Patent ID: 6202445
Filing Date: 2001-03-20
Classification: C03B

Abstract:
A method for rising temperature of a vacuum degassing vessel, an uprising pipe and a downfalling pipe of a vacuum degassing apparatus for degassing molten glass, the method comprising:providing temperature rising burners which are configured to burn fuel at lower ends of the uprising pipe and the downfalling pipe, respectively, the vacuum degassing apparatus including a vacuum housing containing the vacuum degassing vessel which communicates with the vacuum housing, the uprising pipe being connected to the vacuum degassing vessel to introduce the molten glass into the vacuum degassing vessel, the downfalling pipe being connected to the vacuum degassing vessel to discharge the molten glass from the vacuum degassing vessel;providing an exhaust pipe at an upper end of the vacuum degassing vessel; andoperating the temperature rising burners to burn the fuel to generate burned gas before the vacuum degassing apparatus degasses the molten glass such that the burned gas flows from the lower ends of the uprising pipe and the downfalling pipe to the vacuum degassing vessel and is exhausted through the exhaust pipe.