CA1062624A - Rotary plate magnetic separator with edge keepers - Google Patents
Rotary plate magnetic separator with edge keepersInfo
- Publication number
- CA1062624A CA1062624A CA243,058A CA243058A CA1062624A CA 1062624 A CA1062624 A CA 1062624A CA 243058 A CA243058 A CA 243058A CA 1062624 A CA1062624 A CA 1062624A
- Authority
- CA
- Canada
- Prior art keywords
- filter discs
- separator
- gaps
- discs
- shaft
- 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.)
- Expired
Links
- 239000006148 magnetic separator Substances 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011236 particulate material Substances 0.000 claims abstract description 11
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 8
- 238000007790 scraping Methods 0.000 claims abstract description 7
- 230000005291 magnetic effect Effects 0.000 claims abstract description 6
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000011109 contamination Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000867 polyelectrolyte Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- B03C1/10—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/06—Filters making use of electricity or magnetism
-
- 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
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Filtering Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A magnetic separator with a number of substantially parallel filter discs which are attached along a rotatable shaft and located in planes substantially perpendicular to the shaft with gaps therebetween for a medium to be separated which, when entering the separator, contains a ferromagnetic particulate material. The filter discs contain permanent magnets for generat-ing magnetic field gradients in the gaps, and the separator is provided with scraping means which enter the gaps between the filter discs and convey scraped-off material to outside the peri-pheries of the filter discs. The separator contains filter discs provided with a band or the like of soft iron or another magnet-ically conducting material, running outside the outermost per-manent magnets, whereby the peripheral parts of the filter discs become free from fields.
A magnetic separator with a number of substantially parallel filter discs which are attached along a rotatable shaft and located in planes substantially perpendicular to the shaft with gaps therebetween for a medium to be separated which, when entering the separator, contains a ferromagnetic particulate material. The filter discs contain permanent magnets for generat-ing magnetic field gradients in the gaps, and the separator is provided with scraping means which enter the gaps between the filter discs and convey scraped-off material to outside the peri-pheries of the filter discs. The separator contains filter discs provided with a band or the like of soft iron or another magnet-ically conducting material, running outside the outermost per-manent magnets, whereby the peripheral parts of the filter discs become free from fields.
Description
10626~
It iw well-known that liquids contaminated with suspend-ed particles or dissolved high-molecular substances, for example resinous substances, can be cleaned by adding a ferromagnetic par-ticulate material, for example magnetite, iron, cobalt or nickel, to the liquid and separating the contamination together with the ferromagnetic material in a magnetic field. It is also known to clean in a similar way liquids which, from the start, are contami-nated with ferromagnetic particulate material, for example coolant leaving machine tools, for example lathes and drills. Contaminated gases can also be cleaned in principle by the addition of a ferro-magnetic particulate material and treatment in a magnetic field for separation of the contamination. It is also known to use che- -mical flocking agents simultaneously in the cleaning process, for example lime, alum, iron chloride, polyelectrolyte and water glass.
In the above-described cleaning operations a magnetic separator is used. One known such separator is built up of a ` number of substantially parallel filter discs which are attached, radially directed and spaced from each other, along a rotatable :: .
shaft. The filter discs contain permanent magnets producing ma-gnetic field gradients in the spaces located between the filter discs. The medium that is to be filtered and which, when entering , .
the separator, contains a ferromagnetic particulate material, i5 caused to pass the spaces, which causes the contaminations to adhere to the walls of the filter discs. The separator is also provided with a scraper means for scraping off the material which has adhered o the filter discs. The scraper means may, among other things, be formed as endless conveyor belts, each of which enters into a space between the filter discs and extends outside the filter discs. Such a scraper means also takes care of the removal of the contaminations. The scraper means may also, for example, be of a finger-like type, in which case one finger ` enters each space between the fil~er discs.
, .
:' 1~, .
106Z6Z~
A problem connected wi-th magnetic separators of the kind described is that scraped-off material may get stuck on the outwardly-turned edges of the filter discs between the individual scrapers and via the edges be returned to and re-contaminate al-ready separated medium as the filter discs rotate. The problem - is especially annoying in such separators where scraped-off mate-rial is transported past the edges of the discs.
