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Preparation of Mn−Zn ferrite from spent zinc-carbon batteries by alkali leaching, acid leaching and Co-precipitation

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Abstract

The treatment of spent zinc-carbon batteries for the recovery of valuable metals followed by conversion to Mn−Zn ferrite has been conducted employing two-stage alkali and acid leaching and co-precipitation method. In the first stage, leaching process was carried out with 4 M NaOH, which resulted in a recovery of 63.4 %Zn and 0.1% Mn. Electrowinning of alkali leaching solution containing 12.75 g/L Zn at a current density of 0.2 A/cm2 produced Zn metal of 15 nm to 30 nm size and 99.9% purity. The second stage leaching of residue with 3 M H2SO4 and 6 vol.% H2O2 at a solid/liquid ratio of 1∶10 indicated the leaching efficiency of 98.0% Zn, 97.9% Mn and 55.2% Fe. The obtained leaching solution was finally adjusted to suitable mole ratios of Mn∶Zn∶Fe (1∶1∶4) by the addition of Zn and Fe sulfate salts followed by pH control to produce Mn−Zn ferrite powder. The characterization of the ferrite powder showed uniform nano-crystalline particles of about 20 nm size with spinel structure.

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Authors and Affiliations

  1. Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources, Gwahang-no 92, Yuseong-gu, 305-350, Daejeon, Korea

    Tae-Hyun Kim, Jin-Goo Kang, Jeong-Soo Sohn, Kang-In Rhee & Shun-Myung Shin

  2. Resource Recycling, University of Science & Technology (UST), 52, Eoeun-dong Yuseong-gu, 305-333, Daejeon, Korea

    Jin-Goo Kang

  3. Department of Nano Materials, Chungnam National University, 220, Gung-dong, Yuseong-gu, 305-764, Daejeon, Korea

    Seoung-Won Lee

Authors
  1. Tae-Hyun Kim
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  2. Jin-Goo Kang
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  3. Jeong-Soo Sohn
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  4. Kang-In Rhee
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  5. Seoung-Won Lee
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  6. Shun-Myung Shin
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Correspondence to Shun-Myung Shin.

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Kim, TH., Kang, JG., Sohn, JS. et al. Preparation of Mn−Zn ferrite from spent zinc-carbon batteries by alkali leaching, acid leaching and Co-precipitation. Met. Mater. Int. 14, 655–658 (2008). https://doi.org/10.3365/met.mat.2008.10.655

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  • DOI: https://doi.org/10.3365/met.mat.2008.10.655

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