EP0341824A2 - Vorrichtung zum Abtrennen der Unreinheiten aus Flüssigkeiten - Google Patents

Vorrichtung zum Abtrennen der Unreinheiten aus Flüssigkeiten Download PDF

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Publication number
EP0341824A2
EP0341824A2 EP89303493A EP89303493A EP0341824A2 EP 0341824 A2 EP0341824 A2 EP 0341824A2 EP 89303493 A EP89303493 A EP 89303493A EP 89303493 A EP89303493 A EP 89303493A EP 0341824 A2 EP0341824 A2 EP 0341824A2
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EP
European Patent Office
Prior art keywords
fluid
filter elements
elements
magnetic
washing
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.)
Withdrawn
Application number
EP89303493A
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English (en)
French (fr)
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EP0341824A3 (de
Inventor
Kiyoshi Research Laboratories Of Shibuya
Shoji Research Laboratories Of Matsumoto
Seiko Research Laboratories Of Nara
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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
Priority claimed from JP8737288A external-priority patent/JPH01262910A/ja
Priority claimed from JP8737488A external-priority patent/JPH01262912A/ja
Priority claimed from JP8737388A external-priority patent/JPH01262911A/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0341824A2 publication Critical patent/EP0341824A2/de
Publication of EP0341824A3 publication Critical patent/EP0341824A3/de
Withdrawn legal-status Critical Current

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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
    • B03C1/029—High gradient magnetic separators with circulating matrix or matrix elements
    • 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
    • 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
    • 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
    • B03C1/034—Component parts; Auxiliary operations characterised by the magnetic circuit characterised by the matrix elements

Definitions

  • the present invention relates to an apparatus for purifying impurities in fluids for performing purification of a coolant used for cold rolling iron and steel, purification of wastewater in an exhaust gas Venturi scrubber in a converter or wastewater treatment in thermal and nuclear power station, and so forth.
  • HGMS high gradient magnetic separation
  • H relies upon the performance of magnet
  • dH/dx relies upon the characteristics of filter material
  • Kolm type HGMS device filter elements formed from stainless steel wool-like fine wires are housed into a closed chamber, which gives rise to a problem in that clogging is liable to occur, and a large quantity of water is required in backwashing.
  • the backwashing normally means that in order to discharge impurities stayed on the element outside the system, a large quanity of steam and/or hot water in the range of 70 to 90°C are caused to flow in a direction opposite to that when purification takes place (Refer to Japanese Patent Application Laid-Open Nos. 193617/1987, 19300/1987 and 154705/1986).
  • Filter elements of the HGMS device being used include stainless steel wires having an amorphous net-­like shape of a diameter of approximately 1 mm ⁇ in view of magnetic characteristic, corrosion resistance and maintenance.
  • the stainless filter composed of such a fine wire is possible to obtain a high magnetic flux density but has a residual magnetism, thus posing a problem in that even if the magnetic field is released, the magnetic particles remain adhered to the filter element and the separation efficiency when the particles are removed is poor.
  • a technique which uses an amorphous fine wire has been recently employed.
  • the amorphous fine wire has no residual magnetism, and when the magnetic field is released, the magnetic particles can be separated efficiently.
  • the amorphous fine wire is excellent in corrosion resistance.
  • the amorphous magnetic material has a magnetic distortion characteristic, which differs with the way of applying stress.
  • a material as cast improves its magnetic characteristic by applying tension thereto, but if tension is excessively applied, a delay breakdown occurs.
  • annealing the material variation of magnetic characteristic and delay breakdown due to the stress can be reduced, but brittleness occurs owing to the annealing, and the annealing leads to an increase of cost.
  • U.S. Patent No. 4,528,096 discloses a construction in which a flat ribbon made of soft magnetic amorphous alloys is wound spirally or arranged in parallel.
  • a practical problem involved in an industrial device is not solved, and the patent discloses nothing of demagnetization and backwashing.
