Method for preparing PbO, PbSO4 and PbO2 from lead plaster of waste lead storage battery through separation

Abstract

The invention relates to a method for preparing PbO, PbSO4 and PbO2 from lead plaster of a waste lead storage battery through separation. According to the method, the PbO, PbSO4 and PbO2 mixture containing lead plaster obtained from the waste lead storage battery subjected to pretreatment is taken as a raw material, and PbO, PbSO4 and PbO2 are separated and prepared with technologies including nitric acid dissolving, ammonia-process extraction, separation, refining and solid-liquid separation coupling. PbO, PbSO4 and PbO2 obtained through separation and refining are directly taken as raw materials for preparing active electrode substances of the lead storage battery, and direct utilization of the lead plaster of the waste lead storage battery is realized. The process is reasonable, the purity and the yield of products are high, by-products in the process are greatly reduced, the comprehensive utilization cost of the lead plaster resource is reduced, the preparation method is simple, the process is safe and reliable, and large-scale industrialization is facilitated.

Description

technical field [0001] The invention relates to a process method for resource recovery and utilization of lead in waste lead storage batteries, which is a process and technology for comprehensive utilization of lead resources in waste lead storage batteries. It belongs to the technical field of three wastes treatment and resource utilization, especially the technical field of comprehensive utilization of waste lead storage batteries; it also belongs to the technical field of chemical separation; it also belongs to the technical field of preparation of inorganic materials. Background technique [0002] 1. Lead resource recovery and utilization of waste lead-acid batteries [0003] 1.1 Lead storage battery [0004] The main components of lead-acid batteries are positive plate, negative plate, electrolyte, diaphragm or separator, battery tank, in addition, there are some parts such as terminals, connecting strips, exhaust plugs, etc. Lead-acid batteries have the advantages of...

AI Technical Summary

Problems solved by technology

[0011] 2. Existing processes and technologies for lead resource recovery and utilization

[0039] (1) PbO on the anode 2 Precipitation problem: Although each process is reducing the PbO on the anode 2 Corresponding research has been done on the precipitation of PbO on the anode, but it is still difficult to completely suppress the PbO on the anode. 2 formation, resulting in low lead recovery

[0040] (2) The problem of consuming a large amount of chemical reagents and producing by-products: each process involves many processes, takes a long time and introduces a large amount of chemical reagents, and produces a large amount of sulfate by-products in the desulfurization conversion process, which not only increases the preparation cost of Pb, also affect the economic

[0041] (3) High energy consumption and large investment: because in the electrochemical deposition process, only the effective reaction occurs at the cathode, the energy consumption of metal lead recovery by electrochemical deposition is high, and the energy consumption of preparing 1 kg of lead is about 12kWh, which is even higher than that of traditional The energy consumption of the pyrometallurgical process is even higher

[0071] ①Consumption of a large amount of chemical reagents: in citric acid desulfurization-H 2 o 2 In the conversion process, citric acid, sodium citrate and H 2 o 2 , affects the technical and economic indicators of the process, and the use of a large number of chemical reagents greatly increases the cost of preparation and affects the economic benefits of the process

[0073] ③ The prices of citric acid and sodium citrate are high, and the atomic utilization rate of this process is still low

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