US815113A - Wet magnetic ore-separator. - Google Patents
Wet magnetic ore-separator. Download PDFInfo
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- US815113A US815113A US20865204A US1904208652A US815113A US 815113 A US815113 A US 815113A US 20865204 A US20865204 A US 20865204A US 1904208652 A US1904208652 A US 1904208652A US 815113 A US815113 A US 815113A
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- pole
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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
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
- B03C1/14—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
Definitions
- FRANCIS JA Mitre .UULING AFT ⁇ VILLIAM JAMIESON, OF MELBOURNE, Vl CTORIA, AUSTRA TlIA.
- This invention relates to an improvement in wet n'lagnctic ore separators whereby a web, wall, or connecting-link of water (here'- inafter called a water web) is created or formed in the magnetic fieldand into which water web the pulverized materials under treatment pass in order that the magnetic particles may be attracted by thepole or poles,while the non-magnetic particles pass
- a shield of non-magnetic material and which shield has a coating of water imparted to it and is arranged to lie above the chute,-table, or appliance by which the pulverized ore under treatment is fed to the magnetic field.
- Said water web is created and maintained (although the water is continuously fiowin obviouslyy attraction from the wetted or watercoated shield and partly by each attracted grain of ore carrying water with it, and hence said water-web constitutes an easy passage-way or conduit for the particles of ore capable of magnetic attraction which are in the pulverized oregrains flowing downin thewater on the chute or table.
- the pole or poles are placed at such a distance apart as not to touch or intercept the flow until the water web is formed and.main-' tained;
- I I v E 1s a launder to receive the waste water magnetic ore-separators, and;
- the upper poles A in the apparatus shown in Figs. 1 to 6 are'covered with a shield B, which is in the formof anendless V-shaped rubber band supported on small sheaves B;
- a'belt pulley B Said shield B is coated with 'water issuing vfrom a small" open ended vertical pipe 0, arranged just outside the magnetic field, and out of the upper end of said pipe the water slowly flows an adheres to the shield as it is passing into the magnetic field, wherein the water on the -.shield attracts the feed-water to form the water web D.
- the upper and lower poles A and A are shown of V shape,fand theymay be arranged horizontally or vertically opposite each other or nearly so, or, in fact, in any positionwhich will allow the-pulverized ore.
- I H and H areupper and lower-yoke-pieces carrying thepoles', I the core 'iece to the upper and lower ⁇ aces-of w-hic the okepieces are'secii'red, and J is the insulate cop- 10o per-wire bobbin.
- This formation of the water web may be created on any type of magnetic separator having the poles and feedetablesuitably situated for the purpose and with'one 'or both of 105 the poles fiilnish'ed with a shield, which is, wetted, as 'herein'before stated, or man alternati-ve the poles themselves may be-,ro-.
- Water web D may be created or formed-in the magnetic field.
- the poles A and A are cylindrical and caused to be rotated, the upper 5 pole having longitudinal strips of non-magnetic conducting material a onitssurlace, while the feed-table Eterminates at the side of the Water web D, which is formed between the poles.
- IO In the working of the apparatus shown in Figs.
- the pulverized ores are fed with water to the chute or table, and as the water web' D is created and maintained in the magnetic field it serves as a conveying medium for the magnetic mineral, which when attracted is retained against the shield until such time as the shield passes beyond the end of lower pole-piece, where the magnetic iield becomes weakened by reason of the formation of the upper poles with peaked prolongations P, and ,hence'the magnetized particles will leave or dro from the shield and follow the magnetic fie d to and upon the re volving disk G, nd in which transit they are aided bye water jet F playing'on the shield.
- the upperpart of the disk G and the parti' cles thereon are influenced by the upper pol e- F piece, while the lower part of the disk is inuen'eeel by the opposite polarity of the lower 3 pole-piece.
- the said magnetic particles will then be carried by the revolving disk until alley-are repelled by the reversal of the magnetic polarity in said disk, while any adhering particles will be swept oil by the water jet F.
- the magnetic mineral or particles will be carried by the up er pole to outside the magnetic field and t eres t be swept oil with a; water 4 jet, as beiore described.