According to the present invention it has proved pos-sible to avoid the unfavoura~le process described above, thus improving the efficiency of the separators.
The present invention relates more particularly to a magnetic separator with a number of substantially parallel filter discs which are attached along a rotatable shaft and located in planes substantially perpendicular to the shaft with gaps there-between for the medium to be separated which, when entering the separator, contains a ferromagnetic particulate material, the filter discs containing permanent magnets for generating magnetic field gradients in said gaps, and the separator being provided with a scraping means for scraping off the particulate material, which adheres to the filter discs when the medium flows through the gaps and which enters the gaps between the filter discs and conveys scraped-off material to outside the peripheries of the filter discs, characterized in that the separator contains filter discs which are provided with a band of a magnetically conducting ~, material, running outside the outermost permanent magnets, whe-reby the peripheral parts of the filter discs become free from ` fields.
Through the measure according to the present invention, : ~;
the magnetic field outside the outermost magnets is conducted en-tirely in the band of magnetically conducting material. The field ' is thus short-circuited outside the outwardly-turned edges of the ;~ filter discs. Besides soft iron it is posslble to use other magne-:
:; i~4~ .
- .. .
~- j ~062624 tically conducting materials in the band such as nickel, cobalt and alloys of iron, nickel and cobalt.
The invention will be explained in greater detail by way of examples with reference to the accompanying drawings, in which Figure 1 schematically shows a separator according to the invention perpendicular to the direction of flow of the me-dium (the scraper means not shown);
Figure 2 illustrates the same separat~r in the flow direction of the medium;
Figure 3 sch~matically shDws a filber disc in the separator according to Figures 1 and 2, one wall being partly removed; and, Figure 4 is a cross-sect~ion of a part of the filter disc according to Figure 3.
The magnetic separator according to Figures 1 and 2 con-sists of a plurality of fllter discs 1, each one consisting of two parallel walls la and lb between which permanent magnets are arranged, as will ~e explained further with reference to the des-cription of Figures 3 and 4. The filter discs are arranged paral-lel to each other along the shaft 2 of the separator and are locat-ed in planes perpendicular to the shaft. The separator shaft comprises in the exemplified case a central, wide part 2a, flanges 2b and 2c and shaft ends 2d and 2e which are journalled ln supports ~ -3a and 3b. The shaft is driven b~ a motor 4 via a gear 5. The i unit consisting of the filter discs mounted on the shaft 2 is .J
i~ arranged in a tank 6 for the medium to be cleaned, usually conta-minated water. The tank inlet is designated 7 and its outlet 8.
When flowing through the separator the medium is conveyéd through gaps 9 between the discs 1. In that process, ferromagnetic par-; 30 ticles, with the substances which are to be separated attached to j them, adhere to the walls of the separator discs and accompany these walls during rotation of the discs, which preferably is ; _ 3 _ A
~.................................... ~ `. .
~06Z6Z4 performed against the direction of flow of the medium. The sepa-rator is provided with a scraper means 10 consisting of endless conveyor belts arranged in each gap between the discs and in the gaps lla and llb outside the outermost walls. Each conveyor belt consists in the exemplified case of a belt 12 of rubber or stainless steel which surrounds the central part 2a of the sepa-rator shaft and a roll 13 located outside the discs. The belt can be driven either by the separator shaft or the roll 13 or by both. When the discs rotate the adherent material is scraped off when passing the belt 12. The belt does not have to run tightly against the diScs, but there can be a small play to reduce the wear. The material 14 scraped off by the belt is transported by ; the belt to a collecting container 15. It is possible to have a simple scraper means arranged at the roll 13 to prevent scraped-` off material from being returned to the separator.
As is clear from Figures 3 and 4, each filter disc 1 consists of two walls la and lb, for example of stainless steel and having a thickness of 0.5 mm. Magnets 16 of barium ferrite are closely packed between the walls from the shaft hole 17 to the periphery. Instead of barium ferrite magnets there can be used other ceramic magnets, such as strontium ferrite. In principle, it is also possible to use metallic magnets, such as e.g. sama-- rium-cobalt magnets. The magnets are fixed to the walls by a glue, preferably of a cold-setting type, for example an epoxy resin glue (such as Araldit (a trademark) AW 106 100 parts by weight with hardener HW 953 U 80 parts by weight from CIBA AG Swit~erland).
