Waste diachylon desulphurization method

A lead paste, waste technology, applied in waste collector recycling, battery recycling, recycling technology and other directions, can solve problems such as heavy burden and high energy consumption, and achieve the effect of increasing desulfurization conversion efficiency, improving desulfurization efficiency, and reducing time consumption

Inactive Publication Date: 2014-03-12
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for desulfurizing waste lead plaster with low cost, simple operation and high desulfurization efficiency, which can effectively reduce the sulfur content in lead plaster, and solve the heavy burden of tail gas desulfurization terminal treatment in the current recycled lead recovery process and the follow-up High energy consumption in the smelting process

Method used

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  • Waste diachylon desulphurization method

Examples

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Embodiment 1

[0034] Example 1: Take the broken and sorted lead paste (the S content is about 5.2% according to XRD quantitative analysis, so it is speculated that the lead sulfate content in the lead paste is about 50%) and dry at 120°C for 2 hours, and then preliminarily screen and remove The plastic particles in it are then subjected to strong grinding and screening, and the lead paste with a particle size of 300-350 μm is selected and added to the reaction tank, and Na 2 CO 3 As a desulfurization conversion agent, the reaction is carried out according to the following conditions: reaction time 30min, reaction temperature 40°C, reaction molar ratio 1:1, reaction liquid-solid ratio 1:1, lead paste particle size 300-350μm, stirring speed 200r / min. The reaction molar ratio is the molar ratio of the desulfurizing agent to the lead sulfate contained in the lead plaster, and the reaction liquid-solid ratio is the ratio of the mass of the desulfurizing agent aqueous solution to the mass of the ...

Embodiment 2

[0036] Example 2: First take 30.26g of broken and sorted lead paste and dry it at 120°C for 2 hours, then preliminarily screen and remove the plastic particles in it, then carry out strong grinding and screening, and select the lead paste with a particle size of 200-300 μm to add In the reaction tank, use (NH 4 )2 CO 3 As a desulfurization conversion agent, the reaction is carried out according to the following conditions: reaction time 40min, reaction temperature 50°C, reaction molar ratio 1.1:1, reaction liquid-solid ratio 2:1, lead paste particle size 200-300μm, stirring speed 200r / min. After the reaction, the analysis of the mixture shows that the desulfurization rate of the lead paste is about 92.0%.

Embodiment 3

[0037] Example 3: Take 30.26g of crushed and sorted lead paste and dry at 120°C for 2 hours, then preliminarily screen and remove the plastic particles in it, and then carry out strong grinding and screening, and select the lead paste with a particle size of 100-200 μm to add In the reaction tank, use NH 4 HCO 3 As a desulfurization conversion agent, the reaction is carried out according to the following conditions: reaction time 50min, reaction temperature 60°C, reaction molar ratio 1.2:1, reaction liquid-solid ratio 5:1, lead paste particle size 100-200μm, stirring speed 200r / min. After the reaction, the analysis of the mixture shows that the desulfurization rate of the lead paste is about 93.7%.

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Abstract

The invention discloses a waste diachylon desulphurization method which comprises the following steps: A, adding waste lead-acid storage batteries into crushing and sorting system equipment to carry out crushing and sorting; B, drying sorted diachylon at a temperature of 120 DEG C for later use; C, carrying out grinding and screening on the dried diachylon; D, adding diachylon particles with the uniform size, which are obtained in the step C, into a canned reactor, then adding a desulfurizer and water and stirring to perform the reaction for certain time; E, transporting a mixture in a can, which is obtained after reaction, to a filter press to carry out filter pressing and carrying out separation to obtain a diachylon cake and a filtrate. The method disclosed by the invention has a high lead recovery rate, is low in cost, has low energy consumption and is short in time consumption.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for desulfurizing waste lead plaster. Background technique [0002] Compared with Ni-Cd batteries, lithium-ion batteries and other electrochemical batteries, lead-acid batteries have the advantages of low cost, simple design, safe and reliable performance in manufacturing. In view of these advantages, it is expected that the market for lead-acid batteries in engine starting, lighting, and ignition of vehicles (such as automobiles, ships, and airplanes) will be huge in the next few years, and will grow steadily until bicycles and electric vehicles really enter the market. Therefore, it can be expected that when high-capacity lead-acid batteries are put into industrial applications, the output of lead-acid batteries will continue to grow even rapidly in the future. In 2010, the consumption of refined lead reached 4.21 million tons, and 80% of refined lead in China was used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B21/00
CPCC22B7/00C22B13/00H01M10/54Y02P10/20Y02W30/84
Inventor 舒月红高倩陈红雨
Owner SOUTH CHINA NORMAL UNIVERSITY
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