Process for producing glass and glass-melting apparatus thereof
AssigneeHoya Corporation
InventorsKazuo Ogino, Jun Ichinose, Yasuko Katoh, Rieko Kudo
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Abstract
A process for producing a high-quality glass from highly reactive raw materials and a glass-melting apparatus for use therewith, comprising the step of charging a material for the glass to a molten glass in a heated vessel, (1) wherein an oxidizing gas is bubbled in the molten glass and a glass raw material that behaves as a reducing agent during being melted is charged into a position of the bubbling or (2) said vessel is filled with a dry ambient gas and while the ambient gas is allowed to flow to a liquid surface of the molten glass along an charging route of the glass raw material, the glass raw material is charged.
Claims8
A glass-melting apparatus for obtaining a molten glass by charging a glass raw material and heating the glass raw material to melt it, the apparatus comprising, as essential elements, a vessel for heating and melting a glass raw material and for preserving an obtained molten glass, a raw material charging port provided in communication and contact with the vessel, an ambient gas supply port for supplying a dry ambient gas to fill the vessel therewith, and an ambient gas discharge outlet for discharging said ambient gas, the vessel having an inside that is divided to form an ambient gas passage that leads from the ambient gas supply port to a liquid surface of the molten glass along a glass raw material charging route and reaches the gas discharge outlet.
Dependencies are inferred from the claim text.