Method and device for recovering metallic lead from lead plaster of waste lead-acid storage battery

A technology for waste lead-acid batteries and lead-acid batteries, which is applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of small application range and low added value, and achieves wide application range, continuous operation and low equipment cost. Effect

Active Publication Date: 2011-04-27
北京绿色引领环保科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead is recovered in the form of lead chloride, which is not simple lead, and the product application range is small and the added value is low.

Method used

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  • Method and device for recovering metallic lead from lead plaster of waste lead-acid storage battery
  • Method and device for recovering metallic lead from lead plaster of waste lead-acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 10kg of waste lead-acid battery lead paste with 10kg of waste sulfuric acid in lead-acid batteries and then roast it at a temperature of 150°C for 4 hours; put the roasting sand into a stirring tank; add tap water 0.1m 3 To, stir the roasted sand; add calcium acetate concentration to 100g / L, acetic acid concentration to 75 g / L, nitric acid concentration to 50 g / L, turn on the pump of the solution circulation system to circulate the immersion solution in the electrolytic tank and stirring tank, and leaching Calcined sand, leaching temperature is 50°C, leaching time is 1h; add bone glue to a concentration of 0.1g / L, β-naphthol concentration is 0.05g / L, electrolyze lead at 50°C, cathode current density is 1A / dm 2 ; Electrolysis 5h. The cathode recycles lead, the anode recycles lead dioxide, and the current efficiency is 97.1%. The residue is filtered by a filter press to obtain lead-free slag, and the filtrate is recovered and recycled.

Embodiment 2

[0029] Mix 10kg of waste lead-acid battery lead paste with 10kg of waste sulfuric acid in lead-acid batteries and then roast it at a temperature of 280°C for 1 hour; put the roasting sand into a stirring tank; add tap water 0.1m 3 To, stir the roasted sand; add calcium acetate concentration to 200g / L, acetic acid concentration to 50 g / L, nitric acid concentration to 75 g / L, turn on the pump of the solution circulation system to circulate the immersion solution in the electrolytic tank and stirring tank, and leaching Calcined sand, leaching temperature is 40°C, leaching time is 2h; add bone glue to a concentration of 0.2g / L, β-naphthol concentration to 0.5g / L, electrolyze lead at 40°C, and a cathode current density of 0.5A / dm 2 ; Electrolysis 5h. The cathode recycles lead, the anode recycles lead dioxide, and the current efficiency is 98.9%. The residue is filtered by a filter press to obtain lead-free slag, and the filtrate is recovered and recycled.

Embodiment 3

[0031] Mix 10kg of waste lead-acid battery lead paste with 10kg of waste sulfuric acid in lead-acid batteries and then roast at a temperature of 200°C for 2 hours; put the roasting sand into a stirring tank; add 0.1m of tap water 3 To, stir the roasted sand; add calcium acetate concentration to 150g / L, acetic acid concentration to 100 g / L, nitric acid concentration to 100 g / L, turn on the pump of the solution circulation system to circulate the immersion solution in the electrolytic tank and stirring tank, and leaching Calcined sand, the leaching temperature is 30°C, the leaching time is 3h; add bone glue to a concentration of 2.5g / L, the concentration of β-naphthol is 0.01g / L, lead electrolysis at 30°C, and the cathode current density is 5A / dm 2 ; Electrolysis 5h. The cathode recycles lead, the anode recycles lead dioxide, and the current efficiency is 98.1%. The residue is filtered by a filter press to obtain lead-free slag, and the filtrate is recovered and recycled.

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Abstract

The invention belongs to recovery treatment on lead plaster of a waste lead-acid storage battery. The method comprises the following steps of: mixing the lead plaster of the waste lead-acid storage battery with waste sulfuric acid in the waste lead-acid storage battery according to the design requirement and roasting; adding roasting sand in a stirring kettle; adding tap water to a water level line of the device and stirring the roasting sand; adding a proper amount of calcium acetate, acetic acid and nitric acid; starting a solution circulating system pump, leaching out the roasting sand and maintaining the concentration of lead acetate to be saturated; adding a proper amount of bone glue and beta-naphthol, electrolyzing immersion liquid, recovering the metallic lead at the cathode and recovering lead dioxide at the anode; press filtering residues to obtain lead-off slag and filtrate; and adding calcium carbonate in the filtrate and recycling. The device mainly comprises a leaching part, a press filtration part, a circulating part and an electrolysis part, and concretely includes eight key components of the stirring kettle, a press filter, an overflow port, an electrolysis direct current power supply, an electrolytic cell, a cathode titanium basket, a corrosion resistant pump and a heating element.

Description

[0001] technical field [0002] The invention belongs to the recovery and treatment of lead paste of waste lead-acid batteries, and in particular relates to a method and a device for green recovery of lead in lead paste of waste lead-acid batteries by adopting roasting-acetic acid system cyclic leaching-electrolytic recovery of metallic lead. [0003] Background technique [0004] my country is a big country of storage battery use. There are about 40 million vehicles in the country. According to the calculation of 30 kilograms of lead in each vehicle storage battery and 2 years of storage battery life, 600,000 tons of storage battery lead is required every year. The vast majority of electric bicycles use lead-acid batteries. According to statistics, in 2009, my country produced a total of 23 million electric bicycles. It is roughly estimated that each electric bicycle uses 10 kilograms of lead, which is equivalent to using 230,000 tons of lead metal. . Since the average lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C1/18
CPCY02P10/20
Inventor 潘德安张深根李彬田建军章端婷蒋钰辉
Owner 北京绿色引领环保科技研究院有限公司
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