Glass melting

C - Chemistry – Metallurgy – 03 – B

Patent

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307/1, 49/77

C03B 5/03 (2006.01) C03B 3/02 (2006.01) C03B 5/04 (2006.01) C03B 5/185 (2006.01) C03B 5/20 (2006.01) C03B 5/225 (2006.01) C03B 5/24 (2006.01)

Patent

CA 2018740

A glass melting tank has a melting chamber, a shallow uniflow conditioning chamber, a shallow refining chamber and a riser chamber between the melting chamber and refining chamber. Heat is input to glass in the riser chamber by electrodes located centrally in the riser chamber near the base of the riser chamber. Temperature sensors sense the temperature entering the riser chamber through a throat and near the base of a downstream wall of the riser chamber and the heat input is controlled to produce torroidal flow in the riser chamber.

Cette invention concerne une cuve de fusion de verre composée d'une enceinte de fusion, d'une enceinte peu profonde de conditionnement à flux continu, d'une enceinte peu profonde d'affinage et d'une colonne montante entre l'enceinte de fusion et l'enceinte d'affinage. Le verre fondu est chauffé dans la colonne montante par des électrodes centrées près de la base de celle-ci. Des capteurs de température déterminent la température du verre fondu pénétrant dans la colonne montante par un étranglement ainsi que sa température près de la base du muret aval de ladite colonne, et l'apport de chaleur est réglé de manière à induire dans cette colonne un flux toroïdal.

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