CN102294301A - Particle size continuous gas-liquid interface jigging separation device of magnetic particles - Google Patents

Particle size continuous gas-liquid interface jigging separation device of magnetic particles Download PDF

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Publication number
CN102294301A
CN102294301A CN2011101496392A CN201110149639A CN102294301A CN 102294301 A CN102294301 A CN 102294301A CN 2011101496392 A CN2011101496392 A CN 2011101496392A CN 201110149639 A CN201110149639 A CN 201110149639A CN 102294301 A CN102294301 A CN 102294301A
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magnetic
particle
belt
magnet group
separation device
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CN102294301B (en
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张辉
安莎
鄢琳
马玉涛
刘博�
段武彪
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Beijing Jiaotong University
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Beijing Jiaotong University
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Abstract

The invention provides a particle size continuous gas-liquid interface jigging separation device of magnetic particles, comprising a conveyer (2) with a belt (1), a super strong magnet set (3), a discharging device (4), a particle collection pool (5) and a container (6) for accommodating dispersion liquids, Wherein the conveyer (2) is installed above the container (6); the surface roughness of the belt (1) enables separated magnetic particles to move with the belt (1); the super strong magnet set (3) is installed between the upper part of the belt and the lower part of the belt and dose not contact with the upper and lower parts of the belt; the positions of the super strong magnet set (3), the discharging device (4) and the particle collection pool (5) and the transmission direction of the belt (1) is arranged to make the particle collection pool (5) to collect the separated magnetic particles. The device provided by the invention can be applied to realize the particle size continuous separation of magnetic particles with different particle size ranges. The device provided by the invention has advantages of simple structure and high work efficiency, is easy to process, and requires low manufacturing cost.

Description

The particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle
Technical field
The present invention relates to the sorting field of magnetic-particle, the particularly a kind of device that can realize the particle diameter continous way magnetic separation of magnetic-particle.
Background technology
Magnetic-particle has a lot of particular performances, thereby be widely used in fields such as chemical industry, metallurgy, biotechnology and biomedicine, for example be used for fields such as magnetic fluid, magnetic recording material, catalyst or catalyst carrier, microwave absorbing material, cell separation, immune detection, protein purification, separate nucleic acid, targeted drug and immobilised enzymes.Recent two decades comes, and the monodisperse magnetic particle is also being brought into play important function aspect the assembling of magnetic field control photonic crystal.
According to the purposes difference, need carry out the continous way sorting to the magnetic-particle of different-grain diameter scope, this has become one of key technology in the magnetic-particle correlation technique.
At present, the magnetic-particle sorting unit mainly comprises two kinds in wet method magnetic separation device and dry method magnetic separation device, wet method magnetic separation device such as permanent-magnet drum type magnetic separator, magnetic dewater cone etc.; Dry method magnetic separation device such as permanent magnetism bitubular magnetic separator, magnet drum etc.Existing magnetic separation device, the magnetic separation device that provides in the patents such as ZL200720158038.7, CN1915528A, CN101214465A, CN101214466A, CN101590445A, ZL200720025266.7 and ZL200720159669.0 for example, no matter be dry method magnetic separation device or wet method magnetic separation device, all magnetic-particle and non-magnetic particle can only be separated, and can not realize the particle diameter continous way sorting of magnetic-particle.
Summary of the invention
The purpose of this invention is to provide a kind of device that can realize the particle diameter continous way magnetic separation of magnetic-particle.
The particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle provided by the invention comprises conveyer, super magnet group, drawing mechanism, particle collecting pit that has belt and the container that is used to hold dispersion liquid; Conveyer is installed on the top of container, the surface roughness of belt makes the magnetic-particle that sub-elects move with belt, the super magnet group is installed between upside belt and the downside belt and with the upside belt and does not all contact with the downside belt, and the position of super magnet group, drawing mechanism and particle collecting pit and the transmission direction of belt are provided so that the particle collecting pit collects the magnetic-particle that sub-elects.
Preferably, described device also comprises the adjustable support that is positioned at the container below, and this adjustable support is used to regulate the height of described container.
The size of described container is decided according to the sorting productive rate.
