EP1468739B1 - Agitator ball mill - Google Patents
Agitator ball mill Download PDFInfo
- Publication number
- EP1468739B1 EP1468739B1 EP04405182A EP04405182A EP1468739B1 EP 1468739 B1 EP1468739 B1 EP 1468739B1 EP 04405182 A EP04405182 A EP 04405182A EP 04405182 A EP04405182 A EP 04405182A EP 1468739 B1 EP1468739 B1 EP 1468739B1
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- EP
- European Patent Office
- Prior art keywords
- grinding
- ball mill
- agitator ball
- agitator
- separating
- 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.)
- Revoked
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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
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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
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/161—Arrangements for separating milling media and ground material
Definitions
- the invention relates to a stirred ball mill with a separating member having the features specified in the preamble of claim 1.
- Agitated ball mills are used, for example, for the comminution and dispersion of solids in a liquid phase or for the digestion of microorganisms.
- the housing of the grinding chamber of a stirred ball mill consists of a longitudinal wall and two arranged at the two ends of the longitudinal wall end walls. It has a good inlet serving for feeding the ground material and a good outlet serving for discharging the material.
- a rotatable about the chamber axis agitator is also arranged to convey the grinding media located in the mill radially to the stirring shaft and thereby comminute the continuously passed through the grinding chamber Good by impact and shear forces or to disperse.
- Agitator ball mills which have to solve this problem various constructions, in such a way that the entrained grinding bodies circulation in the mill is made possible with return to the grinding zone.
- the known solutions are very often insufficient for grinding media D ⁇ 0.1 mm.
- Clogging of the outlet can lead to a significant increase in pressure and prevent the actual grinding and dispersing process.
- grinding media also comes out of the mill and the grinding and dispersing process increasingly deteriorates.
- the millbase is contaminated with grinding media.
- the centrifugal acceleration of the grinding media depends on the speed of the stirring disks and thus also on the property of the product, which, for example, in the case of shear-sensitive products and thus low rotational speeds may lead to a too low centrifugal acceleration of the grinding bodies or to the exit of the grinding bodies.
- Vertical agitated ball mills also have the disadvantage of inhomogeneous media distribution in the milling chamber, resulting in poor grinding or dispersing performance.
- the invention is based on the object to provide a horizontal axis agitator ball mill with a novel separating member which does not have the aforementioned disadvantages and with which a good can be gently and uniformly ground with KleinstmahlMechn having a diameter D ⁇ 0.1 mm, without that they leave the grinding room.
- FIG. 1 a longitudinal section through a part of a horizontal grinding chamber with a separating member of the inventive type
- FIG. 2a a cross section through the in the FIG. 1 represented separating element
- FIG. 2b a section along the line IIb the FIG. 2a
- FIG. 3 a longitudinal section through a second embodiment of the invention
- FIG. 4 a plan view of an alternative embodiment of a separating member of the inventive type.
- the in the FIG. 1 only partly shown and designated as a whole with 50 grinding chamber of a stirred ball mill has a housing 40 with a horizontal axis 60. Der Gezzausehelter 40 ist mit London Genosuse 40sky.
- the housing 40 has an elongated, substantially cylindrical longitudinal wall 30 and two arranged at both ends of the longitudinal wall 30 end walls 35 and 36, of which the end wall 36 serving for supplying the material to be ground good inlet 37 and the end wall 35 a for discharging the Has good serving good outlet 38.
- an agitator 1 is arranged, which has a plurality, for example two, along the axis 60 distributed, paddle wheel-like stirring elements 2.
- the axis 60 coaxial shaft 4 of the agitator 1 is connected with its end wall 36 piercing end to a drive device, not shown in the drawing.
- separating member 80 In the end wall 35 of the grinding chamber 50 is a coaxial with the axis 60 arranged separating member 80 which is connected to an external drive 18. This external drive 18 causes the separating member 80 in a rotational movement independent of the agitator 1.
- the grinding stock outlet 38 leads coaxially to the axis 60 from the separating member 80 to the rotary feedthrough 17th
- a seal 45 is provided in the end wall 35, which ensures that no regrind with grinding media from the annular gap between separating device 80 and end wall 35 penetrates through to the outside. This seal 45 complies with the requirements of the grinding media size ⁇ 0.1mm.
