EP1616627B1 - Séparateur magnétique à gradient élevé - Google Patents

Séparateur magnétique à gradient élevé Download PDF

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Publication number
EP1616627B1
EP1616627B1 EP05008969.7A EP05008969A EP1616627B1 EP 1616627 B1 EP1616627 B1 EP 1616627B1 EP 05008969 A EP05008969 A EP 05008969A EP 1616627 B1 EP1616627 B1 EP 1616627B1
Authority
EP
European Patent Office
Prior art keywords
gradient magnetic
magnetic separator
matrix
separation
separator according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05008969.7A
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German (de)
English (en)
Other versions
EP1616627A1 (fr
Inventor
Matthias Dr. Franzreb
Christian Reichert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karlsruher Institut fuer Technologie KIT
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Karlsruher Institut fuer Technologie KIT
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Publication of EP1616627A1 publication Critical patent/EP1616627A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332—Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/029—High gradient magnetic separators with circulating matrix or matrix elements
    • B03C1/03—High gradient magnetic separators with circulating matrix or matrix elements rotating, e.g. of the carousel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/032—Matrix cleaning systems

Definitions

  • the invention relates to a high-gradient magnetic separator according to the preamble of the first claim.
  • the separation of ferro-, ferri- or paramagnetic particles from liquid or gaseous fluids by means of magnetic separators is a basic principle of process technology used in numerous variants.
  • a particular advantage of the principle of magnetic separation is the ability to selectively separate magnetic particles from a mixture with other non-magnetic particles.
  • the choice of the magnetic separator depends on the size and the magnetic properties of the particles.
  • Coarse strong magnetic particles e.g. Magnetic ores with particle sizes> 75 ⁇ m can then be separated with simple drum or belt separators. Fine, strongly magnetic particles can also be detected from aqueous suspensions up to a size of about 10-20 ⁇ m by means of special drum separators. For even finer particles in the micrometer range (about 0.1 to 20 microns), however, so far only so-called high-gradient magnetic separation is used.
  • the functional principle of high-gradient magnetic separators is based on the generation and bundling of strong field strength gradients by introducing a ferromagnetic matrix into an external magnetic field.
  • the magnetizable elements of the matrix usually consist of disordered steel wool or ordered wire nets or profiled metal plates. They are magnetized by the external field and in turn form magnetic poles that reinforce or weaken the outer field in places.
  • the resulting, high field strength gradients result in a strong magnetic force on para- or ferromagnetic particles in the direction of higher field strength.
  • the Particles attach themselves to the induced magnetic poles of the matrix and are thus separated from the fluid.
  • the loading of the separator with separated magnetizable particles are so high that the capacity of the magnetic separator is exhausted and a matrix cleaning is required.
  • the matrix cleaning is carried out after switching off the magnetic field with a strong water jet or a backwash with high filter speeds. Due to the shape and structure of the matrix, which consists for example of steel wool or layered wire mesh and thus has numerous spaces, so-called dead volumes occur in the area of the matrix, ie areas which are not or only very slowly flowed through.
  • the desire to keep the volume of the resulting rinse concentrate as low as possible and the maximum flow rate of the pump, the amount of flushing fluid used and the achievable flow rate during the flushing process. As a result, only incomplete cleaning is achieved. In particular, particles with a high remanent magnetization are difficult to remove again. The consequence is a further strong adhesion of these particles to the matrix wires, which significantly affects the cleaning efficiency.
  • complete matrix cleaning is not absolutely necessary, but desirable and economically desirable to utilize the separator capacity.
  • the matrix cleaning is carried out by rinsing water at high flow rates in countercurrent.
  • the invention consists of a high-gradient magnetic separator for the selective deposition of magnetisable particles from a suspension, comprising a matrix which can be positioned in a magnet system as a separation zone.
  • the matrix is subdivided into plate-shaped partial volumes by plate-shaped magnetizable separation surfaces through which the suspension can flow. Furthermore, it has areas that serve as an inlet or as a drain of the suspension, wherein at least one, more preferably two separation surfaces are preferably arranged between an inlet and a drain.
  • the matrix preferably extends over a closed volume, the inlets and outlets being formed by concrete lines into this volume.
  • the separation surfaces are preferably formed by wire mesh or perforated metal foils or sheets, and may be provided with trapping structures for trapping forces from fluid flow or for clamping and securing.
  • the selective separation of magnetic particles from a suspension it is passed as a fluid flow via the inlet into the matrix and through this in at least one, preferably two separation surfaces. After passing through the separation surfaces of the fluid flow leaves the matrix through a drain, wherein the magnetizable particles are magnetically retained on the separation surfaces.
  • An essential design feature of the invention and with a particularly advantageous effect in matrix cleaning is the subdivision of the separation surfaces into at least two groups.
  • the separation surfaces of each group are mechanically, for example via a housing, a carrier or a shaft rigidly coupled together and stored in the high gradient magnetic separator either fixed or movably mounted.
  • the separation surfaces are preferably subdivided into two groups, wherein the group membership of the separation surfaces, which are preferably arranged parallel to one another in the matrix, alternates.
  • a group is firmly inserted in the housing and the second group is jointly provided on a movably mounted carrier wherein an alternating arrangement of the separation surfaces of the different groups in the matrix.
  • the movably mounted carrier is preferably motor-driven or actuator-driven, with the executable movement being cyclic, ie rotational and / or translationally oscillating in one or more directions.
