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Reduction method for lead-oxide in storage battery

A lead oxide and storage battery technology, applied in battery recycling, solid waste removal, recycling technology, etc., can solve problems such as lead poisoning of smelting operators, volatile lead ions, energy loss, etc., to reduce pollution and reduce waste of raw coal , high benefit effect

Inactive Publication Date: 2007-10-10
赵恒祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Energy loss caused by high temperature smelting
[0005] (3) During high-temperature smelting (above 1200°C), toxic lead ions are easily volatilized into the atmosphere, causing environmental pollution and bringing the risk of lead poisoning to smelting operators
[0006] At present, there is no report on improving this method and completely overcoming the above shortcomings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Taking 30 tons of lead pot as an example, it is necessary to add 4000 kg of waste lead oxide slag and 1000 kg of sodium hydroxide into 30 tons of lead liquid. The treatment temperature is 480°C. During treatment, 500 kg of waste lead oxide slag and a bag (25 kg) of sodium hydroxide are added each time. Add the shovel into the lead liquid whirlpool with a shovel, react for 1 to 2 minutes, then add the second shovel, and repeat the addition , when the lye on the surface of the lead liquid foams and becomes thicker, stop adding sodium hydroxide, and salvage the residue. After the waste lead oxide slag and sodium hydroxide are completed, the impurity removal of reduced lead can be completed. The lead content in the refined lead after treatment is 99.9626%, reaching the standard that the lead content in the refined lead is greater than 99.96%.

[0026] The composition of the reduced lead before treatment is shown in Table 1, and the composition of the refined lead after tre...

Embodiment 2

[0030] Add 5000 kilograms of waste lead oxide slag and 2000 kilograms of sodium hydroxide into 30 tons of lead liquid. The treatment temperature is 450°C. During the treatment, 550 kg of waste lead oxide slag and 30 kg of sodium hydroxide are added each time, and the iron shovel is added into the lead liquid whirlpool, and the second shovel is added after reacting for 1 to 2 minutes. When the lye on the surface foams and thickens, stop adding sodium hydroxide and salvage the residue. After the residue is salvaged, you can add waste lead oxide slag and sodium hydroxide for the second treatment, and so on until adding waste lead oxide slag After finishing with sodium hydroxide, the impurity removal of reduced lead can be completed. The lead content in refined lead after treatment is 99.97%.

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PUM

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Abstract

This invention discloses a kind of reduction method of lead oxide in storage battery. Waste lead oxide residue and sodium hydroxide are added into lead liquid in 450í½480íµ. The weight percent of lead liquid, waste lead oxide residue and sodium hydroxide are 1.5-3.0 portion of lead, 0.20-0.21 portion of waste lead oxide residue and 0.10-0.11 portion of sodium hydroxide. Lead oxide can be reduced to pure lead and regenerated. As high temperature smelting is not needed, the raw coal wastage is reduced. It also reduces pollution to environment and hazard to human.

Description

technical field [0001] The invention relates to a method for reducing lead oxide produced in the battery manufacturing process. technical background [0002] At present, domestic lead factories all use reverberatory furnaces to smelt lead oxide and reduce lead oxide to lead for reuse. Such a process has the following disadvantages: [0003] (1) It is necessary to heat the lead oxide to above 1200°C, and put in a large amount of iron filings to replace the lead oxide. [0004] (2) High temperature smelting causes energy loss. [0005] (3) During high-temperature smelting (above 1200°C), toxic lead ions are easily volatilized into the atmosphere, causing environmental pollution and bringing the risk of lead poisoning to smelting operators. [0006] At present, there is no report on improving this method and completely overcoming the above-mentioned shortcomings. Contents of the invention [0007] The object of the present invention is to provide a method for reducing lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54B09B3/00
CPCY02E60/12Y02W30/84
Inventor 赵恒祥
Owner 赵恒祥