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EP0627262A1 - Continuously working agitator ball mill for fine and ultrafine milling of material - Google Patents

Continuously working agitator ball mill for fine and ultrafine milling of material Download PDF

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Publication number
EP0627262A1
EP0627262A1 EP94810295A EP94810295A EP0627262A1 EP 0627262 A1 EP0627262 A1 EP 0627262A1 EP 94810295 A EP94810295 A EP 94810295A EP 94810295 A EP94810295 A EP 94810295A EP 0627262 A1 EP0627262 A1 EP 0627262A1
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EP
European Patent Office
Prior art keywords
ball mill
grinding
agitator ball
chamber
disks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94810295A
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German (de)
French (fr)
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EP0627262B1 (en
Inventor
Harald Frommherz
Albert Leuthold
Marc Weider
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Willy A Bachofen AG
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Willy A Bachofen AG
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Publication of EP0627262A1 publication Critical patent/EP0627262A1/en
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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
    • B02C17/163—Stirring means

Definitions

  • the invention relates to an agitator ball mill and a method for fine and very fine grinding of a good, namely an agitator ball mill according to the preamble of claim 1 and a method according to the preamble of claim 14.
  • Agitator ball mills are used, for example, to crush and disperse solids in a liquid phase or to break down microorganisms.
  • Agitator ball mills known on the market and intended for continuous operation have a cylindrical or conical, horizontal or vertical-axis grinding chamber, the housing of which is formed from a longitudinal wall and two end walls arranged at the two ends of the longitudinal wall.
  • One end wall has a good inlet for feeding the regrind and the other end wall has a good outlet for removing the good.
  • the agitators installed in the known agitator ball mills have a plurality of agitating elements which can be rotated coaxially to the chamber axis. These are, for example, in the form of a disk with an essentially circular circumferential line and are subdivided into tapering tines extending in the tangential direction by slots opening into the circumferential line.
  • the grinding media are dragged along by the flow of the material to be ground in the direction of the product outlet, as a result of which the grinding media accumulate in the region of the product outlet and lose their grinding and dispersing action in that they are no longer moved by the agitators of the agitator.
  • the grinding media accumulating in the area of the good outlet during the grinding and dispersing process hinder the continuous discharge of the product flow, which results in an increase in the internal chamber pressure.
  • This increase in the internal chamber pressure ultimately causes the grinding media and also the stirring elements to be exposed to a relatively large amount of mechanical wear during the grinding and / or dispersing process and that the agitator power required to move the stirring elements has to be increased in order to maintain a product flow flowing out uniformly from the grinding chamber .
  • the accumulation of grinding media in the area of the good outlet also causes an increase in the grinding temperature, which can also have a disadvantageous effect on the quality of the product to be produced.
  • the invention is based on the object of creating an agitator ball mill which does not have the disadvantages of the known agitator ball mills and in particular enables a material to be gently and evenly ground.
  • the invention further relates to a method which can be carried out with this agitator ball mill and which is defined by the features of claim 14.
  • the grinding chamber of an agitator ball mill shown only partially in FIG. 1 and designated as a whole by 1 has a housing 2 with a horizontal axis 3.
  • the housing 2 has an elongated, essentially cylindrical longitudinal wall 4 and two end walls 5 and 6 arranged at both ends of the longitudinal wall 4, of which the end wall 5 is a feed inlet 8 for feeding the material to be ground and the end wall 6 one for removing the Has good serving good outlet 9.
  • an agitator 10 which has four paddle wheel-like agitators 12 distributed along the axis 3 and by one not shown in the drawing Drive device can be rotated.
  • the shaft 11 of the agitator 10, which is coaxial with the axis 3, is fastened to the drive device with its end which pierces the end wall 6.
  • each stirring element 12 has a disk 12a facing the end wall 6, an annular disk 12b arranged parallel to the latter, facing the end wall 5 with an opening 12d coaxial with the axis 3, and several, the two disks 12a and 12b connecting conveying elements designed as blades 12c.
  • the latter are arcuate in longitudinal section and connect the disks 12a and 12b to one another.
  • a separating mechanism which is connected to the outlet 9 via an outlet line 15 and is designed here as an annular gap 14 and is dimensioned such that the ground material can flow out of the interior 7, the grinding bodies 13 serving for grinding however be held back.
