Method for comprehensive utilization of waste lead-acid battery resources

Abstract

The invention relates to a method for recycling and utilizing lead resources in waste lead-acid batteries, which is a process and technology for comprehensive utilization of lead-containing resources in waste lead-acid batteries. It consists of three steps for the separation and preparation of PbSO4, PbO, PbO2" and "preparation of lead battery electrodes". The invention has the advantages of simple process, convenient operation and control, low production cost, few by-products, high atom utilization rate, safe and reliable process, and is beneficial to large-scale industrialization, and is an effective method for resource recovery and utilization of waste lead battery lead.

Description

technical field [0001] The invention relates to a process method for resource utilization of waste lead storage batteries, in particular to a process technology for resource utilization of lead-containing materials in waste lead storage batteries, belonging to the technical field of three wastes treatment and resource utilization, especially the comprehensive utilization of waste lead storage batteries. The invention belongs to the technical field of utilization; it also belongs to the technical field of preparation of inorganic materials, especially the technical field of preparation of electrode materials; it also belongs to the technical field of chemical separation. Background technique [0002] 1. Lead resource recovery and utilization of waste lead-acid batteries [0003] 1.1 Lead storage battery [0004] In 1859, French Plante (Gaston Plante) invented the lead storage battery. Two lead plates are used as electrodes, placed in sulfuric acid solution for electrolysis,...

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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 of 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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