Method for recovering strontium from manganese leaching residues

The invention discloses a method for recovering strontium from manganese leaching residues. Adding water into the manganese leaching residues, mixing and stirring to prepare uniform slurry; adding the mixed alkali liquor into the slurry liquid, adding water, mixing, heating, stirring and reacting after mixing, and filtering a reaction product to obtain conversion slag and conversion liquid; a hydrochloric acid solution is added into the conversion residues, water is added for mixing, then a stirring reaction is conducted at the normal temperature, filtering is conducted after the reaction, and acid leaching residues and strontium acid leaching liquid are obtained; adding alkali liquor into the obtained strontium pickle liquor to adjust the pH value of the solution, then carrying out heating reaction, and filtering after the reaction to obtain filtrate; and adding ammonium bicarbonate into the obtained filtrate to precipitate strontium, and drying to obtain a strontium carbonate product. The recovery method di