CN1283376C - Method for recovering valuable resource from waste printed circuit board - Google Patents
Method for recovering valuable resource from waste printed circuit board Download PDFInfo
- Publication number
- CN1283376C CN1283376C CNB2003101034030A CN200310103403A CN1283376C CN 1283376 C CN1283376 C CN 1283376C CN B2003101034030 A CNB2003101034030 A CN B2003101034030A CN 200310103403 A CN200310103403 A CN 200310103403A CN 1283376 C CN1283376 C CN 1283376C
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- Prior art keywords
- circuit board
- printed circuit
- waste
- plastics
- copper
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- Expired - Fee Related
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 title claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000005188 flotation Methods 0.000 claims abstract description 7
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 7
- 239000003302 ferromagnetic material Substances 0.000 claims description 17
- 239000000047 product Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 5
- 201000002282 venous insufficiency Diseases 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 239000002283 diesel fuel Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims description 2
- 239000004088 foaming agent Substances 0.000 claims description 2
- 238000013517 stratification Methods 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 2
- 230000005291 magnetic effect Effects 0.000 abstract description 2
- 230000005294 ferromagnetic effect Effects 0.000 abstract 3
- 239000006148 magnetic separator Substances 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a method for reducing environment pollution and effectively recovering valuable resources in a waste and old printed circuit board, which comprises: coarse crushing and fine crushing are carried out to a waste and old printed circuit board in which electrical apparatus elements are dismantled; then, a dry magnetic separator is used for selecting ferromagnetic substances, a high frequency vibration air separator is used for separating metal substances and nonmetal substances, a wet magnetic separator is used for selecting magnetic substances, a flotation column is used for separating the materials of the selected ferromagnetic substances, and finally, the ferromagnetic substances, copper, alloy, plastics and resin are produced, and the goals of fully recovering all resources and reusing the resources are achieved.
Description
Technical field
The present invention relates to a kind of recovery method of electron wastes, particularly reclaim the method for valuable resource in the waste and old printed circuit board, belong to physical method.
Background technology
Waste and old printed circuit board is the pith of electronic product class solid waste, and its output rises year by year, present method of disposal generally be through gather, go-no-go, remove useful element after, adopt landfill, burn and handle.Contain a large amount of metals, plastics, resin etc. in the waste and old printed circuit board, should recycle fully.Because material is formed and the combination complexity, the monomer dissociation granularity is little, is not easy to realize separating.Nonmetal composition then mainly is the thermosetting plastics that contains special additive, disposes the comparison difficulty.The employing strong acid that has, highly basic reclaims noble metal wherein, causes serious environmental to pollute.After the process pulverizing and magnetic separation that has, adopt fiery smelting or chemical method to reclaim useful metal, the disposal cost height, and unavoidably produce secondary pollution.
Technical scheme
Purpose of the present invention just provides a kind of method that reduces environmental pollution and effectively reclaim valuable resource in the waste and old printed circuit board, it can dissociate broken printed circuit board effectively, produce ferromagnetic material, copper, alloy, and plastics and resin, reach the purpose that all resources all reclaim and reuse.
