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Collection and Utilization Method of Permeate of Lead Carbon Pole Plate Coating Strip

A technology of permeate and electrode plate, applied in the field of battery electrode plate smear process, can solve the problems such as the influence of electrode plate quality, the crystallization and hardening of lead paste, the inability to effectively guarantee the amount and composition state of the filter press, and achieve no impact on quality and avoidance of Cost waste, avoid the effect of recycling

Active Publication Date: 2022-04-12
ZHEJIANG TIANNENG BATTERY JIANGSU +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during this process, the amount and composition of the filter press can not be effectively guaranteed, especially with the volatilization of water, the filter press that has been placed for a long time will cause the lead paste to crystallize and harden, which will inevitably have a great impact on the quality of the subsequent plate production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0014] This embodiment provides a method for collecting and utilizing the permeate of the lead carbon electrode plate coating strip, including the following steps:

[0015] Lead slime collection: Use an acid-resistant plastic collection box to collect the permeate on the lead-carbon plate coating belt. The volume of the permeate is required to reach 2 / 3 of the collection box; then let the permeate stand for 8 hours without drying up, and then filter Remove excess acid water to get wet lead mud;

[0016] Deacidification treatment: Add 40% of its weight lead powder whose main component is lead oxide to the wet lead slime, stir evenly for 10 minutes, then add appropriate amount of pure water until the wet specific gravity of the mixture is 3, and the lead slime can be recovered.

[0017] The content of each component in the above-mentioned recycled lead slime is: basic lead sulfate 37%, metallic lead 8%, lead oxide 27%, and the rest are other compounds and auxiliary materials. T...

Embodiment approach 2

[0020] This embodiment provides a method for collecting and utilizing the permeate of the lead carbon electrode plate coating strip, including the following steps:

[0021] Lead slime collection: Use an acid-resistant plastic collection box to collect the permeate on the lead-carbon plate coating belt. The volume of the permeate is required to reach 2 / 3 of the collection box; then let the permeate stand for 8 hours without drying up, and then filter Remove excess acid water to get wet lead mud;

[0022] Deacidification treatment: Add 35% of the weight of lead powder whose main component is lead oxide to the wet lead slime, stir evenly for 10 minutes, then add appropriate amount of pure water until the wet specific gravity of the mixture is 2.8, and the lead slime can be recovered.

[0023] The content of each component in the above-mentioned recycled lead slime is: basic lead sulfate 31%, metallic lead 7%, lead oxide 24%, and the rest are other compounds and auxiliary material...

Embodiment approach 3

[0028] This embodiment provides a method for collecting and utilizing the permeate of the lead carbon electrode plate coating strip, including the following steps:

[0029] Lead slime collection: Use an acid-resistant plastic collection box to collect the permeate on the lead-carbon plate coating belt. The volume of the permeate is required to reach 2 / 3 of the collection box; then let the permeate stand for 8 hours without drying up, and then filter Remove excess acid water to get wet lead mud;

[0030] Deacidification treatment: Add 45% of the weight of lead powder whose main component is lead oxide to the wet lead slime, stir evenly for 10 minutes, then add appropriate amount of pure water until the wet specific gravity of the mixture is 33.3, and the lead slime can be recovered.

[0031] The content of each component in the above-mentioned recycled lead slime is: basic lead sulfate 43%, metallic lead 9%, lead oxide 32%, and the rest are other compounds and auxiliary materia...

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PUM

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Abstract

The invention relates to the field of chemical industry, and discloses a method for collecting and utilizing the permeate of a lead-carbon plate-coated belt, comprising the following steps: collecting lead slime: collecting the permeate on the lead-carbon plate-coated belt, and collecting the permeate After standing and settling, filter out excess acid water to obtain wet lead mud; deacidification treatment: add lead powder accounting for 10% to 50% of its weight to the wet lead mud, stir evenly, add appropriate amount of pure water to wet specific gravity If it is 2.5 to 3.5, lead slime can be recovered. The invention can quickly and effectively reduce the specific gravity of acid in the lead slime, and when the obtained recovered lead slime is mixed with new lead slime, it has no influence on the components of the lead paste, that is, it has no influence on the capacity and life performance of subsequent batteries.

Description

technical field [0001] The invention relates to the field of battery plate smearing process, in particular to a method for collecting and utilizing permeate of lead-carbon plate-coated strips. Background technique [0002] In the battery plate smearing process, the lead paste is extruded on the grid by the machine and output through the coating belt. The coating belt is a nylon braid, and the lead paste is composed of a mixture of lead powder, sulfuric acid, pure water, short fibers, and additives. During the extrusion process, the lead paste will seep down through the coating belt and be collected through the pipes. 20-30% of the permeate is lead sludge, 50-70% of the lead sludge is basic lead sulfate, and the rest is acid water, other compounds and auxiliary materials. At present, the collected lead slime is sold as waste products, resulting in a waste of cost. It is also possible to return the lead mud to the paste mixing machine for use after directly filtering out ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/20
CPCH01M10/54H01M4/20Y02E60/10Y02W30/84
Inventor 李军孙磊张继胜胡国柱
Owner ZHEJIANG TIANNENG BATTERY JIANGSU