Described super magnet group comprises one or polylith permanent magnet, and described super magnet group comprises Nd-Fe-B permanent magnet group, samarium cobalt permanent magnet iron group or its combination permanent magnet group at least.
Described drawing mechanism comprises beveled drawing mechanism, groove shape drawing mechanism or belt-conveying type drawing mechanism.
Preferably, the slit between described super magnet group lower surface and the downside belt is not for producing the minimum range of friction between the two.
Preferably, the underside shape of described super magnet group is identical with the shape of the upper shed face of described container, and the lower surface area of described super magnet group is greater than or equals the area of the upper shed face of described container.
Preferably, described belt wants to cover the whole upper shed face of described container.
Dispersion liquid is contained in the described container, and dispersion liquid is the mixture of magnetic-particle and decentralized medium.Need choose different decentralized media at different types of magnetic-particle, the selection principle of decentralized medium is that magnetic-particle is insoluble to selected decentralized medium, but can evenly disperse in decentralized medium, and cost is low, and for example, the magnetic-particle that needs sorting is Fe 3O 4Or polystyrene (PSt)/Fe 3O 4During particle, choose the distillation water compositing dispersion medium; The magnetic-particle that needs sorting is Al 2O 3/ Fe 3O 4During particle, choose absolute ethyl alcohol and make decentralized medium; The magnetic-particle that needs sorting is ZrO 2/ Fe 3O 4During particle, choose volumetric concentration and be 50% alcohol-water mixture and make decentralized medium.
The operation principle of magnetic separation device provided by the invention is that gas-liquid interface jigging magnetic separates, be specially: under the magnetic field effect that the super magnet group produces, magnetic-particle in the dispersion liquid moves upward and by the dispersion liquid liquid level, is adsorbed on the downside belt along magnetic direction; Because the resistance difference that the magnetic-particle of different-grain diameter is subjected to during by gas-liquid interface, so when the magnetic field intensity between dispersion liquid liquid level and the downside belt immobilized, the big young pathbreaker who is adsorbed to the magnetic-particle on the downside belt was within specific particle size range; Afterwards, the magnetic-particle that is adsorbed on the downside belt is transmitted by belt; When the magnetic-particle on being adsorbed on the downside belt was transferred into drawing mechanism, the magnetic field active force disappeared, and magnetic-particle breaks away from belt and drops in the particle collecting pit, thereby sub-elected the magnetic-particle of specified particle diameter scope.By regulating distance (promptly changing the magnitude of field intensity between the two) between super magnet group lower surface and the dispersion liquid liquid level, selecting the superpower permanet magnetic iron of unlike material for use and/or select for use different decentralized media to obtain the magnetic-particle of different-grain diameter scope.
The particle diameter computing formula of using the magnetic-particle that magnetic separation device provided by the invention can sub-elect is:
d p > 18 η la v la ρ p [ 10 3 μ 0 x 0 H 2 h + 0.1 h 2 - g ( ρ p - 500 ) / ρ p ] - - - ( 1 )
In the formula: d pBe the particle diameter of the magnetic-particle that can be sub-elected, m; η LaFor air mixes viscosity, Pas with the interface of decentralized medium; v LaBe the speed of magnetic-particle when magnetic direction moves up to air and dispersion liquid interface, m/s; ρ pBe the density of magnetic-particle, kg/m 3μ 0Be airborne magnetic conductivity, and μ 0=4 π * 10 -7Wb/ (mA); x 0Be the relative magnetic susceptibility of magnetic-particle, m 3/ kg; H is the magnetic field intensity on super magnet group surface, A/m; H is the distance between super magnet group lower surface and the dispersion liquid liquid level, m; G is an acceleration of gravity, and g=9.81m/s 2.
The present invention has following beneficial effect:
Use described device and can realize the particle diameter continous way sorting of the magnetic-particle of different-grain diameter scope.Use the magnetic-particle that described device can sub-elect and comprise Fe 3O 4, SiO 2/ Fe 3O 4, Al 2O 3/ Fe 3O 4, ZrO 2/ Fe 3O 4, PSt/Fe 3O 4, polymethyl methacrylate (PMMA)/Fe 3O 4And poly (glycidyl methacrylate) (PGMA)/Fe 3O 4In the magnetic-particle one or more.Described apparatus structure is simple, high efficiency, and it is wide that device is made the material range of choice, processing easily, cost of manufacture is low.
