Method and apparatus for the production of aluminium from...

Details Method and apparatus for the production of aluminium from... Method and apparatus for the production of aluminium from...

C - Chemistry, Metallurgy

22

B

C22B 21/00 (2006.01) C25C 3/06 (2006.01)

Patent

CA 2355662

Method for the production of primary aluminium from alumina comprising the step of converting alumina into aluminiumsulfide (Al2S3) and subsequently the separation of aluminium from aluminiumsulfide wherein the conversion of alumina into aluminiumsulfide is performed by reacting alumina with CS2 containing gas at a temperature T a1 whereby the alumina is mainly .gamma.-alumina. Apparatus for performing the method comprises a first reactor (1) for the manufacture of CS2, a second reactor (5) for the manufacture of Al2S3 from CS2 and Al2O3, and a third reactor (8), preferably an electrolysis cell, for the manufacture of Al from Al2S3.

Un procédé de production d'aluminium primaire à partir d'alumine consiste à transformer l'alumine en aluminium sulfuré (Al2S3) puis à séparer l'aluminium de l'aluminium sulfuré, cette conversion de l'alumine en aluminium sulfuré étant effectuée au moyen de la réaction de l'alumine avec un gaz contenant du CS2 à une température Tal, l'alumine étant principalement de l'alumine gamma. Un appareil utilisé pour mettre en oeuvre le procédé comprend un premier réacteur (1) servant à produire CS2, un deuxième réacteur (5) servant à produire Al2S3 à partir de CS2 et de Al2O3, un troisième réacteur (8), de préférence une cellule d'électrolyse, pour produire Al à partir de Al2S3.

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