| 摘要 |
In a composite sorting apparatus comprising a drum electrode (4), needle-shaped electrodes (5), and a plate-shaped electrode (9) to separate a mixture (A) of a copper wire (A2) and plastic pieces (A1) into the copper wire (A2) and the plastic pieces (A1), the plurality of needle-shaped electrodes (5) are arranged so that the interval X(cm) between discharge sections (5a) of the adjacent needle-shaped electrodes (5) with respect to the distance L1(cm) from the tips of the discharge sections (5a) to the drum electrode (4) meets 0<X/L1<=3. Further, the discharge sections (5a) are each formed so that an area formed on the drum electrode (4) and to which corona ions are applied has a diameter three times as large as the distance L1(cm). Furthermore, a voltage (V1) applied between the needle-shaped electrodes (5) and the drum electrode (4) is set to meet 0.5 (kV/cm)<=V1/L1<=10 (kV/cm).
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