Method for recycling lead plaster from waste lead storage battery

A lead-acid battery and waste technology, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of difficult collection by hood-type cloth bag dust collectors, physical health injuries of workers, and large energy consumption in smelting, and achieve environmental protection. The effect of friendliness, high conversion rate and simple conversion process

Inactive Publication Date: 2012-01-04
重庆市铜梁区诚信电极板厂
View PDF0 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mass content of lead sulfate in lead paste reaches 40%-80%. The current process of converting PbSO4 in lead paste to lead carbonate is to combine lead paste with carbonate or acid carbonic acid Salt converts PbSO4 into lead carbonate. During the conversion, various additives are added to the carbonate or acid carbonate, but the conversion rate is still only 85%-90%, which leads to the reduction due to conversion There is still a small amount of PbSO4 in the final lead paste, so the temperature in the general furnace cannot be lower than 1000°C. On the one hand, a large amount of metal iron filings still need to be added in the reduction production process to reduce PbSO4PbS generated after thermal decomposition;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Take the waste lead storage battery (100 kg), cut, crush and sort to obtain 46.8 kg of lead paste, the main components of which are lead sulfate, lead oxide and lead dioxide, of which the mass content of lead sulfate is 77%.

[0032] 2. The separated lead paste is crushed to a particle size of 160-200 mesh; the crushed lead paste is added to a saturated solution of 19.57kg NH4HCO3 (ammonium bicarbonate excess 4%), stirred and reacted for 1h to make the lead The lead sulfate in the paste is converted into lead carbonate. The conversion rate of lead sulfate is found to be 99.6% after testing. The reaction equation is:

[0033] PbSO 4 + 2NH 4 HCO 3 → PbCO 3 + (NH 4 ) 2 SO 4 +CO 2 ↑+H 2 O

[0034] Stop the reaction; filter with suction, wash the filter cake with 113.8kg of distilled water to neutrality to obtain a wet product, then put the wet product in an oven and bake at 150℃ for 2 hours to obtain a sample; add NH to the filtrate 4 HCO 3 After reaching saturation, a satur...

Embodiment 2

[0050] 1. Take the waste lead storage battery (100 kg), cut, crush and sort to obtain 46.2 kg of waste lead paste, the main components of which are lead sulfate, lead oxide and lead dioxide, of which the mass content of lead sulfate is 77%.

[0051] 2. Crush the separated lead paste to a particle size of 160-200 mesh; add the crushed lead paste to the saturated secondary ammonium bicarbonate solution obtained in Example 1, and stir for 1.5 hours to make the Lead sulfate is converted into lead carbonate. The conversion rate of lead sulfate is 99.58%. The reaction equation is:

[0052] PbSO 4 + 2NH 4 HCO 3 → PbCO 3 + (NH 4 ) 2 SO 4 +CO 2 ↑+H 2 O

[0053] The reaction was stopped; suction filtration, the filter cake was washed with the secondary washing liquid in Example 1 to neutrality to obtain a wet product, and the content of sulfate in the wet product did not increase after testing. Then put the wet product in an oven and bake at 150°C for 2.5 hours to obtain a sample; continue...

Embodiment 3

[0068] 1. Take the waste lead storage battery (100 kg), cut, crush and sort to obtain 46.8 kg of lead paste, the main components of which are lead sulfate, lead oxide and lead dioxide, of which the mass content of lead sulfate is 77%.

[0069] 2. The separated lead paste is crushed to a particle size of 160-200 mesh; the crushed lead paste is added to a saturated solution of 19.57kg NH4HCO3 (ammonium bicarbonate excess 4%), stirred and reacted for 1h to make the lead The lead sulfate in the paste is converted into lead carbonate. The conversion rate of lead sulfate is found to be 99.6% after testing. The reaction equation is:

[0070] PbSO 4 + 2NH 4 HCO 3 → PbCO 3 + (NH 4 ) 2 SO 4 +CO 2 ↑+H 2 O

[0071] Stop the reaction; filter with suction, wash the filter cake with 113.8kg of distilled water to neutrality to obtain a wet product, then put the wet product in an oven and bake at 150℃ for 2 hours to obtain a sample; add NH to the filtrate 4 HCO 3 After reaching saturation, a satur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for recycling lead plaster from a waste lead storage battery. The method is implemented by the following steps of: (1) crushing the lead plaster separated from the waste lead storage battery into particle sizes of 160 to 220 meshes; (2) adding the crushed lead plaster into saturated solution of NH4HCO3, reacting the lead plaster with the solution of NH4HCO3 under stirring to convert lead sulfate in the lead plaster into lead carbonate, and stopping reaction; (3) performing suction filtration, washing a filter cake to be neutral by using distilled water to obtain a wet product, placing the wet product into a drying oven for drying under the condition of 150 DEG C to obtain a sample, and adding NH4HCO3 into filtrate until the mixed solution is saturated for the treatment of lead plaster of the next batch; and (4) heating the sample obtained by the step (3) to 250 to 350 DEG C, preserving heat for 1 to 1.5h to completely dissolve lead dioxide into lead oxide, heating the sample to 350 to 450 DEG C, and preserving the heat for 3 to 4h to completely dissolve the lead carbonate to obtain yellow lead.

Description

technical field [0001] The invention relates to a method for recycling waste lead storage batteries, in particular to a method for recycling lead paste in waste lead storage batteries. Background technique [0002] my country's secondary lead industry has gradually developed under the condition of emphasizing environmental protection and resource comprehensive utilization policy requirements. With the rapid development of my country's automobile, communication and chemical industries, the requirements for lead continue to increase, and the secondary lead industry has become an indispensable and important part of the sustainable development strategy of the lead metal industry. [0003] At the same time, lead is a metal harmful to the environment and human health. If various lead wastes are not recycled, they will become a source of environmental pollution. Especially for waste batteries, only when they are fully recycled can the lead paste and sulfuric acid in them be avoide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 刘悉承
Owner 重庆市铜梁区诚信电极板厂
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap