08 - Parties constitutives spécialement adaptées aux fours à creusets ou à bassin
An article 10 includes a carbon-containing composition that is protected from oxidation by covering the surface of the composition with an oxidation-resistant fiber 24. Optionally, a glaze 26 can be used for additional oxidation resistance. The fiber 24 reduces oxidation of carbon-containing articles and is particularly useful for carbon-containing compositions with an outer surface comprising carbon, such as carbon-fiber reinforced ceramic composites. The fiber 24 can be applied to the composition as a filament or fabric. Conveniently, the fiber 24 can be applied to the carbon-containing composition as a continuously wound fiber.
A lining structure 30 for a refractory vessel contains a first layer 34; a second layer 42, in communication with the first layer, containing a metal layer or component; and a third layer 50, in communication with the second layer 42. The metal component 64 in the second layer may contain filled transverse passages, between the surface of the second layer in contact with the first layer 44 and the surface of the second layer in contact with the third layer 46, producing support structures 68 to maintain the structural integrity of the refractory vessel in use.
B22C 1/00 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules
B22C 1/04 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules caractérisées par des additions pour applications particulières, p. ex. indicateurs, addition pour faciliter la destruction du moule pour protéger les pièces, p. ex. contre la décarburation
B22C 3/00 - Emploi de compositions spécifiées pour revêtir les surfaces des moules, noyaux ou modèles
An impact pad (30) for metallurgical processes is formed from refractory material, and contains a base (31) having an impact surface (32) facing upwardly against a stream of molten metal entering a vessel containing the impact pad. A wall (34) having a plurality of adjacent wall portions (36, 38) extends upwardly from the base (31). The impact surface (32) contains at least one nonhorizontal facet extending inwardly from a wall portion (36, 38); all lines in the facet extending perpendicularly to the wall portion have an inclination or declination with respect to the horizontal plane.
B22D 11/10 - Alimentation en métal liquide ou traitement du métal liquide
B22D 11/103 - Répartition du métal liquide, p. ex. en utilisant des goulottes, des flotteurs, des distributeurs
B22D 41/00 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
An impact pad (30) for metallurgical processes is formed from refractory material, and contains a base (31) having an impact surface (32) facing upwardly against a stream of molten metal entering a vessel containing the impact pad. A wall (34) having a plurality of adjacent wall portions (36, 38) extends upwardly from the base (31). The impact surface (32) contains at least one nonhorizontal facet extending inwardly from a wall portion (36, 38); all lines in the facet extending perpendicularly to the wall portion have an inclination or declination with respect to the horizontal plane.
B22D 11/10 - Alimentation en métal liquide ou traitement du métal liquide
B22D 11/103 - Répartition du métal liquide, p. ex. en utilisant des goulottes, des flotteurs, des distributeurs
B22D 41/00 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
A thermal insulation panel is constructed from a hot face layer, an intermediate layer and an ambient face layer. Features providing insulating capability include the incorporation of an IR opacifier into the hot face layer, the provision of a low conduction volume such as an air gap between the hot face layer and the intermediate layer, and between the intermediate layer and the ambient face layer, and the use of infrared reflective foil on the back surface of the hot face layer and/or on the front surface of the intermediate layer. Base materials that may be used in the hot face layer include silica, alumina, and alumina-silica based ceramic materials. IR opacifiers in the hot face layer may contain ZrO2, SiC, rutile, TiO2, MnO, iron oxides, CrO2, ZrSiO2, Al2O3 and mixtures thereof.
F16L 59/02 - Forme ou configuration de matériaux isolants, avec ou sans revêtement formant un tout avec les matériaux isolants
B32B 9/04 - Produits stratifiés composés essentiellement d'une substance particulière non couverte par les groupes comprenant une telle substance comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique
B32B 18/00 - Produits stratifiés composés essentiellement de céramiques, p. ex. de produits réfractaires
A refractory formulation containing an anhydrous solvent, an oleophilic rheology modifier and a refractory aggregate exhibits non-thermoplastic behavior, and remains plastic and formable at temperatures in the range of 10 degrees Celsius to 180 degrees Celsius. The oleophilic rheology modifier may effectively bind with the solvent to create a gel-like structure with organic solvents with moderate to high polarity. A phyllosilicate clay that has been treated with a quaternary fatty acid amine may be used as the oleophilic rheology modifier.
