Method for producing active magnesium oxide from spice waste residues

The invention discloses a method for producing active magnesium oxide from spice waste residues, wherein the method comprises the steps: adding water into basic magnesium chloride waste residues generated from spices to distill out a solvent, carrying out filter pressing to obtain magnesium chloride mother liquor, adding hydrogen peroxide into the mother liquor to fade, adding ammonium bicarbonateand ammonia water to precipitate basic magnesium carbonate, washing, drying and calcining to obtain the active magnesium oxide, wherein the citric acid value is 8.0-18.0 s, and the magnesium oxide content is greater than or equal to 97.5%. According to the invention, the spice basic magnesium chloride waste residues are used as a raw material, and an ammonium bicarbonate carbonization method is used for producing active magnesium oxide, so that the problem of recycling magnesium resources is solved, the economy is created, the ecological environment problem that the waste residues pollute soil and surface water is av