EP2206558A1 - Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten - Google Patents
Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten Download PDFInfo
- Publication number
- EP2206558A1 EP2206558A1 EP10155597A EP10155597A EP2206558A1 EP 2206558 A1 EP2206558 A1 EP 2206558A1 EP 10155597 A EP10155597 A EP 10155597A EP 10155597 A EP10155597 A EP 10155597A EP 2206558 A1 EP2206558 A1 EP 2206558A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnet
- liberated
- scrap
- magnetic field
- fragments
- 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.)
- Granted
Links
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000926 separation method Methods 0.000 title claims abstract description 31
- 239000012634 fragment Substances 0.000 title abstract description 15
- 238000000034 method Methods 0.000 title abstract description 10
- 230000003068 static effect Effects 0.000 title abstract description 4
- 230000005291 magnetic effect Effects 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 229910052802 copper Inorganic materials 0.000 description 28
- 239000010949 copper Substances 0.000 description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 25
- 229910000831 Steel Inorganic materials 0.000 description 20
- 239000010959 steel Substances 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000006187 pill Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 206010011906 Death Diseases 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 239000002907 paramagnetic material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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 process and device for the separation of fragments of liberated ferrous scrap from not liberated ferrous scrap fragments by means of a static magnet.
- the present invention relates to the dramatic reduction of the copper content in liberated ferrous scrap in particular in steel scrap.
- Steel scrap is produced, among others, from end-of-life consumer products, such as cars as well as electric and electronic appliances at car shredders and waste from energy plants.
- liberated scrap means fragments which essentially do not contain materials other than iron and steel.
- not liberated ferrous scrap refers to fragments containing other materials in particular copper.
- ferrous scrap obtained from shedders contain both liberated and not liberated scrap. This "shredder steel scrap", obtained according to the prior art separation methods, is sold to steel manufacturers to be re-melted and processed into new steel products.
- the threshold value of copper in steel scrap set by steelmakers has gone down from 0.25 wt-% to 0.2 wt-%.
- the amount of copper containing parts in steel scrap has substantially risen, up to about 20 wt-%, as a result of design changes of durable consumer goods and passenger vehicles.
- the liberated ferrous scrap fragments are separated from the not liberated ferrous scrap fragments by means of a static magnet wherein a mixture of said liberated ferrous and not liberated ferrous fragments is fed to a continuous conveyor belt which is driven around drums and wherein said magnet is fixed in the drum distant from the feeding point.
- Said magnet is attracting liberated ferromagnetic material towards the belt as it passes around the drum, which device comprising a plurality of magnet poles extending around the interior of the drum for substantially 180°, wherein the uppermost pole being positioned at an angle of at least 15° to the vertical through the axis of the drum in the direction of belt travel.
- the speed of the conveyor belt may not exceed 500 feet per minute (150 m/s).
- WO 88/05696 discloses a process for separating magnetic ore particles from non-magnetic particles using a short belt magnetic separator having a pulley head with axial pole permanent magnets located within said pulley head, said magnets being mounted in a fixed position within said pulley head during operation of said separator.
- Said axial pole magnets within the pulley head are positioned so that said magnets extend along an arc beginning at a location spaced at least one degree beyond the point of tangency T of an upper surface of the belt with the pulley head.
- US-A-3,057,477 relates to an apparatus for the sorting of tablets or pills which include a core of magnetically susceptible or paramagnetic material contained within an outer coating or shell. It is the object of US-A-3,057,477 to sort out pills having comprised therein a core of traceable small quantities of paramagnetic or magnetically susceptible material as opposed to pills without such a core.
- US-A-3,057,477 employs a conveyor belt over which the pills are transported whereby at the end of the conveyor belt a magnetic field is applied which is established by placing electrical coils that are provided with pole pieces next to the belt and adjacent thereto. The resulting magnetic field lines follow therefore a path transverse to the conveying direction of the belt.
- EP-A-0 455 948 shows a separating device for separating weakly magnetisable material from non-magnetisable material which is fed in a mixture at a feeding point to a continuous belt driven around drums for the transportation of the mixture to a separation zone.
