| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulating structure which blocks the space between an outer surface of a furnace body and outside air to improve the thermal efficiency of a furnace.SOLUTION: In the furnace 20 in which the temperature of the outer surface of the furnace body 22 becomes 130°C or lower, when a treated object is supplied and heated, a heat insulating material 23 is mounted to the outer surface. The heat insulating material 23 is a plate-shaped member, comprises a member including a plate-shaped heat insulating core and noncombustible paper attached to the surface and back face of the heat insulating core, and is mounted by a magnet to cover the approximately entire surface of the furnace body 22 formed of a steel plate. |
