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| Number | Title | Issue Date |
| 7648561 | Process and apparatus for use in recycling composite materials A process for recycling composite materials includes the steps of feeding a quantity of composite material composed of at least one polymer and aluminum into at least one first reactor; heating the composite material in a non-oxidizing environment at a temperature s... | 01/19/2010 |
| 7217312 | Method of recycling metallic coated scrap pieces A method of recycling metallic coated scrap pieces wherein the coating layer liquidus temperature is lower than the core layer solidus temperature, such as brazing sheet scrap pieces, or metallic coated scrap pieces wherein the upper part of the melting range of the... | 05/15/2007 |
| 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 |
| 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 |
| 6811589 | Method for adding solid zinc-aluminum to galvanizing baths The process of the present invention is directed to a method for making zinc or zinc-aluminum alloy additions to galvanizing baths. The process involves addition of a wire of zinc or zinc-aluminum alloy introduced directly into a molten galvanizing bath to more rapi... | 11/02/2004 |
| 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 |
| 6113670 | Twin chamber combustion furnace Refractory lined metal melting furnace for the melting and holding a plurality molten metals or alloys of different composition comprises a melting chamber, a plurality of passages communicating the melting chamber to a plurality of refractory lined, heat... | 09/05/2000 |
| 6036745 | Molten metal charge well In a charge well for adding scrap metal pieces or particles to a molten metal bath, a stationary diverter is provided within a charge well for diverting the circular flow of molten metal, caused by the orientation of the inlet port, in a downward directio... | 03/14/2000 |
| 5984999 | Apparatus having gas-actuated pump and charge well and method of melting metal therewith charge a well of a metal-melting furnace The charge well of a metal melting furnace is provided with an internal cavity having a circular cross section when viewed from the top, preferably a cavity of cylindrical or conical configuration, and with a peripheral exit port located tangentially with... | 11/16/1999 |
| 5961689 | Method of protective atmosphere heating A method for heating and/or melting a charge such as aluminum in a furnace using heat generated by combustion to radiatively heat the charge through a layer of protective gas wherein combustion reaction products generated by the combustion are exhausted f... | 10/05/1999 |
| 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 |
| 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 |
| 5573574 | Electrorefined aluminium with a low content of uranium, thorium and rare earths A process for obtaining aluminum of purity above 99.998%. A liquid aluminum raw material is subjected to a fractional crystallization to obtain prepurified aluminum crystals in a yield of between 50 and 80% and a liquid aluminum portion of lesser purity. ... | 11/12/1996 |
| 5518524 | Method of reducing emissions from a metal melting furnace A vertical shaft furnace for melting non-ferrous metals, such as copper, aluminum, and their alloys, includes metal blocks disposed in an annular wall just beneath the charging section of the furnace. Preheated air is forced into the furnace shaft through... | 05/21/1996 |
| 5500033 | Melt heating method A method of heating a melt containing an oxidizable substance in which a fuel is burned with an oxidant by projecting fuel oxidant jets over the melt. The fuel and the oxidant jets have a fuel jet momentum and an oxidant jet momentum, respectively. The ox... | 03/19/1996 |
| 5494499 | Crucible and method for its use A crucible particularly intended for use when vaporizing aluminum and comprised of an ultralow cement compound. Subsequent to moulding and drying the crucible, the crucible is baked at a high temperature, which corresponds to the temperature of the crucib... | 02/27/1996 |
| 5421856 | Process to reduce dross in molten aluminum Dross formation in the aluminum melting and/or refining is avoided partially or totally by the method of this invention. The method is useful in unmodified open top furnaces. The elimination or reduction of dross formation is carried out throughout the bo... | 06/06/1995 |
| 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 |
| 5320803 | Process for making aluminum-lithium alloys of high toughness The toughness of Al-Li, Al-Mg and Mg-Li alloys is increased by a melting and refining process designed to reduce the concentration of alkali metal impurities below specified levels. The hydrogen and chlorine gas constituents are also significantly reduced... | 06/14/1994 |
