CN101890296A - Dielectrophoresis separation system for recycling precious metals - Google Patents
Dielectrophoresis separation system for recycling precious metals Download PDFInfo
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- CN101890296A CN101890296A CN 201010248426 CN201010248426A CN101890296A CN 101890296 A CN101890296 A CN 101890296A CN 201010248426 CN201010248426 CN 201010248426 CN 201010248426 A CN201010248426 A CN 201010248426A CN 101890296 A CN101890296 A CN 101890296A
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Abstract
The invention relates to a dielectrophoresis separation system for recycling precious metals, which comprises a mixer, a separation chamber and a collector, wherein the dielectrophoresis separation chamber is in a vertical hexagonal barrel shape; the six edges in the hexagonal barrel are respectively provided with a stainless steel sheet electrode; the center shaft in the hexagonal barrel corresponding to each stainless steel sheet electrode is evenly equipped with an insulated wire electrode; the collector is installed below the insulated wire electrodes; the lower end of the dielectrophoresis separation chamber is coaxially provided with the collector; a funnel organ is installed in the collector corresponding to the lower end of the insulated wire electrode; the funnel organ is communicated with an output pipe; and the lower bottom of the collector is provided with a cyclic outlet. The invention acquires unseparated precious metal granules in precious metal waste by utilizing the unique high selectivity and high controllability in the dielectrophoresis principle in physical chemistry to maximally recycle precious metals and minimize the possible environmental pollution caused by precious metals. The invention provides a brand new environment-friendly high-efficiency continuous separation technology for separating and recycling precious metals in tailings and waste. The invention has the advantages of environmental protection and energy saving, and is beneficial to further separation of precious metals in precious metal lean ores and tailings in China.
Description
Technical field
The invention belongs to separation technology field, relate to the noble metal separation and Extraction of precious metal minerals such as gold, especially a kind of dielectrophoresis separation system that reclaims precious metal.
Background technology
Precious metal, for example golden, silver, platinum etc., often small (diameter micron or less than the micron) particle with free state remains in mine tailing or the rubbish (as electronic waste), and there is concentration very low (it is per ton often to be lower than the hundreds of milligram) in it, and exist with ultra-thin shred, geometry is inhomogeneous, and size distribution does not wait, and this specific existing way can not be separated effectively by conventional separation method.As continue to use of the extraction of the separation method in former (richness) ore deposit to precious metal remaining in the mine tailing, and because particle concentration is too low, required investment is big, separative efficiency is low, and environmental pollution is serious.Equally, in disposal of refuse, during contained noble metal particles, be usually used in the chemical method of raw ore isolation technics,, and can cause the environmental pollution of very severe because chemical reagent not only cannot be isolated precious metal for the chemical reaction of plastics etc.Conventional physical separation method then can't be separated tiny and ultra-thin noble metal particles like this.In addition, the magnetization method also is suggested and is used to separate precious metal, but its separative efficiency is low excessively, and industrial automatization is low.
By patent retrieval, do not find as yet to adopt the dielectrophoresis principle to reclaim the report of the special equipment of precious metal.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, the dielectrophoresis separation system of the recovery precious metal of a kind of environmental protection, continuous high-efficient is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of dielectrophoresis separation system that reclaims precious metal comprises mixer, separation chamber and gatherer, and mixer separates to separation chamber's input mixture material and in the separation chamber, and the precious metal after the separation is collected through gatherer, it is characterized in that:
(1) mixer is provided with charging aperture, and the bottom of this mixer is provided with water inlet pipe, and mixer is provided with discharge nozzle, and this discharge nozzle is communicated with the dielectrophoresis separation chamber, and the below of mixer is provided with the dielectrophoresis separation chamber;
(2) the dielectrophoresis separation chamber is six vertical rib tubulars, six limits in six rib tubes all are fixed with a Thin Stainless Steel plate electrode, the uniform insulated electric conductor electrode that is equipped with in axis position in six rib tubes of corresponding each Thin Stainless Steel plate electrode is installed gatherer below the insulated electric conductor electrode;
(3) be coaxially installed with gatherer in lower end, dielectrophoresis separation chamber, corresponding insulated electric conductor electrode lower end is equipped with a funnel organ in gatherer, and this funnel organ is communicated with an efferent duct, is provided with loop exit at the lower bottom part of gatherer.
