Cu-ni-fe anode for use in aluminum producing electrolytic cell

C - Chemistry – Metallurgy – 25 – C

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C25C 3/12 (2006.01) C25C 3/06 (2006.01)

Patent

CA 2524848

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 less than 900~C having alumina dissolved therein in an electrolytic cell having a liner for containing the electrolyte, the liner having a bottom and walls extending upwardly from said bottom. A plurality of non-consumable Cu-Ni-Fe anodes and cathodes are disposed in a vertical direction in the electrolyte, the cathodes having a plate configuration and the anodes having a flat configuration to compliment the cathodes. The anodes contain apertures therethrough to permit flow of electrolyte through the apertures to provide alumina-enriched electrolyte between the anodes and the cathodes. Electrical current is passed through the anodes and through the electrolyte to the cathodes, depositing aluminum at the cathodes and producing gas at the anodes.

Cette invention concerne un procédé d'obtention d'aluminium dans une cellule électrolytique contenant de l'alumine dissoute dans un électrolyte. Pour ce procédé, on utilise un électrolyte de sel fondu à une température inférieure à 900 ·C renfermant de l'alumine dissoute, ceci dans une cellule électrolytique dotée d'une chemise destinée à recevoir l'électrolyte, chemise qui présente un fond et des parois partant du fond et orientées vers le haut. Une pluralité d'anodes et de cathodes Cu-Ni-Fe réfractaires sont disposées verticalement dans l'électrolyte. Les anodes ont la forme de plaque et les cathodes une forme plate correspondante. Les anodes présentent des ouvertures traversantes laissant passer l'électrolyte, ce qui permet d'obtenir un électrolyte enrichi en alumine entre les anodes et les cathodes. Un courant électrique qui traverse les anodes et l'électrolyte en direction des cathodes dépose de l'aluminium sur lesdites cathodes et produit un gaz au niveau des anodes.

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