- a magnetic separator the combination with a fieldirame having up or and lower poles extending horizontally, oih guiding-ta ble extending between. the poles, means for feeding a n'iixtnrc of water and the mate- 6o rial to be separated along said table and bclow the upper pole, an endless band of nonmagnetic material adj r nt to the face of the upper pole, means for r5 .ising a endless band to trave and means tor maintaining a water web between said traveling band and the poles.
- lower poles extending horizonta ly, of a supporting table or apron extending between the aces of the poles, means for causing a mixture of water and material to be separated to fiolv along said supporting-table toward the pole-faces, a band of non-1nagnetic material disposed adjacent to the face of the upper ole, means for causing said band to travel ongitudinully along said upper-pole face, means for maintaining a film or coating of water on said band, and means for maintaining a water web between said film and the water on said table, the magnetic particles being carried by said traveling film and delivered at the sides of the poles.
- a magnetic separator the combinetion with a held-frame having up or and lower poles extending longitudina ly and separated by an air-gap, of a guiding table or a ron extending through said gap and non! t is face of the, u ,per pole, means for feeding the material to e separated to said table, means for vibrating said table to cause the material thereon to be moved toward the upper-pole face, a band of non-magnetic material adjacent to'the upper-polc face, means for causing longitudinal travel of said band,
- the combinaeld-frame having upper and lower pole-pieces extending horizontally, said pole-pieces having I-shaped tips separated'.
- a magnetic separator the combination with a field-frame having upper and lower pole-pieces extending' horizontally, said- V-shapedti :5 separated ole-pieces .havin ap, 5 guiding -tab e extending through sai gap near the'tip of'the u per pole-piece, means. for maintaining a we of water between the upper-pole tip and said ta-.
- amagnetic separator the combination with a field frame havingupper and pole-pieces having V- lower ole-pieces, said shaped tipsseparated by an-alr-gap, a g'uid- .irlilg-table extending through said air-gap near at t of waterto travell longitudinally along-the ti e upper-pole tin, means .for causing affilm of the upper po means for vibrating said table to cause-the particles thereon traveling film whereby the magnetic particles are attracted by the upper pole-piece and by said traveling film.
- a magnetic separator In a magnetic separator, the combination'with a field-frame having pole-pieces extending horizontally, said pole-pieces having V-shaped tips separated by a suitable air gap, of a guiding-table extending throughsaid air-gap near said up er-pbole, tip, a bandof non-magnetic Inateria em racing'the end of the upper-pole tip, means for causing said band to travel longitudinally along said upper-pole tip, means for maintaining a film of means for feeding Ward said film whereb tic les are attracted by the upper pole-piece and conveyed away to be delivered byvirtue with said band. 14.
- a magnetic separator In a magnetic separator, the combination-with a fieldframe having upper and ole-pieces, said ole-pieces having V- shaped ti s separated ya suitable air gap, of a guid ing 'table extending y the magnetic partips separatedby an air-gap. of a through said air-gap near the upper-pole: t p, a band embracing the end of the .u perelpole tip and adaptedto' travel. longitu mal y along said tip, means for maintainingafilm of water on said band, means for feeding amixture of water and material to be separated. to said table,
- the combina- -frame'liavin pole-pieces extendmg-horizontally, said 0 e+pieces having gap,.a-guiding-ta leexten i'ng near the upper-pole tip, -a band of non-magnetic material embracing the point of the uppere'pole tip, means for causing said band to/travel I p longitudinally along said-pole-tip,' /m,eans for e-piece, means for feedin a material to be separated to saidftable, an
- a. magnetic separator the combinetlon with a field-fran1e having an upper and lower pole-place extending horizontally, smd pole-pieces having ⁇ i-sha.ped tips separated by asultable air-gap, e guiding-table extending. near the upper-pole tip, a band of nonmagnetic. material embracing the point of the upperpole tipmid adapted to travel longitu dinnlly along said tip, means for feeding mixture oi water and material to he sepe; rated to said table and toward said hand,
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- Water Treatment By Electricity Or Magnetism (AREA)
Description
No. 315,113. PATENTED MAR.13, 1906.