Description of drawings
Fig. 1 is the particle diameter continous way gas-liquid interface jigging magnetic separation device schematic diagram according to the magnetic-particle of the embodiment of the invention 1;
Fig. 2 is the particle diameter continous way gas-liquid interface jigging magnetic separation device schematic diagram according to the magnetic-particle of the embodiment of the invention 2.
The specific embodiment
Below with sorting Fe 3O 4And ZrO 2/ Fe 3O 4Magnetic-particle is an example, and magnetic separation device provided by the invention is described further.
Embodiment 1
As shown in Figure 1, described device comprises conveyer 2, super magnet group 3, drawing mechanism 4, the particle collecting pit 5 that has belt 1, container 6 and the adjustable support 7 that is used to hold dispersion liquid.Container 6 is made by unorganic glass, place super magnet group 3 under, adjustable support 7 is positioned at the below of container 6, and the height of container 6 can be regulated by adjustable support 7.Conveyer 2 is installed on the top of container 6, and belt 1 has covered the whole upper shed face of container 6, and the surface roughness of belt 1 makes the magnetic-particle that sub-elects move with belt 1.Super magnet group 3 adopts the Nd-Fe-B permanent magnet group, and super magnet group 3 is installed between upside belt and the downside belt and with the upside belt and does not all contact with the downside belt, and the spacing between super magnet group 3 lower surfaces and the downside belt is 2.5mm.The underside shape of super magnet group 3 is identical with the shape of the upper shed face of container 6, and the lower surface area of super magnet group 3 is greater than the area of the upper shed face of container 6.Be connected with drawing mechanism 4 on the sidewall of container 6.Drawing mechanism 4 adopts the beveled drawing mechanism.The position of super magnet group 3, drawing mechanism 4 and particle collecting pit 5 and the transmission direction of belt 1 are provided so that particle collecting pit 5 collects the magnetic-particle that sub-elects.
Use described device sorting Fe 3O 4The concrete steps of magnetic-particle are:
(1) preparation contains Fe 3O 4The dispersion liquid of magnetic-particle, wherein Fe 3O 4The mass concentration of magnetic-particle is 0.5%, Fe 3O 4The particle size range of magnetic-particle for example is 0.1-2 μ m, and decentralized medium is a distilled water; Adopt mechanical agitation and ultrasonic dispersion to make Fe 3O 4Magnetic-particle is dispersed in the decentralized medium;
(2) with the Fe that contains of step (1) preparation 3O 4The dispersion liquid of magnetic-particle joins in the container 6, and the liquid level of dispersion liquid is about 0.2cm;
(3) if intend sorting particle diameter d pThe Fe of＞1 μ m 3O 4Magnetic-particle then utilizes known parameters numerical value η Lav La=1.88 * 10 -6Pam, ρ p=5180kg/m 3, μ 0=4 π * 10 -7Wb/ (mA), x 0=10 -3m 3/ kg, H=1.6 * 10 5A/m and g=9.81m/s 2, calculate by formula (1) and can get required super magnet group 3 lower surfaces and the distance h between the dispersion liquid liquid level is 5.0mm;
(4) to make the distance between super magnet group 3 lower surfaces and the dispersion liquid liquid level be 5.0mm to the height of regulating container 6, and then particle diameter is 1 μ m＜d pThe Fe of≤2 μ m 3O 4Magnetic-particle can be jumped out gas-liquid interface and be attracted on the belt 1, is adsorbed on the Fe on the belt 1 3O 4Magnetic-particle is transferred in the collecting pit 4;
(5) from collecting pit 4, take out the Fe that sub-elects 3O 4Magnetic-particle, its particle diameter are 1 μ m＜d p≤ 2 μ m.
