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Method for recovering lead in lead plaster of waste lead-acid storage batteries

A waste lead-acid battery and a recovery method technology, which is applied in the field of recovery of lead in the lead paste of waste lead-acid batteries, can solve the problems of long process and achieve the effects of less adsorption of electrolyte, short process flow and easy cleaning

Inactive Publication Date: 2012-09-19
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to desulfurize and reduce the lead paste in advance, and the process is long

Method used

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  • Method for recovering lead in lead plaster of waste lead-acid storage batteries
  • Method for recovering lead in lead plaster of waste lead-acid storage batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: present embodiment is to the recovery method of lead in lead plaster, and the steps are as follows:

[0035] (1) After the waste lead-acid battery is crushed, the lead paste part is selected, dried and ground to 100 mesh to obtain the lead paste powder;

[0036] (2) Take by weighing 120g sodium hydroxide, 150g tartaric acid and add in 1.5L water (the weight ratio of water, sodium hydroxide, tartaric acid is 100:8:10), stir and dissolve, obtain leachate;

[0037] (3) Add 180g of lead plaster powder into the leachate, dissolve, react at 50°C with a stirring speed of 500r / min for 3h, filter to obtain an electrolyte, wherein the concentration of tartaric acid is 150g / L, and the concentration of sodium hydroxide is 80g / L, The lead concentration was 78g / L; after the filter residue was dried, 1.1g of carbon powder was added, mixed evenly, and smelted in a muffle furnace at 700°C for 30min to obtain 20.85g of lead alloy, and the recovery rate of lead in the filter...

Embodiment 2

[0041] Embodiment 2: present embodiment is to the recovery method of lead in lead plaster, and the steps are as follows:

[0042] (1) After the waste lead-acid battery is crushed, the lead paste part is selected, dried and ground to 200 mesh to obtain the lead paste powder;

[0043] (2) Take by weighing 240g sodium hydroxide, 150g tartaric acid and add in 1.5L water (the weight ratio of water, sodium hydroxide, tartaric acid is 100:16:10), stir and dissolve, obtain leachate;

[0044] (3) Add 300g of lead plaster powder into the leachate, dissolve, react at 98°C with a stirring speed of 300r / min for 1h, and filter to obtain an electrolyte, wherein the concentration of tartaric acid is 100g / L, and the concentration of sodium hydroxide is 160g / L. The lead concentration was 125g / L; after the filter residue was dried, 2.4g of carbon powder was added, mixed evenly, and smelted in a muffle furnace at 650°C for 30min to obtain 32.93g of lead alloy, and the recovery rate of lead in the...

Embodiment 3

[0048] Embodiment 3: present embodiment is to the recovery method of lead in lead plaster, and the steps are as follows:

[0049] (1) select the lead paste part after crushing the waste lead-acid battery, dry and grind to 300 mesh, and obtain the lead paste powder;

[0050] (2) Take by weighing 180g sodium hydroxide, 210g tartaric acid and add in 1.5L water (the weight ratio of water, sodium hydroxide, tartaric acid is 100:12:14), stir and dissolve, obtain leachate;

[0051] (3) Add 250g of lead plaster powder into the leachate, dissolve, react at 70°C with a stirring speed of 400r / min for 5h, and filter to obtain an electrolyte solution, wherein the concentration of tartaric acid is 140g / L, and the concentration of sodium hydroxide is 120g / L. The lead concentration was 102g / L; after the filter residue was dried, 1.9g of carbon powder was added, mixed evenly, and smelted in a muffle furnace at 700°C for 30min to obtain 27.6g of lead alloy, and the recovery rate of lead in the ...

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Abstract

The invention discloses a method for recovering lead in lead plaster of waste lead-acid storage batteries. The method includes leaching lead oxide and lead sulfate in the lead plaster by heating mixed solution of sodium hydroxide and tartaric acid, directly leaching lead dioxide, and then electrolyzing through heating. The processes of desulfuration and reduction transformation are omitted, and the procedure of the method is short. Purity of cathode lead is higher than 99.5%, and recovery rate of combined lead in the lead plaster is higher than 98.5%. A cathode used is in the shape of a plate and easy to clean and can be used for ingot casting directly due to the fact that the cathode adsorbs little electrolyte.

Description

technical field [0001] The invention belongs to the field of lead recovery of waste lead-acid batteries, and relates to a method for recovering lead in lead paste of waste lead-acid batteries. Background technique [0002] With the rapid development of the automobile and communication industries, the demand for lead-acid batteries continues to increase. At present, about 70% of the lead in the world's refined lead consumption is used for the production of batteries, accompanied by a large amount of waste lead-acid batteries. In order to save the increasingly depleted mineral resources and avoid the environmental pollution caused by waste lead materials, the recycling of waste lead-acid batteries has become an indispensable and important part of the sustainable development strategy of the lead industry at home and abroad. Due to the complex composition of lead in waste lead-acid batteries. Contains PbO, PbO in addition to metal Pb 2 and PbSO 4 , the regeneration process is...

Claims

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Application Information

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IPC IPC(8): C25C1/18C22B3/12
CPCY02P10/20
Inventor 刘伟周琼华姚怀陈艳芳刘海洋
Owner HENAN UNIV OF SCI & TECH
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