Fused Cast Or Fused Material Containing Patents (Class 501/115)
  • Patent number: 9145320
    Abstract: The invention relates to a particulate powder, said powder having a median circularity of greater than 0.87 wt % and less than 9.0 wt % of particles having a size greater than 100 ?m. The powder and at least 80 wt % of the particles have a chemical composition in wt % on the basis of the oxides and for a total of 100%: Cr2O3+Al2O3+ZrO2+MgO+Fe2O3+SiO2+TiO2?90%; Cr2O3+Al2O3+MgO?60%; Cr2O3?9%; 20%?SiO2?0.5%; and other oxides: ?10%. The invention can be used for a glass furnace.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: September 29, 2015
    Inventors: Cyril Linnot, Lionel Moitrier, Yves Marcel Leon Boussant Roux, Olivier Citti, Richard Avedikian
  • Patent number: 7244687
    Abstract: The invention relates to a composition for the production of a refractory ceramic moulded body, a non-fired or fired moulded body formed from the composition and a possibility for use.
    Type: Grant
    Filed: December 6, 2003
    Date of Patent: July 17, 2007
    Assignee: Refractory Intellectual Property GmbH & Co. KG
    Inventors: Johann Eder, Rainer Neuböck
  • Patent number: 7112548
    Abstract: An artificial ore, characterized in that it is prepared by melting one of silicon, a silicon compound, tourmaline and a ceramic, and adding iron, aluminum and calcium into the resultant melt to melt them, followed by cooling to a mass. The artificial core has good thermal properties such as heat conductivity, heat diffusion coefficient and fire resistance temperature, can dissociate molecules in a liquid, and further can prevent the electrification by static charge and the transmission of an electromagnetic wave.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: September 26, 2006
    Inventor: Hatsuichi Matsumoto
  • Patent number: 6887810
    Abstract: A material for refractory shaped bodies or compounds, the material being a pleonaste and/or a spinel of the pleonaste type. In addition to FeOx and Al2O3, the material also includes MgO. The ratio of the iron in the material is calculated as Fe2O3:Al2O3 and ranges from 30:70 to 60:40. The material contains from 20 to 60% by mass of MgO, as based on Fe2O3+Al2O3.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: May 3, 2005
    Assignee: Refratechnik Holdings GmbH
    Inventors: Peter Bartha, Hans-Jurgen Klischat, Holger Wirsing, Guido Weibel
  • Patent number: 6753283
    Abstract: A material for refractory shaped bodies or compounds, the material being a pleonaste and/or a spinel of the pleonaste type. In addition to FeOX and Al2O3, the material also includes MgO. The ratio of the iron in the material is calculated as Fe2O3:Al2O3, and ranges from 30:70 to 50:40. The material contains from 20 to 60% by mass of MgO, as based on Fe2O3+Al2O3.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: June 22, 2004
    Assignee: Refratechnik Holding GmbH
    Inventors: Peter Bartha, Hans-Jurgen Klischat, Holger Wirsing, Guido Weibel
  • Patent number: 6740612
    Abstract: A resistor, which is solidified from a melt, is provided for a refractory shaped body, and includes a refractory mineral metal-oxide main component having elasticizers a general formula A2+B3+2O4 in an amount so that solubility of the main component for the elasticizer is exceeded with the elasticizers providing precipitation areas in the main component. The resistor is produced by a joint melting of the main component and the oxides which form the elasticizers. A process is provided for the production of the resistor.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: May 25, 2004
    Assignee: Refratechnik Holding GmbH
    Inventors: Peter Bartha, Hans-Jurgen Klischat, Holger Wirsing, Guido Weibel
  • Patent number: 5958814
    Abstract: A composite and monolithic refractory structure, particularly adapted for making furnaces for glassmaking or the like, constituted by a block-shaped component made of electro-cast refractory material based on oxides of aluminum, zirconium, silicon, and the like, having shapes and dimensions that are adapted for its uses, inside which at least one protective element is monolithically inserted; the protective element is highly resistant to the attack of molten glass baths or the like and is chosen among metals, noble metals, refractory metals, refractory materials, conventional and non-conventional ceramic materials, such as carbides, nitrides, borides, and the like, or graphite-based materials, alloys and/or compounds and/or composites thereof; the element is provided substantially in the shape of a plate that is shaped and sized so as to have a profile that is similar to the peripheral profile of the refractory block and is arranged, inside the block, so that its surfaces are located at, and proximate to, the
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: September 28, 1999
    Assignee: Refel S.p.A.
    Inventors: Giancarlo Dinelli, Alessandro Fantinel
  • Patent number: 5418199
    Abstract: A refractory mix made comprising magnesite having an MgO content of at least about 95 wt. % and fused spinel-zirconia grain comprising 1 to 40 wt. % zirconia and refractory shapes, particularly brick, made therefrom.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: May 23, 1995
    Assignee: Indresco Inc.
    Inventor: Richard J. Knauss
  • Patent number: 5322827
    Abstract: A burned chrome-containing refractory and method which provides a refractory having less than 5 ppm total soluble chromium. Such product is obtained by adding to the starting mix less than 10 wt. % (often less than 3 wt. %) zirconia, silica, zircon, or molybdic oxide either individually or in combination.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: June 21, 1994
    Assignee: Indresco, Inc.