- the separating member 80 has a seated on the shaft 9 and releasably secured to this circular disc 5 and the end wall 35 facing circular disc 7 with a coaxial with the axis 60 arranged, tubular Gut-outlet 38, which projects into the end wall 35 and in the rotary feedthrough 17 ends.
- the two mutually parallel discs 5 and 7 of the separating member 80 are at a predetermined distance from each other. This is determined by a plurality of, around the disk center point symmetrically distributed, from the disk edge inwardly leading, in plan view arcuate conveying or wing elements 12. In the preferred embodiment according to the FIGS. 2a, 2b the circular disc 7 sits on the wing elements 12 and is connected via this with the disc 5 releasably or permanently.
- a ring cage 10 may be further inserted with a screen plate ring 6 located on its outer surface.
- the ring cage 10 is preferably pressed and sealed with O-rings 11 and can be mounted either with or without screen plate ring 6.
- the choice of the use of the screen plate ring 6 can be adapted to the respective product properties.
- a product to be ground or liquid to be dispersed in liquid form is continuously introduced into the interior 3 of the grinding chamber 50 through the inlet 37 and in the direction of arrow 71 and into the grinding stock outlet 38 transported.
- These may, for example, primarily be products from nanotechnology, but also dye suspension, enamel paints, printing inks, agrochemicals, filler suspension, video tape coating composition, cosmetics, foodstuffs, pharmaceuticals or microorganisms.
- the grinding media present in the interior 3 of the grinding chamber 50 grind and / or disperse during the operation of the stirred ball mill the product continuously passed through the grinding chamber 50, whereupon the product produced in the grinding chamber leaves the latter - in a continuous liquid flow - through the separating member 80 in the direction of arrow 72 ,
- the use of small grinding media D ⁇ 0.1 mm is mainly used to break up the agglomerates and aggregates without destroying the primary particles.
- rotating separator 80 is now designed and dimensioned so that the mixture formed from the grinding media and the ground and / or dispersed Good flows into the space between the two discs 5 and 7, whereupon due to the centrifugal force and the different specific gravity for grinding serving grinding media separated by the conveying elements 12 from the material to be ground and transported back into the interior 3 of the grinding chamber 50.
- the millbase itself passes through the circular cavity 8 of the separating member 80 to the Gutauslauf 38, where it leaves the grinding chamber 50. Due to the rotation of the separating member 80, the product must overcome a relative pressure against the centrifugal force when flowing through this separating member.
- This pressure which is between 0.5 and 3bar depending on the operating state, is applied by the feed pump (not shown).
- the housing of the separating member 80 and also the seal 45 on the drive shaft 9 must be pressure-resistant, for the latter is In most cases, the use of a double mechanical seal is required.
- the determining operating variables are the peripheral speed of the separating member 80 and the radial flow velocity in the flow channels.
- the peripheral speed is determined by the speed.
- the radial flow velocity results from the free cross section and the volume flow of the product through the pump.
- the in the FIG. 3 shown grinding chamber 51 corresponds substantially to the grinding chamber according to FIG. 1 , That is, the separating element designated here by 82 is located opposite the agitator 22 on a separate drive shaft and the grinding stock outlet 39 leads coaxially to the axis 61 from the separating member 82 to the rotary feedthrough 17.
- the drive 28 is arranged parallel to the axis 61 in this case and puts the separating shaft 83 bearing shaft via a sub / translation in an independent of the agitator 22 rotational movement.
- a Siebabstreifer 65 is also provided in this variant, which serves to strip off at best on the sieve 6 fixed grinding media, so that no adverse pressure increase takes place and all grinding media can be returned by the rotational movement of the separating member 82 of the grinding chamber.
- a vane-wheel-like separating element 85 which is shown in the view, differs from the separating elements 80 and 82 described above in that, between the arcuate vane elements 12, additionally straight or slightly curved conveying elements 86 are provided, which extend inwards from the edge of the disc. As a result, a secondary flow forms inside.
- the separating members 80 and 82 are optionally provided with or without straight conveying elements 86, the conveying elements 12 and 86 either to the Slices 5 or 7 be attached and it can be equipped with or without screen plate ring 6, the separating elements.
- the sizes of the separating elements are dependent on the peripheral speeds to be selected and can vary greatly from case to case.
- stirring elements described above can numerically arbitrarily combined with each other and / or with other known stirrers and it may be additionally formed with pressure relief valves or the like, the grinding chamber to compensate for any pressure fluctuations, in particular pressure increases.