,~.;
The magnets may, for example, have a length in the magnetising direction of 5-10 mm and an area of 1-5 cm2 perpendicular to the magnetising direction. Two adjacent magnets within the same disc have different polarities in the example shown.
As is also clear from Figures 3 and 4, a strip of soft iron 18 is arranged outside the magnets which are located remotest :, -AL
:
, . ., ~ :
- :
from the shaft o the separator. The strip may suitably have a thickness of 2 mm. The spaces between the magnets 16 and the strip 18 is filled up with a rubber material 19. A seal 20 of the same rubber material is also arranged outside the strip between the walls la and lb. The rubber material is suitably of cold-setting type, for example a cold-settin~ silicon rubber (such as Gurisil (a trademark) from Gurit AG, Switzerland) which is cured on the spot. The strip 18 makes the peripheral parts of the filter discs free from fields and prevents such particulate material, which has been scraped off the filter discs by the belts 12, from adhering to the edges of the filter discs outside the seals 20. In this way it is also prevented that filtered water in the tank 6 is recon-tamlnated by particulate material from the edges of the filter , discs while the filter discs are in rotation.
,.......................................................................... .
.
.:' "', :' , . -. ~ :
,' ' ' ., ~
. :
,.
.. . .
.. ~ .
, ' ' ' , :
:
,:
It iw well-known that liquids contaminated with suspend-ed particles or dissolved high-molecular substances, for example resinous substances, can be cleaned by adding a ferromagnetic par-ticulate material, for example magnetite, iron, cobalt or nickel, to the liquid and separating the contamination together with the ferromagnetic material in a magnetic field. It is also known to clean in a similar way liquids which, from the start, are contami-nated with ferromagnetic particulate material, for example coolant leaving machine tools, for example lathes and drills. Contaminated gases can also be cleaned in principle by the addition of a ferro-magnetic particulate material and treatment in a magnetic field for separation of the contamination. It is also known to use che- -mical flocking agents simultaneously in the cleaning process, for example lime, alum, iron chloride, polyelectrolyte and water glass.
In the above-described cleaning operations a magnetic separator is used. One known such separator is built up of a ` number of substantially parallel filter discs which are attached, radially directed and spaced from each other, along a rotatable :: .
shaft. The filter discs contain permanent magnets producing ma-gnetic field gradients in the spaces located between the filter discs. The medium that is to be filtered and which, when entering , .
the separator, contains a ferromagnetic particulate material, i5 caused to pass the spaces, which causes the contaminations to adhere to the walls of the filter discs. The separator is also provided with a scraper means for scraping off the material which has adhered o the filter discs. The scraper means may, among other things, be formed as endless conveyor belts, each of which enters into a space between the filter discs and extends outside the filter discs. Such a scraper means also takes care of the removal of the contaminations. The scraper means may also, for example, be of a finger-like type, in which case one finger ` enters each space between the fil~er discs.
, .
:' 1~, .
106Z6Z~
A problem connected wi-th magnetic separators of the kind described is that scraped-off material may get stuck on the outwardly-turned edges of the filter discs between the individual scrapers and via the edges be returned to and re-contaminate al-ready separated medium as the filter discs rotate. The problem - is especially annoying in such separators where scraped-off mate-rial is transported past the edges of the discs.
According to the present invention it has proved pos-sible to avoid the unfavoura~le process described above, thus improving the efficiency of the separators.
The present invention relates more particularly to a magnetic separator with a number of substantially parallel filter discs which are attached along a rotatable shaft and located in planes substantially perpendicular to the shaft with gaps there-between for the medium to be separated which, when entering the separator, contains a ferromagnetic particulate material, the filter discs containing permanent magnets for generating magnetic field gradients in said gaps, and the separator being provided with a scraping means for scraping off the particulate material, which adheres to the filter discs when the medium flows through the gaps and which enters the gaps between the filter discs and conveys scraped-off material to outside the peripheries of the filter discs, characterized in that the separator contains filter discs which are provided with a band of a magnetically conducting ~, material, running outside the outermost permanent magnets, whe-reby the peripheral parts of the filter discs become free from ` fields.
