Carbon electrode with gastight, temperature stable...

C - Chemistry – Metallurgy – 25 – C

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204/185, 204/198

C25C 3/00 (2006.01) C25C 3/24 (2006.01) C25C 7/02 (2006.01)

Patent

CA 2003154

A carbon electrode surrounded by a protective globe in a fusion refining electrolysis process. The protective globe is self-supporting, gastight and thermally stable. The protective globe is spaced from the carbon electrode by a predetermined distance. Also, there is a predetermined distance between an end of the carbon electrode to be immersed in a melting bath and an open end of the protective globe through which projects the carbon electrode. A preheating process requires the electrode to be initially preheated over the melting bath, then its exposed end is immersed into the melting bath while not immersing the protective globe, and finally immersing both the electrode and the protective globe.

Electrode de carbone entourée d'un globe protecteur utilisée lors du procédé électrolytique de raffinage par fusion. Le globe protecteur est autoporteur, étanche aux gaz et thermostable. Il est éloigné de l'électrode de carbone d'une distance prédéterminée. Une distance prédéterminée sépare également l'extrémité de l'électrode de carbone qui doit être plongée dans un bain de fusion et l'extrémité ouverte du globe protecteur par laquelle fait saillie l'électrode de carbone. Une opération de préchauffage nécessite que l'électrode soit chauffée au préalable au-dessus du bain de fusion; son extrémité exposée est ensuite plongée dans le bain de fusion pendant que l'ampoule protectrice ne l'est pas, et finalement, l'électrode comme le globe protecteur sont immergés.

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