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A kind of resource utilization method of sulfuric acid solution containing barium sulfate

A technology of sulfuric acid solution and barium sulfate, applied in recycling technology, regeneration of useful parts, recycling of waste collectors, etc., can solve the problems of reducing oxygen evolution overpotential, affecting the capacity and life of lead-acid batteries, etc.

Active Publication Date: 2019-04-23
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (2) Barium sulfate is a harmful impurity of the positive active material: the positive active material of the lead storage battery is lead dioxide, if the lead dioxide containing barium sulfate is directly used as the positive electrode material of the lead storage battery, the presence of barium sulfate will cause Reduce the oxygen evolution overpotential on the lead dioxide electrode, and the presence of barium sulfate impurities will affect the capacity and life of the lead-acid battery

Method used

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  • A kind of resource utilization method of sulfuric acid solution containing barium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 1 Shown, a kind of resource utilization method of sulfuric acid solution containing barium sulfate, the steps are as follows:

[0048] (1) Mixing and dilution: In the stirred tank type mixing and dilution equipment, the sulfuric acid solution containing barium sulfate is mixed with water, and the amount of diluent water is to dilute the sulfuric acid in the sulfuric acid solution containing barium sulfate to a concentration of 6.0mol / L, the barium sulfate in the solution is separated out, and the mixed and diluted material enters the next step;

[0049] (2) Solid-liquid separation: In the plate-and-frame solid-liquid separation equipment, the material obtained in the previous step is subjected to solid-liquid separation, and the solid-phase material barium sulfate is directly used as an additive for preparing the negative electrode active material of a lead storage battery, and the obtained liquid-phase material Go to the next step;

[0050] (3) Secondary...

Embodiment 2

[0054] like figure 1 Shown, a kind of resource utilization method of sulfuric acid solution containing barium sulfate, the steps are as follows:

[0055] (1) Mixing and dilution: In the stirring tank type mixing and dilution equipment, the sulfuric acid solution containing barium sulfate is mixed with water, and the amount of diluent water added is to dilute the concentration of sulfuric acid in the sulfuric acid solution containing barium sulfate to 12.0mol / L , the barium sulfate in the solution is separated out, and the mixed and diluted material enters the next step;

[0056] (2) Solid-liquid separation: In the vacuum filtration solid-liquid separation equipment, the material obtained in the previous step is subjected to solid-liquid separation, and the solid-phase material barium sulfate is directly used as an additive for preparing the negative electrode active material of the lead storage battery, and the liquid-phase material enters the lower step;

[0057] (3) Second...

Embodiment 3

[0061] like figure 1 Shown, a kind of resource utilization method of sulfuric acid solution containing barium sulfate, the steps are as follows:

[0062] (1) Mixing and dilution: In the static mixer dilution equipment, the sulfuric acid solution containing barium sulfate is mixed with water, and the amount of diluent water added is to dilute the sulfuric acid in the sulfuric acid solution containing barium sulfate to a concentration of 10.0mol / L , the barium sulfate in the solution is separated out, and the mixed and diluted material enters the next step;

[0063] (2) Solid-liquid separation: In the centrifuge type solid-liquid separation equipment, the material obtained in the previous step is subjected to solid-liquid separation, and the solid-phase material barium sulfate is directly used as an additive for preparing the negative electrode active material of the lead storage battery, and the liquid-phase material enters the lower step;

[0064] (3) secondary dilution: in ...

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Abstract

The invention relates to a method for resource utilization of barium sulfate-containing sulfuric acid solution. The method is to separate barium sulfate from sulfuric acid solution by adding water dilution-cooling crystallization-solid-liquid separation coupling for the barium sulfate-containing sulfuric acid solution to obtain The liquid-phase product sulfuric acid is used as the electrolyte of the lead storage battery, and the solid-phase product barium sulfate is directly used as an additive for preparing the negative electrode active material of the lead storage battery, so as to realize the comprehensive utilization of resources of barium sulfate and sulfuric acid in the sulfuric acid solution containing barium sulfate. The invention has few operating units, high material utilization rate, safe and reliable process, and is an environment-friendly green technology.

Description

technical field [0001] The invention relates to a resource utilization method of sulfuric acid solution containing barium sulfate, and belongs to the technical field of comprehensive utilization of three wastes and separation and purification of inorganic compounds. Background technique [0002] 1. Waste lead storage battery and lead paste [0003] After the lead-acid battery has been charged and discharged for many times, the capacity drops to a very low level or the grid is corroded seriously, the lead-acid battery is difficult to repair, and the charging and discharging work cannot be performed normally, resulting in waste lead-acid battery. [0004] Lead paste (mainly containing PbO, PbSO 4 , PbO 2 ), lead paste is the main lead-containing compound in waste lead-acid batteries. Realizing the comprehensive utilization of resources of lead paste has significant economic benefits, environmental benefits and social value. [0005] 2. Source of lead dioxide material conta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/52H01M10/54
CPCY02W30/84
Inventor 许文林程世骑王雅琼聂文朱少午
Owner YANGZHOU UNIV
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