Devices and Method for Smelterless Recycling of Lead Acid Batteries

摘要

Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining and spent electroprocessing solvent can be recycled to the recovery process.

主权项

1. A method of processing lead materials from lead acid batteries, comprising:
providing lead materials comprising grid lead and active material lead, and contacting the lead materials with an electroprocessing solvent to selectively dissolve the active material lead to so form a lead ion-enriched electroprocessing solvent and solid grid lead; wherein the electroprocessing solvent is an aqueous solution of an alkane sulfonic acid and a chelator: removing at least some of the grid lead from the lead ion-enriched electroprocessing solvent; and reducing lead ions in the lead ion-enriched electroprocessing solvent on a cathode to form high-purity lead and regenerated electroprocessing solvent.