EP1511573B1 - Agitating mill - Google Patents

Agitating mill Download PDF

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Publication number
EP1511573B1
EP1511573B1 EP03747391A EP03747391A EP1511573B1 EP 1511573 B1 EP1511573 B1 EP 1511573B1 EP 03747391 A EP03747391 A EP 03747391A EP 03747391 A EP03747391 A EP 03747391A EP 1511573 B1 EP1511573 B1 EP 1511573B1
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EP
European Patent Office
Prior art keywords
segments
hub
disk
mill according
agitating mill
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
Application number
EP03747391A
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German (de)
French (fr)
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EP1511573A1 (en
Inventor
Udo Enderle
Jochen Suk
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.)
Glencore Queensland Ltd
Netzsch Feinmahltechnik GmbH
Original Assignee
Xstrata Queensland Ltd
Netzsch Feinmahltechnik GmbH
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Publication of EP1511573A1 publication Critical patent/EP1511573A1/en
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Classifications

    • 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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/163—Stirring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/052—Stirrers with replaceable wearing elements; Wearing elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/071—Fixing of the stirrer to the shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
    • B01F33/8305—Devices with one shaft, provided with mixing and milling tools, e.g. using balls or rollers as working tools; Devices with two or more tools rotating about the same axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/115—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis
    • B01F27/1151—Stirrers characterised by the configuration of the stirrers comprising discs or disc-like elements essentially perpendicular to the stirrer shaft axis with holes on the surface

Definitions

  • the invention relates to an agitator mill with a grinding container and a stirring shaft rotating therein on which a plurality of disk-shaped grinding elements are arranged in series.
  • An agitating mill is known in which a stirring shaft is arranged in the grinding chamber.
  • the agitator shaft carries at an axial distance from each other a plurality of disc-shaped grinding elements.
  • Each of the grinding elements is bounded radially by an edge bead. Between this edge bead and a hub which is connected by a pin connection with the agitator shaft, the grinding element 4 has circular openings.
  • the grinding element itself is attached via an internal thread in the stirring shaft region with an external thread on the hub. So that the grinding element can be firmly connected to the hub, the hub is provided only over a portion of its surface facing the grinding chamber with a thread with reduced hub outer diameter.
  • the grinding element If the grinding element is screwed onto this thread of the hub, the grinding element abuts against the hub part of larger diameter and is clamped therewith. If one or more grinding elements except on the last wear on the stirring shaft, which inevitably occurs after a certain number of operating hours, the previously arranged grinding elements must always be removed from the stirring shaft for replacement.
  • An agitating mill with a screw conveyor is known as a grinding element.
  • the screw conveyor has a shaft to which a screw surface is welded. Spiral segments are screwed to the screw surface.
  • a disk-shaped grinding element for a stirred mill is known.
  • the grinding element is a one-piece disc.
  • the disc has on both sides orthogonal standing on the disc surface webs.
  • the object of the invention is to make the grinding elements so that an exchange of individual grinding elements is made possible.
  • the solution according to the invention consists of assembling a disc-shaped grinding element of several disc segments.