And discharge nozzle is provided with valve.
And described dielectrophoresis separation chamber is positive six rib tubulars.
Advantage of the present invention and good effect are:
1, the present invention designs whole flow process with isolated yield according to specific requirement, makes the separation process modularization, the separating technology continuous controllableization.Water circulation craft can make water recycle and economize on water, and plays the effect that cooling reduces electrocaloric effect; Two step separations (just separate and separate eventually) can make separation purity near 100%; The recirculation separation process of impurity is to guarantee that the precious metal separative efficiency is near 100%; The design of triangle separation chamber has been strengthened effect of electric field with energy-conservation, the separation chamber's design of hexagon row formula makes the application of dielectrophoresis require to amplify to be suitable for commercial Application according to reality, fill up precious metal and recycle the blank of separating technology, and environmental protection, continuous high-efficient.
2, the present invention by high selectivity, the high controllability of using dielectric principle of electrophoresis uniqueness in the physical chemistry catch unsegregated precious metal particles in the precious metal refuse with reach at utmost reclaim and with precious metal the environmental pollution that may cause be reduced to minimum, be that a brand-new environmental protection, efficient, continuous separation technology are used for separating the precious metal that reclaims mine tailing and rubbish, environmental protection and energy saving will help the further separation of China to the precious metal of precious metal lean ore and mine tailing.
Description of drawings
Fig. 1 is a special equipment profile front view of the present invention;
Fig. 2 is the cross-sectional view of Fig. 1;
Fig. 3 is that the A-A of Fig. 2 is to cross-sectional view.
The specific embodiment
Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
A kind of dielectrophoresis separation system that reclaims precious metal, comprise mixer 4, separation chamber 6 and collecting chamber 8, mixer is positioned at the top of separation chamber, its discharge nozzle 5 is communicated with the separation chamber, the coaxial installation collecting chamber in the lower end of separation chamber, collecting chamber is exported the precious metal that separates by efferent duct 9.Concrete structure is:
Mixer is provided with charging aperture 2, this charging aperture is used to throw in mixed material, the bottom of this mixer is provided with water inlet pipe 1, enter mixer by this water inlet pipe pump water, adopt this water that pressure is arranged that the separation of material in the mixer is washed into suspension, discharge nozzle set on mixer imports suspension into the dielectrophoresis separation chamber.Discharge nozzle is provided with valve 3, can not enter the dielectrophoresis separation chamber with control suspension before giving electrifying electrodes; Valve is preferably selected electric control valve, to guarantee constant input flow rate, also can reach the constant of control suspension input flow rate by selecting controllable pump certainly.
The suspension that forms at mixer enters the dielectrophoresis separation chamber through discharge nozzle, this dielectrophoresis separation chamber is designed to six vertical rib tubulars, the best is positive six rib tubulars, six limits in six rib tubes all are fixed with a Thin Stainless Steel plate electrode 11, the uniform insulated electric conductor electrode 12 that is equipped with in axis position in six rib tubes of corresponding each Thin Stainless Steel plate electrode, each Thin Stainless Steel plate electrode and pairing insulated electric conductor electrode form an asymmetric electric field, form six asymmetric electric fields in the separation chamber.Each group insulated electric conductor electrode will be joined together by the bottom, separation chamber and be connected to power connection, the Thin Stainless Steel plate electrode is then by coupling together the output that then be connected to power supply by an electric wire with all electrodes at the aperture that separates locular wall, the required effective voltage 190V in separation chamber, frequency 220kHz.Because the positive dielectrophoresis character that precious metal showed, noble metal particles contained in the suspension will be attached on the insulated electric conductor electrode, in the gatherer of being installed below the insulated electric conductor electrode slides into because it has higher proportion with respect to glassware for drinking water.The bottom of insulated electric conductor electrode is longer than Thin Stainless Steel plate electrode, generally between 0.1-5cm.If there is not this design, then can causes precious metal to pile up one by one along direction of an electric field and form a chain strip and washed away by current easily at discharging opening; In addition, even be not flushed away, thereby because the strong electric conductivity of precious metal and be attached to a part that has formed electrode on the insulated electric conductor electrode, so along with the growth gradually of precious metal chain, electric-field intensity and electric current increase, and cause localized hyperthermia.If precious metal chain long enough and touch down another electrode, short circuit will take place, and causes harm such as power supply damage.
