CN101274329A - Flash smelting and electric stove clean techniques for processing waste circuit board - Google Patents
Flash smelting and electric stove clean techniques for processing waste circuit board Download PDFInfo
- Publication number
- CN101274329A CN101274329A CNA2008100613467A CN200810061346A CN101274329A CN 101274329 A CN101274329 A CN 101274329A CN A2008100613467 A CNA2008100613467 A CN A2008100613467A CN 200810061346 A CN200810061346 A CN 200810061346A CN 101274329 A CN101274329 A CN 101274329A
- Authority
- CN
- China
- Prior art keywords
- slag
- metal
- flash smelting
- electric stove
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 title abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000002912 waste gas Substances 0.000 claims abstract description 8
- 238000010790 dilution Methods 0.000 claims description 17
- 239000012895 dilution Substances 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical class [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 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
- Y02W30/20—Waste processing or separation
-
- 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)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a flash smelting and an electric stove depletion technique for processing spent circuit boards which aims at solving the technical problem of providing a flash smelting and electric stove depletion technique that does not need to implement sorting and add other fuels. The technical proposal to solve the problem comprises the following steps: (1) the spent circuit boards are mechanically smashed until the granularity is below 3mm; (2) the obtained powder lot is directly sprayed into a hearth box of a flash smelting stove under wind force; (3) liquid metal, melting slag and waste gas are discharged separately from different outlets; (4) the slag is further depleted, metal liquid is discharged from a metal liquid outlet at the bottom of the stove, and the depleted slag is discharged outside the electric stove from a slag outlet; (5) the liquid metal is poured into a nubby metal, slag water is hardened to granular slag, and cooled waste gas is exhausted by a draught fan through a chimney after the acid stripping with an acid stripping tower and the dust abatement with a bag-typed dust collector are finished. The flash smelting and electric stove depletion technique can be used for the recycling of the spent circuit boards.
Description
Technical field
The present invention relates to a kind of flash smelting and electric dilution technology of handling waste printed circuit board.Be used for recycling to waste printed circuit board.
Background technology
Along with the development of electronics industry, the quantity of waste printed circuit board is increasing, and wiring board mainly is made up of materials such as non-ferrous metal, noble metal, epoxy resin, glass fibres, and how effectively recycling is related to resource regeneration and environmental protection.
Handle at present both at home and abroad waste printed circuit board and mainly take physical separation technology, its technical process is: earlier waste printed circuit board is manually disassembled, mechanical crushing, physical separation, produced metal dust and resinous glass fibre powder.There is following problem in this processing method, and metal dust generally contains the 10-20% toner, still can produce dusty gas during melting again, and resinous glass fibre powder is difficult to handle, and generally makes landfill disposal, and metal recovery rate only reaches 90-93%.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of sorting that do not need is provided, do not need to add other fuel, both saved the melting cost, can solve flash smelting and electric dilution technology that the plexiglas fiber dust is difficult to handle the processing waste printed circuit board of a difficult problem again, metal recovery rate should be able to arrive more than 99% simultaneously.
The technical solution adopted in the present invention is: a kind of flash smelting and electric dilution technology of handling waste printed circuit board is characterized in that processing step is as follows:
1) waste printed circuit board is manually disassembled, removed available components and parts, remaining empty wiring board Mechanical Crushing is become several centimetres of bulks, be crushed to granularity below 3mm through pulverizer then;
2) powder of step 1) gained does not need classification, does not need sorting, directly sprays into flash stove burner hearth by nozzle with cyclone mode by wind-force;
3) be smelted into liquid metal and partly regularly given off by the delivery port of furnace bottom, the slag of molten is flowed in the slag cleaning furnace by the slag notch on top, and waste gas enters quench tower by the pipeline at top;
4) conductive electrode is inserted the slag of inflow slag cleaning furnace to its further heating, make metal sedimentation in the slag, produce a part of liquid metal again after handling through dilution, give off from the molten metal outlet of furnace bottom, and the slag after the dilution is discharged outside the electric furnace from the slag outlet;
5) liquid metal pours into the reguline metal, and the slag of water-granulating slag shape, cooled waste gas pass through after extracting tower depickling, the sack cleaner dedusting by air-introduced machine through smoke stack emission again.
