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| Number | Title | Issue Date |
| 7896945 | Carbothermic processes A mass of solid aluminium carbide containing product is produced by injecting particulate alumina into a bath (30) of molten aluminium metal; and injecting carbonaceous material, consisting of, containing or yielding carbon, into the bath (30). The bat... | 03/01/2011 |
| 6849101 | Method using selected carbons to react with Al2O and Al vapors in the carbothermic production of aluminum In a method for recovering Al from an off-gas (3,4) produced during carbothermic reduction of aluminum utilizing at least one smelter (1,2), the off-gas (3,4) is directed to an enclosed reactor (5) which is fed a supply of wood charcoal (... | 02/01/2005 |
| 6827759 | Method for reducing the oxygen and oxide content in cobalt to produce cobalt sputtering targets The present invention relates to producing cobalt having a low oxygen and a low oxide inclusion content for use as a sputter target thereby reducing the arcing and metal defects during sputtering commonly associated with high-oxygen cobalt sputter targets. Notably, ... | 12/07/2004 |
| 6805723 | Method and reactor for production of aluminum by carbothermic reduction of alumina A hollow partition wall is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall divides a low temperature reaction zone where aluminum oxide is reacted with carbon to form aluminum carbide and... | 10/19/2004 |
| 6530970 | Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina A method for aluminum recovery during the carbothermic production of aluminum in a smelting furnace (1,2) is disclosed, where during carbothermic reduction of alumina, aluminum and aluminum suboxide vapors are produced (3, 4), which are reacting with carb... | 03/11/2003 |
| 6475260 | Carbothermic aluminum production using scrap aluminum as a coolant A process for producing aluminum metal by carbothermic reduction of alumina ore. Alumina ore is heated in the presence of carbon at an elevated temperature to produce an aluminum metal body contaminated with about 10-30% by wt. aluminum carbide. Aluminum ... | 11/05/2002 |
| 6440193 | Method and reactor for production of aluminum by carbothermic reduction of alumina The present invention relates to a process for carbothermic production of aluminum where molten bath aluminum carbide and aluminum oxide are produced in a low temperature compartment (2), and continuously flow into a high temperature compartment (3) where... | 08/27/2002 |
| 6361580 | Method for production of aluminum A continuous process for the production of elemental aluminum is described. Aluminum is made from aluminum oxide and a reducing gas such as a light hydrocarbon gas or other reducing gas, for example hydrogen. In the process, a feed stream of the aluminum ... | 03/26/2002 |
| 6086655 | Production of metal such as aluminum, magnesium, silicon from metal oxide compounds A thermo-mechanical process for producing aluminum or other metals from aluminium or metal compounds, is described, whereby aluminum oxide or similar aluminium compounds or similar other metal compounds, are heated by friction generated by mechanical forc... | 07/11/2000 |
| 5316565 | Carbothermic reduction product gas treatment Method and apparatus for reducing the quantity of carbon dioxide emitted to the atmosphere from carbothermic processes producing metals are described. The method involves rejecting carbon from the process system or using carbon as a reagent to be recycled... | 05/31/1994 |
| 5286274 | Method for treatment of potlining residue from primary aluminium smelters This is a method for treatment of spent potlining from aluminium reduction cells including the refractory material in order to transfer the spent potlining to a form in which it can be used as a filler or as a raw material. The spent potlining is crushed ... | 02/15/1994 |
| 4812168 | Process for carbothermic production of alkaline earth metal aluminide and recovery of same 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... | 03/14/1989 |
| 4770696 | Process for carbothermic production of calcium aluminide using calcium carbide 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... | 09/13/1988 |
| 4769068 | Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with sulfurous 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 |
| 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 |
| 4769067 | Process for production of aluminum by carbothermic production of an alkaline earth metal aluminide such as calcium aluminide and recycling of reactant byproducts 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 |
| 4765832 | Process for carbothermic production of calcium aluminide using slag containing calcium aluminate 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... | 08/23/1988 |
| 4765831 | Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen 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... | 08/23/1988 |
| 4735654 | Process for reduction of metal compounds by reaction with alkaline earth metal aluminide 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... | 04/05/1988 |
| 4734130 | Method of producing rapidly solidified aluminum-transition metal-silicon alloys The present invention provides a method for producing an aluminum alloy which includes the step of carbothermically reducing an aluminous material to provide an alloy consisting essentially of the formula Albal TMd Sie, wh... | 03/29/1988 |
| 4681626 | Method of refining aluminum The present invention provides a method of refining aluminum, according to which oxygen gas is blown into a carbon material filled in a blast furnace to form simultaneously both combustion regions where combustion of the carbon material takes place and hi... | 07/21/1987 |
| 4536212 | Production of a purified aluminum monochloride from alumina, bauxites and clays and the subsequent production of aluminum metal In the production of aluminum monochloride from alumina, bauxites, bauxitic clays and clays wherein the produced aluminum monochloride gas stream contains at least CO2 and Cl2 radical and this gas stream is initially passed through a... | 08/20/1985 |
