To provide an electrification sorting apparatus which can sort a constitutional material of a mixture with higher purity.
The mixture of a material piece A and a material piece B is charged with a frictional electrification sorting apparatus 2a of a material A, and then a first material to be sorted and a second material to be sorted are sorted from the mixture by the electric field between a counter electrode 41a, 42a. And thereafter, the second material to be sorted, which contains more material pieces B than the material piece A, is charged with a frictional electrification sorting material 2b of a material B, and then a third material to be sorted and the fourth material to be sorted are sorted from the second material to be sorted by the electric field between a counter electrode 41b, 42b. Two-step sorting is carried out for the mixture containing the material piece A and the material piece B, and also a material of a part having the electrification function of the first and the second electrification apparatus is selected according to the electrification property of a constituent material of the mixture. Accordingly, the highly-purified sorted material of the first and the second material is easily obtained as the electrification of the material piece A and the material piece B in the first and the second electrification apparatus is promoted. Therefore, the electrification sorting apparatus possible to sort the constituent material of the mixture with higher purity.
MUKUDA MUNEAKI
MATSUO YUICHI
Yoshitake Hidetoshi
Takahiro Arita