EP0025238A1 - Centrifugal mill - Google Patents

Centrifugal mill Download PDF

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Publication number
EP0025238A1
EP0025238A1 EP80200755A EP80200755A EP0025238A1 EP 0025238 A1 EP0025238 A1 EP 0025238A1 EP 80200755 A EP80200755 A EP 80200755A EP 80200755 A EP80200755 A EP 80200755A EP 0025238 A1 EP0025238 A1 EP 0025238A1
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EP
European Patent Office
Prior art keywords
drum
axis
discharge
conical extension
grinding drum
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.)
Withdrawn
Application number
EP80200755A
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German (de)
French (fr)
Inventor
Konrad Dipl.-Ing. Schymura
Friedrich Rosenstock
Heinrich Ing.Grad. Gote
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0025238A1 publication Critical patent/EP0025238A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/08—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with containers performing a planetary movement

Definitions

  • the invention relates to a centrifugal mill with a cylindrical grinding drum which rotates about its own drum axis and at the same time rotates on a rotating circle with a constant rotation ratio about a fixed axis of rotation parallel to the drum axis, the distance between the drum axis and the axis of rotation being smaller than the radius of the grinding drum.
  • a drive mechanism for the rotation of the grinding drum about the drum axis and for rotation on the rotation circle a loading device on one end part and a discharge device on the other end part of the grinding drum.
  • a centrifugal mill with a cylindrical grinding drum of the type described at the outset is known, the feeding being carried out by means of a funnel-shaped loading device through a vertical end part and an overflow nozzle being arranged as a discharge device in the other vertical end part.
  • a discharge screw can also be arranged in the discharge device, which feeds coarse material back into the grinding drum.
  • Such a centrifugal mill with a horizontally mounted grinding drum is also described in DE-OS 2647578, in which a central opening with a charging device is arranged in a vertical end part and a central opening with an overflow nozzle is arranged in the other vertical end part.
  • the invention has for its object to reduce the wear in the loading and emptying zone and to prevent the throwing out of grinding media.
  • conical extension parts are arranged on both end parts
  • a spiral entry device is placed on the loading side of the conical extension part
  • discharge openings are arranged on the discharge side near the end of the conical extension part in the jacket of the cone.
  • the conical extension parts are attached to the open end parts with their axis extending the axis of the grinding drum. They can consist of several parts that are attached one behind the other. This makes assembly and disassembly easier and quicker access to the grinding drum.
  • the loading opening of the spiral is arranged upwards.
  • the size of the loading opening is expediently chosen so that the edge of the opening does not cover an area during the movement of the grinding drum on the rotation circle, which is sufficient for a stationary loading. In the case of a horizontally arranged grinding drum and a rectangular opening, the distance between the two edges parallel to the axis of the grinding drum must be greater than the diameter of the rotating circle. This means e.g. no flexible loading device connected to the opening required.
  • a preferred embodiment is that the spiral of the entry device is arranged in one plane. This results in a particularly even entry of the material into the grinding drum.
  • a preferred embodiment consists in that the part of the conical extension part provided with the discharge openings is cylindrical. This results in a particularly even discharge.
  • a preferred embodiment consists in that a collecting channel with a directed discharge opening is fastened around the part of the conical extension part provided with discharge openings. As a result, the discharged material is collected in a simple manner and can be removed in one place.
  • a preferred embodiment is that the discharge openings in the conical extension part are slit-shaped. This also makes the discharge more uniform.
  • the conical extension part 2a and the discharge side the conical extension part 2b are fastened to the two front parts 1 of the grinding drum.
  • the spiral-shaped insertion device 3 is placed on the extension part 2a.
  • slot-shaped discharge devices 4 are attached in the jacket of the cone near the end of the cone.
  • the spiral 5 is arranged in one plane in the insertion device 3.
  • the part of the extension part 2b provided with discharge openings is cylindrical and surrounded by a collecting channel 7 with the discharge opening 8 directed downwards.
  • the advantages of the invention are that the wear in the loading and emptying zone is significantly reduced, the throwing out of grinding media is avoided, and a very uniform loading and very uniform discharge is achieved with a considerable increase in throughput.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

