EP0912248A1 - Process and device for separating mixtures of finely divided materials by means of a magnetic field - Google Patents
Process and device for separating mixtures of finely divided materials by means of a magnetic fieldInfo
- Publication number
- EP0912248A1 EP0912248A1 EP97934490A EP97934490A EP0912248A1 EP 0912248 A1 EP0912248 A1 EP 0912248A1 EP 97934490 A EP97934490 A EP 97934490A EP 97934490 A EP97934490 A EP 97934490A EP 0912248 A1 EP0912248 A1 EP 0912248A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferromagnetic particles
- mixture
- substances
- conveying
- magnet system
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 91
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 145
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 133
- 239000000126 substance Substances 0.000 claims description 78
- 238000000926 separation method Methods 0.000 claims description 18
- 230000005484 gravity Effects 0.000 claims description 13
- 230000005405 multipole Effects 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000002349 favourable effect Effects 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000006148 magnetic separator Substances 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- 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
- B03C1/033—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
- B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
- B03C1/24—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields
-
- 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
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/20—Magnetic separation of bulk or dry particles in mixtures
Definitions
- the invention relates to a method and an apparatus for
- a device for the discontinuous cleaning of ferromagnetic scrap which has a motor-driven drum equipped with a perforated bottom and an electromagnet arranged below the perforated bottom.
- the drum is loaded in batches with material to be cleaned, which is crushed when the drum rotates and the non-ferromagnetic parts by means of perforated bottom of blown compressed air can be blown up out of the drum.
- Such a device is not practical for fine dusts.
- the invention has for its object to provide a magnetic separator with which it is possible to enable a substance separation of a substance mixture containing ferromagnetic particles, even with a very high degree of purity and low residual proportions of ferromagnetic particles in the cleaned fraction.
- a mixture of substances should be separated into ferromagnetic particles and non-ferromagnetic particles for particle sizes between 0 and 1 mm.
- Such mixtures include minerals containing iron particles, ground plastics, blast furnace and steel works slags, industrial waste and others.
- the known magnetic separators are not suitable for cleanly separating such finely divided substance mixtures or for extracting the ferromagnetic particles cleanly.
- the finer that Ferromagnetic particles are the more non-ferromagnetic product is entrained with the ferromagnetic particles during the material separation, so that a clean material separation is not possible.
- fine ferromagnetic particles are packaged in the non-ferromagnetic particles in such a way that they cannot be lifted out of the mixture of substances and detached by means of the known magnetic separators.
- the invention solves the problem posed for separating finely divided substance mixtures from non-ferromagnetic particles and ferromagnetic particles with a maximum particle size up to 1 mm by means of a magnetic field according to claim 1 in that the substance mixture is conveyed in a conveying direction over a conveying surface and magnetic fields with constantly alternating field direction are generated by a magnet system arranged on the underside of the conveying surface and moving with alternating poles N, S and the mixture of substances in the conveying direction above the magnetic fields generated by the magnet system on the
- Conveying surface migrates, the ferromagnetic particles being attracted by the locally prevailing magnetic field to the conveying surface when passing through the magnetic field above the conveying surface and, depending on the size of the ferromagnetic particles and / or the change speed of the magnet system, the ferromagnetic particles opposite to or in the direction of movement of the magnet system are deflected and discharged from the conveying direction of the mixture of substances.
- the magnet system according to the invention can be used as
- Permanent magnet system or as an electromagnetic
- Magnet system be formed, in particular it is multi-pole.
- the conveyance of the mixture of substances via the conveying surface can be brought about by the action of gravity and / or vibrations caused by conveying impulses.
- 3,000 to 50,000 field changes per minute are generated by the moving magnet system to carry out the method. It is essential for the method according to the invention that the magnet system is moved in the opposite direction to the conveying direction of the mixture of substances.
- the mixture of substances travels in a conveying direction across the magnetic fields generated by the magnet system on the conveying surface transversely to the pole arrangement.