Through the measure according to the present invention, : ~;
the magnetic field outside the outermost magnets is conducted en-tirely in the band of magnetically conducting material. The field ' is thus short-circuited outside the outwardly-turned edges of the ;~ filter discs. Besides soft iron it is posslble to use other magne-:
:; i~4~ .
- .. .
~- j ~062624 tically conducting materials in the band such as nickel, cobalt and alloys of iron, nickel and cobalt.
The invention will be explained in greater detail by way of examples with reference to the accompanying drawings, in which Figure 1 schematically shows a separator according to the invention perpendicular to the direction of flow of the me-dium (the scraper means not shown);
Figure 2 illustrates the same separat~r in the flow direction of the medium;
Figure 3 sch~matically shDws a filber disc in the separator according to Figures 1 and 2, one wall being partly removed; and, Figure 4 is a cross-sect~ion of a part of the filter disc according to Figure 3.
The magnetic separator according to Figures 1 and 2 con-sists of a plurality of fllter discs 1, each one consisting of two parallel walls la and lb between which permanent magnets are arranged, as will ~e explained further with reference to the des-cription of Figures 3 and 4. The filter discs are arranged paral-lel to each other along the shaft 2 of the separator and are locat-ed in planes perpendicular to the shaft. The separator shaft comprises in the exemplified case a central, wide part 2a, flanges 2b and 2c and shaft ends 2d and 2e which are journalled ln supports ~ -3a and 3b. The shaft is driven b~ a motor 4 via a gear 5. The i unit consisting of the filter discs mounted on the shaft 2 is .J
i~ arranged in a tank 6 for the medium to be cleaned, usually conta-minated water. The tank inlet is designated 7 and its outlet 8.
When flowing through the separator the medium is conveyéd through gaps 9 between the discs 1. In that process, ferromagnetic par-; 30 ticles, with the substances which are to be separated attached to j them, adhere to the walls of the separator discs and accompany these walls during rotation of the discs, which preferably is ; _ 3 _ A
~.................................... ~ `. .
~06Z6Z4 performed against the direction of flow of the medium. The sepa-rator is provided with a scraper means 10 consisting of endless conveyor belts arranged in each gap between the discs and in the gaps lla and llb outside the outermost walls. Each conveyor belt consists in the exemplified case of a belt 12 of rubber or stainless steel which surrounds the central part 2a of the sepa-rator shaft and a roll 13 located outside the discs. The belt can be driven either by the separator shaft or the roll 13 or by both. When the discs rotate the adherent material is scraped off when passing the belt 12. The belt does not have to run tightly against the diScs, but there can be a small play to reduce the wear. The material 14 scraped off by the belt is transported by ; the belt to a collecting container 15. It is possible to have a simple scraper means arranged at the roll 13 to prevent scraped-` off material from being returned to the separator.
As is clear from Figures 3 and 4, each filter disc 1 consists of two walls la and lb, for example of stainless steel and having a thickness of 0.5 mm. Magnets 16 of barium ferrite are closely packed between the walls from the shaft hole 17 to the periphery. Instead of barium ferrite magnets there can be used other ceramic magnets, such as strontium ferrite. In principle, it is also possible to use metallic magnets, such as e.g. sama-- rium-cobalt magnets. The magnets are fixed to the walls by a glue, preferably of a cold-setting type, for example an epoxy resin glue (such as Araldit (a trademark) AW 106 100 parts by weight with hardener HW 953 U 80 parts by weight from CIBA AG Swit~erland).
,~.;
The magnets may, for example, have a length in the magnetising direction of 5-10 mm and an area of 1-5 cm2 perpendicular to the magnetising direction. Two adjacent magnets within the same disc have different polarities in the example shown.
