A method and a device in connection with handling covers in...

C - Chemistry – Metallurgy – 25 – C

Patent

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Details

C25C 3/22 (2006.01) C25C 7/06 (2006.01)

Patent

CA 2630912

The present invention concerns a method and device in connection with an electrolytic cell of the Hall-Heroult type for the production of aluminium. The method relates to the handling of covers in a superstructure in an electrolytic cell, whereby the cell comprises one or more removable covers mounted side by side. Such covers are removed in connection with operations on the cell and are put back into position when the operations have been completed. In connection with the method in accordance with the present invention, the covers are removed by the total sideways extent of the covers being reduced by the covers being moved together sideways before they are lifted off. The device in accordance with the present invention relates to covering the electrolytic cell, whereby at least one cover is designed with at least one side edge that overlaps an adjacent fixed or movable cover and is mounted with a mutual sideways clearance from the fixed or movable cover stated to allow a certain mutual sideways movement between the covers.

La présente invention concerne un procédé et un dispositif relatifs à une cellule électrolytique du type Hall-Héroult utilisée pour la production d'aluminium. Le procédé consiste à manipuler des couvercles dans une superstructure d'une cellule électrolytique, la cellule comprenant un ou plusieurs couvercles amovibles, montés côte à côte. De tels couvercles sont retirés lors d'opérations effectuées sur la cellule et sont remis en place après achèvement desdites opérations. Selon le procédé de la présente invention, les couvercles sont retirés en réduisant toute la partie latérale des couvercles qui sont déplacés ensemble latéralement avant d'être soulevés. Le dispositif selon la présente invention est lié à la couverture de la cellule électrolytique, au moins un couvercle étant conçu avec au moins un bord latéral qui se superpose à un couvercle adjacent fixe ou mobile et étant monté avec un jeu mutuel sur les côtés par rapport au couvercle fixe ou mobile défini pour permettre un certain mouvement latéral mutuel entre les couvercles.

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