  • An object of the present invention is to provide an apparatus which achieves an enhancement of performance of removing magnetic particles of a magnetic filter and which is simple and has a high performance.
  • a further object of the present invention is to reduce a force resisting to a magnetic force, for example, gravity, a fluid resistance and an inertia force, increase strength H of a magnetic field, and employ a large magnetic gradient dH/dx.
  • the present invention provides an apparatus for purifying impurities in fluids comprising a plurality of filter elements comprising a frame having ferromagnetic linear bodies stretched contained in a fluid flowpassage within a non-magnetic case, a magnetizing device disposed externally on the sides of said non-magnetic case, and a washing means for washing the filter elements.
  • the present invention is characterized in that a plurality of filter elements in which ferromagnetic linear bodies are contained in a non-magnetic case are dipped into a fluid flowpassage in series and in a manner capable of feeding in a horizontal direction, a magnetizing device is disposed externally on the side walls of the fluid flowpassage, and element inlet and exit portions are respectively provided on either end of said flowpassage.
  • the present invention further provides an apparatus for purifying impurities in fluids comprising a plurality of filter elements in which ferromagnetic linear bodies contained in a fluid flowpassage in a non-­magnetic case are packed in a net bag, a magnetizing device disposed externally on the side walls of said non-magnetic case, means for moving said filter elements or said magnetizing device, and washing means.
  • an inlet pipe for introducing a washing liquid or gas into a filter chamber, and a supersonic washing device is disposed in said inlet pipe to increase the washing effect.
  • the apparatus according to the present invention comprises a supersonic washing device for transmitting supersonic waves in a filter chamber to render reservoir washing possible to enhance the washing effect.
  • Fig. 1 shows a circulation system view of a coolant for rolling a steel material, which is one example to which the apparatus of the present invention is applied.
  • a coolant (rolling oil) 16 is injected out of a nozzle 18.
  • the coolant 16 is returned to tanks 20 and 22 via a pan 28 which receives a falling flow of coolant.
  • the coolant returned to the tanks contains iron powder produced from the rolling material 14 and rolls 10, 12 during rolling, and as an amount of rolling increases, the iron powder contained in the coolant is thickened.
  • the quantity of iron powder in the coolant increases, deterioration of properties of the surface of rolling material, occurence of flaw on the rolls, slip during rolling and so forth occur.
  • a bypass circuit is provided in a coolant circulation circuit, and a magnetic filter 32 is installed on the bypass circuit to discharge the iron powder in the coolant outside the system.
  • the coolant is fed under pressure from a dirty tank 22 by means of a pump 30, passes through a filter 32 and returns to the clean tank 20.
  • the thus purified coolant is fed under pressure by means of a pump 24, and passes through a mesh filter 26 for use as a mill coolant.
  • a magnetic filter 32 shown in Fig. 1 uses a Kolm type HGMS device of prior art shown in Fig. 6.
  • Fig. 6 is a longitudinal sectional view of a typical conventional Kolm type HGMS device 110.
  • This device is of the closed type in which a coil 114 and a yoke 116 are disposed around a filter element 112 formed from a stainless steel wool-like fine wire, a slurry is introduced from an inlet pipe 118, magnetic powder in the slurry is captured by the filter element 112, and liquid from which the magnetic powder is removed is discharged out of an outlet pipe 120.
  • This device is suitable for a low load and a large flow rate.
  • Figs. 8 (a) and 8 (b) are a cross sectional view and a longitudinal sectional view, respectively, of a further conventional reciprocating type magnetic filter 140 of HGMS.
  • This magnetic filter 140 has magnets 144 disposed on both lateral aides of a filter element 142 which horizontally reciprocates in a lateral direction as viewed in Fig. 8 (a), and a fluid is caused to flow down from an upper fluid inlet 16, passes through a filter element 142 and is discharged out of an outlet 148.
  • high pressure water for washing the filter element is injected out of a high pressure water pipe 150 to wash the filter element 142, and the water used for washing is discharged out of a washing water outlet 152.
