Screening machine for brown fused alumina production

The utility model relates to the technical field of brown fused alumina production and processing machinery, in particular to a screening machine for brown fused alumina production. The screening machine comprises a rack and a screening device arranged on the rack. A discharging device is arranged at the upper end of the screening device; a damping device is arranged between the screening device and the rack; the screening device comprises a vibration motor arranged on the rack; the vibrating screen comprises a vibrating motor, a vibrating support connected with the vibrating motor, a screen frame connected with the vibrating support, and a metal screen detachably connected in the screen frame, the metal screen divides the screen frame into an upper screening space and a lower screening space, a coarse material outlet is formed in the upper screening space, and a fine material outlet is formed in the lower screening space. By means of the structural arrangement, the brown fused aluminascreening device is simp