- the longitudinal wall of the grinding chamber may be additionally enveloped by a cylindrical shell, which together with it defines a circular cross-section, a gap in the cooling or heating of the material present in the interior of a cooling or heating fluid can be introduced.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Die Erfindung betrifft eine Rührwerkskugelmühle mit einem Trennorgan mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen.The invention relates to a stirred ball mill with a separating member having the features specified in the preamble of
Rührwerkskugelmühlen werden beispielsweise zur Zerkleinerung und Dispergierung von Feststoffen in einer Flüssigkeitsphase oder zum Aufschluss von Mikroorganismen verwendet.Agitated ball mills are used, for example, for the comminution and dispersion of solids in a liquid phase or for the digestion of microorganisms.
Auf dem Markt bekannte und für den kontinuierlichen Betrieb vorgesehene Rührwerkskugelmühlen besitzen eine zylindrische, horizontal- oder vertikalachsige Mahlkammer mit verschiedenartigen Trennorganen zum Abtrennen der Mahlkörper vom Produkt im Produktauslassbereich.Known on the market and intended for continuous operation agitator ball mills have a cylindrical, horizontal or vertical axis grinding chamber with various separation organs for separating the grinding media from the product in the Produktauslassbereich.
Das Gehäuse der Mahlkammer einer Rührwerkskugelmühle besteht aus einer Längswand und zwei an den beiden Enden der Längswand angeordneten Abschlusswänden. Es weist einen zum Zuführen des Mahlgutes dienenden Gut-Einlass und einen zum Abführen des Gutes dienenden Gut-Auslass auf. In der Mahlkammer ist zudem ein um die Kammerachse drehbares Rührwerk angeordnet, um die in der Mühle befindlichen Mahlkörper radial zur Rührwelle zu befördern und dadurch das kontinuierlich durch die Mahlkammer hindurchgeleitete Gut durch Stoss- und Scherkräfte zu zerkleinern bzw. zu dispergieren.The housing of the grinding chamber of a stirred ball mill consists of a longitudinal wall and two arranged at the two ends of the longitudinal wall end walls. It has a good inlet serving for feeding the ground material and a good outlet serving for discharging the material. In the grinding chamber, a rotatable about the chamber axis agitator is also arranged to convey the grinding media located in the mill radially to the stirring shaft and thereby comminute the continuously passed through the grinding chamber Good by impact and shear forces or to disperse.
Bei der kontinuierlichen Durchströmung einer Rührwerkskugelmühle tritt abhängig von der Strömungsgeschwindigkeit und von der Viskosität der Mahlgutsuspension eine Schleppkraft auf, die auf die Mahlkörper wirkt. Dadurch werden die Mahlkörper mit dem Mahlgut vom Eintritt in die Mahlzone bis zum Trennorgan im Bereich des Gut-Auslasses mitgeschleppt. Dies kann zu einer Verpressung der Mahlkörper vor dem Trennorgan führen, welche mit erhöhtem Verschleiss und erhöhter Verstopfungsgefahr verbunden ist. Bei Kleinstmahlkörpern mit einem Durchmesser D ≤ 0,1mm nimmt die Mitschleppwirkung des Produktes um ein Vielfaches zu und ist bei Feinstmahlungen und -dispergierungen insbesondere bei hohen Durchsatzraten kritisch.In the continuous flow through an agitator ball mill, depending on the flow velocity and on the viscosity of the millbase suspension, a drag force acts on the grinding bodies. This will be the Grinding medium entrained with the material to be ground from entry into the grinding zone to the separating element in the region of the good outlet. This can lead to a compression of the grinding media before the separating member, which is associated with increased wear and increased risk of clogging. In the case of very small grinding bodies with a diameter D ≤ 0.1 mm, the entrainment effect of the product increases by a multiple and is critical in the case of very fine grinding and dispersing, especially at high throughput rates.
Es sind Rührwerkskugelmühlen bekannt, die zur Lösung dieses Problems verschiedenste Konstruktionen aufweisen, in der Weise, dass den mitgeschleppten Mahlkörpern eine Zirkulation in der Mühle mit Rückführung in die Mahlzone ermöglicht wird. Die bekannten Lösungen sind aber für Mahlkörper D ≤ 0,1mm sehr oft ungenügend.Agitator ball mills are known, which have to solve this problem various constructions, in such a way that the entrained grinding bodies circulation in the mill is made possible with return to the grinding zone. However, the known solutions are very often insufficient for grinding media D ≦ 0.1 mm.