  • a motor 154 causes a filter element to be reciprocated through a conduction device 156, and therefore the filter element alternately performs passing of water and washing (back washing).
  • Fig. 7 illustrates a disk type magnetic filter 130 comprising a ferromagnetic disk 132 buried with non-­magnetic columns 134. At the boundary portions therebetween magnetic impurities are captured by magnetic gradient.
  • the apparatus has only smaller magnetic gradient and lower purifying capacity as compared with those having magnetic wires, and accordingly is used only for rough purification purpose.
  • Fig. 2 shows an example of the apparatus according to the present invention.
  • the most important characteristic of the apparatus according to the present invention resides in that a flow of fluid is horizontal.
  • the gravity resisting to the magnetic force can be removed, and the flow velocity can be controlled to be low due to the flow which includes a gravity acceleration, and the fluid resistance and inertia force can be reduced.
  • the magnetic force can be secured efficiently.
  • a hard magnet or a coil can be placed on the side wall of the fluid passage, and a yoke can be installed on the bottom side of the fluid passage to render possible the increasing of the efficiency of the magnetizing device and the increasing of the strength H of the magnetic field.
  • a rectangular section of an amorphous fine wire or a ferritic stainless having a rectangular section was used to increase the magnetic gradient dH/dx.
  • Fig. 4(a) shows a gradient of a magnetic field when a magnetic wire 46 having a circular section is disposed within a magnetic field, in which magnetic particle 41 placed in the neighbourhood thereof is not adsorbed.
  • a magnetic wire 47 having a rectangular section as shown in Fig. 4(b) is disposed, the gradient of the magnetic field becomes large, particularly, the gradient of the magnetic field in a rectangular corner portion becomes large, in which magnetic particle 41 not adsorbed in Fig. 4(a) is adsorbed.
  • Fig. 2 (a), Fig. 2(b) and Fig. 2(c) show one example of the present invention, Fig. 2(a) being a longitudinal sectional view, Fig. 2(b) being a plan view, and Fig. 2(c) being a cross sectional view.
  • a plurality of filter elements 42 in which ferromagnetic linear bodies are contained in a non-­magnetic case are dipped in series into a fluid which flows horizontally within a fluid flowpassage 46, and magnets 48, 50 and a yoke 52 are used to apply a magnetic field thereto from a side wall of the fluid flowpassage 46 so that magnetic impurities in the fluid are adhered to the filter elements 42.
  • the apparatus is characterized in that the filter elements 42 washed are charged at a downstream of the flow in the fluid flowpassage 46 in a cycle depending upon conditions of the concentraction of magnetic impurities, flow rate of fluids and the like, and the filter elements 42 adhered with the magnetic impurities and deteriorated with ability are discharged from the fluid flowpassage by a pusher system to control the distribution of the abnormality concentration of the filter elements in the fluid in a flowing direction of the fluid flowpassage.
  • the charge and dicharge of the filter elements 42 are carried out by arms 64, 66 mounted on a carriage 62 which travels above the fluid flowpassage.
  • the filter elements discharged out of the fluid flowpassage are carried to an inlet 56 of a purifying device 54 and then washed by a high pressure steam or a jet from a high pressure and hot water header 70.
  • the magnetic impurities pass through a discharge duct 72 and are moved out the system.
  • the washed filter elements 44 are taken out from an outlet 58 of the purifying device and then again charged into the fluid flowpassage.
  • the fluid resistance, gravity, inertia force and the like acting on the magnetic interruptionity particles can be reduced as compared with the conventional device, and therefore, less elements of impeding the magnetic force of the ferromagnetic filter elements acting on the magnetic impurities are present, thus increasing the factor of removing the magnetic impurities.
  • An embodiment shown in Fig. 3 is of a suspension system in which filter elements 42 are suspended on a suspension device, and part of the suspended filter elements of the suspension device is charged into and discharged out of the fluid.
