A PROCESS FOR THE DESULPHURISATION OF SCRAP LEAD ACID BATTERY SLUDGE FOR THE RECOVERY OF LEAD

摘要

A process for the desulphurization of scrap lead acid battery sludge for the recovery of lead The present invention relates to a process for the desulphurization of scrap lead acid battery sludge for the recovery of lead. The process uses electrolytically regenerated sodium hydroxide for the recovery of lead. The process steps are : desulphursing the spent battery sludge after treating at 300°C in a PVC container at a temperature ranging in between 30-70°C for 15 to 160 minutes using electrolytically regenerated sodium hydroxide from impure sodium sulphate solution at a current density of 1000-5000 A/m2, cooling and filtering the resultant solution to obtain the desired desulphurised sludge essentially containing lead mono oxide.