Bei weiteren bekannten Abtrennsystemen, wie zum Beispiel bei der Verwendung von sogenannten Spaltsiebpatronen, gestaltet sich die Fertigung mit kleinen Spaltweiten von ≤ 0,05mm als sehr schwierig, die zudem in der Praxis kaum brauchbar sind. Zudem ist in diesen Fällen die Wahrscheinlichkeit, dass das Sieb verstopft wird, sehr hoch, falls Mahlkörper mit D ≤ 0,1mm benützt werden müssen, was in der Nanotechnologie und somit auch in der Herstellung von Nanoteilchen nötig ist.In other known separation systems, such as in the use of so-called slit screen cartridges, the production with small gap widths of ≤ 0.05 mm designed as very difficult, which are also hardly usable in practice. In addition, in these cases, the likelihood that the screen is clogged, very high, if grinding media with D ≤ 0,1mm must be used, which is necessary in nanotechnology and thus also in the production of nanoparticles.
Ein weiteres Problem entsteht durch den hohen Druckverlust aufgrund der Anreicherung von Mahlkörpern auf dem Sieb. Bei der sogenannten Reibspaltausführung ist eine ausserordentlich hohe Präzision in der Herstellung erforderlich, um die kleinen Reibspalte von ≤ 0.05mm im ganzen Produktionsverlauf zu gewährleisten.Another problem arises from the high pressure loss due to the accumulation of grinding media on the screen. In the so-called Reibspaltausführung an extremely high precision in the production is required to ensure the small friction gaps of ≤ 0.05mm throughout the production process.
Aus der Offenlegungschrift
Eine Verstopfung des Auslasses, eventuell hervorgerufen durch die engen Toleranzen am Gut-Auslass, kann zu einem markanten Druckanstieg führen und den eigentlichen Mahl- und Dispergierprozess unterbinden. Bei Versagen der Abtrennfunktion treten zudem Mahlkörper aus der Mühle aus und der Mahlund Dispergierprozess verschlechtert sich zunehmend. Zudem wird in diesem Fall das Mahlgut mit Mahlkörpern verunreinigt.Clogging of the outlet, possibly caused by the tight tolerances at the product outlet, can lead to a significant increase in pressure and prevent the actual grinding and dispersing process. In case of failure of the separation function, grinding media also comes out of the mill and the grinding and dispersing process increasingly deteriorates. In addition, in this case, the millbase is contaminated with grinding media.
Weitere Vorschläge zur Vermeidung des Verstopfens der Trenneinrichtung werden hauptsächlich für vertikale Rührwerkskugelmühlen beschrieben. Eine solche Erfindung wird in
Eine gattungsbildende Vertikalmühle mit Mahlkörperrückhaltesystem ist aus
Der Erfindung liegt nun die Aufgabe zugrunde, eine horizontalachsige Rührwerkskugelmühle mit einem neuartigen Trennorgan zu schaffen, das die vorgenannten Nachteile nicht aufweist und mit welcher ein Gut schonend und gleichmässig mit Kleinstmahlkörpern gemahlen werden kann, die einen Durchmesser D ≤ 0,1 mm besitzen, ohne dass diese den Mahlraum verlassen.The invention is based on the object to provide a horizontal axis agitator ball mill with a novel separating member which does not have the aforementioned disadvantages and with which a good can be gently and uniformly ground with Kleinstmahlkörpern having a diameter D ≤ 0.1 mm, without that they leave the grinding room.
Diese Aufgabe wird durch eine Rührwerkskugelmühle mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a stirred ball mill having the features of
Vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der abhängigen Ansprüche.Advantageous embodiments of the invention are the subject of the dependent claims.
