GRAIN SORTING METHOD, AND DEVICE THEREFOR

PROBLEM TO BE SOLVED: To provide a grain sorting method which sufficiently attain the sorting and removal of fine dust and the prevention in the scattering and floating thereof precedingly without being restricted by the sorting capacity of coarse foreign matter, and also can effectively sort and remove foreign matters, and to provide a device therefor. SOLUTION: The grain sorting device 1 is composed of: a preceding fine dust removal treatment part 2 sorting fine dust intermingled in the grains to be sorted by wind force; and a succeeding coarse foreign matter removal treatment part 3 separating and exhausting coarse foreign matter from the grains to be sorted freed of the fine dust in the preceding fine dust removal treatment part 2. The succeeding coarse foreign matter removal treatment part 3 is provided with: a tilted porous sorting board 18; a flexible porous scattering preventive sheet 19 covering the upper face of the tilted porous sorting board 18; and an electric oscillating machine 23 oscillating the tilted porous sorting board 18. COPYRIGHT: (C)2010,JPO&INPIT