RIO TINTO ALCAN INTERNATIONAL LIMITED Patent applications |
Patent application number | Title | Published |
20160138138 | ALUMINUM ALLOY COMPOSITION WITH IMPROVED ELEVATED TEMPERATURE MECHANICAL PROPERTIES - An aluminum alloy includes, in weight percent, 0.50-1.30% Si, 0.2-0.60% Fe, 0.15% max Cu, 0.5-0.90% Mn, 0.6-1.0% Mg, and 0.20% max Cr, the balance being aluminum and unavoidable impurities. The alloy may include excess Mg over the amount that can be occupied by Mg—Si precipitates. The alloy may be utilized as a matrix material for a composite that includes a filler material dispersed in the matrix material. One such composite may include boron carbide as a filler material, and the resultant composite may be used for neutron shielding applications. | 05-19-2016 |
20150344988 | PROCESS FOR REDUCING OF LEACHABLE FLUORIDES AND CONTROLLING PH OF ALUMINUM WASTE PRODUCTS - The present disclosure provides processes for recycling spent pot lining carbon by-products (SPLCB) obtained from a caustic leach process. The process provides treating spent pot lining (SPL) or SPLCB with Ca/P-containing stabilizing agents. | 12-03-2015 |
20150158084 | METAL TRANSFER TROUGH - A trough for cooling and delivering molten metal to a casting station. The trough comprises a refractory portion for holding the molten metal and heat transfer means associated to external walls of the refractory portion for extracting heat from the molten metal. The heat transfer means may comprise a fluidized bed compartment for holding and fluidizing a fluidization material. Also, the heat transfer means may comprise a cooling jacket, an inner wall of the cooling jacket and the external walls of the refractory portion defining the fluidized bed compartment. | 06-11-2015 |
20150114833 | PREHEATING CONNECTOR - This preheating connector for electrically connecting an anode stern to an anode frame of an electrolytic cell during the warm-up phase of the electrolytic cell, includes means of fixing to the anode frame, and bearing means designed to exert pressure on the anode stem in order to keep it pressed up against the anode frame, the fixing means and bearing means being configured and arranged so as to add on the preheating connector onto a so-called permanent connector for electrical and mechanical connection of the anode stem to the anode frame during the continuous operating mode of the cell. | 04-30-2015 |
20140241818 | METHOD AND DEVICE FOR DISPENSING A FLUIDIZABLE MATERIAL AND INSTALLATION INCLUDING SUCH A DEVICE - The invention relates to a method for distributing powder by means of a main conveyor ( | 08-28-2014 |
20140209457 | ALUMINUM SMELTER COMPRISING ELECTRICAL CONDUCTORS MADE FROM A SUPERCONDUCTING MATERIAL - An aluminum smelter comprising:
| 07-31-2014 |
20140138241 | ALUMINUM SMELTER COMPRISING ELECTRICAL CONDUCTORS MADE FROM A SUPERCONDUCTING MATERIAL - An aluminum smelter comprising:
| 05-22-2014 |
20140138240 | ALUMINUM SMELTER INCLUDING CELLS WITH CATHODE OUTPUT AT THE BOTTOM OF THE POT SHELL AND CELL STABILIZING MEANS - Aluminum smelter comprising: (i) a series of electrolytic cells, comprising an anode, a cathode and a pot shell equipped with a side wall and a bottom, each cathode including at least one cathode output, (ii) a main electric circuit through which an electrolysis current passes, including an electrical conductor connected to each cathode output of a cell N, and to the anode of a cell N+1, and (iii) a means to stabilize the electrolytic cells. At least one of the cathode outputs of the cathode of N passes through the bottom of the pot shell, and during the operation of N and N+1, the electrolysis current passes, in an upstream-downstream direction only, through each electrical conductor extending from each cathode output of N in the direction of N+1. | 05-22-2014 |
20140083569 | ALUMINUM ALLOY COMPOSITION AND METHOD - An aluminum alloy composition includes, in weight percent:
| 03-27-2014 |
20140076733 | DRY CELL START-UP OF AN ELECTROLYTIC CELL FOR ALUMINUM PRODUCTION - A method for starting up an electrolytic cell ( | 03-20-2014 |
