Zinc is recovered from Zinc Sulphate in the electrolysis cells by an electro-winning process in which zinc is deposited on aluminum cathodes.

ZnSO4 + H2O = Zn + H2SO4 + 1/2O2

The zinc deposits are stripped from the aluminium cathodes and transferred to the Melting and Casting Plant.

The sulphuric acid produced during the electrowinning process is returned to the Leaching Plant to leach zinc oxide (Calcine).

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