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Flotation separation method for multi-component waste plastic

A separation method and multi-component technology, applied in the direction of plastic recycling, mechanical material recycling, recycling technology, etc., to achieve continuous and efficient separation, wide application range, and increase the effect of reaction rate

Inactive Publication Date: 2020-11-03
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of their achievements are limited to the separation of a single specific plastic component from complex components, and e-waste plastics come from a wide variety of sources, and how to achieve continuous and efficient separation of different components of e-waste plastics has not yet been reported.

Method used

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  • Flotation separation method for multi-component waste plastic
  • Flotation separation method for multi-component waste plastic
  • Flotation separation method for multi-component waste plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment includes the following steps:

[0063] Step 1. Pre-treatment: Soak multi-component waste plastics in tap water containing detergent for 20 minutes to remove grease, then rinse with tap water for 3 times, then soak in tap water for 5 minutes, take it out, place it on filter paper and let it dry naturally at room temperature Air-dried; the multi-component plastic includes polycarbonate, acrylonitrile-butadiene-styrene copolymer, polypropylene and polyvinyl chloride in a mass ratio of 1:1:1:1, and the multi-component plastic comes from household Plastic products of electrical refrigerators, washing machines, air conditioners, and TV casings;

[0064] Step 2, crushing and screening: the multi-component waste plastics that have been naturally air-dried in step 1 are crushed with a pulverizer, and then sieved to obtain multi-component waste plastic particles; the multi-component waste plastics The particle size of the particles is 4mm ~ 6mm;

[0065] Step 3....

Embodiment 2

[0094] This embodiment includes the following steps:

[0095] Step 1. Pre-treatment: Soak the multi-component waste plastic in tap water containing detergent for 15 minutes to remove grease, then rinse it repeatedly with tap water 4 times, then soak in tap water for 4 minutes, take it out, place it on filter paper and let it dry naturally at room temperature Air-dried; the multi-component plastic includes polycarbonate, acrylonitrile-butadiene-styrene copolymer, polypropylene and polyvinyl chloride in a mass ratio of 1:1:1:1, and the multi-component plastic comes from household Plastic products of electrical refrigerators, washing machines, air conditioners, and TV casings;

[0096] Step 2, crushing and screening: the multi-component waste plastics that have been naturally air-dried in step 1 are crushed with a pulverizer, and then sieved to obtain multi-component waste plastic particles; the multi-component waste plastics The particle size of the particles is 4mm ~ 6mm;

[...

Embodiment 3

[0114] This embodiment includes the following steps:

[0115] Step 1. Pre-treatment: Soak the multi-component waste plastic in tap water containing detergent for 10 minutes to remove grease, then rinse it repeatedly with tap water 5 times, then soak in tap water for 3 minutes, take it out, place it on filter paper and let it dry naturally at room temperature Air-dried; the multi-component plastics include polycarbonate, acrylonitrile-butadiene-styrene copolymer, polypropylene and polyvinyl chloride in a mass ratio of 1:2:1:2, and the multi-component plastics are from household Plastic products of electrical refrigerators, washing machines, air conditioners, and TV casings;

[0116] Step 2, crushing and screening: the multi-component waste plastics that have been naturally air-dried in step 1 are crushed with a pulverizer, and then sieved to obtain multi-component waste plastic particles; the multi-component waste plastics The particle size of the particles is 4mm ~ 6mm;

[0...

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Abstract

The invention discloses a flotation separation method for multi-component waste plastic. The method comprises the following steps: firstly, pretreating multi-component plastic by combining microwave irradiation with a Fenton reagent, and performing separating by using a multi-stage flotation technique to obtain multiple kinds of single-component plastic. The Fenton reagent is a mixed solution of hydrogen peroxide and ferrous ions, and the multi-component plastic comprises polycarbonate, an acrylonitrile-butadiene-styrene copolymer, polypropylene and polyvinyl chloride. According to the method,microwaves are combined with the Fenton reagent to pretreat the multi-component plastic, so that hydrophilicity and hydrophobicity of the surfaces of the multi-component plastic are different, the floatability is different, then step-by-step flotation separation is conducted, the single-component plastic is obtained, continuous and efficient separation of the multi-component plastic is achieved,the application range is wide, the application value is high, and industrial application is easily achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste pollution prevention and resource utilization, and in particular relates to a flotation separation method for multi-component waste plastics. Background technique [0002] Electronic waste, commonly known as "electronic waste", refers to electronic equipment or electrical appliances that are discarded and no longer used. Common electronic waste includes mobile phones, telephones, computers and other electronic products, as well as refrigerators, washing machines, air conditioners, TVs, etc. household appliances. [0003] Plastic and metal are the two main types of recyclable resources in e-waste. In the process of resource utilization of electronic waste, people pay more attention to the recycling of rare and precious metals in electronic waste, and related technologies are gradually becoming mature, while the recycling of plastics has not received enough attention. The plastics in electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/02B29B17/00
CPCB29B17/00B29B17/02B29B2017/001B29B2017/0203B29B2017/0244Y02W30/52Y02W30/62
Inventor 李彦鹏屈延辉王金龙李文天邹小彤徐开伟
Owner CHANGAN UNIV
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