Method for recycling waste lead-acid storage battery and producing tribasic lead sulfate

A technology for tribasic lead sulfate and waste lead-acid batteries, which is applied in battery recycling, lead sulfate, ammonium sulfate, etc., can solve the problem of high prices of raw materials oxalic acid and ammonium carbonate, difficulty in processing by-product sodium sulfate decahydrate, and production costs. higher question

Active Publication Date: 2012-08-22
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent CN101514395A "Method for Recycling Lead Oxide from Waste Lead-acid Batteries", it is mentioned that the method of reducing lead sludge adopts the oxalic acid reduction method, and the desulfurization adopts the ammonium carbonate method. The disadvantage of this method is that the raw material oxalic acid and ammonium carbonate are expensive, resulting in high cost
The production method of tribasic lead sulfate is to react lead sulfate and caustic soda in water to generate tribasic lead sulfate and sodium sulfate decahydrate. Because the dehydration of sodium sulfate decahydrate consumes energy and the price of anhydrous sodium sulfate (yuan Mingfen) is low , resulting in difficulties in the treatment of the by-product sodium sulfate decahydrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Dismantling of waste batteries

[0042] Pour out the residual acid in the discarded lead-acid battery, cut out the waste battery box cover and break it into particles for reuse; take out the electrodes in the box of the waste battery and separate the negative and positive electrode grids.

[0043] 2. Anode recycling

[0044](1) Take the anode electrode grid and its appendages and put them into HNO with a mass concentration of 10% 3 In the solution, take out the electrode grid after reacting at 40°C for 60 minutes; filter the reaction solution, and the filtrate is Pb(NO 3 ) 2 solution, spare;

[0045] (2) Put the filter residue of step (1) into 50g / L (NH 4 ) 2 SO 3 solution, reacted at 40°C for 60 minutes; the reaction solution was filtered, and the filtrate was (NH 4 ) 2 SO 4 solution, the filter residue is PbO and PbSO 4 ;

[0046] (3) Combine the filter residue of step (2) with the HNO of mass concentration 10% 3 Solution reaction, 40 ° C for 60 minutes...

Embodiment 2

[0061] 1. Dismantling of waste batteries

[0062] Pour out the residual acid in the discarded lead-acid battery, cut out the waste battery box cover and break it into particles for reuse; take out the electrodes in the box of the waste battery and separate the negative and positive electrode grids.

[0063] 2. Anode recycling

[0064] (1) Take the anode electrode grid plate and its appendages and put them into HNO with a mass concentration of 30% 3 In the solution, take out the electrode grid after reacting at 60°C for 45 minutes; filter the reaction solution, and the filtrate is Pb(NO 3 ) 2 solution, spare;

[0065] (2) Put the filter residue of step (1) into 120g / L (NH 4 ) 2 SO 3 solution, reacted at 60°C for 40 minutes; the reaction solution was filtered, and the filtrate was (NH 4 ) 2 SO 4 solution, the filter residue is PbO and PbSO 4 ;

[0066] (3) Combine the filter residue of step (2) with the HNO of mass concentration 30% 3 Solution reaction, react at 60°C...

Embodiment 3

[0081] 1. Dismantling of waste batteries

[0082] Pour out the residual acid in the discarded lead-acid battery, cut out the waste battery box cover and break it into particles for reuse; take out the electrodes in the box of the waste battery and separate the negative and positive electrode grids.

[0083] 2. Anode recycling

[0084] (1) Take the anode electrode grid and its appendages and put them into HNO with a mass concentration of 50% 3 In the solution, take out the electrode grid after reacting at 80°C for 30 minutes; filter the reaction solution, and the filtrate is Pb(NO 3 ) 2 solution, spare;

[0085] (2) Put the filter residue of step (1) into 200g / L (NH 4 ) 2 SO 3 solution, reacted at 90°C for 30 minutes; the reaction solution was filtered, and the filtrate was (NH 4 ) 2 SO 4 solution, the filter residue is PbO and PbSO 4 ;

[0086] (3) Combine the filter residue of step (2) with the HNO of mass concentration 50% 3 Solution reaction, reacted at 80°C for...

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PUM

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Abstract

The invention provides a method for recycling a waste lead-acid storage battery and producing tribasic lead sulfate, which comprises the steps of waste battery dismantling, anode recycling, cathode recycling and product generation. The method has the advantages that a most valuable by-product is produced with a cheapest raw material, the waste lead-acid storage battery is recycled at a utilizing rate of approximately 100%, and the waste lead-acid storage battery is recycled at a maximum ratio.

Description

technical field [0001] The invention relates to a treatment method for waste lead-acid batteries, in particular to a method for recovering and producing tribasic lead sulfate from waste lead-acid batteries. Background technique [0002] With the widespread application of lead-acid batteries, the recycling of waste lead-acid batteries has also become a social concern. Most of the current recycling methods for waste lead-acid batteries are wet recovery of lead. The specific treatment method is: separation of lead slime - reduction - desulfurization - recovery of lead products and by-products. In the patent CN101514395A "Method for Recycling Lead Oxide from Waste Lead-acid Batteries", it is mentioned that the method of reducing lead sludge adopts the oxalic acid reduction method, and the desulfurization adopts the ammonium carbonate method. The disadvantage of this method is that the raw material oxalic acid and ammonium carbonate are expensive, resulting in production high c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20C01C1/24B09B3/00
CPCY02W30/84
Inventor 邹恩义刘宏文李静静林军连志荣张金鹤
Owner DALIAN JIAOTONG UNIVERSITY
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