Glass manufacturing – Processes – Fining or homogenizing molten glass
Patent
1996-11-20
1998-12-15
Silverman, Stanley S.
Glass manufacturing
Processes
Fining or homogenizing molten glass
65 325, 651349, 651352, 651353, 65178, 65346, 65347, C03B 5225
Patent
active
058490582
ABSTRACT:
A refining method for molten glass comprising a stirring step for stirring molten glass in a stirring vessel, a feeding step for feeding the molten glass into a vacuum vessel via an uprising pipe, a degassing step wherein the molten glass is put under a reduced pressure in the vacuum vessel, bubbles produced on the molten glass surface and a flow of the molten glass just below the molten glass surface are blocked by a barrier provided in the vacuum vessel, and the molten glass is degassed in a state that a bubble layer is formed on the molten glass surface, and a discharging step for discharging the molten glass after degassing from the vacuum vessel through a downfalling pipe to a storage vessel.
REFERENCES:
patent: 1598308 (1926-08-01), Pike
patent: 3321300 (1967-05-01), Worner
patent: 3519412 (1970-07-01), Olink
patent: 4994099 (1991-02-01), Boettner
patent: 5316563 (1994-05-01), Ishimura et al.
Proceedings of the XVI International Congress on Glass--Oct. 4-9 1992, vol. 6, pp. 173-178, S. Takeshita, et al., "Refining of Glasses Under Subatmospheric Pressures".
Ishimura Kazuhiko
Takeshita Shinji
Tanaka Chikao
Asahi Glass Company Ltd.
Silverman Stanley S.
Vincent Sean
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