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Detection method for content of barium sulfate in recovered lead powder

A detection method, the technology of barium sulfate, applied in the field of detection of barium sulfate content in recycled lead powder, can solve the problems of harsh processing conditions, little significance of production guidance, long processing and detection time, etc., and achieve the effect of accurate content method

Inactive 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

This method is true and reliable for the test of barium sulfate, and the test data can truly reflect the content of barium sulfate in lead powder. However, this method needs to process the material at high temperature, and the processing conditions are harsh.
At the same time, it takes a long time to process and detect, generally takes about 24 hours, so this detection method has little significance for sample monitoring in the actual production process and production guidance

Method used

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  • Detection method for content of barium sulfate in recovered lead powder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] Step 1. Accurately weigh 10.245g of recovered lead powder, transfer it into a 250ml beaker, then add 100ml of 1:4 nitric acid and slowly heat to 60-80°C to completely dissolve the recovered lead powder, cool to room temperature after dissolution, and transfer the filtrate to a 500ml volumetric flask Constant volume, while making a blank;

[0025] Step 2, 500ml of the solution and the blank at constant volume were ultrasonically oscillated for 5 minutes. After shaking, the content of barium sulfate was detected by ICP. Barium sulfate content is 1.356μg / ml;

[0026] Step 3, after the curve equation corresponds to the actual calculation of the actual value of barium sulfate Y=2.137*1.356-0.0949=2.802872μg / ml

[0027] Step 4, the actual content of barium sulfate in the recovered lead powder=2.802872μg / ml*500ml*10-6 / 10.245g=0.013679%. That is, the content of 137ppm barium sulfate 137ppm in the recovered lead powder is higher than 100ppm. This lead powder cannot be directl...

Embodiment 2

[0030] Step 1. Accurately weigh 12.230g of recovered lead powder, transfer it to a 250ml beaker, then add 100ml of 1:4 nitric acid and slowly heat to 60-80°C to completely dissolve the recovered lead powder, cool to room temperature after dissolution, and transfer the filtrate to a 500ml volumetric flask Constant volume, while making a blank;

[0031] Step 2, 500ml of the solution and the blank at constant volume were ultrasonically oscillated for 5 minutes. After shaking, the content of barium sulfate was detected by ICP. Barium sulfate content is 1.135μg / ml;

[0032] Step 3, after the curve equation corresponds to the actual calculation of the actual value of barium sulfate Y=2.137*1.135-0.0949=2.3306μg / ml

[0033] Step 4, the actual content of barium sulfate in the recovered lead powder=2.3306 μg / ml*500ml*10-6 / 12.230g=0.00953%. That is, the content of 95ppm barium sulfate and 95ppm in the recovered lead powder is lower than 100ppm, and the lead powder can be directly use...

Embodiment 3

[0036] Step 1. Accurately weigh 25.520g of recovered lead powder, transfer it to a 250ml beaker, then add 100ml of 1:4 nitric acid and slowly heat to 60-80°C to completely dissolve the recovered lead powder, cool to room temperature after dissolution, and transfer the filtrate to a 500ml volumetric flask Constant volume, while making a blank;

[0037] Step 2, 500ml of the solution and the blank at constant volume were ultrasonically oscillated for 5 minutes. After shaking, the content of barium sulfate was detected by ICP. Barium sulfate content is 2.158μg / ml;

[0038] Step 3, after the curve equation corresponds to the actual calculation of the actual value of barium sulfate Y=2.137*2.158-0.0949=4.5167μg / ml

[0039] Step 4, the actual content of barium sulfate in the recovered lead powder=4.5167μg / ml*500ml*10-6 / 25.52g=0.00885%. That is, the content of 88ppm barium sulfate 88ppm in the recovered lead powder is lower than 100ppm, and the lead powder can be directly used for ...

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Abstract

The invention relates to a detection method for the content of barium sulfate in recovered lead powder. The detection method comprises the following steps: weighing a certain amount of recovered lead powder, transferring the recovered lead powder to a beaker, adding nitric acid, carrying out slow heating until the recovered lead powder is totally dissolved, carrying out cooling to normal temperature after complete dissolving, transferring a filtrate to a volumetric flask for volume fixation and preparing a blank solution at the same time; subjecting the filtrate with a fixed volume and the blank solution to ultrasonic concussion and detecting the content of barium sulfate with ICP detection equipment after completion of concussion; preparing standard barium sulfate solutions; detecting the measured values of barium sulfate ions in every standard barium sulfate solution by using the ICP detection equipment; drafting a standard curve of the actual value and measured values of barium sulfate and acquiring the equation of the standard curve; substituting the barium sulfate content detected by the ICP detection equipment into the equation of the standard curve and calculating the actual value of diluted barium sulfate; and calculating the content of barium sulfate in the recovered lead powder. The method is accurate, efficient and simple in detection of the content of barium sulfate in the recovered lead powder.

Description

technical field [0001] The invention relates to a method for detecting barium sulfate content in recovered lead powder. Background technique [0002] In lead-acid batteries, barium sulfate is used as a negative electrode expansion agent to provide crystal nuclei for PbSO4 deposition when the battery is discharged. The addition of inert barium sulfate provides a large surface area for PbSO4 to deposit, preventing the formation of an impermeable passivation layer and thus preventing plate passivation. BaSO4 has the ability to improve the high rate performance of the battery in a low temperature environment, so a certain amount of barium sulfate must be added to the negative electrode paste, and if there is a large amount of barium sulfate in the positive electrode paste, it will speed up the active material on the positive plate and reduce the use of the battery. Lifespan, a large number of experimental studies have proved that when the lead paste barium sulfate in the positi...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28G01N1/38G01N1/44
CPCG01N21/73G01N1/28G01N1/38G01N1/44
Inventor 代少振王江林项晨吴鑫马永泉
Owner CHAOWEI POWER CO LTD