A casting nozzle comprises an elongated body defined by an outer wall and comprising a bore defined by a bore wall and extending along a longitudinal axis from a bore inlet to a downstream bore end, said bore comprising two opposite side ports, each extending transversally to said longitudinal axis from an opening at the bore wall defining a port inlet adjacent to the downstream bore end, to an opening at the outer wall defining a port outlet which fluidly connects the bore with an outer atmosphere. Upstream from, and directly above each port inlet, one or two flow deflectors protrude out of the bore wall and extend from an upstream deflector end remote from the port inlet to a downstream deflector end close to the port inlet.
The present invention concerns a casting nozzle comprising an elongated body defined by an outer wall and comprising a bore (1) defined by a bore wall and extending along a longitudinal axis, X1, from a bore inlet (1u) to a downstream bore end (1d), said bore comprising two opposite side ports (2), each extending transversally to said longitudinal axis, X1, from an opening at the bore wall defining a port inlet (2u) adjacent to the downstream bore end (1d), to an opening at the outer wall defining a port outlet (2d) which fluidly connects the bore with an outer atmosphere, Characterized in that, upstream from, and directly above each port inlet (2u), one or two flow deflectors (3) protrude out of the bore wall and extend from an upstream deflector end remote from the port inlet to a downstream deflector end close to the port inlet, over a deflector height, Hd, measured parallel to the longitudinal axis, X1, and wherein an area of a cross-section normal to the longitudinal axis, X1, of each flow deflector increases continuously over at least 50% of the deflector height, Hd, in the direction extending from the upstream deflector end towards the downstream deflector end.
A thin slab nozzle contains a central bore extending downstream along longitudinal axis X1 from an inlet orifice at an upstream end. The central bore comprises an upstream bore portion with a height Ha, in communication with a converging bore portion of height He, in communication with a thin bore portion of height Hf ending at the upstream end of a divider, and first and second front ports separated from one another by the divider and coupled to the central bore portion at least partially at the converging bore portion. X2 is a transverse axis, normal to X1, along which the nozzle becomes thinner in a downstream portion. In a section of the thin slab nozzle along a symmetry plane Π1 defined by X1 and by X2, the bore wall of the converging bore portion is curved at all points, and Hf/He≤1.
A replacement product for a portion of a castable refractory surface contains a precast refractory piece with accommodation for an adjustable positioning structure for conforming the working surface of the precast refractory piece to the castable refractory surface. A process for installing the precast refractory piece includes positioning the precast refractory piece with respect to the castable refractory surface, and introducing castable material into an interface volume between the precast refractory piece and the castable refractory surface.
A replacement product for a portion of a castable refractory surface contains a precast refractory piece with accommodation for an adjustable positioning structure for conforming the working surface of the precast refractory piece to the castable refractory surface. A process for installing the precast refractory piece includes positioning the precast refractory piece with respect to the castable refractory surface, and introducing castable material into an interface volume between the precast refractory piece and the castable refractory surface.
A formulation containing polymer, resin and cement combined with aggregate can be used as a gunnable mix that is applied to a surface by being conveyed pneumatically in dry form to a nozzle, where water is added. Polymer in the gunnable mix enables it to adhere and bond to a surface, such as carbon brick, of a lining of a vessel used for the containment of molten metals. The formulation may be used, for example, to repair and protect blast furnace hearth linings.
A nozzle for casting steel contains an inlet portion, an elongated portion extending along a first longitudinal axis, an outlet portion and a pouring bore having a front port inlet. A planar cut of the nozzle outlet portion normal to the first longitudinal axis passing through the front port inlet contains the outline of the bore, the outline of the outer peripheral wall of the outlet portion of the nozzle, and a first transverse axis. In the planar cut, the bore centroid and wall centroid are distinct and separated by a distance, d≠0; and the segment extending along the first transverse axis, from the bore centroid, to the wall perimeter is longer than the segment extending from the wall centroid to the intersecting point between the first transverse axis and the wall perimeter.
B22D 11/00 - Coulée continue des métaux, c.-à-d. en longueur indéfinie
B22D 35/04 - Équipement de transport du métal liquide jusqu'aux sillons de lingotage ou aux moules aux moules, p. ex. plaques de base, chenaux de coulée
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
A pour tube for casting molten metal is adapted to reduce turbulence and mold disturbances, thereby producing a more stable, uniform outflow. The pour tube has a central longitudinal axis and includes a bore in communication with a port distributor having a greater radius with respect to the longitudinal axis than does the bore. Exit ports provide fluid communication between the port distributor and the exterior of the device. Each of a pair of larger exit ports has a larger cross-sectional area than does either of a pair of smaller exit ports.
