Patent ID: 6318561
Filing Date: 2001-11-20
Classification: B07B

Abstract:
Air classifier for the separation of granular material into three fractions, comprising two motor-driven rotor blade-equipped separator wheels each of which is mounted on one side in a common housing, each with a tangential separating-air intake at the level of the respective wheel and with a guide vane ring which is positioned at a radial distance from the circumference of the wheel, with a bulk material feed intake and with exit ports for the discharge of fine, medium and coarse fractions and with a separation zone through which a stream of the granular material flows along the direction of the longitudinal axis of the wheels, wherein each of the wheels comprises at a first axial end thereof a closed cover disk and at its second axial end with a fine and, respectively, medium fraction discharge port, the wheels having first ends that are spaced from, generally in parallel with, and frontally facing each other and forming a radial flow gap that is open to the stream of granular material for receiving a portion of the stream to flow radially through the gap, wherein the spacing between the first ends of the wheels is adjustable to vary the axial extension of the flow gap.