- the magnet system is moved in a plane parallel to the conveying surface of the mixture of substances.
- Magnet system performs a movement below the conveying surface in the opposite direction to the conveying direction of the mixture of substances. It is advantageous here to set the fixed conveying surface at an angle, preferably at an angle of 30 to 80 °, preferably 45 to 75 °, so that the mixture of substances is conveyed over the inclined conveying surface under the action of gravity.
- the slope depends on the mixture of substances used, the particle size distribution and also the amount of ferromagnetic particles to be removed and their size.
- a further improvement in the separation of substances is achieved in that the conveying surface, over which the mixture of substances is guided and also guided through the magnetic fields, is set in vibration and in this way the mixture of substances is loosened and the discharge of the ferromagnetic particles and the separation of substances is facilitated .
- the mixture of substances is conveyed via a fixed conveying surface and magnetic fields with a constantly changing field direction are arranged on a circular ring by a magnet system arranged on the underside of the conveying surface and rotating in a plane parallel to the conveying surface G arranged alternating poles (N, S) are generated and the mixture of substances migrates in the conveying direction over the working path formed by the magnet system in the form of a circular ring on the conveying surface, the ferromagnetic particles passing through the magnetic field above the circular ring from the magnetic field to the Conveying surface are attracted and, depending on the size of the ferromagnetic particles and / or the rotational speed of the magnet system, the ferromagnetic particles are deflected opposite to or in the direction of rotation of the magnet system along the circular path from the conveying direction of the mixture of substances and discharged.
- N, S are generated and the mixture of substances travels in the conveying direction over the magnetic fields generated by the magnet system on the conveying surface, the ferromagnetic particles being attracted by the magnetic field onto the conveying surface as the magnetic field passes through the conveying surface and the ferromagnetic particles deflected in the direction of rotation of the drum from the mixture of substances and discharged.
- the conveying drum can be effected by the action of gravity and / or vibrations, caused by conveying impulses, or by the rotation of the conveying drum itself.
- the invention proposes an apparatus for carrying out the method for separating finely divided substance mixtures from non-ferromagnetic particles and Ferromagnetic particles with a maximum particle size of up to 1 mm by means of a magnetic field according to claim 15, in which a fixed discharge plate made of a non-magnetizable material is provided as the conveying surface, which has an inlet opening on one side, in the case of an inclined conveying surface on its higher side for the task of the mixture of substances and on the opposite side there is an exit opening for the fraction containing non-ferromagnetic particles freed from the ferromagnetic particles, that a rotating turntable provided with a drive is arranged below the discharge plate and extending parallel to it and on the turntable Multi-pole magnet system with poles spaced apart from one another on a circular ring (alternating N, S), the turntable made of a soft magnetic material forming the back plate of the magnet system and in the discharge plate At least one discharge opening for the ferromagnetic particles of the mixture of substances is formed above the circular ring of
- the rapid rotation of a multi-pole magnet system and the associated frequent field changes result in the constant reorientation of the magnetized ferromagnetic and aligned according to the prevailing field direction
- Causing particles causes non-ferromagnetic particles that are previously between the ferromagnetic particles, which adhere to them, to be released and to be shaken off by the movement of the iron particles along the working path and thus also in the direction of conveyance according to the force of gravity with that of the ferromagnetic particles liberated remaining mixture of substances move over the conveying surface in the direction of gravitation and are then discharged without the ferromagnetic particles which move on or through the magnetic field.
- a multi-pole magnet system with poles arranged on a circular path, at least ten field changes should take place with one revolution of the magnet system.
- the system rotates in order to enable rapid field changes, with at least 300 to 1000 revolutions per minute preferably being provided for the magnet system, taking into account the finely divided nature of the mixture of substances.