  • the filter elements 42 are moved by suspension arms 76 which travel along a suspension rail 74.
  • suspension arms 76 which travel along a suspension rail 74.
  • the filter elements 42 pass through the fluid flowpassage 46, they travel along a lower suspension rail 74 and are dipped into the fluid flowpassage to adsorb magnetic impurities on the filter elements.
  • the magnetic impurities stay away from the magnetic field and therefore the impurities are easily removed by the washing liquid from a magnetic introity washing header 80, recovered by an discharge duct 78 and discharged outside the system.
  • washing devices 80 and 82 are arranged at the front and rear of the dipping portion, and magnetic impurities within the fluid can be always removed with high efficiency by reciprocating a moving device 84. If the moving device 84 is formed from an endless mode, one washing device 80 will suffice and there is one moving direction.
  • the aforesaid ferromagnetic linear body may be formed of amorphous metal having a rectangular section whose width is 0.5 to 5 mm and thickness is 10 to 50 #m, and the aforesaid magnetizing device is formed from a hard magnet.
  • the aforesaid ferromagnetic linear body may be formed of ferrite system stainless having a rectangular section whose width is 0.5 to 5 mm and thickness is 10 to 50 ⁇ m, and the aforesaid magnetizing device may be formed from an electromagnet, of course.
  • Fig. 9 shows the entire construction as one example of a conventional HGMS device, in which a filter element 170 is contained in a filter case, which is magnetized by an empty core coil 172 externally disposed.
  • a liquid 174 to be purified enters from an inlet, passes through the filter element 170 and is discharged from an outlet 176.
  • a ferromagnet and strong paramagnetic material as impurities within the treating liquid are magnetically adsorbed by the filter element 170 and removed.
  • valves 162 and 166 are closed, the magnetic field of the empty core coil 172 is stopped, and valves 164 and 168 are opened so that a backwash liquid 178 is introduced through the inlet and backwashed, and caused to pass through the filter element 170 and discharged from the outlet 180, whereby the impurities adhered to the filter element 170 can be removed.
  • a treating liquid is caused to pass through a separate magnetic filter during the backwashing so that the former may be treated at all times.
  • Amorphous metal is excellent in characteristics such as magnetic characteristic, corrosion resistance and strength. Accordingly, if this is used in place of a ferritic stainless wire material so far used as a filter material, it is possible to design a magnetic filter working efficiently.
  • Table 1 shows a comparison of permeability and coercive force between ferritic stainless filter and amorphous metal filter, in which the permeability of the amorphous metal is better by 102 times than that of the ferritic stainless steel. That is, the amorphous metal is easily magnetized even in the low magnetic field, and the magnetic force can be applied to a magnetic suspended matter. Thereby, the magnetizing device can be formed from an electromagnet to a hard magnet. The residual magnetization is substantially the same therebetween, but backwashing can be easily performed because the coercive force is small.
  • Table 1 Ferritic stainless filter Amorphous filter Permeability 500 15,000 Coercive force Hc (Oe) 1.2 0.3
  • Fig. 10 shows an embodiment of an abnormality purifying apparatus according to the present invention, in which a hard magnet is used as a magnetizing device, which is mechanically moved.
  • the hard magnet is moved to a position indicated at 188.
  • an amorphous filter 182 can be simply magnetized or demagnetized.
  • a header 184 of a supersonic washing device is provided at an upstream of a backwash flow to enhance the washing effect, not to increase the flow rate of the backwash flow, reduce the flow rate, and reduce the backwash time and wastewater.
  • valves 162 to 168 are totally closed and reservoir washing is carried out by supersonic waves whereby the quantity of wastewater can be minimized. It is extremely preferable to reduce the quantity of wastewater because the wastewater brings forth the secondary pollution.
  • a supersonic washing device is directly mounted in a filter chamber or provided on a washing liquid or gas introducing pipe to reduce or stop the flow rate of a backwash flow so that washing can be made.
