Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for wet recovery of high-purity lead oxide from waste lead paste of lead-acid storage batteries

A technology for lead-acid batteries and waste lead-acid batteries, applied in battery recycling, recycling by waste collectors, recycling technology, etc., can solve the problem of high energy consumption and achieve a high recovery rate

Active Publication Date: 2017-01-11
CHAOWEI POWER CO LTD
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method adopts a dry roasting process to prepare lead oxide, and the energy consumption is high

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] A method for reclaiming high-purity lead oxide by a wet method of lead-acid battery waste lead paste, the steps are as follows:

[0032] (1) Connect waste lead-acid batteries in series and charge them. The charging parameters are: current 0.2C, voltage limit 15v / pc, charging 10h. Then the waste lead-acid battery is crushed to separate lead paste, waste acid, lead grid, plastic, etc.; waste acid, lead grid, plastic, etc. are recycled and processed separately.

[0033] (2) Wash the lead plaster with pure water to pH=7-9, press filter, detect the composition of the lead plaster, and obtain the PbO in the lead plaster 2 , the content of lead and lead sulfate (the content of PbO2 in the lead plaster after charging is 50%, lead is 45%, and lead sulfate is about 5%).

[0034] (3) Mix the lead plaster with 5wt% sodium hydroxide solution for desulfurization reaction, the amount of sodium hydroxide solution is to control the molar ratio of sodium hydroxide: lead sulfate in the l...

Embodiment 2

[0039] A method for reclaiming high-purity lead oxide by a wet method of lead-acid battery waste lead paste, the steps are as follows:

[0040] (1) Connect waste lead-acid batteries in series and charge them. The charging parameters are: current 0.2C, voltage limit 15v / pc, charging 10h. Then the waste lead-acid battery is crushed to separate lead paste, waste acid, lead grid, plastic, etc.; waste acid, lead grid, plastic, etc. are recycled and processed separately.

[0041] (2) Wash the lead plaster with pure water to pH=7-9, press filter, detect the composition of the lead plaster, and obtain the PbO in the lead plaster 2 , the content of lead and lead sulfate (the content of PbO2 in the lead plaster after charging is 50%, lead is 45%, and lead sulfate is about 5%).

[0042] (3) Mix the lead plaster with 10wt% sodium hydroxide solution for desulfurization reaction, the amount of sodium hydroxide solution is to control the molar ratio of sodium hydroxide: lead sulfate in the ...

Embodiment 3

[0047] A method for reclaiming high-purity lead oxide by a wet method of lead-acid battery waste lead paste, the steps are as follows:

[0048] (1) Connect waste lead-acid batteries in series and charge them. The charging parameters are: current 0.2C, voltage limit 15v / pc, charging 10h. Then the waste lead-acid battery is crushed to separate lead paste, waste acid, lead grid, plastic, etc.; waste acid, lead grid, plastic, etc. are recycled and processed separately.

[0049] (2) Wash the lead plaster with pure water to pH=7-9, press filter, detect the composition of the lead plaster, and obtain the PbO in the lead plaster 2 , the content of lead and lead sulfate (the content of PbO2 in the lead plaster after charging is 50%, lead is 45%, and lead sulfate is about 5%).

[0050] (3) Mix the lead plaster with 10wt% sodium hydroxide solution for desulfurization reaction. The amount of sodium hydroxide solution is controlled by sodium hydroxide: the molar ratio of lead sulfate in t...

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

No PUM Login to View More

Abstract

The invention discloses a method for wet recovery of high-purity lead oxide from waste lead paste of lead-acid storage batteries. The method for wet recovery of the high-purity lead oxide from the waste lead paste of the lead-acid storage batteries comprises the steps that firstly, the waste lead-acid storage batteries are connected in series and charged, and then the lead paste is separated out; secondly, the contents of PbO2, lead and lead sulfate in the lead paste are obtained; thirdly, the lead paste is made to perform a desulfurization reaction; fourthly, the lead paste and acetic acid are mixed and then heated to perform refluxing; fifthly, H2O2 is dropwise added so that excessive PbO2 can be reduced, cooling and filtering are conducted, the pH value of the filter liquor is adjusted to be 6-8 through a sodium hydroxide solution, 30wt% of sodium hydroxide solution is added dropwise, a reaction is performed while stirring is conducted, so that the lead oxide is separated out, the 30wt% of sodium hydroxide solution is dropwise added until no solid is separated out, stirring continues to be conducted, and then a solid-liquid mixture is obtained; and sixthly, the solid-liquid mixture is filtered, filter residues are washed, dried and smashed, and then high-purity lead oxide solid is obtained. The method for wet recovery of the high-purity lead oxide from the waste lead paste of the lead-acid storage batteries saves energy and is environmentally friendly and high in recovery rate. The oxide lead recovered through the method can be directly used for production of the batteries.

Description

technical field [0001] The invention relates to the technical field of lead-acid battery production, in particular to a method for recovering high-purity lead oxide by a wet method from waste lead paste of lead-acid battery. Background technique [0002] At present, the main raw material for lead production is galena with a lead content of more than 50%. With the continuous reduction of mineral resources, the comprehensive recycling and resource utilization of low-grade polymetallic ores and lead-containing wastes have received extensive attention. Recycling Secondary lead has become an indispensable and important part of the sustainable development strategy of the lead industry. At present, the output of secondary lead in western developed countries accounts for about 65% of the total lead output, up to 76.2% in the United States, lower than 30% in developing countries, and 17.5% in my country. The production energy consumption of recovering lead from waste acid storage ba...

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): C22B7/00C22B13/00H01M10/54
CPCC22B7/006C22B13/045H01M10/54Y02P10/20Y02W30/84
Inventor 代少振王江林项晨吴鑫马永泉
Owner CHAOWEI POWER CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com