Efficient production method of high-purity semi-hydrated desulfurization paste

The invention provides an efficient production method of high-purity semi-hydrated desulfurization paste, and relates to the technical field of building decoration materials. According to the high-efficiency production method of the high-purity semi-hydrated desulfurized paste, the raw material is desulfurized gypsum, an impurity removal auxiliary agent is a dilute sulfuric acid solution with the mass fraction of 10%-20%, and the mass ratio of the desulfurized gypsum to the dilute sulfuric acid solution is 1:(10-20). Large-particle impurities in the desulfurized gypsum can be filtered out through first-time filtering, the impurities in the desulfurized gypsum are ground through first-time grinding, when dilute sulphuric acid is added for impurity removal of the desulfurized gypsum, the impurity removal time of the desulfurized gypsum can be shortened, the purification efficiency of the desulfurized gypsum can be improved, calcite and brucite can be efficiently removed, the content of free water in the desulfu