  • the backwashing time can be reduced, and the discharge of wasteliquid can be extremely reduced.
  • Fig. 11 shows a sheet of element of a filter in which an amorphous fine wire is stretched on a frame, in which an amorphous fine wire 192 is stretched on a frame 190 with adequate tension.
  • Fig. 12 is a view taken on line XII-XII of Fig. 11, showing a construction of a holding portion for a frame 190 for holding an amorphous fine wire.
  • the frame 190 has an iron core 194 surface of which is wound by a buffer rubber 196 in order that a local stress is not applied to the amorphous fine wire 192.
  • the amporphous fine wire 192 is wound about the frame 190 with fixed tension, outer portion of which is stopped by a fine wire holder 198.
  • Filter elements having such a constrcution as described above are laminated and put into a filter case shown in Fig. 9 for use as a filter 170.
  • Fig. 13 shows a conventional filter in which a bulbous amorphous fine wire 202 is put into a net bag 200. This is also used as a filter 170 put into a case shown in Fig. 9 similar to the embodiment.
  • Tables 1 and 2 show the characteristics of the amorphous net bag and amorphous frame-stretched filter compared with conventional SUS430 wire material. As can be seen from Tables 1 and 2, the amorphous fine wire is magnetically improved over the conventional SUS material, and by the provision of the streching on the frame, the lowering of rigidity and the increase in fluid resistance which have been noted as disadvantages of the amorphous fine wire were improved.
  • suitable tension is from 0.5 to 2.0 kgf/mm2.
  • Table 2 Filter element Coercive force HC (Oe) Saturate magnetic flux density Bs (KG) Permeability SUS 430 1mm ⁇ wire 1.2 18.0 500 Amorphous metal fine wire, in a net bag 0.3 13.0 12000 Amorphous metal fine wire, streched on a frame 0.25 13.0 13000
  • Table 3 Filter element Corrosion resistance Tensile strength Rigidity Fluid resistance * (Kgf/cm2) SUS 430 1mm ⁇ wire ⁇ 50 ⁇ 0.3 Amorphous metal fine wire, in a net bag ⁇ 300 ⁇ 0.6 Amorphous metal fine wire, streched on a frame ⁇ 300 ⁇ 0.3 Note: * Value under the same operating condition and when the removing factor of Fe is the same
  • Apparatus of Fig. 2 is used in a rolling coolant circulation circuit using a synthetic ester coolant, and an experiment was conducted, which will be described below.
  • Filter material Co70Fe5Si15B10 (Atom %) amorphous Sectional shape of a filter fine wire: 0.8 mm width x 0.02 mm thickness Permeability of filter: 15 000 Magnetized magnet: Al -Ni - Co hard magnet Strength of generated magnetic field: 2KOe Quantity of coolant treatment: 30 m3/hr Temperature of coolant: 50 - 70°C Backwash: High pressure steam, 30 sec.
  • Quantity of generated iron powder 400 g/hr Distribution of grain size of generated iron powder: Grain size: Proportion (wt.%) >32 ⁇ m 23.9 8 - 32 ⁇ m 28.2 1 - 8 ⁇ m 10.9 ⁇ 1 ⁇ m 37.0 SS - Fe magnetized : 18 emu/g SS magnetized: 1.5 emu/g
  • Embodiment 1 a filter fine wire having a circular section of 0.13 mm was used.
  • a sectional shape of a filter fine wire was 0.5 mm ⁇ .
  • Table 4 shows the removing factor of iron powder and oil take-out ratio in the above-described Embodiments 1 - 3 and Comparative Embodiments 1 - 4.
  • the force resisting to the magnetic force when the magnetic interruptionity was removed from the fluid was removed; the strength of the magnetic field was strengthened; and a rectangular cross sectional element was used to increase the magnetic gradient whereby the high removing factor of iron powder particles and low oil take-out ratio were obtained.
