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US2832471A - Magnetic separator - Google Patents

Magnetic separator Download PDF

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Publication number
US2832471A
US2832471A US634348A US63434857A US2832471A US 2832471 A US2832471 A US 2832471A US 634348 A US634348 A US 634348A US 63434857 A US63434857 A US 63434857A US 2832471 A US2832471 A US 2832471A
Authority
US
United States
Prior art keywords
magnetic
rollers
grooves
extraction
core
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 - Lifetime
Application number
US634348A
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English (en)
Inventor
Goltz Arnold
Neumann Kurt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ERZBERGBAU SALZGITTER AG
Original Assignee
ERZBERGBAU SALZGITTER AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ERZBERGBAU SALZGITTER AG filed Critical ERZBERGBAU SALZGITTER AG
Application granted granted Critical
Publication of US2832471A publication Critical patent/US2832471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B03C1/14—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets

Definitions

  • This invention concerns magnetic separators, and relates particularly to a separator having two rotating extraction rollers for the magnetic separation of granular materials, especially weakly magnetic ores, in which each extraction roller forms a pole of a magnet frame.
  • Magnetic separators of this type are known, in which there is associated with each extraction roller acting as the one pole of the magnet frame, a separate, stationary counter pole. Between these two poles there is arranged an air space through which passes the material to be separated.
  • the separate arrangement of a stationary counter pole for each extraction roller results in a disproportionately bulky shape of the magnet frame, which must hence, as a rule, be provided with a three-legged support.
  • the two staisty counter poles form a common centre or core for the poles constituted by the extraction rollers, which core is so arranged between the two extraction rollers as to form two air spaces for the passage of the material undergoing separation.
  • the two air spaces for the passage of the the material may be compactly arranged adjacent one another in a simple magnet frame, which, as compared with a separator having two adjacently disposed rollers without a stationary counter pole, has the advantage of presenting an effectively lengthier separating zone and hence a throughput capacity of the order of 50% higher.
  • the magnetic dispersion is reduced and hence also the excitation power required.
  • the intermediate core also makes it possible completely to isolate the magnetic neutral zone by the application of non-magnetic material (e. g. Remanit) to the surfaces facing the extraction rollers. Finally the tractive force which acts on the rollers, which under some circumstances can be very high, is compensated.
  • non-magnetic material e. g. Remanit
  • the intermediate core is provided with grooves on its two sides which face the extraction rollers, which grooves preferably extend parallel to the axis of the extraction rollers.
  • the convergence of the magnetic field can be considerably increased at one or more positions along the air spaces on both sides of the grooves; at the same time the induction on both sides of the grooves can be raised with constant magnetic flux.
  • the magnetic field is considerably attenuated at the positions of the grooves, themselves so that magnetic material which has already adhered to the extraction rollers, is once again loosened and re-arranged. In this way, non-magnetic particles which have perhaps been trapped are freed and thrown ofi, whereby an increased degree of separation and greater throughput capacity are attained.
  • the grooves of the intermediate core are preferably filled in or covered by non-magnetic material. Sticking of the material to be separated in the grooves and hence stopping up of the air passages for this material, are thereby avoided.
  • the magnet frame 1 which has an exciting coil not shown in the drawing, are arranged two extraction rollers 2, which rotate oppositely to one another and which in the usual way may be fluted. Between the two extraction rollers 2 is located a common centre or core 3, which constitute the counter poles to the poles formed by the rollers 2.
  • the intermediate core 3 is provided on its two sides which face the extraction rollers 2 with grooves 4, which are covered by means of a non-magnetic plate 5, e. g. of Remanit.
  • a housing 6 which is connected to a pressure air conduit 7.
  • the housing 6 is closed at the top in a roof-like manner, as by means of air-permeable plates 8.
  • the material to be separated falls on both sides of the housing 6 in the direction of the arrow X into the two air spaces 9, where separation takes place.
  • Non-magnetic separated material is led away in the direction of the arrow Y, whilst magnetic separated material is accumulated in the direction of the arrows Z.
  • a magnetic separator for granular material comprising a pair of mutually spaced, oppositely rotating extraction rollers, and a common magnetisable central core arranged between said rollers, the surfaces of the core facing said rollers conforming closely to the circumferential surfaces of the rollers themselves to form slitlike separation zones therewith, said core surfaces each having formed therein, at least one groove extending parallel to the axis of said extraction rollers and said core having its magnetic induction accompilshed by said rollers via said zones.

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  • Sorting Of Articles (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US634348A 1956-06-08 1957-01-15 Magnetic separator Expired - Lifetime US2832471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE12493A DE1146821B (de) 1956-06-08 1956-06-08 Magnetwalzenscheider

Publications (1)

Publication Number Publication Date
US2832471A true US2832471A (en) 1958-04-29

Family

ID=7068341

Family Applications (1)

Application Number Title Priority Date Filing Date
US634348A Expired - Lifetime US2832471A (en) 1956-06-08 1957-01-15 Magnetic separator

Country Status (4)

Country Link
US (1) US2832471A (de)
DE (1) DE1146821B (de)
FR (1) FR1158335A (de)
GB (1) GB826685A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394807A (en) * 1964-12-22 1968-07-30 Steinert Elecktromagnetbau Magnetic separating apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284556A (en) * 1963-01-25 1966-11-08 Louis E Hay Method for injection of transfer molding laminated pressure vessels
DE2231380A1 (de) * 1972-06-27 1974-01-24 Spodig Heinrich Permanentmagnetisches separiergeraet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US641148A (en) * 1897-01-20 1900-01-09 Clarence Q Payne Method of magnetically separating ores.
US832822A (en) * 1905-03-09 1906-10-09 Henry H Wait Magnetic ore-separator.
DE646229C (de) * 1935-04-04 1937-06-10 Fried Krupp Grusonwerk Akt Ges Aufgabevorrichtung fuer Trommel- und Walzenscheider
US2678729A (en) * 1950-12-12 1954-05-18 Spodig Heinrich Automatically operative magnetic separator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE732133C (de) * 1938-01-12 1943-02-22 Karl Bechtold Dr Ing Verfahren und Vorrichtung zur magnetischen Aufbereitung von Mineralien u. dgl. im Feldspalt zwischen zwei Magnetpolen und einer umlaufenden Walze
DE827181C (de) * 1949-07-30 1952-01-07 Georg Sengfelder Magnetscheider
DE1012872B (de) * 1956-02-25 1957-08-01 Erzbergbau Salzgitter Ag Starkfeld-Magnetscheider mit Dreischenkeljoch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US641148A (en) * 1897-01-20 1900-01-09 Clarence Q Payne Method of magnetically separating ores.
US832822A (en) * 1905-03-09 1906-10-09 Henry H Wait Magnetic ore-separator.
DE646229C (de) * 1935-04-04 1937-06-10 Fried Krupp Grusonwerk Akt Ges Aufgabevorrichtung fuer Trommel- und Walzenscheider
US2678729A (en) * 1950-12-12 1954-05-18 Spodig Heinrich Automatically operative magnetic separator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394807A (en) * 1964-12-22 1968-07-30 Steinert Elecktromagnetbau Magnetic separating apparatus

Also Published As

Publication number Publication date
GB826685A (en) 1960-01-20
DE1146821B (de) 1963-04-11
FR1158335A (fr) 1958-06-13

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