Combined classifier

摘要

A combined classifier includes an outer cylinder (1) and an inner cylinder (2) fixed in the outer cylinder (1). A classifying motor (3) is mounted on the upper end of the outer cylinder (1) by a bracket. The lower end of the ouput shaft of the classifying motor (3) is fixedly connected with a rotating shaft (4) which extends into the inside of the outer cylinder (1). The lower end of the rotating shaft (4) is provided with a classifying impeller (5) which is above the inner cylinder (2). A feeding inlet (9) is set on the outer housing above a scatter plate (8), and a dicharging outlet (10) is provided on the lower end of the outer cylinder(1). A cone-shaped discharging hopper (11) is set on the lower end of the inner cylinder (2), and the side wall thereof is provided with sieve openings. The discharging hopper (11) is communicationally connected with an air classifier (12). The combined classifier is provided to scatter and classify the materials squeezed by a roll squeezer, thereby separating the materials that are not squeezed or not fully squeezed by the combination of air classification and screen sizing, and conveying the materials back to the roll squeezer to re-squeeze, so that the classifying efficiency can be improved.