| 摘要 |
PURPOSE:To readily obtain a high-purity Mn compound, by adding ferromanganese to an aqueous solution containing an electrolyte, adjusting to proper pH, dissolving iron, aging, separating and removing undissolved substances, precipitating Mn and iron and recovering. CONSTITUTION:An electrolyte-containing aqueous solution (e.g. aqueous solution of ammonium chloride) is blended with one or more of ferromanganese and metallic manganese, an acid is added to the solution while stirring, manganese and iron are dissolved by maintaining pH2-9. The solution is aged, undissolved substances are condensed, coarse particles are formed and the undissolved substances are separated and removed. Then manganese and iron in the solution are precipitated and recovered to give a high-purity manganese compound. The prepared manganese compound has low content of impurities such as Si and P and is preferably used as a raw material for ferrite of manganese type.
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