FURNACE MATERIAL FOR REDUCED PRESSURE DEFOAMING DEVICE OF MOLTEN GLASS AND REDUCED PRESSURE DEFOAMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a furnace material for a reduced pressure defoaming device for molten glass which is capable of subjecting a large amt. of the molten glass to reduced pressure defoaming treatment and is applicable to a large-sized glass melting furnace forming furnace and a device therefor. SOLUTION: The furnace material of at least the part in direct contact with the molten glass of the flow passage 40 of a reduced pressure defoaming vessel among a riser 16 housed in a reduced pressure casing, the reduced pressure defoaming vessel 14 for executing the molten glass 8 to the reduced pressure defoaming treatment and a downcomer 18 is formed of refractories having a porosity of <=5%. The refractories are preferably electroformed refractories or densely fired refractories.