| Patent Number |
Title Of Patent |
Date Issued |
| 7176153 |
Refractory system for glass melting furnaces |
February 13, 2007 |
| A refractory system for glass melting furnaces includes alumina, zirconia, and silica mixed with a silica binder. The refractory may be formed as refractory blocks or directly onto the wear portion of a glass melting furnace. The refractory may be formed using casting, pumping, or sh |
| 6929775 |
Tundish impact pad |
August 16, 2005 |
| An impact pad formed from a refractory material for reducing the turbulence of a molten metal poured therein. The impact pad has a plurality of sidewalls, each sidewall having a plurality of spherically shaped portions. The spherically shaped portions disperse the molten metal in a v |
| 6528011 |
Colloidal silica refractory system for an electric arc furnace |
March 4, 2003 |
| The invention provides a colloidal refractory system for an electric arc furnace or another pyrometallurgical converter having a hearth, a shell, and a roof. The colloidal silica refractory includes alumina having a range of about 55 percent through about 90 percent by weight, silicon |
| 5935665 |
Firing container and method of making the same |
August 10, 1999 |
| A lightweight firing container and a method of making the same are disclosed. The firing container comprises from about 55-90% by weight of a refractory base material and from about 0.1%-80% by weight fused alumina bubbles. |
| 5916500 |
Method of lining a blast furnace |
June 29, 1999 |
| A method is provided for installing a refractory lining in a blast furnace or other metallurgical vessel. A consumable form is installed along an inner surface of an outer shell of the metallurgical vessel. The consumable form is spaced apart from the outer shell. The metallurgical v |
| 5795508 |
Method of lining a blast furnace |
August 18, 1998 |
| A method for lining a blast furnace or other metallurgical vessel in stages uses a plurality of porous consumable forms and a pumpable casting composition. A form member, including a rigid support frame and a porous consumable form mounted thereto, is installed in a lower portion of the |
| 5632937 |
Method of installing a refractory lining |
May 27, 1997 |
| A method is provided for installing a refractory lining in a metallurgical vessel having a main opening which is much smaller than the diameter of the vessel. The method is especially useful in a vessel having a circular or otherwise curved cross-section. A form or mold is assembled insi |
| 5573724 |
Ladle port assembly |
November 12, 1996 |
| A ladle port assembly having a longer use life than a conventional porous plug includes an inner refractory member constructed from a high-fired alumina-containing refractory material, a middle refractory member surrounding the inner member and also constructed from a high-fired alum |
| 5511762 |
Consumable form with degradable lining |
April 30, 1996 |
| A method of manufacturing an open top, walled member for containing a molten metal, including the steps of forming an inner wall of a mold with a metal sheet and an inner lining covering the sheet, wherein the inner wall defines an inside surface of the walled member and transferring a |
| 5505893 |
Method for manufacturing and repairing molten metal containment vessels |
April 9, 1996 |
| A method of manufacturing an open top, walled member for containing a molten metal, especially a flowing molten metal or reconstructing a worn or damaged member. The method includes the step of forming the inner walls of a mold which define the inner surfaces of the walled member of an o |
| 5494267 |
Pumpable casting composition and method of use |
February 27, 1996 |
| An improved castable refractory composition having excellent resistance to attack from slag can be efficiently transported to a destination, such as a mold, using a pump. The castable refractory composition includes about 36-92% by weight silicon carbide, about 8-20% by weight of a collo |
| 5484138 |
Consumable form with adjustable walls |
January 16, 1996 |
| An adjustable form used for forming or repairing a refractory lining includes an adjustable frame constructed from a plurality of intersecting beams, at least some of which are adjustable, and a form connected to the adjustable frame. The frame can be adjusted in at least one direction a |
| 5482248 |
Mold for manufacturing metal containment vessels |
January 9, 1996 |
| A mold for forming an open top, walled member having side walls and a bottom surface for containing a molten metal. The mold including an inner screen having a plurality of openings having inner side walls and a bottom surface. The mold further includes an outer wall, wherein the inner s |
| 5456452 |
Apparatus for making steel alloys in a tundish |
October 10, 1995 |
| A method and apparatus are provided for making steel alloys directly in a tundish. Base steel enters the tundish from a ladle. An alloying chamber having a plurality of inlets is positioned above a tundish drain. An alloying material (for example, a wire including one or more alloying |
| 5423519 |
Regenerative chamber lining and method of installation |
June 13, 1995 |
| A continuous checker column is molded and formed in situ inside a regenerative chamber, thereby eliminating the need for large numbers of individual, preformed checker bricks. A plurality of rigid molding rods or flexible cable rods are passed through, or hang from, a template installed |
| 5422323 |
Nonhazardous pumpable refractory insulating composition |
June 6, 1995 |
| A granular castable refractory composition is provided which has excellent insulating properties as well as high strength and resistance to oxidation, corrosion or erosion. The refractory insulating composition can be easily transported using a pump, and avoids the potential hazards |
| 5418198 |
Pelletizable gunning composition |
May 23, 1995 |
| A pelletizable gunning composition is provided which exhibits excellent flow characteristics, minimal release of dust, and excellent adhesion and resistance to slag. The gunning composition includes high density magnesium oxide as the primary component, and lesser quantities of powde |
| 5397105 |
Tundish nozzle assembly block with elevated and slanted opening |
March 14, 1995 |
| A two-piece tundish nozzle assembly block is provided for the drain regions of tundish vessels. The two-piece assembly block includes a lower main block firmly mounted in the refractory lining of the tundish, and a selectively removable top sleeve which, together with the refractory |
