Inert anode for producing aluminium by igneous electrolyse...

C - Chemistry – Metallurgy – 22 – C

Patent

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C22C 29/12 (2006.01) B22F 3/00 (2006.01)

Patent

CA 2542117

The invention relates to a method for producing a solid part for forming an entire anode or the part thereof for producing aluminium by igneous electrolyse and comprising a cermet made of at least one type of metal oxide such as a spinel mixed oxide containing a R metal in the form of cations in the chemical structure thereof. Said R metal is entirely or partly reducible by a reducing operation during a production process in such a way that the entire metallic phase or the part thereof is formed. The inventive method makes it possible to obtain a cermet whose metallic phase comprises a homogenous distribution of fine metallic particles.

L'invention a pour objet un procédé de fabrication d'une pièce massive, destinée à former tout ou partie d'une anode pour la production d'aluminium par électrolyse ignée, et contenant un cermet formé d'au moins un oxyde métallique, tel qu'un oxyde mixte à structure de spinelle, et d'au moins une phase métallique, dans lequel on utilise un oxyde mixte comportant un métal R sous forme de cations dans sa structure chimique, ledit métal R étant susceptible d'être réduit en tout ou partie par une opération de réduction, au cours du procédé de fabrication, de manière à former tout ou partie de ladite phase métallique. Ce procédé permet d'obtenir un cermet dont la phase métallique comporte une distribution homogène de fines particules métalliques.

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