Method for preparing tetrabasic lead sulfate from waste lead plaster

A technology of four-basic lead sulfate and waste lead paste, applied in the direction of lead sulfate, recycling by waste collectors, recycling technology, etc., can solve the problems of restrictions on four-basic lead sulfate, achieve low cost, good consistency, and economical High benefit effect

Active Publication Date: 2016-03-09
TIANNENG BATTERY GRP ANHUI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But about the preparation method of 4BS, there is still no open literature, and the breakthrough of the traditional

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing tetrabasic lead sulfate from waste lead plaster, the concrete method steps are as follows:

[0022] 1) Collect the waste lead paste produced in the production of lead-acid batteries, send the waste lead paste to the sedimentation tank, add clean water to stir and clean, and then let it settle naturally;

[0023] 2) Take the sediment in step 1), add an appropriate amount of lead powder to the sediment and stir evenly, so that the sediment is a paste-like lead plaster; the amount of lead powder added can make the sediment into a paste;

[0024] 3) Put the pasty lead paste in step 2) into a container, keep it warm for 3 hours with a steam pressure of 0.3mpa, then release the pressure to restore the pasty lead paste to its normal state, keep it for 3 hours, and do this twice continuously to obtain pressurized lead paste;

[0025] 4) drying the pressurized lead paste obtained in step 3) in a drying device at 100°C to obtain a dry lead paste for use; ...

Embodiment 2

[0029] A method for preparing tetrabasic lead sulfate from waste lead plaster, the concrete method steps are as follows:

[0030] 1) Collect the waste lead paste produced in the production of lead-acid batteries, send the waste lead paste to the sedimentation tank, add clean water to stir and clean, and then let it settle naturally;

[0031] 2) Take the precipitate in step 1), add an appropriate amount of lead oxide powder to the precipitate and stir evenly, so that the precipitate is a milky lead paste; the amount of lead powder can make the precipitate into a milky thing;

[0032] 3) Put the pasty lead paste in step 2) into a container, keep it warm for 3.5 hours with 2.5 kg of steam pressure, then release the pressure to restore the pasty lead paste to its normal state, keep it for 5 hours, and do this for 3 consecutive times to obtain pressurized lead paste;

[0033] 4) drying the pressurized lead paste obtained in step 3) in a drying equipment at 105° C. to obtain a dry ...

Embodiment 3

[0037] A method for preparing tetrabasic lead sulfate from waste lead plaster, the concrete method steps are as follows:

[0038] 1) Collect the waste lead paste produced in the production of lead-acid batteries, send the waste lead paste to the sedimentation tank, add clean water to stir and clean, and then let it settle naturally;

[0039] 2) Take the sediment in step 1), add an appropriate amount of lead powder to the sediment and stir evenly, so that the sediment is a pasty (milky) lead paste; the amount of lead powder can make the sediment into a paste;

[0040] 3) Put the pasty lead paste in step 2) into a container, keep it warm for 3.3 hours with a steam pressure of 2.8mpa, then release the pressure to restore the pasty lead paste to its normal state, keep it for 3.5 hours, and do this twice continuously to obtain pressurized lead paste;

[0041] 4) drying the pressurized lead paste obtained in step 3) in a drying device at 102°C to obtain a dry lead paste for use;

...

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Abstract

The invention discloses a method for preparing tetrabasic lead sulfate from waste lead plaster. The method comprises the following steps of: 1) collecting waste lead plaster generated in lead-acid battery production, feeding the waste lead plaster into a settling pond, adding clear water to perform stirring and cleaning, and then performing static settlement naturally; 2) adding a proper amount of lead powder into sediments, and stirring uniformly to ensure that the sediments become pasty lead plaster; 3) putting the pasty lead plaster in the step 2) into a container, keeping the temperature for 3-3.5 hours by using 2.5-3 kg of steam pressure, then releasing the pressure to ensure that the pasty lead plaster returns to a normal state, and keeping the state for 2-5 hours to obtain pressurized lead plaster; 4) drying the pressurized lead plaster obtained in the step 3) in a drying device with the temperature of 100-105 DEG C; 5) putting dried lead plaster in the step 4) into a nylon ball-milling tank to perform ball-milling continuously for 3-4 hours; and 6) pouring ball-milled powder and an agate milling ball into a powder plate, drying the powder at 80 DEG C, sieving the dried powder, then grinding the powder until no relatively large agglomerates exist to obtain tetrabasic lead sulfate.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a method for preparing tetrabasic lead sulfate from waste lead paste. Background technique [0002] The curing of the positive electrode of lead-acid batteries is a key process in battery manufacturing. During the curing process, the chemical and physical structural basis of the active material is established, and the plate obtains mechanical strength, so that the subsequent process operations can be carried out. According to the AOS theory: as the battery cycle progresses, the positive electrode active material repeatedly expands and contracts, and the neck area between the particles becomes smaller, making the contact between the active material particles more and more poor, and the electrical conductivity deteriorates, eventually leading to The active material softens and falls off, the battery capacity is obviously attenuated, and the battery fails. Therefore, i...

Claims

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Application Information

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IPC IPC(8): H01M10/54C01G21/20
CPCY02W30/84H01M10/54C01G21/20
Inventor 杨新明李超雄
Owner TIANNENG BATTERY GRP ANHUI
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