| 5391348 |
Apparatus and method for making steel alloys in a tundish |
February 21, 1995 |
| A method and apparatus are provided for making steel alloys directly in a tundish. Base steel enters the tundish from a ladle. An alloying chamber having a plurality of inlets is positioned above a tundish drain. An alloying material (for example, a wire including one or more alloying |
| 5382004 |
Tundish slag stopper with sealing rim |
January 17, 1995 |
| A slag stopper assembly for use in a tundish vessel includes a chamber for reducing the flow of slag to the tundish drain and a stopper plunger for regulating the flow of liquid metal through the drain. The chamber includes a central opening for receiving the stopper plunger, and the |
| 5348275 |
Tundish nozzle assembly block |
September 20, 1994 |
| A two-piece tundish nozzle assembly block is provided for the drain regions of tundish vessels. The two-piece assembly block includes a lower main block firmly mounted in the refractory lining of the tundish, and a selectively removable top sleeve which, together with the refractory |
| 5295667 |
Tundish baffle with fluted openings |
March 22, 1994 |
| A tundish baffle having a plurality of fluted openings is provided. The fluted openings interrupt and remove inclusions from molten metal passing through the baffle, using a plurality of obstructive peaks and valleys located at the perimeters of the openings. The fluted openings also |
| 5284296 |
System for spraying ceramic slurries onto surfaces in contact with molten metals |
February 8, 1994 |
| A system for spraying ceramic coatings on surfaces in contact with molten metals in which a constant amount of slurry made from water and ceramic powder is supplied to a pump and a hose for applying the slurry to the surface to be coated. Activation of an air valve delivers air to the ho |
| 5188796 |
Tundish impact pad |
February 23, 1993 |
| A tundish impact pad is provided for use in a tundish vessel. The impact pad has a wavy upper surface which significantly reduces the horizontal surface area in the region of impact where molten iron or steel enters the tundish vessel. This wavy surface substantially reduces the vertical |
| 5147834 |
Gunning composition |
September 15, 1992 |
| An improved gunning composition for use in the steel industry includes between 60-75% by weight of a refractory base material, 10-20% by weight of silicon carbide, 7-15% by weight of ball clay, 4-8% by weight of a silica binder material, and, optionally, 5-10% by weight of a graphite |
| 5147830 |
Composition and method for manufacturing steel-containment equipment |
September 15, 1992 |
| An improved casting composition utilizes an aqueous finely dispersed silica binder to provide reduced drying times and reduced cracking and explosion of troughs, runners and other containment equipment designed for use by the iron and steel industry. The composition is prepared by mixing |
| 5133535 |
Impact pad with horizontal flow guides |
July 28, 1992 |
| An impact pad for use in a tundish vessel utilizes outer and inner guides which partially surround the region of impact except in the direction of the one or more tundish drains. Much of the molten iron or steel entering the tundish is directed toward a drain by the inner guide or guides |
| 5131635 |
Impact pad with rising flow surface |
July 21, 1992 |
| An improved impact pad includes a plurality of channels which direct the flow of molten iron or steel toward the tundish drains, and ramps which elevate the flow in the directions of the drains. The ramps cause the molten iron or steel to follow a trajactory path after leaving the impact |
| 5091127 |
Bubble pack plastic films as patterns for producing dimpled effects in cast ceramic pieces |
February 25, 1992 |
| Dimples can be produced in the surfaces of cast ceramic pieces by casting these pieces in a mold which contains as the dimple producing pattern a layer of bubble pack. In another embodiment of the invention, there is described the mold which incorporates bubble pack to produce dimpled |
| 5072916 |
Tundish impact pad |
December 17, 1991 |
| A tundish impact pad is provided for use in a tundish vessel. The impact pad has a wavy upper surface which significantly reduces the horizontal surface area in the region of impact where molten iron or steel enters the tundish vessel. This wavy surface substantially reduces the vertical |
| 5064787 |
Ramming compositions |
November 12, 1991 |
| An improved ramming composition for use in the iron and steel industry includes between 65-80% by weight mullite, 5-15% by weight silicon carbide, 2-5% by weight graphite, 2-6% by weight ball clay, and 5-10% by weight of a binder formed from a dispersion of 15-70% by weight silica in |
| 5064175 |
Method and devices for removing alumina and other inclusions from steel contained in tundishes |
November 12, 1991 |
| Molten steel in tundishes can be contacted with high surface area ceramic shapes which remove the alumina and other impurities contained in steel. Certain ceramic shapes, in particular tundish baffles, having a large surface area which acts as alumina traps for molten steel contained in |
| 5018710 |
Method and devices for removing alumina and other inclusions from steel contained in tundishes |
May 28, 1991 |
| Molten steel in tundishes can be contacted with high surface area ceramic shapes which remove the alumina and other impurities contained in steel. Certain ceramic shapes, in particular tundish baffles, having a large surface area which acts as alumina traps for molten steel contained in |
| 4901985 |
Apparatus for spraying refractory lining |
February 20, 1990 |
| An apparatus which is adapted to move along a tundish, ladle, or the like having a generally closed lower end, enclosed sides, and an open upper end. The apparatus sprays the sides and lower end of the tundish with refractory material. The apparatus comprises a nozzle having an inlet and |
| 4851264 |
Reinforcement of refractories by pore saturation with particulated fillers |
July 25, 1989 |
| A process for reinforcing porous refractories with fillers, such as carbon particles, is provided. First, filler particles are mixed with a liquid resin to produce a liquid mixture. The mixture is allowed to seep into the pores of the refractory, preferably by immersing the refractory in |
