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7628904 |
Minimising carbon transfer in an electrolytic cell
An electrochemical cell for electrochemical reduction of a metal oxide in a solid state is disclosed. The cell includes a molten electrolyte ( 14 ), an anode ( 10 ) formed from carbon in contact...
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7618519 |
Cathode element for use in an electrolytic cell intended for production of aluminum
This invention relates to a cathode element for use in a pot of an electrolytic cell intended for production of aluminum. The cathode element comprises a cathode block and a steel connection bar....
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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,...
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7513979 |
Series of electrolysis cells for the production of aluminium comprising means for equilibration of the magnetic fields at the ends of the lines
The invention relates to a series ( 1 ) of electrolysis cells for the production of aluminum by fusion electrolysis, comprising at least two lines of cells, arranged transversely, an internal...
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7504010 |
Anode for electrolysis of aluminum
The present invention relates to a dimensionally stable oxygen-evolving anode for use in an electrolytic cell for the production of aluminium. The anode comprises of a container made from an alloy...
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7504016 |
Method and system for controlling addition of powdery materials into the bath of an electrolysis cell for the production of aluminium
This invention relates to a method for controlling additions of powder materials into an electrolytic cell designed for the production of aluminium by fused bath electrolysis. The method according...
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7481911 |
Fluorine cell
An arrangement for installing and sealing an anode within a fluorine generating electrolytic cell is described, the arrangement comprising: an anode connection member, said anode connection member...
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7470354 |
Utilisation of oxygen evolving anode for Hall-Hèroult cells and design thereof
A method for electrolytic production of aluminium metal from an electrolytic ( 3 ) including aluminium oxide, by performing electrolysis, with at least one inert anode ( 1 ) and at least one...
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7465379 |
Electrolysis cell and structural elements to be used therein
An arrangement of one or more structural elements ( 3 ) in a cell lining, in particular for use as a side lining in aluminum electrolysis cells ( 5 ). The design of and choice of materials for side...
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7445696 |
Monitoring electrolytic cell currents
For an electrolytic cell, an apparatus and method are described that use one or more sensors to measure magnetic field strength about a conductor carrying electrical current. A processor is in...
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7429314 |
Device for controlling the travel distance of a chisel in a feeding system for an aluminium production electrolytic cell
Device for equipment of a cell ( 1 ) comprising an electrolytic bath ( 4 ) covered with a crust ( 5 ), with a chisel ( 13 ) that can be moved vertically between a high position in which it is above...
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7422624 |
Method for operating one or more electrolysiscells for production of aluminium
A method for operating one or more electrolysis cells ( 43, 154, 243 ) for production of aluminium, the cell comprising inert or substantially inert anodes, where an oxygen containing gas ( 21,...
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7384521 |
Method for reducing cell voltage and increasing cell stability by in-situ formation of slots in a Soderberg anode
A self-baking, Soderberg type carbon anode ( 40 ) for use in an aluminum electrolyses cell ( 1 ) to form product aluminum ( 11 ), where the anode ( 40 ) is consumable in molten electrolyte ( 12 )...
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7351322 |
Fluorine gas generator and method of electrolytic bath liquid level control
A fluorine gas generator for generating fluorine gas by electrolysis of an electrolytic bath comprising a hydrogen fluoride-containing mixed molten salt in which generator the position of the...
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7316765 |
Apparatus and method for molten salt electrolytic bath control
An apparatus for controlling a molten salt electrolyzer in which an electrolytic bath in a solid form as contained in the electrolyzer is melted to automatically attain a state allowing...
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7255783 |
Use of infrared imaging to reduce energy consumption and fluoride consumption
Operations in an electrolytic cell for producing aluminum are controlled by sensing infrared radiation on an outer surface of a cell chamber to determine an actual temperature. When the actual...
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7241950 |
Solar cell electrolysis of water to make hydrogen and oxygen
A water permeable electrode for electrochemical splitting of water having a light sensitive catalytic material layer which includes a light sensitive catalytic material and a semiconductor, a...
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7201830 |
Anode for oxygen evolution and relevant substrate
The invention concerns an anode for gas evolution in electrochemical applications comprising a titanium or other valve metal substrate characterized by a surface with a low average roughness,...
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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...