For fear of the electric field that interfere with electrode produced, the separation chamber adopts insulating materials to make.
By flange 7 gatherer is installed in that lower end, dielectrophoresis separation chamber is coaxial, corresponding insulated electric conductor electrode lower end adopts support 14 that a funnel organ 13 is installed in gatherer, and this funnel organ is by efferent duct 9 output precious metals; The design of funnel organ is that comparing with noble metal particles because of the contaminant particles in the suspension can be very little, so its dielectrophoresis force will be littler under a low relatively voltage initial conditions and reach the highest separation purity.So, under identical voltage input condition, its displacement is also just very little.In other words, certain voltage input can be adsorbed all precious metals, but can guarantee that not necessarily contaminant particles can not enter into gatherer.
Lower bottom part at gatherer is provided with loop exit 10, and this loop exit can carry out separation recycling with entering next dielectrophoresis separation chamber through the suspension that separates.The number of times that circulates in separation is to decide in the concentration of original mixture according to different precious metals, for example, if the precious metal concentration height that is contained, and suitable with other particle size, one-level just can reach efficient separation in theory.But impurity diameters such as the clay that often contains in industrial (for example mine tailing), dust are greatly between tens nanometers to, hundred nanometers, and the precious metal diameter that is contained is mostly greater than several microns.So,, just must increase the progression that separates if reach the high-purity that precious metal separates.So entire separation system is that medelling is to design the required progression of separating technology according to concrete separate object.
Experimental data of the present invention:
With golden particulate is example, and just the separative efficiency of separating is 88%, separates to such an extent that separation efficient can be 97% eventually.By circulation, final purification efficiency can reach 100%.
Certainly, contained particulate composition difference in the various mixtures, vary in size, character also may be different, but for example gold, platinum etc. exist with free state mostly owing to precious metal, exist with the chemical combination attitude and other materials are many, when water during as medium, all dielectrophoresis character that precious metal showed is identical with the dielectrophoresis force under the same electric field intensity effect.So when the content of identical precious metal in mixture is identical, particle size is similar, the efficient of its separation also is identical.Even if differ greatly, because two steps were separated the design of continuous circulation process, its final separative efficiency also should reach 100% "
The operation principle that the present invention uses is:
Dielectrophoresis (Dielectrophoresis) technology has been applied to by success that biomedical industries is separated, richness is amassed, catch particulate and cell.This technical description be the neutral corpuscle that is positioned at non-well-balanced electric field owing to translational motion that the effect of dielectric polarization produces.Be created in dipole moment on the particulate can be by two identical carried charges but opposite polarity electric charge represent, when they during asymmetric distribution, produce the dipole moment of a macroscopic view on the particulate interface.When this dipole moment is arranged in the unshapeliness electric field, produce a clean power in the difference of the local electric field strength on particulate both sides, be called dielectrophoresis force.Because the particulate that is suspended in the media has different dielectric properties (dielectric constant) with media; particulate can by to or the direction of stronger electric-field intensity move; be called positive dielectrophoresis, the direction of perhaps more weak electric-field intensity moves, and is referred to as negative dielectrophoresis.
