CN109852810A - A kind of method for recovering precious metals of waste printed circuit board powder - Google Patents
A kind of method for recovering precious metals of waste printed circuit board powder Download PDFInfo
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- CN109852810A CN109852810A CN201910294118.2A CN201910294118A CN109852810A CN 109852810 A CN109852810 A CN 109852810A CN 201910294118 A CN201910294118 A CN 201910294118A CN 109852810 A CN109852810 A CN 109852810A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a kind of method for recovering precious metals for waste printed circuit board powder.Waste printed circuit board is crushed, the mixed-powder of particle diameter consistent baseplate material and noble metal is obtained；According to the belt speed of conveyer belt and ultrasonic transducer vibration amplitude using the displacement between following formula setting waste printed circuit board powder particle and baseplate material particle；Mixed-powder is fallen and moves to outlet side transport from input side on a moving belt, conveyer belt side is equipped with ultrasonic transducer, mixed-powder of the ultrasonic transducer on conveyer belt issues acoustic radiation force, setting meets the work of the conveyor belt speed of condition and the operation of ultrasonic transducer vibration amplitude control conveyer belt and ultrasonic transducer, and baseplate material is mutually separated with noble metal；And setting controls different parameters and repeats the multiple screening process of step progress.The present invention realizes the screening of noble metal in waste printed circuit board powder, effectively improves the noble metal rate of recovery of waste printed circuit board powder.
Description
Technical field
The present invention designs a kind of metal recovery processing method of environmental technology field, specifically a kind of waste printed circuit board powder
In method for recovering precious metals.
Background technique
In recent years, electronic product yield is huge, at the same time, there is a large amount of electronic product disposed waste every year, wherein
It is no lack of the noble metals component such as tin, copper, it is recycled with important value.
Chinese publication CN103320618A (publication date 2013.09.25) proposes a kind of by physical separation and life
Object leaches the method that the method combined recycles noble metal from waste printed circuit board, in broken waste printed circuit board fragment and height
After pressing electrostatic separation, substep leaching is carried out to metal mixed particle using the hydrogen cyanide that pseudomonad secrets out of, is successively obtained general
The single ion solution of logical metal and noble metal, then displaced noble metal, the common metal in solution respectively by replacing reaction
Come.This method is easy to operate, but microorganism culture environment requires height, and valuable metal leaching efficiency is low.Chinese publication
CN200910082443.9 (publication date 2010.10.20) proposes a kind of Separation of Tin, choosing of lead and copper from waste printed circuit board
Selecting property leaching method.With hydrochloric acid and copper chloride solution Selectively leaching tin and lead, it to be used for Separation of Tin and lead from copper.However, should
The chloride ion of method middle and high concentration has very strong corrosivity to equipment, and requires the quality of materials of equipment higher.It is Chinese public
It opens patent CN101423898 (publication date 2009.05.06) and proposes first to put waste printed circuit board and heated in oil bath with molten
Change solder, the waste printed circuit board then melted is effectively separated with waste printed circuit board by centrifugal machine, passes through Vacuum Heat
Solution separation organic matter and other metals.However, this method decomposes certain organic matters when tin is pyrolyzed and generates polluted gas.It is public
It opens patent CN101787547A (publication date 2010.07.28) and proposes a kind of side from waste printed circuit board recycling valuable metal
Method.Pay close attention to copper, the recycling of nickel and noble metal.Lead, tin, antimony and aluminium are separated by the fusing agent being made of NaOH-NaNO3,
But the amount for the fusing agent being added is small, and treatment effect is unobvious.
In conclusion existing use physical separation and biological method low efficiency, to environmental requirement height, using related to chemistry
The problem of method can generate waste liquid and exhaust gas, not only influence operator's health but also adjoint environmental pollution.