| 4533386 | Process for producing aluminum A carbothermic reduction process for extracting commercially pure aluminum from sources of alumina containing substantial amounts of compounds of elements in the group comprising iron, silicon and titanium is disclosed. The method involves selective reduc... | 08/06/1985 |
| 4491472 | Carbothermic reduction and prereduced charge for producing aluminum-silicon alloys Disclosed is a method for the carbothermic reduction of aluminum oxide to form an aluminum alloy including producing silicon carbide by heating a first mix of carbon and silicon oxide in a combustion reactor to an elevated temperature sufficient to produc... | 01/01/1985 |
| 4445934 | Method of manufacturing aluminum by using blast furnace This invention provides a method of smelting aluminum by using a blast furnace. An oxygen gas is introduced into a carbon material packed in a reactor, to burn the same to form a plurality of raceways and a high-temperature reduction region among the race... | 05/01/1984 |
| 4430120 | Process for the manufacture of pure metallic aluminum from aluminum ores and other aluminum-bearing materials The present invention relates to a process for the manufacture of aluminum metal from aluminum ores, clays ashes, bauxites or wasted effluents containing aluminum. The process involves the following steps: (a) a homogeneous mixing of the aluminum-bearing ... | 02/07/1984 |
| 4419126 | Aluminum purification system A method for extracting aluminum of substantial purity from furnace products resulting from carbothermic reduction of alumina-bearing ores and contaminated with up to about 30 weight percent of aluminum carbide is disclosed. The method involves contacting... | 12/06/1983 |
| 4394167 | Method of carbothermically producing aluminum A method of producing an aluminum metal from alumina, silica and iron oxide bearing materials by mixing the coal and bringing the mixtures to the temperature in the range of 600° to 900° C. in order to make the alumina bearing coked briquettes. Then, th... | 07/19/1983 |
| 4388107 | Minimum-energy process for carbothermic reduction of alumina Alumina is carbothermically and cyclically reacted with carbon and recycled materials within a reduction zone to produce a slag layer, an overlying aluminum metal layer, and vaporization products which are passed through a vapor-permeable back-reaction zo... | 06/14/1983 |
| 4324585 | Process for manufacture of aluminum The invention is a multistep process for the production of metallic aluminum. An aluminum containing ore such as bauxite, alumina, and clay is reacted with a carbon containing material, oxygen and bromine at an elevated temperature to produce aluminum bro... | 04/13/1982 |
| 4299619 | Energy efficient production of aluminum by carbothermic reduction of alumina A method for production of aluminum by carbothermic reduction of Al2 O3 in a stack-type reactor. A charge of Al2 O3 and C is inserted into an upper reaction zone of the reactor and reacted at an elevated tempera... | 11/10/1981 |
| 4265716 | Method of winning aluminum metal from aluminous ore Aluminous ore such as bauxite containing alumina is blended with coke or other suitable form of carbon and reacted with sulfur gas at an elevated temperature. For handling, the ore and coke can be extruded into conveniently sized pellets. The reaction wit... | 05/05/1981 |
| 4261736 | Carbothermic production of aluminium In a process for the treatment of fume-laden carbon monoxide evolved in carbothermic reduction of alumina the fume-laden gas is contacted with particulate carbon in a fluidized bed maintained at a temperature, preferably in the range 2010°-2050° C. and ... | 04/14/1981 |
| 4226618 | Carbothermic production of aluminium In a process for production of aluminium metal carbon monoxide gas evolved at very high temperature through reaction of aluminium carbide and alumina is cooled by contact with a molten alumina slag at a lower temperature to cause back reaction of containe... | 10/07/1980 |
| 4224054 | Process for the production of aluminium A process for the production of aluminium in two steps: and Reaction (ii) takes place in a materials addition chamber and reaction (iii) in a high temperature chamber. Slag is circulated between the chambers via conduits and is promoted by gas supplied from a... | 09/23/1980 |
| 4224059 | Carbothermic production of aluminium In a process for production of aluminium metal described in U.S. Pat. No. 4,099,959 carbon monoxide gas is evolved at very high temperature through reaction of aluminium carbide and alumina in a high temperature zone of the system. This gas is cooled by c... | 09/23/1980 |
| 4216010 | Aluminum purification system A method for extracting aluminum of substantial purity from furnace products resulting from carbothermic reduction of alumina-bearing ores and contaminated with up to about 30 weight percent of aluminum carbide is disclosed. The method involves contacting... | 08/05/1980 |
| 4053303 | Method of carbothermically producing aluminum-silicon alloys Aluminum-silicon alloys are formed by bringing a mix containing sources of alumina, silica and carbon to a temperature in the range of 1500° and 1600° C to form silicon carbide and carbon monoxide. The mix containing the silicon carbide is then brought ... | 10/11/1977 |
| 4049425 | Process for the manufacture of aluminum An improved process for the manufacture of aluminum by reducing aluminum/oxygen compounds with carbon at high temperatures is described.... | 09/20/1977 |
| 4046558 | Method for the production of aluminum-silicon alloys A method of producing an aluminum-silicon type alloy from alumina-silica bearing materials comprises providing the silica and alumina bearing materials in a mix having a weight ratio of silica to alumina in the range of 0.5 to 1.1. The method further comp... | 09/06/1977 |