  • the carrier comprises a rotatably and / or laterally movably mounted shaft around which the matrix and the separation surfaces extend rotationally symmetrically.
  • the frequency of the rotary or oscillating relative movement is usually between 5 and 1000 Hz, depending on the structural design.
  • the abovementioned mutually movable separation surface groups are not absolutely necessary.
  • a moderate relative movement of adjacent separation surfaces to one another promotes the thorough mixing of the suspension and thus the more uniform detection of the entire suspension volume during the deposition and a more uniform separation of magnetizable particles on the available separation surfaces. From a certain strength, the relative movements prevent a stable settling of the particles on the separation surfaces, thus counterproductive and should be avoided during the deposition.
  • the matrix cleaning is preferably carried out according to the countercurrent principle with a flushing fluid, wherein the relative movement of at least two of the aforementioned separation surface fractions to each other in the flushing fluid causes inertial forces, centrifugal forces, turbulence and shear forces, which detachment of magnetizable particles from the separation surfaces even in the presence of magnetic remanence or in the Influence of a magnetic field significantly improved or even only possible.
  • the high-gradient magnetic separator 1 is in the immediate range of action of a magnet system 2, which serves as a field source.
  • the magnetic field source is preferably electromagnets ( Fig. 1 ), superconducting magnet systems or even permanent magnet systems ( FIG. 2 ), wherein the high-gradient magnetic separator 1 is introduced into the magnet coil opening or between the pole shoes 3.
  • the actual high-gradient magnetic separator comprises a plurality of subunits, namely a substantially cylindrical housing 5, which is axially closed with a lid 6 and a bottom 7.
  • a shaft 8 is mounted concentrically in the housing, in the embodiment in corresponding bearings 9 in the lid and / or bottom, sealingly rotatable and connected via a coupling 10 with a drive 11.
  • Shaft, housing, cover and base plate are made of a non-magnetic material.
  • the core unit of the high-gradient magnetic separator is the matrix, which extends over the enclosed space enclosed by the housing 5, cover 6 and bottom 7 and in which the deposition of magnetizable particles takes place.
  • the suspension (fluid) with the magnetic particles to be separated enters the high-gradient magnetic separator via the inlet 4 and is distributed over the separator cross-section. The actual separation takes place in the region of the matrix on Separationsringusionn 13 and 14.
  • the purified fluid stream leaves the high-gradient magnetic separator on the flow 12.
  • inlet and outlet consist of several openings in the lid 6 and bottom 7 and have for better flow distribution in each case one conical shape.
  • the matrix is constructed according to the rotor-stator principle (cf. Fig. 3 and 4 ) and alternately comprises the aforementioned concentric arranged around the shaft and inserted in the housing 5 fixed and placed on the shaft 8 rotating separation ring discs 13 and 14, which divides the interior volume into rotationally symmetrical and axially successively arranged partial volumes.
  • the separation ring disks 13 and 14, in detail in FIG Fig. 5 each comprise a separation surface 15 of magnetizable material, preferably a wire mesh or a perforated metal foil or sheet, which can be flowed through by the suspension.
  • the separation surface 15 is bounded by an outer and an inner stabilizing ring 16 and 17, respectively.
  • the rotating Separationsringsayn 14 are mounted on the inner stabilizing rings 17 alternately with non-magnetic inner spacers 18 on the shaft 8 and clamped axially with a clamping sleeve 19.
  • the fixed Separationsringin 13 are alternately inserted via the outer stabilizing rings 16 with non-magnetic outer spacer sleeves 20 in the housing 5 and clamped by a sleeve 21.
  • the respective non-clamped inner and outer stabilizing rings 17 and 16 respectively form inner and outer spacer sleeves 18 and 20 an annular gap (see. Fig. 3 and 4 ).
  • Fig. 3 shows an embodiment with fluidly connected in series subvolumes in the matrix.
  • Fig. 4 represents an alternative concept with fluidically connected Operavolumna in the matrix.
  • the feeding of the suspension with the magnetic particles to be separated takes place via a designed as a hollow shaft shaft 8 and a plurality of these branching radial inlet holes 22 as suspension outlets in each second of the partial volumes of the matrix.
  • the flow of the purified fluid flow takes place from the partial volumes without direct inlet bore via drain holes 23, which open into a collecting channel 24, formed by the interior of a double-walled housing 25.
  • Inlet and drain bores 22 and 23 are each arranged offset, so that when flowing through the matrix at least one separation ring disk is flowed through.
  • a matrix cleaning is done from time to time, preferably in countercurrent process.
  • the criterion for the cleaning intervals is the pressure drop in the separator, which correlates with the loading of the sedimentation ring disks and indicates the need for matrix cleaning when exceeding a certain value.
  • a flushing fluid is passed from the flow through the partial volumes to the inlet, the shaft 8 are rotated with the rotating separation ring disks 13 at high speed (about 100 to 500 rev / min). The resulting shearing in the fluid flow creates turbulences which entrain the magnetic particles deposited on the separation ring disks. The separated particles will then be removed from the matrix by the superimposed purge fluid stream.
  • the efficiency of the cleaning can be further improved by the fact that the high-gradient magnetic separator 1 is deprived of the influence of a magnetic field.
  • the magnetic field can now be switched off or the high-gradient magnetic separator can be removed from the magnetic field.
  • an oscillation movement can alternatively be transmitted to the shaft 8.
  • An additional force can be built up if the shaft oscillates axially by corresponding drive and bearing in addition to a rotational movement.
  • the hydrodynamics in the filter can be influenced and thus a flow channel formation is suppressed.
  • the structure of the matrix proposed in the exemplary embodiments enables a modular and flexible construction of the high-gradient magnetic separator.
  • the number and spacing of the sub-volumes and separation ring disks can be varied in a simple manner and, according to a modular principle, also for subregions of the matrix.

