The lattice ball mill is fitted with a bearing inner sleeve and a discharge grid in the end cap with a hollow journal at the discharge end. Discharge lattice by the central liner, lattice liner and dustpan liner and other components. In the inner wall of the end cap is cast with eight radial ribs, the end cap is divided into eight fan-shaped room, in each fan-shaped installation of dustpan-shaped liner, and with screws fixed on the end cover, and then installed in the grid The dustpan liner is formed on each fan-shaped chamber. Lattice liner has two kinds of structural form: one is composed of two synthetic group, pressed by the wedge iron, wedge iron is screwed through the ribs in the end of the cover, the central part of the central liner with the mouth Live, so as not to tilt and fall off; the other is a combination of two pieces, directly with screws. The center liner is star-shaped, it consists of two pieces, with screws fixed on the ribs.