HIGH-TEMPERATURE HEAT-RESISTANT MATERIAL AND FURNACE MATERIAL FOR HIGH-TEMPERATURE FURNACE AND HEAT-RESISTANT PROTECTING TUBE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a high-temperature heat-resistant material capable of providing excellent heat and corrosion resistances and resultantly usable over a long period. SOLUTION: Furnace materials 6 and 9 constituting a furnace wall, or the like, in a high-temperature furnace such as a smelting furnace 1 for a metal or a slag are composed of a sintered compact comprising a polycrystal of MgAl2 O4 and/or Al2 O3 and containing =5 wt.% (without including 0) of a glass component such as SiO2 , CaO, Na2 O or Fe2 O3 or comprising a polycrystal of MgAl2 O4 and/or Al2 O3 and prepared by further adding Cr2 O3 or CeO2 in an amount of 3-90 wt.% thereto.