EP0006877A1 - Magnetic separation comprising two rotating magnetic drums with polarity reversal. - Google Patents

Magnetic separation comprising two rotating magnetic drums with polarity reversal.

Info

Publication number
EP0006877A1
EP0006877A1 EP78900057A EP78900057A EP0006877A1 EP 0006877 A1 EP0006877 A1 EP 0006877A1 EP 78900057 A EP78900057 A EP 78900057A EP 78900057 A EP78900057 A EP 78900057A EP 0006877 A1 EP0006877 A1 EP 0006877A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
drums
soft iron
poles
housing
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
Application number
EP78900057A
Other languages
German (de)
French (fr)
Other versions
EP0006877B1 (en
Inventor
Heinrich 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 EP0006877A1 publication Critical patent/EP0006877A1/en
Application granted granted Critical
Publication of EP0006877B1 publication Critical patent/EP0006877B1/en
Expired legal-status Critical Current

Links

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
    • B03C1/26—Magnetic separation acting directly on the substance being separated with free falling material

Definitions

  • Magnetic separator with two rotating oppositely polarized magnetic drums Magnetic separator with two rotating oppositely polarized magnetic drums.
  • the present invention relates to a magnetic separator with two rotating oppositely polarized magnetic drums, which form a working air gap between them.
  • Drum magnetic separators for separating fine and very fine, especially weakly magnetizable particles from bulk materials of all kinds are known (DE-PS 943 761).
  • Fixed magnets are attached to the inside of each drum, forming a common magnet system for both drums by means of a common iron yoke outside the drums, the force field of which extends over the drum gap.
  • the object of the invention is to achieve a better efficiency by keeping the outer stray fields as small as possible and avoiding scattering outside the effective range as far as possible.
  • a magnetic separator of the type mentioned at the outset that on both sides of the end faces of the magnetic drums two directionally magnetized block magnets are arranged in a closed magnetic circuit, which are connected to one another in pairs on one side of their poles by soft iron pieces with different magnetic poles and on the other Side have pole shoes, in which soft iron parts are mounted as axles, the drums are each arranged in a housing, which have tapering the inlet and widening the outlet in the working air gap and distributed radially around their circumference and in the axial direction grooves or a Cross-section have a star-shaped circumference.
  • the slide plates expediently form parts of the drum housing. It is advisable to design the soft iron parts inside the drums in the form of a segment or a cylindrical cross section and to arrange them on an axis.
  • FIG. 1 is a perspective view of the magnetic separator without housing, partially cut
  • FIG. 2 shows a section through the magnetic separator with housing along the line AA of FIG. 1
  • Fig. 3 shows a section through the magnetic separator with housing along the line AA of FIG. 1, but with a different design of the drums and the axis of rotation and
  • Fig. 4 shows a section through the magnetic separator with housing along the line A-A of Fig. 1, but with a further modification of the design of the drums and the axis.
  • the magnetic separator consists of two iron magnetic drums 1 and 2 and a magnet system with block magnets 3, 4 and 5, 6 arranged on both sides of the end faces of the magnetic drums 1, 2 and 5, which have soft iron pieces 7 and 8 on one side of their poles dissimilar magnetic poles are connected in pairs and have pole shoes 9, 10 and 11, 12 on the other side of the poles.
  • soft iron parts designed as axes 13 and 14 for the rotating magnetic drums 1 and 2 are mounted in ball bearings 15.
  • the magnetic flux of the block magnets 3, 4 and 5, 6 is in an absolutely closed circuit, the magnetic active field or the working air gap 16 is in the gap between the magnetic drums 1 and 2.
  • the magnetic drums 1 and 2 are each arranged in a housing 17 and 18, respectively.
  • the housings 17 and 18 have 16 sliding plates 19 and 20 in the working air gap, which together form a tapering inlet and an expanding outlet on both sides of their partial encirclement of the drums 1 and 2.
  • the magnetic drums 1 and 2 have on their circumference radially distributed and axially extending grooves 21 filled with non-magnetic material, or according to FIG.
  • edges 22 formed in this way cause an increased magnetic radiation, as a result of which the separating effect in the working air gap 16 formed by the sliding plates 19 and 20, which the material to be separated passes vertically from top to bottom, is significantly improved.
  • the axes 13 and 14 are segment-shaped or cylindrical over the length of the magnetic drums 1 and 2.

