Cathode collector bar with spacer for improved heat balance

Details Cathode collector bar with spacer for improved heat balance Cathode collector bar with spacer for improved heat balance

C - Chemistry, Metallurgy

25

C

C25C 3/16 (2006.01)

Patent

CA 2347858

An electrolytic cell (4) for aluminum production, including a cell wall (7, 18), a bus bar (46, 48), a carbonaceous cathode block (10), and a collector bar (30) connecting the bus bar with the cathode block. The collector bar comprises a ferrous metal body including a solid spacer (32) and a sheath (33) defining a cavity (34) containing a copper insert (40). The spacer has an external end portion (35) connected with the bus bar and an internal end portion (36) that is preferably spaced inwardly of the cell wall. The spacer separates the copper insert from the bus bar, thereby reducing heat loss from the cell.

L'invention concerne une cellule (4) électrolytique destinée à la production d'aluminium, comprenant une paroi (7, 18), un barre omnibus (46, 48), un bloc (10) cathodique carboné et une barre (30) collectrice connectant la barre omnibus au bloc cathodique. La barre collectrice se compose d'un corps de métal ferreux comprenant un élément (32) d'espacement plein et une gaine (33) qui délimite une cavité (34) contenant une âme (40) en cuivre. L'élément d'espacement comprend une partie (35) terminale externe reliée à la barre omnibus et une partie (36) terminale interne qui est de préférence séparée de la paroi de la cellule par un retrait vers l'intérieur. L'élément d'espacement sépare l'âme en cuivre de la barre omnibus et réduit ainsi les pertes thermiques de la cellule.

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