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WO1993008919A1 - Separateur magnetique a disque - Google Patents

Separateur magnetique a disque Download PDF

Info

Publication number
WO1993008919A1
WO1993008919A1 PCT/NL1992/000196 NL9200196W WO9308919A1 WO 1993008919 A1 WO1993008919 A1 WO 1993008919A1 NL 9200196 W NL9200196 W NL 9200196W WO 9308919 A1 WO9308919 A1 WO 9308919A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
container
magnets
liquid
magnetic particles
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.)
Ceased
Application number
PCT/NL1992/000196
Other languages
English (en)
Inventor
Rintje Boersma
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.)
ENVIMAG BV
Original Assignee
ENVIMAG BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ENVIMAG BV filed Critical ENVIMAG BV
Publication of WO1993008919A1 publication Critical patent/WO1993008919A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B03C1/28—Magnetic plugs and dipsticks
    • 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
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces

Definitions

  • the invention relates to a device for removing magnetic particles from a liquid, and at least one magnet, the field of which extends into the container.
  • the object of the present invention is to provide such a device which can be used continuously.
  • a disc provided with permanent magnets that is drivable in rotation, wherein the field generated by the magnets extends into the container, and wherein the disc extends partially above the liquid level, and wherein a device is arranged above the liquid level for carrying the magnetic particles outside the field generated by the magnets.
  • the disc is arranged outside the container.
  • fig. 1 shows a partially broken away, schematic perspective view of a test arrangement of a first embodi ⁇ ment of the present invention
  • fig. 2 shows a partially broken away schematic perspective view of a variant of the first embodiment of the invention
  • fig. 3 shows a partially broken away schematic perspective view of a second embodiment of the invention
  • fig. 4 is a sectional view of the embodiment depicted in fig. 3.
  • the embodiment according to fig. 1 is formed by a base 18 on which is arranged a container 19.
  • the latter has a rectangular section and a long length relative to the width.
  • the container is also high relative to its width.
  • the container is provided with a bottom plate 20 with a non-planar form, to which later reference will be made.
  • the container further comprises two side walls 21, 22 respectively and two head end walls 23, 24 respectively.
  • a shaft 25 Arranged above the container is a shaft 25 which is mounted on either side in bearing blocks 26, 27 respec ⁇ tively arranged on either side of the container. Each of the bearing blocks 26, 27 respectively is arranged on the base 18 by means of a console 28, 29 respectively. On the shaft 25 is arranged a round disc 30 in which are arranged permanent magnets 33 ordered in two circles 31, 32. The permanent magnets 33 are magnetized in the direction of the shaft 25.
  • an electric motor 34 which is fixed to the base 18 via a console 35. The electric motor 34 is coupled to the shaft 25 * by means of a coupling 36.
  • scraping members Arranged on both sides of the disc are scraping members which are each formed by a plate 37, a cutting edge 38 of which touches the plate, and wherein the plate 37 further extends downwards at an incline.
  • the plates 37 are each provided with two standing edges 39. Both plates 37 are fixed to the base 18 by means of an adjustable yoke 40.
  • the shape of the bottom plate 20 is adapted to the shape of the disc 30 so that the distance between the bottom plate and the disc is always small.
  • a partition 41 is arranged in the container 19, wherein an inlet opening 42 is formed between the partition 41 and the end wall 24 for feeding the liquid from which the magnetic particles must be removed.
  • the bottom plate 20 transposes via a threshold 43 into an inclining portion 44 which leads to an outlet duct 45.
  • a valve 46 is arranged for maintaining a constant water level.
  • the valve 46 is fixed to a shaft 47 which is rotatably mounted in the walls 21, 22.
  • the valve is formed by a first plate 48 and a second plate 49 which enclose an angle of approximately 90°.
  • the mass of the valve 46 and the dimensions thereof are chosen such that a fixed liquid level is always maintained in the container 19. When there is a danger of this fixed liquid level being exceeded the valve 46 will open more, while if this liquid level threa ⁇ tens to become too low the valve will close.
  • the operation of this device is such that the motor 34 drives the disc 30 in rotation, this such that it rotates in the direction indicated by the arrow 50.
  • liquid from which the magnetic particles will be removed is supplied via the inlet opening 41.
