EP0006885B1 - Magnetscheider mit sich kreuzenden Förderbändern - Google Patents

Magnetscheider mit sich kreuzenden Förderbändern Download PDF

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Publication number
EP0006885B1
EP0006885B1 EP78900076A EP78900076A EP0006885B1 EP 0006885 B1 EP0006885 B1 EP 0006885B1 EP 78900076 A EP78900076 A EP 78900076A EP 78900076 A EP78900076 A EP 78900076A EP 0006885 B1 EP0006885 B1 EP 0006885B1
Authority
EP
European Patent Office
Prior art keywords
belt
discharge
pole
soft
belts
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
Application number
EP78900076A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0006885A1 (de
Inventor
Heinrich Dr.-Ing. Spodig
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0006885A1 publication Critical patent/EP0006885A1/de
Application granted granted Critical
Publication of EP0006885B1 publication Critical patent/EP0006885B1/de
Expired 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
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B03C1/22—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with non-movable magnets

Definitions

  • the present invention relates to a magnetic separator with intersecting conveyor belts, the lower belt for transporting the material to be separated and at least one upper belt serving as a discharge belt for the separated material and two soft iron pole pieces are provided which form the working gap and are magnetized in the opposite direction by a magnet system , wherein one pole piece is arranged below the upper run of the lower band and the other pole piece is arranged above the discharge belt and wherein the pole piece arranged under the lower belt has at least one large-area pole surface and the pole piece arranged above the discharge belt has at least a smaller one, concentrating the magnetic flux has in the longitudinal direction of the discharge belt extending pole face.
  • a magnetic separator of this type has become known from US Pat. No. 2,591,121. Horseshoe-shaped electromagnets are used, the soft iron pole pieces of which have a special shape to improve the discharge performance.
  • magnetic separators for separating substances of different magnetic excitability using intersecting means of transportation have become known, for example, from DE-C - 180 923.
  • Magnetically influenced drums are arranged transversely to the feed belt. In such a system, the separation performance is relatively low because of the large stray field losses that cannot be avoided.
  • the aim of the invention is to largely reduce the stray field losses of the known systems in magnetic separators with intersecting conveyor belts and in this way to achieve better efficiencies, while at the same time simplifying the known electromagnet systems by a closed permanent magnet system.
  • the magnet system consists of two frames, each of which encloses the upper run of the lower belt, one on the left and the other on the right side of the discharge belt, and that the frame consists of two symmetrical halves of alternately successive Permanent magnets and soft iron parts exist, the frames thus formed being connected by means of two soft iron pole pieces of opposite polarity arranged between the upper and lower runs of the strips.
  • the frame of one of the permanent magnets is provided in each corner region and the adjacent corners are connected to the frame halves by soft iron intermediate pieces and these halves are connected to one another by further soft iron intermediate pieces, which in turn are connected to one another by the soft iron pole pieces.
  • Known double yoke systems (FR - A - 20 78 930) consist of two U-shaped permanent magnets with interposed soft iron pole pieces, the poles of which are drawn inwards to form the working gap.
  • the working gap is transverse to the direction of magnetization, which leads to increased magnetic scatter within the frame. This disadvantage is avoided by the specified connection of two frames.
  • pole areas can be assigned to the individual discharge belts.
  • the large-area pole areas expediently have prismatic, the smaller pole areas wedge-shaped cross sections.
  • the wedge-shaped cross sections in the case of discharge belts lying next to one another or the latter themselves are advantageously arranged at different heights above the upper run of the lower belt.
  • the magnetic separator consists of a closed permanent magnetic circuit arrangement and an endless conveyor belt 1 for the material to be separated and three endless discharge belts 2, 3, 4 for the removal of the separated material, which run in a direction transverse to the conveyor belt 1.
  • the magnetic circuit arrangement consists of frames arranged on both sides of the discharge belts 2, 3, 4, each consisting of the frames connected by the soft iron parts 5, 6 and 7, 8 ' Block magnets 9,10; 11.12 and 13.14; 15,16 as well as the soft iron intermediate pieces 17,18 and 19,20.
  • the frames are connected to one another by pole pieces 21, 22, which are each firmly connected to the intermediate pieces 17, 19 and 18, 20 in a magnetically highly conductive manner, the intermediate pieces 17, 19 and 18, 20 being located at a distance from one another is sufficient for the passage of the conveyor belt 1 and the discharge belts 2, 3, 4.
  • the polarities of the block magnets 9, 10 follow within the closed frame; 11.12 and 13.14; 15, 16 in such a way that the intermediate pieces 18 and 20 are induced with a multiple N polarity and the intermediate pieces 17 and 19 with a multiple S polarity or vice versa. This creates a strong, concentrated magnetic field between the pole pieces 21, 22 in the passage area of the bands 1, 2, 3, 4.
  • the pole piece 22 is divided into wedge-shaped cross sections 23, while the pole piece 21 located opposite the upper run of the conveyor belt 1 has corresponding prismatic cross sections 24.
  • the magnetic field is concentrated at the tips of the wedge-shaped cross sections 23 in such a way that the iron parts contained in the material to be separated transported by conveyor belt 1 only jump in the magnetic field in the direction of the tips and thereby from the discharge belts 2, 3, 4 the magnetic field are transported out and separated.
  • the conveyor belt 1 is loaded with material to be separated via the funnel 25.
  • a special configuration of the pole piece 22 still consists in providing the wedge-shaped cross sections 23 at different heights and, accordingly, the discharge belts 2, 3, 4.
  • the wedge-shaped cross sections 23 are arranged such that the distance of the wedge-shaped cross sections 23 from the conveyor belt 1 decreases in the running direction of the conveyor belt 1.
  • a rough separation takes place in the first, a finer separation in the second and a finest separation in the third.