IF. ,J- ODLING & w. JAMIBSON. WET MAGNETIC ORE SEPARATOR;
I APPLICATION FILED MAY l 1904.
' 6L I 2 sums-$115521? 1.
' j 1 i I 1 "H3 3 4 I 3 B J: v
F I: v I if if? L ifl r- I LU L; j Y 4B2 I I Inventoni 32 Witnesses" Z1292 William Jamicson {a i u -1f5-anczs Jams will)?! 1 Attafngy To all, whom it may cnlwern:
. UNITED sTATES PATENT OFFICE.
FRANCIS JA Mitre .UULING AFT) \VILLIAM JAMIESON, OF MELBOURNE, Vl CTORIA, AUSTRA TlIA.
WET .MAGNE'TIC o E-sEPARAToR.
Specification of Letters Patent.
Patented Math 1 3;-1eoe.
Application filed May 19, 1904. Serial'No. 203,652;
Be it known that we, FRAXCIS JAMES 01) ILING, mining engineer, residing at No. 2
Princes Walk, Pl'llH'PS llridgc, and WVILLIAM. "JAMIESON, gen t] rm an. 'l'CSldlIlg at Broken H111 Chambers, N o. .31 Queen street, Melbourne,
in the British Sum of Victoria Common- .wealth of Australia, subjects of the King of partly by capi Great Britain and Ireland, have invented a new and useful lmpr()\ 'en'1e1it in Wet Magnetic Ore-Separators, of which the following is a specification.
This invention relates to an improvement in wet n'lagnctic ore separators whereby a web, wall, or connecting-link of water (here'- inafter called a water web) is created or formed in the magnetic fieldand into which water web the pulverized materials under treatment pass in order that the magnetic particles may be attracted by thepole or poles,while the non-magnetic particles pass To produce the both of the poles with a shield of non-magnetic material, and which shield has a coating of water imparted to it and is arranged to lie above the chute,-table, or appliance by which the pulverized ore under treatment is fed to the magnetic field. Said water web is created and maintained (although the water is continuously fiowin iary attraction from the wetted or watercoated shield and partly by each attracted grain of ore carrying water with it, and hence said water-web constitutes an easy passage-way or conduit for the particles of ore capable of magnetic attraction which are in the pulverized oregrains flowing downin thewater on the chute or table.
The pole or poles are placed at such a distance apart as not to touch or intercept the flow until the water web is formed and.main-' tained;
' In order that the invention may be well understood, it will now be described aided by a reference, to the accompanying'sheets of drawings, which show how the watei web is created-in wet in whichc Figure 1 is a front view, and Fig. 2, a plan, ofa magnetic se arator, while Fig. 3 is aver,
tical section on ine a a, Fig. 1. 'Figs. 4 and.
- 5 are detail sections of the poles, the former Showing the water-pipe wetting the shielddown the chute or table) piece. I I v E 1s a launder to receive the waste water magnetic ore-separators, and;
and the latter the water web created between tive the water web formed between circular 6o poles. y I
The upper poles A in the apparatus shown in Figs. 1 to 6 are'covered with a shield B, which is in the formof anendless V-shaped rubber band supported on small sheaves B;
and to one of each set of sheaves motion is imparted by a'belt pulley B Said shield B is coated with 'water issuing vfrom a small" open ended vertical pipe 0, arranged just outside the magnetic field, and out of the upper end of said pipe the water slowly flows an adheres to the shield as it is passing into the magnetic field, wherein the water on the -.shield attracts the feed-water to form the water web D. The upper and lower poles A and A are shown of V shape,fand theymay be arranged horizontally or vertically opposite each other or nearly so, or, in fact, in any positionwhich will allow the-pulverized ore.
to be fed in water onto a table E, to which a percussive or. vanning motion is given by any. well-known mechanical means, as by aicran movement K, and'said table passes under the shield-covered pole A, so that the aforesaid from a brew et be ted'to the lower poleand non-magnetic materials, and F and F are'water-jets operatin .on'a sheathed disk G.