- the method of material separation can also be carried out with a device in which a conveyor drum made of a non-magnetizable material is provided as the conveying surface and within the conveyor drum a magnet carrier mounted on a rotatable shaft, on the circumference of which the magnets with changing poles are attached and wherein the magnetic carrier is rotatable independently of the conveyor drum opposite to the direction of rotation of the conveyor drum.
- the conveyor drum is preferably surrounded by a flexible conveyor belt which is guided around the conveyor drum and a deflection roller. This is inside the conveyor drum >
- Magnet system mounted on a rotatable shaft can be independent of the drum shell, i.e. the conveyor drum and the conveyor belt.
- the conveyor drum or the conveyor belt only rotates slowly in the conveying direction at about 2 to 50 revolutions per minute
- the magnet system arranged within the conveying drum rotates in the opposite direction of rotation to the conveyor drum and the conveying direction as fast as is necessary, to generate 3,000 to 50,000 field changes per minute. This depends on the number of poles, which are alternately arranged in a circle on the magnet system.
- the areas and parts of the device that do not directly form the magnetic system such as the conveying surface and discharge plate and one that covers the conveying area
- Cover plate are preferably made of a non-magnetizable material, such as stainless steel.
- Fig. 1 is a side view of the separation device in a schematic representation
- Fig. 2 is the supervision of the turntable with multi-pole
- FIG. 3 shows the top view of the separating device according to FIG.
- Fig. 4 is a schematic representation of the
- Fig. 5 shows a schematic representation of the forced migration of the ferromagnetic particles
- FIG. 6 schematic representation of the material separation by means of a conveyor drum with a conveyor belt 7, 8 schematic side view and cross section of a conveyor drum according to FIG. 6.
- FIG. 5 shows the principle of magnetic separation by means of high-frequency field changes.
- a mixture of substances is passed over a work surface 5, of which only the ferromagnetic particles 100 are shown for the sake of simplicity.
- a magnet system which moves in the direction of the arrow D and in which a multiplicity of magnets 3 are arranged on a magnet carrier 4, the north and south magnetic poles alternating with one another.
- the direction of movement of the mixture of substances Pl is opposite to the direction of movement D of the magnet system.
- Conveying area 5 is located, i.e. deflect and separate from the non-ferromagnetic particles.
- the ferromagnetic particles of the mixture of substances are forced into a migration movement by the magnet system, since the ferromagnetic particles are always in the direction of the convergence of the field lines tl be attracted. Due to the permanent field changes caused by the magnetic system, the ferromagnetic particles magnetized by the magnetic field move in the direction of the corresponding field lines and carry out constant reorientations along the working path influenced by the magnetic field on the conveying surface in accordance with the constantly occurring field changes, which are caused by an overhead and tumbling of the ferromagnetic particles.
- FIG. 1 to 4 show an application of the material separation according to the invention, in which a fixed discharge plate is provided as the conveying surface, which is inclined and over which the mixture of substances migrates in the direction of gravity.
- the magnet system is arranged on a circular path below the conveying surface and rotates at high speed
- the 1 and 3 comprises a fixed discharge plate 5, which represents the conveying surface for the mixture of substances to be separated.
- the discharge plate is preferably erected obliquely at an angle ⁇ , for example at an angle of 70 ° with respect to the horizontal.
- the magnetic carrier in the form of a turntable 4, which is rotated in the direction of rotation D by the motor 2, is arranged under the discharge plate 5 at a short distance and parallel thereto.
- 28 poles N / S are alternately fixed at an equal distance on a circular path in the example shown, see Fig. 2.
- the poles 3 form the multipole magnet system, which enables a corresponding number of field changes along the circular path formed by the poles with one turn of the turntable 4 in the direction of rotation D. The faster the turntable 4 rotates, the higher the number of field changes per unit, viewed at a specific point, with respect to the discharge plate 5.
