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Method for separating plastics from metals in electronic waste

A technology for electronic waste and materials, applied in the direction of electronic waste recycling, solid waste removal, wet separation, etc., can solve the problems of inability to completely separate plastics and metals, environmental hazards, etc., to increase comprehensive utilization value, environmental friendliness, good practical effect

Active Publication Date: 2016-11-16
朱建裕 +7
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the pyrolysis process, the high-temperature decomposition of non-metallic materials will produce a large amount of smoke or toxic gases, which will cause great harm to the environment.
The mechanical physical separation method is friendly to the environment and saves energy. However, the conventional mechanical separation method cannot completely separate plastics and metals.

Method used

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  • Method for separating plastics from metals in electronic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The method described in this embodiment mainly proceeds according to the following steps:

[0021] (1) Manually disassemble electronic waste from a certain source, recycle the shell, conduct functional testing on its electronic components, and directly recycle electronic components that have not lost their functions;

[0022] (2) Cut the disassembled and disabled electronic components in (1) into fragments with a diameter of < 3cm and mix them, then crush the fragments with an ore crusher to a powder with a particle size of about 0.1 mm and mix them evenly;

[0023] (3) The material crushed in step (2) was modified with diesel oil for 10 minutes;

[0024] (4) Density sort the material modified in step (3) in a 2 L container, and the container contains 1 L of CaCl with a density of 1.30g / ml 2 Sorting liquid, 50 g of electronic waste material, and use a mechanical stirrer to fully stir it, and then let it stand until the plastic is fully floating and the metal is fully s...

Embodiment 2

[0027] The method described in this embodiment mainly proceeds according to the following steps:

[0028] (1) Manually disassemble electronic waste from a certain source, recycle the shell, conduct functional testing on its electronic components, and directly recycle electronic components that have not lost their functions;

[0029] (2) Cut the disassembled electronic components that have lost their function in (1) into fragments with a diameter of < 3cm and mix them, and then use an ore crusher to crush the fragments into powders with a particle size of about 0.1 mm and mix them evenly;

[0030] (3) The material crushed in step (2) was modified with diesel oil for 20 minutes;

[0031] (4) Density sort the material modified in step (3) in a 2 L container, and the container contains 1 L of CaCl with a density of 1.30g / ml 2 Sorting liquid, 75 g of electronic waste material, and use a mechanical stirrer to fully stir it, and then let it stand until the plastic is fully floating ...

Embodiment 3

[0034] The method described in this embodiment mainly proceeds according to the following steps:

[0035] (1) Manually disassemble electronic waste from a certain source, recycle the shell, conduct functional testing on its electronic components, and directly recycle electronic components that have not lost their functions;

[0036] (2) Cut the disassembled and disabled electronic components in (1) into fragments with a diameter of < 3cm and mix them, then crush the fragments with an ore crusher to a powder with a particle size of about 0.1 mm and mix them evenly;

[0037] (3) The material obtained by crushing in step (2) is modified with diesel oil for 30 minutes;

[0038] (4) Density sort the material modified in step (3) in a 2 L container, and the container contains 1 L of CaCl with a density of 1.30g / ml 2 Sorting liquid, 75 g of electronic waste material, and use a mechanical stirrer to fully stir it, and then let it stand until the plastic is fully floating and the meta...

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Abstract

The present invention provides a method for separating plastics from metals in an electronic waste. The method comprises the following steps: (1) disassembling an electronic waste, performing functional detection on electronic elements in the electronic waste, and directly recovering electronic elements that are still functional; (2) breaking electronic elements that are already nonfunctional from step (1) to obtain materials having a grain size of 0.02 to 0.4 mm; (3) soaking the broken materials from step (2) in diesel oil and / or kerosene for 10-30 min; and (4) putting the soaked materials from step (3) in CaCl2 solution for density separation to separate plastics from metals. The method provided by the present invention allows a significant increase in the rate of separation of the plastics from metals and an increase in comprehensive use value of the electronic waste, and is simple in operation, environmentally friendly, and highly practical.

Description

technical field [0001] The invention relates to a method for separating plastics and metals from electronic waste, and belongs to the technical field of recycling and reuse of electronic waste resources. Background technique [0002] Electronic waste (also known as electronic waste) refers to household appliances and electronic products such as televisions, refrigerators, washing machines, air conditioners, computers, mobile phones, and tape recorders that are eliminated or scrapped in daily life. With the continuous development of social economy and continuous progress of science and technology, the replacement of electronic products has accelerated, forming a large amount of electronic waste. Because electronic waste contains heavy metals and other toxic and harmful organic substances, such as lead, nickel, mercury, polychlorinated biphenyls and polybrominated diphenyl ethers, if not treated, it will pose a serious threat to the human living environment and people's health...

Claims

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Application Information

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IPC IPC(8): B09B3/00B03B1/00B03B5/36
CPCB03B1/04B29B17/02B29B2017/0244Y02W30/62Y02W30/82
Inventor 朱建裕
Owner 朱建裕
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