As is also clear from Figures 3 and 4, a strip of soft iron 18 is arranged outside the magnets which are located remotest :, -AL
:
, . ., ~ :
- :
from the shaft o the separator. The strip may suitably have a thickness of 2 mm. The spaces between the magnets 16 and the strip 18 is filled up with a rubber material 19. A seal 20 of the same rubber material is also arranged outside the strip between the walls la and lb. The rubber material is suitably of cold-setting type, for example a cold-settin~ silicon rubber (such as Gurisil (a trademark) from Gurit AG, Switzerland) which is cured on the spot. The strip 18 makes the peripheral parts of the filter discs free from fields and prevents such particulate material, which has been scraped off the filter discs by the belts 12, from adhering to the edges of the filter discs outside the seals 20. In this way it is also prevented that filtered water in the tank 6 is recon-tamlnated by particulate material from the edges of the filter , discs while the filter discs are in rotation.
,.......................................................................... .
.
.:' "', :' , . -. ~ :
,' ' ' ., ~
. :
,.
.. . .
.. ~ .
, ' ' ' , :
:
,:
Claims
1. A magnetic separator with a number of substantially parallel filter discs which are attached along a rotatable shaft and located in planes substantially perpendicular to the shaft with gaps therebetween for the medium to be separated which, when en-tering the separator, contains a ferromagnetic particulate mate-rial, the filter discs containing permanent magnets for generating magnetic field gradients in said gaps, and the separator being provided with a scraping means for scraping off the particulate material, which adheres to the filter discs when the medium flows through the gaps, the scraping means entering the gaps between the filter discs and conveying scraped-off material to outside the peripheries of the filter discs, characterized in that the separator contains filter discs which are provided with a band of a magnetically conducting material, running outside the outermost permanent magnets, whereby the peripheral parts of the filter discs become free from fields.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7500195A SE387547B (en) | 1975-01-09 | 1975-01-09 | MAGNETIC FILTER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062624A true CA1062624A (en) | 1979-09-18 |
Family
ID=20323359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA243,058A Expired CA1062624A (en) | 1975-01-09 | 1976-01-05 | Rotary plate magnetic separator with edge keepers |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS51126573A (en) |
| BE (1) | BE836955A (en) |
| CA (1) | CA1062624A (en) |
| DE (1) | DE2557897A1 (en) |
| FI (1) | FI58725C (en) |
| FR (1) | FR2297085A1 (en) |
| GB (1) | GB1525071A (en) |
| IT (1) | IT1055751B (en) |
| SE (1) | SE387547B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0133869A3 (en) * | 1983-06-30 | 1985-06-19 | International Business Machines Corporation | Process for separating finely divided magnetic particles from a liquid |
| US5679249A (en) | 1991-12-24 | 1997-10-21 | Pall Corporation | Dynamic filter system |
| US6117322A (en) | 1993-06-23 | 2000-09-12 | Pall Corporation | Dynamic filter system |
| JP3325010B2 (en) | 2000-05-09 | 2002-09-17 | 株式会社プロジェクト・オーガン | Magnetic solid-liquid separator |
-
1975
- 1975-01-09 SE SE7500195A patent/SE387547B/en not_active IP Right Cessation
- 1975-12-22 DE DE19752557897 patent/DE2557897A1/en not_active Withdrawn
- 1975-12-22 BE BE163018A patent/BE836955A/en not_active IP Right Cessation
-
1976
- 1976-01-05 CA CA243,058A patent/CA1062624A/en not_active Expired
- 1976-01-07 FI FI760023A patent/FI58725C/en not_active IP Right Cessation
- 1976-01-07 JP JP51001348A patent/JPS51126573A/en active Pending
- 1976-01-08 GB GB620/76A patent/GB1525071A/en not_active Expired
- 1976-01-08 IT IT67024/76A patent/IT1055751B/en active
- 1976-01-08 FR FR7600342A patent/FR2297085A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2297085B1 (en) | 1982-04-02 |
| FI58725B (en) | 1980-12-31 |
| FI58725C (en) | 1981-04-10 |
| IT1055751B (en) | 1982-01-11 |
| BE836955A (en) | 1976-04-16 |
| DE2557897A1 (en) | 1976-07-15 |
| SE7500195L (en) | 1976-07-12 |
| JPS51126573A (en) | 1976-11-04 |
| FI760023A (en) | 1976-07-10 |
| SE387547B (en) | 1976-09-13 |
| FR2297085A1 (en) | 1976-08-06 |
| GB1525071A (en) | 1978-09-20 |
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