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Method for recycling lead oxide used for cathode of lead-acid cell directly from waste lead plaster

A lead-acid battery, waste lead paste technology, applied in the directions of lead monoxide, lead oxide, recycling technology, etc., can solve the problems of long process of recycling lead oxide, unavailability of barium sulfate additives, etc., and achieve the effect of avoiding heat energy consumption

Active Publication Date: 2015-04-15
CHAOWEI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of this invention is to provide a new method for directly reclaiming lead oxide containing barium sulfate from waste lead paste to be used as negative electrode lead oxide of lead-acid battery. Disadvantages of long process and barium sulfate additive can not be used

Method used

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Embodiment approach

[0057] According to a preferred embodiment of the present invention, the atom economic reaction accelerator is a mixture of lead powder and β-lead dioxide, and the weight ratio of lead powder and β-lead dioxide is 1:0.05-2. The use of the preferred atom-economical reaction accelerator can ensure rapid reaction and meanwhile have lower economic cost.

[0058] As long as the consumption of the described atom-economic reaction accelerator can make the above-mentioned conversion process fully carry out, the consumption of the preferred described atom-economic reaction accelerator is 0.05-30% by weight of the obtained filter residue weight of step (1), more preferably 0.5- 25% by weight, more preferably 1-20% by weight.

[0059] The inventors of the present invention have found that when the desulfurizing agent is NaOH and / or KOH solution, by adding NaOH and / or KOH to the filtrate obtained in step (1), to increase the concentration of NaOH and / or KOH in the filtrate, Further, when...

Embodiment 1

[0064] This embodiment is used to illustrate the method for directly reclaiming lead oxide in the waste lead paste of the lead-acid battery for electric vehicles of the present invention.

[0065] 12V, 12Ah waste electric vehicle batteries were broken, and 2 kg of waste lead paste was weighed as a sample of this embodiment. After analysis, the weight percentages of its main components were as follows: 21% PbO, 9% Pb, 37% PbSO 4 , 31%PbO 2 and 0.5% BaSO 4 , the balance is the sulfuric acid aqueous solution of 12% by weight percent concentration), and the various lead compounds of these waste lead plasters are converted into PbO and counted as 7.79mol.

[0066] The recovery process of lead oxide is as follows:

[0067] (1) above-mentioned 2 kilograms of waste lead plaster and 2 liters of weight percent concentration are mixed at 35 ℃ of NaOH solution of 8.9%, and carry out ball milling (relative to the waste lead plaster of 1000 grams, the quality of grinding ball is 300 grams...

Embodiment 2

[0073] This example is used to illustrate that the present invention utilizes the NaOH solution obtained in step (4) of Example 1 to be used again in the desulfurization process of step (1).

[0074] Continue to take by weighing 2 kilograms of waste lead plaster identical to embodiment 1, and its recycling PbO process is as follows:

[0075] (1) The waste lead plaster of lead-acid battery and the whole NaOH solution that embodiment 1 step (4) obtains (through titration analysis, the weight percent concentration of its NaOH solution is 9.5%) carries out ball milling mixing (relative to 1000 grams of waste Lead plaster, the quality of grinding ball is 130 grams, zirconia grinding ball), ball milling process adds 10.4 grams of 300 mesh lead powder and 6.0 grams of 300 mesh β-PbO 2 (chemically pure) as an atom economic reaction accelerator, filter after ball milling for 30 minutes, obtain filtrate and filter residue;

[0076] (2) program the temperature of the above-mentioned fil...

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Abstract

The present invention relates to a method for recycling lead oxide used for a cathode of a lead-acid cell directly from waste lead plaster. The method comprises the steps that in presence of desulfurization conditions, the waste lead plaster contact with a baric desulfurizing agent and solid-liquid separation is preformed on the mixture after the contact, so as to obtain a filtered liquid and filtered residue; and conversion reaction is performed on the filtered residue under the temperature of 350-750 DEG C, enabling lead-containing ingredients of the filtered residue to be converted to lead oxide. According to the method, a barium sulfate additive can be supplemented in a quantitative manner in a desulfurizing process, thereby realizing recycling a lead oxide raw material applicable to the cathode of the lead-acid cell directly from the waste lead plaster, greatly reducing recycling cost and energy consumption, and raising the rate of multipurpose utilization of the waste lead plaster.

Description

technical field [0001] The invention relates to a method for directly recovering lead oxide used for the negative electrode of lead-acid batteries from waste lead paste. Background technique [0002] Since the invention of lead-acid batteries by French engineer Plante in 1859, lead-acid batteries have been widely used in the fields of automobiles, electric vehicles and energy storage as a cheap and reliable secondary battery. According to the latest statistics from the Taiwan Industrial Technology Research Institute, although there has been competition between lithium-ion batteries and nickel-metal hydride batteries in recent years, lead-acid battery consumption has always occupied the main share of secondary batteries. In 2012, the global output value of secondary batteries was 60.285 billion US dollars, of which the output value of lead-acid batteries was 39.294 billion US dollars, and its proportion in secondary batteries reached 65.2%. According to statistics from the G...

Claims

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Application Information

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IPC IPC(8): C01G21/06H01M10/54
CPCY02W30/84
Inventor 潘军青马永泉孙艳芝蔡晓祥钮因健刘孝伟宋爽陈体衔曹国庆周明明杨新新周龙瑞杨云飞
Owner CHAOWEI POWER CO LTD
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