Hot-stuffy pool steel billet repairing and mounting method

The invention belongs to the technical field of metallurgical solid waste treatment, and discloses a hot-stuffy pool steel billet repairing and mounting method. The hot-stuffy pool steel billet repairing and mounting method comprises the following specific steps that an old steel billet needing to be replaced in a hot-stuffy pool is taken down, and meanwhile, an old bolt and an old screw which are fastened by the steel billet are taken down; an old refractory layer between the old steel billet and the concrete pool wall is stripped; a new steel billet is mounted in the hot-stuffy pool through a new screw and a new bolt, and a fireproof layer space is reserved between the new steel billet and the inner wall of the hot-stuffy pool; new refractory mortar is poured into a refractory layer space between the new steel billet and the inner wall of the hot-stuffy pool; and a sealing plate is welded between the new steel billet above the new refractory mortar and the hot-stuffy pool. A steel plate is used for welding