To provide a method and a device capable of accurately sorting even if mixed particles have small particle diameters.
A mixture of particles, which is supplied to a separation space 9, is electrostatically charged, by impressing a high-voltage to a vibrating electrode plate 3a, made inclined at a predetermined angle, and to a needle-shaped electrode 31b placed over the electrode plate 3a through a separation space 6 to discharge ion, and is attracted to the vibrating electrode plate 3a. Then, particles of a conducting material are neutralized by coming into contact with the electrode plate 3a and then are electrostatically charged in homopolarity with the electrode plate 3a. Accordingly, when the electrode plate 3a is vibrated, the particles of the conducting material repelling the electrode plate 3a are hardly influenced by carrying force of vibration and slip down in the dipping direction by gravitaty. Plastic particles attracted and biased to the electrode plate 3a are carried in the carrying direction by the vibration of the electrode plate 3a. Thereby, the plastic particles and the particles of the electric conductor are carried in the different directions and separated.
INOUE TETSUYA
TSUKAHARA MASANORI
MAEHATA HIDEHIKO
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