Nachfolgend werden anhand der Zeichnung Ausführungsbeispiele der Erfindung beschrieben. In der Zeichnung zeigt
die
die
die
die
die
the
the
the
the
the
Die in der
Im Innenraum 3 ist ein Rührwerk 1 angeordnet, das mehrere, beispielsweise zwei, entlang der Achse 60 verteilte, Schaufelrad-artige Rührorgane 2 aufweist. Die zur Achse 60 koaxiale Welle 4 des Rührwerks 1 ist dabei mit ihrem die Abschlusswand 36 durchstossenden Ende an einer in der Zeichnung nicht dargestellten Antriebsvorrichtung angeschlossen.In the
In der Abschlusswand 35 der Mahlkammer 50 befindet sich ein koaxial zur Achse 60 angeordnetes Trennorgan 80, das mit einem externen Antrieb 18 verbunden ist. Dieser externe Antrieb 18 versetzt das Trennorgan 80 in eine vom Rührwerk 1 unabhängige Drehbewegung. Der Mahlgut-Auslass 38 führt koaxial zur Achse 60 vom Trennorgan 80 zur Drehdurchführung 17.In the
In der Abschlusswand 35 ist eine Dichtung 45 vorgesehen, die gewährleistet, dass kein Mahlgut mitsamt Mahlkörpern aus dem Ringspalt zwischen Abtrennvorrichtung 80 und Abschlusswand 35 hindurch nach aussen dringt. Diese Dichtung 45 entspricht den Anforderungen an die Mahlkörpergrösse ≤ 0.1mm.In the
Wie aus den
Die beiden parallel zueinander angeordneten Scheiben 5 und 7 des Trennorgans 80 stehen in vorbestimmtem Abstand voneinander. Dieser wird durch mehrere, um den Scheibenmittelpunkt symmetrisch verteilte, vom Scheibenrand nach innen führende, in der Draufsicht bogenförmige Förder- bzw. Flügelelemente 12 bestimmt. Im bevorzugten Ausführungsbeispiel gemäss den
In einen kreisförmigen Hohlraum 8 zwischen den Scheiben 5 und 7 kann ferner ein Ringkäfig 10 mit einem an seiner Aussenfläche befindlichen Siebblechring 6 eingelegt sein. Der Ringkäfig 10 wird dabei vorzugsweise mit O-Ringen 11 verpresst und abgedichtet und kann wahlweise mit oder ohne Siebblechring 6 montiert sein. Die Wahl des Einsatzes des Siebblechringes 6 kann auf die jeweiligen Produkteigenschaften angepasst werden.In a
Beim Betrieb einer die Mahlkammer 50 aufweisenden Rührwerkskugelmühle wird durch den Einlass 37 und in Pfeilrichtung 71 ein zu mahlendes oder in einer Flüssigkeit zu dispergierendes Gut in flüssiger Form kontinuierlich in den Innenraum 3 der Mahlkammer 50 geführt und in diesem zum Mahlgut-Auslass 38 hinbefördert. Hierbei kann es sich beispielsweise vornehmlich um Produkte aus der Nanotechnologie, aber auch um Farbstoffsuspension, Lackfarben, Druckfarben, Agrochemikalien, Füllstoffsuspension, Video-Tape Beschichtungsmasse, Kosmetika, Nahrungsmittel, Pharma oder Mikroorganismen handeln. Die im Innenraum 3 der Mahlkammer 50 vorhandenen Mahlkörper vermahlen und/oder dispergieren während des Betriebes der Rührwerkskugelmühle das kontinuierlich durch die Mahlkammer 50 hindurchgeleitete Gut, worauf das in der Mahlkammer erzeugte Produkt diese - in einem kontinuierlichen Flüssigkeitsstrom - durch das Trennorgan 80 in Pfeilrichtung 72 verlässt. Der Einsatz von Kleinst-Mahlkörper D ≤ 0,1 mm dient hauptsächlich dazu, die Agglomerate und Aggregate aufzubrechen ohne dass dadurch die Primärteilchen zerstört werden.During operation of a stirred ball mill having the
Das durch den Antrieb 18 angetriebene in Pfeilrichtung 81 (
Um Mahlkörper zu trennen sind die bestimmenden Betriebsgrössen die Umfangsgeschwindigkeit des Trennorgans 80 und die radiale Strömungsgeschwindigkeit in den Strömungskanälen. Die Umfangsgeschwindigkeit wird durch die Drehzahl bestimmt. Die radiale Strömungsgeschwindigkeit ergibt sich aus dem freien Querschnitt und dem Volumenstrom des Produktes durch die Pumpe.In order to separate grinding media, the determining operating variables are the peripheral speed of the separating
Die in der
Das in der
An dieser Stelle sei noch darauf hingewiesen, dass bei einer zur Drehrichtung der Rührwerkswelle entgegengesetzten Rotation des Trennorgans, die Förderelemente gegenüber den in den
Das erfindungsgemässe Abtrennsystem einer Rührwerkskugelmühle für Kleinst-Mahlkörper mit einem Durchmesser D ≤ 0,1 mm weist gegenüber den bekannten Abtrennsystemen folgende Vorteile auf:
- Die Rückhaltung der Kleinst-Mahlkörper im Mahlraum ist durch die geregelte und von der Rührwellen-Drehzahl unabhängige Einstellung der Drehzahl es Trennorgans gewährleistet.
