| 摘要 |
<p>A thermally insulating cover of a cell for the electrowinning of aluminium from alumina dissolved in a fluoride-based molten electrolyte, which cover is inert and resistant to high temperature corrosive media in the form of liquids, vapours and/or gases that are contained in the cell and that comprise vapours from the electrolyte, and which cover during use is exposed to such corrosive media, the cover comprising thermal insulating material shielded from the corrosive media by an openly porous or reticulated alumina structure which is made impermeable by a compact filler made of material resistant and inert to the corrosive media, the filler material comprising compacted particles of refractory material.</p> |
