VESUVIUS CRUCIBLE COMPANY Patent applications |
Patent application number | Title | Published |
20160121391 | LEAD RETAINING PURGE PLUG - A purge plug containing a refractory material is configured to be inserted in the bottom of a ladle for introducing purging gas through a heat of molten metal in the ladle. The purge plug houses a retention chamber for holding the lead content of lead-containing molten steel alloys that leaches into, or infiltrates into, the purge plug. The purging gas supply tube is provided with a portion that protrudes into the retention chamber, thereby preventing the lead content of lead-containing molten steel alloys from entering and blocking the purging gas supply tube. | 05-05-2016 |
20160067775 | TUBE EXCHANGE DEVICE FOR HOLDING AND REPLACING A POURING NOZZLE, AND ASSEMBLY OF A TUBE EXCHANGE DEVICE AND A POURING NOZZLE - A tube exchange device for holding and replacing refractory nozzle comprises a frame with a casting opening. The frame is configured to be fixed to the lower side of a metal casting vessel. The frame is has an upper portion and a lower portion joining at a middle section plane in which an inner nozzle and an exchangeable pouring nozzle form a sliding contact. The lower portion of the frame contains a displacing element and a guiding element disposed for displacing and guiding the nozzle from a standby position to a casting position, and a pressing element pressing the nozzle at the casting position towards the upper portion of the frame. In a combination of the tube exchange device and a nozzle, the nozzle comprises bearing elements mating with the clamping elements of the tube exchange device. | 03-10-2016 |
20160039719 | ZIRCONIA BASED COATING FOR REFRACTORY ELEMENTS AND REFRACTORY ELEMENT COMPRISING OF SUCH COATING - A coating composition for applications at temperatures higher than 1200 degrees C. comprises (a) between 80.0 and 99.9 wt. % of unstabilized zirconia; and (b) between 0.1 and 5.0 wt. % of a liquid phase former which is solid at ambient temperature and either melts or reacts, or decomposes to form a liquid phase above a temperature not lower than 1000 degrees C.; wherein the wt. % are expressed in terms of total solid weight of the coating composition at room temperature. A refractory element that may be made of a carbon bonded refractory comprises a coated surface comprising a first coating of the coating composition as defined above. | 02-11-2016 |
20150343522 | SUBMERGED ENTRY NOZZLE - 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. | 12-03-2015 |
20150300741 | GAS PURGING PLUG COMPRISING WEAR INDICATORS - A gas purging plug for blowing gas into a metallurgical vessel, having the form of an elongated body made of a first refractory material, contains a final visual wear indicator in the form of an elongated core extending from an inlet end to a distance, along a central longitudinal axis, less than the length of the elongated body. The final visual wear indicator is made of a second refractory material that differs in visual appearance from the first refractory material between 800 and 1500 degrees C. The plug also contains an intermediate visual wear indicator extending from the inlet end to a point between the end of the final visual wear indicator and the opposite end of the elongated body. The intermediate visual wear indicator is made of a third refractory material that differs in visual appearance from the first and second refractory materials between 800 and 1500 degrees C. | 10-22-2015 |
20150115510 | PURGE PLUG - A refractory device, such as a replacement purge plug containing a refractory material, is configured to be inserted in the bottom of a ladle for introducing purging gas through a heat of molten metal in a ladle. One or more geometrical features on the lateral surface of the purge plug facilitate the installation of the purge plug into a housing block that has been subjected to erosion. | 04-30-2015 |
20150114586 | INTUMESCENT SEALING FOR METAL CASTING APPARATUSES - 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. | 04-30-2015 |
20140339271 | DOUBLE ENTRY CHANNEL LADLE BOTTOM - 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. | 11-20-2014 |
20140300036 | REFRACTORY PURGING DEVICES - A device for blowing gas into a metallurgical vessel contains at least one gas flow channel fluidly connecting a gas inlet located at one end to a gas outlet located at the opposite end. The channel is in the shape of a slit. The gas channel contains a series of continuous concave bridges connecting the opposing surfaces defining the channel, with their concave side oriented towards the gas outlet. The concave bridges are disposed in a staggered arrangement, such that any shortest line running from the gas outlet to the gas inlet of the channel necessarily intercepts the concave side of at least one bridge. The device is resistant to clogging by infiltrated molten metal or slag. | 10-09-2014 |
