Method for Directly Recovering Lead Oxide Used for a Lead-Acid Battery Negative Electrode from Waste Lead Paste

摘要

The present invention provides a method for directly recovering a lead oxide lead for a cathode of a lead-acid battery from a waste lead paste. The method comprises the steps of: (1) contacting the waste lead paste with a barium-containing desulfurizing agent under a desulfurization reaction condition, performing solid-liquid separation of the mixture resulting from the contacting reaction to obtain a filtrate and a filtration residue; And (2) subjecting the filtration residue to a conversion reaction at 350 to 750 ° C. to convert the lead-containing components in the filtration residue to lead oxide. In this method, since the method of directly recovering the lead oxide raw material applicable to the negative electrode of the lead-acid battery from the waste lead paste is achieved by quantitatively replenishing the barium sulfate additive in the process of desulfurization, Increase the overall utilization of waste lead paste.