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| Number | Title | Issue Date |
| 7134300 | Method for controlling foam production in reduced pressure fining A method for controlling the foam produced when a molten material encounters reduced pressure in a vacuum chamber includes passing the molten material through an aging zone in the vacuum chamber in which the molten material is allowed to drain from between the bubbl... | 11/14/2006 |
| 7037462 | Overflow transfer furnace and control system for reduced oxide production in a casting furnace An apparatus for transferring molten metal from a melting furnace to a casting furnace is provided. A sensing and control system for the transfer of molten metal from a transfer furnace to a casting furnace is also described. The combination of the transfer apparatu... | 05/02/2006 |
| 6939388 | Method for making materials having artificially dispersed nano-size phases and articles made therewith A method for forming a nanocomposite material and articles made with the nanocomposite material are presented. The method comprises providing a molten material; providing a nano-sized material, the nano-sized material being substantially inert with respect to the mo... | 09/06/2005 |
| 6902696 | Overflow transfer furnace and control system for reduced oxide production in a casting furnace An apparatus for transferring molten metal from a melting furnace to a casting furnace is provided. A sensing and control system for the transfer of molten metal from a transfer furnace to a casting furnace is also described. The combination of the transfer apparatu... | 06/07/2005 |
| 6547850 | Method for mixing particles into a liquid medium A method for mixing particles in a liquid or semi-liquid medium, such as ceramic reinforcing particles in a molten metal or metal alloy matrix for the production of stir-cast metal matrix composite (MMC) materials. The particles can be introduced under th... | 04/15/2003 |
| 6508977 | Reinforced refractory shaft design for fluxing molten metal A shaft for use with molten aluminum using an impeller mounted on the shaft comprising a protective refractory sleeve resistant to attack by molten aluminum, the protective sleeve employing a reinforcing media and mounted on the shaft to extend above and ... | 01/21/2003 |
| 6432163 | Metal refining method using differing refining oxygen sequence A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent p... | 08/13/2002 |
| 6315944 | Plant for casting metal with particles suspended therein Molten metal (6) in a furnace (5) and containing particles of solid material (not shown) in suspension is cast in moulds (1) conveyed continuously past the mould-filling station shown by a conveyor (4). To maintain the particles in suspension and keep the... | 11/13/2001 |
| 6299828 | Shaft design for fluxing molten metal A shaft for use in a method for treating molten aluminum using an impeller mounted on the shaft comprising a protective refractory sleeve resistant to attack by molten aluminum, the protective sleeve mounted on the shaft by casting to extend above and bel... | 10/09/2001 |
| 6176894 | Supersonic coherent gas jet for providing gas into a liquid A system for establishing and maintaining a supersonic coherent gas jet, effective with either an oxidizing or an inert gas, employing a converging/diverging nozzle for establishment of a non-disruptive initial supersonic velocity, and a slower moving def... | 01/23/2001 |
| 5919283 | Method and apparatus for introducing metal chips into molten metal bath An inert gas bubble-actuated molten metal pump is located between one section of a metal-melting furnace and a second section to pump molten metal from the one section, wherein the molten metal is at a higher temperature, into the second section, wherein ... | 07/06/1999 |
| 5917115 | Apparatus for and method of treating liquid metal A method of and apparatus for degassing molten metal in a vacuum treatment chamber defined by a open topped ladle containing the molten metal and a generally cylindrical refractory lined cover having a closed top and an open bottom positioned on the ladle... | 06/29/1999 |
| 5863314 | Monolithic jet column reactor pump A jet column reactor apparatus for moving molten metal in a bath of such metal is formed with a monolithic refractory body.... | 01/26/1999 |
| 5814125 | Method for introducing gas into a liquid A method for introducing gas into a liquid wherein a gas stream is ejected from a lance spaced above the liquid surface and directed from the lance onto the liquid surface. The gas retains substantially all its original jet axis velocity when it contacts ... | 09/29/1998 |
| 5772725 | Method for fluxing molten metal A method of treating a body of molten metal to produce high levels of shear forces in the body. The method comprises providing a body of molten metal; inductively moving molten metal in the body in one direction at outer regions thereof and in an opposite... | 06/30/1998 |
| 5735935 | Method for use of inert gas bubble-actuated molten metal pump in a well of a metal-melting furnace and the furnace An inert gas bubble-actuated molten metal pump is located in a metal-melting furnace to effect circulation of molten metal throughout the furnace. The inert gas employed to actuate the molten metal pump is captured beneath a heat-resistant and flame-resis... | 04/07/1998 |
| 5718742 | Ladle and impeller rotation for fluxing molten metal An improved method for processing a body of molten metal using an impeller and a rotatable container, the method including increasing shear forces in the body of molten aluminum and reducing vortex formation, the method comprising the steps of providing a... | 02/17/1998 |
| 5702502 | Method for direct use of chromite ore in the production of stainless steel A three-stage process for obtaining metallic Cr units insitu during the production of stainless steel. Raw chromite ore or a concentrate produced from chromite ore is mixed with a carbonaceous reductant and slagging agents are added to an iron bath (24) f... | 12/30/1997 |
| 5660614 | Gas treatment of molten metals A method of and apparatus for treating molten metal to achieve effective removal of such unwanted inclusions as gases, alkali metals, entrained solids, and the like. The method comprises continuously introducing molten metal into a container forming a tro... | 08/26/1997 |