  • the grinding elements can also be provided with a one- or multi-part hub.
  • the advantage of using a detachable from the disc segments hub is that the hub can be made of a different material and thus can be interpreted for other load criteria.
  • the disk segments are connected by screw with the one or more parts hub, the screw in the radial direction of the passages in the segments to reach into the hub.
  • the parting line of the hub to the parting line of the disc segments is offset by 15-90 °, the grinding element can be made of only 4 hub and disc segments finished.
  • this is advantageous since a hub can be quickly separated from the disk segments.
  • the grinding disc on passages. Through these passages the grinding effect is increased.
  • the disk segments can be interconnected with screws, which are directed from one passage to the other.
  • the stability of the disc consisting of several disc segments can or must be increased depending on the size of the diameter of the grinding disc.
  • the joints of the disk segments are designed differently, the variants ranging from a mere blunt approach over projections and recesses to groove-spring designs.
  • Fig. 1 illustrates a refining element 12 consisting of five disc segments 14, 16, 18, 20, 22.
  • the disc segments have a disc core 24 surrounded by a plastic or rubber layer 26.
  • the disk segments are on their legs 28, 30, as well as in Fig. 2 shown provided with projections 32 and recesses 34, which provide for the axial support of the disc transitions.
  • the disc segments 14, 16, 18, 20, 22 have slot-shaped apertures 36.
  • the five disc segments 14 to 22 and the centrally arranged one-piece hub are through Screws 40 connected together.
  • the positive connection between the drive shaft and the hub 38 is formed by the insertion of a spring in the groove 42nd
  • the disk segments 14 to 22 can be removed or replaced individually, but the hub 38 itself is in one piece and includes the stirring shaft.
  • the hub or hubs 38 can only be removed from the stirrer shaft by the removal of one or more hubs 38 or any spacers between the hubs.
  • the Fig. 5 illustrates a refining element 12 which is composed of both two disc segments 46, 48, as well as two hub elements 50, 52.
  • plastic polyamide, polyurethane
  • metal reinforcements 54, 56, 58, 60 are introduced. These metal reinforcements 54, 56, 58, 60 are connected by screws to the hub.
  • Each disk segment 46, 48 is offset, for example by 90 °, from the parting lines 64, 64 'of the hub elements 50, 52.
  • the Fig. 6 illustrates the design of the legs of the disk segments 46, 48 after Fig. 5 .
  • the illustrated dovetail connection which enter the two disc segments 46, 48 in the region of their legs, increases their stabilization in addition to the fastening by the screws.
  • FIGS. 7 and 8 Another way to connect the disk segments 65, 66, 68,70 to the hub 38, show FIGS. 7 and 8 , Here, the disk segments are fastened in the inner radius region in the direction of their axis of rotation A on a web projecting outwardly from the hub 38.
  • Each of the four disk segments 65, 66, 68, 70 has two screw connections in this overlapping region of web 72 and disk segment 65, 66, 68, 70.
  • the screws 74 used for this purpose penetrate the core 76 of the disk segments 65, 66, 68, 70 and are bolted to the thread in the web 72.
  • a direct connection of two or more disk segments is provided.
  • the disk segments are bolted directly to and with each other.
  • screws extend from the apertures to the adjacent disc segment.
  • pin connections in the area of the shaft or clamping connections between the projections on the disk segments can also provide the firm connection.
  • no central hub is provided in the center of the disc elements.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Milling Processes (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