20130206707 | APPARATUS AND METHOD FOR REFINING A PROCESS LIQUOR BY GRAVITY SETTLING - An apparatus for refining a process liquor that includes solids, which apparatus includes a vessel having a base and a side wall that define an internal volume for containing the process liquor and for allowing gravity settling of the solids in the liquor, whereby to produce a refined liquor toward a top of the internal volume and a slurry toward a bottom of the internal volume, the apparatus further includes solids displacement elements disposed within the internal volume for directing settled solids and/or settling solids in the vicinity of the side wall or of the base toward a flow path of the slurry being extracted from the slurry outlet. A processing plant including the above refining apparatus and a method for refining a process liquor. | 08-15-2013 |
20130168326 | FLOCCULENT ADDITION AND MIXING RATE FOR SEPARATING A SLURRY - The invention concerns a method for separating solid and liquor components of a process slurry comprising solid material entrained in a liquor, said method comprising: (a) a pre-treatment step of adding a flocculent to the process slurry and mixing the flocculent and the slurry by selecting a higher extent of mixing in an early stage of said step than in a later stage of said step, and (b) a solid/liquor separation step of allowing separation of solid material, including aggregates of solid material, and liquor of said process slurry to produce process outputs of a clarified liquor and solid material with some entrained liquor. The invention also concernes a method and an apparatus for adding a flocculent to a process slurry. | 07-04-2013 |
20130168218 | ELECTRICAL CONNECTION DEVICE, FOR CONNECTING BETWEEN TWO SUCCESSIVE CELLS OF A SERIES OF CELLS FOR THE PRODUCTION OF ALUMINIUM - The electrical connection device connecting the cells in series comprises:
| 07-04-2013 |
20130098773 | DEVICE FOR EXTRACTING SHORT-CIRCUITING WEDGES DESIGNED FOR SWITCHING IN AN ELECTROLYSIS CELL FOR THE PRODUCTION OF ALUMINUM - Extraction device designed to extract a short-circuiting wedge inserted between two conductors to take an electrolysis cell offline. The extraction device includes a means of gripping said wedge and, in conjunction with the upper horizontal face of each conductor, at least one jack directed vertically and including a body and a stem,
| 04-25-2013 |
20130098755 | DEVICE FOR EXTRACTING SHORT-CIRCUITING WEDGES WHEN SWITCHING IN AN ELECTROLYSIS CELL FOR THE PRODUCTION OF ALUMINUM - Extraction device designed to extract a short-circuiting wedge inserted between two conductors to take an electrolysis cell offline. The extraction device includes a means of gripping said wedge and at least one jack directed vertically and including a body and a piston stem.
| 04-25-2013 |
20120258010 | COPPER ALUMINUM ALLOY MOLDED PART HAVING HIGH MECHANICAL STRENGTH AND HOT CREEP RESISTANCE - The subject of the invention is a cast part with high static mechanical strength, and high hot creep strength, made of aluminum alloy of chemical composition: | 10-11-2012 |
20120246923 | PROCESS FOR CHANGING A SPENT ANODE AND SUPPORT AND SYSTEM FOR THE TEMPORARY STORAGE OF SUCH A SPENT ANODE - The process involves pouring a smothering powder onto a spent anode placed on a support to cover it, with the aim of limiting fluorinated gas emission by the anode. | 10-04-2012 |
20120230778 | POTENTIAL FLUIDIZATION DEVICE FOR CONVEYING POWDER MATERIALS IN A HYPERDENSE BED - Device for transporting powder comprising a conveyer, which includes a lower channel in which a gas circulates, and an upper channel, designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall that said gas can pass through, the lower channel being supplied with gas at a pressure allowing the potential fluidization of said powder in said upper channel, said upper channel being provided in its upper part with transverse walls placed so that they delimit with the upper wall of said upper channel at least one upper zone in which a gas bubble under pressure is formed as a result of putting said air chute under potential fluidization pressure. At the level of at least one bubble so formed, the wall of the upper channel includes a means of removal for fluidization gas provided with a means of creating pressure drop, which creates a substantially constant pressure drop. | 09-13-2012 |
