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Method for preparing 4BS through waste lead-acid battery

A technology for waste lead-acid batteries and waste lead paste, which is applied in battery electrodes, battery recycling, recycling technology and other directions, can solve the problems of low lead recovery rate, high energy consumption, and the inability to handle sodium sulfate, a by-product of enterprise recovery costs, to achieve The effect of improving utilization and high purity

Active Publication Date: 2017-04-26
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most recycling enterprises adopt two methods of preparing refined lead by fire recovery and wet recovery to prepare lead oxide. The technology of recovery of refined lead by fire method is relatively mature, but the energy consumption in the recovery process is high, the environmental protection treatment is difficult, and the lead recovery rate is low. , the wet recycling process must go through the desulfurization process, which consumes a lot of lye and increases the recycling cost of the enterprise. At the same time, a large amount of by-product sodium sulfate is produced after desulfurization, which cannot be processed. At the same time, because the recycling process only converts the lead-containing waste in the waste lead plaster It is difficult to guarantee the product profit of recycling companies for low-value lead oxide products

Method used

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  • Method for preparing 4BS through waste lead-acid battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put the waste lead plaster and water into the reaction kettle with a stirring device at a weight ratio of 1:4 and stir for 30 minutes at room temperature. After the stirring is completed, let it stand for 30 minutes and then separate into layers. Remove the upper layer, which is light impurities such as plastics. , the lower material is centrifugally filtered, the filter cake is recycled in the next step, and the filtrate is recycled.

[0034] (2) Detect the content of lead dioxide and lead components in the filter cake after impurity removal to convert the molar ratio of lead dioxide to lead. The substance with a high molar number is lead dioxide. Amino acid) material mass ratio 1:1.05 is fed into the filter cake, the concentration of the complexing agent is 3mol / l, the temperature is raised to 120°C and the reaction is stirred for 3 hours, then the temperature is lowered to 70°C and hydrogen peroxide with a mass solubility of 8% is added dropwise Until the solutio...

Embodiment 2

[0044] (1) Put waste lead plaster and pure water into a reaction kettle with a stirring device at a weight ratio of 1:5 and stir for 25 minutes at room temperature. After stirring, let it stand for 25 minutes and then separate into layers. Impurities, the lower material is centrifugally filtered, the filter cake is recycled in the next step, and the filtrate is recycled.

[0045](2) Detect the content of lead dioxide and lead components in the filter cake after impurity removal to convert the molar ratio of lead dioxide to lead. The substance with a high molar number is lead. According to the amount of lead and complexing agent (triethylamine) Feed in the filter cake at a ratio of 1:1, where the concentration of the complexing agent is 2mol / l, heat up to 90°C and stir for 3 hours, then cool down to 60°C and add hydrogen peroxide with a mass solubility of 3% until the solution turns milky white , stop dripping and reaction;

[0046] (3) Filter the milky white turbid liquid in ...

Embodiment 3

[0055] (1) Put waste lead plaster and pure water into a reaction kettle with a stirring device at a weight ratio of 1:4.5 and stir for 15 minutes at room temperature. After stirring, let it stand for 15 minutes and then separate into layers, and remove the upper layer. The upper layer is made of light weight such as plastic. Impurities, the lower material is centrifugally filtered, the filter cake is recycled in the next step, and the filtrate is recycled.

[0056] (2) Detect the content of lead dioxide and lead components in the filter cake after impurity removal to convert the molar ratio of lead dioxide to lead. The substance with a high molar number is lead dioxide. According to lead dioxide and complexing agent (2— Methylimidazole) material mass ratio 1:1.5 was fed into the filter cake, the concentration of the complexing agent was 2.5mol / l, the temperature was raised to 100°C and stirred for 3 hours, then the temperature was lowered to 65°C and the mass solubility was 5% ...

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Abstract

The invention relates to the field of recycling and reusing, and provides a method for preparing 4BS through a waste lead-acid battery. By adoption of the method, recycling and reusing of lead paste in waste lead-acid batteries can be achieved currently. The method for preparing the 4BS through the waste lead-acid battery comprises the steps of removal of impurities, complexing dissolution of lead and lead dioxide, the purification reaction of lead sulfate, purification of the lead and the lead sulfate in the lead paste, dissolution of lead sulfate and the like. The purity of the 4BS prepared through the method is high, and the yield is high; and the method is environmentally friendly, and industrial production can be achieved easily.

Description

technical field [0001] The invention relates to the field of recycling and reuse, in particular to a method for preparing 4BS by utilizing waste lead-acid storage battery lead paste. Background technique [0002] The main raw material for lead production is galena with a lead content of more than 50%. With the continuous reduction of mineral resources, the comprehensive recycling and resource utilization of low-grade polymetallic ores and lead-containing wastes have received extensive attention. It has become an indispensable and important part of the sustainable development strategy of the lead industry. At present, the output of secondary lead in western developed countries accounts for about 65% of the total lead output, the United States is as high as 76.5%, the developing countries are lower, less than 30%, and our country is 17.5%. The production energy consumption of recovering lead from waste acid storage batteries is about 1 / 3 lower than that of primary lead produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20H01M10/54H01M4/62
CPCC01G21/20H01M4/62H01M10/54Y02E60/10Y02W30/84
Inventor 代少振王江林项晨吴鑫
Owner CHAOWEI POWER CO LTD
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