Classified screening device for brown fused alumina abrasive

The utility model discloses a grading screening device for brown fused alumina abrasive materials, which comprises a sound insulation box body, a fixed plate is arranged on the bottom surface of the inner side of the sound insulation box body, a movable plate is connected above the fixed plate through a spring, a first screen is obliquely arranged at the top end of the movable plate, and one end of the first screen is hinged on the sound insulation box body. A left grading screening mechanism and a right grading screening mechanism are symmetrically arranged on the left side and the right side of the movable plate and are the same in structure, a vibration motor is arranged on the movable plate, a feeding hopper is arranged on the upper side of the sound insulation box and located above the first screen, and a dust removal mechanism is arranged below the sound insulation box. Material receiving mechanisms are arranged on the outer sides of the left grading screening mechanism and the right grading screening m