Method for recycling waste lead storage battery

A lead-acid battery and waste technology, which is applied to the recycling and utilization field of waste lead-acid battery, can solve the problems of high cost, difficult waste water treatment, complex sulfate composition, etc., and achieves low recovery cost, improved resource utilization rate, and easy disposal. Effect

Inactive Publication Date: 2012-01-04
重庆市铜梁区诚信电极板厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon existing methods by reducing harmful emissions such as hydrogen cyanide (HCN), nitrogen oxidants (NOx). By controlling these factors, this new approach simplifies the manufacturing processes while maintaining good quality products with minimal amounts of hazardous materials like H2S and NO2. Additionally, the inventors have developed an efficient separation technique called Lead Nano Parlelets, making them suitable for various applications including electronic components and batteries made through different ways. Overall, they provide effective solutions towards producing clean lead solder and pure nickel cathode material.

Problems solved by technology

Technologies aimed towards improving the reuse of lead battery cranes have been discussed throughout the worldwide technical problem addressed in these inventions: Current methods involve collecting spent lead-based batteries without reusing their resources effectively due to economic factors like increasing demand over generators and reducing emissions caused by combustion engines. Additionally, current processes require expensive metallurgery steps during manufacturing, leading to increased greenhouse gases emission levels associated with disposal of lead scrap.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take waste lead-acid batteries (100 kg) through mechanical cutting, crushing and sorting, and separate waste electrolyte, plastic, lead nails and lead paste; the above steps collected a total of 12 kg of waste electrolyte, 7 kg of plastic, and lead nails 34.2kg of lead weights, of which lead nails and lead weights are mainly from the battery grid, poles and connecting plates of lead-acid batteries, 46.8kg of waste lead paste, whose main components are lead sulfate, lead oxide and lead dioxide, of which the mass of lead sulfate The content is 77%.

[0038] (2) The waste electrolyte was filtered by precipitation to obtain 0.12 kg of filter residue, which was mixed with lead plaster, and the filtrate was processed by vapor-liquid separation non-volatile solution concentration method to obtain 6.08 kg of concentrated sulfuric acid with a concentration of 98%; its preparation The specific process steps are: put the waste dilute sulfuric acid from the storage tank into th...

Embodiment 2

[0058] (1) Take the waste lead-acid battery (100 kg) through mechanical cutting, crushing and sorting, and separate the waste electrolyte, plastic, lead nails and lead paste; the above steps collected a total of 13.8kg of waste electrolyte, 6.5kg of plastic, 33.5 kg of lead nails and lead weights, of which the lead nails and lead weights mainly come from the battery grid, poles and connecting plates of lead-acid batteries, and 46.2 kg of waste lead paste, whose main components are lead sulfate, lead oxide and lead dioxide, of which lead sulfate The mass content is 77%.

[0059] (2) The waste electrolyte was filtered by precipitation to obtain 0.2 kg of filter residue, which was mixed with lead plaster, and the filtrate was processed by a vapor-liquid separation type non-volatile solution concentration method to obtain 6.2 kg of concentrated sulfuric acid with a concentration of 98%; its preparation The specific process steps are: put the waste dilute sulfuric acid from the sto...

Embodiment 3

[0079] 1. Take waste lead-acid batteries (100 kg) and mechanically cut, crush and sort to obtain 46.8 kg of lead paste. The main components are lead sulfate, lead oxide and lead dioxide, and the mass content of lead sulfate is 77%.

[0080] 2. Crush the separated lead paste to a particle size of 160-200 mesh; add the crushed lead paste to 19.57kg NH 4 HCO 3 (Excess ammonium bicarbonate 4%), stirred and reacted for 1 hour, so that the lead sulfate in the lead plaster was converted into lead carbonate. After testing, it was found that the conversion rate of lead sulfate was 99.6%. The reaction equation is:

[0081] PbSO 4 + 2NH 4 HCO 3 → PbCO2 3 +(NH 4 ) 2 SO 4 +CO 2 ↑+H 2 o

[0082] Stop the reaction; filter with suction, wash the filter cake with 113.8kg of distilled water until neutral to obtain a wet product, then put the wet product in an oven, and dry it at 150°C for 2 hours to obtain a sample; add NH to the filtrate 4 HCO 3 Obtain secondary ammonium bicarbo...

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Abstract

The invention discloses a method for recycling a waste lead storage battery. The method comprises the following steps of: cutting, crushing and separating the waste lead storage battery to separate waste electrolyte, plastics, lead nails, lead pigs and lead plaster; precipitating and filtering the waste electrolyte to obtain a concentrated sulfuric acid; melting the lead nails and the lead pigs at low temperature, adding antimony, tin and selenium into melt to obtain a lead-based alloy; and preparing yellow lead or red lead directly from the lead plaster at low temperature, and preparing plastic grains from the plastics.

Description

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Claims

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Application Information

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Owner 重庆市铜梁区诚信电极板厂
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