Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for separating nonmetal materials from waste circuit boards by flotation

A waste circuit board, non-metallic technology, applied in flotation, solid separation, etc., can solve the problems of low recycling rate, environmental pollution, etc., achieve low production cost, simple process flow, and improve the effect of resource utilization

Active Publication Date: 2011-11-16
广东省资源综合利用研究所
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to effectively solve the problems of low recycling rate and serious environmental pollution in the non-metallic tailings treatment technology obtained by crushing and gravity separation of waste circuit boards, and realize efficient and economical recycling of waste circuit boards

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: After the waste circuit board is crushed and re-selected to recover the metal, 500 grams of tailings are taken and crushed to a size below 0.1 mm. After adding 1500 ml of water to make a slurry, add 0.1 gram of antifoaming agent simethicone and stir for 5 minutes ; Add 500 g / t octadecylamine : Dodecylamine : Mixed amine mass ratio=25 : 25 : 50% collector, 10 g / ton terpineol oil, stirred for 2 minutes, and carried out flotation separation; after 1 roughing, 2 fine selections, and 1 sweeping. Obtain 103.1 grams of inorganic powder containing 86.17% of electronic ceramics and 396.9 grams of organic powder containing 97.19% of glass fiber resin.

Embodiment 2

[0010] Example 2: After the waste circuit board is crushed and re-selected to recover the metal, take 500 grams of tailings, crush it to below 0.1 mm, add 1000 ml of water to make a slurry, add 0.05 grams of silicon defoamer water glass, and stir for 5 minutes ; Add 50 g / t octadecylamine : Mixed amine mass ratio=50 : 50% collector, 20 g / ton terpineol oil, stirred for 3 minutes, and carried out flotation separation; after 1 roughing, 3 fine selections, and 1 sweeping. Obtain 112.6 grams of inorganic powder containing 87.56% of electronic ceramics and 387.4 grams of organic powder containing 95.36% of glass fiber resin.

Embodiment 3

[0011] Embodiment 3: After the discarded circuit board is crushed and re-selected to recover the metal, 500 grams of tailings are taken, crushed to below 0.1 mm, and 1500 ml of water is added to make a slurry, then 0.075 grams of silicon defoamer water glass is added, and stirred for 8 minutes; Then add 300 g / t of dodecylamine, 5 g / t of terpineol oil, stir for 5 minutes, and carry out flotation separation; after 1 roughing, 5 fine selections, and 3 sweeps. Obtain 126.5 grams of inorganic powder containing 85.98% of electronic ceramics and 373.5 grams of organic powder containing 97.38% of glass fiber resin.

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

No PUM Login to View More

Abstract

The invention discloses a method for separating nonmetal material from waste circuit boards by flotation, which is characterized by comprising the following steps: grinding tailings, which are obtained after crushing waste circuit boards, reselection and recovery of metals by magnetic separation, to less than 0.1 millimeters, adding water according to a liquid-to-solid ratio between 2:1 to 3:1 tomake pulp, adding silicon defoaming agent according to a ratio of 100 to 200 grams per ton, and stirring for 5 to 8 minutes; and adding one, two or three of laurylamine, octadecylamine and mixed amine in an amount of 50 to 800 grams per ton as a collector and terpenic oil in an amount of 0 to 20 grams per ton, stirring for 2 to 5 minutes, and separating inorganic substances from organic substances by 1 time of coarse selection, 1 to 3 times of concentration and 1 to 3 times of scavenging. In the invention, the process flow is simple, the damage to the environment is small, the cost is low, the recycling rate of the waste circuit boards is improved, and the full-value pollution-free production of the waste circuit boards is realized.

Description

technical field [0001] The invention relates to the field of resource recovery, in particular to a method for recovering non-metallic materials from waste circuit boards. Background technique [0002] Waste circuit boards are electronic circuit boards embedded with various electronic components. Its composition is complex and there are many types of materials. It is difficult to achieve satisfactory recycling effects with simple processing. There are two types of non-metallic materials contained in waste circuit boards: one is organic composite materials, including plastics, resin glass fiber materials and resin-impregnated paper, etc.; the other is inorganic materials, mainly including metals and electronic ceramics. At present, the recycling technology of metal materials in waste circuit boards at home and abroad is relatively mature. After crushing and gravity separation, metallic copper and non-metallic tailings with a copper content of about 95% can be obtained. The co...

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): B03D1/01B03B1/00
Inventor 徐晓萍刘勇何晓娟刘牡丹刘珍珍尧应强
Owner 广东省资源综合利用研究所
Features
  • R&D
  • 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