CONSTRUCTION OF AIR PERMEABLE SOLID WALL FOR CONTINUOUS HEAT TREATMENT FURNACE

PURPOSE:To provide titled construction which is improved in heat transmission efficiency, is provided with high strength to external force and is reduced in installation cost by the constitution wherein the inside of a direct firing nonoxidative furnace is partitioned with air permeable solid walls of a split type provided with supporting frames, etc. CONSTITUTION:The inside of a vertical continuous heat treatment furnace of a direct firing nonoxidative heating type which heats a strip material forming the plural passes guided with hearth rolls 11 by means of heaters 12 is partitioned with air permeable solid walls 4 facing the material 1, and a combustion gas is flowed through the walls to heat the material 1 efficiently with the solid radiation heat. The walls 4 are made into a split type, and supporting members 2 consisting of metallic pipes having horizontal refractory materials in the furnace are provided in the furnace. Protectors 3-1 of heat resisting steel having heat insulating materials are disposed at prescribed intervals in the longitudinal direction of said members to support the walls 4. Supporting frames 6-1 and cushion materials 5 are disposed between the members 2.