Melting furnace having cullet preheating and rear crown vent...

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 3/00 (2006.01) C03B 5/04 (2006.01)

Patent

CA 2335145

A glass melting furnace (10) that simultaneously preheats and removes volatile substances from glass making material being intro-duced into the furnace (10). The glass making material, consisting of cullet and scrap glass, is intro-duced on a shelf (68) located at a rear portion of the furnace (10). A vertically-oriented crown vent (34) is also located at the rear portion of the furnace (10). The shelf (68) is at such an elevation above the glass line (14) to allow sufficient time for the cutlet and scrap glass to be heated by the exhaust gases exit-ing through the crown vent (34). The furnace burners (44) also ox-idize the binder and other organic materials in the scrap glass. The furnace (10) also includes a crown vent support system that indepen-dently supports the refractory stack (74) such that the refractory stack (74) can be repaired or replaced while the furnace (10) is operating.

La présente invention concerne un four de fusion (10) de verre qui, simultanément, préchauffe et élimine des substances volatiles contenues dans la matière première introduite dans le four (10). La matière première, qui consiste en calcin et déchets de verre, est introduite sur une plaque (68) placée à la partie arrière du four (10). Une ventilation de voûte (34), orientée verticalement, est aussi placée à la partie arrière du four (10). La plaque (68) se trouve à une hauteur suffisante, au dessus de la surface du verre (14), pour donner au calcin et aux déchets de verre le temps d'être préchauffés par les gaz qui s'échappent à travers la ventilation de voûte (34). Les brûleurs (44) du four permettent d'oxyder le liant et d'autres matières organiques contenus dans les déchets de verre. Le four (10) comprend aussi un système de support de ventilation de voûte qui supporte de manière indépendante le bloc réfractaire (74), de façon à ce que ce bloc puisse être réparé ou remplacé pendant le fonctionnement du four (10).

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