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Influence of Fabric on Aqueous SO2
Leaching of Manganese Ore Extraction
of manganese value through SO2 leaching from three different grade of manganese
ores, viz. high grade, medium grade and low-grade from Nishikhal deposit of Orissa have
been undertaken. The influence of mineral fabric and variable rate of SO2
consumption on extraction of Mn and K from these ores were established. Recovery of metal
values is best achieved in low-grade siliceous variety showing granular texture and devoid
of any ferruginous minerals. This was followed by high-grade ore that exhibits massive
texture, rich in pyrolusite and paucity of gangue constituents. The leaching in case of
medium grade ore is least favoured for intimate intergrowth of Mn-phases with iron
minerals. Consumption of higher quantity of SO2 in medium grade ore further
attests the role of mineral fabric in metal recovery. |
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