The invention relates to an agitating mill, in which the agitating shaft is provided with several disc-type milling elements. In previous models the milling discs were replaced by being removed disc by disc from the shaft, together with any spacers that were arranged in between and new discs were then mounted. According to the invention, the milling elements consist of several disc segments, which permits the replacement of individual milling elements without having to dismantle additional milling elements on the shaft.

Description

Die Erfindung betrifft eine Rührwerksmühle mit einem Mahlbehälter und einer darin rotierenden Rührwelle auf der mehrere scheibenförmige Mahlelemente in Reihe angeordnet sind.The invention relates to an agitator mill with a grinding container and a stirring shaft rotating therein on which a plurality of disk-shaped grinding elements are arranged in series.

Aus der US 4513917 ist eine Rührwerksmühle bekannt, bei der im Mahlraum eine Rührwelle angeordnet ist. Die Rührwelle trägt im axialen Abstand zueinander mehrere scheibenförmige Mahlelemente. Jedes der Mahlelemente wird radial von einem Randwulst begrenzt. Zwischen diesem Randwulst und einer Nabe, die durch eine Stiftverbindung mit der Rührwelle verbunden ist, weist das Mahlelement 4 kreisförmige Durchbrechungen auf. Das Mahlelement selbst ist über ein Innengewinde im Rührwellenbereich mit einem Außengewinde an der Nabe befestigt. Damit das Mahlelement fest mit der Nabe verbunden werden kann, ist die Nabe nur über einen Teilbereich ihrer zum Mahlraum gerichteten Oberfläche mit einem Gewinde mit reduziertem Naben-Außendurchmesser versehen. Schraubt man das Mahlelement auf dieses Gewinde der Nabe auf, so stößt das Mahlelement gegen das Nabenteil größeren Durchmessers und wird mit diesem verspannt. Sollten ein oder mehrere Mahlelemente außer dem letzten auf der Rührwelle verschleißen, was unweigerlich nach einer bestimmten Anzahl von Betriebsstunden auftritt, so müssen für den Austausch stets auch die zuvor angeordneten Mahlelemente von der Rührwelle entfernt werden.From the US 4513917 An agitating mill is known in which a stirring shaft is arranged in the grinding chamber. The agitator shaft carries at an axial distance from each other a plurality of disc-shaped grinding elements. Each of the grinding elements is bounded radially by an edge bead. Between this edge bead and a hub which is connected by a pin connection with the agitator shaft, the grinding element 4 has circular openings. The grinding element itself is attached via an internal thread in the stirring shaft region with an external thread on the hub. So that the grinding element can be firmly connected to the hub, the hub is provided only over a portion of its surface facing the grinding chamber with a thread with reduced hub outer diameter. If the grinding element is screwed onto this thread of the hub, the grinding element abuts against the hub part of larger diameter and is clamped therewith. If one or more grinding elements except on the last wear on the stirring shaft, which inevitably occurs after a certain number of operating hours, the previously arranged grinding elements must always be removed from the stirring shaft for replacement.

Aus der WO-A1-01/51212 ist eine Rührwerksmühle mit einem Mahlbehälter und einer darin rotierender Rührwelle auf der mehrere scheibenförmige Mahlsegmente sitzen, bekannt.From the WO-A1-01 / 51212 is an agitator mill with a grinding container and a rotating therein agitator shaft sitting on the disc-shaped several grinding segments known.

Aus der US-A-4 018 385 ist eine Rührwerksmühle bekannt, bei der die Mahlelemente Propeller mit austauschbaren Propellerflügeln sind.From the US-A-4 018 385 An agitating mill is known in which the grinding elements are propellers with interchangeable propeller blades.

Aus der US-A-4 242 002 ist eine Rührwerksmühle mit einem Schneckenförderer als Mahlelement bekannt. Der Schneckenförderer hat eine Welle, an die eine Schraubenfläche angeschweißt ist. An die Schraubenfläche sind Wendelsegmente angeschraubt.From the US-A-4,242,002 An agitating mill with a screw conveyor is known as a grinding element. The screw conveyor has a shaft to which a screw surface is welded. Spiral segments are screwed to the screw surface.

Aus der D4-A-4 021 024 ist ein scheibenförmiges Mahlelement für eine Rührwerksmühle bekannt. Das Mahlelement ist eine einteilige Scheibe. Zur besseren Durchmischung und Erhöhung der Mahlleistung des zu mahlenden Guts hat die Scheibe beidseits orthogonal auf der Scheibenfläche stehende Stege.From D4-A-4 021 024 a disk-shaped grinding element for a stirred mill is known. The grinding element is a one-piece disc. For better mixing and increasing the grinding performance of the material to be ground, the disc has on both sides orthogonal standing on the disc surface webs.

Die Aufgabe der Erfindung besteht darin, die Mahlelemente so zu gestalten, daß ein Austausch einzelner Mahlelemente ermöglicht wird.The object of the invention is to make the grinding elements so that an exchange of individual grinding elements is made possible.

Die Aufgabe wird durch eine Rührwerksmühle nach Anspruch 1 gelöst.The object is achieved by an agitator mill according to claim 1.

Weitere vorteilhafte Ausführungsformen gehen aus den Merkmalen der Unteransprüche hervor.Further advantageous embodiments will become apparent from the features of the dependent claims.

