Synchronous impurity removal and purification process for ardealite flotation method

The invention discloses a synchronous impurity removal and purification process by a phosphogypsum flotation method, which comprises the following steps of: carrying out size mixing on phosphogypsum, sequentially adding a decolorizing agent and a collecting agent, and carrying out first-stage reverse flotation operation to obtain rough concentrate and a foam product I; the obtained rough concentrate is mixed with the decolorizing agent and the collecting agent again, second-stage flotation operation is conducted, and final concentrate and a foam product II are obtained; performing blank scavenging operation I on the foam product II to obtain a final tailing foam product III and middling I; and the middlings I are returned to the first-stage reverse flotation operation to form a closed cycle. The method is simple and efficient, various impurities such as phosphorus, fluorine, silicon and organic matters in the phosphogypsum can be synchronously removed, the whiteness of the final product can be improved from 2