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Separation of zinc from spent zinc-carbon batteries by selective leaching with sodium hydroxide
Journal article   Open access   Peer reviewed

Separation of zinc from spent zinc-carbon batteries by selective leaching with sodium hydroxide

S.M. Shin, G. Senanayake, J-S Sohn, J-G Kang, D-H Yang and T-H Kim
Hydrometallurgy, Vol.96(4), pp.349-353
2009
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Abstract

Physical methods such as crushing and sieving followed by magnetic separation steps were applied to separate non-magnetic material (88.4 wt.%) from zinc-carbon spent batteries. The oversize material was processed by eddy current separation to recover zinc sheet, carbon rods, and plastics. The undersize fraction (- 2.36 mm) with a metal composition of 15.5% Zn, 17.5% Mn, and 1.4% Fe was used for the leaching experiments under different conditions such as concentration of sodium hydroxide, temperature, agitation speed, and pulp density. Selective leaching using 4 mol dm - 3 NaOH at 100 g dm - 3 solid/liquid ratio, 80 °C and 200 rpm gave a zinc extraction of 82% and a manganese extraction of less than 0.1%. An overall zinc recovery was about 88.5% by the processes described in this study.

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7 Engineering & Materials Science
7.229 Mineral & Metal Processing
7.229.774 Bioleaching
Web Of Science research areas
Metallurgy & Metallurgical Engineering
ESI research areas
Materials Science
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