| 摘要 |
<p>A heat insulating board of an induction heating apparatus disposed inside an induction heating coil and shielding a radiant heat from a heated material fed through the inside of the induction heating coil, comprising a cooling tube formed with high heat conductive monothilic refractory with a heat conductivity of 5 W/(m °C) or higher and a closed in the monothilic refractory, whereby deformation and damage resulting from heat can be reduced remarkably.</p> |
