Structure, device for manufacturing float glass, method for restraining bubbles from emerging and method for manufacturing float glass

摘要

A porous structure 12, which is disposed so as to be immersed in molten metal 16 contained in a vessel 14 and is made of a material having no affinity with the molten metal 16, comprises a hollow passage 42 formed therein so as to communicate with an atmospheric environment, wherein a gas, which is produced on an outer surface of the structure in contact with the molten metal, is directed into the hollow passage 42, whereby the gas is restrained from rising as bubbles on the outer surface of the structure 12.