Method for efficiently recovering chlor-alkali salt mud and preparing barium sulfate

The invention relates to the technical field of chlor-alkali salty mud production processes, discloses a method for efficiently recovering chlor-alkali salty mud and preparing barium sulfate, and solves the problems that a large amount of chlor-alkali salty mud in the prior art is low in recovery rate and causes environmental pollution, and the prepared barium sulfate is low in yield and purity. The specific technological process comprises the following steps: pouring the chlor-alkali salt mud and water into a colloid mill, and mixing and slurrying to obtain mixed slurry; sequentially adding the mixed slurry and a flocculating agent into a stirrer for stirring, and carrying out filter pressing by a filter press to obtain supernate and sludge; the supernate and barium hydroxide are poured into a colloid mill to be mixed, and a mixed solution is obtained; and filtering the mixed solution through a screen to obtain a solution containing potassium hydroxide and potassium chloride and a barium sulfate solid. The t