Preparation of Mn-Zn Ferrite from Spent Zinc-Carbon Batteries by Alkali Leaching, Acid Leaching and Co-Precipitation

被引:19
|
作者
Kim, Tae-Hyun [1 ]
Kang, Jin-Goo [1 ,2 ]
Sohn, Jeong-Soo [1 ]
Rhee, Kang-In [1 ]
Lee, Seoung-Won [3 ]
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
关键词
spent zinc-carbon battery; NaOH leaching; Zinc; H2SO4; leaching; Mn-Zn ferrite powder;
D O I
10.3365/met.mat.2008.10.655
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页码:655 / 658
页数:4
相关论文
empty
未找到相关数据