Embodiment 2
As shown in Figure 2, described device comprises conveyer 2, super magnet group 3, drawing mechanism 4, particle collecting pit 5, the container 6 that is used to hold dispersion liquid, adjustable support 7, feed flow pond 8, centrifugal pump 9 and the waste liquid pool 10 that has belt 1.Container 6 is made by unorganic glass, place super magnet group 3 under, adjustable support 7 is positioned at the below of container 6, and the height of container 6 can be regulated by adjustable support 7.Conveyer 2 is installed on the top of container 6, and belt 1 has covered the whole upper shed face of container 6, and the surface roughness of belt 1 makes the magnetic-particle that sub-elects move with belt 1.Super magnet group 3 adopts the Nd-Fe-B permanent magnet group, and super magnet group 3 is installed between upside belt and the downside belt and with the upside belt and does not all contact with the downside belt, and the spacing between super magnet group 3 lower surfaces and the downside belt is 2.5mm.The underside shape of super magnet group 3 is identical with the shape of the upper shed face of container 6, and the lower surface area of super magnet group 3 is greater than the area of the upper shed face of container 6.Dispersion liquid is contained in the container 6, and container 6 is connected with feed flow pond 8 and waste liquid pool 10 respectively by the pipeline of both sides, and valve is installed on the pipeline, and is connected with a centrifugal pump 9 between container 6 and the feed flow pond 8, and centrifugal pump 9 is used for to container 6 feed flows.Be connected with drawing mechanism 4 on the sidewall of container 6.Drawing mechanism 4 adopts the beveled drawing mechanism.The position of super magnet group 3, drawing mechanism 4 and particle collecting pit 5 and the transmission direction of belt 1 are provided so that particle collecting pit 5 collects the magnetic-particle that sub-elects.
Device sorting ZrO in the Application Example 1 2/ Fe 3O 4Magnetic-particle, concrete steps are:
(1) preparation contains ZrO 2/ Fe 3O 4The dispersion liquid of magnetic-particle, wherein ZrO 2/ Fe 3O 4The mass concentration of magnetic-particle is 1.0%, ZrO 2/ Fe 3O 4The particle size range of magnetic-particle for example is 0.1-2 μ m, and decentralized medium is that volumetric concentration is 50% alcohol-water mixture; Adopt mechanical agitation and ultrasonic dispersion to make ZrO 2/ Fe 3O 4Magnetic-particle is dispersed in the decentralized medium;
(2) with the ZrO that contains of step (1) preparation 2/ Fe 3O 4The dispersion liquid of magnetic-particle joins in the container 6, and the liquid level of dispersion liquid is about 0.3cm;
(3) if intend sorting particle diameter d pThe ZrO of＞0.75 μ m 2/ Fe 3O 4Magnetic-particle then utilizes known parameters numerical value η Lav La=1.12 * 10 -6Pam, ρ p=5418kg/m 3(ZrO 2/ Fe 3O 4In the magnetic-particle, ZrO 2Clad and Fe 3O 4The mass ratio of nuclear is 1: 1), μ 0=4 π * 10 -7Wb/ (mA), x 0=8.05 * 10 -4m 3/ kg, H=2.4 * 10 5A/m and g=9.81m/s 2, calculating the lower surface and the distance h between the dispersion liquid liquid level that can get required super magnet group 3 by formula (1) is 4.0mm;
(4) to make the distance between super magnet group 3 lower surfaces and the dispersion liquid liquid level be 4.0mm to the height of regulating container 6, and then particle diameter is 0.75 μ m＜d pThe ZrO of≤2 μ m 2/ Fe 3O 4Magnetic-particle can be jumped out gas-liquid interface and be attracted on the belt 1, is adsorbed on the ZrO on the belt 1 2/ Fe 3O 4Magnetic-particle is transferred in the collecting pit 4;
(5) from collecting pit, take out the ZrO that sub-elects 2/ Fe 3O 4Magnetic-particle, its particle diameter are 0.75 μ m＜d p≤ 2 μ m.
Embodiment 1 and embodiment 2 are two preferred embodiments of the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle provided by the invention, and those skilled in the art are by regulating distance (promptly changing the magnitude of field intensity between the two) between super magnet group lower surface and the dispersion liquid liquid level, selecting the superpower permanet magnetic iron of unlike material for use and/or select for use different decentralized media can access the magnetic-particle of different-grain diameter scope.
Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art is reading on the basis of specification of the present invention and can make amendment to the technical scheme that each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (9)

1. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle, it is characterized in that this device comprises conveyer (2), super magnet group (3), drawing mechanism (4), particle collecting pit (5) that has belt (1) and the container (6) that is used to hold dispersion liquid; Conveyer (2) is installed on the top of container (6), the surface roughness of belt (1) makes the magnetic-particle that sub-elects move with belt (1), super magnet group (3) is installed between upside belt and the downside belt and with the upside belt and does not all contact with the downside belt, and the position of super magnet group (3), drawing mechanism (4) and particle collecting pit (5) and the transmission direction of belt (1) are provided so that particle collecting pit (5) collects the magnetic-particle that sub-elects.
2. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that, described device comprises the adjustable support (7) that is positioned at container (6) below.
3. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that described drawing mechanism (4) comprises beveled drawing mechanism, groove shape drawing mechanism or belt-conveying type drawing mechanism.
4. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that, described super magnet group (3) comprises Nd-Fe-B permanent magnet group, samarium cobalt permanent magnet iron group or its combination permanent magnet group at least.
5. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that, the slit between described super magnet group (3) lower surface and the downside belt is not for producing the minimum range of friction between the two.
6. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1, it is characterized in that, the underside shape of described super magnet group (3) is identical with the shape of the upper shed face of container (6), and the lower surface area of described super magnet group (3) is greater than or equals the area of the upper shed face of container (6).
7. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that, described belt (1) wants to cover the whole upper shed face of described container (6).
8. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1, it is characterized in that, by regulating distance between super magnet group (3) lower surface and the dispersion liquid liquid level, selecting the superpower permanet magnetic iron of unlike material for use and/or select for use different decentralized media to obtain the magnetic-particle of different-grain diameter scope.
9. the particle diameter continous way gas-liquid interface jigging magnetic separation device of magnetic-particle according to claim 1 is characterized in that, uses the magnetic-particle that described device can sub-elect and comprises Fe 3O 4, SiO 2/ Fe 3O 4, Al 2O 3/ Fe 3O 4, ZrO 2/ Fe 3O 4, PSt/Fe 3O 4, PMMA/Fe 3O 4And PGMA/Fe 3O 4In the magnetic-particle one or more.
CN 201110149639 2011-06-03 2011-06-03 Particle size continuous gas-liquid interface jigging separation device of magnetic particles Expired - Fee Related CN102294301B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128253A (en) * 2014-07-31 2014-11-05 广西北流仲礼瓷业有限公司 Ceramic slurry deironing channel
CN104972077A (en) * 2015-07-30 2015-10-14 乔治费歇尔汽车产品(昆山)有限公司 Magnetic suspension machine for sand box
CN112774862A (en) * 2021-02-02 2021-05-11 刘小玮 Mineral processing technology and device for chemical-grade chromium fine powder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942643A (en) * 1973-02-14 1976-03-09 Siemens Aktiengesellschaft Superconducting magnetic separator
CN2794640Y (en) * 2005-05-14 2006-07-12 吴赛男 Belt magnetic separator
RU2295391C1 (en) * 2005-07-28 2007-03-20 Евгений Васильевич Бусыгин Magnetic separator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942643A (en) * 1973-02-14 1976-03-09 Siemens Aktiengesellschaft Superconducting magnetic separator
CN2794640Y (en) * 2005-05-14 2006-07-12 吴赛男 Belt magnetic separator
RU2295391C1 (en) * 2005-07-28 2007-03-20 Евгений Васильевич Бусыгин Magnetic separator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128253A (en) * 2014-07-31 2014-11-05 广西北流仲礼瓷业有限公司 Ceramic slurry deironing channel
CN104972077A (en) * 2015-07-30 2015-10-14 乔治费歇尔汽车产品(昆山)有限公司 Magnetic suspension machine for sand box
CN112774862A (en) * 2021-02-02 2021-05-11 刘小玮 Mineral processing technology and device for chemical-grade chromium fine powder
CN112774862B (en) * 2021-02-02 2023-06-20 刘小玮 Mineral separation process and device for chemical grade chromium refined powder

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