CN102228897B - Copper metal recovery method - Google Patents
Copper metal recovery method Download PDFInfo
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- CN102228897B CN102228897B CN2011101180968A CN201110118096A CN102228897B CN 102228897 B CN102228897 B CN 102228897B CN 2011101180968 A CN2011101180968 A CN 2011101180968A CN 201110118096 A CN201110118096 A CN 201110118096A CN 102228897 B CN102228897 B CN 102228897B
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- Prior art keywords
- breakup
- frequency
- primary
- fragmentation
- secondary breakup
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- 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]
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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a copper metal recovery method, and especially relates to a method of recovering copper metal from a waste printed circuit board. A waste printed circuit board is transmitted by a frequency conversion conveying apparatus for a primary fragmentation, distributed by a frequency conversion fragmentation and material distributing apparatus for a secondary fragmentation to obtain a secondary fragmentation material; the secondary fragmentation material is mixed with water, screened by an automatic vibrating screen; and fine mixture particles obtained from the screening are distributed by a table material distributing apparatus, sorted by a sorting table, to prepare copper powder. The frequency conversion conveying apparatus employed in the invention can give full play to fragmentation production power of a crusher, and has a simple structure and high production efficiency. The frequency conversion fragmentation and material distributing apparatus and the table material distributing apparatus can realize uniform distribution of materials and raise production efficiency. A traditional artificial screening is substituted by the automatic vibrating screen to increase production efficiency substantially. An integral method is simple for realization, and has high production efficiency and strong practicality and popularization value.
Description
Technical field
The present invention relates to a kind of recovery method of copper metal, a kind of particularly method that reclaims the copper metal from discarded printed circuit boards belongs to waste and old resource recovery technology field.
Background technology
Printed circuit board (PCB) (PCB) is the basis of electronics industry, is indispensable important component part in each electronic product.Along with the develop rapidly of science and technology, information, electron trade, each electronic product update speed is accelerated, and has also produced a large amount of electron wastes thereupon in recent years, and the quantity of discarded printed circuit boards also increases year by year.Because the chief component material of discarded printed circuit boards is that the metal material such as copper, silver and the thermosetting plastics that contains special additive are main nonmetallic materials, therefore, with reclaiming and the rationally utilization that realizes the resources such as metal, the reduction environmental pollution is that the innoxious recovery research of the discarded printed circuit boards of purpose is one of present study hotspot.
The method that copper recovery in waste and old printed circuit board adopts mechanical-physical to process usually, first by Mechanical Crushing, metal component is separated with nonmetallic ingredient, then according to each constitutive property, carry out sorting as density, electrical etc., obtain respectively metal and nonmetal.This processing method, the shortcoming that ubiquity production efficiency is not high.The concrete reason following points:
At first, in the concrete crushing operation of waste and old printed circuit board, printed circuit board (PCB) through tape transport in disintegrating machine, because the broken speed of disintegrating machine is difficult to synchronize with the transporting velocity of conveyer belt, the transporting velocity that needs to adjust conveyer belt in actual production adapts to the broken speed of disintegrating machine.Conveyer belt of the prior art is motor-driven by deciding frequency, and its travelling speed is constant, and therefore, existing conveyer belt is inconvenient to regulate, and can have influence on production efficiency.
Secondly, after waste and old printed circuit board is transported to disintegrating machine, need to carry out again secondary pulverizing through elementary pulverizing, realize fully peeling off of molding powder and copper powder with further pulverizing.Because primary breakup is faster than the speed of secondary breakup, so the material after separate unit primary breaker primary breakup need to be distributed in many secondary breakup machines and carries out secondary breakup.In the prior art, and also there is no suitable feeding-distribution device, the material after separate unit primary breaker primary breakup can be distributed in many secondary breakup machines and carry out secondary breakup, cause brokenly the production efficiency of operation lower.
The 3rd, after waste and old printed circuit board was pulverized and to be completed, it formed the mixture of molding powder and copper powder, then the mixture of molding powder and copper powder was added water and screened, carrying out again than coarse granule of sifting out is in small, broken bits, and the thinner particle by screen cloth carries out further sorting.In the prior art, owing to there is no full automatic screening plant, screening adopts the mode of artificial screening to carry out usually, and the production efficiency of artificial screening is lower, the progress that impact is produced.
In addition, when carrying out sorting production, mainly to drive shaking table by drive unit to rock back and forth, the mixture that molding powder and copper powder add water formation flows on shaking table body bed surface, because the density of molding powder and copper powder is different, current, blend stop, shaking table shake match under, can realize separating of molding powder and copper powder.In the middle of prior art, the separate unit shaking table normally works independently, and therefore needs to extract mixture with an independent electric pump respectively and coordinates the separate unit shaking table, and its production capacity to electric pump is a kind of waste, and production efficiency also can not get improving.
Adopt the method for mechanical-physical to process waste and old printed circuit board, realize that be to improve each component organic efficiency, the prerequisite of enhancing productivity and key fully, efficiently separating of each component, and the deficiencies in the prior art have limited the development of copper recovery technology from discarded printed circuit boards to a certain extent.
