Aluminium electrowinning cells having a v-shaped cathode bottom

Details Aluminium electrowinning cells having a v-shaped cathode bottom Aluminium electrowinning cells having a v-shaped cathode bottom

C - Chemistry, Metallurgy

25

C

C25C 3/08 (2006.01)

Patent

CA 2369450

A cell for the electrowinning of aluminium comprises a plurality of metal- based anodes (11) facing and spaced apart from an aluminium-wettable drained cathode surface (21) on which aluminium is produced. The drained cathode surface is formed along the cell by upper surfaces of a series of juxtaposed carbon cathode blocks (20), the cathode blocks extending across the cell. The drained cathode surface is divided into quadrants by a longitudinal aluminium collection groove (26) along the cell and by a central aluminium collection reservoir across the cell. Pairs of quadrants across the cell are inclined in a V-shape relationship, the collection groove being located along the bottom of the V-shape and arranged to collect molten aluminium draining from the drained cathode surface and evacuate it into the aluminium collection reservoir during cell operation.

L'invention concerne une cellule d'extraction électrolytique de l'aluminium comprenant une pluralité d'anodes métalliques opposées et espacées d'une surface cathodique drainée mouillable par l'aluminium sur laquelle l'aluminium est produit. La surface cathodique drainée est formée le long de la cellule par des surfaces supérieures d'une série de blocs cathodiques de carbone juxtaposés, les blocs cathodiques s'étendant à travers la cellule. La surface cathodique drainée est divisée en quadrants par une rainure de collecte d'aluminium longitudinale pratiquée le long de la cellule et par un réservoir de collecte de l'aluminium central traversant la cellule. Des paires de quadrants traversant la cellule sont inclinés et forment un V, la rainure de collecte étant disposée le long du fond de la forme en V et servant à recueillir l'aluminium fondu issu de la surface cathodique drainée et de l'évacuer dans le réservoir de collecte de l'aluminium en cours d'opération.

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