Landscapes

  • Centrifugal Separators (AREA)

Claims (9)

  1. Séparateur magnétique à gradient élevé (1) permettant d'effectuer une séparation sélective de particules pouvant être magnétisées d'une suspension, comprenant une matrice pouvant être positionnée dans un système magnétique (2) constituant une zone de séparation ayant au moins une entrée (4, 22) et au moins une sortie (12, 23) de la suspension, la matrice étant subdivisée en volumes partiels alignés par des surfaces de séparation magnétisables (15) en forme de plaques pouvant être traversées par la suspension,
    caractérisé en ce que
    les surfaces de séparation (15) sont montées alternativement fixes et mobiles, les plaques de séparation mobiles étant fixées sur un support (8) monté mobile, et, en cours de fonctionnement un mouvement relatif d'au moins deux des surfaces de séparation l'une par rapport à l'autre étant provoqué par des forces d'inertie, des forces centrifuges des turbulences et des forces de cisaillement dans le fluide de balayage ajouté.
  2. Séparateur magnétique à gradient élevé conforme à la revendication 1,
    comprenant un système d'entraînement motorisé ou actionné (10, 11) du support monté mobile.
  3. Séparateur magnétique à gradient élevé conforme à la revendication 1 ou 2,
    caractérisé en ce que
    les surfaces de séparation (15) comportent une toile métallique ou un film métallique perforé ou une tôle métallique perforée.
  4. Séparateur magnétique à gradient élevé conforme à l'une des revendications 1 à 3,
    caractérisé en ce que
    le support comporte un arbre (8) monté mobile en rotation ou mobile latéralement, et la matrice et les surfaces de séparation (15) s'étendent symétriquement en rotation autour de cet arbre.
  5. Séparateur magnétique à gradient élevé conforme à la revendication 4,
    caractérisé en ce que
    les surfaces de séparation sont des parties de disques de séparation annulaires (13, 14).
  6. Séparateur magnétique à gradient élevé conforme à la revendication 4 ou 5,
    caractérisé en ce que
    la matrice s'étend dans le volume interne d'un boitier cylindrique (5) comportant un fond (7) et un couvercle (6), et sur le fond ou sur le couvercle est monté au moins un palier (9) assurant l'étanchéité de l'arbre (8).
  7. Séparateur magnétique à gradient élevé conforme à la revendication 6,
    caractérisé en ce que
    l'entrée et la sortie sont exclusivement situées sur le couvercle (6) ou sur le fond (7).
  8. Séparateur magnétique à gradient élevé conforme à la revendication 6,
    caractérisé en ce que
    le boitier est un boitier à double paroi (25) comportant un canal collecteur (24), perçages de sortie (23) s'étendant radialement vers l'intérieur à partir de celui-ci formant les sorties, et, l'arbre (8) étant un arbre creux qui, dans sa zone d'extension de la matrice comporte au moins un perçage d'entrée radial (22) constituant l'entrée.
  9. Séparateur magnétique à gradient élevé conforme à l'une des revendications précédentes,
    caractérisé en ce qu'
    est montée au moins l'une des surfaces de séparation (15) entre l'entrée (4, 22) et la sortie (12, 23).
EP05008969.7A 2004-07-16 2005-04-23 Séparateur magnétique à gradient élevé Active EP1616627B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034541A DE102004034541B3 (de) 2004-07-16 2004-07-16 Hochgradienten-Magnetabscheider

