The reduction of manganese dioxide in low-grade manganese ore by biomass roasting process was investigated for extracting manganese from poor manganese ore more effectively. In this study，the cinder of ore fines and sawdust was further leached by sulphuric acid to obtain MnSO4. Over 97% manganese in ores can be converted into MnSO4. Effects of the mass ratio of manganese ore to sawdust, roasting temperature and time, leaching temperature and time, leaching agent concentration and liquid-solid ratio were studied. The manganese recovery achieved 97.71% under the conditions: the mass ratio of manganese ore to sawdust of 5:1, roasting temperature 500℃ for 40min, leaching temperature 60℃ for 40min, sulphuric acid concentration of 1mol/L and liquid-solid ratio of 10:1. This technology can be suitable for extraction of Mn in low-grade manganese ore.
SONG Jing-Jing
,
ZHU Guo-Cai
,
DIAO Yu-Na
,
ZHANG Ping
. Reduction treatment of low-grade manganese ore by biomass roasting[J]. Acta Metallurgica Sinica (English Letters), 2010
, 23(3)
: 223
-229
.
DOI: 10.11890/1006-7191-103-223
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