In a centrifugal mill with a cylindrical grinding drum which rotates about its own drum axis and at the same time rotates on a circle of rotation with constant turning ratio about a fixed axis of rotation which is parallel to the drum axis, and the distance of the drum axis from the rotation axis is smaller than the radius of the grinding drum, and which grinding drum has a charging device on an end part and a discharge device on the other end part of the grinding drum, wear occurs in the charging and emptying zone and ground bodies can be thrown out. This is prevented by arranging conical extension parts (2a, 2b) on both end parts (1), mounting a spiral loading device (3) on the conical extension part (2a) on the charging side and arranging discharge orifices (4) in the outer surface of the cone on the discharge side near to the end of the conical extension part (2b). <IMAGE>

Description

Die Erfindung betrifft eine Zentrifugalmühle mit zylinderförmiger Mahltrommel, die um ihre eigene Trommelachse rotiert und gleichzeitig auf einem Rotationskreis mit konstantem Drehverhältnis um eine feststehende und zu der Trommelachse parallelen Rotationsachse rotiert, wobei der Abstand der Trommelachse von der Rotationsachse kleiner als der Radius der Mahltrommel ist, mit einem Antriebsmechanismus für die Rotation der Mahltrommel um die Trommelachse und für die Rotation auf dem Rotationskreis, einer Beschickungsvorrichtung an einem Stirnteil und einer Austragsvorrichtung an dem anderen Stirnteil der Mahltrommel.The invention relates to a centrifugal mill with a cylindrical grinding drum which rotates about its own drum axis and at the same time rotates on a rotating circle with a constant rotation ratio about a fixed axis of rotation parallel to the drum axis, the distance between the drum axis and the axis of rotation being smaller than the radius of the grinding drum. with a drive mechanism for the rotation of the grinding drum about the drum axis and for rotation on the rotation circle, a loading device on one end part and a discharge device on the other end part of the grinding drum.

Aus der DE-OS 2631826 ist eine Zentrifugalmühle mit zylinderförmiger Mahltrommel der eingangs beschriebenen Art bekannt, wobei die Beschickung mittels einer trichterförmigen Beschickungsvorrichtung durch ein vertikales Stirnteil erfolgt und im anderen vertikalen Stirnteil ein überlaufstutzen als Austragsvorrichtung angeordnet ist. Bei vertikaler Anordnung der Mahltrommel sind in den horizontalen Stirnplatten der Mahltrommel zentrale Öffnungen zur Beschickung und zum Austragen angeordnet, wobei in der Austragsvorrichtung auch eine Austragsschnecke angeordnet sein kann, die grobes Material in die Mahltrommel zurückbefördert.From DE-OS 2631826 a centrifugal mill with a cylindrical grinding drum of the type described at the outset is known, the feeding being carried out by means of a funnel-shaped loading device through a vertical end part and an overflow nozzle being arranged as a discharge device in the other vertical end part. When the grinding drum is arranged vertically, central openings for loading and discharging are arranged in the horizontal end plates of the grinding drum, wherein a discharge screw can also be arranged in the discharge device, which feeds coarse material back into the grinding drum.

Auch in der DE-OS 2647578 ist eine solche Zentrifugalmühle mit horizontal gelagerter Mahltrommel beschrieben, bei der in einem vertikalen Stirnteil eine zentrale Öffnung mit einer Beschickungsvorrichtung angeordnet ist, und in dem anderen vertikalen Stirnteil eine zentrale Öffnung mit einem überlaufstutzen angeordnet ist.Such a centrifugal mill with a horizontally mounted grinding drum is also described in DE-OS 2647578, in which a central opening with a charging device is arranged in a vertical end part and a central opening with an overflow nozzle is arranged in the other vertical end part.

Bei diesen Vorrichtungen tritt ein Verschleiß in der Beschickungs-und Entleerungszona auf, und es können Mahlkugeln heraugsgeschleudert werden.With these devices, wear occurs in the loading and unloading zone, and grinding balls can be thrown up.

