Separation method of PbO, PbSO4 and PbO2 mixture

Abstract

The invention relates to a separation method of a PbO, PbSO4 and PbO2 mixture, in particular to a process and a technology of resource comprehensive utilization of a lead containing material of a waste lead storage battery, and belongs to the technical field of comprehensive utilization of three wastes of the waste lead storage battery or separation and refining of inorganic compounds. The separation method comprises steps as follows: PbO, PbSO4 and PbO2 mixture containing lead plaster obtained from the lead containing material, treated with a physical separation method, of the waste lead storage battery is taken as a raw material, the raw material is treated with technologies including acid pickling dissolving, leaching dissolving, separation, refining and solid-liquid separation coupling, and separation of the PbO, PbSO4 and PbO2 mixture is realized. The process is reasonable, the preparation method is simple, 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 process is safe and reliable, and large-scale industrialization is facilitated.

Description

technical field [0001] The invention relates to a process method for recycling lead from waste lead storage batteries, specifically, the lead-containing materials of waste lead storage batteries are processed through physical separation to contain PbO and PbSO 4 , PbO 2 The lead paste of the mixture is used as the raw material, and the acid leaching and dissolving, leaching and dissolving, separation and refining, and solid-liquid separation coupling technologies are used to realize PbO and PbSO 4 , PbO 2 Separation of mixtures. [0002] 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 [0003] 1. Lead resource recovery and utilization of waste lead-acid batteries [0004] 1.1 Lead st...

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Problems solved by technology

[0012] 2. Existing processes and technologies for lead resource recovery and utilization

[0038] 2.2.3 The main problems in the electrochemical deposition process

[0040] (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

[0041] (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

[0042] (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

[0072] 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

[0074] 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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