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A method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery

A technology of solid-phase electrolysis of waste lead-acid batteries, applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of low added value and rising production costs, and achieve the effect of reducing costs and improving the production and operation environment

Active Publication Date: 2021-01-29
杨云婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process consumes a large amount of H 2 SO 4 and NaOH, and produced a large amount of Na with low added value 2 SO 4 , leading to an increase in production costs

Method used

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  • A method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery
  • A method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery
  • A method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery

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Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery, comprising the following steps:

[0031] 1 Restore the lead paste of the waste lead-acid battery.

[0032] 1.1 The main chemical reaction equation:

[0033] PbO 2 +H 2 o 2 =PbO+H 2 O+O 2 ↑(under acidic conditions)

[0034] PbO+H 2 SO 4 =PbSO 4 +2H 2 o

[0035] Pb+PbO 2 +2H 2 SO 4 =2PbSO 4 +2H 2 o

[0036] 1.2 Materials and operating conditions involved in the reduction of lead paste:

[0037] Table 1. Chemical composition list of lead paste (%)

[0038] Pb Ag Cu Fe Zn As Bi Sb sn Cd Ni S h 2 o

74.88 0.0013 0.017 0.152 0.092 0.153 0.0023 0.147 0.048 0.031 0.0004 5.68 3

[0039] Table 2. Reduction slag chemical composition table (%)

[0040]

[0041]

[0042] Table 3. Chemical composition list of reducing solution

[0043]

[0044] Table 4. Paste reduc...

Embodiment 2

[0115] This embodiment provides a method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery, comprising the following steps:

[0116] 1 Reduction of waste lead-acid battery lead paste

[0117] 1.1 The main chemical reaction equation:

[0118] PbO 2 +H 2 o 2 =PbO+H 2 O+O 2 ↑(under acidic conditions)

[0119] PbO+H 2 SO 4 =PbSO 4 +2H 2 o

[0120] Pb+PbO 2 +2H 2 SO 4 =2PbSO 4 +2H 2 o

[0121] 1.2 Materials and operating conditions involved in the reduction of lead paste:

[0122] Table 14. Chemical composition list of lead paste (%)

[0123] Pb Ag Cu Fe Zn As Bi Sb sn Cd Ni S h 2 o

74.88 0.0013 0.017 0.152 0.092 0.153 0.0023 0.147 0.048 0.031 0.0004 5.68 3

[0124] Table 15. Reduction slag chemical composition table (%)

[0125] Pb Ag Cu Fe Zn As Bi Sb sn Cd Ni S h 2 o

70.39 0.0013 0.0035 0.092 0.019 0.0082 0...

Embodiment 3

[0199] This embodiment provides a method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery, comprising the following steps:

[0200] 1 Direct electrolysis of waste lead-acid battery lead paste

[0201] 1.1 Selection of plates:

[0202] Anode plate (dimensions in mm): Ti-Ir-Ru, 600×400×2;

[0203] Cathode basket (dimensions in mm): stainless steel, 600×400×10;

[0204] 1.2 Material and tank loading method:

[0205] 1.2.1 Materials:

[0206] Table 27. Chemical composition of electrolytic materials-lead paste (%)

[0207] Pb Ag Cu Fe Zn As Bi Sb sn Cd Ni S h 2 o

74.13 0.001 0.002 0.053 0.011 0.005 0.001 0.038 0.013 0.001 0.0002 5.459 8.5

[0208] The electrolytic materials are all lead paste, and the charging amount is 145268g.

[0209] 1.2.2 Tank loading method:

[0210]The lead paste is applied in the stainless steel basket of the cathode, and 2 slots are connecte...

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PUM

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Abstract

The invention belongs to the technical field of regenerated lead, and specifically relates to a method for recovering lead by solid-phase electrolytic wet method of waste lead storage battery lead paste, comprising the following steps: S1, adding water and sulfuric acid into the reaction tank, the content of sulfuric acid is 1-100g / L; S2. Add lead plaster to the reaction tank, the weight ratio of which to the solution is 1:1-20; S3. Add hydrogen peroxide to the reaction tank, and the volume ratio of the solution to the hydrogen peroxide is 4-420:1; at 25°C React under the condition of 2 hours; Filtrate, get reduction slag; S4, reduce reduction slag and lead powder mix, make mixture, the mixture is coated in the cathode basket, and electrolyte is added in electrolyzer; S5, connect circuit, Turn on the power supply, add direct current to the cathode and anode, adjust the voltage, and control the current density to 45-250A / m 2 , carry out electrolysis at room temperature for 35-95 hours to obtain electrolytic lead; take the electrolytic lead out of the cathode basket to make lead balls, and refine it to obtain refined lead ingots. The invention improves the grade of electrolytic lead, the efficiency of electrolytic current, and improves the production environment.

Description

technical field [0001] The invention belongs to the technical field of regenerated lead, and in particular relates to a method for recovering lead by solid-phase electrolytic wet method of lead paste of waste lead storage battery. Background technique [0002] With the wide application of lead-acid batteries in automobiles, mobile communication equipment, etc. (the total output of refined lead in the world in 2012 was 10.65 million tons, of which nearly 8.1 million tons were used to manufacture lead-acid batteries, accounting for more than 76% of the refined lead production) , the corresponding processing capacity of waste lead-acid batteries will be huge; moreover, the recycling cost and energy consumption of waste lead-acid batteries are 38% and 33% lower than those of mining lead mines respectively. Therefore, waste lead-acid batteries will be It is a very economical raw material for smelting lead. [0003] At present, the treatment of waste lead-acid batteries is genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/18C22B13/00C22B7/00
CPCY02P10/20
Inventor 赵国良杨龙
Owner 杨云婷