FIELD: chemical engineering. SUBSTANCE: line containing, in direction of process, interconnected by transport facilities unit for sulfuric acid dissolution of manganese-containing materials, filter block, manganese dioxide electrolytic precipitation unit, and precipitate separator is also provided with precipitate activation unit disposed after electrolytic precipitation unit and connected into closed circuit (i) with precipitate separator by means of precipitate-in-oxidant suspension and exhausted oxidant transport facilities and (ii) by means of precipitate transport facilities with electrolytic precipitation unit, which, through exhausted electrolyte transport facilities is connected to sulfuric acid dissolution unit. EFFECT: enhanced efficiency of process. 1 dwg
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