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Method for preparing tetrabasic lead sulfate by using acid leaching byproduct in production of lead acid storage battery positive electrode plate

A four-basic lead sulfate and lead-acid battery technology, which is applied in lead sulfate, battery recycling, recycling technology, etc., can solve the excessive corrosion of the positive grid of the lead-acid battery, the early capacity of the negative sulfation, and the softening and falling off of the active material To achieve the effect of slowing down the early capacity fading phenomenon, stabilizing the material composition, and slowing down the early capacity fading

Inactive Publication Date: 2014-12-17
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, lead-acid batteries have serious early capacity loss (PCL) problems such as excessive corrosion of the positive grid, softening and falling off of the active material, and sulfation of the negative electrode, which greatly restrict its development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh 100g of leaching acid by-products drained of surface moisture, obtain the content of lead sulfate, lead oxide, and free lead by complexometric titration, and determine the content of moisture by gravimetric analysis; respectively, lead sulfate content 36.6%, lead oxide content 18.6%, free lead content 9.5%, moisture content 35.0%, and the remaining impurities are the positive electrode formula of lead-acid batteries. Impurities have no effect on the reaction and the content is very small, so they are not considered.

[0024] Obtain the amount of substance of lead oxide and lead sulfate in these 100g by-products by calculation, add these 100g by-products in the reactor, be 3:1 proportioning reactant according to the amount ratio of lead oxide and lead sulfate substance, also need additional Add 61.5g of pure lead oxide to convert it into lead powder for production (degree of oxidation 75%), that is, add 82g of lead powder for production (degree of oxidati...

Embodiment 2

[0030] Accurately weigh 100g of leaching acid by-products drained of surface moisture, and obtain the contents of lead sulfate, lead oxide, free lead and moisture through chemical analysis;

[0031] By calculating the amount of lead oxide and lead sulfate in the by-products, this 100g by-product is added to the reactor, and 118g of lead for production is added in the reactor according to the ratio of lead oxide and lead sulfate to 4:1. powder (degree of oxidation 75%) (the calculation method of the lead powder consumption for production is the same as in Example 1, the same below), while adding 250g deionized water as the medium of the reaction;

[0032] The reaction kettle was installed in a homogeneous reactor, and the reaction was continuously stirred at 90°C for 7 hours;

[0033] The reaction kettle product was transferred to the ball mill and ball milled for 5 hours under the condition of 300r / min;

[0034] The final reactant was dried and pulverized to obtain powdery te...

Embodiment 3

[0037] Accurately weigh 100g of leaching acid by-products drained of surface moisture, and obtain the contents of lead sulfate, lead oxide, free lead and moisture through chemical analysis;

[0038] By calculating the amount of lead oxide and lead sulfate in the by-products, this 100g by-product is added to the reactor, and 154g of lead for production is added in the reactor according to the ratio of lead oxide and lead sulfate to 5:1. powder (oxidation degree 75%), and add 300g deionized water as the reaction medium at the same time;

[0039] The reaction kettle was installed in a homogeneous reactor, and the reaction was continuously stirred at 100°C for 4 hours;

[0040] The reaction kettle product was transferred to the ball mill and ball milled for 6 hours under the condition of 300r / min;

[0041] The final reactant was dried and pulverized to obtain powdery tetrabasic lead sulfate with a purity of 81%.

[0042]

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Abstract

The invention relates to a method for preparing tetrabasic lead sulfate by using an acid leaching byproduct in the production of a lead acid storage battery positive electrode plate. The method comprises the following steps: 1, draining water on the surface of the acid leaching byproduct, respectively determining the content of lead sulfate, lead oxide, simple substance lead and water in the acid leaching byproduct through a chemical analysis technology and a gravimetric analysis technology, and determining the percentage content of lead sulfate and lead oxide; 2, adding the surface water drained acid leaching byproduct into a reaction kettle, supplementing lead oxide or lead powder used for producing the lead acid storage battery according to the determination results obtained in step 1 to make a molar ratio of lead oxide to lead sulfate in the reaction kettle reach 3-6.5:1, and using deionized water as a reaction medium in a reaction system; and 3, preparing the tetrabasic lead sulfate. The above raw material is the lead acid battery byproduct and is applied to the production of the lead acid battery, so waste recycling is realized, the production cost of the lead acid storage battery is reduced, the method is environmentally friendly, and the quality of the battery is improved.

Description

technical field [0001] The invention relates to a utilization method of a by-product of a positive plate of a lead-acid battery, in particular to a method for preparing tetrabasic lead sulfate by using a by-product of leached acid in the manufacture of a positive plate of a lead-acid battery. Background technique [0002] Lead-acid battery has become the most widely used chemical power source in today's society due to its advantages of safety, reliability, simple manufacture, and low cost. However, lead-acid batteries produce a large amount of lead-containing by-products during the production process. At present, most storage battery companies collect by-products and sell them to lead recycling companies for refined lead smelting, but the cost control brought by this method is very low, and the refined lead smelting process will also bring environmental pollution. Therefore, how to deal with these lead-containing by-products is very important for lead-acid battery companies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C01G21/20
CPCY02W30/84C01G21/20
Inventor 李伟伟周明明杨新新赵磊阙奕鹏李斌戴贵平
Owner CHAOWEI POWER CO LTD
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