Method and means for determination of particle size distributions in a mass flow of a granular material

摘要

Method and means for determining the particle size distribution in a flow of granular material in the particle size range of 1 &mgr;m to several millimeters by introducing into a constant velocity stream of a carrier medium, preferably transversely thereof, a stream of the material to be analyzed, said introduction being effected at a constant velocity within a measuring time period, and the velocities of said two streams being so coordinated as to cause the individual particle size classes to be carried along separate particle paths in a fan-shaped pattern while being subjected to an electromagnetic radiation, and determining the particle quantities corresponding to the individual particle size classes in the fan-shaped stream of material from the extinction or absorption of said electromagnetic radiation.