Classified and fluidized weak magnetic separation device for strongly magnetic minerals

The invention discloses a classified and fluidized weak magnetic separation device for strongly magnetic minerals. The device comprises a support base, fluidized separation cavities I and II, threaded upright posts, a magnetic system support plate, rectangular open magnetic systems I and II, wherein the fluidized separation cavities I and II are arranged in sequence from front to back along the longitudinal direction of the support base, the threaded upright posts are fixedly installed at four corners of the support base, the magnetic system support plate is fixedly installed at the upper parts of the threaded upright posts by threaded connecting pieces, and the rectangular open magnetic systems I and II are installed on the bottom surface of the magnetic system support plate; the rectangular open magnetic system I is located just above the fluidized separation cavity II, and the rectangular open magnetic system II is located just above the fluidized separation cavity I; and a leaking screen is arranged at the abutting end of the fluidized separation cavities I and II, and a blower is connected to the front end of the fluidized separation cavity I by an air pipe. According to the fluidized magnetic separation device for classifying coarse fraction and micro-size fraction and separation on the same platform, the complexity of a process for treating fine iron ores can be reduced, the magnetic separation pertinence is enhanced, and magnetic separation of concentrates can be realized with high grade and high recovery rate.