Ball-milling debromination method for nonmetal components of waste circuit board

A waste circuit board and non-metallic technology, which is applied to chemical instruments and methods, solid waste removal, solid separation, etc., can solve the problems of easy damage to the non-metallic component resin structure, and the effect of debromination by ball milling is not obvious, and achieves remarkable results. Economic benefits, easy to break, improve the effect of debromination

Inactive Publication Date: 2020-04-17
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the prior art that thermal debromination is easy to destroy the resin structure of non-metal

Method used

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  • Ball-milling debromination method for nonmetal components of waste circuit board
  • Ball-milling debromination method for nonmetal components of waste circuit board

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1 A method for debromination by ball milling of non-metallic components of waste circuit boards

[0035] The following methods are used to debrominate the non-metal components of waste circuit boards by ball milling:

[0036] S1. Hammer crush the waste circuit board to obtain particles with a particle size of 5 mm, use a magnetic separator to separate and recover magnetic metals such as iron and nickel, and use high-voltage electrostatic separation to recover non-magnetic metals such as copper and zinc to obtain a metal group. components and non-metallic components;

[0037] S2. Mix 0.96 g of the non-metallic component obtained in step S1 and 0.24 g of nano-zero valent iron, and place it in a planetary ball mill. 30h, at the same time, the gas in the ball mill was extracted and absorbed with sodium carbonate solution;

[0038] S3, collecting the ball-milled material in step S2, and using a magnetic separator to separate the nano-zero valent iron by magnetic se...

Example Embodiment

[0039] Example 2 Ball milling debromination method for non-metallic components of waste circuit boards

[0040] The following methods are used to debrominate the non-metal components of waste circuit boards by ball milling:

[0041] S1. Hammer crush the waste circuit board to obtain particles with a particle size of 5 mm, use a magnetic separator to separate and recover magnetic metals such as iron and nickel, and use high-voltage electrostatic separation to recover non-magnetic metals such as copper and zinc to obtain a metal group. components and non-metallic components;

[0042] S2. Mix 1.20 g of the non-metallic component obtained in step S1 and 0.24 g of nano-zero valent iron, and place it in a planetary ball mill. 30h, at the same time, the gas in the ball mill was extracted and absorbed with sodium carbonate solution;

[0043] S3, collecting the ball-milled material in step S2, and using a magnetic separator to separate the nano-zero valent iron by magnetic separation...

Example Embodiment

[0044] Example 3 Ball milling debromination method for non-metallic components of waste circuit boards

[0045] The following methods are used to debrominate the non-metal components of waste circuit boards by ball milling:

[0046] S1. Hammer crush the waste circuit board to obtain particles with a particle size of 4 mm. Use a magnetic separator to separate and recover magnetic metals such as iron and nickel, and use high-voltage electrostatic separation to recover non-magnetic metals such as copper and zinc to obtain a metal group. components and non-metallic components;

[0047] S2. Mix 1.08 g of the non-metallic component obtained in step S1 and 0.24 g of nano-zero valent iron, and place it in a planetary ball mill. 30h, at the same time, the gas in the ball mill was extracted and absorbed with sodium carbonate solution;

[0048] S3, collecting the ball-milled material in step S2, and using a magnetic separator to separate the nano-zero valent iron by magnetic separation t...

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Abstract

The invention belongs to the technical field of solid waste recovery, and particularly relates to a ball-milling debromination method for nonmetal components of a waste circuit board. According to themethod, ball-milling debromination is carried out on nano zero-valent iron and the nonmetal components which are obtained after the waste circuit board is crushed and sorted, bromine in the nonmetalcomponents can be remarkably removed, the main structure of resin in the nonmetal components is reserved, meanwhile, the nano zero-valent iron can be continuously recycled, the cost is saved, the nonmetal components are effectively and safely recycled, the whole process is environmental-friendly, secondary pollution is avoided, and remarkable economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling. More specifically, it relates to a ball milling debromination method for non-metallic components of waste circuit boards. Background technique [0002] With the continuous development of economy and science and technology, electronic products are gradually popularized all over the world and are constantly being updated. At the same time, the amount of electronic waste is also increasing rapidly. Printed circuit boards are relatively important components in various electronic and electrical products. With the generation of a large amount of electronic waste, waste circuit boards have also become the most typical solid waste in modern cities. As far as China is concerned, more than 500,000 tons of waste circuit boards need to be disposed of urgently every year. [0003] Waste circuit boards are composed of 30% metal components and 70% non-metal components, which contain abundant res...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00B02C17/08B02C17/20B02C17/18B02C25/00B02C21/00B02C23/14B03C1/30
CPCB02C17/08B02C17/18B02C17/20B02C21/00B02C23/14B02C25/00B02C2201/06B03C1/30B09B3/00B09B5/00Y02W30/82
Inventor 阮菊俊陈曦秦保家
Owner SUN YAT SEN UNIV
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