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Recovery process of lead plaster of waste lead-acid storage battery

A technology of lead-acid battery and lead-acid battery, which is applied in the direction of lead-acid battery, lead-acid battery construction, battery recycling, etc. It can solve the problems of complicated operation, high cost, and large consumption, and achieve simple process, low cost, and wide application foreground effect

Active Publication Date: 2020-11-13
湖南省长城新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention only considered the recycling of positive and negative plates, and did not propose how to recycle positive and negative electrode paste and other spare parts
[0006] The Chinese patent application number 201610691120 discloses a method for recovering lead oxide by a full wet method, which can obtain high-purity lead oxide solids without high-temperature roasting, but a large amount of oxidant H is required in this process. 2 o 2 , high price, high consumption, and poor atom economy
[0007] The Chinese patent with the application number 201910911757.9 discloses a process for recycling waste lead-acid batteries. The collected waste lead-acid batteries are disassembled to obtain waste acid solution, lead paste, plastic and grids, and then the waste acid solution, Lead plaster, plastic and grid are processed, and the processing effect is better and the resource utilization rate is higher through classification processing. However, the classification method is complicated and the operation is complicated. Different parts need to be processed separately, and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 Recycling process of waste lead-acid storage battery lead paste

[0031] The recycling process is as follows:

[0032] S1. Dismantling the collected waste lead-acid batteries to obtain waste acid solution, lead paste, plastics and grids;

[0033] S2. Grinding the lead paste with a ball mill to below 1000 mesh to obtain lead paste powder;

[0034] S3. Add 100g of lead plaster powder into 100mL of 0.5mol / L sulfuric acid solution, add 500g of reducing agent, add dropwise 0.5mol / L of sodium hydroxide solution to obtain a solid, heat to a temperature of 100°C, and react for 2 hours to obtain an oxide containing PbO. thing;

[0035] S4. further pulverizing the oxide containing PbO with a ball mill to below 1000 mesh to obtain oxide powder;

[0036] S5. Put the oxide powder in the muffle furnace, feed water gas, the ventilation rate is 5mL / s, heat to a temperature of 500°C, react for 1h, and perform a reduction reaction to generate elemental lead powder, which ...

Embodiment 2

[0038] Embodiment 2 Recycling process of waste lead-acid storage battery lead paste

[0039] The recycling process is as follows:

[0040] S1. Dismantling the collected waste lead-acid batteries to obtain waste acid solution, lead paste, plastics and grids;

[0041] S2. Grinding the lead paste with a ball mill to below 1000 mesh to obtain lead paste powder;

[0042]S3. Add 100g of lead plaster powder into 500mL of 2mol / L sulfuric acid solution, add 1000g of reducing agent, dropwise add 2mol / L of sodium hydroxide solution to obtain a solid, heat to a temperature of 200°C, and react for 4 hours to obtain an oxide containing PbO;

[0043] S4. further pulverizing the oxide containing PbO with a ball mill to below 1000 mesh to obtain oxide powder;

[0044] S5. Put the oxide powder in the muffle furnace, feed water gas, the ventilation rate is 10mL / s, heat to a temperature of 700°C, react for 5h, and perform a reduction reaction to generate elemental lead powder, which can be used...

Embodiment 3

[0046] Embodiment 3 Recycling process of waste lead-acid storage battery lead paste

[0047] The recycling process is as follows:

[0048] S1. Dismantling the collected waste lead-acid batteries to obtain waste acid solution, lead paste, plastics and grids;

[0049] S2. Grinding the lead paste with a ball mill to below 1000 mesh to obtain lead paste powder;

[0050] S3. Add 100g of lead plaster powder into 300mL of 1.5mol / L sulfuric acid solution, add 700g of reducing agent, add dropwise 1.5mol / L of sodium hydroxide solution to obtain a solid, heat to a temperature of 150°C, and react for 3 hours to obtain an oxide containing PbO. thing;

[0051] S4. further pulverizing the oxide containing PbO with a ball mill to below 1000 mesh to obtain oxide powder;

[0052] S5. Put the oxide powder in the muffle furnace, feed water gas, the ventilation rate is 7mL / s, heat to a temperature of 600°C, react for 3 hours, and perform a reduction reaction to generate elemental lead powder, w...

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PUM

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Abstract

The invention provides a recovery process of lead plaster of a waste lead-acid storage battery, which comprises the steps of pulverizing the lead plaster, carrying out desulfurization reaction to obtain desulfurized lead plaster, adding the desulfurized lead plaster into a muffle furnace, introducing water gas, and carrying out reduction reaction to obtain powder of elemental lead generated by reduction, wherein the elemental lead can be reused in the production of lead-acid batteries. The method is simple in process and low in cost, does not corrode equipment or pollute the environment, can obtain high-purity lead without refining by using sodium hydroxide and sodium nitrate refining agents in a refining pot, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of storage batteries, in particular to a recovery process for lead paste of waste lead-acid storage batteries. Background technique [0002] The battery industry is an important part of the new energy field, and has become a new hot spot in the global economic development. The lead-acid battery industry is closely related to the power, transportation, and information industries, and is inseparable from various fields of the national economy such as national defense, computers, scientific research, and ports. , From the perspective of sales revenue, lead-acid batteries currently account for more than 80% of the total revenue in the entire field of chemical power sources. The domestic lead-acid battery industry has developed rapidly, and large-scale enterprises have also reached a considerable production scale and a high technical level. Coupled with the increasing demand in the international market, my count...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M10/12H01M4/56
CPCH01M4/56H01M10/12H01M10/54Y02E60/10Y02W30/84Y02P70/50
Inventor 罗跃成李桂辉
Owner 湖南省长城新能源科技有限公司
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