| 摘要 |
An electrolysis cell for the production of aluminium by the electrolysis of alumina dissolved in a molten halide electrolyte, preferably at a temperature below 880 DEG C, using a multimonopolar arrangement of substantially non-consumable anodes (2) and cathodes (1) with facing operative surfaces which are upright or at a slope and are in spaced substantially parallel relationship, enabling operation at low anode current density with an acceptable production per unit cell floor area. The operative surface area of the anodes (2) and cathodes (1) is high due to their upright of sloping configuration. The operative surfaces of the anodes (2) and possibly of the cathodes (1) can be increased by making them porous, preferably with a reticulated skeletal structure, e.g. with a porous active part (13) on opposite faces of a central current feeder (12). There is an upward circulation of electrolyte by gas lift between the electrodes, there being electrolyte circulation guide means such as spacers (5) adjacent the edges of the facing anodes (2) and cathodes (1). |