  • the removing factor of the magnetic impurities in the fluid is enhanced, the quantity of wastewater treatment can be reduced, and the energy is saved.
  • the magnetic filter 32 In the rolling coolant system shown in Fig. 1, the greatity purifying apparatus shown in Fig. 9 was used as the magnetic filter 32.
  • Filter material Co70Fe5Si15B10 (at. %) amorphous Sectional shape of filter wire: 0.8 mm x 0.02 mm Permeability of filter: 15. 000 Magnetized magnet: Nd - Fe - B hard magnet Supersonic exciting frequency: 800 kHz Backwash: 70°C hot water, 3 m3 30 seconds.
  • valves 162, 164, 166 and 168 were closed to employ the reservoir washing system, and the result of washing was shown in the present system II in Table 2.
  • Diameter of filter wire 1.5 mm ⁇ Permeability of filter: 500 Magnetizing magnet, electromagnet: maximum 4 KOe Backwash: Steam for five minutes and thereafter 70°C hot water at the rate of 3.5 m3 for 30 seconds.
  • the oil take-out ratio is given by:
  • the interruptionity purifying apparatus has the following excellent effects:
  • a corrosion resisting amorphous alloy, Fe76Cr2Si10B12N12 (at. %) was formed into a fine wire by use of a rotational underwater spinning method and stretched on a frame with tension of 1.5 kgf/mm2 to obtain a filter element shown in Fig. 11.
  • a filter As a comparative material, a filter was used in which a wire made of SUS430 having a diameter of 1 mm ⁇ heretofore used was formed into a bulbous configuration shown in Fig. 13.
  • Treating liquid Rolling coolant (synthetic ester)
  • Liquid temperature 60°C
  • Quantity of Fe generated 50 g/hr
  • Quantity of treated liquid 1.7 m3/hr
  • Grain distribution of Fe generated >32 ⁇ m 25 wt% 32 - 8 ⁇ m 50 wt% 8 - 1 ⁇ m 20 wt% ⁇ 1 ⁇ m 5 wt%
  • An amorphous component of Co70Fe5Si15B10 (at.%) was formed into a fine web by a single roll method using a round-hale nozzle having a diameter of 0.8 mm ⁇ .
  • An amorphous fine wire was stretched on the frame shown in Fig. 11 under the same conditions as those of the embodiment to obtain a filter element.
  • the same treating liquid, filter case, strength of magnetic field and the like as those of the embodiment were used for experiment.
  • a filter in which the same amorphous fine wire was formed into a bulbous configuration as shown in Fig. 13 which is put into a net bag was used for experiment under the same conditions.
  • the filter used for the conventional HGMS has been principally formed from a wire material of SUS 430 system which is not good in magnetic characteristic. Recently, attention has been paid to stainless fine wires and amorphous fine wires. However, the bulbous assemblies are insufficient in performances such as rigidity, pressure loss, and maintenance properties, and synthetic appraisal is not yet done.
  • the present invention provides a novel magnetic filter which has enhanced these perfomances as noted above and has the effect of remarkably enhancing the filter efficiency and further enhancing the characteristics of HGMS.

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  • Filtering Materials (AREA)
EP19890303493 1988-04-11 1989-04-10 Vorrichtung zum Abtrennen der Unreinheiten aus Flüssigkeiten Withdrawn EP0341824A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP87374/88 1988-04-11
JP87372/88 1988-04-11
JP8737288A JPH01262910A (ja) 1988-04-11 1988-04-11 流体中の不純物浄化装置
JP8737488A JPH01262912A (ja) 1988-04-11 1988-04-11 磁気フィルタ
JP87373/88 1988-04-11
JP8737388A JPH01262911A (ja) 1988-04-11 1988-04-11 流体中の不純物浄化装置

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Publication Number Publication Date
EP0341824A2 true EP0341824A2 (de) 1989-11-15
EP0341824A3 EP0341824A3 (de) 1991-05-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655881A1 (fr) * 1989-12-20 1991-06-21 Fives Cail Babcock Separateur magnetique haute intensite travaillant en humide.
