Method for depositing and sorting multi-stage lead paste of waste lead-acid batteries

Abstract

The invention discloses a method for depositing and sorting multi-stage lead paste of waste lead-acid batteries. The method comprises the steps that S1, the waste lead-acid batteries are crushed; S2,the lead paste is extracted; S3, the lead paste is deposited; S4, the lead paste is extracted; S5, the lead paste is deposited for a second time; and S6, acid solution treatment is conducted. According to the method, the role of a flocculant can be fully played by passing the lead paste through multiple times of deposition of a scraper and a deposition box, so that the lead paste is fully deposited in an acid solution, and acid water with a small amount of the lead paste provides high-pressure water flushing for crushing and sorting, the lead paste sorting rate is increased, the mutual dopingrate of material sorting is decreased, and the overall sorting accuracy of the entire system is improved. Thus, the sorting accuracy is guaranteed while production capacity of the device is greatly improved, the waste of the lead paste is reduced, and the environmental pollution is reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of waste battery treatment, in particular to the technical field of lead paste precipitation and separation of waste lead-acid batteries. 【Background technique】 [0002] At present, waste lead-acid batteries are a major pollution source in the natural environment. If waste lead-acid batteries are not properly disposed of, it will have a serious impact on the environment. The electrodes of lead-acid batteries are mainly made of lead and its oxides. The liquid is a battery of sulfuric acid solution. In the discharge state, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in the charging state, the main component of the positive and negative electrodes is lead sulfate. At present, the extraction method of waste lead-acid battery lead paste, similar equipment at home and abroad adopts "single-stage lead paste sedimentation and separation s...

AI Technical Summary

Problems solved by technology

The volume of the ship-type scraper engine room is limited. Even under the action of flocculants, the lead paste cannot sink to the bottom quickly, and a large amount of lead paste is in the suspension layer, resulting in a large amount of lead paste in the acid water pumped by the vertical pump, resulting in subsequent material separation accuracy. Poor, high impurity content, low lead paste extraction rate, resulting in a certain waste, and greater damage to the environment, unable to meet the needs of large-scale lead paste separation of more than 300,000 tons

The flocculant has a fixed reaction time, so in the case of mass production, a large amount of lead paste produced by crushing and sorting cannot be fully precipitated after crushing and sorting into the scraper machine, and the liquid surface on the scraper machine contains Lots of Paste Particles

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