The flash stove is a kind of smelting furnace of strengthening production, has the granular material of huge surface area, fully contacts with oxygen in stove, at high temperature, finishes the controllable oxidization reaction of sulfide with high speed.A large amount of heat is emitted in reaction, supplies with fusion process, uses the high material of sulfur-bearing, might realize autogenous smelting.The flash stove and accessory has productivity ratio height, low, the high characteristics of sulfur dioxide in flue gas (SO2) concentration of energy consumption.The flash stove is mainly used in copper, the melting of nickel sulfides concentrate.Flash smelting is the huge active surface that makes full use of the fine grinding material, the method for smelting of strengthening smelting course of reaction.Flash smelting desulfurization degree height helps the recovery of sulfur dioxide, and goes into the oxygen amount of stove by control, at the desulfurization degree of inner control fusion process in a big way.It is more that the major defect of flash smelting is that slag contains main metal, must handle through dilution, reclaimed.
Owing to still containing little metal in the slag that comes out from the flash stove, so need dilution to handle, slag flows in the slag cleaning furnace, by the conductive electrode that inserts slag slag is heated, and makes the interior metal sedimentation of slag, reaches the dilution purpose.
The invention has the beneficial effects as follows: the present invention adopts flash smelting technology, pulverize the back powder and do not need sorting, directly carry in the smelting furnace by wind-force, because resin combustibility is good, particle is thin, enters burning rapidly in the high-temperature burner hearth, ignition temperature can reach more than 1500 ℃, metallic particles and the fusing of glass fibre powder form the liquid metal and the slag that can flow, and slag flows into slag cleaning furnace, further reclaims metal in the dreg.In addition, the present invention has made full use of the calory burning of resin in the waste printed circuit board, does not need to add other fuel, has both saved the melting cost, has solved the reluctant problem of plexiglas fiber dust again, and metal recovery rate can reach more than 99% simultaneously.
Description of drawings
Fig. 1 is technological process of the present invention and device structure schematic diagram.
The specific embodiment
As shown in Figure 1, present embodiment is handled the flash smelting and the electric dilution technology of waste printed circuit board, and its step is as follows:
1) waste printed circuit board is manually disassembled, removed available electronic devices and components and iron, aluminium class material, remaining empty wiring board Mechanical Crushing is become several centimetres of bulks, be crushed to granularity below 3mm through pulverizer then;
2) powder of step 1) gained does not need classification, do not need sorting, directly spray into flash stove 1 burner hearth by nozzle 1-1 with cyclone mode by wind-force, because temperature is up to more than 1500 ℃ in the burner hearth, the heat that the rapid burning of toner is produced is with the metal and the fusing of glass fibre powder that spray into;
3) be smelted into liquid metal and partly regularly given off by the delivery port 1-2 of furnace bottom, the slag of molten is flowed in the slag cleaning furnace 2 by the slag notch 1-3 on top, and waste gas enters quench tower 3 by the pipeline at top;
4) slag that enters slag cleaning furnace 2 being carried out dilution handles, its method is conductive electrode to be inserted in the slag slag is heated, make metal sedimentation in the slag, reach the dilution purpose, through producing a part of liquid metal again after the dilution processing, give off from the molten metal outlet 2-1 of furnace bottom, and the slag after the dilution is discharged outside the electric furnace from slag outlet 2-2;
5) liquid metal pours into the reguline metal, and the slag of water-granulating slag shape, cooled waste gas are again through being discharged through chimney 7 by air-introduced machine 6 after extracting tower 4 depicklings, sack cleaner 5 dedustings.