    Inventors: David J. Michael, Albert L. Renkey, Kenneth A. McGowan
  • Patent number: 5021375
    Abstract: Chrome oxide refractory materials which are a mixture of coarse fused chrome oxide particles and fine chrome oxide particles are disclosed as resistant to silica attack. The refractory materials have a Cr.sub.2 O.sub.3 content of at least about 98.5% and substantially no MgO.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: June 4, 1991
    Assignee: Norton Company
    Inventor: Anthony K. Butkus
  • Patent number: 4999325
    Abstract: A rebonded, fused brick resulting from burning a mix consisting essentially of a fused magnesite chrome grain, a fused chrome-magnesite grain or mixtures thereof, and a chrome ore having a Cr.sub.2 O.sub.3 /(Al.sub.2 O.sub.3 +Fe.sub.2 O.sub.3) ratio of at least about 1.15, a maximum silica content of about 3.85, and an Fe.sub.2 O.sub.3 content of less than about 25% by weight.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: March 12, 1991
    Inventor: David J. Michael
  • Patent number: 4657878
    Abstract: A novel method of making a refractory material is disclosed comprising the steps of providing an electrical arc metal furnace, charging that furnace with a charge of refractory oxide, and selecting voltage, amperage and electrode spacings to create novel "hum and scum" melt conditions. This hum and scum condition is maintained until said charge is substantially melted. The described technique is particularly useful for melting magnesia chrome materials to produce fusion cast refractory products which are highly reduced and quite dense. The elaboration of this product requires higher energy input per pound concurrent with an increased consumption of reducing materials compared with standard preparation conditions. The resulting product exhibits higher oxidation weight gains, higher densities, lower porosities, high cold crush strengths, more thermal shock resistance, and better corrosion-erosion resistance than similar magnesia chrome refractory products fused using prior "arc and bark" processes.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: April 14, 1987
    Assignee: Corhart Refractories
    Inventors: Thomas A. Clishem, Leonard W. Pokallus
  • Patent number: 4507395
    Abstract: A raw batch for a ramming cement is shown adapted to be fired in place to protect studded boiler tubes and the like. The fired cement includes a major proportion of a particulate chromia-magnesia spinel that is bonded in-situ with a clay phase including kaolinite and montmorillonite components and a reacted chromia and magnesia compound together with sodium hexametaphosphate.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: March 26, 1985
    Assignee: Norton Company
    Inventor: Cecil M. Jones
  • Patent number: 4490474
    Abstract: A fused cast ceramic composition having superior corrosion and stoning resistance in the presence of E glass when compared with prior art compositions having comparable chromia content. The composition is a solidified fusion of from about 65 to about 98 weight percent Cr.sub.2 O.sub.3, from about 0.75 to about 4 weight percent MgO and from about 1 to about 34.25 weight percent alumina. The invention also comprises the method for manufacturing the composition by fusing the appropriate materials at the required concentrations.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: December 25, 1984
    Assignee: Kennecott Corporation
    Inventor: Walter T. Staten
  • Patent number: 4366256
    Abstract: Refractory chrome-magnesia bricks and compositions composed of a granular fused material having a grain size of 12 mm or less, and a content of from 71 to 83 wt. % Cr.sub.2 O.sub.3 and from 17 to 29 wt. % MgO, the minimum content of Cr.sub.2 O.sub.3 and MgO being 94 wt. %.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: December 28, 1982
    Assignee: Osterreichisch-Amerikanische Magnesit Aktiengesellschaft
    Inventor: Gunther L. Mortl
  • Patent number: 4348485
    Abstract: A spinel type dense fused refractory product having excellent corrosion resistance comprises a crystalline structure consisting essentially of more than 50% by weight of composite spinel phase comprising RO component selected from MgO and FeO and R'.sub.2 O.sub.3 component selected from Cr.sub.2 O.sub.3, Al.sub.2 O.sub.3 and Fe.sub.2 O.sub.3 and periclase phase and a small content of glass matrix phase which consists essentially of the following constituents, analytically on a weight basis; a ratio of Cr.sub.2 O.sub.3 to Al.sub.2 O.sub.3 of 3.5 to 5.5; and 20% to 40% of MgO; 1.5% or less of CaO; 15% or less of Fe.sub.2 O.sub.3 (FeO is also calculated for Fe.sub.2 O.sub.3) and 5% or less of SiO.sub.2.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: September 7, 1982
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Koji Oohasi, Yutaka Hosoda, Toshio Kitamura, Eiichi Kudo
  • Patent number: 4308067
    Abstract: The invention refers to an unshaped refractory composition which can be used in the construction of glass furnace hearths and which comprises by weight:(a) 55 to 99% of particles of a fused cast refractory material, the fused cast refractory material including a vitreous phase and containing, as main constituents, ZrO.sub.2, Al.sub.2 O.sub.3, SiO.sub.2, and optionally Cr.sub.2 O.sub.3 ;(b) 0 to 5% of a hydraulic cement;(c) 1 to 15% of a filler consisting of very fine, substantially spherical particles of a metal oxide;(d) 0 to 25% of fine particles of a size less than 40 microns chosen from particles of ZrO.sub.2, Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3, fused cast refractory products comprising by weight 75-85% ZrO.sub.2, 2-8% SiO.sub.2, 9-17% Al.sub.2 O.sub.3, 0.5-0.7% of other oxides, and mixtures thereof; and(e) 0.01 to 1% of a surface-active agent, the amount being with respect to the total weight of the constituents (a), (b), (c) and (d).
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: December 29, 1981
    Assignee: Societe Europeenne des Produits Refractaires
    Inventors: Jacques Guigonis, Pierre Jeanvoine