Recovery and utilization device and method for waste lead paste in waste lead-acid storage batteries

Abstract

The invention discloses a recovery and utilization device for waste lead paste in waste lead-acid storage batteries. The recovery and utilization device for the waste lead paste in the waste lead-acidstorage batteries comprises a reaction kettle, a porous circular-table filler cylinder, an impeller power component, a servo motor, an attachment film, a crystallization filter screen and a cyclic communication system. According to the recovery and utilization device for the waste lead paste in the waste lead-acid storage batteries, desulfuration treatment is carried out on PbSO4 in the waste lead paste through the working of the impeller power component which is controlled by the servo motor, excessive mixed solution of H2O2 and HNO3 continues to be charged, and lead ions in the waste lead paste are displaced out; and the porous circular-table filler cylinder is replaced by another porous circular-table filler cylinder filled with Na2C2O4 solids wrapped with anion exchange resin, the lead ions in the original solution are converted into lead oxalate precipitates, and the lead oxalate precipitates are recovered by the filler cylinder, the attachment film, the crystallization filter screen and other devices in the reaction kettle, and are filtered, washed, and dried-calcined to obtain superfine lead oxide powdery solids. The device is practical and economic, high in recovery rate,novel in structure, low in price, and convenient to clean, and facilitates to realize automation.

Description

technical field [0001] The invention belongs to the technical field of recovery devices for lead-containing compounds, and in particular relates to a device and method for recycling waste lead paste in waste lead-acid batteries. Background technique [0002] With the development of the economy, China has become the world's largest production base of lead-acid batteries, and its lead consumption has surpassed that of the United States to become the world's largest lead-consuming country. However, the service life of general lead-acid batteries is relatively short, and tens of millions of lead-acid batteries are discarded every year, which contain heavy metals such as lead and acidic solutions. Random discarding will not only cause waste of lead resources, but also affect human health and ecology. The environment creates a hazard. At the same time, lead carbonate, the final product obtained by converting and purifying the lead in the lead-acid battery, is a widely used compou...

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Problems solved by technology

[0003] For example, lead carbonate is widely used as a combustion catalyst in solid propellants, but dehydrated lead carbonate is a massive solid, and regeneration requires very cumbersome steps; The activity varies greatly, so it is of great significance to study the appropriate synthesis method, directly obtain ultra-fine lead carbonate by strictly controlling the process conditions, and solve the problem of differences in different batches of lead carbonate

[0004] Nowadays, there are relevant recovery devices and the separation device is a suspension separator, which is expensive in the market; the Chinese patent with the patent number CN103045853B discloses a process for recovering lead in lead-acid battery paste, and its disadvantage is that it can only recover waste after desulfurization. Lead plaster, the single recovery amount is small and the recovery rate is low, the manpower requirement is higher, and the cycle performance is relatively poor; the Chinese patent No. CN107117647A discloses a kind of device for purifying lead carbonate in lead-containing compounds, and its shortcoming is The hollow tee pipeline used for purifying lead will produce sediment and easily block the pipeline after many cycles, the circulation design of the pipeline is not perfect, and the recovery amount is low; the Chinese patent No. CN103014354A discloses the method of recovering lead from the paste of lead storage battery The disadvantage is that the cost of desulfurization is too high, and the recovery device lacks integrity, which is not conducive to automatic implementation

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