- the mixture of substances to be separated is applied from above to the application plate 5 via the input opening or the input area 10 and, due to the force of gravity, falls essentially downwards in the direction of conveyance F and becomes - without action of a magnetic field - discharged through the exit opening or exit area 11.
- a cover flap 6 is provided above the discharge plate 5 at the appropriate distance so as not to impede the conveying of the mixture of substances in the direction of arrow F.
- the cover flap 6 and the discharge plate 5 are made of a non-magnetizable material, for example a corresponding stainless steel.
- the discharge plate 5 has at least one, preferably three discharge openings 51, 52, 53 for the ferromagnetic particles, as can be seen in the view according to FIG. 3. These discharge openings are perforations, for example in the form of slots in the discharge plate 5. They are arranged in a region of the circular path K on which the poles 3 run below the discharge plate with the turntable 4, these discharge openings 51, 52, 53 being outside of the feed area 10 and discharge area 11 or at their edge areas.
- Discharge plate are arranged, viewed in the direction of conveyance F, narrow elongated slots, so that as far as possible no non-ferromagnetic material mixture can fall through these slots.
- a further discharge opening 53 viewed in the direction of rotation of the turntable 4, is formed approximately 90 ° from the feed area of the discharge plate 5 above the circular path K in the discharge plate 5.
- the discharge openings 51, 52 are each arranged at 90 ° from the feed area 10 on the discharge plate 5 above the circular path K of the poles 3.
- the mixture of substances containing both ferromagnetic particles 100 and non-ferromagnetic particles 101 hits the rapidly rotating magnetic system located below the discharge plate 5 and passes through its alternating magnetic field through the circular path K is indicated.
- the ferromagnetic particles are magnetized and attracted to the surface of the discharge plate 5 by the magnetic field lines and effects, while the non-magnetizable particles 101, see also FIG. 4, continue to slide freely in the conveying direction F due to gravity .
- the ferromagnetic particles 100 held on the surface of the discharge plate 5 in the region of the circular path K are now constantly exposed to a magnetic field which changes the field direction by the rotating magnet system, which inevitably leads to an overhead movement, since they are in the direction of the convergence of the field lines, which are constant change, be tightened and constantly rearrange according to the field change according to the prevailing field lines.
- the movement of the fine ferromagnetic particles 100 due to the changing magnetic field runs counter to the direction of rotation D of the turntable 4, namely in the direction of the arrows Pl.
- the ferromagnetic particles 100 With the ferromagnetic particles 100, however, non-ferromagnetic particles 101 adhering to them are also retained on the surface of the discharge plate 5 or conveyed in the direction of movement of the ferromagnetic particles 100. Due to the constant movement of the ferromagnetic particles 100, however, there is loosening between the ferromagnetic particles and those adhering to them n + non-ferromagnetic particles 101, which initially moved with the ferromagnetic particles 100 on the circular path K. Finally, the non-ferromagnetic particles 100 fall off from the ferromagnetic particles 100 and can now also travel in the direction of conveyance F via the
- Discharge plate 5 fall down.
- the ferromagnetic particles 100 migrate over a longer path along the circular path K, see arrow P1 in Fig. 4, for example over a wrap angle of about 120 °, whereby they are cleaned up by their inevitable movement due to the changing magnetic field until they Reach the discharge opening 51 and fall down through the discharge plate 5 and emerge from the removal opening 12, see FIG. 1, as a pure ferromagnetic fraction and are removed.
- ferromagnetic particles are still contained in the material mixture after passing through the magnetic field in the area 50 of the circular path in the material mixture, these are conveyed downward in the direction of arrow F and meet the magnetic field in the area 55 a second time when crossing the circular path K.
- ferromagnetic particles can now be further sorted out by the magnetic field rapidly changing the direction of the field, the ferromagnetic particles adhering to the discharge plate 5 as a result of the magnetic field effects, provided they are small enough, in turn counter to the direction of rotation D on the circular path K to hike to the discharge opening 52 and then fill through it and be discharged. If coarser ferromagnetic particles are contained in the substance mixture in the area 55, these will be with the Direction of rotation D in the direction of the discharge opening 51 move along the circular path and are discharged at 51.