Die erfindungsgemäße Lösung besteht darin, ein scheibenförmiges Mahlelement aus mehreren Scheibensegmenten zusammenzusetzen. Damit besteht die Möglichkeit beim Verschleiß bzw. Bruch von Mahlscheiben diese einzeln auszutauschen, ohne daß damit stets der Ausbau der Rührwelle bzw. das Abnehmen aller oder mehrerer Mahlelemente notwendig wird. Insbesondere bei großen Rührwerksmühlen mit großem Durchmesser der Mahlelemente erspart dies viel Montagezeit. Beispielsweise können mit dieser Möglichkeit auch Mahlelemente aus verschleißintensiven Mahlzonen nach bestimmten Betriebsstunden gegen Mahlelemente aus verschleißarmen Mahlzonen ausgetauscht werden. Bei der Montage bzw. Demontage von Mahlelementen mit bis zu 2 m Querschnitt und mehr, spielt auch das Gewicht der Mahlelemente eine wesentliche Rolle. Bestehen die Mahlelemente aus mehreren Scheibensegmenten, so verringert dies natürlich auch den technischen Aufwand beim Wechselvorgang.The solution according to the invention consists of assembling a disc-shaped grinding element of several disc segments. Thus, there is the possibility during wear or breakage of grinding discs to replace them individually, without always the removal of the stirring shaft or the removal of all or more Grinding elements is necessary. This saves a lot of assembly time, especially with large agitator mills with a large diameter of the grinding elements. For example, with this option, grinding elements from wear-intensive grinding zones can be exchanged for grinding elements from wear-resistant grinding zones after certain operating hours. When mounting or dismounting grinding elements with up to 2 m cross-section and more, the weight of the grinding elements also plays an essential role. Of course, if the grinding elements consist of several disc segments, this naturally also reduces the technical complexity involved in the changeover process.

Entsprechend einer Weiterbildung der Erfindung können die Mahlelemente auch mit einer ein- oder mehrteiligen Nabe versehen sein. Der Vorteil bei der Verwendung einer von den Scheibensegmenten abtrennbaren Nabe liegt darin, daß die Nabe aus einem anderen Material gefertigt sein kann und somit für andere Belastungskriterien auslegbar ist.According to a development of the invention, the grinding elements can also be provided with a one- or multi-part hub. The advantage of using a detachable from the disc segments hub is that the hub can be made of a different material and thus can be interpreted for other load criteria.

Anhand einer weiteren erfindungsgemäßen Weiterbildung sind die Scheibensegmente über Schraubverbindungen mit der ein oder mehrteiligen Nabe verbunden, wobei die Schraubverbindungen in radialer Richtung von den Durchlässen in den Segmenten aus bis in die Nabe reichen.On the basis of a further development of the invention, the disk segments are connected by screw with the one or more parts hub, the screw in the radial direction of the passages in the segments to reach into the hub.

Da entsprechend einer weiteren erfindungsgemäßen Weiterbildung der Erfindung die Trennfuge der Nabe zur Trennfuge der Scheibensegmente um 15-90 ° versetzt ist, läßt sich das Mahlelement aus nur 4 Naben- und Scheibensegmenten fertigen. Insbesondere bei der von Zeit zu Zeit notwendigen Beschichtung der Scheibensegmente mit Verschleißmaterial ist dies von Vorteil, da eine Nabe schnell von den Scheibensegmenten trennbar ist.Since according to a further inventive development of the invention, the parting line of the hub to the parting line of the disc segments is offset by 15-90 °, the grinding element can be made of only 4 hub and disc segments finished. In particular, in the case of the coating of the disk segments with wear material, which is necessary from time to time, this is advantageous since a hub can be quickly separated from the disk segments.

In einer erfindungsgemäßen Weiterbildung der Erfindung weist die Mahlscheibe Durchlässe auf. Durch diese Durchlässe wird die Mahlwirkung erhöht. Außerdem können die Scheibensegmente untereinander mit Schrauben verbunden werden, die von einem Durchlaß zum anderen gerichtet sind.In an embodiment of the invention, the grinding disc on passages. Through these passages the grinding effect is increased. In addition, the disk segments can be interconnected with screws, which are directed from one passage to the other.

Die Stabilität der aus mehreren Scheibensegmenten bestehenden Scheibe kann bzw. muß je nach Größe des Durchmessers der Mahlscheibe erhöht werden. Dazu sind die Stoßstellen der Scheibensegmente unterschiedlich gestaltbar, wobei die Varianten von einem bloßen stumpfen Ansatz über Vor- und Rücksprünge bis hin zu Nut-Federgestaltungen reichen.The stability of the disc consisting of several disc segments can or must be increased depending on the size of the diameter of the grinding disc. For this purpose, the joints of the disk segments are designed differently, the variants ranging from a mere blunt approach over projections and recesses to groove-spring designs.

