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Method for preparing lead oxide by using lead-acid storage battery positive electrode acid leaching waste lead mud

A lead-acid battery and lead slime technology, applied in the direction of lead red, lead oxide, etc., can solve the problems of red lead process complexity, environmental pollution, high energy consumption, etc., and achieve uniform and stable products, easy access to raw materials, and good material stability 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

[0030] Accurately weigh a certain amount of positive electrode waste lead sludge, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead sludge by chemical analysis method:

[0031] By calculating the amount of lead sulfate obtained, these waste lead muds 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.

[0032] Pass the ground powder through a 60-mesh sieve,

[0033] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 400-500°C.

[0034] Put the crucible into a high-temperature furnace and bake it for 2-3 hours.

[0035] The finally obtained reaction product has a purity of 60.2%.

Embodiment 2

[0037] Accurately weigh a certain amount of positive electrode leached acid waste lead sludge, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead sludge by chemical analysis method:

[0038] By calculating the amount of lead sulfate obtained, these waste lead sludges 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 sludge is reacted. After filtering and washing, the obtained filter cake is then dried and ground.

[0039] Pass the ground powder through an 80-mesh sieve,

[0040] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 300-400°C.

[0041] Put the crucible into a high-temperature furnace and bake it for 7-8 hours.

[0042] The finally obtained reaction product has a purity of 75.4%.

Embodiment 3

[0044] Accurately weigh a certain amount of positive electrode leached acid waste lead sludge, and determine the percentage content of lead sulfate, lead oxide, elemental lead and moisture in the lead sludge by chemical analysis method:

[0045] By calculating the amount of lead sulfate obtained, these waste lead sludges 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 sludge is reacted. After filtering and washing, the obtained filter cake is then dried and ground.

[0046] Pass the ground powder through a 300 mesh sieve,

[0047] Put the powder into the crucible, put it into a high-temperature furnace and bake it at a temperature of 300-400°C.

[0048] Put the crucible into a high-temperature furnace and bake it for 3-4 hours.

[0049] 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 acid leaching waste lead mud. The method comprises: 1) drying waste lead mud, and detecting the mass content of lead sulfate in the waste lead mud; 2) weighing a certain amount of waste lead mud, adding a prepared desulfurization solution, and reacting with the lead sulfate in the waste lead mud so as to finally remove the lead sulfate in the waste lead mud; 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 acid leaching waste lead mud generated during the lead-acid storage battery positive electrode plate production process is adopted as the raw material, such that the raw materials are easy to obtain; and the components of the positive electrode acid leaching waste lead mud of most of the lead-acid storage battery manufacturing companies are substantially the same, such that 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] Now in the production of lead-acid batteries, the plates will go through the stages of coating, soaking acid and curing. During the acid leaching phase of the positive electrode, a small part of the paste on the surface of the plate will fall into the acid leaching pool. The positive electrode lead sludge cannot be recycled and will be 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 content of each component is basically stable within a range, so the stability and parallelism of the lead paste are used for...

Claims

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Application Information

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IPC IPC(8): C01G21/10C01G21/02
Inventor 项晨王江林蔡晓祥代少振吴鑫宋爽周丽
Owner CHAOWEI POWER CO LTD
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