ALCAN INTERNATIONAL LIMITED Patent applications |
Patent application number | Title | Published |
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 |
20110139267 | System and Apparatus for Controlled Siphoning - A siphoning operation is controlled to meet a target flow rate of liquid being siphoned into a container having a headspace to which a vacuum is induced with an ejector. The incremental mass of liquid siphoned into the container is monitored and the vacuum applied to the container is continuously adjusted. A vacuum regulator responsive to an electric current-to-pressure converter which is coupled to a control unit is provided to control the flow of pressurized fluid delivered to the ejector. | 06-16-2011 |
20110135533 | HIGH STRENGTH ALUMINIUM ALLOY EXTRUSION - An aluminium extrusion having a minimum section thickness and made from an aluminium alloy includes, in weight percent, between approximately 1.0 and 1.7 manganese, and between approximately 0.5 and 1.1 silicon, less than 0.3 iron with the balance being Al and inevitable impurities each less than 0.05 weight % and totaling less than 0.15 weight %, the extrusion being formed with an extrusion ratio less than 125 to retain a fibrous grain structure in which less than 40% of the minimum section thickness is recrystallized. | 06-09-2011 |
20110100615 | ALUMINUM ALLOY STRIPS FOR BRAZED HEAT EXCHANGER TUBES - A brazing sheet made up of a core sheet made of aluminum alloy covered on at least one side with a layer of cladding forming a sacrificial anode. The layer of cladding is formed of an aluminum alloy of chemical composition, in % by weight: Si: >2.0-7.0; Fe<0.5; Cu<1.0; Mn: 1.0-2.0; Mg<0.5; Zn: 1.0-3.0; Cr<0.25; Ni<1.5; Ti<0.25; Co<1.5; V, In, Sn, Zr, Sc<0.25 each; other elements <0.05 each and 0.15 in total. A heat exchanger tube may be produced by folding and brazing from the brazing sheet, where the layer of cladding forms a sacrificial anode constituting the lining of the tube or “inner-liner.” | 05-05-2011 |
20100294635 | DEVICE AND METHOD FOR SHORT-CIRCUITING ONE OR MORE CELLS IN AN ARRANGEMENT OF ELECTROLYSIS CELLS INTENDED FOR THE PRODUCTION OF ALUMINIUM - The invention relates to a device ( | 11-25-2010 |
20100209863 | RING FURNACE INCLUDING BAKING PITS WITH A LARGE HORIZONTAL ASPECT RATIO AND METHOD OF BAKING CARBONACEOUS ARTICLES THEREIN - The invention relates to a ring furnace ( | 08-19-2010 |
20100189518 | PROCESS FOR CONVEYING POWDER MATERIALS WITHOUT SEGREGATION - A process making it possible to transport by potential fluidization, a powder material, in which a device is fitted between the supply zone, typically a storage zone for said powder material, and the zone to be supplied, said device including at least one substantially horizontal conveyor, called an “air chute”, which includes a lower duct designed for the circulation of a gas and an upper duct designed for the circulation of the powder material, said lower duct and said upper duct being separated by a porous wall that said gas can pass through, a process in which the upper duct is filled with said powder material and the lower duct is supplied with gas at a pressure that allows the potential fluidization of said powder material in said upper duct said upper duct being provided with at least one balancing column. In this process, the minimal bubbling speed, which corresponds to the maximum void fraction, is determined beforehand and the fluidization pressure is set to a value such that the fluidization speed of said gas is between 0.8 and 1.5 times said minimal bubbling speed, preferably between 0.9 and 1.3 times said minimal bubbling speed. | 07-29-2010 |
20100092748 | METHOD OF MANUFACTURING ALUMINIUM NITRIDE - The invention relates to a method of manufacturing aluminium nitride, in which a multilayer structure including rolled aluminium-based products is prepared by stacking or winding, and it is heated under a nitrogenous atmosphere, the majority of the nitriding occurring during a phase in which the temperature of the nitrogenous atmosphere is maintained between 400° C. and 660° C. The invention makes it possible to obtain aluminium nitride via an economic method requiring neither the use of aluminium powder as a raw material nor the use of very high temperatures. The aluminium nitride obtained includes particles the microscopic structure of which is layered. | 04-15-2010 |
20090030256 | ELECTROCHEMICAL REMOVAL OF DISSOCIABLE CYANIDES - The method of the invention provides means of destroying highly stable metal cyanide ions found in a solution, and converting the cyanide to harmless by-products. Contrary to conventional methods which merely complex the cyanide into a mechanically or physically removable complex, the present method destroys the cyanide found in the sample. The invention is directed to a method of destroying cyanide comprising providing a highly alkaline solution containing a metal cyanide ions; and subjecting the solution to electro-oxidation. | 01-29-2009 |
20080307927 | In-Line Salt Refining of Molten Aluminium Alloys - The present invention describes an apparatus and a process for in-line substantially continuous degassing of aluminium and/or aluminium alloys, in absence of chlorine and through the injection of at least one metal halide salt that includes a halogen and water and an inert gas, in a transfer trough before casting. | 12-18-2008 |
20080299001 | ALUMINUM ALLOY FORMULATIONS FOR REDUCED HOT TEAR SUSCEPTIBILITY - The present invention relates to modified alloy compositions for reduced hot tear susceptibility, the aluminum alloy comprising from 0.01 to 0.025% by weight of Sr; and TiB2, measured by its boron content, from 0.001 to 0.005% by weight of B. The invention also relates to a method of preventing or eliminating hot tears in an aluminum alloy comprising the step of combining with aluminum: from 0.01 to 0.025% by weight of Sr; and TiB2, measured by its boron content, from 0.001 to 0.005% by weight of B. | 12-04-2008 |