| 摘要 |
<p>The invention concerns a core-type furnace whereof vertical sectors (20) of a crucible lateral wall are assembled at a position adjustable and invariable by screws (36) engaged in internal threads of a flange (34) common to all the sectors, thereby producing an accurate assembly which does not give rise to internal deformation or stresses. The sectors are coated with a ceramic layer to protect them and prevent electric arc formation. The ridges joining the surfaces (28, 29) are rounded for similar effect. The water boxes for cooling the furnace lower hearth are similarly constructed. The invention is applicable to vitrification techniques.</p> |
