Hearth for continuous annealing furnace and continuous annealing furnace

摘要

PROBLEM TO BE SOLVED: To provide a hearth capable of preventing the generation of particulate foreign materials more than 45 μm in size while having no moisture evaporation and including a load bearing function.SOLUTION: A hearth 1 comprises: metal plates 5 sequentially arranged from a furnace inside; and a plurality of inorganic fiber blankets, In the hearth, the inorganic fiber blankets are arranged and laminated in parallel with a hearth surface; the bulk density of the inorganic fiber blanket is 0.18 to 0.23 g/cm; the moisture content of the inorganic fiber blanket is 1% or less; the metal plates are fixed to an outer steel shell 2 with stud bolts 6; the top layer of the inorganic fiber blankets is an alumina fiber blanket 4 more than 45 μm in size having a shot percentage content of 2% or less; and lower layers thereof are a plurality of ceramic fiber blankets 3.SELECTED DRAWING: Figure 1