Method for synthesizing tetrabasic lead sulfate by utilizing positive electrode waste lead plaster and application thereof

A technology of four-basic lead sulfate and waste lead paste, which is applied in the direction of lead sulfate, recycling technology, waste collectors, etc., can solve the problems of reducing the initial capacity of batteries, difficulty in formation, and increasing production costs of battery enterprises, and achieves a solution The effect of solving problems and reducing production costs

Inactive Publication Date: 2014-01-01
TIANNENG GRP JIANGSU SPECIAL POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the most used method is to increase the temperature of the paste or to perform high-temperature curing, but it is difficult to control the amount and particle size of tetrabasic lead sulfate in the lead paste. Once the content of tetrabasic lead sulfate in the lead paste is too high, It is easy to cause difficulty in formation and greatly reduce the initial capacity of the battery
[0005] Of course, purchasing 4BS and adding it to lead paste can solve this problem, but at present some foreign companies have mastered the core technology of 4BS, and there is little domestic production. Therefore, if the purchased 4BS with high purity is added to the production of batteries, it will increase the number of battery companies. production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Collect the positive electrode waste lead paste, and purify the positive electrode waste lead paste, including washing with water, filtering and separating, removing soluble impurities, such as carbon black, lignin, etc., then dehydrating and drying, and passing through a 200-mesh sieve to remove large particles substance. Then the mixture after the treatment is analyzed by complexometric titration, and the content of various components of lead sulfate, lead oxide and free lead is measured, and lead sulfate accounts for 61.5%, lead oxide accounts for 29.1%, and free lead accounts for 7.4%. The total content is 98%;

[0017] (2) According to the requirement that the molar ratio of lead oxide to lead sulfate after the mixed reaction of the waste lead paste after treatment and the added lead powder is 4-5:1, weigh 10g of the positive electrode waste lead paste after treatment, wherein: lead sulfate is 0.020 moles, 0.013 moles of lead oxide, 0.0036 moles of free lead, ...

Embodiment 2

[0020] (1) Collect the positive electrode waste lead paste, and purify the positive electrode waste lead paste, including washing with water, filtering and separating, removing soluble impurities, such as carbon black, lignin, etc., then dehydrating and drying, and passing through a 250-mesh sieve to remove large particles substance. Then the mixture after the treatment is analyzed by complexometric titration, and the various component contents of lead sulfate, lead oxide and free lead are measured, respectively, lead sulfate accounts for 56.1%, lead oxide accounts for 36.4%, and free lead accounts for 5.8%. The total content is 98.3%;

[0021] (2) According to the requirement that the molar ratio of lead oxide to lead sulfate after the mixed reaction of the waste lead paste after treatment and the added lead powder is 4-5:1, weigh 10g of the positive electrode waste lead paste after treatment, wherein: lead sulfate is 0.0185 moles, 0.016 moles of lead oxide, and 0.0028 moles...

Embodiment 3

[0024] (1) Collect the positive electrode waste lead paste, and purify the positive electrode waste lead paste, including washing with water, filtering and separating, removing soluble impurities, such as carbon black, lignin, etc., then dehydrating and drying, and passing through a 300-mesh sieve to remove large particles substance. Then the mixture after the treatment is analyzed by complexometric titration, and the content of various components of lead sulfate, lead oxide and free lead is measured, and lead sulfate accounts for 63.1%, lead oxide accounts for 30.7%, and free lead accounts for 6.0%. The total content is 99.8%;

[0025] (2) According to the requirement that the molar ratio of lead oxide to lead sulfate after the mixed reaction of the waste lead paste after treatment and the added lead powder is 4-5:1, weigh 10g of the positive electrode waste lead paste after treatment, wherein: lead sulfate is 0.021 moles, 0.0138 moles of lead oxide, and 0.0029 moles of free...

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Abstract

The invention discloses a method for synthesizing tetrabasic lead sulfate by utilizing positive electrode waste lead plaster and application thereof. The method comprises the following steps of washing, filtering, separating, dehydrating, drying, sieving and purifying the positive electrode waste lead plaster, and then, carrying out chemical analysis on a treated mixture, thereby obtaining contents of various components of lead sulfate, lead oxide and free lead in the treated mixture according to chemical analysis, adding lead powder to carry out mixing, grinding and sieving, so that the molar ratio of the lead oxide to lead sulfate after hybrid reaction is (4-5):1; and preserving the heat and presintering the sieved mixture in a resistance furnace, and then heating up to sinter, cooling and drying to obtain the tetrabasic lead sulfate. The method can be used for a storage battery manufacturer to prepare according to convenient conditions of the manufacturer, is simple and easy to implement; the prepared tetrabasic lead sulfate can completely satisfy performance requirements while being applied to battery production, so that early capacity loss of a lead storage battery is restrained, various electrical performances of the battery and a cycle life of the storage battery are greatly improved and prolonged, respectively, thereby not only solving a treatment problem of lead-containing waste materials of the storage battery enterprises, but also lowering production cost of enterprises and changing waste into things of value.

Description

technical field [0001] The invention relates to the technical field of waste lead paste recycling, in particular to a method for synthesizing tetrabasic lead sulfate by using positive electrode waste lead paste and its application in batteries. Background technique [0002] Lead-acid batteries are widely used in many fields because of their strong power, abundant raw materials, and low prices. However, a large amount of lead-containing waste is also produced in the production process of lead-acid batteries, which will cause serious environmental pollution if discharged. Most enterprises have not yet formed a complete recycling system. The general treatment method is to dry and pulverize the lead-containing waste and directly add it back to the lead paste for production, or sell it to metal processing enterprises for recycling, which virtually increases the cost of the enterprise. Therefore, it is the purpose of the research and development personnel to explore the eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20H01M10/54
CPCY02E60/12Y02W30/84
Inventor 张慧王斌顾中洋方明学
Owner TIANNENG GRP JIANGSU SPECIAL POWER SUPPLY
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