Der Erfindung liegt die Aufgabe zugrunde, dem Verschleiß in der Beschickungs- und Entleerungszone zu vermindern und das Herausschleudern von Mahlkörpern zu verhindern.The invention has for its object to reduce the wear in the loading and emptying zone and to prevent the throwing out of grinding media.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß an beiden Stirnteilen konisch ausgebildete Verlängerungsteile angeordnet sind, an der Beschickungsseite auf das konische Verlängerungsteil eine spiralförmige Eintragungsvorrichtung aufgesetzt ist, und an der Austragsseite nahe dem Ende des konischen Verlängerungsteiles in dem Mantel des Konus Austragsöffnungen angeordnet sind. Die konischen Verlängerungsteile sind an den offenen Stirnteilen mit ihrer Achse in Verlängerung der Achse der Mahltrommel angebracht. Sie können aus mehreren Teilen bestehen, die hintereinander befestigt sind. Dadurch wird die Montage und Demontage erleichtert und eine schnellere Zugänglichkeit der Mahltrommel erreicht. Die Beschickungsöffnung der Spirale ist nach oben angeordnet. Zweckmäßigerweise wird die Größe der Beschickungsöffnung so gewählt, daß der Rand der öffnung bei der Bewegung der Mahltrommel auf dem Rotationskreis eine Fläche nicht überstreicht, die für eine stationäre Beschickung ausreicht. Im Falle einer horizontal angeordneten Mahltrommel und einer rechteckigen Öffnung muß dafür der Abstand der beiden Kanten parallel zur Achse der Mahltrommel größer sein als der Durchmesser des Rotationskreises. Dadurch ist z.B. keine flexible und mit der öffnung verbundene Beschickungsvorrichtung erforderlich.This object is achieved according to the invention in that conical extension parts are arranged on both end parts, a spiral entry device is placed on the loading side of the conical extension part, and discharge openings are arranged on the discharge side near the end of the conical extension part in the jacket of the cone. The conical extension parts are attached to the open end parts with their axis extending the axis of the grinding drum. They can consist of several parts that are attached one behind the other. This makes assembly and disassembly easier and quicker access to the grinding drum. The loading opening of the spiral is arranged upwards. The size of the loading opening is expediently chosen so that the edge of the opening does not cover an area during the movement of the grinding drum on the rotation circle, which is sufficient for a stationary loading. In the case of a horizontally arranged grinding drum and a rectangular opening, the distance between the two edges parallel to the axis of the grinding drum must be greater than the diameter of the rotating circle. This means e.g. no flexible loading device connected to the opening required.

Eine vorzugsweise Ausgestaltung besteht darin, daß die Spirale der Eintragsvorrichtung in einer Ebene angeordnet ist. Dadurch ergibt sich ein besonders gleichmäßiger Eintrag des Materials in-die Mahltrommel.A preferred embodiment is that the spiral of the entry device is arranged in one plane. This results in a particularly even entry of the material into the grinding drum.

Eine vorzugsweise Ausgestaltung besteht darin, daß der mit den Austragsöffnungen versehene Teil des konischen Verlängerungsteils zylinderförmig ausgebildet ist. Dadurch ergibt sich ein besonders gleichmäßiger Austrag.A preferred embodiment consists in that the part of the conical extension part provided with the discharge openings is cylindrical. This results in a particularly even discharge.

Eine vorzugsweise Ausgestaltung besteht darin, daß um den mit Austragsöffnungen versehenen Teil des konischen Verlängerungsteils ein Auffangkanal mit gerichteter Austragsöffnung befestigt ist. Dadurch wir das ausgetragene Material in einfacher Weise aufgefangen und kann an einer Stelle abgeführt werden.A preferred embodiment consists in that a collecting channel with a directed discharge opening is fastened around the part of the conical extension part provided with discharge openings. As a result, the discharged material is collected in a simple manner and can be removed in one place.

Eine vorzugsweise Ausgestaltung besteht darin, daß die Austragsöffnungen in dem konischen Verlängerungsteil schlitzförmig ausgebildet sind. Auch hierdurch erfolgt eine Vergleichmäßigung des Austrags.A preferred embodiment is that the discharge openings in the conical extension part are slit-shaped. This also makes the discharge more uniform.

Die Erfindung wird an Hand der Zeichnungen näher erläutert.

  • Fig. 1 ist ein schematischer Längsschnitt durch eine horizontal angeordnete Mahltrommel
  • Fig. 2 ist ein Querschnitt gemäß Linie A-A in Fig. 1
  • Fig. 3 ist ein Querschnitt gemäß Linie B-B in Fig. 1
  • Fig. 4 zeigt eine zylinderförmige Ausgestaltung des mit Austragsöffnungen versehenen Teils des konischen Verlängerungsteils im Querschnitt
  • Fig. 5 ist ein Querschnitt gemäß Linie D-D in Fig. 4.
The invention is explained in more detail with reference to the drawings.
  • Fig. 1 is a schematic longitudinal section through a horizontally arranged grinding drum
  • FIG. 2 is a cross section along line AA in FIG. 1
  • FIG. 3 is a cross section along line BB in FIG. 1
  • Fig. 4 shows a cylindrical configuration of the part of the conical extension part provided with discharge openings in cross section
  • FIG. 5 is a cross section along line DD in FIG. 4.

