| 摘要 |
A cell (1) for the electrowinning of aluminium from alumina dissolved in a fluoride-containing molten electrolyte (20) is disclosed. The cell (1) has a cavity for containing the electrolyte (20) and one or more non emerging active anode bodies (5) that are suspended in the electrolyte (20). The electrolyte (20) has a surface (21) that has an expanse extending over the cavity and that is covered by a self-formed crust of frozen electrolyte (25). The crust (25) is mechanically reinforced by at least one preformed refractory body (30, 30', 30''). The electrolyte crust (25) is formed against the preformed refractory body (30, 30', 30'') and bonded thereto so as to inhibit mechanical failure of the crust and collapse of the crust (25) into the cavity.
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