A nozzle assembly, for a metal casting apparatus selected from a sliding gate and a tube exchange device, comprises a first refractory element comprising a first coupling surface which includes a first bore aperture, and a second refractory element comprising a second coupling surface, which includes a second bore aperture, the first and second elements being coupled to one another in a sliding translation relationship through their respective first and second coupling surfaces such that the first and second bore apertures can be brought into and out of registry to define, when in registry, a continuous bore for discharging molten metal from a molten metal inlet to a molten metal outlet of said nozzle assembly. A sealing member is provided between the first and second coupling surfaces of the first and second elements. The sealing member comprises a thermally intumescent material.
C03C 8/24 - Compositions de scellement par fusion, constituées de frittes vitreuses contenant des additifs, utilisées pour le scellement de matériaux différents, p. ex. verre et métalVerre de scellement
B22D 41/36 - Traitement des plaques, p. ex. lubrification, chauffage
B22D 41/54 - Leur fabrication ou leur remise en état caractérisées par le matériau utilisé à cet effet
B22D 41/22 - Fermetures du type à tiroir, c.-à-d. comportant une plaque fixe et une plaque mobile en contact mutuel et dont le glissement permet de faire varier la section de passage
B22D 41/32 - Leur fabrication ou leur remise en état caractérisées par le matériau utilisé
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
F16J 15/06 - Joints d'étanchéité entre surfaces immobiles entre elles avec garniture solide comprimée entre les surfaces à joindre
A metallurgical ladle, and more particularly the bottom of the ladle or a ladle block in the bottom of the ladle, have an outlet through which the molten metal can drain. The ladle bottom contains an open-end channel bounded by at least one wall with a major dimension perpendicular to a line joining the center of the outlet entrance to the center of the wall. In selected configurations, opposing faces of the walls bounding the open-end channel are convex in the horizontal plane and concave in the horizontal plane, respectively.
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
B22D 43/00 - Décrassage mécanique, p. ex. raclage du métal liquide
A tundish impact pad formed from refractory material comprises a base having an impact surface which, in use, faces upwardly against a stream of molten metal entering a tundish, and a wall extending upwardly from the base around at least a part of the periphery of the impact surface. The wall has at least one latitudinal portion. An inwardly-extending feature protrudes from the latitudinal wall. The inwardly-extending feature inhibits flow exiting the impact pad from passing over the center of the latitudinal portion of the wall.
A low-water-content castable composition produces cast products with an increased modulus of rupture, an increased cold crushing strength, and decreased porosity. The composition employs closed fractions of constituent particles with specified populations and specified gaps in the particle size distribution to produce these properties. The composition is suitable for refractory applications.
C04B 14/00 - Emploi de matières inorganiques comme charges, p. ex. de pigments, pour mortiers, béton ou pierre artificielleTraitement de matières inorganiques spécialement prévu pour renforcer leurs propriétés de charge, dans les mortiers, béton ou pierre artificielle
C04B 7/34 - Ciments de chaux hydrauliqueCiments romains
C04B 28/00 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates
C04B 32/00 - Pierres artificielles non prévues par l'un des groupes de la présente sous-classe
A pour tube for casting molten metal is adapted to reduce turbulence and mold disturbances, thereby producing a more stable, uniform outflow. The pour tube includes a bore having a body in communication with an enlarged outlet portion. Exit ports in communication with the outlet portion have an offset design in which at least one wall of the exit port is tangent to a circle having a larger radius than the body of the bore.
A low-water-content castable composition produces cast products with an increased modulus of rupture, an increased cold crushing strength, and decreased porosity. The composition employs closed fractions of constituent particles with specified populations and specified gaps in the particle size distribution to produce these properties. The composition is suitable for refractory applications.