Summary of the invention
In order to solve the problems, such as background technique, for waste printed circuit board powder chemistry recovery method pollution environment
Problem, the invention proposes the method for recovering precious metals of new waste printed circuit board powder, pass through control waste printed circuit board powder
Movement velocity and the size of ultrasonic transducer amplitude control the displacement of baseplate material in waste printed circuit board powder, realize discarded electricity
The screening of noble metal in the plate powder of road, effectively improves the noble metal rate of recovery of waste printed circuit board powder.
The present invention uses following steps using following technical scheme:
Step 1) crushes waste printed circuit board, obtains the mixed-powder of particle diameter consistent baseplate material and noble metal；
Step 2) solves following formula according to the belt speed v and ultrasonic transducer vibration amplitude A of conveyer belt, and setting is discarded
Displacement S between circuit board powder particle and baseplate material particle；
In formula, R is powder particle radius, ρ0For the Static Density of air, ρsFor baseplate material grain density, A is sound source vibration
Dynamic amplitude, f are sound source vibration frequency, c0For the velocity of sound of air, y is that for particle at a distance from amplitude face, L is that energy converter is wide in sound wave
Degree；ayIndicate the second dervative of distance y, as acceleration, y (t) indicates the displacement of t time；
The baseplate material particle displacement S can pass through the belt speed v and ultrasonic transducer vibration amplitude A tune of conveyer belt
Section.
Mixed-powder is fallen and moves to outlet side transport from input side on a moving belt by step 3), and conveyer belt side is equipped with super
Acoustic wave transducer, mixed-powder of the ultrasonic transducer on conveyer belt issue acoustic radiation force, and setting meets the biography of S=SL condition
Tape speed v and ultrasonic transducer vibration amplitude A is sent to control the operation of conveyer belt and the work of ultrasonic transducer, SL indicates base
The displacement threshold value that plate material particle and noble metal granule separate, since baseplate material is different with the density of noble metal, density is bigger
Noble metal granule generate displacement and deviate, baseplate material mutually separates with noble metal；
The belt speed v and ultrasonic transducer vibration amplitude A that step 4) setting controls different conveyer belt repeat step 3) into
The multiple screening process of row.The noble metal powder particle in waste printed circuit board powder can be efficiently separated out in this way, improve noble metal
Purity.
The step 4) specifically:
Step 4.1): a part of powdered product close to ultrasonic transducer is taken to reappose transmission after sieving for the first time
It takes and moves to outlet side transport from input side again, sieved next time；
Step 4.2): belt speed v and the ultrasonic transducer vibration of conveyer belt are set at second of screening in the following ways
Amplitude A: the displacement between setting waste printed circuit board powder particle and baseplate material particle is SL2=λ SL1, following public affairs are solved by counter
Formula obtains belt speed v2With ultrasonic transducer vibration amplitude A2；
Wherein, SL1Indicate the displacement threshold value SL, SL when sieving for the first time2Displacement threshold value SL when indicating to sieve for second；λ
To be displaced attenuation coefficient, for the number greater than 0 less than 1, the error-sifting rate for reducing new shift value S when can reduce screening again；
Then with belt speed v2With ultrasonic transducer vibration amplitude A2Control the operation of conveyer belt and the work of ultrasonic transducer
Make, takes a part of powdered product close to ultrasonic transducer to reappose after screening and moved to again from input side on conveyer belt
Outlet side transport is sieved next time, and the noble metal of high-purity is obtained after carrying out repeatedly.
The noble metal is gold, silver, palladium, copper etc. and its alloy, with excellent electric conductivity and flexibility.
Thus the present invention can by it is multiple control waste printed circuit board powder movement velocitys and ultrasonic transducer amplitude it is big
The small displacement to control baseplate material in waste printed circuit board powder realizes the screening of noble metal in waste printed circuit board powder, effectively
Improve the noble metal rate of recovery of waste printed circuit board powder.
The invention has the benefit that
1, the present invention utilizes sound by the physical property difference in waste printed circuit board powder between noble metal and baseplate material
Radiant force is separated, and traditional chemical routes are compared, and without preparing complicated and harmful chemical agent, can pass through multiplicating
Separation further increases precious metal separation purity.
