Mining grader

The utility model discloses a mining grading machine in the technical field of machine-made sand, which comprises a winnowing mechanism and a grading mechanism, the multiple air inlets are annularly formed in the bottom of the outer side wall of the circumference of the pipe body, and inner cavities of the air inlets communicate with an inner cavity of the pipe body; the upper end cover assembly is mounted at the top opening of the winnowing mechanism; the lower end cover assembly is mounted at the bottom opening of the winnowing mechanism; the spiral screening mechanism is installed at the end, away from the winnowing mechanism, of the lower end cover assembly. The spiral conveying mechanism is installed on the end face of the spiral screening mechanism. According to the device, the water content of gravel can be effectively reduced, the later dehydration procedure is omitted, and the gravel preparation efficiency is improved. 本实用新型公开了机制砂技术领域的一种矿用分级机，包括：风选机构，所述风选机构包括：管体；多个进风口，多个所述进风口呈环形设置在所述管体的圆周外侧壁的底部，所述进风口