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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method adopts a dry roasting process to prepa

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0030] Example 1:

[0031] A method for wet recovery of high-purity lead oxide from waste lead paste of lead-acid batteries, the steps are as follows:

[0032] (1) Connect the waste lead-acid battery in series and charge it. The parameters of the charging process are: current 0.2C, voltage limit 15v / pc, and charging for 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 paste with pure water to pH=7-9, filter by pressure, and test the components of the lead paste to obtain PbO in the lead paste. 2 , lead and lead sulfate content (PbO2 content in lead paste after charging is 50%, lead 45%, lead sulfate about 5%).

[0034] (3) Mix the lead paste with 5wt% sodium hydroxide solution to carry out the desulfurization reaction. The amount of sodium hydroxide solution is controlled by the molar ratio of sodium hydroxide: ...

Example Embodiment

[0038] Example 2:

[0039] A method for wet recovery of high-purity lead oxide from waste lead paste of lead-acid batteries, the steps are as follows:

[0040] (1) Connect the waste lead-acid battery in series and charge it. The parameters of the charging process are: current 0.2C, voltage limit 15v / pc, and charging for 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 paste with pure water to pH=7-9, filter by pressure, and test the components of the lead paste to obtain PbO in the lead paste. 2 , lead and lead sulfate content (PbO2 content in lead paste after charging is 50%, lead 45%, lead sulfate about 5%).

[0042] (3) The lead paste is mixed with 10wt% sodium hydroxide solution for desulfurization reaction. The amount of sodium hydroxide solution is controlled by the molar ratio of sodium hydroxide: lead su...

Example Embodiment

[0046] Example 3:

[0047] A method for wet recovery of high-purity lead oxide from waste lead paste of lead-acid batteries, the steps are as follows:

[0048] (1) Connect the waste lead-acid battery in series and charge it. The parameters of the charging process are: current 0.2C, voltage limit 15v / pc, and charging for 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 paste with pure water to pH=7-9, filter by pressure, and test the components of the lead paste to obtain PbO in the lead paste. 2 , lead and lead sulfate content (PbO2 content in lead paste after charging is 50%, lead 45%, lead sulfate about 5%).

[0050] (3) The lead paste is mixed with 10wt% sodium hydroxide solution for desulfurization reaction. The amount of sodium hydroxide solution is controlled to the molar ratio of sodium hydroxide: lead su...

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PUM

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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

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Application Information

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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
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