Preparation of Mn-Zn Ferrite from Spent Zinc-Carbon Batteries by Alkali Leaching, Acid Leaching and Co-Precipitation
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作者:
Kim, Tae-Hyun
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Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Kim, Tae-Hyun
[1
]
Kang, Jin-Goo
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Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Univ Sci & Technol, Taejon 305333, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Kang, Jin-Goo
[1
,2
]
Sohn, Jeong-Soo
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Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Sohn, Jeong-Soo
[1
]
Rhee, Kang-In
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Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Rhee, Kang-In
[1
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Lee, Seoung-Won
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Chungnam Natl Univ, Dept Nanomat, Taejon 305764, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Lee, Seoung-Won
[3
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Shin, Shun-Myung
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Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
Shin, Shun-Myung
[1
]
机构:
[1] Korea Inst Geosci & Mineral Resources, Minerals & Mat Proc Div, Taejon 305350, South Korea
[2] Univ Sci & Technol, Taejon 305333, South Korea
[3] Chungnam Natl Univ, Dept Nanomat, Taejon 305764, South Korea
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/cm(2) 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-crystal line particles of about 20 rim size with spinet structure.