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| Number | Title | Issue Date |
| 7749363 | Aluminium electrowinning cell design with movable insulating cover sections A cell for the electrowinning of aluminium by the electrolysis from an aluminium compound dissolved in a molten electrolyte (50), comprises: (I) a plurality of non-carbon anodes (10), each anode being suspended in operating in the molten electrolyte by... | 07/06/2010 |
| 7699963 | Internal cooling of electrolytic smelting cell An electrolytic cell for the production of metal by electrolytic reduction of a metal bearing material dissolved in a molten salt bath, the cell including a shell, and a lining on the interior of the shell, the lining including a bottom cathode lining and a side wal... | 04/20/2010 |
| 7527715 | Method and system for cooling an electrolytic cell for aluminum production The invention relates to a cooling method of a igneous electrolytic cell for aluminium production wherein heat transfer fluid droplets (or “divided heat transfer fluid”) are produced, preferentially in a confined volume in contact with a specified surface of at ... | 05/05/2009 |
| 7192508 | Devices to conduct current to or from the electrodes in electrolysis cells, methods for preparation thereof, and an electrolysis cell and a method for production of aluminum by electrolysis of alumina solved in a melted electrolyte Device (1) to conduct current to or from the electrodes of an electrolysis cell, which device in the direction towards the electrolysis cell comprises three types of segments; at least one outer segment (2) joined with at least one intermediate segment... | 03/20/2007 |
| 6783656 | Low temperature operating cell for the electrowinning of aluminium A cell for the electrowinning of aluminum using anodes (10) made from a alloy of iron with nickel and/or cobalt is arranged to produce aluminum of low contamination and of commercial high grade quality. The cell comprises a cathode (20) of drained conf... | 08/31/2004 |
| 6692620 | Aluminium electrowinning cell with sidewalls resistant to molten electrolyte A drained cathode cell for the electrowinning of aluminium comprises a cell bottom (20) arranged to collect product aluminium and thermic insulating sidewalls (55,55') lined with a molten electrolyte resistant sidewall lining (50) which is made of materia... | 02/17/2004 |
| 6638412 | Prevention of dissolution of metal-based aluminium production anodes A method of inhibiting dissolution of a transition metal alloy anode (40) of an aluminium electrowinning cell comprises providing a sodium-inert layer (11,20,50,50') on a sodium-active cathodic cell material (15), such as carbon, and electrolysing alumina... | 10/28/2003 |
| 6558525 | Anode for use in aluminum producing electrolytic cell A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte, the method comprising the steps of providing a molten salt electrolyte at a temperature of less than 900° C. having alumina dissolved therein in an ele... | 05/06/2003 |
| 6540887 | Aluminum electrowinning cells with oxygen-evolving anodes A cell for the electrowinning of aluminium comprises at least one non-carbon metal-based anode (10) having an electrically conductive metallic structure (12, 13, 15) which is suspended substantially parallel to a facing cathode (20, 21, 22). Such metallic... | 04/01/2003 |
| 6537438 | Method for protecting electrodes during electrolysis cell start-up The present invention is directed to methods for applying a protective layer (42) to the cathode (40) of an electrolysis cell (10), where the cell also contains inert anodes (50) and the protective layer (42) can comprise a plurality of layers (70, 72, 74... | 03/25/2003 |
| 6533909 | Bipolar cell for the production of aluminium with carbon cathodes A bipolar cell for the electrowinning of aluminium has bipolar electrodes each comprising a carbon cathode body having on one side an active surface on which aluminium is produced and connected on the other side through an oxygen impermeable barrier layer... | 03/18/2003 |
| 6475358 | Method for providing a protective coating for carbonaceous components of an electrolysis cell A method of treating a carbonaceous cell component of an electrolyte cell for the production of aluminum, to impart protection against deterioration during operation of the cell. A liquid suspension of a refractory material dispersed in a lignosulfonate b... | 11/05/2002 |
| 6436250 | Slurry and method for producing refractory boride bodies and coatings for aluminium electrowinning cell apparatus A refractory boride body or coating made of a boride of titanium, chromium, vanadium, ziconium, hafnium, niobium, tantalum, molybednum and cerium is produced from a slurry of the refractory boride or a precursor in a collidal carrier preferably composed o... | 08/20/2002 |