Im Folgenden ist die Erfindung anhand von Ausführungsbeispielen näher erläutert:The invention is explained in more detail below on the basis of exemplary embodiments:

Es zeigt:

  • Fig. 1: Schematische Darstellung eines scheibenförmigen Mahlelements mit fünf Scheibensegmenten
  • Fig. 2: Teilausschnitt der Scheibe nach Fig. 1
  • Fig. 3: Schematische Darstellung eines scheibenförmigen Mahlelements mit fünf Scheibensegmenten mit jeweils zweifacher Schraubverbindung
  • Fig. 4: Teilausschnitt der Mahlscheibe nach Fig. 3
  • Fig. 5: Schematische Darstellung eines scheibenförmigen Mahlelements, bestehend aus zwei Segmenten
  • Fig. 6: Teilausschnitt der Mahlscheibe nach Fig. 5
  • Fig. 7: Schematische Darstellung einer scheibenförmigen Mahlscheibe mit spezieller Nabenbefestigung
  • Fig. 8: Teilausschnitt der Mahlscheibe nach Fig. 7
It shows:
  • Fig. 1 : Schematic representation of a disc-shaped grinding element with five disc segments
  • Fig. 2 Image: Part of the disk after Fig. 1
  • Fig. 3 : Schematic representation of a disc-shaped grinding element with five disc segments, each with a double screw connection
  • Fig. 4 : Part of the grinding disc after Fig. 3
  • Fig. 5 : Schematic representation of a disc-shaped grinding element, consisting of two segments
  • Fig. 6 : Part of the grinding disc after Fig. 5
  • Fig. 7 : Schematic representation of a disc-shaped grinding disc with special hub attachment
  • Fig. 8 : Part of the grinding disc after Fig. 7

Fig. 1 stellt ein Mahlelement 12, bestehend aus fünf Scheibensegmenten 14, 16, 18, 20, 22 dar. Die Scheibensegmente weisen einen Scheibenkem 24 auf, der von einer Kunststoff- oder Gummischicht 26 umgeben ist. Die Scheibensegmente sind an ihren Schenkeln 28, 30, wie auch in Fig. 2 dargestellt, mit Vorsprüngen 32 und Rücksprüngen 34 versehen, die für die axiale Abstützung der Scheibenübergänge sorgen. Zur Erhöhung der Mahl- und Mischleistung, die die Mahlelemente auf das Mahlgut-/Mahlkörpergemisch übertragen, verfügen die Scheibensegmente 14, 16, 18, 20, 22 über langlochförmige Durchlässe 36. Die fünf Scheibensegmente 14 bis 22 und die zentral angeordnete einteilige Nabe sind durch Schrauben 40 miteinander verbunden. Der Formschluß zwischen der Antriebswelle und der Nabe 38 entsteht durch die Einlage einer Feder in die Nut 42. Fig. 1 illustrates a refining element 12 consisting of five disc segments 14, 16, 18, 20, 22. The disc segments have a disc core 24 surrounded by a plastic or rubber layer 26. The disk segments are on their legs 28, 30, as well as in Fig. 2 shown provided with projections 32 and recesses 34, which provide for the axial support of the disc transitions. To increase the grinding and mixing capacity, which transfer the grinding elements to the Mahlgut- / Mahlkörpergemisch, the disc segments 14, 16, 18, 20, 22 have slot-shaped apertures 36. The five disc segments 14 to 22 and the centrally arranged one-piece hub are through Screws 40 connected together. The positive connection between the drive shaft and the hub 38 is formed by the insertion of a spring in the groove 42nd

Je nachdem, wie der Übergang der Scheibensegmente 14, 16, 18, 20, 22 gestaltet ist, im Beispiel entsprechend Fig. 2 in stumpfer Ausführungsweise, ändert sich die Befestigung zwischen den Scheibensegmenten 14, 16, 18, 20, 22 und der Nabe. Zur Erhöhung der Stabilität sind die Scheibensegmente, wie in Fig. 3 dargestellt, mit zweifacher Verbindung durch Schrauben 40, 40' mit der Nabe 38 verspannt.Depending on how the transition of the disk segments 14, 16, 18, 20, 22 is designed, in the example accordingly Fig. 2 in a blunt embodiment, the attachment between the disc segments 14, 16, 18, 20, 22 and the hub changes. to Increasing the stability are the disk segments, as in Fig. 3 represented, clamped by a double connection by screws 40, 40 'with the hub 38.