An den beiden Sirnteilen 1 der Mahltrommel ist beschickungsseitig das konisch ausgebildete Verlängerungsteil 2a und austragsseitig das konische Verlängerungsteil 2b befestigt. Auf das Verlängerungsteil 2a ist die spiralförmige Eintragsvorrichtung 3 aufgesetzt. Im Verlängerungsteil 2b sind im Mantel des Konus nahe dem Ende des Konus schlitzförmige Austragsvorrichtungen 4 angebracht.The conical extension part 2a and the discharge side the conical extension part 2b are fastened to the two front parts 1 of the grinding drum. The spiral-shaped insertion device 3 is placed on the extension part 2a. In the extension part 2b, slot-shaped discharge devices 4 are attached in the jacket of the cone near the end of the cone.

Die Spirale 5 ist in einer Ebene in der Eintragsvorrichtung 3 angeordnet. In Figur 4 ist der mit Austragsöffnungen versehene Teil des Verlängerungsteil 2b zylinderförmig ausgebildet und von einem Auffangkanal 7 mit nach unten gerichteter Austragsöffnung 8 umgeben.The spiral 5 is arranged in one plane in the insertion device 3. In FIG. 4, the part of the extension part 2b provided with discharge openings is cylindrical and surrounded by a collecting channel 7 with the discharge opening 8 directed downwards.

Die Vorteile der Erfindung bestehen darin, daß der Verschleiß in der Beschickungs- und Entleerungszone wesentlich vermindert wird, das Herausschleudern von Mahlkörpern vermieden wird, und eine sehr gleichmäßige Beschickung und sehr gleichmäßiger Austrag mit beträchtlicher Steigerung des Durchsatzes erzielt wird.The advantages of the invention are that the wear in the loading and emptying zone is significantly reduced, the throwing out of grinding media is avoided, and a very uniform loading and very uniform discharge is achieved with a considerable increase in throughput.

Claims (5)

1. Zentrifugalmühle mit zylinderförmiger Mahltrommel, die um ihre eigene Trommelachse rotiert und gleichzeitig auf einem Rotationskreis mit konstantem Drehverhältnis um eine feststehende und zu der Trommelachse parallelen Rotationsachse rotiert, wobei der Abstand der Trommelachse von der Rotationsachse kleiner als der Radius der Mahltrommel ist, mit einem Antriebsmechanismus für die Rotation der Mahltrommel um die Trommelachse und für die Rotation auf dem Rotationskreis, einer Beschickungsvorrichtung an einem Stirnteil und einer Austragsvorrichtung an dem anderen Stirnteil der Mahltrommel, dadurch gekennzeichnet, daß an beiden Stirnteilen (1) konisch ausgebildete Verlängerungsteile (2a, 2b) angeordnet sind, an der Beschickungsseite auf das konische Verlängerungsteil (2a) eine spiralförmige Eintragsvorrichtung (3) aufgesetzt ist, und an der Austragsseite nahe dem Ende des konischen Verlängerungsteiles (2b) in dem Mantel des Konus Austragsöffnungen (4) angeordnet sind.1.Centrifugal mill with a cylindrical grinding drum that rotates around its own drum axis and at the same time rotates on a rotating circle with a constant rotation ratio around a fixed axis of rotation parallel to the drum axis, the distance between the drum axis and the axis of rotation being smaller than the radius of the grinding drum, with one Drive mechanism for rotating the grinding drum around the drum axis and for rotating on the rotation circle, a loading device on one end part and a discharge device on the other end part of the grinding drum, characterized in that on both end parts (1) conically shaped extension parts (2a, 2b) are arranged, on the loading side of the conical extension part (2a) a spiral-shaped insertion device (3) is placed, and on the discharge side near the end of the conical extension part (2b) in the jacket of the cone discharge openings (4) are arranged. 2. Zentrifugalmühle nach Anspruch 1, dadurch gekennzeichnet. daß die Spirale (5) der Eintragsvorrichtung (3) in einer Ebene angeordnet ist.2. Centrifugal mill according to claim 1, characterized. that the spiral (5) of the entry device (3) is arranged in one plane. 3. Zentrifugalmühle nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der mit den Austragsöffnungen (4)versehene Teil (6) des konischen Verlängerungsteils (2b) zylinderförmig ausgebildet ist.3. Centrifugal mill according to claim 1 or 2, characterized in that the part (6) of the conical extension part (2b) provided with the discharge openings (4) is cylindrical. 4. Zentrifugalmühle nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß um den mit Austragsöffnungen (4) versehenen Teil des konischen Verlängerungsteils (2b) ein Auffangkanal (7) mit gerichteter Austragsöffnung (8) befestigt ist.4. Centrifugal mill according to one of claims 1 to 3, characterized in that around the part provided with discharge openings (4) of the conical extension part (2b) a collecting channel (7) with a directed discharge opening (8) is attached. 5. Zentrifugalmühle nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Austragsöffnungen (4) in dem konischen Verlängerungsteil (2b) schlitzförmig ausgebildet sind.5. Centrifugal mill according to one of claims 1 to 4, characterized in that the discharge openings (4) in the conical extension part (2b) are slot-shaped.
EP80200755A 1979-09-07 1980-08-08 Centrifugal mill Withdrawn EP0025238A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792936208 DE2936208A1 (en) 1979-09-07 1979-09-07 CENTRIFUGAL MILL
DE2936208 1979-09-07

