The utility model provides a
boron carbide micro
powder sorting device which comprises a sorting box supported on the ground through a fixing frame, a smashing
assembly and an auxiliary discharging
assembly are arranged in the sorting box, a concave
sieve tray is fixedly installed on the inner wall of the sorting box, and the smashing
assembly comprises a hollow rotary drum, an end face
cam and a sliding rod. The hollow drum is rotationally connected to the lower surface of the top of the sorting box, the end
cam is fixedly mounted on the lower surface of the top of the sorting box, and the sliding rod is longitudinally and slidably matched with the inner wall of the hollow drum; through the arrangement of the end face
cam, the sliding rod and the
grinding rod can rotate along with the hollow rotary drum and can slide up and down along the inner wall of the hollow rotary drum by utilizing the shape characteristic of the end face cam, so that the distance between the
grinding rod and the concave
sieve tray is continuously changed; therefore, on one hand,
grinding can be carried out while agglomerated
boron carbide micro
powder can be scattered, and on the other hand, arrangement of a power source and wiring harnesses is reduced, and the structure of the device is optimized.