| 5211744 | Method and means for improving molten metal furnace charging efficiency Utilization of metal chips, especially scrap metal chips, particularly brass and aluminum, by introduction of the metal chips into a pool of molten metal of which they are formed or an alloy thereof, with minimization of fuel cost, heat loss, and minimal ... | 05/18/1993 |
| 5167918 | Manufacturing method for aluminum-lithium alloy A manufacturing method for the production of aluminum-lithium alloys at low cost is disclosed which includes enclosing lithium with aluminum by means of a cold extrusion of pure lithium and melting the aluminum-sealed lithium ingots in an ambient atmosphe... | 12/01/1992 |
| 5091149 | Manufacturing method of aluminum-lithium alloy by atmospheric melting A manufacturing method of aluminum-lithium alloy by atmospheric melting in which oxidation of lithium is minimized through improvement of degassing system under normal atmospheric melting method without using separate hermetically sealing device for isola... | 02/25/1992 |
| 5085830 | Process for making aluminum-lithium alloys of high toughness The toughness of Al-Li, Al-Mg and Mg-Li alloys is increased by a melting and refining process designed to reduce the concentration of alkali metal impurities below about 1 ppm and preferably below about 0.1 ppm. The hydrogen and chlorine gas constituents ... | 02/04/1992 |
| 5032173 | Aluminum furnace charging system and process of changing An aluminum furnace charging system including a movable charger assembly, a hydraulically operated ram assembly, a hydraulically operated elevator and aluminum furnace having a hydraulically operated door whereby aluminum billets and/or scrap aluminum loa... | 07/16/1991 |
| 5015288 | Gas-fired aluminum melter having recirculating molten salt bath and process A method and apparatus are provided for combusting a gaseous fuel in molten salt to generate a heated recirculating salt bath for melting aluminum. Combustion products are prevented from directly contacting aluminum. Gaseous fuel is introduced into a cham... | 05/14/1991 |
| 4664702 | Method of melting aluminum in a vertical shaft furnace A method of efficiently melting aluminum and aluminum alloys in a vertical shaft furnace substantially completely by convection is disclosed. The vertical shaft furnace has a generally cylindrical cross-section with a refractory liner and a cast refractor... | 05/12/1987 |
| 4636355 | Method for manufacture of highly ductile material A method for the manufacture of a highly ductile material comprises melting an alloy material in a crucible held under a vacuum, inserting a stirring bar in the molten alloy material in the crucible and rotating the stirring bar at a low speed, causing th... | 01/13/1987 |
| 4581063 | Method and apparatus for melting metal ingots A method and an apparatus for melting a metallic material in the form of a pile of elongate metal ingots, wherein the ingot pile are pre-heated in a horizontal pre-heating chamber while the pile is moved from its one end to the other end, and the pre-heat... | 04/08/1986 |
| 4484947 | Method for melting a charge of bulk solid metal A method and system of melting a charge of metal in a closed hearth wherein the metal has a first high thermal conductivity when solid, a second low thermal conductivity when liquid and a given melting temperature below about 1600° F., such as aluminum. ... | 11/27/1984 |
| 4466827 | Method for melting metals Metal is melted in melting vessels heated in a melting furnace by combustion of fuel and by exhaust gases from the combustion. In order to prevent evaporation, overheating and contamination of the melt, the exhaust gases of the melting furnace, including ... | 08/21/1984 |
| 4432791 | Ceramic radiant tube heated aluminum melter and method of melting aluminium Disclosed are a method and apparatus for clean, low loss melting of aluminum using heat transfer by convection and radiation in separate stages. Heat input to a melter stage is provided by silicon carbide tubes into which gas-fueled burners fire so that t... | 02/21/1984 |
| 4355789 | Gas pump for stirring molten metal This invention proposes a gas pump for use in metallurgical industry. The gas pump for stirring a molten metal (1) in a melting chamber (2) comprises a refractory-lined pipe (3) with a removable cover (5) formed with an opening (6) adapted to communicate an in... | 10/26/1982 |
| 4353532 | Aluminum melting furnace An aluminum melting furnace apparatus of compact, thermally efficient configuration utilizing a silicon carbide plate member for covering the lower end of the combustion chamber which receives heat from a flat flame burner for uniformly heating the plate ... | 10/12/1982 |
| 3935003 | Process for melting metal This invention relates to an improved method of melting metal, particularly reactive metals, such as aluminum, wherein heated molten metal is withdrawn from a first chamber and a portion of the withdrawn molten metal is transferred to a second chamber con... | 01/27/1976 |
