Method for directly and cyclically recovering and utilizing phosphoric acid waste lead mud of lead-acid storage battery

Abstract

The invention discloses a method for directly and cyclically recovering and utilizing phosphoric acid waste lead mud of a lead-acid storage battery. The method comprises the main steps of (1) recovering waste lead mud; (2) determining the content of lead sulfate in the phosphoric acid waste lead mud; (3) performing desulfurization; (4) performing solid and liquid separation; (5) performing cyclical utilization: positive electrode recovery lead mud is added into a positive electrode paste mixing machine to be cyclically utilized; negative electrode recovery lead mud is added into a negative electrode paste mixing machine to be cyclically utilized. The method has the advantages that the method is simple and is easy to implement; the required time is short; the product is uniform and stable; the purity is high; the problem of impurity pollution cannot be caused; no any adverse influence is caused on the battery performance.

Description

technical field [0001] The invention relates to the technical field of lead-acid storage battery production, in particular to a method for direct recycling and utilization of waste lead sludge soaked in lead-acid storage battery. Background technique [0002] Now in the production of lead-acid batteries, the plates will go through the stages of coating, soaking acid and curing. During the acid-leaching stage of the pole plate, a small part of the paste on the surface of the pole plate will fall into the acid-leaching tank. The lead sludge on the pole plate cannot be recycled, and will be collected uniformly and sold to lead recycling companies. However, in the production process of lead-acid batteries, the process is strictly controlled, which also contributes to the uniformity and stability of the waste lead paste produced. The waste lead plaster contains lead oxide, lead sulfate, elemental lead and moisture, and also contains a small amount of lead-acid battery formula. ...

AI Technical Summary

Problems solved by technology

Does not meet the requirements of the green economy

And after drying, the lead slime itself is relatively fine, coupled with consistent immersion in sulfuric acid, it is bound to be settled and hardened in the drying stage, which brings greater difficulty in the crushing stage and causes dust pollution

Moreover, the processing time of the modification method is long, and it is basically impossible for general battery manufacturers to realize 100% recycling