Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF6 Cites 0 Cited by
  • 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-metallic components, and the debromination effect of ball milling is not obvious. The application of debromination can maintain the resin structure of non-metallic components and improve the debromination effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Embodiment 1

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

[0035] Use the following method to debrominate the non-metallic components of waste circuit boards by ball milling:

[0036] S1. Hammer crush waste circuit boards to obtain particles with a particle size of 5mm. Magnetic separators are used to separate and recover magnetic metals such as iron and nickel, and high-voltage electrostatic separation is used to recover non-magnetic metals such as copper and zinc to obtain metal groups. Parts and non-metallic components;

[0037] S2. Mix 0.96g of the non-metallic component obtained in step S1 with 0.24g of nanometer zero-valent iron, place it in a planetary ball mill, set the speed of the ball mill to 220r / min, change the direction of rotation once every 30min, and use 5mm balls for ball milling 30h, at the same time pump out the gas in the ball mill and absorb it with sodium carbonate solution;

[0038] S3. Collect the ba...

Embodiment 2

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

[0040] Use the following method to debrominate the non-metallic components of waste circuit boards by ball milling:

[0041] S1. Hammer crush waste circuit boards to obtain particles with a particle size of 5mm. Magnetic separators are used to separate and recover magnetic metals such as iron and nickel, and high-voltage electrostatic separation is used to recover non-magnetic metals such as copper and zinc to obtain metal groups. Parts and non-metallic components;

[0042] S2. Mix 1.20 g of the non-metallic component obtained in step S1 with 0.24 g of nanometer zero-valent iron, place in a planetary ball mill, set the speed of the ball mill to 220r / min, change the direction of rotation once every 30min, and use 5mm balls for ball milling 30h, at the same time pump out the gas in the ball mill and absorb it with sodium carbonate solution;

[0043] S3. Collect the bal...

Embodiment 3

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

[0045] Use the following method to debrominate the non-metallic components of waste circuit boards by ball milling:

[0046] S1. Hammer crush waste circuit boards to obtain particles with a particle size of 4 mm. Magnetic separators are used to separate and recover magnetic metals such as iron and nickel, and high-voltage electrostatic separation is used to recover non-magnetic metals such as copper and zinc to obtain metal groups. Parts and non-metallic components;

[0047] S2. Take 1.08 g of non-metallic components obtained in step S1 and mix them with 0.24 g of nanometer zero-valent iron, place them in a planetary ball mill, set the speed of the ball mill to 220r / min, change the direction of rotation once every 30min, and use 8mm balls for ball milling 30h, at the same time pump out the gas in the ball mill and absorb it with sodium carbonate solution;

[0048] S3. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com