Method for preparing ammonium molybdate by calcium molybdate and raw material ammonium bicarbonate mixed liquid transformation method

The invention discloses a method for preparing ammonium molybdate by a calcium molybdate raw material ammonium bicarbonate mixed liquor transformation method, and the method comprises the following steps: S1, mixing a calcium molybdate raw material with ammonium bicarbonate-containing transformation mother liquor, and filtering to obtain primary transformation slag and primary transformation mother liquor; S2, treating the primary transformation slag with an ammonium bicarbonate solution for multiple times to obtain transformation mother liquor and final transformation slag, wherein the transformation mother liquor containing ammonium bicarbonate is used as a raw material for mixing the transformation slag and/or calcium molybdate raw material; S3, mixing the primary transformation motherliquor with ammonium sulfide, and performing pre-concentration decarburization treatment on the filtered transformation mother liquor; and S4, carrying out evaporative crystallization treatment on thetransformation mother liq