- the ferromagnetic particles are set into violent rollovers as a result of the field changes, so that any non-ferromagnetic particles still adhering to the ferromagnetic particles are detached and strive towards the exit area 11 as a result of gravity on the discharge plate 5.
- the material mixture in the exit area 11 of the discharge plate 5 is cleaned to a high degree, i.e. free of ferromagnetic particles.
- the device according to the invention and the method according to the invention make it possible to purify fine-particle mixtures containing ferromagnetic particles so that the residual ferromagnetic particle content is less than 0.01% by weight.
- the speed of rotation of the turntable 4 and the number of poles in a circular ring arrangement, their spacing and size depend on the composition of the finely divided mixture of substances in quantity and quality.
- FIG. 6 shows a further application of the method according to the invention, in which the substance mixture of ferromagnetic particles 100 and non-ferromagnetic particles 101 with a maximum particle size of up to 1 mm in a conveying direction F via a slowly rotating one
- Conveyor drum 500 is conveyed and magnetic fields with a constantly changing field direction are generated by a magnet system with magnets 3 with alternating poles N, S, which is arranged inside the conveyor drum and rotates in the direction D counter to the direction of rotation FD of the conveying drum 500.
- a conveyor belt 504 is preferably provided above the conveyor drum 500 and is guided via the conveyor drum 500 with the magnet system and a deflection roller 503.
- the deflection roller 503 can be formed with the same diameter as the conveyor drum or preferably with a smaller diameter than the conveyor drum 500, as a result of which the angle of wrap of the conveyor belt 504 around the conveyor drum 500 becomes greater than 180 °.
- the magnet system is mounted on a rotatable shaft 501 by means of the bearings 507a, 507b and rotates in the direction of rotation D independently of the conveyor drum 500.
- the conveyor drum 500 is also on the shaft 501 by means of the bearings 506a, 506b and can rotate independently of the magnet system.
- the magnets 3 are attached to the magnet carrier 502, which in turn is attached to the shaft 501.
- the conveyor drum with the rotating conveyor belt 504 rotates slowly in the working direction F or FD at 2 to 50 revolutions per minute.
- the magnet system 4 rotates at as many revolutions per minute counter to the direction of rotation of the drum as is necessary, in accordance with the number of alternating poles N, S on the circumference of the magnet carrier and in relation to the conveying speed F of the conveyor belt about 3,000 to 50,000 generate magnetic field changes per minute.
- the material mixture 100, 101 is brought into the working area of the conveyor drum, where, under the action of the alternating magnetic fields, the ferromagnetic particles 100 magnetize and now the magnetized particles 100 begin a traveling movement on the conveyor belt 504, as shown in FIG. 5. This traveling movement is opposite to the direction of movement of the magnet system.
- the magnetized ferromagnetic particles 100 detach from the non-ferromagnetic particles 101.
- the non-ferromagnetic particles 100 automatically fall from the conveyor drum as a result of gravity or the conveyor belt down and can be collected in area S. and be dissipated.
- the magnetized particles 100 adhere to the conveyor belt 504 and continue their movement on the outside as the conveyor drum continues to rotate downward, as long as the conveyor belt 504 adheres to the drum surface and the alternating magnetic fields have a sufficient influence and attraction exert on the magnetized particles.
- the magnetized ones also fall ferromagnetic particles 100 and can be collected and removed at a collection point SO.
- the ferromagnetic particles 100 are then also covered
- the non-ferromagnetic particles Due to the passage of the alternating magnetic field and the forced varied movement of the ferromagnetic particles, the non-ferromagnetic particles, including those adhering to the ferromagnetic particles, can separate and there is a very clean separation of ferromagnetic particles into two fractions with a very high degree of purity of both Fractions.
