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.
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 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof
C04B 35/103 - Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
C04B 35/106 - Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
C04B 35/44 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on aluminates
C04B 35/447 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on 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 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B28C 5/02 - Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
B28C 7/02 - Controlling the operation of the mixing
B28C 7/04 - Supplying or proportioning the ingredients
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.
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 7/02 - Controlling the operation of the mixing
B28C 7/04 - Supplying or proportioning the ingredients
B28C 5/02 - Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
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 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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.
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 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof
C04B 35/103 - Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
C04B 35/106 - Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
C04B 35/44 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on aluminates
C04B 35/447 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on 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.
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 - Refining the metal by circulating the metal under, over or around weirs
B22D 41/16 - Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
B22D 41/08 - Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
B22D 43/00 - Mechanical cleaning, e.g. skimming of molten metals
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 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on aluminium oxide
C04B 35/14 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silica
C04B 35/565 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbides based on silicon carbide
C04B 35/63 - Preparing or treating the powders individually or as batches using additives specially adapted for forming the products
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 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on aluminium oxide
C04B 35/04 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
B22D 41/08 - Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
31.
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 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
B22C 1/00 - Compositions of refractory mould or core materialsGrain structures thereofChemical or physical features in the formation or manufacture of moulds
B22C 1/04 - Compositions of refractory mould or core materialsGrain structures thereofChemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for protection of the casting, e.g. against decarbonisation
B22C 3/00 - Selection of compositions for coating the surfaces of moulds, cores, or patterns
F27B 14/08 - Details specially adapted for crucible, pot or tank furnaces
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 of refractory mould or core materialsGrain structures thereofChemical or physical features in the formation or manufacture of moulds
B22C 1/04 - Compositions of refractory mould or core materialsGrain structures thereofChemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for protection of the casting, e.g. against decarbonisation
B22C 3/00 - Selection of compositions for coating the surfaces of moulds, cores, or patterns
C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
F27B 14/08 - Details specially adapted for crucible, pot or tank furnaces
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.
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.
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 - Shape or form of insulating materials, with or without coverings integral with the insulating materials
B32B 9/04 - Layered products essentially comprising a particular substance not covered by groups comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance
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.
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 - Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metalGlass solders
B22D 41/36 - Treating the plates, e.g. lubricating, heating
B22D 41/54 - Manufacturing or repairing thereof characterised by the materials used therefor
B22D 41/22 - Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
B22D 41/32 - Manufacturing or repairing thereof characterised by the materials used therefor
B22D 41/08 - Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
F16J 15/06 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
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.
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 - Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stoneTreatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
C04B 28/00 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
C04B 32/00 - Artificial stone not provided for in other groups of this subclass
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 - Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stoneTreatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
C04B 28/00 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
C04B 32/00 - Artificial stone not provided for in other groups of this subclass
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.
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 (42,56) and the internal surface of the nozzle bore comprise (43,62) 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.
09 - Scientific and electric apparatus and instruments
19 - Non-metallic building materials
Goods & 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 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
19 - Non-metallic building materials
Goods & 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