- magnetic field lines of a magnet are present, and the magnet to be employed therefore is required to be strong in order to attract the weakly magnetisable materials such as steel-qualities that are normally not magnetisable but may have become weakly magnetisable by mechanical agitation resulting in a transition of the steel-structure from austenite to martensite.
- EP-A-0 455 948 is however not concerned with the separation of strongly magnetisable materials such as iron, nickel and nickel alloys.
- the present invention relates to a process and device for the separation of liberated ferrous scrap fragments from not liberated ferrous scrap fragments by using a single magnet rather than a plurality of magnets from the above discussed prior art, wherein said magnet is fixed in the drum distant from the feeding point, having magnetic field lines in the separation zone which are predominantly parallel to the belt surface.
- the invention also relates to a device for the separation of fragments of liberated ferrous scrap from not liberated ferrous scrap in a separation zone, which device is provided with a first drum and a second drum and a continuous belt for the transportation of a mixture of liberated and not liberated scrap to the separation zone, wherein said magnet is a dipole magnet in the drum distant from the feeding point.
- Said dipole magnet is cylindrical and furthermore the position of said magnet in the drum is such that the magnetic field lines are predominantly parallel to the surface of said belt.
- the copper content of the feed is 1.5 wt-%.
- the parallel orientation of the magnetic field line gives the best result relating to a copper content of the recovered steel fraction, i.e. only about 0,18 wt-% copper versus iron recovery of about 82.9 wt-%.
- the copper content of the copper-rich fraction obtained by the centrifugal forces is about 8.0 wt-% versus about 17.1 wt-% iron recovery in the parallel orientation of the magnetic field lines.
- the Figure shows the preferred embodiment of the device 1 of the invention for the separation of fragments of liberated ferrous scrap from not liberated ferrous scrap.
- the liberated and not liberated scrap mixture is fed to the continuous conveyor belt 4 at drum 2 for the transportation of said scrap mixture with a belt speed of 2 to 5 m/s, preferably 3 to 4 m/s, and most preferably 3.5 m/s to the separation zone 6.
- a belt speed of 2 to 5 m/s, preferably 3 to 4 m/s, and most preferably 3.5 m/s to the separation zone 6.
- the magnetic field strength should be in balance with the speed of the conveyor belt.
- the magnetic field strength is 0.10-0.15 Tesla at the belt surface at a belt speed of 3.5 m/s. At a lower belt speed the optimum magnetic field strength will be lower whereas at a higher speed the magnetic field strength should be higher than 0.10-0.15 Tesla.
- the magnetic field strength is proportional to the belt speed.
- the Figure further shows the separation zone 6 and some of the magnetic field lines 7.
- the arrow 8 shows the belt travel direction.
- the magnet preferably a dipole magnet, which is furthermore preferably a cylindrical magnet, 5 is fixed in the drum 3.
- the capital letters N and S refer to north and south of the dipole magnet.
- N is in the down and S is in the upper section, provided that the magnetic field lines are predominantly parallel to the surface of said belt.