Publications (1)

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EP0025238A1 true EP0025238A1 (en) 1981-03-18

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ID=6080309

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Application Number Title Priority Date Filing Date
EP80200755A Withdrawn EP0025238A1 (en) 1979-09-07 1980-08-08 Centrifugal mill

Country Status (8)

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EP (1) EP0025238A1 (en)
JP (1) JPS5645767A (en)
AU (1) AU6208580A (en)
CA (1) CA1146517A (en)
DE (1) DE2936208A1 (en)
IN (1) IN151923B (en)
NO (1) NO802426L (en)
ZA (1) ZA805516B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100389053C (en) * 2005-11-09 2008-05-21 中国铝业股份有限公司 Partitioned compartment type ore feeder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224098A1 (en) * 1982-06-29 1983-12-29 Metallgesellschaft Ag, 6000 Frankfurt Centrifugal mill with horizontal, cylindrical grinding drum
JP3002476U (en) * 1994-01-20 1994-09-27 大島工業株式会社 Ball mill

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE204949C (en) *
US2549919A (en) * 1947-06-06 1951-04-24 Smidth & Co As F L Airswept rotary mill or drum having separate discharge means for air and ground material
US3027104A (en) * 1961-02-28 1962-03-27 Newton L Hall Horizontal rotary grinding mill with floating load-partition
FR1289073A (en) * 1961-05-04 1962-03-30 Kloeckner Humboldt Deutz Ag Crusher for fine crushing of natural or synthetic materials
FR2323446A1 (en) * 1975-09-10 1977-04-08 Chamber Mines Services Proprie CENTRIFUGAL CRUSHER

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE204949C (en) *
US2549919A (en) * 1947-06-06 1951-04-24 Smidth & Co As F L Airswept rotary mill or drum having separate discharge means for air and ground material
US3027104A (en) * 1961-02-28 1962-03-27 Newton L Hall Horizontal rotary grinding mill with floating load-partition
FR1289073A (en) * 1961-05-04 1962-03-30 Kloeckner Humboldt Deutz Ag Crusher for fine crushing of natural or synthetic materials
FR2323446A1 (en) * 1975-09-10 1977-04-08 Chamber Mines Services Proprie CENTRIFUGAL CRUSHER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100389053C (en) * 2005-11-09 2008-05-21 中国铝业股份有限公司 Partitioned compartment type ore feeder

Also Published As

Publication number Publication date
IN151923B (en) 1983-09-03
NO802426L (en) 1981-03-09
DE2936208A1 (en) 1981-03-26
CA1146517A (en) 1983-05-17
AU6208580A (en) 1981-03-12
JPS5645767A (en) 1981-04-25
ZA805516B (en) 1982-04-28

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Inventor name: ROSENSTOCK, FRIEDRICH