Phosphogypsum purification and impurity removal device

A phosphogypsum purification and impurity removal device comprises a size mixing stirring barrel, a discharge port of the size mixing stirring barrel is communicated with an inlet of a first closed transfer box, an outlet of the first closed transfer box is connected with the input end of a first centrifugal pump, the output end of the first centrifugal pump is communicated with a feed port of a decolorization device, and a foam overflow port of the decolorization device is communicated with an inlet of a thickener; a discharge hole of the decolorizing device is communicated with an inlet of the dosing stirring barrel; an outlet of the dosing stirring barrel is communicated with an inlet of the second closed transfer box; an outlet of the second closed transfer box is communicated with aninput end of a second centrifugal pump, an output end of the second centrifugal pump is communicated with a feed port of a desilicication device, a foam overflow port of the desilicication device is communicated with a feed p