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The spent Zn–C cell powder, containing ZnMn2O4, ZnO, MnO(OH) and possibly Mn2O3 and Mn3O4, can be leached by a sulfuric acid solution mixed with some glucose. The leaching is found to be dependent on solid to liquid (S/L) ratio, amount of glucose, concentration of sulfuric acid solution, time and pulp agitation speed. For 5g powder (S), 1h leaching time and 300rpm pulp agitation speed, two-level four-factor...
A large number of waste Zn–C cells (Haquebrand) were broken down and collected as agglomerated powder. This powder was sun-dried, dry-ground and sieved down to 300mesh size and stored. The sample was analysed and found to contain (35.4±0.2)% Mn, (11.0±0.1)% Zn and ∼2.5% Fe as major metallic constituents. The phases, ZnMn2O4 and Zn(ClO4)2·2H2O or MnO(OH) were identified in the hot water washed sample...
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