Abstract: A process of regenerating and recovering lead from lead sulphate-containing wastes which comprises(i) contacting the lead battery scrap with an aqueous solution of ammonium carbonate to form lead carbonate and ammonium sulphate,(ii) subjecting the solid phase containing the lead carbonate obtained by solid-liquid separation of the reaction product so formed to roast-reduction at a temperature ranging from about 350.degree. C. to about 700.degree. C. in the presence of a carbon material reducing agent to generate and recover the lead,(iii) double decomposing the liquid phase containing the ammonium sulphate obtained by said solid-liquid separation by the addition of calcium hydroxide in an amount such that the molar ratio of the calcium hydroxide added, expressed as Ca(OH).sub.2 /(NH.sub.4).sub.2 SO.sub.4, is about 1.05 to about 1.