A method and device for separating particulate material.

摘要

A method of separating particulate material of differing size or density including the steps of: tumbling the particulate material to produce continuous or discrete avalanches ( 19 ) in the surface of the particulate material to move particles of smaller size ( 14 ) or higher density ( 22 ) towards the centre of the particulate material and particles of larger size ( 16 ) or lower density ( 24 ) radially outward from the centre of the particulate material; and extracting particles at selected radial locations ( 8, 10 ). A device for separating particulate material of differing size or density is also provided.