Landscapes

  • Sorting Of Articles (AREA)
  • Belt Conveyors (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Liquid Crystal (AREA)
EP78900076A 1977-08-04 1978-07-07 Magnetscheider mit sich kreuzenden Förderbändern Expired EP0006885B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2735150 1977-08-04
DE2735150A DE2735150C2 (de) 1977-08-04 1977-08-04 Kreuzband-Magnetscheider

Publications (2)

Publication Number Publication Date
EP0006885A1 EP0006885A1 (de) 1980-01-23
EP0006885B1 true EP0006885B1 (de) 1981-07-01

Family

ID=6015620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78900076A Expired EP0006885B1 (de) 1977-08-04 1978-07-07 Magnetscheider mit sich kreuzenden Förderbändern

Country Status (18)

Country Link
US (1) US4273646A (xx)
EP (1) EP0006885B1 (xx)
JP (1) JPS5448380A (xx)
AT (1) AT362735B (xx)
BE (1) BE869082R (xx)
CH (1) CH625138A5 (xx)
DD (1) DD137534A5 (xx)
DE (1) DE2735150C2 (xx)
DK (1) DK369377A (xx)
ES (1) ES472364A1 (xx)
FI (1) FI772477A (xx)
GB (1) GB2021000B (xx)
IT (1) IT1109977B (xx)
NL (1) NL7808177A (xx)
NO (1) NO772902L (xx)
PL (1) PL208827A1 (xx)
SE (1) SE7709181L (xx)
WO (1) WO1979000085A1 (xx)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2915192A1 (de) * 1979-04-10 1980-10-30 Spodig Heinrich Permanentmagnetischer stromerzeuger
US6899230B2 (en) * 2000-11-20 2005-05-31 Magnetic Torque International, Ltd. Apparatus and method for isolating materials
WO2008089060A1 (en) * 2007-01-12 2008-07-24 Nu-Iron Technology, Llc System and method for cooling and removing iron from a hearth
WO2012074692A1 (en) 2010-11-09 2012-06-07 Eriez Manufacturing Co. Process for improving the quality of separated materials in the scrap metal industry
JP5892670B2 (ja) * 2012-03-28 2016-03-23 国立研究開発法人産業技術総合研究所 磁選機
CN104722399A (zh) * 2015-01-22 2015-06-24 包头市金蒙汇磁材料有限责任公司 一种分离稀土永磁材料中杂质的磁选机
US10758918B2 (en) * 2016-04-26 2020-09-01 DRP Ventures Inc. Method and apparatus for cleaning a machine employing permanent magnets to remove ferrous metals from a flow of material
CA2965077A1 (en) * 2016-04-26 2017-10-26 DRP Ventures Inc. Method and apparatus for cleaning a machine employing permanent magnets to remove ferrous metals from a flow of material

