Abstract: Apparatus for separating particles contained in threshed leaf tobacco includes a plurality of separating chambers, each including a separation chamber and having a fan system for establishing a generally upward air flow. A covered, high speed conveyor of projects the tobacco across the upward flow of air in each chamber in conjunction with additional make up air from the covered, high speed conveyor. Lighter particles of tobacco are carried upward and exit the chamber via a separating mechanism. Heavier particles of tobacco fall onto an integral conveyor and are discharged from the chamber onto another covered, high speed conveyor connecting it to the next chamber. The separating chambers are mounted in line in a configuration to suit the tobacco being processed.