Because noble metal particles exists with free state, the dielectric properties of precious metal is defined as infinity, so be suspended in the effect that noble metal particles in any media will show positive dielectrophoresis, that is: noble metal particles will be moved to the direction of stronger electric-field intensity; And because other mineral matter impurity that are present in the precious metal ore deposit can not exist with free state, their dielectric properties is all less than water.So, when these impurity are suspended in the water and place the unshapeliness electric field, will showing the effect of negative dielectrophoresis, that is: these impurity will be moved to the direction opposite with the moving direction of noble metal particles.So when the mixture that contains noble metal particles suspends in water and be placed in the unshapeliness electric field, noble metal particles will be moved to the direction opposite with other materials individually, thereby reach the purpose of separating and purifying.
Yet, because high electric-field intensity is in the technical use of dielectrophoresis, among the technology that a kind of side effect (electrothermal) that is called as electrocaloric effect can often result from dielectrophoresis is used.To such an extent as to this electrocaloric effect can cause flowing of media to influence the motion of particulate; In addition, the application of dielectrophoresis is often limited to by the effect of High frequency filter, this is because the insulating barrier and the media of electrode, electrode have constituted a high-frequency filter circuit jointly, so, when electric field frequency hangs down, in the dielectrophoresis system, needs are provided higher voltage satisfying the electric-field intensity that drives particle movement, thus the consumption that has improved electric energy.
Claims (3)
1. a dielectrophoresis separation system that reclaims precious metal comprises mixer, separation chamber and gatherer, and mixer separates to separation chamber's input mixture material and in the separation chamber, and the precious metal after the separation is collected through gatherer, it is characterized in that:
(1) mixer is provided with charging aperture, and the bottom of this mixer is provided with water inlet pipe, and mixer is provided with discharge nozzle, and this discharge nozzle is communicated with the dielectrophoresis separation chamber, and the below of mixer is provided with the dielectrophoresis separation chamber;
(2) the dielectrophoresis separation chamber is six vertical rib tubulars, six limits in six rib tubes all are fixed with a Thin Stainless Steel plate electrode, the uniform insulated electric conductor electrode that is equipped with in axis position in six rib tubes of corresponding each Thin Stainless Steel plate electrode is installed gatherer below the insulated electric conductor electrode;
(3) be coaxially installed with gatherer in lower end, dielectrophoresis separation chamber, corresponding insulated electric conductor electrode lower end is equipped with a funnel organ in gatherer, and this funnel organ is communicated with an efferent duct, is provided with loop exit at the lower bottom part of gatherer.
2. the dielectrophoresis separation system of recovery precious metal according to claim 1 is characterized in that: discharge nozzle is provided with valve.
3. the dielectrophoresis separation system of recovery precious metal according to claim 1 is characterized in that: described dielectrophoresis separation chamber is positive six rib tubulars.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102484260A CN101890296B (en) | 2010-08-09 | 2010-08-09 | Dielectrophoresis separation system for recycling precious metals |
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| CN2010102484260A CN101890296B (en) | 2010-08-09 | 2010-08-09 | Dielectrophoresis separation system for recycling precious metals |
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| CN101890296A true CN101890296A (en) | 2010-11-24 |