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US825672A (en) * 1906-07-10 Imp Ore Separator Company Magnetic ore-separator.
US750594A (en) * 1904-01-26 Magnet
US815113A (en) * 1904-05-19 1906-03-13 Francis James Odling Wet magnetic ore-separator.
US1068453A (en) * 1912-12-12 1913-07-29 Wetherill Separating Company Magnetic separator.
US1130648A (en) * 1913-11-25 1915-03-02 Krupp Ag Grusonwerk Magnetic separator.
US1490792A (en) * 1921-05-11 1924-04-15 Woodworth Leon Byron Magnetic separator
US1565038A (en) * 1924-12-19 1925-12-08 Krupp Ag Grusonwerk Zone pole for magnetic separators
GB251821A (en) * 1925-08-18 1926-05-13 Arthur Davies Improvements in machinery for the electro magnetic separation of ores
US2591121A (en) * 1947-05-10 1952-04-01 Dings Magnetic Separator Co Crossbelt magnetic separator
US2591122A (en) * 1947-12-03 1952-04-01 Dings Magnetic Separator Co Crossbelt magnetic separator
US2724504A (en) * 1953-02-19 1955-11-22 Dings Magnetic Separator Co Cross-belt magnetic separator
GB724621A (en) * 1953-06-29 1955-02-23 Spodig Heinrich Improvements relating to a permanent magnetic separating apparatus
US3042205A (en) * 1958-05-19 1962-07-03 Robert F Merwin Magnetic separator with magnetic rubber element
AT315529B (de) * 1970-02-24 1974-05-27 Boehler & Co Ag Geb Luftspaltmagnetsystem
US3948764A (en) * 1974-09-23 1976-04-06 Browning-Ferris Industries, Inc. Catalyst screening unit
DE2607197C3 (de) * 1976-02-23 1979-09-20 Heinrich Dr.-Ing. 4714 Selm Spodig Unabgeschirmtes dauermagnetisches Doppeljochsystem
DE2612834A1 (de) * 1976-03-26 1977-09-29 Spodig Heinrich Magnetscheider

Also Published As

Publication number Publication date
EP0006885A1 (de) 1980-01-23
DE2735150A1 (de) 1979-02-15
AT362735B (de) 1981-06-10
NL7808177A (nl) 1979-02-06
DD137534A5 (de) 1979-09-12
US4273646A (en) 1981-06-16
NO772902L (no) 1979-02-06
JPS5448380A (en) 1979-04-16
FI772477A (fi) 1979-02-05
SE7709181L (sv) 1979-02-05
PL208827A1 (pl) 1979-05-07
IT7826500A0 (it) 1978-08-04
GB2021000A (en) 1979-11-28
ATA536178A (de) 1980-11-15
GB2021000B (en) 1982-06-03
CH625138A5 (xx) 1981-09-15
WO1979000085A1 (en) 1979-02-22
DE2735150C2 (de) 1985-10-17
DK369377A (da) 1979-02-05
ES472364A1 (es) 1979-04-01
BE869082R (fr) 1978-11-16
IT1109977B (it) 1985-12-23

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