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Combined Means For Separation Of Solids (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06117130A EP1878505B1 (de) | 2006-07-13 | 2006-07-13 | Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06117130.2 Division | 2006-07-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2206558A1 true EP2206558A1 (de) | 2010-07-14 |
| EP2206558B1 EP2206558B1 (de) | 2011-11-16 |
Family
ID=37460045
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06117130A Not-in-force EP1878505B1 (de) | 2006-07-13 | 2006-07-13 | Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten |
| EP10155597A Not-in-force EP2206558B1 (de) | 2006-07-13 | 2006-07-13 | Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06117130A Not-in-force EP1878505B1 (de) | 2006-07-13 | 2006-07-13 | Verfahren und Gerät zur Trennung von befreiten nicht eisenhaltigen Metallteilchen von befreiten eisenhaltigen Metallteilchen mittels eines statischen Magneten |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP1878505B1 (de) |
| AT (2) | ATE471213T1 (de) |
| DE (1) | DE602006014960D1 (de) |
| DK (1) | DK1878505T3 (de) |
| ES (1) | ES2346145T3 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2001322C2 (nl) | 2008-02-27 | 2009-08-31 | Univ Delft Tech | Werkwijze en inrichting voor het scheiden van vaste deeltjes met een onderling dichtheidsverschil. |
| EP2393599B1 (de) | 2009-02-03 | 2015-04-08 | Monsanto Holland B.V. | Anreichern der saatqualität einer saatgutpartie |
| NL2002730C2 (en) | 2009-04-08 | 2010-10-11 | Univ Delft Tech | Method and apparatus for separating a non-ferous metal-comprising fraction from ferrous scrap. |
| NL2002736C2 (en) * | 2009-04-09 | 2010-10-12 | Univ Delft Tech | Method for separating magnetic pieces of material. |
| CN106238205A (zh) * | 2016-08-09 | 2016-12-21 | 宿州市威菱耐火材料有限责任公司 | 一种磁选机 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690263A (en) * | 1950-05-12 | 1954-09-28 | Electromagnets Ltd | Magnetic separator |
| DE1051752B (de) * | 1957-05-27 | 1959-03-05 | Gerd Rayhrer Dr Ing | Magnetischer Ausscheider von Eisenteilen aus einem Gutstrom |
| US3057477A (en) | 1961-10-24 | 1962-10-09 | Rappaport Maximiliano | Pill sorting apparatus |
| GB1602279A (en) | 1978-05-23 | 1981-11-11 | British Steel Corp | Magnetic separation |
| WO1988005696A1 (en) | 1987-01-30 | 1988-08-11 | Usx Engineers And Consultants, Inc. | Separation by belt-type magnetic separator |
| EP0455948A1 (de) | 1990-05-10 | 1991-11-13 | Lindemann Maschinenfabrik GmbH | Verfahren und Vorrichtung zum Abtrennen insbesondere schwachmagnetisierbarer Materialien aus einem Feststoffgemisch |
-
2006
- 2006-07-13 ES ES06117130T patent/ES2346145T3/es active Active
- 2006-07-13 AT AT06117130T patent/ATE471213T1/de active
- 2006-07-13 DE DE602006014960T patent/DE602006014960D1/de active Active
- 2006-07-13 AT AT10155597T patent/ATE533560T1/de active
- 2006-07-13 EP EP06117130A patent/EP1878505B1/de not_active Not-in-force
- 2006-07-13 EP EP10155597A patent/EP2206558B1/de not_active Not-in-force
- 2006-07-13 DK DK06117130.2T patent/DK1878505T3/da active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690263A (en) * | 1950-05-12 | 1954-09-28 | Electromagnets Ltd | Magnetic separator |
| DE1051752B (de) * | 1957-05-27 | 1959-03-05 | Gerd Rayhrer Dr Ing | Magnetischer Ausscheider von Eisenteilen aus einem Gutstrom |
| US3057477A (en) | 1961-10-24 | 1962-10-09 | Rappaport Maximiliano | Pill sorting apparatus |
| GB1602279A (en) | 1978-05-23 | 1981-11-11 | British Steel Corp | Magnetic separation |
| WO1988005696A1 (en) | 1987-01-30 | 1988-08-11 | Usx Engineers And Consultants, Inc. | Separation by belt-type magnetic separator |
| EP0455948A1 (de) | 1990-05-10 | 1991-11-13 | Lindemann Maschinenfabrik GmbH | Verfahren und Vorrichtung zum Abtrennen insbesondere schwachmagnetisierbarer Materialien aus einem Feststoffgemisch |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2206558B1 (de) | 2011-11-16 |
| ATE471213T1 (de) | 2010-07-15 |
| EP1878505B1 (de) | 2010-06-16 |
| ATE533560T1 (de) | 2011-12-15 |
| ES2346145T3 (es) | 2010-10-11 |
| DE602006014960D1 (de) | 2010-07-29 |
| EP1878505A1 (de) | 2008-01-16 |
| DK1878505T3 (da) | 2010-09-27 |
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