| 摘要 |
A cell for the electrowinning of aluminium comprises an electrolysis cham ber (20) in which alumina is electrolysed to produce aluminium (30) and a co llection reservoir (40,40' ) in which product aluminium is collected. The el ectrolysis chamber and the collection reservoir are in liquid communication so that aluminium produced in the electrolysis chamber can flow from the ele ctrolysis chamber into the collection reservoir. The electrolysis chamber co ntains one or more metal-based anodes (15). Each anode has an active anodic surface (16) spaced above a facing cathodic surface (31) on which aluminium is produced. The cathodic surface is formed on a structural body (12) by a l ayer made of molten aluminium into which product aluminium is incorporated d uring operation. The anodic surface and the cathodic surface have a substant ially constant operative position. The cell has means ( 60, 60', 61, 61', 62 ) for regulating the layer of molten aluminium so the layer forms a shallow or deep continuous cathodic pool (35) that extends continuously under the en tire facing active anodic surface of at least one anode. The layer regulatin g means are arranged to maintain during operation the cathodic surface of th e cathodic pool at a substantially constant position by periodic or continuo us removal of molten aluminium from the aluminium pool to the collection res ervoir at a rate corresponding substantially to the rate of production of th e product aluminium that is incorporated into the aluminium pool.
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