A method for recycling lead of abandoned lead acid accumulator

A technology for waste lead-acid batteries and waste batteries, applied in battery recycling, recycling by waste collectors, recycling technology, etc., can solve problems such as costly auxiliary plates, discharge of waste acid waste water, complex production systems, etc., to reduce recycling Cost, improve production efficiency, simple production system

Inactive Publication Date: 2008-05-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the above prior art, the pyroprocessing process can produce lead smoke and SO 2 , CO 2 , high energy consumption, serious environmental pollution, and will be gradually eliminated; while the wet method and the combination of pyro-wet method have waste acid and wastewater discharge, high energy consumption, complex production system, and need expensive auxiliary plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Get one of the common open-type 6-QA-80 lead-acid accumulators of automobile starting type, pour out acid solution, disintegrate, sort out lead material, obtain 2~8mm granular lead material mixture (grid) after crushing , lead paste) 12.4Kg dry material, put into three polypropylene cloth bags (diameter D=70mm, length H=380mm), and insert a lead strip with a diameter of 15mm and a length of 500mm in the center of the bag as a confluence conduction Place the prepared three bag-type electrodes in the electrolytic cell, connect two bag-type electrodes to the positive pole of the power supply in parallel, and connect one bag-type electrode to the negative pole of the power supply. The distance between the positive and negative poles is 50mm. The sulfuric acid solution (density 1.28~1.30g / cm3) poured out by the battery is added with alkaline water (NaOH addition is 7%) to make PH=8, and it is prepared as an electrolyte solution. The cell voltage between the ele...

Embodiment 2

[0018] Embodiment 2: Get 5 of the common open-type 6-QA-45 lead accumulators of automobile starting type, pour out acid solution, disintegrate battery, sort out lead material, obtain 2~8mm granular lead material mixture (grid) after crushing and lead paste mixture) 44kg, evenly packed into 9 polypropylene cloth bags, a lead alloy conductive strip with a diameter of 16mm and a length of 500mm was inserted in the center of the bag to make a bag-type electrode, and the 9 bag-type electrodes were placed in the electrolytic cell, 3 of them are connected in parallel to the negative pole of the power supply, and the other 6 are placed in two rows (3 in each row) and connected in parallel to the positive pole of the power supply, and 3 parallel negative poles are placed in the middle of the two rows of positive poles, with an interval of 40mm. Use the waste acid solution (density 1.28g / ml) poured out of the waste lead battery, add alkaline water (the addition of NaOH is 7%) to make the...

Embodiment 3

[0019] Embodiment 3: get 51 altogether of 40Ah~150Ah type of automobile starting battery, pour out acid solution, after dismantling battery, sort out lead material and crush and obtain 2~6mm granular lead material (grid and lead plaster mixture) altogether 763kg . Evenly distribute and put into 160 polypropylene cloth bags, insert a lead alloy conductive strip with a diameter of 16mm and a length of 500mm in the center of the bag to make a bag-type electrode, divide the 160 bag-type electrodes into 8 groups, 20 in each group, and connect 4 in parallel It is a row, placed in 8 independent electrolyzers, and the 8 independent electrolyzers are connected in series in a DC circuit by using three rows of positive poles and two rows of negative poles. Use the waste acid solution (density 1.30g / ml) poured out of the waste lead battery, add alkaline water (the addition of NaOH is 5%) to make the pH = 7.0, and prepare the electrolyte. The cell voltage between the electrodes is 3.0 ~ 3....

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Abstract

The invention relates to a plumbum reclaiming method for a waste plumbum acid accumulator, and also relates to a method to process the waste plumbum acid accumulator, in particular to a method in which a wet method is used to reclaim plumbum from the material containing plumbum in the waste plumbum acid accumulator. The mixed material of the plate grid containing plumbum of the waste accumulator and plumbum paste is broken up to reach the granularity of 2 mm to 8 mm. The mixed material is filled in a column-shaped cloth bag to make a bag-shaped electrode and is put into the waste acid liquid of the waste accumulator to be electrolyzed. The plumbum material at the cathode is deoxidized into sponge plumbum, simultaneously the plumbum material at the anode is translated, desulfurized and oxygenated. A plurality of middle working procedures and assistant electrodes in the reclaiming using wet method at present are excused in the method of the invention, and the invention has better effect for improving production work efficiency and reducing reclaiming cost. The reclaiming is processed under the condition of moisture and normal temperature, and pollution of plumbum dust, plumbum vapor, plumbum residue and sulfur dioxide can not be generated. Water can be in recycling use. The invention is a clean and environmental protecting method for reclaiming the waste plumbum acid accumulator.

Description

technical field [0001] The invention relates to a treatment method for waste lead-acid batteries, in particular to a method for recovering metallic lead from lead-containing materials of waste lead-acid batteries by wet method. Background technique [0002] The treatment of waste lead-acid batteries is generally divided into fire method, wet method and combined method of fire method and wet method. With the increasing requirements of policies and regulations on environmental protection, wet recycling of waste lead batteries has many advantages in terms of environmental protection. Wet recovery and treatment of waste lead-acid batteries can be roughly classified into the following categories. One is the lead paste conversion-leaching-electrodeposition method. Dissolve lead sulfate and lead oxide in acid (or alkali) solution to make lead salt electrolyte, use graphite or titanium plate as insoluble anode in the electrolytic cell, stainless steel plate as cathode, and generate...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 竺培显李仲揆王勋业
Owner KUNMING UNIV OF SCI & TECH
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