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 to the improvement of process efficiency, photography technology, instruments, etc., to achieve the effect of simple method, simple structure and continuous operation

Active Publication Date: 2012-11-28
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

[0005] The purpose of the invention mainly solves the recovery problem of lead in the lead paste of waste lead-acid batteries

Method used

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  • 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

[0023] Mix 10kg of lead-acid battery lead paste with 10kg of lead-acid battery’s waste sulfuric acid and then roast. The roasting temperature is 150℃, and the roasting time is 4h; put the roasting sand into the stirring tank; add 0.1m tap water 3 To, stir the roasting sand; add calcium acetate concentration to 100g / L, acetic acid concentration to 75g / L, nitric acid concentration to 50g / L, turn on the solution circulation system pump, make the immersion liquid circulate in the electrolytic tank and stirring tank, and leaching the roasting sand , Leaching temperature is 50℃, leaching time is 1h; add bone glue to a concentration of 0.1g / L, β-naphthol concentration is 0.05g / L, electrolysis lead at 50℃, cathode current density is 1A / dm 2 ; Electrolysis 5h. The cathode recovers lead and the anode recovers lead dioxide, and the current efficiency is 97.1%. The residue is filtered by a filter press to obtain deleaded residue, and the filtrate is recycled for recycling.

Embodiment 2

[0025] Mix 10kg of lead-acid battery lead paste with 10kg of lead-acid battery’s waste sulfuric acid and then roast. The roasting temperature is 280℃, and the roasting time is 1h; put the roasting sand in the stirring tank; add 0.1m tap water 3 To, stir the roasting sand; add calcium acetate concentration to 200g / L, acetic acid concentration to 50g / L, nitric acid concentration to 75g / L, turn on the solution circulation system pump, make the immersion liquid circulate in the electrolytic tank and stirred tank, and leaching the roasting sand , Leaching temperature is 40℃, leaching time is 2h; add bone glue to a concentration of 0.2g / L, β-naphthol concentration is 0.5g / L, electrolysis lead at 40℃, cathode current density is 0.5A / dm 2 ; Electrolysis 5h. The cathode recovers lead and the anode recovers lead dioxide, and the current efficiency is 98.9%. The residue is filtered by a filter press to obtain deleaded residue, and the filtrate is recycled for recycling.

Embodiment 3

[0027] Mix 10kg of lead-acid battery lead paste with 10kg of lead-acid battery’s waste sulfuric acid and then roast. The roasting temperature is 200℃, and the roasting time is 2h; put the roasting sand in the stirring tank; add 0.1m tap water 3 To, stir the roasting sand; add calcium acetate concentration to 150g / L, acetic acid concentration to 100g / L, nitric acid concentration to 100g / L, turn on the solution circulation system pump, make the immersion liquid circulate in the electrolytic tank and the stirred tank, and leaching the roasting sand , The leaching temperature is 30℃, the leaching time is 3h; add bone glue to a concentration of 2.5g / L, β-naphthol concentration is 0.01g / L, lead electrolysis at 30℃, cathode current density is 5A / dm 2 ; Electrolysis 5h. The cathode recovers lead and the anode recovers lead dioxide, and the current efficiency is 98.1%. The residue is filtered by a filter press to obtain deleaded residue, and the filtrate is recycled for recycling.

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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 andmaintaining 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 directcurrent power supply, an electrolytic cell, a cathode titanium basket, a corrosion resistant pump and a heating element.

Description

Technical field [0001] The invention belongs to the recovery and treatment of lead paste of waste lead-acid battery, and particularly relates to a method and device for green recovery of lead in waste lead-acid battery lead paste by adopting a roasting-acetic acid system cyclic leaching-electrolysis to recover metal lead. Background technique [0002] my country is a big battery-using country. There are about 40 million cars in the country. If each car battery contains 30 kilograms of lead and the battery has a service life of 2 years, it needs 600,000 tons of battery lead each year. Most electric bicycles use lead-acid batteries. According to statistics, in 2009, my country produced a total of 23 million electric bicycles. A rough estimate of 10 kilograms of lead per electric bicycle is equivalent to 230,000 tons of lead metal. . As lead-acid batteries have an average life span of 1 to 2 years, the electric vehicle industry scraps millions of tons of lead-acid batteries every ye...

Claims

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Application Information

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Patent Type & Authority Patents(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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