Method for processing lead-acid accumulators

The technology of a lead-acid battery and a treatment method is applied in the field of lead-acid battery treatment, which can solve the problems of long process flow and waste of resources, and achieve the effects of wide application, reduced process energy consumption, and reduced lead vapor

Inactive Publication Date: 2010-12-01
CHINA ELECTRONICS ENG DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The method has a long technical process and wastes resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 200kg of waste lead-acid batteries were manually disassembled, and the iron (mainly connecting screws, the same below) was removed by magnetic separation, and then put into a crusher for crushing. The average particle size of the crushed material was 30mm, so that The crushed material is passed through a sieve with an aperture of 25 mm to obtain an oversize and an undersize (lead mud). Wash the oversize with 200L of water, and add the washings to the undersize. Use a water separation device to perform water separation on the sieve to obtain lead grids (the lowermost layer during water separation), ABS (acrylonitrile-butadiene-styrene copolymer) (the uppermost layer during water separation) and PVC (polyvinyl chloride) (intermediate layer when water is selected).

[0029] The lead grid is put into a smelting pot at 350°C and smelted for 12 hours to obtain lead liquid, and lead ingots are obtained through ingot casting.

[0030] The sieve contained 90kg of lead sulfate,...

Embodiment 2

[0033] 200kg of waste lead-acid batteries were manually disassembled, and iron was removed by magnetic separation, and then put into a crusher for crushing. The average particle size of the crushed material was below 20 mm, and the crushed material was passed through a sieve with an aperture of 15 mm to obtain a sieve. Top and bottom. Wash the oversize with 300L of water, and mix the washings with the undersize. Use a water separation device to perform water separation on the sieve to obtain lead grids (the lowermost layer during water separation), ABS (the uppermost layer during water separation) and glass fiber (the middle layer during water separation).

[0034] The lead grid is directly put into a smelting pot at 800° C. for smelting for 2 hours, quenched and tempered to obtain a lead alloy liquid, and an alloy lead ingot is obtained through ingot casting.

[0035] The sieve contained 86kg of lead sulfate, 4kg of lead oxide, 5kg of lead powder, water and sulfuric acid.

...

Embodiment 3

[0038] The 200kg waste lead-acid battery was manually disassembled, and the iron was removed by magnetic separation, and then put into a crusher for crushing. The average particle size of the crushed material was below 5 mm, and the crushed material was passed through a sieve with an aperture of 4 mm to obtain a sieve. Top and bottom. Wash the oversize with 100 L of water, and mix the wash with the undersize. Water separation is carried out on the sieve by water separation device to obtain lead grid, ABS and PVC respectively.

[0039] The lead grid is directly put into a smelting pot at 500°C, smelted, quenched and tempered to obtain a lead alloy liquid, and an alloy lead ingot is obtained through ingot casting.

[0040] The sieve contained 90kg of lead sulfate, 5kg of lead oxide, 7kg of lead powder, water and sulfuric acid.

[0041]At room temperature, the undersize was added to the reactor and stirred for 30min, then 14.13kg of sodium hydroxide powder was added (the molar ...

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Abstract

The invention discloses a method for processing lead-acid accumulators, comprising the following steps of breaking and separating the lead-acid accumulators, directly smelting separated lead plate grids in a relatively low-temperature smelting furnace to obtain lead liquid or lead alloy liquid; and generating tribasic lead sulfate chemical products by the reaction of lead slime and alkali. The method does not need to carry out the smelting at high temperature, thus the lead steam is reduced, and the technical wasted energy is also reduced; in addition, the invention does not generate secondary pollution, has simple and environment-friendly technique, is easy to operate and saves energy source.

Description

technical field [0001] The invention relates to a treatment method for lead-acid batteries. Background technique [0002] Lead-acid batteries are widely used and can power a variety of products. The lead-acid battery is composed of positive and negative plates, separators, shells, electrolytes and terminal heads, etc. The active materials of the positive plates (lead dioxide and lead) and the active materials of the negative plates (sponge-like pure lead) are in the electrolyte. The chemical reaction of discharge is carried out under the action of (dilute sulfuric acid solution). [0003] Lead-acid batteries contain electrolyte solutions such as heavy metal lead and acid. Improper handling will become a new source of environmental pollution, which will pose a serious threat to ecological balance and human health. The secondary pollution caused by the imperfect treatment process of lead-acid batteries has become a key problem restricting its application. Therefore, strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/00
Inventor 穆京祥韩业斌陈利杨敬增丁涛廉启合
Owner CHINA ELECTRONICS ENG DESIGN INST
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