Abstract

Separateur magnetique pour l'elimination de particules fines, notamment faiblement magnetisees, comprenant deux tambours magnetiques, polarises en sens inverse, en rotation et formant entre eux une fente de travail (16) et avec deux aimants (3, 4, 5, 6) fixes de chaque cote frontal des tambours magnetiques et formant un circuit magnetique ferme, les deux aimants etant relies par paire d'un cote de leurs poles par des pieces de fer doux (7, 8) avec des poles magnetiques differents et presentant des cosses de l'autre cote (9, 10; 11, 12), dans lesquels des particules de fer doux sont logees pour former des axes (13, 4), les tambours (1, 2) se trouvant chacun dans un logement presentant dans la fente de travail (16) des passages glissant pour reduire l'entree et elargir la sortie et qui sont distribues radialement sur leur pourtour et possedent une gorge axiale (21) ou presentent en coupe un pourtour en etoile. De cette maniere, on obtient un systeme ferme nettement moins dispersant que ce qui est connu et qui elimine largement la dispersion externe et engendre un champ magnetique plus fort dans la fente de travail.Magnetic separator for the elimination of fine particles, in particular weakly magnetized, comprising two magnetic drums, polarized in opposite directions, in rotation and forming between them a working slot (16) and with two magnets (3, 4, 5, 6) fixed on each front side of the magnetic drums and forming a closed magnetic circuit, the two magnets being connected in pairs on one side of their poles by pieces of soft iron (7, 8) with different magnetic poles and having lugs the other side (9, 10; 11, 12), in which particles of soft iron are housed to form axes (13, 4), the drums (1, 2) each being located in a housing having in the slot working (16) sliding passages to reduce the entry and widen the outlet and which are distributed radially around their periphery and have an axial groove (21) or have in section a star periphery. In this way, a closed system is obtained which is clearly less dispersing than what is known and which largely eliminates the external dispersion and generates a stronger magnetic field in the working slot.

