초록 ▼

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

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.

대표청구항 ▼

[ We claim:] [1.] 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

[ We claim:] [1.] 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, and the molten glass is degassed in a state that a bubble layer is formed on a molten glass surface, the vacuum vessel being provided with a barrier having a width traversing an entire width of the vacuum vessel at a side of said downfalling pipe with respect to a center of the vacuum vessel, said barrier blocking bubbles produced on the molten glass surface and a flow of the molten glass just below the molten glass surface during said degassing step; anda discharging step for discharging the molten glass after degassing from the vacuum vessel through a downfalling pipe to a storage vessel.