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| Number | Title | Issue Date |
| 7267158 | Control of oxide growth on molten aluminum during casting using a high moisture atmosphere A method of producing aluminum castings which includes the steps of casting a molten alloy, contacting the surface of the molten alloy with a humidified atmosphere and solidifying the alloy. The method is particularly suited for aluminum-magnesium alloys such as AA ... | 09/11/2007 |
| 6685764 | Processing molten reactive metals and alloys using fluorocarbons as cover gas This invention relates to a method for preventing the ignition of molten magnesium by contacting the molten magnesium with a gaseous mixture comprising a fluorocarbon selected from the group consisting of perfluoroketones, hydrofluoroketones, and mixtures... | 02/03/2004 |
| 6585797 | Recirculating molten metal supply system and method The melter furnace includes a heating chamber (16), a pump chamber (18), a degassing chamber (20), and a filter chamber (22). The pump chamber (18) is located adjacent the heating chamber (16) and houses a molten metal pump (30). The degassing chamber (20... | 07/01/2003 |
| 6572676 | Process for refining aluminum A process for melting an aluminum charge into molten aluminum and simultaneously refining the molten aluminum to produce a refined molten aluminum having a low hydrogen content in a direct fired furnace (10) is provided.... | 06/03/2003 |
| 6162279 | Method for fluxing molten metal using shaft design 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... | 12/19/2000 |
| 5993728 | Gas injection pump An apparatus for treating molten aluminum or zinc having a housing providing a chamber for containing a molten metal. The chamber including an inlet opening and an outlet passage. A rotatable impeller disposed within the chamber for drawing molten metal i... | 11/30/1999 |
| 5968223 | Method for heating molten metal using heated baffle A method of heating a body of molten metal passing through a treatment bay. The method comprises providing a body of molten metal in a treatment bay and providing a baffle heater in the treatment bay to contact the molten metal. The baffle heater is compr... | 10/19/1999 |
| 5958357 | Method of producing chlorine A method of liberating or producing chlorine from hexachloroethane, the method comprising the steps of providing a body comprised of solid hexachloroethane and heating the body to a temperature sufficient to cause the solid hexachloroethane to produce hex... | 09/28/1999 |
| 5917114 | Degassing of liquid aluminum and other metals Offgas recycling processes, including an argon degassing embodiment which cyclically regenerates one treatment flow path while the other treatment flow path is treating the offgas. The system is changed into a second mode to regenerate the previously trea... | 06/29/1999 |
| 5769924 | Method of treating aluminum with chlorine produced from chlorocarbon compounds A method of liberating or producing chlorine from hexachloroethane, the method comprising the steps of providing a body comprised of solid hexachloroethane and heating the body to a temperature sufficient to cause the solid hexachloroethane to produce hex... | 06/23/1998 |
| 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 |
| 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 |
| 5630863 | Method for fluxing molten-metal An improved method for dispersing high levels of fluxing gas in a body of molten aluminum using an impeller or disperser to disperse the fluxing gas in the body of molten aluminum, the method producing increased shear forces in the body of molten aluminum... | 05/20/1997 |
| 5616167 | Method for fluxing molten metal An improved method for treating a body of molten aluminum using an impeller suitable for dispersing fluxing gas or solid particles in the body of molten aluminum. The method produces increased shear forces in the body of molten aluminum and reduces vortex... | 04/01/1997 |
| 5536296 | Process for treating molten aluminum with chlorine gas and sulfur hexafluoride to remove impurities There is disclosed an improved process for treating molten aluminum or aluminum alloys containing impurities, such as alkali metals, alkaline earth metals and hydrogen, to reduce the amount of impurities contained therein by in-line rotor degassing. The p... | 07/16/1996 |
| 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 |
| 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 |
| 5405578 | Method for preparing master alloy hardeners for use in preparing an aluminum alloy This invention relates to master alloy hardeners for use in preparing aluminum base alloys. The respective concentrations of the alloying elements in the master alloy hardener are a multiple equal to or greater than 2 of the concentrations of such element... | 04/11/1995 |
| 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 |
| 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 |
| 5226950 | Liquid-in-liquid sensor and method The present invention includes process and apparatus for continuously monitoring or detecting a liquid element or compound in another, different liquid including introducing a gas into a first liquid, measuring bubble size of bubble formation of the gas i... | 07/13/1993 |
| 5145514 | Treating aluminium with chlorine When molten aluminium is treated with chlorine to remove alkali and alkaline earth metals and hydrogen, there is formed a brittle oxide crust which does not protect the metal from oxidation. This problem is solved by admixing with the chlorine a minor pro... | 09/08/1992 |
