Influence of Fabric on Aqueous SO2 Leaching of Manganese Ore

P. K. Naik*, B. K. Mahapatra, S. C. Das and V. N. Misra

Regional Research Laboratory (CSIR), Bhubaneswar, India

Received 4 October 2002; accepted 15 June 2003


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.

Keywords: Manganese ore; Fabric; Sulphur dioxide; Leaching

* Corresponding author
   E-mail : pradyumnanaik@yahoo.co.in