Methods for in-situ formation of slots in a soderberg anode

C - Chemistry – Metallurgy – 25 – C

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C25C 3/12 (2006.01)

Patent

CA 2619085

A self-baking, Soderberg type carbon anode (40) for use in an aluminum electrolyses cell (1) to form product aluminum (11), where the anode (40) is consumable in molten electrolyte (12) in the cell, the anode having top, bottom and side surfaces and multiple layers of vertically disposed plate inserts (48) meltable in the molten electrolyte, the plate inserts (48) preferably made of aluminum and are capable of melting to create hollow slots (52) at the bottom of the anode facilitating any gas bubbles (60) generated to channel to the side of the anode into the electrolyte (12).

L'invention concerne une anode (40) de carbone à auto-cuisson de type Soderberg que l'on utilise dans une cellule à électrolyse d'aluminium (1) pour former de l'aluminium en produit (11), l'anode (40) étant consommable dans l'électrolyte (12) en fusion dans la cellule. L'anode présente des surfaces supérieure, de fond et latérales et plusieurs couches de plaques rapportées (48) posées verticalement pouvant fondre dans l'électrolyte en fusion. Lesdites plaques rapportées, de préférence en aluminium, peuvent fondre de façon à créer des fentes creuses (52) sur le fond de l'anode, et les éventuelles bulles de gaz (60) générées peuvent aisément être canalisées du côté de l'anode dans l'électrolyte (12).

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