PURPOSE: To increase the collecting efficiency of magnetic fine particles in a liquid and to facilitate the washing thereof, by a method wherein a magnetic fine wire with a small cross area is molded into a screw form and the interior of the filter tower of an electromagnetic filter is filled with the molded screw shaped magnetic fine wire while an electromagnetic coil is arranged around the filter tower.
CONSTITUTION: A magnetic fine wire with a small cross area, for example, having a short diameter of about 30μm and a long diameter of about 70μm is formed into a screw form having a diameter of, for example, about 2mm and the interior of a filter tower 2 is filled with this screw shaped fine wire 5 through dispersing plates 4, 5. A liquid containing magnetic fine particles is introduced into the filter tower 2 from an arranged pipe 10a and magnetic fine particles are collected by the magnetic fine wire 1 under the action of a high gradient magnetic field while the treated liquid is discharged from an arranged pipe 10b. By this mechanism, the magnetic fine wire holds strength and the interior of the filter tower 2 can be uniformly filled therewith while collected magnetic fine particles can be easily removed out of the filter tower 2 from an arranged pipe 10d by extruding the liquid in the filter tower 2 to the outside at a high flow speed in such a state that values 20a, 20b are closed and valves 20c, 20d are opened.
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EBARA KATSUYA
KUBOTA SHIYOUJI
TAKAHASHI SANKICHI
TOMITA SADAMI
TAKASHIMA YOSHIE
