Recycle method of waste lead-acid cell

A lead-acid battery, recycling technology, applied in the direction of battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of expensive citric acid and sodium citrate, technical and economical existence, etc., to achieve low production costs, retain Availability, high cost-effective effect

Active Publication Date: 2013-07-31
JIANGSU HUAFU STORAGE NEW TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main problems of this process is that hydrogen peroxide needs to be added as a reducing agent when dealing with lead dioxide, and the citric acid and sodium citrate used are relatively expensive.
So there is a problem with techno-economics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Desulfurization with carbonate, then burning in air

[0037] Treat the negative electrode powder obtained from waste lead-acid batteries with a carbonate (ammonium salt or sodium salt) solution with a concentration of 0.5 ~ 1.0 mol / L at room temperature ~ 100 ° C, so that PbSO in the negative electrode powder 4 All converted to PbCO 3 .

[0038] The desulfurized negative electrode powder was placed in a crucible, and then heated in a muffle furnace at 200 °C to 500 °C for 1 to 4 h to obtain PbO powder containing a certain amount of metallic lead. By changing the calcination temperature and time, a specific crystal phase composition (referring to Pb, a- or b-PbO, Pb 3 o 4 and so on) of PbO powder.

Embodiment 2

[0039] Embodiment 2: desulfurize with sodium hydroxide, burn in air then

[0040] Treating the negative electrode powder obtained from waste lead-acid batteries with a mass ratio concentration of 20% to 40% sodium hydroxide at room temperature ~ 120 ° C can make the PbSO in the negative electrode powder 4 All converted to Pb(OH) 2 .

[0041] Burning in air is similar to above.

[0042] 2. Processing method of positive electrode powder

Embodiment 3

[0043] Example 3 : Desulfurization with carbonate followed by reduction with activated carbon

[0044] First, desulfurize the positive electrode powder obtained from waste lead-acid batteries at room temperature ~ 120 °C with a concentration of 0.5 ~ 1.0 mol / L carbonate (ammonium salt or sodium salt) solution, which can make the PbSO in the positive electrode powder 4 All converted to PbCO 3 .

[0045] Add an appropriate amount of activated carbon powder to the obtained desulfurized sample, and calcinate it in a muffle furnace at 300 °C to 700 °C for 1 to 5 h to obtain lead oxide powder. The phase composition of the lead oxide powder (such as Pb, α- and β-PbO, Pb 2 o 3 , Pb 3 o 4 etc.) is determined by the content of activated carbon powder, burning temperature and time.

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PUM

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Abstract

The invention provides a recycle method of a waste lead-acid cell. The recycle method comprises the following steps: (1) cutting the waste lead-acid cell, detaching so as to obtain a positive plate, a negative plate, an electrolyte sulfuric acid and a plastic shell, and respectively treating the positive plate and the negative plate, thereby obtaining a positive pole powder, a negative pole powder, a positive pole lead alloy grate and a negative pole lead alloy grate; (2) desulfurating the negative pole powder, and then heating in the air at the temperature of 200 DEG C-500DEG C so as to generate the negative pole powder with a good electrochemical activity; (3) desulfurating the positive pole powder, and then reducing the desulfurated positive pole powder with a reducing agent at the temperature of 300 DEG C-700DEG C so as to obtain the positive pole powder with the good electrochemical activity; and (4) producing a novel lead-acid cell by using the obtained positive pole powder and negative pole powder. The recycle method provided by the invention has the advantage of realizing the circulatory production of lead-acid cells.

Description

technical field [0001] The invention relates to a cycle production method of a lead-acid battery, the purpose of which is to chemically process positive and negative active materials of waste batteries to obtain positive and negative active materials which can be used to produce new lead-acid batteries according to the existing technology. Background technique [0002] Lead-acid battery is a rechargeable battery, which is cheap, easy to maintain, and can meet the needs of various users. It has been widely used in uninterruptible power supplies, battery cars, car starting power supplies, and electric bicycles. Lead-acid batteries contain a large amount of lead that is harmful to the environment and human body, and also contain some highly corrosive sulfuric acid. After the service life is reached, if it is not properly disposed of, it will cause serious environmental pollution. [0003] Relevant statistics show that the output of lead ranks fourth among non-ferrous metals. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 雷立旭高鹏然戴源
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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