A kind of method that reclaims valuable resource in the waste and old printed circuit board, it is characterized in that the waste and old printed circuit board that will remove electric elements drops into the coarse crushing of double-roll type shear breaker, there is straight-tooth on the pair roller surface of this disintegrating machine, the straight-tooth of two rollers is engaged, occlusion portion has the edge of a knife, become 20mm wide rectangular to the material shearing-crushing that enters crusher chamber, pass through double-roll type shearing-crushing for the second time again, worn-out broken printed circuit board is become 20 * 20mm fragment.It is in small, broken bits below 1.2mm that fragment after the coarse crushing is sent into impact crusher, this moment the valuable constituent elementary solution in the waste and old printed circuit board from.The composition of material in small, broken bits mainly is density 1.5g/cm
3Following plastics, resin, density 5.0g/cm
3Above iron, copper, alloy.Adopt the following material in small, broken bits of dry separator sorting 1.2mm, select ferromagnetic material.The material of selecting behind the ferromagnetic material in small, broken bits is sent into dither pneumatic separation machine, sub-elect heavy product-copper, alloy and light product-plastics, resin according to the density difference.Dither pneumatic separation machine adopts the electromagnetic exciting mode, makes the sorting bed produce the vibration of high shake frequency, short arc.Lay the stainless steel woven screen on the bed surface, blast ascending air from sorting bed below, stainless steel mesh is three layers and interlocks sieve aperture 0.1mm.The comprehensive function of bed surface structure and direction of vibration makes material, and constantly upset is loose, helps by density stratification.Nonmetallic substance such as resin, plastics and metallicses such as copper, alloy two big class materials are collected respectively, used nonmetallic substance such as the metallics such as copper, alloy of acquisition＞0.25mm after the electromagnetic high frequency vibrating screen wet sieving of sieve aperture 0.25mm and plastics, resin and less than the screenings of 0.25mm.Screenings less than 0.25mm is adopted the wet separator sorting, select ferromagnetic material.The material of selecting behind the ferromagnetic material is carried out sorting with flotation column.Adopt diesel oil as trapping agent, fusel is as foaming agent, and floating thing is nonmetal things such as plastics and resin, and hypostasis is metal objects such as copper and alloy.Adopt filter to filter then and float thing and hypostasis, obtain nonmetal two products of finely-divided metal and particulate.The filter filtrate cycle is used.
The present invention adopts the streaming operation, and promptly by the coarse crushing of double-roll type shear breaker, impact crusher is in small, broken bits, and iron, copper, alloy, plastics, resin are dissociated; Adopt dry separator to select ferromagnetic material; Adopt dither pneumatic separation machine to isolate the material of different densities to the material of selecting behind the ferromagnetic material, use copper, alloy and plastics, the resin of the electromagnetic high frequency vibrating screen screening back acquisition＞0.25mm of sieve aperture 0.25mm and less than the screenings of 0.25mm; Use the flotation column sorting after adopting wet separator from undersize material, to select ferromagnetic material, adopt the filter dehydration respectively, obtain nonmetal thing such as plastics and resin and metal objects such as copper and alloy less than 0.25mm.
The present invention mainly adopts dry method that valuable resource is dissociated and separates resulting recovery resource purity height.The removal process energy resource consumption is low, and environmental pollution is little.Simultaneously, the present invention has prevented the pollution of waste and old printed circuit board to environment.
Description of drawings
Fig. 1 flow chart of the present invention.
Embodiment
Below in conjunction with the description of accompanying drawing, can further understand the present invention.
The waste and old printed circuit board 1 that to dismantle earlier among Fig. 1 behind the element carries out coarse crushing by double-roll type shear breaker 10, it is in small, broken bits below 1.2mm to re-use impact crusher 20, adopt dry-type magnetic extractor 30 to select ferromagnetic material 31, the material that 40 pairs in employing dither pneumatic separation machine is selected behind the ferromagnetic material carries out sorting.Sorted product is nonmetallic substance (resin, plastics) 41 and metallics (copper, alloy) 42.Sorted product is used nonmetallic substance 51 such as the plastics that obtain after electromagnetic high frequency vibrating screen 50 wet sievings of sieve aperture 0.25mm greater than 0.25mm, resin and metallicses such as copper, alloy 52 and less than mixture 53 (screenings) under the sieve of 0.25mm.Screenings enters wet separator 60 sortings, select ferromagnetic material 61, other material of selecting behind the ferromagnetic material is selected for use flotation column 70 sortings, adopt filter 80 to filter respectively and float thing 71 and hypostasis 72, obtain particulate nonmetallic substance (resin, plastics) 81 and finely-divided metal material (copper, alloy) 82, filtered fluid 83 recycles.Use this method to waste and old printed circuit board carry out coarse crushing in small, broken bits again after, 2.8～0.25mm grade iron content 2.94%, the copper 13.04% that dissociates, other metal 15.8%, plastics 10.61%, resin 57.6%.After selecting iron separately, carry out single stage separation, obtain resin content, and tenor such as copper is greater than 60% heavy product 37% greater than 81% light product 60% with dither pneumatic separation machine.As shown in table 1.