Summary of the invention
The purpose of this invention is to provide a kind of method that reclaims the copper metal from waste and old printed circuit board, the method is by arranging frequency-changing conveying device, feeding-distribution device, full-automatic screening plant and shaking table material-separating device, realize the efficient separation of copper metal, make the regeneration better of copper metal, reach simultaneously and enhance productivity, the purpose that reduces production costs.
In order to address the above problem, the technical solution adopted in the present invention is as follows: waste and old printed circuit board is delivered to primary breaker through frequency-changing conveying device carries out primary breakup, get the primary breakup material; The primary breakup material carries out secondary breakup through variable-frequency breaking feeding-distribution device sub-material to secondary breakup machine again, gets the secondary breakup material; The secondary breakup material is added water, get mixture; Mixture must be than crude mixture particle and thinner compound particles through the screening of full-automatic vibration sieve; Deliver to the secondary breakup machine than the crude mixture particle further in small, broken bits, to separation shaking table, further sorting gets copper powder to thinner compound particles through the shaking table material-separating device sub-material.
The present invention is as follows with respect to the beneficial effect of prior art:
1, frequency-changing conveying device can adapt to the broken speed of disintegrating machine by the transporting velocity of adjusting conveyer belt, and both are mated, and gives full play to the broken production capacity of disintegrating machine, and production efficiency is high, and is practical, and simple in structure;
2, the variable-frequency breaking feeding-distribution device is set after the separate unit primary breaker, the material after separate unit primary breaker primary breakup can be distributed in many secondary breakup machines and carries out secondary breakup, realize the high-efficiency operation of producing;
3, printed circuit board (PCB) is pulverized completed the secondary breakup material that obtains and add water gained mixture and screen through full-automatic vibration, can substitute traditional artificial screening mode fully;
4, in the middle of prior art, the separate unit shaking table normally works independently, and by shaking table material-separating device is set, material can be assigned to many shaking tables and carries out sorting to enhance productivity.
The specific embodiment
Below by embodiment, the present invention is described in further details, these embodiment only are used for illustrating the present invention, do not limit the scope of the invention.
At first waste and old printed circuit board is delivered to the conveyer belt of a frequency-changing conveying device, described frequency-changing conveying device, include the conveying belt body, carry the active rotating shaft of belt body to be connected to drive motors, drive motors is connected to frequency-variable controller, is provided with reduction box between the active rotating shaft of drive motors and conveying belt body; The frequency-variable controller of regulating frequency-changing conveying device is controlled the rotating speed of drive motors, and the transporting velocity of conveyer belt is synchronizeed with the broken speed of primary breaker, and material is delivered to the primary breakup crusher machine, gets the primary breakup material.
Then connect a variable-frequency breaking feeding-distribution device after the separate unit primary breaker, described variable-frequency breaking feeding-distribution device includes hopper, an end at hopper is provided with feeding mouth, the bottom interval of hopper is provided with at least two discharging openings, be provided with rotatable the material in hopper is pushed to the screw propulsion rod of the other end from feeding mouth one end in hopper, one termination of screw propulsion rod has drive unit, and drive unit is made of motor and decelerator, is connected to frequency converter on described motor; Regulate the frequency converter of variable-frequency breaking feeding-distribution device, control material from the speed that each discharging opening of feeding-distribution device flows out, the material after this separate unit primary breaker primary breakup evenly is distributed in three secondary breakup machines carries out secondary breakup, get the secondary breakup material.
Again gained secondary breakup material is added water, get mixture, mixture is delivered to a full-automatic vibration sieve, described full-automatic vibration sieve includes support and circular screen frame, screen frame is arranged on support by three resilient legs, is provided with screen cloth in screen frame, and screen frame is connected to vibrator; Vibrator energising Vibration on Start-up sieve can't pass through flowing out than the sidepiece of coarse granule from screen cloth top vibration to the top sieve cover of screen cloth, must be than the crude mixture particle; Relatively fine particle by screen cloth falls from the screen cloth below, must thinner compound particles; Return to than the crude mixture particle that to deliver to the secondary breakup machine further in small, broken bits.
At last screening is obtained thinner compound particles and extract by an electric pump, deliver to the shaking table material-separating device charging aperture, after sub-material, material is evenly distributed to four separation shaking tables from 4 discharge hole for discharge of shaking table material-separating device, and further sorting gets copper powder.
As calculated, adopt this method can obtain approximately 82 %(weight of copper content) copper powder, the copper that wherein surpasses 95 % is recycled.