In place of the ru her-band shield-Ba brass or other non-magnetictraveling shield o 5 may be employed. I H and H areupper and lower-yoke-pieces carrying thepoles', I the core 'iece to the upper and lower {aces-of w-hic the okepieces are'secii'red, and J is the insulate cop- 10o per-wire bobbin. v
This formation of the water web may be created on any type of magnetic separator having the poles and feedetablesuitably situated for the purpose and with'one 'or both of 105 the poles fiilnish'ed with a shield, which is, wetted, as 'herein'before stated, or man alternati-ve the poles themselves may be-,ro-.
Water web D may be created or formed-in the magnetic field. Table E-i's shown rovided with a'feed hopper e, and the tab e is carried by s rinPgJ-sup 'orts E, projecting up tated or'reciprocated, and insuch case a shield is not necessary. For instance, as shown in Fig. 7 the poles A and A are cylindrical and caused to be rotated, the upper 5 pole having longitudinal strips of non-magnetic conducting material a onitssurlace, while the feed-table Eterminates at the side of the Water web D, which is formed between the poles. IO In the working of the apparatus shown in Figs. 1 to 6 the pulverized ores are fed with water to the chute or table, and as the water web' D is created and maintained in the magnetic field it serves as a conveying medium for the magnetic mineral, which when attracted is retained against the shield until such time as the shield passes beyond the end of lower pole-piece, where the magnetic iield becomes weakened by reason of the formation of the upper poles with peaked prolongations P, and ,hence'the magnetized particles will leave or dro from the shield and follow the magnetic fie d to and upon the re volving disk G, nd in which transit they are aided bye water jet F playing'on the shield. The upperpart of the disk G and the parti' cles thereon are influenced by the upper pol e- F piece, while the lower part of the disk is inuen'eeel by the opposite polarity of the lower 3 pole-piece. The said magnetic particles will then be carried by the revolving disk until alley-are repelled by the reversal of the magnetic polarity in said disk, while any adhering particles will be swept oil by the water jet F. Again, when cylindrical revolving poles are employed, as is shown in Fig. 7, the magnetic mineral or particles will be carried by the up er pole to outside the magnetic field and t eres t be swept oil with a; water 4 jet, as beiore described.
Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is
1. in a magnetic separator, the combine tion with a field-frarne having 0 posed poles extending horizontally, of'a tab e extending between said poles, means for feeding a mixture of water and the material to be separated to said table to flow below the upperpole, a
' 5o band of non-magnetic material adapted to travel horizontally and adjacent to the face of the upper pole, and means for maintaining a water wcb'between saidnonnnagncticband and said table.
2. In a magnetic separator, the combination with a fieldirame having up or and lower poles extending horizontally, oih guiding-ta ble extending between. the poles, means for feeding a n'iixtnrc of water and the mate- 6o rial to be separated along said table and bclow the upper pole, an endless band of nonmagnetic material adj r nt to the face of the upper pole, means for r5 .ising a endless band to trave and means tor maintaining a water web between said traveling band and the poles.
said table, the magnetic particles being carried by said web to be delivered at the side of etic separator, the combinaeld-l rame havin upper and 3. In a ma tion with, a
"lower poles extending horizonta ly, of a suporting table or apron extending between the aces of the poles, means for causing a mixture of water and material to be separated to fiolv along said supporting-table toward the pole-faces, a band of non-1nagnetic material disposed adjacent to the face of the upper ole, means for causing said band to travel ongitudinully along said upper-pole face, means for maintaining a film or coating of water on said band, and means for maintaining a water web between said film and the water on said table, the magnetic particles being carried by said traveling film and delivered at the sides of the poles.
4. In a magnetic separator, the combinetion with a held-frame having up or and lower poles extending longitudina ly and separated by an air-gap, of a guiding table or a ron extending through said gap and non! t is face of the, u ,per pole, means for feeding the material to e separated to said table, means for vibrating said table to cause the material thereon to be moved toward the upper-pole face, a band of non-magnetic material adjacent to'the upper-polc face, means for causing longitudinal travel of said band,
and means for maintaining a film of water. on
said traveling band, the magnetic material.
being received by said film and carried thereby to'be delivered at the side of the poles.