| 5090998 | Purification of metal melts with halogen gas generated in an electrolysis cell The process for purifying a metal melt operates with an active gas introduced into the lower region thereof and consisting of an inert carrier gas and an active, gaseous halogen which are introduced under control into a vessel with the stagnant or flowing... | 02/25/1992 |
| 5087292 | Process and apparatus for treating a liquid with a gas The invention relates to the treatment of a liquid with a gas. A gas injector, for example oxygen, is surrounded with a sheath to carry a flow of a liquid under treatment (for example lead) which is taken up and circulated by the pump. The end of the inje... | 02/11/1992 |
| 5071523 | Two stage lithium transport process The present invention provides a process for purifying aluminum and lithium including recovering aluminum and lithium through layered electrolysis through a lithium transport cell to form purified lithium metal and residual aluminum and purifying the resi... | 12/10/1991 |
| 5029821 | Apparatus for controlling the magnesium content of molten aluminum A method for controlling the magnesium content of molten aluminum includes the steps of injecting a halogen gas into the molten aluminum, sampling a portion of the resulting gases evolved from the molten aluminum, detecting the presence of constituents in... | 07/09/1991 |
| 5024696 | Apparatus and method for degassing molten metal An improved apparatus and method of the inline degassing of the molten metal employing a fluxing gas.... | 06/18/1991 |
| 4992241 | Recycling of metal matrix composites A process is described for recycling scrap aluminum-matrix composites, e.g. gates and risers from a casting operation. A melt of the scrap composite is provided in a treatment vessel by heating at a temperature of 720°-750° C., such as to avoid unwanted... | 02/12/1991 |
| 4908060 | Method for treating molten metal with a rotary device A rotary device for dispersing gas in molten metal comprises a hollow shaft and a hollow rotor attached to the shaft, the rotor having a plurality of vanes extending from the shaft towards the periphery of the rotor and dividing the rotor into a plurality... | 03/13/1990 |
| 4897115 | Method of, purifying a melt, which, besides one or more impurities, essentially contains a light metal, in particular aluminum Apparatus for purifying a melt which, besides one or more impurities to be volatilized, contains essentially a light metal, in particular aluminum. The apparatus comprises a vacuum processing vessel, a vacuum pump, one or more conduits for supplying the m... | 01/30/1990 |
| 4770697 | Blanketing atmosphere for molten aluminum-lithium alloys or pure lithium Blanketing of molten aluminum-lithium alloys is performed under a nontoxic and noncorrosive dichlorodifluoromethane containing gas atmosphere, which produces a thin self-passivating fluxing film on the melt surface. The blanketing atmosphere protects the ... | 09/13/1988 |
| 4769069 | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with halide stripping agent An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearin... | 09/06/1988 |
| 4758316 | Aluminum-lithium scrap recovery A process is provided for melting and reclaiming aluminum and lithium from aluminum-lithium scrap including heating a molten salt in a heat bay, mixing the heated salt with aluminum-lithium scrap in a charge bay to form a molten mixture, separating alumin... | 07/19/1988 |
| 4668351 | Method of producing aluminum A method of purifying aluminum contaminated with cerium or other rare earth metal comprises bringing the molten metal into contact with a halogenating agent. Preferred halogenating agents are aluminum fluoride for reducing cerium levels to around 0.1% to ... | 05/26/1987 |
| 4607825 | Ladle for the chlorination of aluminium alloys, for removing magnesium The present invention relates to a ladle for the chlorination in co-flow mode of aluminium alloys in a molten state. It is divided by a vertical partition (6) which, with the bottom, leaves a space (7) for the flow of the metal, into a feed compartment (8) and... | 08/26/1986 |
| 4556419 | Process for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefrom Hydrogen gas and non-metallic inclusions are removed from molten aluminum by a process comprising the steps of maintaining an atmosphere containing BF3 gas in a treating vessel above the surface of molten aluminum placed therein, introducing a ... | 12/03/1985 |
| 4525212 | Decontamination of aluminum by chlorination Decontaminating an aluminum melt by chlorination wherein the melt is blanketed with a layer of molten flux containing calcium oxide to consume any Cl2 and/or AlCl3 offgasses from the melt.... | 06/25/1985 |
| 4494735 | Apparatus for degassing molten metal A gas injection nozzle design for use in a swirling tank reactor used in the degassing of molten metal with a fluxing gas. The nozzle design eliminates metal leakage from the reactor around the nozzle tip and gas leakage within the fluxing gas delivery li... | 01/22/1985 |
| 4456479 | Vacuum purification of liquid metals Molten metals having a low vapor pressure, such as aluminum, are vacuum refined to remove metallic impurities employing a lifting gas to form a metal fall above a liquid metal surface; a vacuum above the metal surface is effective in conjunction with the ... | 06/26/1984 |
