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| Number | Title | Issue Date |
| 6316125 | Aluminum welding process and composition for use in same The invention provides a new and improved process and exothermic reaction mixture for producing molten weld metal. The molten weld metal is used in joining one metallic piece with at least one other metallic piece. The process and exothermic reaction mixt... | 11/13/2001 |
| 6139658 | Metal matrix alloys The invention provides a method of making a titanium carbide metal matrix alloy, by firing a particulate reaction mixture comprising carbon, titanium and matrix material, under conditions such that the titanium and carbon react exothermically to form a di... | 10/31/2000 |
| 5865872 | Method of recovering metals and producing a secondary slag from base metal smelter slag A method of recovering metals and producing a secondary slag from base metal smelter slag produced by a copper or nickel smelter includes mixing the smelter slag with at least one reducing agent selected from the group consisting of carbon, calcium carbid... | 02/02/1999 |
| 5753006 | Method for the aluminothermal production of molten steel Disclosed is a method for the aluminothermal production of molten steel for the aluminothermal welding of workpieces, wherein the aluminothermal reaction is carried out in a crucible made of porous or hollow spherical -Al2 O3 ... | 05/19/1998 |
| 5565387 | Electrical heating element, related composites, and composition and method for producing such products using dieless micropyretic synthesis Electrical heating elements and related articles having oxidation resistance at high temperatures, produced by a method involving micropyretic synthesis. A composition subjected to micropyretic synthesis comprises a filler material, a reactive system capa... | 10/15/1996 |
| 5528012 | Apparatus and method for starting a plasma arc treatment system An ignitable material is positioned in contact with a slag contained within a plasma arc treatment system having an electrode and an electrical ground. The slag is initially at a temperature below a conducting temperature at which the slag will conduct el... | 06/18/1996 |
| 5496392 | Method of recycling industrial waste The present invention relates to a process for the production of metal alloys, metal oxides and slag-based products, such as mineral wool, from industrial waste materials. More specifically, the present invention relates to a process for recycling industr... | 03/05/1996 |
| 5422069 | Master alloys for beta 21S titanium-based alloys and method of making same Master alloys and methods of producing same are disclosed, wherein an intermetallic compound, for example Al3 Cb is first prepared via thermite processing, then size reduced, then mixed with other components in amounts yielding a mixture in the... | 06/06/1995 |
| 5279643 | Process for recovering valuable metals from an iron dust A process for recovering valuable metals from an iron dust using a shaft furnace is disclosed. The iron dust is agglomerated and supplied into a the shaft furnace together with a lump coke and a flux. Valuable metal oxides contained in the iron dust are r... | 01/18/1994 |
| 5199973 | Method of disposing of medical sharps A method of successfully disposing of, or recycling, waste metals comprising placing the waste metals in an aluminum container, placing the container in a crucible containing a mixture of powdered aluminum and iron oxide, initiating a self-sustaining reac... | 04/06/1993 |
| 5171378 | Aluminum welding process and mixture of reactants for use in such process The invention provides a method and means of producing weld metal for use in joining two or more aluminum containing pieces. The method includes the steps of providing a novel mixture of reactants comprising silicon, a reducing agent, a metallic compound ... | 12/15/1992 |
| 5152830 | Thermite process for producing a metal or alloy A thermite process for producing a pure metal or alloy by charging a reactor furnace with a mixture primarily containing a powdered metallic oxide and a reducing agent such as powdered aluminum, wherein a batch of the mixture of the starting materials is ... | 10/06/1992 |
| 5092921 | Method for producing high-purity metallic chromium High-purity metallic chromium is produced by a method of initially preparing a mixture of chromium oxide, aluminum, carbon and an easily sulfidable metallic powder, and subsequently providing a thermite-reaction with the mixture to produce thermite-crude ... | 03/03/1992 |
| 5062903 | Welding process and mixture of reactants for use in such process The invention provides a method and means of producing weld metal for use in joining two or more metallic pieces. The method includes the steps of providing a novel mixture of reactants comprising a reducing agent, a metallic compound which is exothermica... | 11/05/1991 |
| 5037608 | Method for making a light metal-rare earth metal alloy A method for making a light metal-rare earth metal alloy comprises adding a pellet to a bath of molten light metal, said pellet consisting essentially of a mixture of light metal powder and rare earth metal-containing compound. Such pellets, which are mad... | 08/06/1991 |
| 5002730 | Preparation of vanadium rich hydrogen storage alloy materials Disclosed is a method of forming a vanadium-rich, multi-component reversible, electrochemical hydrogen storage alloy directly from a vanadium-reductant alloy without first obtaining pure vanadium. In one exemplification the vanadium-reductant alloy is a v... | 03/26/1991 |
| 4921531 | Process for forming fine ceramic powders The present invention relates to a process for the production of fine powder materials and the products of that process. The process involves the in-situ precipitation of second phase particles, such as ceramic or intermetalics, within a metal matrix, fol... | 05/01/1990 |
| 4917726 | Chromium recovery process Waste materials containing chromium, such as the sludge resulting from neutralization of chromic acid bleed streams from metal cleaning and plating operations, are (1) rendered innocuous for land fill purposes by heating to temperatures of at least about ... | 04/17/1990 |
| 4612047 | Preparations of rare earth-iron alloys by thermite reduction An improved method for the preparation of high-purity rare earth-iron alloys by the aluminothermic reduction of a mixture of rare earth and iron fluorides.... | 09/16/1986 |
| 4504310 | Process for the production of high purity metals or alloys A process for the production of high purity metals or metallic alloys comprises the steps of: (a) producing a metal or metallic alloy, the non-metallic inclusions of which are, preferably, easily reducible oxides of the base metal; (b) milling the metal or met... | 03/12/1985 |
| 4331475 | Process for aluminothermic production of chromium and chromium alloys low in nitrogen A process is provided for the aluminothermic production of low nitrogen containing chromium and chromium alloys, said chromium alloys comprising about 80% chromium, about 20% nickel and less than 0.005% nitrogen, said alloys being especially desirable for... | 05/25/1982 |
| 4099959 | Process for the production of aluminium In a process for the production of aluminium a molten alumina slag, containing combined carbon is circulated through one or more alternately arranged relatively low temperature zones where carbon is added to increase the combined carbon content of the sla... | 07/11/1978 |
| 4047942 | Thermite smelting of ferromolybdenum A process for producing ferromolybdenum alloys by thermite smelting of a particulated reaction mixture composed of a molybdenum oxide concentrate, an iron bearing material, a reductant and a slag fluxing agent present in controlled proportions. The reacti... | 09/13/1977 |
| 3942976 | Metal recovery process A process is disclosed for recovering metals from sulfide or oxide containing ores or mixtures or concentrates thereof in which a mass of ore and metallic aluminum is ignited and sintered at a temperature within the range of approximately 1000° to about ... | 03/09/1976 |