Landscapes
- Non-Mechanical Conveyors (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629110 | 1996-07-19 | ||
DE19629110A DE19629110C1 (en) | 1996-07-19 | 1996-07-19 | Magnetic field separation system for fine particle mixture |
PCT/EP1997/003864 WO1998003266A1 (en) | 1996-07-19 | 1997-07-18 | Process and device for separating mixtures of finely divided materials by means of a magnetic field |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0912248A1 true EP0912248A1 (en) | 1999-05-06 |
EP0912248B1 EP0912248B1 (en) | 2002-02-13 |
Family
ID=7800243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97934490A Expired - Lifetime EP0912248B1 (en) | 1996-07-19 | 1997-07-18 | Process and device for separating mixtures of finely divided materials by means of a magnetic field |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0912248B1 (en) |
AU (1) | AU3768397A (en) |
DE (2) | DE19629110C1 (en) |
WO (1) | WO1998003266A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPO149596A0 (en) * | 1996-08-08 | 1996-08-29 | Ka Pty Ltd | Particle separator |
EP3165293B1 (en) * | 2014-07-03 | 2020-01-08 | Mitsubishi Electric Corporation | Eddy current selection device and eddy current selection method |
NZ753291A (en) * | 2016-12-20 | 2024-07-05 | Cyclomag Pty Ltd | Planar magnetic separator |
CN112756379B (en) * | 2020-12-31 | 2023-01-06 | 浙江富华电子股份有限公司 | Secondary recovery process and equipment for soft magnet waste |
CN113578794A (en) * | 2021-09-28 | 2021-11-02 | 常州武进中瑞电子科技股份有限公司 | Resistance value testing and grading machine |
DE102022212061A1 (en) | 2022-11-14 | 2024-05-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Apparatus and method for separating ferromagnetic powder particles from non-ferromagnetic powder particles mixed therewith |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4217213A (en) * | 1977-08-26 | 1980-08-12 | Siemens Aktiengesellschaft | Device for the separation of minute magnetizable particles, method and apparatus |
DE3200143A1 (en) * | 1982-01-05 | 1983-09-22 | Steinert Elektromagnetbau GmbH, 5000 Köln | METHOD AND DEVICE FOR SORTING CONDUCTIVE NON-FERROMAGNETIC COMPONENTS |
SU1069858A1 (en) * | 1982-06-17 | 1984-01-30 | Оренбургский политехнический институт | Magnetic separator |
SU1139506A1 (en) * | 1983-09-28 | 1985-02-15 | Днепропетровский Ордена Трудового Красного Знамени Горный Институт Им.Артема | Electrodynamic separator |
ES2043920T3 (en) * | 1988-05-19 | 1994-01-01 | Lindemann Maschfab Gmbh | DEVICE FOR THE SEPARATION OF NON-MAGNETIZABLE METALS FROM A MIX OF SOLIDS. |
DE9209279U1 (en) * | 1992-07-10 | 1992-09-17 | Hagemann, Andreas, 7516 Karlsbad | Device for cleaning ferromagnetic scrap |
-
1996
- 1996-07-19 DE DE19629110A patent/DE19629110C1/en not_active Expired - Fee Related
-
1997
- 1997-07-18 DE DE59706395T patent/DE59706395D1/en not_active Expired - Fee Related
- 1997-07-18 WO PCT/EP1997/003864 patent/WO1998003266A1/en active IP Right Grant
- 1997-07-18 EP EP97934490A patent/EP0912248B1/en not_active Expired - Lifetime
- 1997-07-18 AU AU37683/97A patent/AU3768397A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9803266A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59706395D1 (en) | 2002-03-21 |
DE19629110C1 (en) | 1997-03-06 |
AU3768397A (en) | 1998-02-10 |
WO1998003266A1 (en) | 1998-01-29 |
EP0912248B1 (en) | 2002-02-13 |
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