2, waste printed circuit board powder method for recovering precious metals of the invention is a kind of clean method of green.Nothing has poison gas
Body generates, and without chemical agent is discarded, separation process is low to environmental requirement, and noise is small, is safe from harm to personnel and environment.
Detailed description of the invention
In order to which the present invention is further explained, described content, with reference to the accompanying drawing makees a specific embodiment of the invention
Further details of explanation.It should be appreciated that these attached drawings are only used as typical case, and it is not to be taken as to the scope of the present invention
It limits.
Fig. 1 is the noble metal removal process schematic diagram of the method for the present invention.
Fig. 2 is acoustic radiation force distribution schematic diagram in standing-wave sound field.
Fig. 3 is baseplate material particle displacement and transmission tape speed and ultrasonic magnitude relation figure.
Fig. 4 is three dimensional structure diagram of the invention.
Fig. 5 is separator rack construction cross-sectional view.
Fig. 6 is adjusting bracket structural schematic diagram.
Fig. 7 is driving motor supporting structure schematic diagram.
Fig. 8 is driving wheel structure cross-sectional view.
Fig. 9 is drive wheel bracket structural schematic diagram.
Figure 10 is drive shaft schematic diagram.
Figure 11 is tension wheel structure cross-sectional view.
Figure 12 is tensioning supporting structure schematic diagram.
Figure 13 is tension wheel shaft schematic diagram.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for the content made known.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications and alterations are carried out under spirit of the invention.
As shown in figure 4, the present invention, which is embodied, uses following device, including separator rack 1, ultrasonic module, material
Bucket 7 and conveyer belt 10；Two sides in separator rack 1 are symmetrically installed there are two ultrasonic module, two ultrasonic modules it
Between be disposed with conveyer belt 10, hopper 7 is equipped with above conveyer belt 10, hopper 7 is placed with waste printed circuit board comminuting matter；Each ultrasound
Wave component includes adjusting bracket 2 and ultrasonic generator 3, and adjusting bracket 2 is fixed in separator rack 1, adjusts branch
Ultrasonic generator 3 is mounted on frame 2；Be equipped in separator rack 1 driving motor 4, driving wheel 8, tensioning wheel 12,
Drive wheel bracket 9 and tensioning bracket 11, driving motor 4 are fixed in separator rack 1 by driving motor bracket 5, are driven
Motor 4 is connected by shaft coupling 6 with driving wheel 8, and driving wheel 8 is mounted in separator rack 1 by drive wheel bracket 9,
Bearing up pulley 12 is mounted in separator rack 1 by being tensioned bracket 11, and 10 sets of conveyer belt on driving wheel 8 and tensioning wheel 12.
Two ultrasonic generators 3 are mounted on 10 two sides of conveyer belt, two ultrasounds by the way that respective adjusting bracket 2 is opposed
Wave generating device 3 is popped one's head in underface that is opposed and being located at 10 upper surface of conveyer belt, and the waste printed circuit board comminuting matter in hopper 7 is fallen
Under to transporting on conveyer belt 10, the waste printed circuit board comminuting matter on conveyer belt 10 is added by two ultrasonic generators 3
It carries acoustic radiation force and realizes separation.
As shown in figure 5, being 1 structure sectional view of separator rack of the present invention, there are two bar shapeds in separator rack 1
Slot, for adjusting the position of adjusting bracket 2, inside is equipped with gusset, for reinforcing separator housing rigidity.
