US2832471A - Magnetic separator - Google Patents
Magnetic separator Download PDFInfo
- 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
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- 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
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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
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- Manufacture And Refinement Of Metals (AREA)
- Sorting Of Articles (AREA)
Description
April 29, 1958 K. NEUMANN A. GoLTz ETAL 2,832,471
MAGNETIC SEPARATOR Filed Jan. 15, 1957 United States Patent 2,832,471 MAGNETIC SEPARATOR Arnold Goltz, Salzgitter-Gebhardshagen, and Kurt Neumann, Salzgitter-Bad, Germany, assignors to Erzbergban Salzgitter Aktiengesellschaft, Salzgitter-Bad, Germany Application January 15, 1957, Serial No. 634,343 Claims priority, application Germany June 8, 1956 2 Claims. (Cl. 209-219) 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.
In contrast to this substantial constructional simplification of the magnet frame is achieved according to the present invention in that the two staionary 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. In this way 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. Furthermore 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.
In one particular form of construction of the invention, 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. By means of these grooves, 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. Moreover 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 invention will be described further, by way of example, with reference to the accompanying drawing, which is a diagrammatic sectional elevation of one magnetic separator constructed in accordance with the invention.
On 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.
Above the intermediate core 3 is provided 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.
We claim:
1. 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.
2. A magnetic separator as set forth in claim 1, wherein said grooves are covered by a non-magnetic material.
References Cited in the file of this patent UNITED STATES PATENTS 641,148 Payne Jan. 9, 1900 832,822 Wait et al. Oct. 9, 1906 2,678,729 Spodig May 18, 1954 FOREIGN PATENTS 646,229 Germany June 10, 1937
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE12493A DE1146821B (en) | 1956-06-08 | 1956-06-08 | Magnetic roller separator |
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 (en) |
DE (1) | DE1146821B (en) |
FR (1) | FR1158335A (en) |
GB (1) | GB826685A (en) |
Cited By (1)
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)
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 (en) * | 1972-06-27 | 1974-01-24 | Spodig Heinrich | PERMANENT MAGNETIC SEPARATION DEVICE |
Citations (4)
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 (en) * | 1935-04-04 | 1937-06-10 | Fried Krupp Grusonwerk Akt Ges | Feeding device for drum and roller cutters |
US2678729A (en) * | 1950-12-12 | 1954-05-18 | Spodig Heinrich | Automatically operative magnetic separator |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE732133C (en) * | 1938-01-12 | 1943-02-22 | Karl Bechtold Dr Ing | Method and device for the magnetic processing of minerals u. Like. In the field gap between two magnetic poles and a rotating roller |
DE827181C (en) * | 1949-07-30 | 1952-01-07 | Georg Sengfelder | Magnetic separator |
DE1012872B (en) * | 1956-02-25 | 1957-08-01 | Erzbergbau Salzgitter Ag | Strong field magnetic separator with three-leg yoke |
-
1956
- 1956-06-08 DE DEE12493A patent/DE1146821B/en active Pending
- 1956-10-11 FR FR1158335D patent/FR1158335A/en not_active Expired
- 1956-10-29 GB GB32861/56A patent/GB826685A/en not_active Expired
-
1957
- 1957-01-15 US US634348A patent/US2832471A/en not_active Expired - Lifetime
Patent Citations (4)
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 (en) * | 1935-04-04 | 1937-06-10 | Fried Krupp Grusonwerk Akt Ges | Feeding device for drum and roller cutters |
US2678729A (en) * | 1950-12-12 | 1954-05-18 | Spodig Heinrich | Automatically operative magnetic separator |
Cited By (1)
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 |
---|---|
FR1158335A (en) | 1958-06-13 |
GB826685A (en) | 1960-01-20 |
DE1146821B (en) | 1963-04-11 |
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