Description

"Magnetscheider mit zwei umlaufenden gegensätzlich polarisierten Magnettrommeln". "Magnetic separator with two rotating oppositely polarized magnetic drums".
Die vorliegende Erfindung betrifft einen Magnetscheider mit zwei umlaufenden gegensätzlich polarisierten Magnettrommeln, die zwischen sich einen Arbeitsluftspalt bilden.The present invention relates to a magnetic separator with two rotating oppositely polarized magnetic drums, which form a working air gap between them.
Trommelmagnetscheider zum Ausscheiden feiner und feinster, insbesondere auch schwach magnetisierbarer Teilchen aus Schüttgütern aller Art sind bekannt (DE-PS 943 761). Dabei sind im Innern jeder Trommel ortsfeste Magnete angebracht, die durch einen gemeinsamen Eisenrückschluß außerhalb der Trommeln ein für beide Trommeln gemeinsames Magnetsystem bilden, dessen Kraftfeld sich über dem Trommelspalt erstreckt. Bei solchen Systemen treten' an den Arbeitsluftspalten nicht nur große Streuverluste auf, sondern auch außerhalb des wirksamen Bereichs verlaufende unkontrollierte Streuungen der Arbeitsspalte zu anderen Bauteilen mit der Folge, daß das Separiergut die Spalte zusetzt und Betriebsstörungen eintreten, wenn nicht regelmäßig gereinigt wird.Drum magnetic separators for separating fine and very fine, especially weakly magnetizable particles from bulk materials of all kinds are known (DE-PS 943 761). Fixed magnets are attached to the inside of each drum, forming a common magnet system for both drums by means of a common iron yoke outside the drums, the force field of which extends over the drum gap. With such systems, not only do large scatter losses occur at the working air gaps, but also uncontrolled scattering of the working gaps to other components outside the effective range, with the result that the material to be separated clogs up the gaps and malfunctions occur if cleaning is not carried out regularly.
Aufgabe der Erfindung ist es, einen besseren Wirkungsgrad zu erreichen, indem die äußeren Streufelder möglichst klein gehalten und Streuungen außerhalb des wirksamen Bereichs tunlichst vermieden werden. The object of the invention is to achieve a better efficiency by keeping the outer stray fields as small as possible and avoiding scattering outside the effective range as far as possible.
Zur Lösung dieser Aufgabe wird für einen Magnetscheider der eingangs erwähnten Art erfindungsgemäß vorgeschlagen, daß beiderseits der Stirnseiten der Magnettrommeln zwei richtungsmagnetisierte Blockmagnete in einem geschlossenen Magnetkreis angeordnet sind, die auf einer Seite ihrer Pole durch Weicheisenstücke mit ungleichen Magnetpolen paarweise miteinander verbunden sind und auf der anderen Seite Polschuhe aufweisen, in denen als Achsen ausgebildete Weicheisenteile gelagert sind, wobei die Trommeln jeweils in einem Gehäuse angeordnet sind, die im Arbeitsluftspalt den Einlauf verjüngende und den Auslauf erweiternde Rutschbleche aufweisen und auf ihrem Umfang radial verteilt und in axialer Richtung verlaufende Nuten oder einen im Querschnitt sternförmigen Umfang haben.To solve this problem, it is proposed according to the invention for a magnetic separator of the type mentioned at the outset that on both sides of the end faces of the magnetic drums two directionally magnetized block magnets are arranged in a closed magnetic circuit, which are connected to one another in pairs on one side of their poles by soft iron pieces with different magnetic poles and on the other Side have pole shoes, in which soft iron parts are mounted as axles, the drums are each arranged in a housing, which have tapering the inlet and widening the outlet in the working air gap and distributed radially around their circumference and in the axial direction grooves or a Cross-section have a star-shaped circumference.
Auf diese Weise kommt ein gegenüber dem bekannten erheblich streuungsärmeres, geschlossenes System zustande, welches äußere Streuung weitgehend unterbindet und ein stärkeres Magnetfeld im Arbeitsluftspalt erzeugt.In this way, a closed system is created which is considerably less scattered than known, which largely prevents external scattering and generates a stronger magnetic field in the working air gap.
Zweckmäßig bilden die Rutschbleche Teile der Trommelgehäuse. Es empfiehlt sich, die Weicheisenteile im Innern der Trommeln im Querschnitt segmentförmig oder zylindrisch auszubilden und auf einer Achse anzuordnen.The slide plates expediently form parts of the drum housing. It is advisable to design the soft iron parts inside the drums in the form of a segment or a cylindrical cross section and to arrange them on an axis.
Nachstehend wird der Gegenstand der Erfindung an Hand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The subject matter of the invention is explained in more detail below on the basis of exemplary embodiments illustrated in the drawing.
