TITLE:
Reductive Acid Leaching of Low Grade Manganese Ores
AUTHORS:
Alok Prasad Das, Sarpras Swain, Shriyanka Panda, Nilotpala Pradhan, Lala Behari Sukla
KEYWORDS:
Low Grade; Manganese ore; Oxalic Acid; Citric Acid; Leaching
JOURNAL NAME:
Geomaterials,
Vol.2 No.4,
October
31,
2012
ABSTRACT: Manganese recoveries from low-grade ores using organic acids as reducing agents were investigated in the present work. The acid leaching potential of both oxalic acid and citric acid were estimated. Manganese leaching amount were measured by using standard manganese curve and estimated by titration method. Effects of various acid concentrations on leaching efficiency were studied. The observed result suggested prominent manganese recovery of 66% by oxalic acid at 2 M concentration whereas citric acid had less effect on leaching showing leaching percentage upto 40% in 6 days. Acid leaching of manganese ore with both the acids gave a comparative data stating that oxalic acid leached better than citric acid.