| 摘要 |
An improved alumina reduction cell is described in which the carbonaceous cathode includes refractory hard metal tiles projecting upwardly from the cell surface thereof, forming the true cathode surface, and a solid layer of alumina and cryolite beneath the molten aluminum produced within the cell and the alumina-cryolite bath from which the molten aluminum is obtained. This bottom alumina-cryolite layer protects the refractory hard metal-carbonaceous interface from attack by the molten aluminum, increasing the useful life of the cell.
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