Es zeigen:Show it:
Fig. 1 eine schaubildliche Ansicht auf den Magnetscheider ohne Gehäuse, teilweise geschnitten,1 is a perspective view of the magnetic separator without housing, partially cut,
Fig. 2 einen Schnitt durch den Magnetscheider mit Gehäuse nach der Linie A-A der Fig. 1, Fig. 3 einen Schnitt durch den Magnetscheider mit Gehäuse nach der Linie A-A der Fig. 1, jedoch mit einer anderen Ausbildung der Trommeln und der Drehachse und2 shows a section through the magnetic separator with housing along the line AA of FIG. 1, Fig. 3 shows a section through the magnetic separator with housing along the line AA of FIG. 1, but with a different design of the drums and the axis of rotation and
Fig. 4 einen Schnitt durch den Magnetscheider mit Gehäuse nach der Linie A-A der Fig. 1, jedoch mit einer weiteren Abwandlung der Ausbildung der Trommeln und der Achse.Fig. 4 shows a section through the magnetic separator with housing along the line A-A of Fig. 1, but with a further modification of the design of the drums and the axis.
Gemäß Fig. 1 besteht der Magnetscheider aus zwei eisernen Magnettrommeln 1 und 2 und aus einem Magnetsystem mit beiderseits der Stirnseiten der Magnettrommeln 1,2 angeordneten Blockmagneten 3,4 und 5,6, die auf einer Seite ihrer Pole durch Weicheisenstücke 7 bzw. 8 mit ungleichen Magnetpolen paarweise miteinander verbunden sind und auf der anderen Seite der Pole Polschuhe 9,10 und 11,12 aufweisen. In den Polschuhen 9,10 und 11,12 sind als Achsen 13 und 14 für die umlaufenden Magnettrommeln 1 und 2 ausgebildete Weicheisenteile in Kugellagern 15 gelagert. Über die Weicheisenstücke 7 und 8 einerseits und die Polschuhe 9,10 bzw. 11,12 sowie die Achsen 13 und 14 andererseits befindet sich der magnetische Fluß der Blockmagnete 3,4 und 5,6 in einem absolut geschlossenen Kreis, wobei das magnetische Wirkfeld bzw. der Arbeitsluftspalt 16 sich im Spalt zwischen den Magnettrommeln 1 und 2 befindet.1, the magnetic separator consists of two iron magnetic drums 1 and 2 and a magnet system with block magnets 3, 4 and 5, 6 arranged on both sides of the end faces of the magnetic drums 1, 2 and 5, which have soft iron pieces 7 and 8 on one side of their poles dissimilar magnetic poles are connected in pairs and have pole shoes 9, 10 and 11, 12 on the other side of the poles. In the pole pieces 9, 10 and 11, 12, soft iron parts designed as axes 13 and 14 for the rotating magnetic drums 1 and 2 are mounted in ball bearings 15. Via the soft iron pieces 7 and 8 on the one hand and the pole pieces 9, 10 and 11, 12 as well as the axes 13 and 14, on the other hand, the magnetic flux of the block magnets 3, 4 and 5, 6 is in an absolutely closed circuit, the magnetic active field or the working air gap 16 is in the gap between the magnetic drums 1 and 2.
Die Magnettrommeln 1 und 2 sind jeweils in einem Gehäuse 17 bzw. 18 angeordnet. Die Gehäuse 17 und 18 weisen im Arbeitsluftspalt 16 Rutschbleche 19 und 20 auf, die zusammen einen sich verjüngenden Einlauf und einen sich erweiternden Auslauf beiderseits ihrer teilweisen Umfassung der Trommeln 1 und 2 bilden. Die Magnettrommeln 1 und 2 haben auf ihrem Umfang radial verteilte und in axialer Richtung verlaufende und mit unmagnetischem Material ausgefüllte Nuten 21, bzw. gemäß Fig.3 einen im Querschnitt sternförmigen Umfang.The magnetic drums 1 and 2 are each arranged in a housing 17 and 18, respectively. The housings 17 and 18 have 16 sliding plates 19 and 20 in the working air gap, which together form a tapering inlet and an expanding outlet on both sides of their partial encirclement of the drums 1 and 2. The magnetic drums 1 and 2 have on their circumference radially distributed and axially extending grooves 21 filled with non-magnetic material, or according to FIG.
Die auf diese Weise gebildeten Kanten 22 (Fig. 2) bewirken eine verstärkte magnetische Abstrahlung, wodurch die Separierwirkung in dem durch die Rutschbleche 19 und 20 gebildeten Arbeitsluftspalt 16, den das Separiergut senkrecht von oben nach unten passiert, bedeutend verbessert wird. Zur weiteren Erhöhung des Magnetflusses im Arbeitsluftspalt 16 sind die Achsen 13 und 14 über die Lange der Magnettrommeln 1 und 2 segmentförmig oder zylindrisch ausgebildet. The edges 22 formed in this way (FIG. 2) cause an increased magnetic radiation, as a result of which the separating effect in the working air gap 16 formed by the sliding plates 19 and 20, which the material to be separated passes vertically from top to bottom, is significantly improved. To further increase the magnetic flux in the working air gap 16, the axes 13 and 14 are segment-shaped or cylindrical over the length of the magnetic drums 1 and 2.