- Die Herstellungsproblematik der Bauteile ist entschärft worden.
- Die Verstopfungsproblematik am Spaltsieb und Siebblech ist durch die Verwendung von einfachen dünnen Geweben entschärft oder beim Weglassen der Siebe eliminiert worden.
- Die Belastung der Abtrennteile ist unbedeutend.
- Verschleiss am Reibspalt ist nicht existent.
- Die Herstellungsprobleme einer sehr engen und genauen Reibspaltkonstruktion sind eliminiert.
- The retention of the smallest grinding media in the grinding chamber is ensured by the regulated and independent of the stirring shaft speed setting the speed of the separating member.
- The manufacturing problem of the components has been defused.
- The clogging problem on the slotted screen and screen plate has been defused by the use of simple thin fabrics or eliminated in the omission of the screens.
- The burden of the separation parts is insignificant.
- Wear on the friction gap is nonexistent.
- The manufacturing problems of a very tight and accurate friction gap design are eliminated.
Es sei an dieser Stelle darauf hingewiesen, dass die anhand der
So können beispielsweise die Trennorgane 80 und 82 wahlweise mit oder ohne geraden Förderelementen 86 versehen werden, die Förderelemente 12 und 86 entweder sowohl an den Scheiben 5 oder 7 befestigt sein und es können die Trennorgane wahlweise mit oder ohne Siebblechring 6 ausgestattet sein. Auch sind die Baugrössen der Trennorgane von den zu wählenden Umfangsgeschwindigkeiten abhängig und können von Fall zu Fall stark variieren.Thus, for example, the separating
Ferner können die vorstehend beschriebenen Rührorganen zahlenmässig beliebig miteinander und/oder auch mit anderen bekannten Rührorganen kombiniert werden und es kann die Mahlkammer noch zusätzlich mit Druckentlastungsventilen oder dergleichen ausgebildet sein, um allfällige Druckschwankungen, insbesondere Druckerhöhungen auszugleichen. Schliesslich kann die Längswand der Mahlkammer noch zusätzlich von einem zylindrischen Mantel umhüllt sein, der mit ihr zusammen einen im Querschnitt kreisförmigen, Zwischenraum begrenzt, in den zum Kühlen oder Erwärmen des im Innenraum vorhandenen Gutes ein Kühl- oder Heizfluid eingeleitet werden kann.Furthermore, the stirring elements described above can numerically arbitrarily combined with each other and / or with other known stirrers and it may be additionally formed with pressure relief valves or the like, the grinding chamber to compensate for any pressure fluctuations, in particular pressure increases. Finally, the longitudinal wall of the grinding chamber may be additionally enveloped by a cylindrical shell, which together with it defines a circular cross-section, a gap in the cooling or heating of the material present in the interior of a cooling or heating fluid can be introduced.
Claims (7)
- Continuously operating horizontal agitator ball mill which serves for the fine grinding and pulverizing of a material, having a cylindrical or conical grinding chamber (50, 51) which serves for accommodating grinding bodies, having a material inlet (37) which is arranged at the end of the grinding chamber (50, 51) and opens out into the interior (3) of the grinding chamber (50, 51), having a material outlet which is arranged at the other end of the grinding chamber and leads out of the interior (3) and having an agitator which comprises a plurality of agitating elements (2) and is coaxial with the chamber axis (60), and also having a separately driven separating system which is arranged upstream of the material outlet and comprises a separating means which has two circular discs (5, 7) which are arranged coaxially with the chamber axis (61) and between which are arranged a plurality of delivery or vane elements which are distributed symmetrically about the disc centre point, characterized in that the separating means (80, 82) is seated on a hollow shaft (9) which is independent of the agitator (1, 22) and in the cavity of which the material outlet (38, 39) is arranged, and in that the delivery or vane elements (12, 86) extend from the periphery of the disc into the vicinity of the material outlet and, during operation of the separating arrangement subject the material/grinding-body mixture to a counterpressure, in which case, on account of the centrifugal force and of the different specific densities, the grinding bodies are separated from the product and delivered back into the interior (3).