| 5632801 | Process for making metal-matrix composites mixed with reinforcing materials by forced drafting A process for making metal-matrix composites includes: purging a refining chamber filled with molten metal matrix in a furnace by an inert gas such as nitrogen gas; filling a reinforcing material, preferably with particulates, in a bucket suspended above ... | 05/27/1997 |
| 5527381 | Gas treatment of molten metals A method of and apparatus for treating molten metal to achieve effective removal of such unwanted inclusions as gases, alkali metals, entrained solids, and the like. The method comprises introducing molten metal into a trough, such as the trough provided ... | 06/18/1996 |
| 5468280 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace with simultaneous degassing of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 11/21/1995 |
| 5462580 | Method for molten metal treatment Disclosed is an improved method for dispersing a treatment media in a body of molten metal using an impeller, nozzles, and other mixing means to disperse the media in the body of molten metal, the method producing increased shear forces in the body of mol... | 10/31/1995 |
| 5462581 | Method for treating molten metal There is provided an improved method for dispersing a treatment media in a body of molten metal using an impeller to disperse the media in the body of molten metal, the method producing increased shear forces in the body of molten metal and reducing vorte... | 10/31/1995 |
| 5453110 | Method of gas fluxing with two rotatable dispensers A method of gas fluxing molten aluminum with at least two, relatively small diameter upper and lower rotatable dispersers located in the molten aluminum and mounted on a shaft. Fluxing gas is added to the molten aluminum beneath each of the rotatable disp... | 09/26/1995 |
| 5403381 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace with simultaneous degassing of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 04/04/1995 |
| 5397377 | Molten metal fluxing system An improved process for treating a body of molten metal is disclosed wherein a rotating impeller is used to disperse treatment media in the body. The process comprises the steps of providing a body of molten metal to be treated, the body having an upper r... | 03/14/1995 |
| 5397378 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace with simultaneous alloying of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/14/1995 |
| 5395424 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace using intermittent or pulsating insert gas feed A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/07/1995 |
| 5395094 | Means of conveying molten metal from one place to another in a metal-melting furnace with simultaneous alloying of the melt A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 03/07/1995 |
| 5364450 | Molten metal treatment There is provided an improved method for dispersing a treatment media in a body of molten metal using an impeller to disperse the media in the body of molten metal, the method producing increased shear forces in the body of molten metal and reducing vorte... | 11/15/1994 |
| 5350440 | Furnace with deflecting surface and method of charging metal solids A furnace (1) has a main holding (2) and a charging well (4) into which molten metal from the holding portion is circulated by means of an electromagnetic pump (7). Metal enters the well as a tangential flow and a stationary turbulator (10) is located in ... | 09/27/1994 |
| 5342429 | Purification of molten aluminum using upper and lower impellers Process and apparatus for improving fluxing gas dispersion in treating molten aluminum by increasing the fluxing gas surface area. The process includes the use of a molten body of aluminum and a gas dispersing unit in the body of molten aluminum, the disp... | 08/30/1994 |
| 5340379 | Jet flow device for injecting gas into molten metal and process A device is described for injecting gas into molten metal, e.g. molten aluminum, in a furnace chamber. It comprises: (a) a stirring apparatus having a reservoir chamber separate from the furnace chamber, a connector portion with an orifice connecting the ... | 08/23/1994 |
| 5314525 | Method for treating a liquid with a gas using an impeller An improved impeller head is provided for treating molten metals and other liquid systems with a gas. A multiple-vaned impeller head is adapted for mounting on a hollow impeller shaft for rotation within the liquid The edges of the impeller vanes are exte... | 05/24/1994 |
| 5268020 | Dual impeller vortex system and method The invention is directed to a method and a system that provides for a dual action fluid media circulating and fluid media charge entraining apparatus for use in a chamber having fluid media at a predetermined level into which fluid media a charge to be e... | 12/07/1993 |
| 5215573 | Treatment of melts in a ladle and apparatus for such treatment A ladle arrangement intended for use when treating a metal melt, in which gas or gas/powder mixture is delivered to the melt (2) which substantially fills the ladle (1), and departing gases are extracted by suction through a hood mounted above the ladle. ... | 06/01/1993 |
| 5203910 | Molten metal conveying means and method of conveying molten metal from one place to another in a metal-melting furnace A method, for the conveyance of molten metal from one place to another, in a high-temperature molten metal pool in a metal-melting furnace or out of said molten metal pool, employing an at least partially-inclined elongated conveying conduit and gas feed ... | 04/20/1993 |
| 5198180 | Gas dispersion apparatus with rotor and stator for molten aluminum refining The maximum useful rate of aluminum refining is substantially increased by the incorporation of baffle means across the refining chamber under the rotor of a spinning nozzle assembly positioned in the refining chamber during aluminum refining operations.... | 03/30/1993 |
| 5160693 | Impeller for treating molten metals An improved impeller head is provided for treating molten metals and other liquid systems with a gas. A multiple-vaned impeller head is adapted for mounting on a hollow impeller shaft for rotation within the liquid. The edges of the impeller vanes are ext... | 11/03/1992 |
