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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C. H. Peng, B. S. Bai, and Y. F. Chen,Waste Management 28, 326 (2008).
S. M. Shin, J. K. Kang, D. H. Yang, and J. S. Sohn,mater. Trans. 48, 244 (2007).
K. H. Park, J. S. Sohn, and S. K. Kim,Geosystem Eng. 5, 8 (2002).
G. H. Lee, C. K. Rhee, K. H. Kim, Y. S. Han, and W. W. Kim,Met. Mater.-Int. 9, 375 (2003).
G. G. Lee and W. Y. Kim,Met. Mater.-Int. 11, 177 (2005).
S. H. Keluskar, R. B. Trangsali, G. K. Naik, J. S. Budkuley,J. Magn. Magn. Mater. 305, 296 (2006).
J. T. Park, J. G. Kang, J. S. Sohn, D. H. Yang, and S. M. Shin,J. of Korea Inst. of Resources Recycling 15, 48 (2006).
S. M. Shin, J. S. Sohn, D. H. Yang, J. G. Ahn, S. K. Kim, and H. T. Sohn,J. of Korea Inst. of Geoscience & Mineral Resources 41, 285 (2004).
H. T. Sohn, J. G. Ahn, J. S. Sohn, K. H. Park, and I. Y. Park,J. of Korean Inst. of Resources Recycling 11, 44 (2002).
M. Kawahara and T. Mitsuo,J. Mining Mater. Process. Inst. Jpn. 108, 396 (1992).
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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