Bottom masonry structure of bottom blowing hot-metal bottle with spherical bottom and construction method of bottom masonry structure

The invention discloses a bottom masonry structure of a bottom blowing hot-metal ladle with a spherical bottom and a construction method of the bottom masonry structure, the bottom masonry structure comprises a spherical bottom shell, a ladle bottom permanent layer castable, ladle bottom working layer surrounding bricks, ladle bottom working layer castable, air supply bricks and customized grids, and the customized grids are fixed on the inner surface of the spherical bottom shell and are arranged in the horizontal direction; the tank bottom permanent layer pouring material is attached to the inner surface of the spherical bottom shell and can freely penetrate through and completely wrap the customized grid. Two air supply bricks which are arranged at an interval are located on the upper surface of the customized grille, and air supply pipes on the two air supply bricks vertically extend downwards to sequentially penetrate through the customized grille and the spherical bottom shell to be communicated with ex