Claims (1)
1, a kind of flash smelting and electric dilution technology of handling waste printed circuit board is characterized in that processing step is as follows:
1) waste printed circuit board is manually disassembled, removed available components and parts, remaining empty wiring board Mechanical Crushing is become several centimetres of bulks, be crushed to granularity below 3mm through pulverizer then;
2) powder of step 1) gained does not need classification, does not need sorting, directly sprays into flash stove (1) burner hearth by nozzle (1-1) with cyclone mode by wind-force;
3) be smelted into liquid metal and partly regularly given off by the delivery port (1-2) of furnace bottom, the slag of molten is flowed in the slag cleaning furnace (2) by the slag notch (1-3) on top, and waste gas enters quench tower (3) by the pipeline at top;
4) conductive electrode is inserted the slag of inflow slag cleaning furnace (2) to its further heating, make metal sedimentation in the slag, produce a part of liquid metal again after handling through dilution, give off from the molten metal outlet (2-1) of furnace bottom, and the slag after the dilution is outside electric furnace is discharged in slag outlet (2-2);
5) liquid metal pours into the reguline metal, and the slag of water-granulating slag shape, cooled waste gas are discharged through chimney (7) by air-introduced machine (6) after passing through extracting tower (4) depickling, sack cleaner (5) dedusting again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100613467A CN101274329B (en) | 2008-04-23 | 2008-04-23 | Flash smelting and electric stove clean techniques for processing waste circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100613467A CN101274329B (en) | 2008-04-23 | 2008-04-23 | Flash smelting and electric stove clean techniques for processing waste circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274329A true CN101274329A (en) | 2008-10-01 |
| CN101274329B CN101274329B (en) | 2010-09-08 |
Family
ID=39994424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100613467A Expired - Fee Related CN101274329B (en) | 2008-04-23 | 2008-04-23 | Flash smelting and electric stove clean techniques for processing waste circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101274329B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768670A (en) * | 2010-02-25 | 2010-07-07 | 北京矿冶研究总院 | Method for smelting lead-containing material |
| CN102380501A (en) * | 2011-07-13 | 2012-03-21 | 浙江环益科技有限公司 | U-shaped high-temperature waste recycling furnace |
| CN104421943A (en) * | 2013-08-26 | 2015-03-18 | 杭州恒超电子科技有限公司 | Environmental friendly disposing technology and system thereof for waste electric motor and other waste containing organic matters |
| CN107058747A (en) * | 2017-05-03 | 2017-08-18 | 中南大学 | The method of oxygen-enriched top blowing copper weld pool collocation processing waste printed circuit board |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1229008A (en) * | 1998-03-12 | 1999-09-22 | 王文彬 | Method for retrieving valuable material from printed circuit board |
| CN100531943C (en) * | 2006-09-16 | 2009-08-26 | 大连理工大学 | Electronic refuse treatment method |
| CN100447263C (en) * | 2007-01-19 | 2008-12-31 | 王威平 | Harmless processing system and process for copper powder containing organism and glass fiber |
| CN201010681Y (en) * | 2007-02-14 | 2008-01-23 | 张�诚 | Equipment for abstracting metal from waste circuit board |
| CN100498070C (en) * | 2007-05-18 | 2009-06-10 | 杭州大洲物资再生利用有限公司 | Blast electroslag furnace dedicated for treating electronic waste |
-
2008
- 2008-04-23 CN CN2008100613467A patent/CN101274329B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768670A (en) * | 2010-02-25 | 2010-07-07 | 北京矿冶研究总院 | Method for smelting lead-containing material |
| CN102380501A (en) * | 2011-07-13 | 2012-03-21 | 浙江环益科技有限公司 | U-shaped high-temperature waste recycling furnace |
| CN102380501B (en) * | 2011-07-13 | 2014-01-29 | 浙江环益科技有限公司 | U-shaped high-temperature waste recycling furnace |
| CN104421943A (en) * | 2013-08-26 | 2015-03-18 | 杭州恒超电子科技有限公司 | Environmental friendly disposing technology and system thereof for waste electric motor and other waste containing organic matters |
| CN107058747A (en) * | 2017-05-03 | 2017-08-18 | 中南大学 | The method of oxygen-enriched top blowing copper weld pool collocation processing waste printed circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101274329B (en) | 2010-09-08 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: WANG WEIPING Free format text: FORMER OWNER: HANGZHOU DAZHOU GOODS AND MATERIALS REPRODUCTION USE CO., LTD. Effective date: 20091106 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20091106 Address after: Hangzhou City, Zhejiang Province Ya Xiang Ding Shangcheng District No. 23 Room 202 post encoding: 310002 Applicant after: Wang Weiping Address before: The postcode of canal bridge, Tangqi Industrial Park, Yuhang District, Zhejiang, Hangzhou Province, China: 311106 Applicant before: Dazhou Material Regeneration and Utilization Co., Ltd., Hangzhou |
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Effective date of registration: 20160119 Address after: Hangzhou City, Zhejiang Province, 310000 Ginza room 1101 Jianggan District Rd Patentee after: Zhejiang Huanyi Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310002 Ya Xiang Ding Shangcheng District No. 23 Room 202 Patentee before: Wang Weiping |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20180423 |