Method for producing barium sulfate and ammonia chloride by using barium chloride waste residue

The invention provides a method for producing barium sulfate and ammonia chloride by using barium chloride waste residue, which comprises: fully dissolving barium chloride waste residue from the preparation of thiourea by the reaction of hydrochloric acid and barium sulfide in water, and mixing the solution with hydrochloric acid for reaction to obtain solution containing barium chloride; mixing the solution containing barium chloride with ammonium sulfate for reaction to obtain barium sulfate and ammonium chloride; filtering to obtain a barium sulfate filter cake and solution containing ammonium chloride; washing, crushing and drying the barium sulfate filter cake to obtain a barium sulfate product; and distilling the obtained solution containing ammonium chloride to obtain oversaturatedsolution, and crystallizing and precipitating ammonium chloride to obtain an ammonium chloride product. In the method, operation is simple, equipment investment is low, and active ingredients in barium chloride waste residue