  • This liquid enters the container 19 and thus comes within a short distance of the magnets 33 which are received in the disc 30.
  • the distance between the side walls 21, 22 of the container herein plays a large part because the total volume of liquid must be carried into the vicinity of the magnets 33 in order to guarantee the greatest possible likelihood that the magnetic material comes within the sphere of influence of the magnets.
  • the magnetic particles must come so close to the magnets that the magnetic forces exerted by the magnets cause the par ⁇ ticles to move towards the magnet and to adhere onto the surface of the magnet.
  • the magnets are moved out of the liquid, wherein the magnetic material remains adhered to the magnet.
  • the magnets then pass the scraping member 38, wherein the magnetic material is scraped off the magnets and carried away via the plate 38.
  • the scraping member is arranged as close as possible against the disc so that the residual layer of magnetic material is negligible, although it is equally possible for the scraping member to be fixed at a short distance from the disc. It is otherwise noted herein that the thickness of the disc - to enable scraping action - is as constant as possible.
  • Fig. 2 shows a device which is suitable for lar ⁇ ger-scale applications; this comprises three units 51 connected in parallel, each of which corresponds in large measure with the device shown in fig. 1.
  • the separate units are distinguished from the device depicted in fig. 1 only in the arrangement of sepa ⁇ rate discharge ducts 52, each of which forms an integrated unit with the scraping plates 37.
  • the shape of the containers is further adapted to allow space for the ducts 52.
  • a magnetic sepa- ration has to take place in two separate phases of such a process. It is then attractive to apply a device for such a process wherein two devices according to the invention are applied simultaneously. Such devices can of course be disposed separately, although certainly in the case of one of the devices according to claims 13-19 it will be attractive to connect such devices in parallel and to attach the discs to a single shaft. Thus a saving in the number of drive motors is obtained while also a great saving of space results.
  • a container 53 which is formed by two long walls 54, 55 and two short walls 56, 57. One of the walls is provided with a protrusion 58. In order to cause the magnetic field to permeate through the wall into the container the wall will be manufactured of non-magnetic conducting material.
  • the container further comprises a bottom not shown in the drawing.
  • a feed pipe 59 is arranged on one of the short sides 56 for feeding the liquid to be cleaned, while a discharge pipe 60 is arranged on the other short side for draining the liquid from which the magnetic material has been removed.
  • a rotatable disc 61 which extends entirely on the outside of the container. This rotatable disc 61 falls wholly within the surface of the wall 55 and the protrusion 58.
  • Two concentric series of permanent magnets 62 are arranged in the rotatable disc.
  • the rotatable disc is fixed to a shaft 63 which is mounted in a number of bearing blocks 64 and which is driven by an electric motor 65.
  • a gutter 66 which serves to remove the magnetic particles which have been removed from the liquid.
  • a spray nozzle 67 is arranged which is connected to a water feed hose 68 with which a water jet 69 can be generated and which aids the transport of the material along the gutter 66.
  • a piece of soft iron is further fixed against the protrusion 58 which ensures that the field coming from the magnets is deformed.
  • the operation of this device will now be descri ⁇ bed.
  • a liquid in which magnetic particles are present is supplied by means of the feed pipe 59.
  • Magnetic par ⁇ ticles are also understood to include particles which become magnetic under the influence of a magnetic field, and which are also designated as magnetizable particles. Because of the narrowness of the container the liquid is carried into the sphere of influence of the magnets 62. It is noted here that the distance between the disc 61 and the wall 55, respectively the protrusion 58, is as small as possible, for example in the order of magnitude of a millimetre. The particles are there attracted by the magnetic field and moved towards the wall 55.
  • the particles Due to the rotation of the disc 61 which is driven in rotation by a motor 65, the particles will then be moved in a circular path along the wall 55 and the protrusion 58, wherein the path of the magnets is followed as closely as possible. This movement proceeds until the magnetic particles reach the gutter 66 and they are moved off the disc.
  • the vertical component of the force exerted by the magnets causes this movement.
  • the horizontal force exerted by the magnets must hereby be overcome.
  • a soft iron plate 70 is arranged to also form the field as favourably as possible at the point of adhesion of the gutter 66.

