Automatic coal washing dense medium density control device

The utility model discloses a coal washing dense medium density automatic control device which comprises a dense medium barrel, a medium distribution box, a medium circulation barrel, a mixing barrel and a controller, a discharge port of the dense medium barrel is connected with a feed port of the medium distribution box through a medium adding valve, the medium distribution box is connected with a feed port of the medium circulation barrel through a medium distribution valve, and the mixing barrel is connected with the controller. The medium distribution box is directly connected with a feed port of the mixing barrel, the medium circulation barrel is connected with a feed port of the concentrated medium barrel through a concentrated medium returning barrel valve, and the medium circulation barrel is connected with a feed port of the mixing barrel through a mixing barrel returning valve; liquid level detection devices are arranged on the material mixing barrel and the medium circulation barrel, a density dete