| 6436272 | Low temperature aluminum reduction cell using hollow cathode A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte. A plurality of non-consumable anodes are disposed substantially vertically in the electrolyte along with a plurality of monolithic hollow cathodes. Each... | 08/20/2002 |
| 6358393 | Aluminum production cell and cathode A cell for the production of aluminium by the electrolysis of an aluminium compound dissolved in a molten electrolyte, in which an outer mechanical structure forming an outer shell (21) houses therein one or more inner electrically-conductive cathode hold... | 03/19/2002 |
| 6258246 | Aluminium electrowinning cell with sidewalls resistant to molten electrolyte A drained cathode cell for the electrowinning of aluminium comprises a cell bottom (20) arranged to collect product aluminium and thermic insulating sidewalls (40) lined with a molten electrolyte resistant sidewall lining (50), in particular containing si... | 07/10/2001 |
| 6251237 | Electrolytic pot for production of aluminum using the Hall-Heroult process comprising cooling means An electrolytic pot for the production of aluminum by the Hall-Heroult electrolysis process includes a cooling device for blowing air with localized jets, advantageously with variable flow, in order to evacuate and dissipate thermal energy from the pot. A... | 06/26/2001 |
| 6245201 | Aluminum smelting pot-cell The aluminum smelting from alumina in the Hall-Heroult cells can be dramatically improved by using one or a combination of the following features together or in alternative to the Bayer alumina as feedstock: Al+++ alumina, sawtooth shaped elect... | 06/12/2001 |
| 6139704 | Application of refractory borides to protect carbon-containing components of aluminum production cells Carbon-containing components of cells for the production of aluminium by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte are protected from attack by liquid and/or gaseous components of the electrolyte in the form of elements,... | 10/31/2000 |
| 6103091 | Production of bodies of refractory borides for use in aluminum electrowinning cells A method of producing a self-sustaining body of refractory boride from the group consisting of the borides of titanium, chromium, vanadium, zirconium, hafnium, niobium, tantalum, molybdenum and cerium. This body includes a refractory boride and a dried co... | 08/15/2000 |
| 5961811 | Potlining to enhance cell performance in aluminum production Disclosed is an improved carbonaceous material suitable for use as a cathode in an aluminum producing electrolytic cell, the cell using an electrolyte comprised of sodium containing compounds. The carbonaceous material is comprised of carbon and a reactiv... | 10/05/1999 |
| 5851677 | Coating composition for carbon-containing products and said coating Composition for a coating protecting the surfaces of carbon-containing products exposed to a hot, oxidizing environment such as the parts of anodes not immersed in the molten salt bath and the liners of the aluminum electrolysis cells and more generally t... | 12/22/1998 |
| 5679224 | Treated carbon or carbon-based cathodic components of aluminum production cells Carbon or carbon-based cathodes and cell bottoms of electrolytic cells for the production of aluminium in particular by the electrolysis of alumina in a molten halide electrolyte such as cryolite, are treated to better resist intercalation of sodium in th... | 10/21/1997 |
| 5578174 | Conditioning of cell components for aluminum production Components of electrolytic cells for the production of aluminum in particular by the electrolysis of alumina in a molten fluoride electrolyte, made of carbon or other microporous material which remains stable or may be consumed in the cell operating condi... | 11/26/1996 |
| 5538604 | Suppression of cyanide formation in electrolytic cell lining Disclosed is an improved carbonaceous material suitable for use as a liner in an aluminum producing electrolytic cell, the cell using an electrolyte comprised of sodium containing compounds and the carbonaceous material penetrable by sodium or nitrogen an... | 07/23/1996 |
| 5507933 | Carbon masses for use in aluminium production cells and process A cell component for use in particular as anodes, cathodes and cell linings of cells for the electrolysis of alumina for the production of aluminum, comprising a solidified carbon containing paste consisting essentially of a compact mixture of one or more... | 04/16/1996 |