Landscapes

  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Dispositif permettant d'enlever les particles magnétiques d'un liquide. Il comporte un récipient (53) pourvu d'un disque rotatif (61) lui-même pourvu d'aimants permanents dont le champ s'étend jusque dans le récipient, une partie dudit disque sortant du liquide, et un dispositif (66) étant placé au-dessus du liquide et destiné à évacuer les particules magnétiques du champ généré par les aimants. De préférence, le disque se situe à l'extérieur du récipient de manière à faciliter l'enlèvement des particules de l'aimant puisque les particules ne sont pas directement contiguës à l'aimant, mais séparées de celui-ci par une courte distance. De ce fait, les forces nécessaires à l'évacuation des particules magnétiques du champ magnétique sont fortement réduites.
PCT/NL1992/000196 1991-11-08 1992-11-06 Separateur magnetique a disque Ceased WO1993008919A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9101872 1991-11-08
NL9101872 1991-11-08

Publications (1)

Publication Number Publication Date
WO1993008919A1 true WO1993008919A1 (fr) 1993-05-13

Family

ID=19859895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1992/000196 Ceased WO1993008919A1 (fr) 1991-11-08 1992-11-06 Separateur magnetique a disque

Country Status (1)

Country Link
WO (1) WO1993008919A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905520A1 (fr) * 1997-09-29 1999-03-31 F. Hoffmann-La Roche Ag Appareil de séparation de particules magnétiques
RU2170620C1 (ru) * 2000-06-29 2001-07-20 Институт физики им. Л.В. Киренского СО РАН Магнитный сепаратор
US6579453B1 (en) 1997-09-29 2003-06-17 Roche Diagnostics Corporation Apparatus for separating magnetic particles
RU2400306C1 (ru) * 2009-08-13 2010-09-27 Общество с ограниченной ответственностью "ЭРГА Плюс" Магнитный сепаратор для шаровой мельницы
CN101940978A (zh) * 2010-04-10 2011-01-12 王全永 一种湿式磁选机
RU2419493C2 (ru) * 2007-09-10 2011-05-27 Закрытое акционерное общество Управляющая горная машиностроительная компания "Рудгормаш" (ЗАО "УГМК "Рудгормаш") Многокамерный магнитный сепаратор с бегущим магнитным полем
US9011693B2 (en) 2004-12-15 2015-04-21 Orica Australia Pty Ltd Water polishing process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325384C (de) * 1919-02-14 1920-09-21 Heinrich Junkmann Dipl Ing Elektromagnetischer Nassscheider
GB570355A (en) * 1943-12-13 1945-07-03 Lumsden Machine Company Ltd Improvements in and relating to magnetic devices for removing ferrous particles fromwater
US2688403A (en) * 1951-01-08 1954-09-07 Sundstrand Magnetic Products C Magnetic separator
DE2656034A1 (de) * 1976-12-10 1978-06-15 Dinglinger Kg Dr Ing Erich Magnetfilter mit mehreren magnetscheiben

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE325384C (de) * 1919-02-14 1920-09-21 Heinrich Junkmann Dipl Ing Elektromagnetischer Nassscheider
GB570355A (en) * 1943-12-13 1945-07-03 Lumsden Machine Company Ltd Improvements in and relating to magnetic devices for removing ferrous particles fromwater
US2688403A (en) * 1951-01-08 1954-09-07 Sundstrand Magnetic Products C Magnetic separator
DE2656034A1 (de) * 1976-12-10 1978-06-15 Dinglinger Kg Dr Ing Erich Magnetfilter mit mehreren magnetscheiben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON MAGNETICS. vol. 20, no. 5, September 1984, NEW YORK US pages 1204 - 1206 J.KOPP 'permanent magnet disk separators' *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905520A1 (fr) * 1997-09-29 1999-03-31 F. Hoffmann-La Roche Ag Appareil de séparation de particules magnétiques
US6579453B1 (en) 1997-09-29 2003-06-17 Roche Diagnostics Corporation Apparatus for separating magnetic particles
RU2170620C1 (ru) * 2000-06-29 2001-07-20 Институт физики им. Л.В. Киренского СО РАН Магнитный сепаратор
US9011693B2 (en) 2004-12-15 2015-04-21 Orica Australia Pty Ltd Water polishing process
RU2419493C2 (ru) * 2007-09-10 2011-05-27 Закрытое акционерное общество Управляющая горная машиностроительная компания "Рудгормаш" (ЗАО "УГМК "Рудгормаш") Многокамерный магнитный сепаратор с бегущим магнитным полем
RU2400306C1 (ru) * 2009-08-13 2010-09-27 Общество с ограниченной ответственностью "ЭРГА Плюс" Магнитный сепаратор для шаровой мельницы
CN101940978A (zh) * 2010-04-10 2011-01-12 王全永 一种湿式磁选机

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