Method for preparing nano mangano-manganic oxide micropowder with high specific surface area

The invention relates to a method for preparing nano mangano-manganic oxide micropowder with high specific surface area, which belongs to the technical field of functional materials. The method comprises the following steps: smelting 91-94% of electrolytic manganese (which does not contain selenium) and 6-9% of graphite by an induction furnace, adopting a graphite crucible, casting to obtain saturated manganese-carbon alloy Mn7C3 and Mn5C2 after melting, and pulverizing the manganese-carbon alloy into fine powder with the particle diameter smaller than 0.076mm; preparing the manganese-carbon alloy powder and deionized water according to the mass ratio of 1:4-1:10 into suspension used for carrying out a hydrolytic oxidation reaction. The invention prepares the selenium-free nano mangano-manganic oxide micropowder with high specific surface area, the particle diameter of the nano mangano-manganic oxide micropowder is about 30-50nm, and the specific surface area of the nano mangano-manganic oxide micropowder is