| 摘要 |
Disclosed is a cell for the electrowinning of aluminium from alumina dissolved in a molten electrolyte, comprising a generally horizontal cell bottom on which a pool of product aluminium is collected and at least one electrically conductive cathodic element having one or sloping upper aluminium-wettable drained active cathode surfaces separated by an anode-cathode gap from one or more anodes with corresponding sloping active anode surfaces, wherein the cathodic element comprises an inclined cathodic wall in the electrolyte above the generally horizontal cell bottom, the cathodic wall being made of an aluminium-wettable openly porous ceramic material which is mechanically and chemically resistant and which is filled with molten aluminium, the cathodic wall having: (a) an upwardly-oriented inclined face that forms the sloping upper aluminium-wettable drained active cathode surface(s) on which aluminium is produced and drains in the aluminium pool, and (b) a downwardly-oriented inclined face which is in contact with the molten electrolyte and which overlies the aluminium pool, the aluminium pool covering substantially the entire cell bottom including underneath the cathodic wall. Also disclosed is a method of electrowinning aluminium in the above cell.
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