5-. in iagnctlc separator, the combination with a licld-freme having an upper and slower pole-piece extending horizontall and separated by an air-ga means for causing a film of water to trave longitudinally along the face of the upper pole-piece, a supporting table or apron extending through said airgap near the up er-pole face, means for feedmg material to e separated to saidtable or apron, and means for vibrating said table to cause the material-to move toward the upperpole face, the magnetic particles of the material beinr attracted by the upper pole and conveys by the traveling water film thereon .to be delivered at thc'sidc of the ole-piece. 1
gap, of a supporting-table extending through said air-gap near one pole, rmjlans-for feeding material to be separated to said table and toward said poleimeans for maintainnjig a water web between said pole and said table, and
- means for causing said water web to travel whereby the magnetic particles are attracted by said pole and conveyed by said traveling' v said gap near :one pole, means for causing 9. In a ma .1 tion with 1&1 2o
- through said air-gapnear the tip of the 11 per and toward said pole, said film and water co operatlng to form a Web between said pole and table, the. magnetic articles being a' tracted by said pole an conveyed by said traveling film and Web to the-side of the pole to be delivered.
netic separator, the combinaeld-frame having upper and lower pole-pieces extending horizontally, said pole-pieces having I-shaped tips separated'.
y an airgap,- a guidingtab e extending pole-piece, means for feeding a'mixture o wa:
- and toward the ter andmaterial to be separated to said table for maintainingatravelingfilmofwater along said upper-pole .tip, said film and the water on the table cotiperating 'to'form a thin. web
between said pole-tip and the table, the magnetic partieles"bsing attracted by the'upper pole andconveyed by thetraveling film to be delivered'.
10. In a magnetic separator,, the combination with a field-frame having upper and lower pole-pieces extending' horizontally, said- V-shapedti :5 separated ole-pieces .havin ap, 5 guiding -tab e extending through sai gap near the'tip of'the u per pole-piece, means. for maintaining a we of water between the upper-pole tip and said ta-.
I {longitudinally for feeding material to water web whereb the ble, means for causing said web to'travel along the upper-pole ti means be separatetf table, and means for vibratingsaid table to cause the material to be conveyed toward the magnetic particles are attracted by t e upper pole-plece and 1 conveyed away conveyed by the traveling-water. web to be delivered. 4
11. In amagnetic separator, the combination with a field frame havingupper and pole-pieces having V- lower ole-pieces, said shaped tipsseparated by an-alr-gap, a g'uid- .irlilg-table extending through said air-gap near at t of waterto travell longitudinally along-the ti e upper-pole tin, means .for causing affilm of the upper po means for vibrating said table to cause-the particles thereon traveling film whereby the magnetic particles are attracted by the upper pole-piece and by said traveling film.
12, In a magnetic separatolythe combinamaterial to be-separated. to said table upper-pole tip, and means; water on said band, and
. material to be separated to said table and to- --ofthe film traveling lower to said tion with a 01 .iV-shaped tips se arated to be conveyed toward said tion with a field-frame having upper and lower ole-pieces, said pole-pieces having V- sha e guiding-table extending through sa1d gap near the upper-pole tip, a band adapted to embraee the point of the upper-pole tip, means for causing said band to travel longi- .tudinally along said ole-tip, means for suplying water to sai band whereby a thin m is formed thereon, and means for feeding material to be separated to said table and to- 'ward said film whereby the magnetic par-' ticles are attracted by the upper pole-plece and conveyed away by .virtue of said traveling film.
