Device for refining a glass melt comprises a negative pressure apparatus with a riser pipe, downpipe and/or refining bench having a component made from a refractory metal alloy as the glass contact material

摘要

Device for refining a glass melt (2) comprises a negative pressure apparatus in which the melt is fed to a refining bench using a riser pipe and is discharged from the bench using a downpipe so that a negative pressure is created over the flow of glass in the bench. The riser pipe, downpipe and/or refining bench have/has a component (1) made from a refractory metal alloy as the glass contact material. Preferred Features: The component is made from Mo, W, Ta or Hf or their alloys and is protected from oxidation by the melt by rinsing with a protective and/or forming gas or by vitrifying. The device also contains a heating body (5).