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Method for preparing lead oxide by using lead-acid storage battery positive electrode plate coating waste lead paste

A technology of lead-acid battery and waste lead paste, which is applied in the direction of lead red and lead oxide, etc., can solve the problems of environmental pollution, high energy consumption, complicated process of red lead, etc., and achieve the production cost reduction, good material stability and high purity Effect

Inactive Publication Date: 2015-10-07
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the process of directly preparing red lead from lead ingots is complicated. After heating and melting the No. 1 or No. 2 lead that complies with the international GB 469-64, it is made into 30mm×30mm lead pellets, which are ball-milled at 170-210°C. After low-temperature roasting, pulverize to about 0.5-1.5 μm, and then perform high-temperature roasting, oxidation and pulverization at 480-500°C to obtain trilead tetraoxide
This method produces high energy consumption and causes great pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Accurately weigh a certain amount of positive electrode waste lead paste, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead paste by chemical analysis method:

[0032] By calculating the amount of lead sulfate obtained, these waste lead plasters are added to the ball mill tank, and a certain amount of desulfurization liquid is added according to the amount of lead sulfate to ensure that the lead sulfate in the lead plaster is reacted. After filtering and washing, the obtained filter cake is then dried and ground.

[0033] Pass the ground powder through a 60-mesh sieve,

[0034] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 300-500°C.

[0035] Put the crucible into a high-temperature furnace and bake it for 4-6 hours.

[0036] The finally obtained reaction product has a purity of 67.2%.

Embodiment 2

[0038] Accurately weigh a certain amount of positive electrode waste lead paste, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead paste by chemical analysis method:

[0039] By calculating the amount of lead sulfate obtained, these waste lead plasters are added to the ball mill tank, and a certain amount of desulfurization liquid is added according to the amount of lead sulfate to ensure that the lead sulfate in the lead plaster is reacted. After filtering and washing, the obtained filter cake is then dried and ground.

[0040] Pass the ground powder through a 120 mesh sieve,

[0041] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 300-500°C.

[0042] Put the crucible into a high-temperature furnace and bake it for 7-8 hours.

[0043] The finally obtained reaction product has a purity of 87.4%.

Embodiment 3

[0045] Accurately weigh a certain amount of positive electrode waste lead paste, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead paste by chemical analysis method:

[0046] By calculating the amount of lead sulfate obtained, these waste lead plasters are added to the ball mill tank, and a certain amount of desulfurization liquid is added according to the amount of lead sulfate to ensure that the lead sulfate in the lead plaster is reacted. After filtering and washing, the obtained filter cake is then dried and ground.

[0047] Pass the ground powder through a 180 mesh sieve,

[0048] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 400-500°C.

[0049] Put the crucible into a high-temperature furnace and bake it for 3-4 hours.

[0050] The finally obtained reaction product has a purity of 79.5%.

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Abstract

The present invention discloses a method for preparing lead oxide by using lead-acid storage battery positive electrode plate coating waste lead paste. The method comprises: 1) drying waste lead paste, and detecting the mass content of lead sulfate in the waste lead paste; 2) weighing a certain amount of waste lead paste, adding a prepared desulfurization solution, and reacting with the lead sulfate in the waste lead paste so as to finally remove the lead sulfate in the waste lead paste; 3) carrying out solid-liquid separation on the reaction product obtained in the step 2), and washing the obtained filter cake with deionized water until no desulfurization solution exists; 4) drying the filter cake prepared in the step 3), and crushing the dried filter cake to prepare powder; and 5) calcining the powder prepared in the step 4) in a high temperature furnace to obtain the lead oxide. According to the present invention, the positive electrode additive lead oxide capable of being recycled by the lead-acid storage battery is prepared through the simple and easy-performing method, the raw materials are easy to obtain, the components of the positive electrode waste lead paste of most of the lead-acid storage battery manufacturing companies are substantially the same, the substance stability is good, and the method is suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the production technology of lead-acid batteries. Background technique [0002] In the production of lead-acid batteries, the lead powder is mixed with the paste to become the lead paste produced by the battery. During the process of coating the lead paste, some waste lead paste is produced, and some plates do not meet the production requirements. These plates will be processed Scrap, will further increase the amount of this kind of waste lead plaster. The waste lead paste can no longer be mixed with paste and plate-coated, scrapped, collected uniformly, and sold to lead recycling companies. However, in the production process of lead-acid batteries, the process is strictly controlled, which also contributes to the uniformity and stability of the waste lead paste produced. The waste lead plaster contains lead oxide, lead sulfate, elemental lead and moisture, and also contains a small amount of lead-acid battery formula. The c...

Claims

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Application Information

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IPC IPC(8): C01G21/10
Inventor 王江林项晨蔡晓祥代少振吴鑫宋爽
Owner CHAOWEI POWER CO LTD
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