METHOD FOR CONTROLLING FOAM FORMED IN REDUCED PRESSURE FINING

METHOD FOR CONTROLLING FOAM FORMED IN REDUCED PRESSURE FINING

PROBLEM TO BE SOLVED: To provide a method for efficiently control the foam produced when a molten material encounters the pressure reduction in a vacuum chamber with regard to reduced pressure fining, a method for removing trapped bubbles in molten material, e.g., molten glass. SOLUTION: The method...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MURNANE RAND A, WOOLLEY FRANK, HAYES JAMES C, PALMQUIST RONALD W
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for efficiently control the foam produced when a molten material encounters the pressure reduction in a vacuum chamber with regard to reduced pressure fining, a method for removing trapped bubbles in molten material, e.g., molten glass. SOLUTION: The method comprises flowing the foam 45 produced when the molten material encounters the pressure reduction in a vacuum chamber 24 from the vacuum chamber to a foam chamber 68, flowing out the molten material between the air bubbles of the foam, and breaking the air bubbles of flowing out foam of the molten material by a froth breaking means 54. COPYRIGHT: (C)2009,JPO&INPIT