The air flow carries the powders into the sorting cavity and are separated by the windscreen, the fine particles are separated in the sorting area by the strong centrifugal force generated by the high-speed rotation and the centripetal force generated by the rear of the sorter. The fine particles are discharged from the fine discharge port due to centrifugal force, the coarse particles are discharged from the coarse particle discharge port due to the large centrifugal force. Steel wear protection, applicable for Mohs hardness less than 7 and high abrasive, high hardness impurities of soft materials, such as marble, calcite, quartz limestone, ilmenite, apatite and so on. It has been proved by users that this machine has excellent performance, high technical content, mechatronics, high efficiency and energy saving, and remarkable economic benefits.