Multi-stage screening machine for processing concentrate through raw ore waste throwing

The invention discloses a multi-stage screening machine for processing concentrate through raw ore waste throwing, and relates to the technical field of raw ore waste throwing processing. The device comprises a base, an outer shell and a feeding assembly are arranged at the top of the base, and a screening assembly is arranged on the inner side of the outer shell through a rotating assembly; the rotating assembly comprises a rotating frame, a rotating shaft and an electric push rod. The rotating shaft and the electric push rod are arranged at the two ends of the rotating frame correspondingly. The screening assembly comprises a fixed frame, a screening plate and a fastening bolt, the fixed frame is provided with the screening plate through a second mounting groove, and the fixed frame is fixed in the rotating frame through the fastening bolt; the feeding assembly comprises a feeding shell, a resistance wire and a fan, and the resistance wire and the fan are arranged on the feeding shell through a mounting fra