Claims

Patentansprüche Claims
1. Magnetscheider mit zwei umlaufenden gegensätzlich polarisierten Magnettrommeln, die zwischen sich einen Arbeitsluftspalt bilden, d a d u r c h g e k e n n z e i c h n e t , daß beiderseits der Stirnseiten der Magnettrommeln (1,2) zwei richtungsmagnetisierte Blockmagnete (3,4; 5,6) in einem geschlossenen Magnetkreis angeordnet sind, die auf einer Seite ihrer Pole durch Weicheisenstücke (7,8) mit ungleichen Magnetpolen paarweise miteinander verbunden sind und auf der anderen Seite Polschuhe (9,10; 11,12) aufweisen, in denen als Achsen (13,14) ausgebildete Weicheisenteile gelagert sind, wobei die Trommeln (1,2) jeweils in einem Gehäuse (17,18) angeordnet sind, die im Arbeitsluftspalt. (16) den Einlauf verjüngende und den Auslauf erweiternde Rutschbleche (19,20) aufweisen und auf ihrem Umfang radial verteilt und in axialer Richtung verlaufende Nuten (21) oder einen im Querschnitt sternförmigen Umfang haben.1. Magnetic separator with two rotating oppositely polarized magnetic drums, which form a working air gap between them, characterized in that two directionally magnetized block magnets (3,4; 5,6) are arranged in a closed magnetic circuit on both sides of the end faces of the magnetic drums (1,2) are connected in pairs on one side of their poles by soft iron pieces (7,8) with unequal magnetic poles and on the other side have pole shoes (9,10; 11,12) in which soft iron parts designed as axes (13,14) are stored, the drums (1, 2) are each arranged in a housing (17, 18) which is in the working air gap. (16) have slipping plates (19, 20) tapering the inlet and widening the outlet and have radially distributed on their circumference and have grooves (21) running in the axial direction or a circumference which is star-shaped in cross section.
2. Magnetscheider nach Anspruch 1, d a d u r c h , g e k e n n z e i c h n e t , daß die Rutschbleche (19,20) Teile der Gehäuse (17,18) bilden.2. Magnetic separator according to claim 1, d a d u r c h, g e k e n n z e i c h n e t that the sliding plates (19,20) form parts of the housing (17,18).
3. Magnetscheider nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß die Weicheisenteile im Innern der Trommeln (1,2) im Querschnitt segmentförmig oder zylindrisch ausgebildet und als Achsen (13,14) angeordnet sind. 3. Magnetic separator according to claim 1 or 2, so that the soft iron parts in the interior of the drums (1, 2) are segment-shaped or cylindrical in cross-section and are arranged as axes (13, 14).
EP78900057A 1977-07-25 1978-07-05 Magnetic separation comprising two rotating magnetic drums with polarity reversal Expired EP0006877B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2733473A DE2733473C2 (en) 1977-07-25 1977-07-25 Use of an unshielded permanent magnetic double yoke system for separation purposes
DE2733473 1977-07-25

Publications (2)

Publication Number Publication Date
EP0006877A1 true EP0006877A1 (en) 1980-01-23
EP0006877B1 EP0006877B1 (en) 1981-07-15

Family

ID=6014774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78900057A Expired EP0006877B1 (en) 1977-07-25 1978-07-05 Magnetic separation comprising two rotating magnetic drums with polarity reversal

Country Status (18)

Country Link
US (1) US4296865A (en)
EP (1) EP0006877B1 (en)
JP (1) JPS5424364A (en)
AT (1) AT358497B (en)
BE (1) BE869080R (en)
CH (1) CH622720A5 (en)
DD (1) DD137195A5 (en)
DE (1) DE2733473C2 (en)
DK (1) DK365777A (en)
ES (1) ES471925A2 (en)
FI (1) FI772476A (en)
GB (1) GB2020999B (en)
IT (1) IT1109533B (en)
NL (1) NL7807790A (en)
NO (1) NO772901L (en)
PL (1) PL208623A1 (en)
SE (1) SE7709179L (en)
WO (1) WO1979000060A1 (en)

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JP2533481B2 (en) * 1985-07-19 1996-09-11 大同特殊鋼株式会社 Non-magnetic high strength stainless steel and method for producing the same
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CN104384015A (en) * 2014-11-14 2015-03-04 张祥平 Twin-roll magnetic separator
CN113560848B (en) * 2021-07-26 2023-06-02 王静静 Magnet separating mechanism of chessman and magnet pressing device

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Also Published As

Publication number Publication date
JPS5424364A (en) 1979-02-23
IT1109533B (en) 1985-12-16
ES471925A2 (en) 1979-05-16
IT7825693A0 (en) 1978-07-14
SE7709179L (en) 1979-01-26
FI772476A (en) 1979-01-26
GB2020999B (en) 1982-04-15
ATA531478A (en) 1980-02-15
DK365777A (en) 1979-01-26
NL7807790A (en) 1979-01-29
NO772901L (en) 1979-01-26
DE2733473A1 (en) 1979-02-08
GB2020999A (en) 1979-11-28
EP0006877B1 (en) 1981-07-15
DE2733473C2 (en) 1986-04-17
DD137195A5 (en) 1979-08-22
WO1979000060A1 (en) 1979-02-22
BE869080R (en) 1978-11-16
PL208623A1 (en) 1979-05-21
US4296865A (en) 1981-10-27
CH622720A5 (en) 1981-04-30
AT358497B (en) 1980-09-10

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