- Agitator ball mill according to Claim 1, characterized in that the delivery or vane elements are arcuate.
- Agitator ball mill according to Claim 2, characterized in that, in addition to the arcuate delivery or vane elements (12), rectilinear, or more or less rectilinear, delivery or vane elements (86) are also provided, and these extend inwards from the periphery of the disc.
- Agitator ball mill according to Claim 1, characterized in that the two circular discs (5, 7) are connected to one another in a releasable or non-releasable manner.
- Agitator ball mill according to Claim 1 or 2, characterized in that provided between the two circular discs (5, 7) is an annular cage (10) which rotates along therewith and encloses a circular cavity (8).
- Agitator ball mill according to Claim 3, characterized in that a screen-plate ring (6) is accommodated in the annular cage (10).
- Agitator ball mill according to Claim 6, characterized in that provided on the terminating wall (35) is a screen stripper (65) by means of which any grinding bodies and grinding material which may be adhering to the screen is stripped off and kept in motion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL04405182T PL1468739T3 (en) | 2003-04-15 | 2004-03-24 | Agitator ball mill |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CH6782003 | 2003-04-15 | ||
CH6782003 | 2003-04-15 |
Publications (2)
Publication Number | Publication Date |
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EP1468739A1 EP1468739A1 (en) | 2004-10-20 |
EP1468739B1 true EP1468739B1 (en) | 2008-03-19 |
Family
ID=32873502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP04405182A Revoked EP1468739B1 (en) | 2003-04-15 | 2004-03-24 | Agitator ball mill |
Country Status (8)
Country | Link |
---|---|
US (1) | US7014134B2 (en) |
EP (1) | EP1468739B1 (en) |
JP (1) | JP4205620B2 (en) |
AT (1) | ATE389456T1 (en) |
DE (1) | DE502004006541D1 (en) |
DK (1) | DK1468739T3 (en) |
ES (1) | ES2304157T3 (en) |
PL (1) | PL1468739T3 (en) |
Cited By (4)
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KR100417748B1 (en) * | 1995-06-06 | 2004-05-31 | 고토부키 기켄 고교 가부시키가이샤 | Wet agitation ball mill and grinding method |
DE19819967B4 (en) * | 1998-05-05 | 2007-04-26 | BüHLER GMBH | agitating mill |
-
2004
- 2004-03-24 DK DK04405182T patent/DK1468739T3/en active
- 2004-03-24 AT AT04405182T patent/ATE389456T1/en not_active IP Right Cessation
- 2004-03-24 DE DE502004006541T patent/DE502004006541D1/en not_active Expired - Lifetime
- 2004-03-24 EP EP04405182A patent/EP1468739B1/en not_active Revoked
- 2004-03-24 PL PL04405182T patent/PL1468739T3/en unknown
- 2004-03-24 ES ES04405182T patent/ES2304157T3/en not_active Expired - Lifetime
- 2004-03-31 JP JP2004102868A patent/JP4205620B2/en not_active Expired - Lifetime
- 2004-04-13 US US10/823,131 patent/US7014134B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI503173B (en) * | 2009-04-22 | 2015-10-11 | Ashizawa Finetech Ltd | Medium mixing grinder |
EP2484450B2 (en) † | 2011-02-07 | 2020-08-19 | LIPP Mischtechnik GmbH | Stirring-typ ball mill |
RU2663485C2 (en) * | 2013-07-08 | 2018-08-06 | Неч-Файнмальтехник Гмбх | Mixing ball mill with axial channels |
DE102015105103A1 (en) * | 2015-04-02 | 2016-10-06 | Netzsch-Feinmahltechnik Gmbh | Closure system for the grinding container of a comminution device and grinding container with such a closure system and comminution device with a grinding container |
Also Published As
Publication number | Publication date |
---|---|
EP1468739A1 (en) | 2004-10-20 |
JP2004314066A (en) | 2004-11-11 |
US7014134B2 (en) | 2006-03-21 |
DK1468739T3 (en) | 2008-07-21 |
JP4205620B2 (en) | 2009-01-07 |
ATE389456T1 (en) | 2008-04-15 |
ES2304157T3 (en) | 2008-09-16 |
PL1468739T3 (en) | 2008-10-31 |
DE502004006541D1 (en) | 2008-04-30 |
US20050224612A1 (en) | 2005-10-13 |
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