Waste lead recovering method for lead-acid storage batteries

A lead-acid battery, lead recycling technology, applied in photography technology, instruments, photography auxiliary technology and other directions, can solve the problems of high energy consumption and serious pollution, achieve low energy consumption, high recycling rate, and reduce the discharge of waste liquid Effect

Inactive Publication Date: 2009-12-23
张天任
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2. High energy consumpt

Method used

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  • Waste lead recovering method for lead-acid storage batteries

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Embodiment Construction

[0023] (1) Sorting the lead waste first, and dividing them into coarse and fine materials; coarse materials include busbars, grids, and poles, which are directly melted into ingots; fine materials include lead paste, waste lead powder generated during production, and lead slag, lead mud;

[0024] (2) Get 1000 kilograms of the fine material that step (1) obtains and add in the reactor that stirrer is arranged, add reducing agent FeSO in the reactor simultaneously 4 300 kg, specific gravity 1.2g / cm 3 Dilute sulfuric acid 200L, stir and react at 50-60°C for 50-70 minutes, reduce lead dioxide to lead sulfate, a low-valence lead compound, filter the reacted material to obtain 1200 kg of solid lead sulfate, and recycle the filtrate ;

[0025] (3) Add 1,000 kilograms of lead sulfate obtained in step (2) into a reactor with a stirring device, add 800 kilograms of water to make a slurry, then add 350 kilograms of desulfurizing agent sodium carbonate for desulfurization treatment. Do...

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Abstract

The invention discloses a waste lead recovering method for lead-acid storage batteries. The method comprises the following steps: fine stuff such as diachylon and the like are added in a reaction kettle with a stirring device; reducing agent (FeSO4) and dilute sulfuric acid are simultaneously added; stirring reaction is carried out at the temperature of 50-60 DEG C for 50-70 minutes so as to reduce lead dioxide into lead sulfate; the lead sulfate is added into the reaction kettle with the stirring device; water is simultaneously added into the reaction kettle for size mixing; then sodium carbonate is added; desulfuration is carried out at the temperature of 50-60 DEG C so as to obtain solid lead carbonate; the lead carbonate is put into a smelting furnace and then decomposed at the temperature of 320-350 DEG C so as to obtain lead oxide; and reducing agent (carbon) is added into the smelting furnace to reduce the lead oxide into metal lead at the temperature of 700-800 DEG C. The method recovers the lead by means of the combination of the wet and the dry processes, thereby avoiding the harm to the environment caused by lead dust, lead vapor, lead skim, sulfur dioxide gas, and the like by adopting fire smelting. The method has the advantages of high lead recovery rate, low energy consumption and no environment pollution.

Description

technical field [0001] The invention relates to a lead-acid storage battery, in particular to the recovery of waste lead from the lead-acid storage battery, and is a method with low energy consumption, no pollution and high lead recycling rate. Background technique [0002] With the rapid development of automobiles, communications, electric power, railways and transportation, and under the background of global advocacy of green environmental protection concepts, the demand for various lead-acid batteries is increasing day by day, and various types of waste lead-acid batteries are also increasing accordingly. At present, there are about 50-60 million waste lead-acid batteries produced in my country every year, with a weight of about 300,000 tons, which puts forward higher requirements for the recycling of lead. [0003] At present, there are nearly 300 secondary lead enterprises in my country, most of which are small in scale, with an annual output ranging from tens to thousa...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00C22B3/46C22B5/10C25C1/18
CPCY02P10/20
Inventor 王杜友任安福杨惠强陈建强胡建强
Owner 张天任
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