Expanded perlite separating device

The utility model discloses an expanded perlite separating device which solves the technical problems that a separating device in the prior art is complex, low in separating speed and poor in separating effect. The material sorting device comprises a feeding bin (1), a frequency conversion fan (2), a material sorting air pipe (3), supporting legs (4), a base (5), a first discharging opening (6) and a second discharging opening (7). Wherein supporting legs (4) are arranged below the sorting air pipe (3), the supporting legs (4) are welded to the base (5), the feeding bin (1) is arranged above the sorting air pipe (3), one end of the sorting air pipe (3) is connected with the frequency conversion fan (2), and a first discharging port (6) and a second discharging port (7) are formed in the lower portion of the sorting air pipe (3). According to the device disclosed by the utility model, particles with different volume weights form different drop points under the action of a certain wind speed in a winnowing mode