Author(s)

Patitapaban Mishra, Birendra Kumar Mohapatra, Pradeep Kumar Mallick, Khageswar Mahanta

Institute of Minerals and Materials Technology, Bhubaneswar, India.
OMDC Ltd., Thakurani, Orissa, India.
Ravenshaw University, Cuttack, India.

Two low-grade siliceous manganese ores such 1) siliceous crystalline and 2) siliceous cherty types from north Orissa, Indiawas mineralogically characterized and investigated for their possible upgradation. Both the Mn-ore types were subjected to different physical beneficiation techniques under identical conditions and results reported. The results revealed that in the case of low-grade siliceous crystalline type Mn-ore a feed having 26% Mn could be upgraded to more than 45% Mn by dry magnetic separation with 69% recovery at 1.00 tesla magnetic intensity. But the cherty type Mn-ore could not respond well to any of the beneficiation techniques, particularly dry magnetic separation, because of poor liberation even at a size fraction below 100 mesh, though the other type gives best result at this size fraction.

Siliceous Manganese Ore; Microstructure; Beneficiation

P. Mishra, B. Kumar Mohapatra, P. Kumar Mallick and K. Mahanta, "Influence of Microstructure on Beneficiation of Low-Grade Siliceous Manganese Ore from Orissa, India," Journal of Minerals and Materials Characterization and Engineering, Vol. 1 No. 3, 2013, pp. 80-84. doi: 10.4236/jmmce.2013.13015.