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7175749 |
Method and device for detecting anode effects of an electrolytic cell for aluminum production
Process for early detection of an anode effect in an aluminum production cell based on molten salt electrolysis. The cell comprises at least one anode, at least one cathode and cathode connecting...
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7144483 |
Method and an electrowinning cell for production of metal
The present invention relates to a method for production of molten aluminium by electrolysis of an aluminous ore, preferably alumina, in a molten salt mixture, preferably a sodium...
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7097747 |
Continuous process electrorefiner
A new device is provided for the electrorefining of uranium in spent metallic nuclear fuels by the separation of unreacted zirconium, noble metal fission products, transuranic elements, and uranium...
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7037414 |
Photoelectrolysis of water using proton exchange membranes
A photoelectrochemical cell which includes a light transmissive enclosure, a semiconductor photoanode disposed within the light transmissive enclosure, a semiconductor photocathode disposed within...
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7033469 |
Stable inert anodes including an oxide of nickel, iron and aluminum
Ceramic inert anodes useful for the electrolytic production of aluminum are disclosed. The inert anodes comprise oxides of Ni, Fe and Al. The Ni—Fe—Al oxide inert anode materials have...
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6977031 |
Anode assembly
An anode assembly for conducting electrical energy to an electrolytic smelting cell including an anode of high electrically conductive material connected to a yoke, the ends of the yoke being...
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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...
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6818105 |
Apparatus for generating fluorine gas
A fluorine gas generating apparatus for generating fluorine gas of high purity by electrolysis of a mixed molten-salt comprising hydrogen fluoride, the fluorine gas generating apparatus comprising...
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6811677 |
Electrolytic cell for the production of aluminum and a method for maintaining a crust on a sidewall and for recovering electricity
The present invention relates to an electrolytic cell for the production of aluminum comprising an anode and an electrolytic tank where the electrolytic tank comprises an outer shell made from...
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6797148 |
Drained-cathode aluminium electrowinning cell with improved electrolyte circulation
A drained-cathode cell for the electrowinning of aluminium comprises one or more anodes ( 14 ) suspended over one or more cathodes ( 16 ). The or each anode ( 14 ) and cathode ( 16 ) respectively...
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6790337 |
Method and device for operating an electrolytic cell
The present invention concerns a method and device for reducing emissions of process gases from Hall-Héroult cells to the ambient air. The cells comprise an anode superstructure ( 1 ) with covers...
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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...
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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...
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6689260 |
Nuclear fuel electrorefiner
The present invention relates to a nuclear fuel electrorefiner having a vessel containing a molten electrolyte pool floating on top of a cadmium pool. An anodic fuel dissolution basket and a...
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6682643 |
Aluminium electrowinning cells having a V-shaped cathode bottom and method of producing aluminium
A cell for the electrowinning of aluminium comprises a plurality of metal-based anodes facing and spaced part from an aluminium-wettable drained cathode surface on which aluminium is produced. The...
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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...
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6607657 |
Carbon-containing components of aluminium 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...
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6599413 |
Method and apparatus for the treatment of a melt
A method and apparatus for adding a metal, for example sodium, to a melt of a material, for example aluminum, in a vessel, in which a molten compound of the metal or a solution of a compound of the...
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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...
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6551476 |
Noble-metal coated inert anode for aluminum production
This invention is an inert, non-consumed, anode for use in electrolytic production of aluminum from the ore, consisting of a plurality of parallel vertical wires, or rods, attached to a suspended...
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6551473 |
Electrolytic cell arrangement for production of aluminum
An arrangement of electrolysis pots suitable for use for the production of aluminum by igneous electrolysis according to the Hall-Héroult process with an electrolysis current with intensity Io is...
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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...
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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...
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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...
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6521115 |
Nickel-iron alloy-based anodes for aluminium electrowinning cells
An anode of a cell for the electrowinning of aluminium comprises an iron-nickel alloy body or layer whose surface is oxidised to form a coherent and adherent outer iron oxide-based layer, in...
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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...
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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...
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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...
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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....
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6440293 |
Electrode and electrolyte for use in preparation of nitrogen trifluoride gas, and preparation method of nitrogen trifluoride gas by use of them
An electrode for electrolyzing an electrolyte comprising an ammonium fluoride (NH 4 F)-hydrogen fluoride (HF)-containing molten salt and having a composition ratio (HF/NH 4 F) of 1 to 3 to prepare...
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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...
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