- 13. In a magnetic separator, the combination'with a field-frame having pole-pieces extending horizontally, said pole-pieces having V-shaped tips separated by a suitable air gap, of a guiding-table extending throughsaid air-gap near said up er-pbole, tip, a bandof non-magnetic Inateria em racing'the end of the upper-pole tip, means for causing said band to travel longitudinally along said upper-pole tip, means for maintaining a film of means for feeding Ward said film whereb tic les are attracted by the upper pole-piece and conveyed away to be delivered byvirtue with said band. 14. In a magnetic separator, the combination-with a fieldframe having upper and ole-pieces, said ole-pieces having V- shaped ti s separated ya suitable air gap, of a guid ing 'table extending y the magnetic partips separatedby an air-gap. of a through said air-gap near the upper-pole: t p, a band embracing the end of the .u perelpole tip and adaptedto' travel. longitu mal y along said tip, means for maintainingafilm of water on said band, means for feeding amixture of water and material to be separated. to said table,
and toward said film, .sa1d film and water co- 0 erating to form a traveling. web between, t e upper-pole tip. and said table, the magnetic'particles bemg attraeted by said up er poleiece and conveyed away to be deli ered y virtue of said traveling web. v -1'5. In a'ma' tie se arator, the combina- -frame'liavin pole-pieces extendmg-horizontally, said 0 e+pieces having gap,.a-guiding-ta leexten i'ng near the upper-pole tip, -a band of non-magnetic material embracing the point of the uppere'pole tip, means for causing said band to/travel I p longitudinally along said-pole-tip,' /m,eans for e-piece, means for feedin a material to be separated to saidftable, an
supplymg water to said band whereby a thin' film is formed thereon, and means for feeding almi'xture of water and material to be sepa-- -sa1dr film and water cooperating to form a travelin water web between said pole-tip and'said table whereby the magnetic articles are attracted by the upper pole-piece a suitable air-.
. 5 rated to saidtable and toward said band,
and conveyed to one end thereof by virtue of v the traveling web.
- tip, a
- for feeding-materiel to table and toward said bend w 16. In as magnetic separator, the combination with a field-Tame having upper and of whereby the magnetic particles ere released and delivered.
- 17. In a. magnetic separator, the combinetlon with a field-fran1e having an upper and lower pole-place extending horizontally, smd pole-pieces having \i-sha.ped tips separated by asultable air-gap, e guiding-table extending. near the upper-pole tip, a band of nonmagnetic. material embracing the point of the upperpole tipmid adapted to travel longitu dinnlly along said tip, means for feeding mixture oi water and material to he sepe; rated to said table and toward said hand,
means in? supplying water to said hand wherel a thln film is formed thereon, to
travel therewith, said film ooopersting with the water on said table to sense :1. thin Web between said pole-tip and said table to travel longitudinally across the table, the magnetic psrtieles being attracted by the upper {)Olwvieee and conveyed by said traveling web to the end of the pole p e and means for dinitinishing the a-ttine .ivo influence at the end of the pole-piece whereby the nmgnetic pmtioles are released to he deli In witness \YllOl'LOlf we lm ve hereunto set our hands in presence oi two witnesses.
FRANCIS JAM I .ls
Witnesses:
BF'nmcm'm' Bomoomx,
. J. S. THOMPSON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20865204A US815113A (en) | 1904-05-19 | 1904-05-19 | Wet magnetic ore-separator. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20865204A US815113A (en) | 1904-05-19 | 1904-05-19 | Wet magnetic ore-separator. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US815113A true US815113A (en) | 1906-03-13 |
Family
ID=2883594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US20865204A Expired - Lifetime US815113A (en) | 1904-05-19 | 1904-05-19 | Wet magnetic ore-separator. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US815113A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585668A (en) * | 1946-04-12 | 1952-02-12 | Gen Electric | Magnetic hardness testing and sorting |
| US4157955A (en) * | 1976-03-26 | 1979-06-12 | Heinrich Spodig | Magnetic separator |
| US4273646A (en) * | 1977-08-04 | 1981-06-16 | Heinrich Spodig | Magnetic separator having intersecting conveyor belts |
-
1904
- 1904-05-19 US US20865204A patent/US815113A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585668A (en) * | 1946-04-12 | 1952-02-12 | Gen Electric | Magnetic hardness testing and sorting |
| US4157955A (en) * | 1976-03-26 | 1979-06-12 | Heinrich Spodig | Magnetic separator |
| US4273646A (en) * | 1977-08-04 | 1981-06-16 | Heinrich Spodig | Magnetic separator having intersecting conveyor belts |
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