0.25-0.125mm particulate single hop flotation results is got the copper concentrate of grade 66.67% and resin, the plastics of grade 89.96%.
Resin and plastics can be used as filler and use, and copper can separate by smelting with metal.
In order to improve separation accuracy, can adopt multistage sorting flow process.The present invention adopts the streaming operation, and waste and old printed circuit board is carried out fragmentation dissociate, dry method and wet split, resulting recovery resource purity height can be used as the raw material of industry and uses, and the removal process energy resource consumption is low, and environmental pollution is little.Prevented the pollution of waste and old printed circuit board to environment.
The result of the broken thing of the table 1 dither pneumatic separation waste and old mainboard of machine sorting and printed circuit board (PCB) 2.8～0.25mm
| Raw material | Light product | Heavy product | |
| Resin | 59.35 | 81.81 | 23.26 |
| Plastics | 10.93 | 7.81 | 15.89 |
| Copper dissociates | 13.44 | 5.52 | 26.21 |
| Other metal | 16.28 | 4.86 | 34.64 |
| Add up to | 100 | 100 | 100 |
Claims (6)
1, a kind of method that reclaims valuable resource in the waste and old printed circuit board, it is characterized in that the waste and old printed circuit board that will remove electric elements drops into the coarse crushing of double-roll type shear breaker, it is in small, broken bits that fragment after the coarse crushing is sent into impact crusher, adopt dry separator to select ferromagnetic material then, the material of selecting behind the ferromagnetic material in small, broken bits is sent into dither pneumatic separation machine, sub-elect metallics, nonmetallic substance, to metallics and the nonmetallic substance wet sieving respectively that sub-elects, oversize is final products, adopt wet separator to select ferromagnetic material to screenings, with flotation column the material of selecting behind the ferromagnetic material is carried out sorting, the employing filter filters, and obtains the nonmetal and metal of particulate.
2, method according to claim 1, it is characterized in that described coarse crushing is that the material shearing-crushing that will enter double-roll type shear breaker crusher chamber becomes 20mm wide rectangular, pass through double-roll type shearing-crushing for the second time again, worn-out broken printed circuit board is become 20 * 20mm fragment.
3, method according to claim 1, it is characterized in that described in small, broken bits be that fragment after the coarse crushing is sent into impact crusher is in small, broken bits below 1.2mm, the valuable constituent elementary solution in this moment waste and old printed circuit board from.
4, method according to claim 1, it is characterized in that described dither pneumatic separation machine adopts the electromagnetic exciting mode, making the sorting bed produce height shakes frequently, the vibration of short arc, lay the stainless steel woven screen on the bed surface, blast ascending air from sorting bed below, stainless steel mesh is three layers and interlocks, sieve aperture 0.1mm, the comprehensive function of bed surface structure and direction of vibration makes material, and constantly upset is loose, help by density stratification, with resin, plastics nonmetallic substance and copper, alloying metal material two big class materials are collected respectively, this two big class material are used the copper of acquisition＞0.25mm after the electromagnetic high frequency vibrating screen wet sieving of sieve aperture 0.25mm respectively, alloying metal material and plastics, resin nonmetallic substance and less than the screenings of 0.25mm.
5, method according to claim 1 is characterized in that describedly with flotation column the material of selecting behind the ferromagnetic material being carried out sorting, adopts diesel oil as trapping agent, and fusel is as foaming agent, and floating thing is plastics and resin, and hypostasis is copper and alloy.
