Castable refractory

A kiln, comprising a plurality of sections, the sections lined with a refractory lining of a castable refractory and having a compressible fire-resistant material applied between adjacent sections, the castable refractory comprising:

• at least one of 2 to 10 mass % of silicon carbide and 3 to 10 mass % of chamotte, as an auxiliary raw material, and a binder material, with a balance of one or more main raw materials selected from the group consisting of corundum, mullite, bauxite, talc and silica;
• the refractory lining having a vitrified layer produced as a surface layer, the surface layer having a thickness of 30 μm to 1 mm;
• and
• wherein the preset expansion allowance of each section is in the range of the following formula (1) with respect to the theoretical expansion (D) of said refractory at the service temperature:
• 0.5
• ×
• D
• ≤
• pA
• +
• ∑
• i
• =
• 0
• n
• ⁢
• Bi
• ≤
• 2
• ×
• D
• (
• 1
• )
• A:
• the distance to the adjacent section,
• p:
• the percentage compressibility of the compressible fire-resistant material,
• Bi:
• the length in the width direction of a cut line provided at least on the in-furnace side of the castable refractory constituting the section,
• D:
• the theoretical expansion of the castable refractory at the service temperature, and
• i and n:
• an integer of 0 or more.