METHOD FOR PREPARING A MIXED ZINC AND MANGANESE OXIDE

摘要

The invention concerns a method for preparing a mixed zinc and manganese oxide, in particular ZnMn2O4, from a manganese and zinc sulphate solution, comprising the following steps: cementation by addition of zinc in acid medium from room temperature; separating the cement formed; precipitating by addition of carbonate in neutral medium; and calcining the mixed carbonate into zinc manganite. The purity of the resulting mixed oxide enables its use in soft ferrite industry. The invention is useful in particular for treating and upgrading of used primary batteries.