Furnace, refractory installing method, and refractory block

A refractory installing method for lining refractories with an inside surface of a steel shell of a cylindrical furnace, where a refractory includes hexagonal cone trapezoid refractory blocks and half-blocks that have a shape obtained by dividing the refractory blocks, the method comprising:

• using a refractory block which includes a hot-face end surface which has a hexagonal shape and a cold-face end surface which has a hexagonal shape larger than the hot-face end surface, and the refractory blocks are formed such that two surfaces among the six surfaces present at a barrel portion surface are trapezoid shapes that expand from the hot-face end surface toward the cold-face end surface and the facing surfaces are parallel;
• using half-blocks which include a block shape made by cutting the refractory blocks so that the hot-face end surface and the cold-face end surface are each equally divided into two trapezoids at surfaces that are parallel to the two trapezoid surfaces of the barrel portion surface;
• including, in the refractory block, a block arrangement jig having a metallic plate that is provided on only the hot-face end surface of the refractory block and directly fixed to the hot-face end surface of the refractory block by both an adhesive and a bolt, and a metallic grip that is provided on a surface of the metallic plate and extends from a substantially center portion of the surface of the metallic plate to an inside in the radial direction of the furnace, the metallic grip being straight shaped;
• arraying a plurality of the refractory blocks such that each position of the hot-face end surface is positioned along the radial direction of the furnace is aligned with a predetermined reference position;
• stacking the plurality of refractory blocks along the circumferential direction of the steel shell inner surface and the trapezoid face of the barrel portion surface faces a direction perpendicular to the axial direction of the cylindrical body of a furnace in a honeycomb manner;
• and
• arraying, at the bottom portion of the steel shell of the cylindrical furnace when stacking, a plurality of half-blocks at predetermined intervals along a circumferential direction such that the end surface shape form a trapezoid in which the lower base is longer than the upper base, disposing the refractory blocks so as to fit between half-blocks, stacking the refractory blocks in a honeycomb manner, and at the top of the steel shell of the cylindrical furnace, arraying in plurality half-blocks so as to form a trapezoid in which the end surface shape is longer at the upper base than the lower base,
• wherein before the arraying and the stacking, the metallic plate of the block arrangement jig is directly fixed to the hot-face end surface of the refractory block, the block arrangement jig and the refractory block are fixed together, and the whole cold-face end surface of the refractory block is exposed, and in the arraying and the stacking, the refractory blocks to which the block arrangement jig is fixed in a cantilever manner are lifted and installed by grasping the metallic grip.