| 5429722 | Magnesium electrolysis cell, lining therefor, and method A magnesium electrolysis cell having a refractory lining comprising at least one glass-ceramic shape, the lining itself, and the method of increasing the service life of the refractory lining of a magnesium electrolysis cell comprising using a plurality o... | 07/04/1995 |
| 5413689 | Carbon containing body or mass useful as cell component A carbon containing paste for use in particular as components of electrolytic cells as such or compacted to form anodes, cathodes and cell linings of cells for the electrolysis of alumina for the production of aluminium, consists of a compact mixture of o... | 05/09/1995 |
| 5378338 | Superstructure for a very high power electrolysis cell for the production of aluminum Superstructure for a very high power electrolysis cell for the production of aluminum using the Hall-Heroult process. The cell being formed of a heat-insulated metal casing of elongated parallelepipedic shape. The said superstructure comprising at least o... | 01/03/1995 |
| 5374342 | Production of carbon-based composite materials as components of aluminium production cells A method of producing a component of an aluminium production cell made of a carbon-based composite material containing a refractory hard metal boride, carbide, oxide, nitride or combinations or mixtures thereof and aluminium as metal, alloy or as an alumi... | 12/20/1994 |
| 5336378 | Method and apparatus for producing a high-purity titanium A sputtering target for forming a thin film consisting of high-purity titanium, in which the content of alkali metal is 0.1 ppm or less, the content of radio active elements is 1 ppb or less, and the oxygen content is 100 ppm or less, and, further, the ba... | 08/09/1994 |
| 5314599 | Barrier layer against fluoride diffusion in linings of aluminum reduction cells A barrier layer for prevention of solid fluorides penetration, e.g. NaF, from the interior of an aluminum production cell holding a fluoride-containing melt into a refractory layer intended to provide heat and electrical insulation for the cell. The barri... | 05/24/1994 |
| 5286353 | Electrolysis cell and method for the extraction of aluminum The present invention relates to a new electrolysis cell for the fusion electrolytic extraction of aluminum wherein the anode blocks are connected to one another using a compressed granulate packing. The invention also relates to a novel electrolytic cell... | 02/15/1994 |
| 5284562 | Non-consumable anode and lining for aluminum electrolytic reduction cell An oxidation resistant, non-consumable anode, for use in the electrolytic reduction of alumina to aluminum, has a composition comprising copper, nickel and iron. The anode is part of an electrolytic reduction cell comprising a vessel having an interior li... | 02/08/1994 |
| 5279715 | Process and apparatus for low temperature electrolysis of oxides A process for electrowinning metal in a low temperature melt is disclosed. The process utilizes an inert anode for the production of metal such as aluminum using low surface area anodes at high current densities.... | 01/18/1994 |
| 5254232 | Apparatus for the electrolytic production of metals Improved electrolytic cells for producing metals by the electrolytic reduction of a compound dissolved in a molten electrolyte are disclosed. In the improved cells, at least one electrode includes a protective layer comprising an oxide of the cell product... | 10/19/1993 |
| 5225051 | Electrowinning process with electrode compartment to avoid contamination of electrolyte An electrolytic process and apparatus for reducing calcium oxide in a molten electrolyte of CaCl2 -CaF2 with a graphite anode in which particles or other contamination from the anode is restricted by the use of a porous barrier in th... | 07/06/1993 |
| 5203971 | Composite cell bottom for aluminum electrowinning A cell for the electrowinning of aluminum from molten salts has a cell bottom lining consisting partly of a refractory mass (4 ) and partly of carbon bodies (5). At least 30% and preferably 50% or more of the cell bottom area is occupied by the refractory... | 04/20/1993 |
| 5167787 | Linings for aluminum reduction cells The amount of electrically conductive material in the bottom floor lining of a conventional aluminum reduction cell is reduced by using a non-conductive lining material in its place. The non-conductive material separates the remaining electrically conduct... | 12/01/1992 |
| 5149412 | Electrolysis cell and refractory material therefor Aluminum electrolysis cell having a refractory lining, said lining being produced by calcining red mud obtained as a byproduct of the Bayer process of producing alumina, grinding the calcined product to form particles of -4 Tyler mesh, mixing the ground p... | 09/22/1992 |
