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 th