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Method for separating and recycling materials of each component in waste printed circuit board

The technology of a printed circuit board and a recycling method is applied to the separation and recovery of each component material in waste printed circuit boards, and the field of waste printed circuit board recycling, which can solve the problems of one-sided resource recovery, high recovery cost, environmental pollution, etc. Achieve the effect of efficient separation and recycling, simple and feasible process, and good social benefits

Inactive Publication Date: 2009-12-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of environmental pollution, one-sidedness of resource recovery and high recycling cost in the recycling process of waste printed circuit boards, and to provide a clean and efficient method for separating and Recycling method, which separates all component materials in waste printed circuit boards and recycles them, so as to realize comprehensive recovery, regeneration and resource utilization of waste printed circuit boards

Method used

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  • Method for separating and recycling materials of each component in waste printed circuit board

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Experimental program
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Effect test

Embodiment 1

[0021] a. Place a certain amount of waste printed circuit boards in the vacuum pyrolysis device, start the vacuum pump, reduce and maintain the pressure of the pyrolysis system at 1kPa, then heat to 350°C at a heating rate of 5°C / min and keep the temperature constant for 80min . The volatile gas produced by the vacuum pyrolysis process of organic matter is discharged through the exhaust pipe in the reactor of the vacuum pyrolysis device, and then the gas is condensed into liquid oil and non-condensable gas by the condenser of the vacuum pyrolysis device, and the non-condensable gas enters Gas collection and treatment system for purification treatment. Liquid oil is mainly composed of phenol, p-isopropylphenol, 2-bromophenol, 2,6-dibromophenol and other compounds, which can be used as fuel oil or chemical raw materials after purification. Non-condensable gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide and lower alkanes, etc. It has a certain calorific value...

Embodiment 2

[0027] a. Place a certain amount of waste printed circuit boards in the vacuum pyrolysis device, start the vacuum pump, reduce and maintain the pressure of the pyrolysis system at 30kPa, then heat to 750°C at a heating rate of 25°C / min and keep the temperature constant for 20min . The volatile gas produced by the vacuum pyrolysis process of organic matter is discharged through the exhaust pipe in the reactor of the vacuum pyrolysis device, and then the gas is condensed into liquid oil and non-condensable gas by the condenser of the vacuum pyrolysis device, and the non-condensable gas enters Gas collection and treatment system for purification treatment. Liquid oil is mainly composed of phenol, p-isopropylphenol, 2-bromophenol, 2,6-dibromophenol and other compounds, which can be used as fuel oil or chemical raw materials after purification. Non-condensable gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide and lower alkanes, etc. It has a certain calorific val...

Embodiment 3

[0033] a. Place a certain amount of waste printed circuit boards in the vacuum pyrolysis device, start the vacuum pump, reduce and maintain the pressure of the pyrolysis system at 15kPa, then heat to 550°C at a heating rate of 10°C / min and keep the temperature constant for 50min . The volatile gas produced by the vacuum pyrolysis process of organic matter is discharged through the exhaust pipe in the reactor of the vacuum pyrolysis device, and then the gas is condensed into liquid oil and non-condensable gas by the condenser of the vacuum pyrolysis device, and the non-condensable gas enters Gas collection and treatment system for purification treatment. Liquid oil is mainly composed of phenol, p-isopropylphenol, 2-bromophenol, 2,6-dibromophenol and other compounds, which can be used as fuel oil or chemical raw materials after purification. Non-condensable gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide and lower alkanes, etc. It has a certain calorific val...

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Abstract

The invention discloses a method for separating and recycling the materials of each component in a waste printed circuit board (PCB), and is characterized by subjecting the waste PCB to vacuum pyrolysis, shear breakage, screening classification, gravity separation and medium-temperature calcination, so that all materials of components in the waste PCB can be separated and recycled to obtain organic pyrolytic oil, metal mixtures and glass fiber; wherein, the recycled organic pyrolytic oil can be used as fuel oil or chemical materials, the recycled metal mixtures can be used as metallurgical materials, and the recycled glass fiber can be used as glass fiber processing materials or fillers, thereby achieving the purpose of recycling all resources. The method of the invention can effectively separate and recycle all materials of components in the waste PCB, and has the characteristics that the technological method is simple, feasible, efficient and pollution-free. Therefore, the invention is of great social, economic and environmental benefits.

Description

technical field [0001] The invention relates to recycling technology of waste printed circuit boards, in particular to a method for separating and recycling component materials in waste printed circuit boards, and belongs to the technical field of resource recovery. Background technique [0002] Waste printed circuit boards are an important renewable resource to be redeveloped. At present, the rational disposal and resource utilization of waste printed circuit boards have attracted widespread attention at home and abroad. Waste printed circuit boards contain about 40% metals, 30% plastic resins and 30% inert oxides. The metal parts include: gold, palladium, platinum, silver and other precious metals; rare metals such as rhodium and selenium; copper, Common metals such as aluminum, iron, nickel, lead, tin, and zinc, especially the copper content of which exceeds 20%, have a high degree of resource utilization. At the same time, printed circuit boards contain a large amount o...

Claims

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Application Information

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IPC IPC(8): B09B3/00B02C18/00B02C23/16B07B13/08C03B37/01C22B7/00
CPCY02W30/82
Inventor 孙水裕龙来寿钟胜宋卫锋戴文灿许燕滨谢武明刘敬勇
Owner GUANGDONG UNIV OF TECH
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