20140245795 | HIGH-TEMPERATURE ROLL - A roll for use in glass manufacture, such as in the production of non-dusting TFT glass, includes a hollow silica cylinder. A rod extends through the interior of the silica cylinder. A cooling volume is contained within the cylinder and extends around the rod. End caps are mechanically fixed to the roll. Pulling flats are fixed in place by inner and outer end plates. A compression fitting secures at least the outer end plate to the roll. The rod may serve to reinforce the roll and may be secured to the shaft by a plurality of supports. The supports accommodate differences in thermal expansion. | 09-04-2014 |
20140117057 | IMPACT PAD - 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. | 05-01-2014 |
20140061257 | REFRACTORY ELEMENT, ASSEMBLY AND TUNDISH FOR TRANSFERRING MOLTEN METAL - A refractory element is configured to prevent or limit steel reoxidation in a steel casting process. The refractory element contains a base surrounded by a periphery in a specified geometrical arrangement. The refractory element is constituted of a base surrounded by a periphery in a specified geometrical arrangement. | 03-06-2014 |
20130249136 | CAST BODIES, CASTABLE COMPOSITIONS, AND METHODS FOR THEIR PRODUCTION - 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. | 09-26-2013 |
20130098952 | SUBMERGED ENTRY NOZZLE - 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. | 04-25-2013 |
20130056506 | INNER NOZZLE FOR TRANSFERRING MOLTEN METAL CONTAINED IN A VESSEL, SYSTEM FOR CLAMPING SAID NOZZLE AND CASTING DEVICE - An inner nozzle is capable of being mounted onto a tube exchange device for holding and replacing an exchangeable pouring nozzle for casting molten metal out of a vessel. The tube exchange device is constructed of a frame with a casting opening. The frame is configured to be fixed to the lower side of a metal casting vessel and has a first, upper portion and a second, lower portion, joining at a middle section plane defining the plane where an inner nozzle and an exchangeable pouring nozzle form a sliding contact. The upper side portion of the frame receives and clamps in place a bearing surface of an inner nozzle at its pouring position. The lower portion comprises elements for loading and moving along a first direction (X) into casting position an exchangeable pouring nozzle. At least two clamping elements are arranged transverse to the first direction (X). | 03-07-2013 |
20130011228 | Method and Apparatus for Dry-Conveying Material for Dry Gunning Application - A method and apparatus for conveying dry material for a gunning application make use of a rotary air lock in communication with a material source and an inductor. The material is supplied through the rotary air lock to the inductor under a pressure greater than the outlet pressure of the inductor. | 01-10-2013 |
20130008927 | INNER NOZZLE FOR TRANSFERRING MOLTEN METAL CONTAINED IN A METALLURGICAL VESSEL AND DEVICE FOR TRANSFERRING MOLTEN METAL - An inner nozzle for casting molten metal from a metallurgical vessel incorporates a substantially tubular portion with an axial through bore, and an inner nozzle plate comprising a bottom flat contact surface and a second surface opposite the bottom contact surface and joining the wall of the tubular portion to the side edges of the plate. The inner nozzle incorporates a metallic casing cladding at least a portion of some or all of the side edges and second surface but not the sliding plane of the inner nozzle plate. The cladding is provided with a metallic bearing surface, facing towards and recessed with respect to the contact surface and extending from the cladded portion of the side edges beyond the perimeter of the contact surface. The bearing surface is defined by the ledges of at least two separate bearing elements distributed around the perimeter of the plate. | 01-10-2013 |
20120273531 | ASSEMBLY OF A NOZZLE AND SURROUNDING ELEMENT - A tundish assembly, including an element, for preventing or limiting steel reoxidization in the continuous casting of molten steel, is used in combination with a refractory nozzle. The element has an orifice engaging the outer surface of the nozzle, a main surface surrounding the main orifice and having a lowest level lower than the top outer edge of the nozzle inlet portion, and a periphery having an upper face surrounding the man surface of the element. The upper face of the periphery of the element is higher than the main surface of the element and is higher than the surface of the bottom well of the tundish. The main orifice of the element is off-center with respect to the main surface and the upper face of the periphery may have various heights. The main surface of the element is arranged so as to contact molten steel in a tundish. | 11-01-2012 |