As shown in fig. 6, adjusting bracket 2 includes adjusting bracket upper fixture block 2-2, adjusting bracket lower fixture block 2-3 and adjusting bracket
Fixed plate 2-5；The adjusting bracket bottom surface upper fixture block 2-2 is equipped with semicircle groove, and it is recessed that the adjusting bracket top surface lower fixture block 2-3 is equipped with semicircle
The semicircle groove of slot, adjusting bracket upper fixture block 2-2 and adjusting bracket lower fixture block 2-3 are connected to each other to be formed for installing mounting ultrasonic
The circular groove of 3 portions of generating device passes through interior hexagonal spiral shell between adjusting bracket upper fixture block 2-2 and adjusting bracket lower fixture block 2-3
It is affixed to follow closely 2-1, so that ultrasonic generator 3 is on circular groove；Adjusting bracket fixed plate 2-5 is mounted on separator machine
1 lower section of frame, adjusting bracket lower fixture block 2-3 are mounted on 1 top of separator rack, offer two in separator rack 1 and put down
Capable strip groove is respectively arranged with bolt 2-4 in each strip groove, and bolt 2-4 passes through strip groove and both ends are separately connected adjusting bracket
Fixed plate 2-5 and adjusting bracket lower fixture block 2-3 simultaneously tightens fixation with nut 2-6, and adjusting bracket lower fixture block 2-3 and adjusting bracket are solid
Fixed board 2-5 is assemblied in separator rack 1 by bolt 2-4 and nut 2-6；Unscrew adjustment adjusting bracket by nut 2-6
Installation site of the lower fixture block 2-3 in two strip grooves, so adjust ultrasonic generator 3 between conveyer belt 10 at a distance from,
Adjust the screening effect of multicomponent comminuting matter.Scale is indicated in strip groove in separator rack 1, specific implementation passes through sight
Scale is examined to be adjusted.
As shown in fig. 7, being driving motor bracket 9 of the present invention, right side is fixed on separator rack 1 by bolt and nut
On, left side is screw hole, and driving motor 4 is mounted above by soket head cap screw.
As shown in figure 8, driving wheel 8 of the present invention.Wheel hub is equipped with keyway, is connect by key with drive shaft 9-3, for passing
Pass movement.
As shown in Figure 9, Figure 10, drive wheel bracket 9 includes drive shaft 9-3, two drive wheel bracket plate 9-4；Driving wheel
Supporting plate 9-4 is L-shaped, and the horizontal bottom of drive wheel bracket plate 9-4L shape is assemblied in separator by nut 9-1 and bolt 9-2
In rack 1, support sleeve is equipped with drive shaft 9-3, drive shaft 9-3 between the vertical side of two drive wheel bracket plate 9-4L shapes
For multi-diameter shaft, as shown in Figure 10, the vertical side of two drive wheel bracket plate 9-4L shapes opens up circular hole, drive shaft 9-3 branch
Support set is between the circular hole of two drive wheel bracket plate 9-4, and driving wheel 8 is by key coaxial package on drive shaft 9-3；
As shown in figure 11, tensioning wheel 12 includes tensioning wheel body 12-1, bearing 12-2, circlip for hole 12-3, tensioning wheel
Body 12-1 offers central through hole, installation bearing 12-2 in center in central through hole, the central through hole inner wall at the both ends bearing 12-2
Two annular grooves are offered, circlip for hole 12-3, which is inlaid in annular groove, realizes bearing 12-2 axial restraint.
As shown in Figure 12 and Figure 13, tensioning bracket 11 includes tension wheel shaft 11-1 and two tension pulley support plate 11-3；Tensioning
Wheel support plate 11-3 is L-shaped, and the horizontal bottom of tension pulley support plate 11-3L shape is assemblied in point by bolt 11-4 and nut 11-5
From in device frame 1, the vertical side of two tension pulley support plate 11-3L shapes opens up kidney slot, the length direction of kidney slot
Be parallel to the conveying direction of conveyer belt 10, tension wheel shaft 11-1 support sleeve mounted in two tension pulley support plate 11-3 kidney slot it
Between, tensioning wheel 12 is by key coaxial package on tension wheel shaft 11-1；The vertical side of one of tension pulley support plate 11-3L shape
Portion is fixed with lug, and the one end soket head cap screw 11-2, which screws, to be connected on lug, and the other end resists tension wheel shaft 11-1, by interior
Hex screw 11-2 adjusts precession and screws out position of the adjustment tension wheel shaft 11-1 in kidney-shaped hole slot, adjusts tension wheel shaft 11-1
Wheelbase between driving wheel 8, i.e. adjustment the distance between driving wheel 8 and tensioning wheel 12, realize the tensioning of conveyer belt 10.
