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Method for preparing PbO from waste lead-acid battery by using direct wet method

A technology of lead-acid batteries and lead-acid batteries, which is applied in the direction of lead monoxide, battery recycling, lead oxide, etc., can solve the problems of lead recovery efficiency with few steps, raw material consumption, and large energy consumption, so as to reduce raw material and energy consumption, Fewer steps and high product purity

Active Publication Date: 2015-03-04
中国人民解放军军事科学院防化研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of many steps, raw material consumption and energy consumption in the existing process for preparing lead oxide from regenerated lead, the present invention proposes and designs a new process for directly producing high-purity lead oxide by first dissolving lead and then precipitating lead. It can be directly used in the preparation of lead-acid battery electrodes. This method not only avoids the problems existing in the traditional pyrometallurgy of lead, but also has fewer steps, simple operation, high product purity, and high lead recovery efficiency. The chemical raw materials used can be recycled and energy-saving. , environmental protection, high efficiency and low cost

Method used

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  • Method for preparing PbO from waste lead-acid battery by using direct wet method

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Experimental program
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Effect test

Embodiment 1

[0035] (1) Under normal temperature, the waste lead-acid battery is fully charged with 2.45V / , and the current limiting 0.02C is charged for 5 hours, so that most of the active material in the negative plate of the battery is changed to lead Pb, and the active material in the positive plate is Mostly converted to PbO 2 ; The method of mechanical dismantling is used to separate and sort the above-mentioned fully charged waste lead-acid batteries to obtain lead paste, grids, waste sulfuric acid, separators and shells. The separated positive / negative electrode paste and waste grids are crushed and screened with a 100-mesh stainless steel screen, and the larger paste particles are continuously transferred to the pulverizer for crushing until all the paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are fully mixed in solid phase.

[0036] (2) Take 1kg of lead paste and lead grid powder mixture, slowly heat up to 150°C unde...

Embodiment 2

[0040] (1) Under normal temperature, the waste lead-acid battery is fully charged with 2.45V / , and the current limiting 0.02C is charged for 6 hours, so that most of the active material in the negative plate of the battery is changed to lead Pb, and the active material in the positive plate is Mostly converted to PbO 2 ; The method of mechanical dismantling or crushing and sorting is used to separate and sort the above-mentioned fully charged waste lead-acid batteries to obtain lead paste, grids, waste sulfuric acid, separators and shells. The separated positive / negative electrode paste and waste grids are crushed and screened with a 100-mesh stainless steel screen, and the larger paste particles are continuously transferred to the pulverizer for crushing until all the paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are fully mixed in solid phase.

[0041] (2) Take 1kg of lead paste and lead grid powder mixture, slow...

Embodiment 3

[0045] (1) Under normal temperature, the waste lead-acid battery is fully charged with 2.45V / , and the current limiting 0.02C is charged for 10 hours, so that most of the active material in the negative plate of the battery is changed to lead Pb, and the active material in the positive plate is Mostly converted to PbO 2 ; The method of mechanical dismantling or crushing and sorting is used to separate and sort the above-mentioned fully charged waste lead-acid batteries to obtain lead paste, grids, waste sulfuric acid, separators and shells. The separated positive / negative electrode paste and waste grids are crushed and screened with a 100-mesh stainless steel screen, and the larger paste particles are continuously transferred to the pulverizer for crushing until all the paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are fully mixed in solid phase.

[0046] (2) Take 1kg of lead paste and lead grid powder mixture, slo...

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Abstract

The invention provides a method for recovering waste lead-acid batteries to directly produce high-purity lead oxide, wherein the utilized chemical raw materials can be recycled. The preparation method of a high-purity PbO powder comprises the steps of fully charging a waste battery, performing solid-phase mixing on positive / negative lead plaster and waste grid lead powder, and completely converting lead in the lead plaster to lead raw materials consisting of lead oxide PbO and PbSO4 by heating and reduction reaction; leaching by using a mixed liquid of acetic acid and acetate, desulfuring by using byproduct barium sulfate of barium acetate, depositing lead in an alkali liquid to directly obtain the high-purity PbO products, wherein the acetate mother liquid can be used for the next circulation; therefore, the defects that steps of the current lead oxide synthesis process are complex, the purity is low, and a large amount of chemical raw materials is consumed are overcome; the cost is reduced; the technical value-added is high; the energy conservation and environment friendliness are provided; and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of recovering lead from waste lead-acid batteries and lead-containing materials, and in particular relates to a method and application for directly preparing high-purity PbO from waste lead-acid batteries and recyclable chemical raw materials. Background technique [0002] Lead-acid batteries are widely used in the field of power and energy storage due to their mature technology, low price and high safety. At present, lead-acid batteries occupy more than 50% of the market in terms of output value and sales, and also maintain an average annual growth rate of about 5%. Therefore, about 75% of refined lead in the world is used to make lead-acid batteries. With the rapid development of automobiles, electric bicycles, communications and large-scale energy storage industries, the demand for lead-acid batteries will increase rapidly, and the amount of replacement and scrap will inevitably increase accordingly; at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C01G21/06
CPCY02W30/84H01M10/54C01G21/06
Inventor 文越华程杰何柯孙达洲曹高萍杨裕生
Owner 中国人民解放军军事科学院防化研究院
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