| 摘要 |
PURPOSE:The base material which forms the outer structure of the trough is provided, on its inner surface, with an insulating layer, a specific heat- generating layer and a protecting layer, so that the slag is prevented from solidifying in the inner surface of the trough and rock wool of high quality is obtained without coating. CONSTITUTION:The base I of a heat-resistant material such as iron in lined with a fire-proofing material such as ceramic fibers in its inner surface to form an insulating layer 2, the layer 2 is provided on its inner surface, with a heat-generating layer 3 which is prepared by embedding electric heaters 5 in a refractory material such as high alumina castable refractory, further, a protecting layer 4, which contacts with the slag is formed with a heat-resistant, corrosion-resistant material such as carbon plates on the heat-generating layer 3. As a refractory for the insulating layer 2, are cited silica fiber, alumina fiber carbon fiber in addition to ceramic fiber and silicon carbide or high alumina is used as a heat-resistant, corrosion-resistant material for the protecting layer 4.
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