Three-magnetic-cylinder combined fine ore dry separator and using method thereof

The invention discloses a three-magnetic-cylinder combined fine ore dry separator and a using method thereof, and belongs to the technical field of magnetic separators, the three-magnetic-cylinder combined fine ore dry separator comprises a supporting frame, an opening is formed in the top of the supporting frame, a spiral feeder is fixedly installed on the opening, and a magnetizing mechanism is arranged in the supporting frame; the magnetizing mechanism comprises a wear-resisting baffle connected to the top in the supporting frame, a first magnetic cylinder arranged on the left side of the wear-resisting baffle, a second magnetic cylinder located below the first magnetic cylinder, a third magnetic cylinder arranged on the right side of the wear-resisting baffle and a material distributing unit located below the second magnetic cylinder; and the belt conveyor is mounted at the bottom of the supporting frame and is matched with the material distributing unit. By means of the lengthened separation belt, the ma