Recovery of lead from battery scrap
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorDonald A. Wilson
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Abstract
Lead is recovered from battery scrap by means of a process comprising (1) reacting the scrap with a slurry of calcium hydroxide to form a product comprising PbO and CaSO.sub.4.2H.sub.2 O, (2) filtering and drying the reaction product and (3) reacting the product with a mixture of carbon and a KCl-NaCl flux at elevated temperature to flux the calcium sulfate and reduce the lead oxide to metallic lead.
Claims3
A process for recovery of lead from lead battery scrap comprising (1) reacting the scrap with an aqueous slurry of calcium hydroxide to form a product comprising lead oxide and calcium sulfate, (2) filtering and drying the reaction product and (3) reacting the product with a mixture of carbon and a KCl-NaCl flux at a temperature of about 605.degree. to 700.degree.C to flux the calcium sulfate and reduce the lead oxide to metallic lead.
Dependencies are inferred from the claim text.