| 摘要 |
<p>Before operating a vacuum degassing apparatus (10) for molten glass which has paths (16,18) for molten glass (G) made of refractory material, fuel is burnt by burners (38,40,50), and the burnt gas is exhausted through an exhaust pipe (34,42) communicating with an upper end of a vacuum degassing vessel (14), thereby raising the temperature of said paths (16,18) made of refractory material and of said exhaust pipe (34,42). The claims define an apparatus and method for the above mentioned start-up procedure, prior to standard refining under reduced pressure in the same apparatus (10) for degassing molten glass. <IMAGE></p> |