20120142518 | CEMENT-FREE REFRACTORY - A cement free refractory mixture contains aluminum oxide, silicon carbide, fumed silica, aluminum metal, an anti-oxidant, reactive alumina, and a carbon-bearing material. The mixture can be formed by conventional techniques to create refractory articles to contain or direct the flow of liquid metals. Refractory articles formed by the mixture do not require firing to achieve an initial cure. | 06-07-2012 |
20120037831 | DRIVE DEVICE OF A REGULATION VALVE FOR CASTING LIQUID METAL - A device for driving a regulation valve for casting liquid metal contains a main rod controlling the opening and closing of the valve, and a coupler linking the main rod and the valve. The device also contains a coupler controller able to activate and deactivate the coupler, enabling linkage and detachment of the main rod and the valve. | 02-16-2012 |
20110293365 | CEMENT PLANT REFRACTORY ANCHOR - A cement plant refractory anchor ( | 12-01-2011 |
20110278331 | CASTING SHROUD, MANIPULATION DEVICE FOR THIS SHROUD, AND DEVICE FOR DRIVING A VALVE - A manipulation device for a shroud for casting liquid metal comprises holding means for the shroud, downstream of a metal flow control valve, this valve being able to assume an open configuration and a closed configuration under the action of drive means. The manipulation device comprises fixing means affixed to the drive means for the valve. A ladle shroud for the flow of liquid metal from a casting ladle to a metal tundish has a longitudinal axis and comprises a shroud gripping head at one end. The gripping head is fusiform. | 11-17-2011 |
20110248055 | LADLE SHROUD FOR LIQUID METAL CASTING INSTALLATION - The present invention relates to a ladle shroud ( | 10-13-2011 |
20110240246 | LADLE SHROUD TRANSPORT/STORAGE DEVICE FOR TRANSFERRING LIQUID METAL - One subject of the invention is a device for transporting and storing at least one ladle shroud ( | 10-06-2011 |
20110227267 | SUPPORT HEAD FOR HANDLING A LADLE SHROUD - The present invention relates to a support head ( | 09-22-2011 |
20110226438 | REUSABLE CASTING MEMBER - The present invention relates to a casting element ( | 09-22-2011 |
20100222201 | Cast Bodies, Castable Compositions, And Methods For Their Production - 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. | 09-02-2010 |
20100218559 | HIGH TEMPERATURE ROLL - The present invention describes a roll for use in glass manufacture, especially non-dusting TFT glass. The roll may include a hollow fused silica cylinder. End caps are mechanically fixed to the roll. Pulling flats are fixed in place by inner and outer end plates. A compression fitting secures at least the outer end plate to the roll. The roll may be reinforced with an internal metal rod that is secured to the shaft by a plurality of supports. The supports accommodate differences in thermal expansion. | 09-02-2010 |
20090168831 | ELECTRIC ARC FURNACE ROOF TOP AND CENTRAL PORTION FOR THIS ROOF TOP - An electric arc roof furnace top contains a central portion and a peripheral portion surrounding the central portion. Each of these portions has an inner surface suitable for facing the furnace inner space. The inner surfaces of the peripheral and central portions form together a step so as to raise the inner surface of the central portion in relation to the inner surface of the peripheral portion with respect to the furnace inner space. | 07-02-2009 |
20090160108 | Refractory Article and Production Process Thereof - The present invention relates to refractory articles in general having improved surface properties. The objective of the invention is to propose an improvement of the refractory articles comprised of a fused silica matrix which will overcome the some of the defects while keeping the excellent known properties of the fused silica matrix. This objective is reached when a sintered ceramic phase is present in the porosity of at least a portion of at least a surface of the matrix. The present invention also relates to a process for producing such an article. | 06-25-2009 |
20080292524 | Crucible for the Treatment of Molten Silicon - A crucible for the treatment of molten silicon includes a basic body with a bottom surface and lateral walls defining an inner volume. The basic body comprises at least 65% by weight of silicon carbide, and from 12 to 30% by weight of a constituent selected from silicon oxide or nitride. Moreover, the basic body comprises at least one silicon oxide and/or nitride coating, at least on the surfaces defining the inner volume of the crucible. | 11-27-2008 |
20080260608 | Crucible for the Crystallization of Silicon and Process for Making the Same - A protective coating is prepared for, and applied to, crucibles used in the handling of molten materials that are solidified in the crucible and then removed as ingots. Crucibles containing this protective coating may be used for the solidification of silicon. The coating has a specified oxygen content and contains a mineral binder and silicon nitride or silicon oxynitride. | 10-23-2008 |