| CN101890296B CN101890296B (en) | 2012-07-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267773A (en) * | 2011-07-22 | 2011-12-07 | 内蒙古介电电泳应用技术研究院 | Process for treating and recycling high arsenic-containing copper smelting waste water |
| WO2012019446A1 (en) * | 2010-08-09 | 2012-02-16 | 天津富金环境技术研究有限公司 | Method for continuously recycling valuable metal by dielectrophoresis without pollution |
| CN103463985A (en) * | 2013-09-10 | 2013-12-25 | 内蒙古天一环境技术有限公司 | Osmosis membrane assembly for dielectrophoresis forward-osmosis flat plate |
| CN104162484A (en) * | 2014-08-22 | 2014-11-26 | 成都代代吉前瞻科技股份有限公司 | Efficient combined dielectrophoresis air purifier |
| CN104190546A (en) * | 2014-08-19 | 2014-12-10 | 阮海生 | Electrode structure for separating microparticles as well as electrode plate and electrode array both formed by electrode structure |
| CN105381885A (en) * | 2015-10-09 | 2016-03-09 | 攀钢集团矿业有限公司 | Wet type dielectric sorting machine |
| CN109261361A (en) * | 2018-08-08 | 2019-01-25 | 青岛大学 | A kind of coaxial type dielectric micron/nano particle continuous separator |
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| US20060260944A1 (en) * | 2005-05-19 | 2006-11-23 | The Regents Of The University Of California | Method and apparatus for dielectrophoretic separation |
| CN100439916C (en) * | 2000-12-18 | 2008-12-03 | 贝克顿迪金森公司 | Electrophoresis device, electrophoreis method using electrophoresis device and utilization of electrophoresis device |
| CN201728058U (en) * | 2010-08-09 | 2011-02-02 | 天津富金环境技术研究有限公司 | Dielectrophoresis separation system for heavy metal recovery |
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Patent Citations (3)
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| CN100439916C (en) * | 2000-12-18 | 2008-12-03 | 贝克顿迪金森公司 | Electrophoresis device, electrophoreis method using electrophoresis device and utilization of electrophoresis device |
| US20060260944A1 (en) * | 2005-05-19 | 2006-11-23 | The Regents Of The University Of California | Method and apparatus for dielectrophoretic separation |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012019446A1 (en) * | 2010-08-09 | 2012-02-16 | 天津富金环境技术研究有限公司 | Method for continuously recycling valuable metal by dielectrophoresis without pollution |
| CN102267773A (en) * | 2011-07-22 | 2011-12-07 | 内蒙古介电电泳应用技术研究院 | Process for treating and recycling high arsenic-containing copper smelting waste water |
| CN102267773B (en) * | 2011-07-22 | 2012-10-10 | 内蒙古介电电泳应用技术研究院 | Process for treating and recycling high arsenic-containing copper smelting waste water |
| CN103463985A (en) * | 2013-09-10 | 2013-12-25 | 内蒙古天一环境技术有限公司 | Osmosis membrane assembly for dielectrophoresis forward-osmosis flat plate |
| CN104190546A (en) * | 2014-08-19 | 2014-12-10 | 阮海生 | Electrode structure for separating microparticles as well as electrode plate and electrode array both formed by electrode structure |
| CN104162484A (en) * | 2014-08-22 | 2014-11-26 | 成都代代吉前瞻科技股份有限公司 | Efficient combined dielectrophoresis air purifier |
| CN104162484B (en) * | 2014-08-22 | 2017-08-08 | 成都代代吉前瞻科技股份有限公司 | A kind of efficient combined-type dielectrophoresis air purifier |
| CN105381885A (en) * | 2015-10-09 | 2016-03-09 | 攀钢集团矿业有限公司 | Wet type dielectric sorting machine |
| CN105381885B (en) * | 2015-10-09 | 2017-09-05 | 攀钢集团矿业有限公司 | Wet type dielectric separation machine |
| CN109261361A (en) * | 2018-08-08 | 2019-01-25 | 青岛大学 | A kind of coaxial type dielectric micron/nano particle continuous separator |
| CN109261361B (en) * | 2018-08-08 | 2020-02-07 | 青岛大学 | Coaxial dielectric micron nano particle continuous separator |
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| CN101890296B (en) | 2012-07-04 |
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Effective date of registration: 20180423 Address after: Dalian Lushun Liaoning province 116047 mouth area Shuangshenglu No. 511 Patentee after: Wang Bing Address before: 300384 room 304, block A, 5 building, five orchid Road, Huayuan Road, Nankai District, Tianjin. Patentee before: TIANJIN FUJIN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20120704 Termination date: 20210809 |