Class / Patent application number | Description | Number of patent applications / Date published |
205336000 | Utilizing fused bath (e.g., eliminating anode effect in a fused bath, etc.) | 11 |
20110094891 | METHOD OF PRODUCING ALUMINIUM IN AN ELECTROLYSIS CELL - The invention relates to a method of producing aluminium in an electrolysis cell, which includes setting up a succession of control periods of duration T, identifying perturbative tending operations on the cell that can introduce superfluous alumina in the electrolytic bath, noting the performance of the perturbative tending operations, determining a regulation feed rate B(k′) for each control period k′ and setting a specified feed rate SR(k′) equal to M(k′)×B(k′), where M(k′) is a predetermined modulation factor that modulates the regulation feed rate B(k′) so as to take into account a reduction of the needs of the cell induced by the superfluous alumina. The method of the invention makes it possible to significantly reduce the rate of occurrence of anode effects. | 04-28-2011 |
20110100831 | METHOD OF DETERMINING THE EXTENT OF A METAL OXIDE REDUCTION - The present invention relates to a method for determining the extent of electrochemical extraction of a metal (M) from a metal (M) oxide caused by a voltage applied between a cathode comprising (or consisting essentially of) or in contact with the metal (M) oxide and an inert metal alloy anodein an oxygen-dissolving molten electrolyte. | 05-05-2011 |
20110147226 | SHUT-DOWN AND START-UP PROCEDURES OF AN ELECTROLYTIC CELL - A process for shutting down an operating electrolytic cell for the production of aluminium is described. The process includes: lowering anodes until a lower portion of the anodes is immersed in an aluminium layer; allowing the aluminium layer and an electrolyte bath to cool down with the lower portion of the anodes immersed in the aluminium layer; determining if the electrolyte bath is solidified, and if the electrolyte bath is solidified, raising the anodes before solidification of the aluminium layer to create a space between the solidified electrolyte bath and the anodes and the aluminium layer. | 06-23-2011 |
20120228144 | High-purity fluorine gas, the production and use thereof, and a method for monitoring impurities in a fluorine gas - An apparatus for producing a fluorine gas, comprising at least one fluorine generating cell, and at least one fluorine generating cell detector for detecting components of products obtained by the fluorine generating cell, wherein at least one of the fluorine generating cells is connected with the fluorine generating cell detector. | 09-13-2012 |
20140048421 | Systems and methods for preventing thermite reactions in electrolytic cells - A method of monitoring an electrolytic cell including detecting information indicative of a thermite reaction, comparing the information indicative of a thermite reaction to a threshold, generating a thermite response signal according to the comparison, and reacting to the thermite response signal by adjusting the operation of the electrolytic cell. | 02-20-2014 |
20140076733 | DRY CELL START-UP OF AN ELECTROLYTIC CELL FOR ALUMINUM PRODUCTION - A method for starting up an electrolytic cell ( | 03-20-2014 |
20140090984 | SYSTEMS AND METHODS FOR STEREOSCOPIC IMAGING OF ALUMINUM ELECTROLYSIS POT TENDING OPERATIONS - Systems and methods for stereoscopic imaging and viewing of aluminum electrolysis and related operation and/or maintenance activities are disclosed. The system may produce stereoscopic images based at least in part on images obtained from two or more imaging devices. The system may display the stereoscopic images for viewing to facilitate aluminum electrolysis cell operation and/or maintenance. | 04-03-2014 |
20140209477 | ELECTRO-DEOXIDATION METHOD, APPARATUS AND PRODUCT - The subject invention concerns an electro-decomposition process wherein a cathode comprising a metal compound is contacted with a fused salt electrolyte in an electrochemical cell. The metal compound is a compound between a metal and another substance, and a voltage is applied between the cathode and an anode such that the substance is removed from the metal compound. In the improved method, the applied voltage increases with time, either continuously or stepwise, up to a predetermined maximum voltage. In addition, or in the alternative, the fused salt composition is selected so as to maintain a predetermined concentration of the substance in the fused salt during electro-decomposition. | 07-31-2014 |
20150008136 | METHOD OF SEPARATING AND RECOVERING METALS AND SYSTEM FOR SEPARATING AND RECOVERING METALS - According to one embodiment, a method of separating and recovering metals whereby a mixture containing at least a first metal and a second metal, the second metal having a higher standard electrode potential than that of the first metal, is connected to an anode in a molten salt, and the first metal and the second metal are precipitated on a cathode in the molten salt by electrolysis, the method of separating and recovering metals comprising: a detection step of detecting a concentration change in each of a first metal ion and a second metal ion in the molten salt by a concentration change detection unit; a first electrolysis step of electrolyzing the first metal; a first recovery step of recovering a precipitated substance according to a detection in which a concentration decrease of the first metal ion, which is predefined in the concentration change detection unit, is detected in the detection step; a second electrolysis step of electrolyzing the second metal; and a second recovery step of recovering a precipitated substance subsequent to the first recovery step. | 01-08-2015 |
20160201208 | Aluminium Smelter Comprising a Compensating Electric Circuit | 07-14-2016 |
20180023207 | Aluminium Smelter and Method to Compensate for a Magnetic Field Created by the Circulation of the Electrolysis Current of Said Aluminium Smelter | 01-25-2018 |