Method of recycling waste lead acid battery lead by electrolyzing with acid-wet method

An electrolytic recovery and lead-acid battery technology, applied in the field of metal lead, can solve the problems of low lead recovery rate in the process flow, and achieve the effect of reducing investment in fixed assets and environmental treatment costs

Inactive Publication Date: 2008-10-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This technology not only does not consume chemical reagents and raw materials, avoids secondary pollution in the refining process, but also realizes the classified recycling and refining of grids, lead paste, sulfuric acid, plastic shells, etc. in waste lead-acid batteries to obtain lead plates, respectively. Plastics and recycled sulfuric acid to eliminate lead and SO in existing pyrometallurgical processes 2 The pollution of exhaust gas and waste slag overcomes the defects of the existing wet lead smelting process, which is complex and the lead recovery rate is low

Method used

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  • Method of recycling waste lead acid battery lead by electrolyzing with acid-wet method

Examples

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Effect test

Embodiment 1

[0027] Take 10 pieces of 12V, 10Ah electric vehicle batteries from Tianjin Lantian High-Tech Co., Ltd., and the total weight of the battery pack is 42.6 kg. Put 10 batteries into the grinding tool, cut off the upper cover of the battery pack by a cutting machine, and then take out the battery pack by a robot to obtain 60 battery cells.

[0028] At this time, the positive and negative poles of the 60 battery cells are connected in parallel with wires, and the battery pack is placed on a 17×200×7.5cm 3The inner layer is a PVC plastic groove of 1.5mm lead plate. Then inject 12L tap water into the electrolytic cell, connect the lead electrolytic cell and lead dioxide positive pole group to the positive pole and negative pole of power supply A respectively, and connect the lead dioxide positive pole group and lead negative pole group to the positive pole and negative pole of power supply B respectively Above, a dual-power multi-module electrolysis mode is formed. By adjusting the...

Embodiment 2

[0032] Take 10 pieces of 12V, 45Ah car batteries from Baoding Fengfan Company, and the total weight of the battery pack is 132 kg. Put 10 batteries into the grinding tool, cut off the top cover of the battery pack by a cutting machine, and then pour out the electrolyte into the acid tank to recover sulfuric acid. The inside of the battery is washed with 60 liters of water to remove residual acid from the battery, which is then discharged into the lead-lined electrolyzer. The battery pack of the car battery is taken out by the manipulator, and 60 battery cells are obtained.

[0033] At this time, the positive and negative poles of the 60 battery cells are connected in parallel with the lead wires of the connecting row, and the battery pack is placed in a 45×400×15cm 3 The inner layer is the PVC plastic groove of 2mm lead plate. Then pour an appropriate amount of water into the electrolyzer until the water surface is submerged in the battery pack. Connect the lead electrolyti...

Embodiment 3

[0037] Take 2 pieces of 12V, 135Ah waste lead-acid batteries for trucks from Northeast Storage Battery Company (please specify the battery type), and the total weight of the batteries is about 92 kg. Put 2 batteries into the grinding tool, cut off the battery pack cover by cutting machine, then pour out the electrolyte into the acid tank to recover sulfuric acid. Wash the inside of the battery with 50 liters of water to remove the residual acid of the battery, and then put the acid into the electrolytic cell lined with 3mm pure lead. The battery pack of the car battery is taken out by the manipulator, and 12 battery cells are obtained.

[0038] At this time, the positive and negative poles of the 12 battery cells are connected in parallel with the lead wires of the connecting row, and the battery pack is placed in a 50×140×15cm 3 The inner layer is the PVC plastic groove of 3mm lead plate. Then pour an appropriate amount of water into the electrolyzer until the water surface...

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Abstract

The invention relates to a method for recovering lead, in particular to a method for electrolyzing and recovering lead in a waste lead-acid accumulator by using an acid-mode wet method. The method comprises the following steps that: firstly, the waste lead-acid accumulator is treated with a pouring acid, a shell of the waste lead-acid accumulator is peeled off and separated to obtain a dilute sulphuric acid, waste plastic and a battery unit or a battery pack; secondly, the battery unit or the battery pack separated from the waste battery is positioned in an electrolytic cell; the lead is reduced by adopting a duplicate power-supply and multi-module electrolysis process; and a lead plate is formed on a slab lattice for recovering the lead. The lead recovery method eliminates the pollution of exhaust gas and waste slag containing the lead and SO2 in the prior pyrogenic lead-smelting process and overcomes the disadvantages of complex flow and low lead recovery coefficient in the prior wet lead smelting process.

Description

technical field [0001] The present invention relates to a recovery method for lead, in particular to a method for recovering lead in waste lead-acid batteries by acid wet electrolysis, that is, lead in various valence states in waste lead-acid batteries is electrolyzed into The method of direct utilization of metallic lead. It is suitable for the clean recovery and recycling of lead in lead-acid batteries, and is suitable for a high-efficiency wet lead smelting technology for industrial production. Background technique [0002] With the rapid development of science and technology, especially the rapid development of my country's automobile industry, automobiles and electric vehicles have become an indispensable means of transportation for people's lives. As an indispensable electric energy storage device for automobiles and electric vehicles, lead-acid batteries have a rapid increase in consumption and scrap along with the consumption of automobiles. In 2002, the consumpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B13/00
CPCY02P10/20Y02W30/84
Inventor 潘军青孙艳芝王远万平玉
Owner BEIJING UNIV OF CHEM TECH
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