Method for preparing manganese sulfate by utilizing manganese oxide

The invention belongs to the field of processing battery materials, and particularly relates to a method for preparing manganese sulfate by utilizing manganese oxide. The preparation method comprises the steps of manganese sulfate steeping, neutralization and iron removal, and deep removal of heavy metals. As an adsorbent, MnO4 in Ca(MnO4)2 and NaMnO4 in the deep removal process of heavy metals has strong adsorption effect on As, Sb and Mo ions, has strong adsorption capability on Cu, Co, Ni, Pb, Fe and other ions in the solution, deep impurity removal of the manganese sulfate solution can be realized under the secondary adsorption action of the adsorbent after the Fe, Cu, Co, Ni and Pb are removed, so that the concentrations of trace elements As, Sb and Mo are all less than or equal to 0.003ppm to obtain high-quality manganese sulfate solution, the filtering and impurity removal of the solution and precipitation of ion impurities can be accelerated by utilizing a filtering aid and a macromolecular polyelectrolyte flocculant, the preparation technology can be simplified, and the preparation process efficiency can be improved.