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Method for directly and cyclically recovering and utilizing phosphoric acid waste lead mud of lead-acid storage battery

A lead-acid battery, recycling technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of non-compliance with green economy, difficult crushing, long processing time, etc., to achieve waste recycling, The effect of reducing production cost and easy separation

Inactive Publication Date: 2017-01-04
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Does not meet the requirements of the green economy
And after drying, the lead slime itself is relatively fine, coupled with consistent immersion in sulfuric acid, it is bound to be settled and hardened in the drying stage, which brings greater difficulty in the crushing stage and causes dust pollution
Moreover, the processing time of the modification method is long, and it is basically impossible for general battery manufacturers to realize 100% recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of method for the direct recycling of lead-acid accumulator drenched acid waste lead mud, the steps are as follows:

[0028] (1) Recycling of waste lead sludge: the waste acid produced after acid leaching of coated panels is classified according to the positive and negative electrodes, and press-filtered respectively to obtain the positive electrode acid leached waste lead sludge and the negative electrode acid leached waste lead sludge;

[0029] (2) Determination of lead sulfate content: take 5g of acid-leached waste lead sludge samples and dry them to obtain the content of lead sulfate in the positive pole acid-leached waste lead sludge and the content of lead sulfate in the negative pole-leached waste lead sludge.

[0030] (3) Desulfurization: The positive electrode acid-leached waste lead sludge and the negative electrode acid-leached waste lead sludge are respectively mixed with a sodium hydroxide solution with a mass concentration of 30% to perform a desulfu...

Embodiment 2

[0034] A kind of method for the direct recycling of lead-acid accumulator drenched acid waste lead mud, the steps are as follows:

[0035] (1) Recycling of waste lead sludge: the waste acid produced after acid leaching of coated panels is classified according to the positive and negative electrodes, and press-filtered respectively to obtain the positive electrode acid leached waste lead sludge and the negative electrode acid leached waste lead sludge;

[0036] (2) Determination of lead sulfate content: take 1g of acid-leached waste lead sludge sample and dry it to obtain the content of lead sulfate in the positive pole acid-leached waste lead mud and the content of lead sulfate in the negative pole-leached waste lead mud.

[0037](3) Desulfurization: the positive pole acid-leached waste lead mud and the negative pole acid-leached waste lead mud are mixed with sodium hydroxide solution with a mass concentration of 10% respectively, and then the desulfurization reaction is carrie...

Embodiment 3

[0041] A kind of method for the direct recycling of lead-acid accumulator drenched acid waste lead mud, the steps are as follows:

[0042] (1) Recycling of waste lead sludge: the waste acid produced after acid leaching of coated panels is classified according to the positive and negative electrodes, and press-filtered respectively to obtain the positive electrode acid leached waste lead sludge and the negative electrode acid leached waste lead sludge;

[0043] (2) Determination of lead sulfate content: Take 1g of acid-leached waste lead sludge sample and dry it to obtain the content of lead sulfate in the positive pole acid-leached waste lead mud and the content of lead sulfate in the negative pole-leached waste lead mud.

[0044] (3) Desulfurization: the positive electrode acid-leached waste lead sludge and the negative electrode acid-leached waste lead sludge are mixed with sodium hydroxide solution with a mass concentration of 20% respectively, and then the desulfurization r...

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PUM

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Abstract

The invention discloses a method for directly and cyclically recovering and utilizing phosphoric acid waste lead mud of a lead-acid storage battery. The method comprises the main steps of (1) recovering waste lead mud; (2) determining the content of lead sulfate in the phosphoric acid waste lead mud; (3) performing desulfurization; (4) performing solid and liquid separation; (5) performing cyclical utilization: positive electrode recovery lead mud is added into a positive electrode paste mixing machine to be cyclically utilized; negative electrode recovery lead mud is added into a negative electrode paste mixing machine to be cyclically utilized. The method has the advantages that the method is simple and is easy to implement; the required time is short; the product is uniform and stable; the purity is high; the problem of impurity pollution cannot be caused; no any adverse influence is caused on the battery performance.

Description

technical field [0001] The invention relates to the technical field of lead-acid storage battery production, in particular to a method for direct recycling and utilization of waste lead sludge soaked in lead-acid storage battery. Background technique [0002] Now in the production of lead-acid batteries, the plates will go through the stages of coating, soaking acid and curing. During the acid-leaching stage of the pole plate, a small part of the paste on the surface of the pole plate will fall into the acid-leaching tank. The lead sludge on the pole plate cannot be recycled, and will be collected uniformly and sold to lead recycling companies. However, in the production process of lead-acid batteries, the process is strictly controlled, which also contributes to the uniformity and stability of the waste lead paste produced. The waste lead plaster contains lead oxide, lead sulfate, elemental lead and moisture, and also contains a small amount of lead-acid battery formula. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 王江林马永泉周丽项晨吴鑫代少振
Owner CHAOWEI POWER CO LTD
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