Claims (1)
1. the recovery method of a copper metal, be comprised of the following step: waste and old printed circuit board is delivered to primary breaker through frequency-changing conveying device carries out primary breakup, get the primary breakup material; The primary breakup material carries out secondary breakup through variable-frequency breaking feeding-distribution device sub-material to secondary breakup machine again, gets the secondary breakup material; The secondary breakup material is added water, get mixture; Mixture must be than crude mixture particle and thinner compound particles through the screening of full-automatic vibration sieve; Deliver to the secondary breakup machine than the crude mixture particle further in small, broken bits, to separation shaking table, further sorting gets copper powder to thinner compound particles through the shaking table material-separating device sub-material;
Specific as follows:
(1)First waste and old printed circuit board is delivered to the conveyer belt of a frequency-changing conveying device, described frequency-changing conveying device includes the conveying belt body, carries the active rotating shaft of belt body to be connected to drive motors, drive motors is connected to frequency-variable controller, is provided with reduction box between the active rotating shaft of drive motors and conveying belt body; The frequency-variable controller of regulating frequency-changing conveying device is controlled the rotating speed of drive motors, and the transporting velocity of conveyer belt is synchronizeed with the broken speed of primary breaker, and material is delivered to the primary breakup crusher machine, gets the primary breakup material;
(2)Then connect a variable-frequency breaking feeding-distribution device after the separate unit primary breaker, described variable-frequency breaking feeding-distribution device includes hopper, an end at hopper is provided with feeding mouth, the bottom interval of hopper is provided with at least two discharging openings, be provided with rotatable the material in hopper is pushed to the screw propulsion rod of the other end from feeding mouth one end in hopper, one termination of screw propulsion rod has drive unit, and drive unit is made of motor and decelerator, is connected to frequency converter on described motor; Regulate the frequency converter of variable-frequency breaking feeding-distribution device, control material from the speed that each discharging opening of feeding-distribution device flows out, the material after this separate unit primary breaker primary breakup evenly is distributed in three secondary breakup machines carries out secondary breakup, get the secondary breakup material;
(3)Again gained secondary breakup material is added water, get mixture, mixture is delivered to a full-automatic vibration sieve, described full-automatic vibration sieve includes support and circular screen frame, screen frame is arranged on support by three resilient legs, is provided with screen cloth in screen frame, and screen frame is connected to vibrator; Vibrator energising Vibration on Start-up sieve can't pass through flowing out than the sidepiece of coarse granule from screen cloth top vibration to the top sieve cover of screen cloth, must be than the crude mixture particle; Relatively fine particle by screen cloth falls from the screen cloth below, must thinner compound particles; Return to than the crude mixture particle that to deliver to the secondary breakup machine further in small, broken bits;
(4)At last screening is obtained thinner compound particles and extract by an electric pump, deliver to the shaking table material-separating device charging aperture, after sub-material, material is evenly distributed to four separation shaking tables from 4 discharge hole for discharge of shaking table material-separating device, and further sorting gets copper powder;
(5)As calculated, adopt this method can obtain approximately 82 %(weight of copper content) copper powder, the copper that wherein surpasses 95 % is recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101180968A CN102228897B (en) | 2011-05-09 | 2011-05-09 | Copper metal recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101180968A CN102228897B (en) | 2011-05-09 | 2011-05-09 | Copper metal recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102228897A CN102228897A (en) | 2011-11-02 |
| CN102228897B true CN102228897B (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101180968A Expired - Fee Related CN102228897B (en) | 2011-05-09 | 2011-05-09 | Copper metal recovery method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101466887B1 (en) * | 2013-06-07 | 2014-12-04 | 한양대학교 산학협력단 | Apparatus for Metal Liberation in Printed Circuit Boards(PCBs) |
| CN104947155B (en) * | 2015-05-28 | 2017-04-26 | 中南大学 | Process for recovering copper from waste circuit board to prepare high purity and high strength copper foil based on electrochemical method |
| CN105256142B (en) * | 2015-11-05 | 2017-12-05 | 清远市进田企业有限公司 | The recovery process of copper metal in a kind of waste and old circuit board |
| CN110561653A (en) * | 2019-08-17 | 2019-12-13 | 临武县华湘再生资源回收有限公司 | waste plastic covered wire recycling and processing equipment |
| TWI796107B (en) * | 2022-01-20 | 2023-03-11 | 菖鼎科技股份有限公司 | Recycling methods of waste printed circuit boards |
| CN114951216A (en) * | 2022-05-12 | 2022-08-30 | 清远市金运再生资源有限公司 | Wet recovery system and method for metal in waste circuit board |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02218486A (en) * | 1989-02-21 | 1990-08-31 | Sanko:Kk | Recovery of metal copper from cutting refuse of printed circuit board |
| JP3664586B2 (en) * | 1998-06-25 | 2005-06-29 | 同和鉱業株式会社 | Method and apparatus for metal recovery from solid waste |
| JP2000104126A (en) * | 1998-09-30 | 2000-04-11 | Shin Meiwa Ind Co Ltd | Recovering method of valuable metals containing copper from waste printed circuit board and system for recovery of valuable metal containing copper and separation of slag component from waste printed circuit board |
| JP2002233856A (en) * | 2001-02-06 | 2002-08-20 | Narifumi Uemura | Method and apparatus for separating metals from printed circuit board |
| CN1611308A (en) * | 2003-10-31 | 2005-05-04 | 登峰机械工业有限公司 | Copper foil recovery method for circuit board |
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- 2011-05-09 CN CN2011101180968A patent/CN102228897B/en not_active Expired - Fee Related
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| CN102228897A (en) | 2011-11-02 |
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