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| Number | Title | Issue Date |
| 7462271 | Stabilizers for titanium diboride-containing cathode structures A method is described for making aluminum reduction cell components, e.g. cathodes having stabilized surfaces, which comprises mixing together a carbonaceous material, TiB2 and up to 25% by weight of a finely divided additive consisting of a combination o... | 12/09/2008 |
| 7425284 | Inert anode for the production of aluminium by fused bath electrolysis and method of making this anode The purpose of the invention is a process for making a solid part designed to form all or part of an anode for the production of aluminium by fused bath electrolysis, containing a cermet formed from at least one metallic oxide such as a mixed oxide with spinel struc... | 09/16/2008 |
| 7282133 | Cermet inert anode assembly heat radiation shield A method of protecting an inert anode assembly (16) operating in an electrolysis cell (10) for producing metal when an adjacent assembly (16′) is removed exposing remaining assemblies to low ambient temperatures (40) by utilizing heat r... | 10/16/2007 |
| 7186357 | High swelling ramming paste for aluminum electrolysis cell A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode... | 03/06/2007 |
| 7141149 | Electrodes useful for molten salt electrolysis of aluminum oxide to aluminum The present invention provides a method of making a carbon electrode, suitable for use as an anode in an aluminum reduction cell, which comprises mixing an aggregate, comprising a mixture of particulate shot coke, and a particulate carbonaceous material other than s... | 11/28/2006 |
| 7118666 | Protecting an inert anode from thermal shock A method for protecting anode assemblies in an electrolytic cell from thermal shock is disclosed. The method generally involves applying a thermal insulating layer (8, 16) to the anode (2) prior to preheating the anode assembly in a furnace, where the ... | 10/10/2006 |
| 6866768 | Electrolytic cell for production of aluminum from alumina Electrolysis of alumina dissolved in a molten salt electrolyte employing inert anode and cathodes, the anode having a box shape with slots for the cathodes. ... | 03/15/2005 |
| 6855234 | Sinter-bonded direct pin connections for inert anodes A sintered electrode assembly is made of an inert electrode (15) containing a sealed metal conductor (20) having a surface feature (30) such as a coating or wrapping which aids in bond formation with the inert electrode (15) at their inte... | 02/15/2005 |
| 6811676 | Electrolytic cell for production of aluminum from alumina An electrolytic cell for producing aluminum from alumina having a reservoir for collecting molten aluminum remote from the electrolysis. ... | 11/02/2004 |
| 6723212 | Impregnated graphite cathode for the electrolysis of aluminium This cathode (3) contains, within the pores in its structure, a carbon-containing product fired at a temperature of less than 1600° C., improving the erosion resistance by protecting the graphitized binder. ... | 04/20/2004 |
| 6719890 | Cathode for a hall-heroult type electrolytic cell for producing aluminum A method of producing aluminum from alumina in an electrolytic cell including using a cathode comprised of a base material having low electrical conductivity and wettable with molten aluminum to form a reaction layer having a high electrical conductivity on said bas... | 04/13/2004 |
| 6649040 | Wettable and erosion/oxidation-resistant carbon-composite materials A thermal treatment system for thermally treating a sterile medium is controlled via a foot actuated switch to thermally treat the sterile medium to a desired temperature and/or form (e.g., slush). The thermal treatment system includes a basin recessed in... | 11/18/2003 |
| 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 |
| 6616829 | Carbonaceous cathode with enhanced wettability for aluminum production A method of preparing carbonaceous blocks or bodies for use in a cathode in an electrolytic cell for producing aluminum wherein the cell contains an electrolyte and has molten aluminum contacting the cathode, the cathode having improved wettability with m... | 09/09/2003 |
| 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 |
| 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 |
| 6511590 | Alumina distribution in electrolysis cells including inert anodes using bubble-driven bath circulation This invention relates to the use of bubble-driven flow to enhance the dissolution and distribution of alumina in an aluminum electrolysis cell operating with inert anodes. By harnessing the driving force of bubbles rising along the sides of a sloped anod... | 01/28/2003 |
| 6497807 | Electrolyte treatment for aluminum reduction A method of treating an electrolyte for use in the electrolytic reduction of alumina to aluminum employing an anode and a cathode, the alumina dissolved in the electrolyte, the treating improving wetting of the cathode with molten aluminum during electrol... | 12/24/2002 |
| 6447667 | Thermal shock protection for electrolysis cells A cermet anode of an electrolytic cell is protected from thermal shock during cell start-up by coating an outer surface portion of the anode with a coating composition comprising carbon or aluminum or a mixture thereof. A particularly preferred coating co... | 09/10/2002 |
| 6440279 | Chemical milling process for inert anodes A cermet inert anode having a reduced level of contaminating surface metal is disclosed. Methods for preparing cermet inert anodes and methods for treating cermet inert anodes are also disclosed. The methods generally use an oxidizing agent to convert met... | 08/27/2002 |
| 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 |