Der in Fig. 4 dargestelle Teilschnitt eines Paares der Scheibensegmente 18', 20' läßt je einen Steg 44, 44' mit entsprechender Kunststoff- oder Gummibeschichtung 26 erkennen.The in Fig. 4 Partial sectional view of a pair of disk segments 18 ', 20' can each have a web 44, 44 'with corresponding plastic or rubber coating 26 recognize.

Bei allen bisherigen Ausführungsbeispielen können von den Mahlelementen zwar die Scheibensegmente 14 bis 22 einzeln entfernt oder ersetzt werden, die Nabe 38 selbst jedoch ist einteilig und umfaßt die Rührwelle. Damit kann die Nabe bzw. die Naben 38 nur durch die Entfernung einzelner oder mehrerer Naben 38 oder eventuell zwischen den Naben angeordneter Distanzbuchsen von der Rührwelle entfernt werden.In all previous embodiments of the grinding elements, although the disk segments 14 to 22 can be removed or replaced individually, but the hub 38 itself is in one piece and includes the stirring shaft. Thus, the hub or hubs 38 can only be removed from the stirrer shaft by the removal of one or more hubs 38 or any spacers between the hubs.

Die Fig. 5 stellt ein Mahlelement 12 dar, das sowohl aus zwei Scheibensegmenten 46, 48, als auch aus zwei Nabenelementen 50, 52 zusammensetzbar ist. In die aus Kunststoff (Polyamid, Polyurethan) gefertigten Scheibenelemente 46, 48 sind Metallverstärkungen 54, 56, 58, 60 eingebracht. Diese Metallverstärkungen 54, 56, 58, 60 sind mittels Schrauben mit der Nabe verbunden. Jedes Scheibensegment 46, 48 ist um beispielsweise 90° versetzt zu den Trennfugen 64, 64' der Nabenelemente 50, 52.The Fig. 5 illustrates a refining element 12 which is composed of both two disc segments 46, 48, as well as two hub elements 50, 52. In the made of plastic (polyamide, polyurethane) disc elements 46, 48 metal reinforcements 54, 56, 58, 60 are introduced. These metal reinforcements 54, 56, 58, 60 are connected by screws to the hub. Each disk segment 46, 48 is offset, for example by 90 °, from the parting lines 64, 64 'of the hub elements 50, 52.

Die Fig. 6 verdeutlicht die Gestaltung der Schenkel der Scheibensegmente 46, 48 nach Fig. 5. Die dargestellte Schwalbenschwanzverbindung, die die beiden Scheibensegmente 46, 48 im Bereich ihrer Schenkel eingehen, erhöht deren Stabilisierung zusätzlich zur Befestigung durch die Schrauben.The Fig. 6 illustrates the design of the legs of the disk segments 46, 48 after Fig. 5 , The illustrated dovetail connection, which enter the two disc segments 46, 48 in the region of their legs, increases their stabilization in addition to the fastening by the screws.

Eine weitere Möglichkeit die Scheibensegmente 65, 66, 68,70 mit der Nabe 38 zu verbinden, zeigen Fig. 7 und Fig. 8. Hier werden die Scheibensegmente im inneren Radiusbereich in Richtung ihrer Rotationsachse A an einem von der Nabe 38 nach außen ragenden Steg befestigt. Jedes der vier Scheibensegmente 65, 66, 68, 70 weist in diesem Überlappungsbereich von Steg 72 und Scheibensegment 65, 66, 68, 70 zwei Schraubverbindungen auf. Die dazu eingesetzten Schrauben 74 durchdringen dabei den Kern 76 der Scheibensegmente 65, 66, 68, 70 und sind mit dem Gewinde im Steg 72 verschraubt. Die Beschichtung 26, die in diesem Bereich ausgespart wird, ergänzt man hier durch einzelne Abdeckungen 78, 80 aus Kunststoff oder Gummi, so daß die höherem Verschleiß ausgesetzte Oberfläche der Scheibensegmente vollständig mit einer Beschichtung versehen ist.Another way to connect the disk segments 65, 66, 68,70 to the hub 38, show FIGS. 7 and 8 , Here, the disk segments are fastened in the inner radius region in the direction of their axis of rotation A on a web projecting outwardly from the hub 38. Each of the four disk segments 65, 66, 68, 70 has two screw connections in this overlapping region of web 72 and disk segment 65, 66, 68, 70. The screws 74 used for this purpose penetrate the core 76 of the disk segments 65, 66, 68, 70 and are bolted to the thread in the web 72. The coating 26, which is recessed in this area, supplemented here by individual covers 78, 80 made of plastic or rubber, so that the higher wear exposed surface of the disk segments is completely provided with a coating.

