A method for removing AGM separators from lead-acid battery waste lead plaster

A lead-acid battery, waste technology, applied in the direction of battery recycling, waste collector recycling, recycling technology, etc., can solve problems such as difficult separation, reduce lead recovery rate, increase electrolysis energy consumption, etc., to achieve great economic and technical benefits, The effect of reducing production costs and reliable quality

Active Publication Date: 2018-07-03
CHAOWEI POWER CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in the subsequent electrolytic refining stage, the content of positive electrode slime will be greatly increased, the energy consumption of electrolysis will be increased, and the recovery of other precious metals will be very difficult.
In the wet recycling process, due to the existence of ultra-fine glass fibers, its main component is SiO 2 , forming a eutectic in the roasting stage, increasing its hardness, which brings greater difficulty to the subsequent crushing work and greater difficulty to the lead recovery process
And SiO 2 The introduction of lead will greatly reduce the quality of the product, and will be a great influence factor on the lead recovery process
[0004] In the recycling stage of the existing battery, the crushing equipment basically adopts violent crushing, and the AGM separator, as a part of the battery, has been crushed by the dismantling equipment, and the AGM separator itself has undergone multiple charge and discharge cycles of the battery. It changes its initial performance, causing the AGM separator to become fine cotton, wrapped with waste lead plaster, and it is difficult to separate it by general mechanical methods
For example, the experimental vibrating screen is used to separate the AGM partitions. Generally, the primary vibration and the secondary vibration are used to obtain most of the separation of the AGM partitions. However, the separated AGM partitions still contain more lead paste, which greatly reduces lead recovery. rate, which also has a relatively large negative impact on the environment and production efficiency

Method used

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Experimental program
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Effect test

Embodiment 1

[0025] A kind of method embodiment 1 of removing AGM separator in the waste lead plaster of lead-acid storage battery of the present invention, comprises the following steps successively:

[0026] Step 1, crushing and drying the lead-acid battery to obtain waste lead plaster, accurately weighing the waste lead plaster, and measuring the mass percentage of the AGM separator contained in the waste lead plaster;

[0027] Measure the mass percent of the AGM separator contained in the waste and old plaster by the following steps: add the waste and old plaster that weighs accurately in the conical flask, add the ammonium acetate solution that excess mass concentration is 20%, boil 15min, to remove lead sulfate in waste lead plaster; after the filter residue is washed with pure water, turn back in the above-mentioned Erlenmeyer flask, add excess nitric acid solution and excess hydrogen peroxide, the volume ratio of nitric acid and water in the nitric acid solution is 1:4 , boiled to ...

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Abstract

The invention discloses a method for removing AGM separators from waste lead plaster of lead-acid batteries, belongs to the technical field of lead-acid batteries, and solves the problem that in the recovery stage of batteries in the prior art, recycling and crushing equipment are violently disassembled, so that AGM separators It is difficult to separate the board and waste lead plaster, which greatly reduces the technical problem of lead recovery rate. The invention includes crushing, drying and weighing the lead-acid storage battery, measuring the mass percentage of the AGM separator contained in the waste lead plaster; then adding the sodium hydroxide solution into the reaction kettle; Finally, take out the reaction material, press filter, complete the solid-liquid separation, and obtain the filter cake and filtrate; the filter cake is washed with pure water, the lye in the filter cake and the silicate generated are cleaned, and dried; the filtrate is washed with There are five steps of washing the desulfurization solution to precipitate silicate and recycling the alkali solution.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and relates to a method for removing AGM separators from waste lead paste of lead-acid batteries. Background technique [0002] Ultrafine glass fiber separator, commonly known as AGM separator. AGM separators are mainly made of glass fibers with different degrees of decomposition, and are manufactured by wet papermaking technology according to different proportions. As an indispensable material in valve-regulated lead-acid batteries, they bring more benefits to the batteries. The main functions of AGM separators for valve-regulated lead-acid batteries are: (1) to prevent the positive / negative plates from contacting each other and cause internal short circuit of the battery; (2) to make the battery tightly assembled and reduce the battery volume; (3) to prevent the deformation of the plates , bending and active material falling off; (4) as a porous separator between the plates, which ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor王江林蔡晓祥周丽代少振项晨吴鑫
OwnerCHAOWEI POWER CO LTD