| 6419813 | Cathode connector for aluminum low temperature smelting cell Cathode connector means for low temperature aluminum smelting cell for connecting titanium diboride cathode or the like to bus bars.... | 07/16/2002 |
| 6419812 | Aluminum low temperature smelting cell metal collection A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte. The method comprises the steps of providing a molten salt electrolyte in an electrolytic cell having an anodic liner for containing the electrolyte, the... | 07/16/2002 |
| 6416649 | Electrolytic production of high purity aluminum using ceramic inert anodes A method of producing commercial purity aluminum in an electrolytic reduction cell comprising ceramic inert anodes is disclosed. The method produces aluminum having acceptable levels of Fe, Cu and Ni impurities. The ceramic inert anodes used in the proces... | 07/09/2002 |
| 6372119 | Inert anode containing oxides of nickel iron and cobalt useful for the electrolytic production of metals An inert anode for the electrolytic production of metals such as aluminum is disclosed. The inert anode includes a ceramic oxide material preferably made from NiO, Fe2 O3 and CoO. The inert anode composition may comprise the followin... | 04/16/2002 |
| 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 |
| 6287447 | Method of producing aluminum in a drained cathode cell 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,... | 09/11/2001 |
| 6217739 | Electrolytic production of high purity aluminum using inert anodes A method of producing commercial purity aluminum in an electrolytic reduction cell comprising inert anodes is disclosed. The method produces aluminum having acceptable levels of Fe, Cu and Ni impurities. The inert anodes used in the process preferably com... | 04/17/2001 |
| 6103090 | Electrocatalytically active non-carbon metal-based anodes for aluminium production cells A non-carbon, metal-based high temperature resistant anode of a cell for the production of aluminium has a metal-based substrate coated with one or more electrically conductive adherent applied layers, at least one electrically conductive layer being elec... | 08/15/2000 |
| 6083362 | Dimensionally stable anode for electrolysis, method for maintaining dimensions of anode during electrolysis A dimensionally stable electrode is provided comprising a hollow substrate with an open upper end for confining a fluid containing a metal, a film covering portions of the external surface; and a mechanism for replenishing the film. Also provided is a met... | 07/04/2000 |
| 6039862 | Method featuring a non-consumable anode for the electrowinning of aluminum The present invention includes a conceptually new process to produce primary aluminum through the modification/adaptation for the HHC of a non-consumable anode of the type used for solid oxide fuel cells (SOFC) with the provision to electrochemically util... | 03/21/2000 |
| 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 |
| 5942097 | Method and apparatus featuring a non-consumable anode for the electrowinning of aluminum The present invention includes a conceptually new process to produce primary aluminum through the modification/adaptation for the HHC of a non-consumable anode of the type used for solid oxide fuel cells (SOFC) with the provision to electrochemically util... | 08/24/1999 |
| 5342491 | Bonding of bodies of refractory hard materials to carbonaceous supports Bodies (3) such as tiles, plates, slabs or bricks of Refractory Hard Material (RHM) or other refractory composites are bonded to the cathodes or to other components, in particular to a carbon cell bottom (1), of a cell for the production of aluminium by e... | 08/30/1994 |
| 5217583 | Composite electrode for electrochemical processing and method for using the same in an electrolytic process for producing metallic aluminum A dimensionally stable combustion synthesis product of a composition containing at least 20% by weight of a particulate combustible material; at least 15% by weight of a particulate filler material capable of providing desired mechanical and electrical pr... | 06/08/1993 |
| 5129998 | Refractory hard metal shapes for aluminum production The density of various refractory hard metal articles are controlled so that articles made from the refractory hard metals are able to float on the surface of molten aluminum. Floating such articles on aluminum has been found to both stabilize and protect... | 07/14/1992 |
| 5028301 | Supersaturation plating of aluminum wettable cathode coatings during aluminum smelting in drained cathode cells This invention relates to a process for electrowinning molten aluminum from alumina dissolved in molten fluoride salts which are essentially cryolite. More specifically the process relates to the treatment of aluminum reduction cell drained solid cathode ... | 07/02/1991 |
| 5015343 | Electrolytic cell and process for metal reduction An improved electrolytic cell and process are provided wherein metals and metal alloys are formed from oxides or nitrides in a molten salt, without the evolution of halogen or halogen compounds, with less corrosion and reduced power consumption by the use... | 05/14/1991 |
| 4885073 | Activated carbon anode including lithium This invention relates to a lithum-containing carbon anode employed in the process of producing aluminum metal where the lithium compounds in an amount of 0.1 to 1.5 percent by weight were added into the carbon mass made of pitch and calcined coke to prod... | 12/05/1989 |
| 4597839 | Method and apparatus for production of a metal from metallic oxide ore An anode of reducing agent material particulates is introduced into an electrolytic solvent bath under compression. The carbon material is selected such that there is a minimum number of particle contacts. In such a selection, the contact surface area is ... | 07/01/1986 |
