Influence of the Electrode Material Composition on Extraction of Zinc from Waste Zn/MnO2 Batteries

Page: 496

J. Formánek and J. Jandová

Department of Metals and Corrosion Engineering, Institute of Chemical Technology, Prague

 

Waste alkaline and zinc-chloride Zn/MnO2 batteries were subjec¬ted to grinding and particle size separation. Zn and Mn extractions by leaching were studied. The size fractions were leached successively in water and in 15% H2SO4 to study kinetics of Zn and Mn extraction. Almost 100 % Zn and ca. 20 % Mn were extracted from alkaline Zn/MnO2 batteries. Depending on the particle size of the leached electrode materials 85–98 % Zn and ca. 30 % Mn were obtained from zinc-chloride Zn/MnO2 batteries or from their mixture with alkaline batteries. Leaching residues are valuable Mn waste materials.

 

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