US8733152B2 (en) 2010-01-19 2014-05-27 Bio-Rad Laboratories, Inc. Automated analyzer with low-pressure in-line filtration
CN114289174A (zh) * 2021-11-17 2022-04-08 镇康县振兴矿业开发有限责任公司 一种铁精矿的提质降硅工艺及装置

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Publication number Priority date Publication date Assignee Title
US2912106A (en) * 1956-09-11 1959-11-10 Magni Power Company Magnetic separator
FR2318682A1 (fr) * 1975-07-21 1977-02-18 Kloeckner Humboldt Deutz Ag Procede et dispositif pour la preparation magnetique par voie humide d'une matiere solide a grain fin
FR2349363A1 (fr) * 1976-04-29 1977-11-25 English Clays Lovering Pochin Procede et appareil pour separer d'un fluide des particules magnetisables en suspension dans ce fluide
JPS5372273A (en) * 1976-12-10 1978-06-27 Daido Steel Co Ltd Magnetic filter
JPS54158767A (en) * 1978-06-05 1979-12-14 Nec Corp Magnetic filter
GB1562941A (en) * 1977-01-07 1980-03-19 Parker M R Magnetic separators
GB2116077A (en) * 1982-02-12 1983-09-21 Organo Kk Electromagnetic filter
JPS637348A (ja) * 1986-06-25 1988-01-13 Nippon Steel Corp 磁気フィルター用磁性非晶質合金

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912106A (en) * 1956-09-11 1959-11-10 Magni Power Company Magnetic separator
FR2318682A1 (fr) * 1975-07-21 1977-02-18 Kloeckner Humboldt Deutz Ag Procede et dispositif pour la preparation magnetique par voie humide d'une matiere solide a grain fin
FR2349363A1 (fr) * 1976-04-29 1977-11-25 English Clays Lovering Pochin Procede et appareil pour separer d'un fluide des particules magnetisables en suspension dans ce fluide
JPS5372273A (en) * 1976-12-10 1978-06-27 Daido Steel Co Ltd Magnetic filter
GB1562941A (en) * 1977-01-07 1980-03-19 Parker M R Magnetic separators
JPS54158767A (en) * 1978-06-05 1979-12-14 Nec Corp Magnetic filter
GB2116077A (en) * 1982-02-12 1983-09-21 Organo Kk Electromagnetic filter
JPS637348A (ja) * 1986-06-25 1988-01-13 Nippon Steel Corp 磁気フィルター用磁性非晶質合金

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Title
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 209 (C-504)[3056], 15th June 1988; & JP-A-63 007 348 (NIPPON STEEL CORP.) 13-01-1988 *
PATENT ABSTRACTS OF JAPAN, vol. 2, no. 103 (M-78), 24th August 1978, page 3168 M 78; & JP-A-53 072 273 (DAIDO SEIKO K.K.) 27-06-1978 *
PATENT ABSTRACTS OF JAPAN, vol. 4, no. 20 (M-92), 19th February 1980, page 140 M 92; & JP-A-54 158 767 (NIPPON DENKI K.K.) 14-12-1979. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655881A1 (fr) * 1989-12-20 1991-06-21 Fives Cail Babcock Separateur magnetique haute intensite travaillant en humide.
EP0434556A1 (de) * 1989-12-20 1991-06-26 F C B Magnetische Nassabscheider mit hoher Intensität
US8733152B2 (en) 2010-01-19 2014-05-27 Bio-Rad Laboratories, Inc. Automated analyzer with low-pressure in-line filtration
CN114289174A (zh) * 2021-11-17 2022-04-08 镇康县振兴矿业开发有限责任公司 一种铁精矿的提质降硅工艺及装置
CN114289174B (zh) * 2021-11-17 2023-11-24 镇康县振兴矿业开发有限责任公司 一种铁精矿的提质降硅工艺及装置

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