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

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
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Effect test

Example Embodiment

[0034] Embodiment 1: The method for recovering lead in lead paste in this embodiment, the steps are as follows:

[0035] (1) After crushing the waste lead-acid battery, select the lead paste part, dry and grind it to 100 meshes to obtain the lead paste powder;

[0036] (2) Weigh 120g of sodium hydroxide and 150g of tartaric acid into 1.5L of water (the weight ratio of water, sodium hydroxide, and tartaric acid is 100:8:10), stir and dissolve to obtain an extract;

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

Example Embodiment

[0041] Embodiment 2: The method for recovering lead in lead paste in this embodiment, the steps are as follows:

[0042] (1) After crushing the waste lead-acid battery, select the lead paste part, dry and grind it to 200 meshes to obtain the lead paste powder;

[0043] (2) Weigh 240g of sodium hydroxide and 150g of tartaric acid into 1.5L of water (the weight ratio of water, sodium hydroxide, and tartaric acid is 100:16:10), stir and dissolve to obtain an extract;

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

Example Embodiment

[0048] Embodiment 3: The method for recovering lead in lead paste in this embodiment, the steps are as follows:

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

[0050] (2) Weigh 180g of sodium hydroxide and 210g of tartaric acid into 1.5L of water (the weight ratio of water, sodium hydroxide, and tartaric acid is 100:12:14), stir and dissolve to obtain an extract;

[0051] (3) Add 250g of lead paste powder to the leaching solution, dissolve it, react for 5h at a stirring speed of 400r / min at 70°C, and filter to obtain an electrolyte, in which the concentration of tartaric acid is 140g / L, the concentration of sodium hydroxide is 120g / L, The lead concentration is 102g / L; the filter residue is dried and mixed with 1.9g carbon powder, mixed evenly and smelted in a muffle furnace at 700°C for 30 minutes to obtain 27.6g of lead alloy. The recovery rate of lead in the filter residue is 98.4%....

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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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