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Manganese ore grinding

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Manganese ore is the primary source of manganese used in the manufacture of manganese ferroalloys, metal, and dioxide. Virtually all manganese ores are subjected to some form of beneficiation to achieve a concentrated product having greater manganese content and fewer undesirable impurities. Manganese content of the more commonly used and traded ores, concentrates, nodules, and sinter for metallurgical purposes is in the approximate range of 38% to 55%. A manganese content of 48% is considered standard as a pricing basis. The composition of ores used for chemical purposes and in batteries may be approximately the same as that of metallurgical ores although particle size tends to be smaller. For battery‐grade dioxide ores the manganese content may be expressed in terms of the active ingredient, MnO2, which contains 63% manganese. Dioxide ores typically contain from 70% to 85% MnO2 (44% to 54% manganese), but can be less as in local ore consumed in uranium extraction operations in South Africa.


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