Sifting apparatus

摘要

A sifting apparatus for stratifying raw material includes a material feed-in device, a material support unit, a gas plenum, and a discharge control device. The material support unit receives material from the material feed-in device and has a surface having a plurality of openings for a gaseous medium introduced from underneath the material support unit, thereby effecting loosening and stratification of the material into a layer of relatively heavier material, and a layer of relatively lighter material atop the heavier material. The introduced gaseous medium originates in a pump, is collected in a pressurized reservoir and is controlled by a metered valve prior to introduction to the material support unit.

主权项

1. A sifting apparatus, comprising:
a material support unit being provided with only a pulsating gaseous medium flow; a plenum attached to an underside of the material support unit; a metering device in communication with the plenum and the material support unit, the metering device providing the pulsating gaseous medium flow to the material support unit; a pump in communication with the metering device, wherein the pump provides a pressurized medium; a reservoir that maintains a threshold pressure, the reservoir being positioned between the pump and the metering device; and a discharge control in communication with the material support unit and operable to control discharge of a relatively heavier material.