C04B 14/00 - Emploi de matières inorganiques comme charges, p. ex. de pigments, pour mortiers, béton ou pierre artificielleTraitement de matières inorganiques spécialement prévu pour renforcer leurs propriétés de charge, dans les mortiers, béton ou pierre artificielle
C04B 7/34 - Ciments de chaux hydrauliqueCiments romains
C04B 28/00 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates
C04B 32/00 - Pierres artificielles non prévues par l'un des groupes de la présente sous-classe
Conveyor rolls used in high temperature applications, and an end cap assembly for such rolls. The conveyor roll comprises a ceramic spool, an end cap and a tolerance ring. The end cap contains a metal ferrule and has an internal circumference adapted to fit over an end of the ceramic spool. A tolerance ring is interposed between each end of the ceramic spool and the end cap. The tolerance ring is composed of resilient metal having a plurality of circumferentially arranged corrugations. The conveyor roll can resist temporary overheating or blockage without damage.
The present invention concerns stopper rod system for use in a metallurgical vessel, comprising a stopper rod and a nozzle. At least one of the stopper rod nose and the internal surface of the nozzle bore comprise a plurality of ripples that are arranged such that the size of a flow channel between the stopper rod nose and the internal stopper rod when the stopper rod system is in an open position discontinuously increases in size as a function of the distance downstream from the point of contact between the stopper rod and the nozzle.
The present invention concerns a submerged entry nozzle for use in the continuous casting of liquid metal. The nozzle comprises a central bore and a plurality of pairs of discharge outlets. The cross-sectional area of the central bore decreases between pairs of discharge outlets, such that ratio of height to width of any outlet is one or less.
The present invention relates to a ladle block for use in a bottom of a molten metal ladle. The ladle block reduces the amount of contaminants, particularly slag, exiting the ladle during casting operations. The ladle block includes a floor defining an outlet and sidewalls substantially orthogonal to the floor. The floor and sidewalls define a channel having dimensions of length, width and height. Channel dimensions are determined from the Froude number, which is based at least partially on the casting flow rate.
C21B 3/04 - Récupération des sous-produits, p. ex. des scories
C21B 7/14 - Dispositifs de déchargement, p. ex. pour le laitier
C21C 7/00 - Traitement à l'état liquide des alliages ferreux, p. ex. des aciers, non couverts par les groupes
B22D 41/08 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues pour coulée par le fond
09 - Appareils et instruments scientifiques et électriques
19 - Matériaux de construction non métalliques
Produits et services
temperature sensors and electric cable, wire, plugs, computer interface boards, and stands therefore, for use in the molten metal industry and sold as a unit therewith; electrical controllers and electronic motion sensitive sensors for use in the molten metal industry refractory protector tubes for sensors, namely refractory tubes used to protect sensors that are submerged in molten metal for use in the molten metal industry
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
19 - Matériaux de construction non métalliques
Produits et services
CERAMIC PASTES FOR USE IN THE MANUFACTURE OF CERAMIC INSULATION PRODUCTS AND REFRACTORY CERAMICS [ BUILDING INSULATION; CERAMIC INSULATING SLEEVES AND COVERS FOR MACHINERY; CERAMIC FIBER INSULATION CERAMIC PIPE FOR INDUSTRIAL MOGEMETAL FURNACES; CERAMIC INSULATION JACKETS FOR INDUSTRIAL PIPE; INSULATION FOR ELECTRICAL AND WATER PIPES ] [ CERAMIC SHAPES FOR USE IN REFRACTORY FURNACES; CERAMIC CASTINGS; REFRACTORY BLOCKS, BRICKS, CASTABLE MIXES, MORTARS AND SHAPES; CERAMIC BUILDING MATERIALS, namely, BLOCKS, BRICKS, MOLDINGS, PANELS, POLES, POSTS AND SLABS; CERAMIC PIPES; REFRACTORY FURNACE LININGS; CERAMIC CHIMNEYS AND CHIMMNEY FLUES ]
refractory mortars or compositions for continuous casters consisting essentially of alumina, graphite, quartz; submerged nozzles, mixes and plugs or stoppers made from refractory compositions; ceramic tundish nozzles used in casting operations
ceramic articles all made from fused silica refractories; namely, shaped pieces for high temperature furnace structural components, transfer rolls and like shapes used in the thermal treatment of materials
DRY GRANULAR REFRACTORY COMPOSITION COATED WITH BOND CLAY AT ATMOSPHERIC TEMPERATURES LIKE CONCRETE,USED FOR REPAIR AND FOR NEW CONSTRUCTION OF FURNACE LININGS AND THE LIKE