Publications (2)

Publication Number Publication Date
EP1616627A1 EP1616627A1 (fr) 2006-01-18
EP1616627B1 true EP1616627B1 (fr) 2019-02-06

Family

ID=35057049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05008969.7A Active EP1616627B1 (fr) 2004-07-16 2005-04-23 Séparateur magnétique à gradient élevé

Country Status (4)

Country Link
US (1) US7506765B2 (fr)
EP (1) EP1616627B1 (fr)
DE (1) DE102004034541B3 (fr)
DK (1) DK1616627T3 (fr)

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WO2004110635A1 (fr) * 2003-06-09 2004-12-23 Dow Corning Corporation Separateur magnetique
US8075771B2 (en) * 2005-02-17 2011-12-13 E. I. Du Pont De Nemours And Company Apparatus for magnetic field gradient enhanced centrifugation
JP4807859B2 (ja) * 2006-01-23 2011-11-02 学校法人同志社 粉状物の分級装置
EP2112957A1 (fr) * 2007-02-16 2009-11-04 Koninklijke Philips Electronics N.V. Procede et systeme de separation destines a separer des particules magnetiques, colonne de separation a utiliser dans un systeme de separation
US8641899B2 (en) 2007-05-09 2014-02-04 Petroleum Specialty Rental, Llc Method and apparatus for removing metal cuttings from an oil well drilling mud stream
US7841475B2 (en) * 2007-08-15 2010-11-30 Kalustyan Corporation Continuously operating machine having magnets
US7841474B2 (en) * 2008-11-19 2010-11-30 Outotec Oyj Beltless rare earth roll magnetic separator system and method
US8753517B2 (en) * 2009-05-29 2014-06-17 Petroleum Specialty Rental, Llc Method and apparatus for removing metallic matter from an oil well circulating completion fluid stream
CN101934248B (zh) * 2009-07-01 2013-03-13 广西远健选矿工程技术研究院 油冷式转盘高梯度磁选机
CA2811401C (fr) 2009-10-28 2017-10-03 Magnetation, Inc. Separateur magnetique
US20120132593A1 (en) * 2010-11-30 2012-05-31 General Electric Company Systems and methods for magnetic separation of biological materials
AU2012245294B2 (en) 2011-04-20 2015-10-29 Magglobal, Llc Iron ore separation device
DE102012023382A1 (de) * 2012-11-30 2014-06-18 Hochschule Trier Vorrichtung zum Abscheiden magnetischer oder magnetisierbarer Mikropartikel aus einer Suspension mittelsHochgradienten-Magnetseparation
CN104623965A (zh) * 2014-12-05 2015-05-20 赵宽学 电磁除铁机
CN107649287B (zh) * 2017-11-03 2024-04-02 沈阳隆基电磁科技股份有限公司 一种磁微流控精选机及其成套选矿设备
CN109043507A (zh) * 2018-07-05 2018-12-21 镇江华大心源食品科技有限公司 一种养生杂粮组合物及其生产方法
AU2020246969A1 (en) * 2019-03-27 2021-09-16 Cytiva Sweden Ab A method for separating biomolecules
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Also Published As

Publication number Publication date
US20060016732A1 (en) 2006-01-26
DK1616627T3 (da) 2019-05-13
EP1616627A1 (fr) 2006-01-18
US7506765B2 (en) 2009-03-24
DE102004034541B3 (de) 2006-02-02

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