| 摘要 |
PURPOSE:To surely and simply classify and recover plastic by kinds. CONSTITUTION:Plastic materials Pa, Pb, Pc, Pd having magnetic matters mixed therewith in predetermined concns. specifying kinds are ground to be fed to the magnetic separators 30 of a classifier 10. Two or more magnetic separators 30 having magnets different in magnetic force are arranged so that the magnetic forces of the magnets are min. on the upstream side in the feed direction of the plastic materials and successively increased toward the downstream direction to become max. on the most downstream side. The plastic material Pa having the max. amount of magnetic matter mixed therewith is attracted and recovered by the first magnetic separator 30. Further, the plastic materials are successively attracted and recovered by the magnetic separators 30 arranged on the downstream side on the basis of the relation between the contents of the magnetic matter in the plastic materials and the magnetic forces thereof. |
