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Extraction of manganese from pyrolusite

Jul 11, 2018 A new method was studied for extracting manganese from low-grade pyrolusite with H2SO4 roasting and subsequent water leaching. The mechanism of roasting and optimal conditions for roasting, including the amounts of H2SO4 and H2O addition and the roasting temperature and time, were discussed. The results indicated that the pyrolusite roasting process in the temperature range of

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