Entsprechend einer weiteren Variante der Erfindung ist eine direkte Verbindung zweier oder mehrerer Scheibensegmente vorgesehen. Bei diesen Ausführungsbeispielen sind die Scheibensegmente direkt mit und untereinander verschraubt. Hier erstrecken sich Schrauben von den Durchbrüchen bis in das benachbarte Scheibensegment. Alternativ können auch Stiftverbindungen im Bereich der Welle oder Klemmverbindungen zwischen den Vorsprüngen an den Scheibensegmenten für die feste Verbindung sorgen. Bei dieser Verbindungsart ist keine zentrale Nabe im Zentrum der Scheibenelemente vorgesehen.According to a further variant of the invention, a direct connection of two or more disk segments is provided. In these embodiments, the disk segments are bolted directly to and with each other. Here screws extend from the apertures to the adjacent disc segment. Alternatively, pin connections in the area of the shaft or clamping connections between the projections on the disk segments can also provide the firm connection. In this type of connection, no central hub is provided in the center of the disc elements.

Claims (15)

  1. Agitating mill with a grinding receptacle and an agitating shaft rotating therein, on which shaft a plurality of disk-shaped grinding elements (12) in the form of annular disks are disposed in series,
    characterized in that
    each annular disk is composed of a plurality of disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70), whereby an exchange of individual grinding elements (12) is rendered possible without further grinding elements being demounted from the agitating shaft.
  2. Agitating mill according to claim 1, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are connected to a hub (38).
  3. Agitating mill according to claim 2, characterized in that the hub (38) is composed of a plurality of parts and is connected to the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) via releasable connections.
  4. Agitating mill according to claim 3, characterized in that the partition lines (62, 62') between the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are displaced by an angle of 15° to 90° from the partition lines (64, 64') of the hub segments.
  5. Agitating mill according to claim 3 or 4, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 64, 66, 68, 70) are connected to the hub segments by screw connections extending parallel to the rotation axis (A), or radially.
  6. Agitating mill according to claim 5, characterized in that a front side or a rear side or both sides of a disk segment (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are provided with covers (78, 80) in the region of the screw connections, the covers being adapted to be fitted subsequently.
  7. Agitating mill according to any one of claims 2 to 6, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 64, 66, 68, 70) are coated and also connected to the hub (38) by releasable connecting elements, and that the limbs (38, 30) of the disk elements meet at an obtuse angle.
  8. Agitating mill according to any one of claims 2 to 7, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are connected to the hub (38) via screw connections extending from the region of the openings (36) as far as and into the region of the hub (38).
  9. Agitating mill according to any one of claims 2 to 8, characterized in that the hub (38) has a radially extending projection (72) to which the disk segments (65, 66, 68, 70) are fastened.
  10. Agitating mill according to at least one of the preceding claims, characterized in that the annular disc consists of two to five disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) adapted to be clamped to each other.
  11. Agitating mill according to at least one of the preceding claims, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are each supported at their limbs on neighbouring disk segments via a projection and a recess (32, 34).
  12. Agitating mill according to at least one of the preceding claims, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are provided with a synthetic material or rubber coating (26).
  13. Agitating mill according to at least one of the preceding claims, characterized in that the grinding elements (12) consist of two disk segments having groove and tongue connections on their limbs.
  14. Agitating mill according to at least one of the preceding claims, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are directly connected to each other via pin or screw or clamping devices, without a hub being present.
  15. Agitating mill according to at least one of the preceding claims, characterized in that the disk segments (14, 16, 18, 20, 22, 46, 48, 65, 66, 68, 70) are provided with openings (36).
EP03747391A 2002-04-30 2003-04-30 Agitating mill Expired - Lifetime EP1511573B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10219482A DE10219482B4 (en) 2002-04-30 2002-04-30 agitating mill
DE10219482 2002-04-30
PCT/DE2003/001369 WO2003092897A1 (en) 2002-04-30 2003-04-30 Agitating mill

