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    • 70. 发明专利
    • VACUUM DEFOAMING DEVICE FOR MOLTEN GLASS
    • JP2000086249A
    • 2000-03-28
    • JP25242198
    • 1998-09-07
    • ASAHI GLASS CO LTD
    • TAKEI YUSUKEKAWAGUCHI TOSHIYASUKIJIMA SHUN
    • C03B5/20C03B5/225
    • PROBLEM TO BE SOLVED: To maintain mechanical strength, to maintain and improve the life of a flow passage of molten glass, which is formed by a vacuum defoaming vessel, a riser and a downcomer, and to improve production efficiency by constituting a portion of this flow passage by using a refractory furnace material having a thermally sprayed surface thermally sprayed with platinum or platinum alloy as one surface in such a manner that the portion in direct contact with the molten glass is formed as the thermally sprayed surface. SOLUTION: The flow passage surface of the entire surface of the flow passage surface of the riser 16 and the downcomer 18 and the vacuum defoaming vessel 14, with which surface and the molten glass G comes into contact, is formed of the thermally sprayed surface 40 of the platinum or the platinum alloy. The refractory furnace material is preferably the furnace material produced by one kind of refractory materials, such as alumina-base electroforming refractories zirconia-base electroforming refractories and alumina- zirconia-silica-base electroforming refractories. The thickness of the platinum or the platinum alloy of the thermally sprayed surface is formed to a thickness of >=0.05 to