| 摘要 |
PROBLEM TO BE SOLVED: To increase the strength of a melting furnace and to prevent it from being damaged by inserting a joint-locking material consisting of a ceramic sintered body where bending strength at a specific high temperature is specified between each row of fire-resistance bricks. SOLUTION: A joint-locking material with a bending strength of 6 kg/cm<2> or larger at 1,200 deg.C is inserted between fire-resistance bricks, especially between each row of fire-resistance bricks where the fire-resistance bricks are piled up in a furnace body. The joint-locking material is preferably arranged between a row of fire-resistance bricks and is fixed and is made of a wedge-shaped joint-locking material, thus enabling it to be adapted to a cylindrical wall body and preventing it from falling off. The joint-locking material is, for example 58×115 mm in terms of a flat-plate-shaped square size, and further is in a wedge shape where (a) and (b) are equal to 10 and 15 mm, respectively. Further, by setting the (b) size surface as an insertion tip, the (a) size surface becomes an exposed surface for the inside of a melting furnace. The joint-locking material is made of a ceramic sintered body such as Al2 O3 , SiC, and Si3 N4 .
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