Publications (2)

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EP1511573A1 EP1511573A1 (en) 2005-03-09
EP1511573B1 true EP1511573B1 (en) 2010-06-09

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AT (1) ATE470502T1 (en)
AU (1) AU2003243886B2 (en)
BR (1) BR0304566B1 (en)
CA (1) CA2480738C (en)
DE (2) DE10219482B4 (en)
WO (1) WO2003092897A1 (en)
ZA (1) ZA200406733B (en)

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RU2523078C2 (en) * 2008-12-19 2014-07-20 Экстрейта Текнолоджи Пти Лтд Disc mill
DE102010056287A1 (en) 2010-12-24 2012-06-28 Netzsch-Feinmahltechnik Gmbh Agitator ball mill with active agitator
ES2941458T3 (en) 2013-05-21 2023-05-23 Smidth As F L Methods and apparatus for continuous monitoring of wear in grinding circuits
DE102014101727B3 (en) * 2013-11-08 2015-03-19 Netzsch-Feinmahltechnik Gmbh Wear protection arrangement for an agitator mill
DE102013225662A1 (en) * 2013-12-11 2015-06-11 Invent Umwelt- Und Verfahrenstechnik Ag Stirring device for circulating wastewater and equipment received in a basin
DE102015012588B4 (en) * 2015-09-29 2017-12-28 Khd Humboldt Wedag Gmbh Rotor for a shredding device
CN108176495B (en) * 2017-12-29 2020-06-16 徐州市万达石英有限公司 Automatic grading quartz sand grinding machine and working method thereof
DE102019123138A1 (en) * 2019-08-29 2021-03-04 Netzsch-Feinmahltechnik Gmbh Agitator shaft for an agitator ball mill
DE102019129467A1 (en) 2019-10-31 2021-05-06 Netzsch-Feinmahltechnik Gmbh STIRRER MILL
CN110813144A (en) * 2019-11-28 2020-02-21 衡阳思迈科科技有限公司 Viscosity adjusting device is used in production of electrically conductive silver thick liquid
WO2022016211A1 (en) * 2020-07-20 2022-01-27 Vectis Pty Ltd as trustee for JJB Trust Grinding mill

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DE2626757C2 (en) * 1975-07-09 1984-03-15 Meyer AG Zuchwil, Zuchwil Agitator mill, especially colloid mill
US4021024A (en) * 1976-04-12 1977-05-03 Standard Oil Company (Indiana) Perforated baffle-impeller and process of concentrating dense masses
JPS578925Y2 (en) * 1978-05-22 1982-02-20
US4513917A (en) * 1983-06-16 1985-04-30 Morehouse Industries, Inc. Sand mill rotor discs
KR20020083148A (en) * 2000-01-10 2002-11-01 프리머 밀 코퍼레이션 Fine Media Mill with Improved Disc

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DE10219482B4 (en) 2004-05-27
CA2480738A1 (en) 2003-11-13
ZA200406733B (en) 2005-07-27
DE50312801D1 (en) 2010-07-22
EP1511573A1 (en) 2005-03-09
BR0304566A (en) 2004-07-20
AU2003243886B2 (en) 2006-09-07
ATE470502T1 (en) 2010-06-15
DE10219482A1 (en) 2003-11-20
CA2480738C (en) 2008-04-08
US20050051651A1 (en) 2005-03-10
AU2003243886A1 (en) 2003-11-17
BR0304566B1 (en) 2011-10-04
WO2003092897A1 (en) 2003-11-13

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