6, method according to claim 5 is characterized in that describedly floating thing and hypostasis and adopting filter to filter respectively, obtains nonmetal two products of finely-divided metal and particulate, and filter filtrate can be recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101034030A CN1283376C (en) | 2003-10-31 | 2003-10-31 | Method for recovering valuable resource from waste printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101034030A CN1283376C (en) | 2003-10-31 | 2003-10-31 | Method for recovering valuable resource from waste printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1611309A CN1611309A (en) | 2005-05-04 |
| CN1283376C true CN1283376C (en) | 2006-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101034030A Expired - Fee Related CN1283376C (en) | 2003-10-31 | 2003-10-31 | Method for recovering valuable resource from waste printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1283376C (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100540163C (en) * | 2005-11-17 | 2009-09-16 | 深圳市格林美高新技术股份有限公司 | The recovery technology of automobile and electronic waste metal |
| CN100444978C (en) * | 2006-01-09 | 2008-12-24 | 同济大学 | Multi-lateral-line solid fluidization pneumatic transfer separation device and method of printed circuit board |
| CN101758025B (en) * | 2009-12-31 | 2012-05-30 | 湖南万容科技有限公司 | Air flow vibration sorting machine |
| CN101831553B (en) | 2010-05-28 | 2012-06-06 | 北京科技大学 | Method for green recovery of waste circuit boards by cyanide-free full-wet whole set process |
| CN101885213B (en) * | 2010-07-28 | 2013-09-11 | 天津大学 | Method and device for separating metal and plastic mixture of waste electric wires |
| CN102172597B (en) * | 2010-12-24 | 2013-04-10 | 广州有色金属研究院 | Discarded circuit board full-value recycling method |
| CN102240606B (en) * | 2011-05-05 | 2013-06-19 | 广州有色金属研究院 | Method for separating nonmetal materials from waste circuit boards by flotation |
| CN102205573A (en) * | 2011-05-11 | 2011-10-05 | 扬州宁达贵金属有限公司 | Method for separating and purifying recycled plastics in waste electronic apparatus |
| CN102294344A (en) * | 2011-06-21 | 2011-12-28 | 清远市进田企业有限公司 | Printed circuit board material-crushing method and material-crushing distributing device |
| CN103506368B (en) * | 2012-06-29 | 2015-08-19 | 格林美股份有限公司 | Controlled fragmentation is separated method and the device of low-value materials and your material |
| CN104070050B (en) * | 2014-06-18 | 2016-01-20 | 华南理工大学 | High-pressure natural gas pressure energy is utilized to reclaim technique and the device of waste and old PCB |
| CN106076657B (en) * | 2016-06-16 | 2018-01-02 | 兰州理工大学 | The flotation separation method of copper in a kind of waste mobile phone circuit board |
| CN106435187B (en) * | 2016-08-30 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of processing method and system of thermal state metal pellet |
| CN106435190B (en) * | 2016-08-30 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of processing method and system of metallized pellet |
| CN106734058A (en) * | 2016-11-28 | 2017-05-31 | 安徽得盈再生资源回收有限公司 | Waste mobile phone wiring board valuable metal synthesized environmental protection separating technology |
| CN107442549B (en) * | 2017-06-23 | 2019-06-11 | 中国矿业大学 | The dry separation recovery process of valuable component in a kind of waste printed circuit board |
| CN107442264B (en) * | 2017-06-23 | 2019-04-05 | 中国矿业大学 | The wet split recovery process of valuable component in a kind of waste printed circuit board |
| CN109482335B (en) * | 2018-11-28 | 2021-02-09 | 中南大学 | Method for separating copper and tin in waste circuit board through flotation |
| CN112495999B (en) * | 2020-11-18 | 2023-04-18 | 华北理工大学 | Method for dissociating and recovering metal and nonmetal materials in electronic waste |
-
2003
- 2003-10-31 CN CNB2003101034030A patent/CN1283376C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1611309A (en) | 2005-05-04 |
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