Novel flat-hole high-alumina brick

The utility model discloses a novel flat-hole high-alumina brick, which belongs to the field of high-alumina bricks, and is characterized in that two sides of a brick body are provided with corresponding mounting lug seats and mounting lug holes, so that two adjacent high-alumina bricks have tensile forces in the transverse direction and the longitudinal direction, and when one high-alumina brick needs to be dismounted and replaced, the two adjacent high-alumina bricks can be conveniently dismounted and replaced by the mounting lug seats and the mounting lug holes. A supporting mechanism does not need to be installed on the top of the high-alumina brick to be dismantled and replaced, replacement is more convenient, the formed heat transfer through holes are directly communicated with the interiors of the strip-shaped flat holes, high-temperature flue gas can conveniently and directly enter the strip-shaped flat holes for heat storage, the heat transfer efficiency is improved, sealing plates on the heat transf