Comparative leaching of spent zinc-manganese-carbon batteries using sulfur dioxide in ammoniacal and sulfuric acid solutions

G. Senanayake; S-M. Shin; A. Senaputra; A. Winn; D. Pugaev; J. Avraamides; J-S. Sohn; D-J. Kim

doi:10.1016/j.hydromet.2010.07.004

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Comparative leaching of spent zinc-manganese-carbon batteries using sulfur dioxide in ammoniacal and sulfuric acid solutions

Journal article

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Comparative leaching of spent zinc-manganese-carbon batteries using sulfur dioxide in ammoniacal and sulfuric acid solutions

G. Senanayake, S-M. Shin, A. Senaputra, A. Winn, D. Pugaev, J. Avraamides, J-S. Sohn and D-J. Kim

Hydrometallurgy, Vol.105(1-2), pp.36-41

2010

DOI: https://doi.org/10.1016/j.hydromet.2010.07.004

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Abstract

The non-magnetic fraction of spent zinc-manganese-carbon batteries containing 20.8% Zn, 22.7% Mn, 2.65% Fe, and < 0.1% Hg, Ni, Co, Cu and Pb was leached in H2SO4, H2SO4/SO 2, NH3 and NH3/SO2 at 30-60 °C. In acid media the complete dissolution of zinc is unaffected by SO2. However, the reductive role of SO2 increases the leaching of manganese in H2SO4 from 25% to 100% and iron from 1% to 25%. Literature results of leaching with other reductants are compared. The XRD analysis of leach residues from ammonia solutions shows the conversion of Zn5(OH)8Cl2•H2O in the feed to ZnO with low dissolution of zinc, manganese and iron. Low leaching of iron in NH3/SO2 is due to the formation of Fe(NH4) 2(SO3)2 and Fe(NH4) 2(SO4)2 identified by XRD analysis of leach residues. However, the formation of Zn(NH3)42+ facilitates the selective leaching of zinc in buffered SO2/NH 3 solutions that contains NH4+. Complete dissolution of copper also occurs in both H2SO4/SO 2 and NH3/SO2. The dissolution of mercury by H2SO4 is retarded in the presence of SO2, and enhanced by NH3/SO2. Lead remains insoluble in all media, whilst the partial dissolution of nickel and cobalt is retarded by NH 3/SO2.

Details

Title: Comparative leaching of spent zinc-manganese-carbon batteries using sulfur dioxide in ammoniacal and sulfuric acid solutions
Authors/Creators: G. Senanayake (Author/Creator)
S-M. Shin (Author/Creator)
A. Senaputra (Author/Creator)
A. Winn (Author/Creator)
D. Pugaev (Author/Creator)
J. Avraamides (Author/Creator)
J-S. Sohn (Author/Creator)
D-J. Kim (Author/Creator)
Publication Details: Hydrometallurgy, Vol.105(1-2), pp.36-41
Publisher: Elsevier BV
Identifiers: 991005543145307891
Murdoch Affiliation: Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 7 Engineering & Materials Science; 7.229 Mineral & Metal Processing; 7.229.774 Bioleaching
Web Of Science research areas: Metallurgy & Metallurgical Engineering
ESI research areas: Materials Science