As shown in Figure 1, comminuting matter includes the mixing pellet that diameter is identical but quality is different, pellet is mixed in conveyer belt
Outlet side is moved to from input side under the drive of conveyer belt 10, by way of super along the strip distribution for being parallel to conveying direction on 10
By acoustic radiation force when sound wave generating device 3, the different pellet of quality, which generates displacement, to be deviateed, and it is inclined to be directed away from acoustic radiation force source
It moves, is distributed on the strip of different location, realize the pellet separation of different quality in mixing pellet.
Specific step is as follows for the embodiment implemented according to complete method of the present invention:
Step 1 crushes waste printed circuit board, obtains particle diameter almost the same baseplate material and noble metal powder, powder
Last particle diameter control is in 100 microns.
Step 2, belt speed v and ultrasonic transducer vibration amplitude A by conveyer belt calculate waste printed circuit board powder particle
Opposite average potential Uy, acoustic radiation force FyWith baseplate material particle displacement S.
2.1) opposite average potential U is calculatedy
As shown in Figure 1, noble metal removal process schematic diagram of the invention, conveyer belt are vertical with two ultrasonic transducer lines
It arranges, is standing-wave sound field between two ultrasonic transducers.As coordinate original when having just enter into length using hybrid particles as the transducer area of L
Point o, establishes xoy rectangular coordinate system, and transmission belt is moved along the x-axis direction with speed v.It is expensive after hybrid particles leave transducer area
Metal forms different displacements from baseplate material in y-direction, realizes the separation of hybrid particles.
Opposite average potential is in y durection component:
In formula, R is the radius of sphere in sound field, u0For particle vibration velocity amplitude, u in medium0=2A ω, ρ0It is quiet for medium
The density of states, k0For wave number, k0=ω/c0。
2.2) acoustic radiation force F is calculatedy
By calculating the first derivative of above formula in the y-direction, point of the acoustic radiation force of spherical particle in y-direction can be obtained
Cloth:
In formula, FyFor acoustic radiation force.
As shown in Fig. 2, for the acoustic radiation force distribution in standing-wave sound field.λ is ultrasonic wavelength, is incidence end and reflection in figure
Acoustic radiation force distribution when end is at a distance of 1.5 λ.According to standing-wave sound field theory, there is acoustic pressure node in sound field, i.e. the time of sound field is average
Potential well position.Object in sound field tends to be captured acoustic pressure node by sound field.After target, which is disturbed, deviates potential well position,
By the acoustic radiation force opposite with the direction of motion, potential well position can be come back to.
2.3) baseplate material particle displacement S is calculated
Since noble metal granule density is big, the acceleration that can get acoustic radiation force by above formula is small, and baseplate material particle obtains
Acceleration is big, is influenced by acoustic radiation force.Ignore acoustic radiation force suffered by noble metal granule herein, ignores suffered by baseplate material particle
Frictional force.Baseplate material particle is left noble metal granule by radiant force, so that screening is isolated in waste printed circuit board powder
Noble metal granule.
Baseplate material particle displacement S calculation formula are as follows:
S=y (t0)
In the present embodiment, value, transducer frequency f=20000Hz, velocity of sound c in air medium are carried out to parameter0=
340m/s, air medium density p0=1.29kg/m3, baseplate material grain density ρs=2100kg/m3, initial position y0=2mm,
Transducer width L=16mm.
Solving particle displacement expression formula is solution transcendental equation, cannot write out expression formula.Ultrasonic transducer vibration frequency f is
Through given, particle displacement and conveyor belt speed v are obtained by numerical solution, the corresponding relationship of ultrasonic transducer vibration amplitude A,
As shown in Figure 3.