20120152985 | REMOVABLE SPOUT FOR A HOPPER | 06-21-2012 |
20120125784 | GROOVED ANODE FOR ELECTROLYSIS CELL - The subject of the invention is an anode block ( | 05-24-2012 |
20120097154 | CONTROL PROCESS FOR AN ANODE BAKING FURNACE AND ADAPTED FURNACE USING SUCH PROCESS - Control process for a furnace for baking carbon anodes comprising:
| 04-26-2012 |
20110311930 | PROCESS AND CONTROL SYSTEM FOR A CARBONACEOUS BLOCK BAKING FACILITY - The furnace of the facility includes partitions in which hot gases from the baking of carbonaceous blocks circulate, and heating ramps (21, 22, 23) revolving in relation to the furnace, equipped with burners or fuel injectors. Gas circulation lines (24) are defined along the partitions between an air blowing leg (20) and a corresponding gas suction leg (12). To detect even partial partition blocking of a partition, the process includes, on a continuous basis:
| 12-22-2011 |
20110192728 | METALLIC OXYGEN EVOLVING ANODE OPERATING AT HIGH CURRENT DENSITY FOR ALUMINIUM REDUCTION CELLS - A metallic oxygen evolving anode for electrowinning aluminium by decomposition of alumina dissolved in a cryolite-based molten electrolyte, and operable at anode current densities of 1.1 to 1.3 A/cm2, comprises an alloy of nickel, iron, manganese, optionally copper, and silicon. Preferably, the alloy is composed of 64-66 w % Ni; Iron; 25-27 w % Fe; 7-9 w % Mn; 0-0.7 w % Cu; and 0.4-0.6 w % Si. The weight ratio Ni/Fe is in the range 2.1 to 2.89, preferably 2.3 to 2.6, the weight ratio Ni/(Ni+Cu) is greater than 0.98, the weight ratio Cu/Ni is less than 0.01, and the weight ratio Mn/Ni is from 0.09 to 0.15. The alloy surface can comprise nickel ferrite produced by pre-oxidation of the alloy. The alloy, optionally with a pre-oxidised surface, can be coated with an external coating comprising cobalt oxide CoO. | 08-11-2011 |
20110158868 | IMPROVEMENT TO THE BAYER PROCESS FOR PRODUCING ALUMINA TRIHYDRATE, SAID PROCESS COMPRISING A STEP IN WHICH THE SUPERSATURATED LIQUOR IS FILTERED AT HIGH TEMPERATURE BEFORE DECOMPOSITION - Process for manufacturing alumina trihydrate by alkaline attack of bauxite, following the general steps of the Bayer process, and during which, after settling and before decomposition, the aluminate liquor undergoes a filtration, known as security filtration, so that at the end of the filtration it contains less than 10 mg/l of insoluble particles, characterized in that, during said security filtration, a filtration device is used that comprises a zone in which the liquor is subjected, after passing through said filtration media, to a pressure greater than 2 bar, preferably greater than 3 bar. Preferably, this device also comprises a zone in which the liquor is subjected, before passing through the filtration media, to a pressure greater than 5 bar, preferably greater than 6, typically in the vicinity of 7 bar. In this way, the aluminate liquor can be kept at a high temperature during the security filtration, typically greater than 130° C., preferably greater than 140° C., and be brought to a high degree of supersaturation Rp, typically greater than 1.25, without risk of reversion. | 06-30-2011 |
20110126947 | CASTING MADE FROM ALUMINIUM ALLOY, HAVING HIGH HOT CREEP AND FATIGUE RESISTANCE - The subject of the invention is a cast part with high static mechanical strength, and for fatigue and hot creep, made of aluminum alloy of composition:
| 06-02-2011 |
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 |
20110073470 | MULTI-LAYER CATHODE BLOCK - A multi-layer cathode block ( | 03-31-2011 |