Carbonation precipitation of manganese from electrolytic manganese residue treated by CO2 with alkaline additives

DOI

10.2991/mmeceb-15.2016.142How to use a DOI?

Keywords

electrolytic manganese residue, manganese, carbonation precipitation, carbon dioxide.

Abstract

This work reports the results of carbonate precipitation of soluble manganese by CO2 with alkaline additives with the aim of eliminating the harm caused by electrolytic manganese residue (EMR). Results showed that CaO exhibited a better performance for the precipitation of manganese which was converted to rhodochrosite (MnCO3) by infrared spectra and XRD analyses and that the precipitation rate of manganese reached 99.99% at 800 mL/min CO2 flow rate and 5% CaO for 20 min reaction time. The leached concentration of manganese of the treated EMR was reduced to 0.2 mg/L and the leached concentrations of heavy metals of the treated EMR were less than the discharge standard of China (GB8978-1996). Another interesting finding was that the pH value and the ORP of the treated EMR slurry were about 7 and 320 mV respectively, which favoured landfill and reuse of EMR.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - HongLiang Chen
AU  - Renlong Liu
AU  - Qian Long
AU  - Zuohua Liu
PY  - 2015/12
DA  - 2015/12
TI  - Carbonation precipitation of manganese from electrolytic manganese residue treated by CO2 with alkaline additives
BT  - Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
PB  - Atlantis Press
SP  - 721
EP  - 726
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmeceb-15.2016.142
DO  - 10.2991/mmeceb-15.2016.142
ID  - Chen2015/12
ER  -