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A method for directly wet-preparing PBO from waste lead-acid batteries

A lead-acid battery, lead-acid battery technology, applied in the directions of lead monoxide, battery recycling, lead oxide, etc., can solve the problems of fewer steps, lead recovery efficiency, raw material consumption, and many steps, so as to reduce raw material and energy consumption, step Few, easy-to-use effects

Active Publication Date: 2017-07-14
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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  • A method for directly wet-preparing PBO from waste lead-acid batteries

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Experimental program
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Effect test

Embodiment 1

[0035] (1) Charge the used lead-acid battery at 2.45V / full charge for 5 hours at a current limit of 0.02C at room temperature, so that most of the active material in the negative electrode plate of the battery is converted to lead Pb, the active material in the positive electrode plate Mostly converted to PbO 2 Use mechanical dismantling methods 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 lead paste and waste grids are crushed and sieved with a 100-mesh stainless steel screen. The larger lead paste particles are continuously transferred to the pulverizer for crushing until all the lead paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are thoroughly mixed in solid phase.

[0036] (2) Take 1kg of the mixture of lead paste and lead grid powder, slowly raise the temperature to 150℃ unde...

Embodiment 2

[0040] (1) Charge the used lead-acid battery at 2.45V / full charge at normal temperature and limit the current to 0.02C for 6 hours, so that most of the active material in the negative electrode plate of the battery is converted to lead Pb, the active material in the positive electrode plate Mostly converted to PbO 2 ; Use mechanical disassembly or crushing and sorting methods 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 lead paste and waste grids are crushed and sieved with a 100-mesh stainless steel screen. The larger lead paste particles are continuously transferred to the pulverizer for crushing until all the lead paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are thoroughly mixed in solid phase.

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

Embodiment 3

[0045] (1) Charge the used lead-acid battery at 2.45V / full charge at normal temperature and limit the current to 0.02C for 10 hours, so that most of the active material in the negative electrode plate of the battery is converted to lead Pb, the active material in the positive electrode plate Mostly converted to PbO 2 ; Use mechanical disassembly or crushing and sorting methods 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 lead paste and waste grids are crushed and sieved with a 100-mesh stainless steel screen. The larger lead paste particles are continuously transferred to the pulverizer for crushing until all the lead paste can pass through the screen. The crushed and sieved positive / negative lead paste and lead grid powder are thoroughly mixed in solid phase.

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

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Abstract

The invention proposes a method for directly producing high-purity lead oxide by recycling waste lead-acid batteries, and the chemical raw materials can be recycled. The preparation method of the high-purity PbO powder first fully charges the waste battery, then mixes the positive / negative lead paste and the waste grid lead powder in solid phase, and completely converts the lead in the lead paste to oxidized lead powder by heating and reduction reaction. Lead PbO and PbSO 4 The lead raw material formed; then leached by the mixed solution of acetic acid and acetate, desulfurized with barium acetate by-product barium sulfate, and then sinking lead with lye, directly preparing high-purity PbO products, and the acetate mother liquor can be used for the next Circulation; thereby eliminating the disadvantages of the existing lead oxide synthesis process, such as complicated steps, low purity, and consumption of a large amount of chemical raw materials, and reducing costs, it is a new technology with high-tech added value, energy-saving and environmental protection, and suitable for large-scale industrialization.

Description

Technical field [0001] The invention belongs to the technical field of recycling and regenerating lead from waste lead-acid batteries and lead-containing materials, and particularly relates to a method and application for directly preparing high-purity PbO from waste lead-acid batteries and recycling the chemical raw materials. Background technique [0002] Lead-acid batteries are widely used in power and energy storage fields due to their mature technology, low price and high safety. At present, lead-acid batteries account for more than 50% of the market in terms of output value and sales, and still 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 at an accelerated rate, and the amount of replacement scrap will inevitably i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C01G21/06
CPCY02W30/84
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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