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US 6,202,445 B1Granted
Vacuum degassing apparatus for molten glass and method to rise vacuum degassing apparatus temperature
AssigneeAsahi Glass Company, Limited
InventorsMitsuo Sugimoto, Shigekuni Inoue, Takashi Iketani, Hiroshi Kurata, Yasuharu Hirabara
Life of this patent
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Abstract
Before operating a vacuum degassing apparatus for molten glass which has paths for molten glass made of refractory material, fuel is burned by temperature rising burners, and the burned gas is exhausted through an exhaust pipe which communicates to an upper end of a vacuum degassing vessel.
Claims3
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;
- and
- operating 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.
1 more element
Dependencies are inferred from the claim text.