The displacement threshold value SL that step 3, setting baseplate material particle are separated with noble metal granule.Select the conjunction for meeting condition
Suitable conveyor belt speed v and ultrasonic transducer vibration amplitude A.
Baseplate material displacement S has maximum value limitation in Fig. 3, is no more than acoustic pressure node in sound field with particle maximum displacement
Between distance it is corresponding.Displacement threshold value takes SL in the present embodiment1=4.4mm.
Due to giving ultrasonic transducer vibration frequency f, particle displacement S and conveyor belt speed v and ultrasonic transducer are shaken
Dynamic amplitude A corresponding relationship is listed as follows:
1 particle displacement of table and transmission belt speed and ultrasonic amplitude mapping table
Note: particle displacement unit is mm in table
Find out meet condition displacement S be approximately equal to SL1It is required that parameter: conveyor belt speed v1=0.0658m/s, ultrasonic wave
Transducer vibrations amplitude A1=8.6842 μm.Baseplate material generates displacement s=4.3980mm at this time, by remaining noble metal granule
It is packed into corresponding collection vessel,
Step 4, multiple screening process.
Step 4.1) takes a part of powdered product close to ultrasonic transducer to relay after screening for the first time, after screening
It sets and moves to outlet side transport from input side again on conveyer belt, sieved next time；
Step 4.2) takes γ=0.8, and second of screening setting displacement is SL2=γ SL1=0.8*4.4=3.52mm, selection
Second of belt speed v2=0.0684m/s, A2=6.8421 μm.Baseplate material generates displacement s=3.5084mm at this time, will be remaining
Noble metal granule is packed into corresponding collection vessel.
Step 4.3) third time screening setting displacement is SL3=γ SL2=0.8*3.52=2.816mm selects second of band
Fast v2=0.0605s, A2=5m.Baseplate material generates displacement s=2.7056 at this time, and noble metal granule is packed into corresponding collection vessel.
Step 4.4) is sieved three times by above-mentioned, obtains the noble metal granule in the waste printed circuit board powder of high-purity.Phase
Than traditional chemical routes, the chemical agent complicated and harmful without preparation, is a kind of clean method of green.
Only example formula illustrates the principle of the present invention and its effect to above-mentioned specific embodiment, is not intended to limit the present invention.Appoint
What those skilled in the art all without departing from the spirit and scope of the present invention, modifies above-described embodiment or is changed
Become.Therefore, all equivalent modifications or change completed without departing from the spirit and technical ideas disclosed in the present invention, still
It should be covered by the claims of the present invention.
Claims (3)
1. a kind of method for recovering precious metals for waste printed circuit board powder, which is characterized in that comprise the steps of:
Step 1) crushes waste printed circuit board, obtains the mixed-powder of particle diameter consistent baseplate material and noble metal；
Step 2) solves following formula according to the belt speed v and ultrasonic transducer vibration amplitude A of conveyer belt, and discarded circuit is arranged
Displacement S between plate powder particle and baseplate material particle；
In formula, R is powder particle radius, ρ0For the Static Density of air, ρsFor baseplate material grain density, A is sound source vibration vibration
Width, f are sound source vibration frequency, c0For the velocity of sound of air, y is that for particle at a distance from amplitude face, L is transducer width in sound wave；ay
Indicate the second dervative of distance y, as acceleration, y (t) indicates the displacement of t time；
Mixed-powder is fallen and moves to outlet side transport from input side on a moving belt by step 3), and conveyer belt side is equipped with ultrasonic wave
Energy converter, mixed-powder of the ultrasonic transducer on conveyer belt issue acoustic radiation force, and setting meets the conveyer belt of S=SL condition
The operation of speed v and ultrasonic transducer vibration amplitude A control conveyer belt and the work of ultrasonic transducer, SL indicate substrate material
The displacement threshold value that separates with noble metal granule of material particle, the bigger noble metal granule of density, which generates displacement, to be deviateed, baseplate material with
Noble metal mutually separates；
It is more that the belt speed v and ultrasonic transducer vibration amplitude A that step 4) setting controls different conveyer belts repeat step 3) progress
Secondary screening process.
