AIR TWO-PRODUCT CLASSIFIER Russian patent published in 2011 - IPC B07B4/02 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to air two-product classifier and may be used in construction, chemical dressing industries etc., to size loose materials to coarse and fine fractions. Proposed classifier comprises classification shaft 1 with side wall holes 2. Top cylindrical part of said shaft has initial material feed branch pipe 4 and external branch pipe 5 to discharge fine fractions together with airflow, branch pipe 6 to discharge coarse fraction arranged at classification shaft bottom, taper distributor 8 of initial material arranged below branch pipe 4, and casing 9 with branch pipe 10 to feed air that embraces classification shaft. Classification shaft bottom features conical shape and comprises appliances 3 to discharge material therefrom, regularly arranged along its entire inner surface.

EFFECT: higher efficiency of classification due to separate discharge of fine and coarse materials.

2 dwg