2. a kind of method for recovering precious metals for waste printed circuit board powder according to claim 1, it is characterised in that: institute
The step 4) stated specifically:
Step 4.1): a part of powdered product close to ultrasonic transducer is taken to reappose on conveyer belt after sieving for the first time
Outlet side is moved to from input side again to transport, and is sieved next time；
Step 4.2): the belt speed v and ultrasonic transducer vibration amplitude of conveyer belt are set at second of screening in the following ways
A: the displacement between setting waste printed circuit board powder particle and baseplate material particle is SL2=λ SL1, obtained by the anti-following formula that solves
Obtain belt speed v2With ultrasonic transducer vibration amplitude A2；
Wherein, SL1Indicate the displacement threshold value SL, SL when sieving for the first time2Displacement threshold value SL when indicating to sieve for second；λ is position
Move attenuation coefficient；
Then with belt speed v2With ultrasonic transducer vibration amplitude A2The operation of conveyer belt and the work of ultrasonic transducer are controlled,
Taken after screening a part of powdered product close to ultrasonic transducer reappose moved to again from input side on conveyer belt it is defeated
Side is transported and is sieved next time out, obtains noble metal after carrying out repeatedly.
3. a kind of method for recovering precious metals for waste printed circuit board powder according to claim 1, it is characterised in that: institute
The noble metal stated is gold, silver, palladium, copper etc. and its alloy.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201361619Y (en) * | 2008-12-18 | 2009-12-16 | 浙江大学 | Device utilizing ultrasonic radiation force to precisely grade ultrafine particles |
| CN101612628A (en) * | 2009-07-10 | 2009-12-30 | 广东工业大学 | The separation of each component material and recovery method in a kind of waste and old printed circuit board |
| CN106794393A (en) * | 2014-09-30 | 2017-05-31 | 弗洛设计声能学公司 | The sound swimming purification of the non-current fluid containing particle |
| CN107349687A (en) * | 2012-03-15 | 2017-11-17 | 弗洛设计声能学公司 | Sound swimming multicomponent separation technology platform |
| CN108031649A (en) * | 2018-01-25 | 2018-05-15 | 苏州思美特表面材料科技有限公司 | A kind of method of metal dust classification |
| WO2018110829A1 (en) * | 2016-12-13 | 2018-06-21 | (주)시온텍 | Scrap gravity separation apparatus |
| CN109310389A (en) * | 2016-06-21 | 2019-02-05 | 贝克顿·迪金森公司 | Device and method for the separation of acoustics particle |
-
2019
- 2019-04-12 CN CN201910294118.2A patent/CN109852810B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201361619Y (en) * | 2008-12-18 | 2009-12-16 | 浙江大学 | Device utilizing ultrasonic radiation force to precisely grade ultrafine particles |
| CN101612628A (en) * | 2009-07-10 | 2009-12-30 | 广东工业大学 | The separation of each component material and recovery method in a kind of waste and old printed circuit board |
| CN107349687A (en) * | 2012-03-15 | 2017-11-17 | 弗洛设计声能学公司 | Sound swimming multicomponent separation technology platform |
| CN106794393A (en) * | 2014-09-30 | 2017-05-31 | 弗洛设计声能学公司 | The sound swimming purification of the non-current fluid containing particle |
| CN109310389A (en) * | 2016-06-21 | 2019-02-05 | 贝克顿·迪金森公司 | Device and method for the separation of acoustics particle |
| WO2018110829A1 (en) * | 2016-12-13 | 2018-06-21 | (주)시온텍 | Scrap gravity separation apparatus |
| CN108031649A (en) * | 2018-01-25 | 2018-05-15 | 苏州思美特表面材料科技有限公司 | A kind of method of metal dust classification |
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| CN109852810B (en) | 2020-06-30 |
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