  • a material to be ground or dispersed in a liquid is conveyed continuously through the inlet 8 into the interior 7 of the grinding chamber 1 and is guided therein to the outlet 9.
  • These can be, for example, dye suspensions, lacquer colors, printing inks, agrochemicals, filler suspensions, video tape coating compositions, cosmetics, foods or microorganisms.
  • the grinding media 13 present in the interior 7 of the grinding chamber 1 grind and / or disperse the material which is continuously passed through the grinding chamber 1 during operation of the agitator ball mill, whereupon the product produced in the grinding chamber leaves it - in a continuous liquid flow - through the separating mechanism 14.
  • the stirring elements 12 rotating in the direction of the arrow 16 during the grinding and / or dispersing process are now designed in this way and dimension that part of the mixture formed from the grinding media 13 and the material to be ground and / or dispersed is continuously conveyed radially outwards in the direction of the arrow 17, whereupon at least part of the mixture in the direction of the arrow 18 to the opening 12d and from there back into the space between the two disks 12a and 12b flows, or is sucked into them.
  • the speed at which the said mixture is moved radially is preferably greater than the speed of the material passed through the grinding chamber 1 - thereby avoiding entrainment of grinding bodies 13 by the axially flowing material - a uniform one can be achieved Adjust the distribution of the grinding media 13 in the interior 7.
  • the speed at which the grinding bodies 13 are moved radially can be greater, for example, by a factor of three to seven than the speed at which the material to be ground flows through the grinding chamber 1.
  • the grinding chamber shown in FIGS. 3 and 5 and designated as a whole by 21 is similar to the grinding chamber 1 described with reference to FIG. 1 and, like this, has a housing 22 formed from a longitudinal wall 23 and two end walls 24 and 25 and a horizontally mounted agitator 26 on.
  • the agitator 26 has a plurality of paddle wheel-like agitators 27, each of which consists of an essentially circular disk 27a, a disk 27b arranged parallel to this, and a plurality of vanes 27c arranged between the disks 27a and 27b.
  • the stirrer 27 shown in FIG. 4 differs from the stirrer 12 in that the disks 27a and 27b are inclined toward the end wall 24 and in that the disk 27b facing the material inlet 8 has the central opening 27d, so that when Operation of the agitator ball mill, the mixture to be moved radially by the stirring elements is sucked in on the side of the stirring elements 27 facing the end wall 24 becomes.
  • the curved shape of the stirring elements 27 now has the additional advantage that when the stirring elements 27 are rotated in the direction of the arrow 28, the grinding media sucked in through the hole 27d are ejected from the stirring element 27 in the direction of the arrow 29 - that is, in the direction opposite to the flow direction of the material. so that even with a relatively high axial speed of the material to be ground and / or to be dispersed in a liquid, a uniform distribution of the grinding media 13 in the interior 7 can be established.
  • the agitator 26 has two different agitators, namely a propeller-like agitator 30 and an impeller-like agitator 36.
  • the stirring element 30 is composed of a propeller 31 and two circular disks 32 and 33.
  • the latter are fastened to the inner wall of the grinding chamber 21 by means of holding arms 34 and each have a hole 32a and 33a which is coaxial with the chamber axis and through which the shaft of the agitator 26 passes.
  • the propeller 31 shown in FIG. 6 has four blades 31a designed as conveying elements, through which the mixture placed in the grinding chamber is conveyed to the disk 32 during operation of the agitator ball mill. In the exemplary embodiment shown in FIG.
  • the diameter of the hole 33a of the disk 33 facing the material inlet is preferably larger than the diameter of the drive shaft, for example twice as large as this, so that during operation of the agitator ball mill at least part of the propeller continuously to the wall 32 transported mixture radially deflected and can flow back in the direction of arrow 35 back into the space between the two disks 32 and 33.
  • the stirring element 30 can be changed in different ways.
  • at least one of the two disks 32 and 33 can be placed on the shaft of the agitator instead of on the inner wall of the grinding chamber 21 26 be attached.
  • a disk serving to suck in the mixture presented in the grinding chamber 21 and fastened without holding arms 34 has at least one central bore or a plurality of individual bores, for example arranged in a circle.
  • propeller-like stirring elements the propellers of which produce conveying directions in opposite directions to one another.
  • the paddle wheel-type stirring member 36 shown in FIG. 7 differs from the stirring members 12 and 27 in that it has three disks 37, 38 and 39 arranged parallel to one another, that between two disks, namely between disks 37 and 38 and the Disks 38 and 39 the blades 40 are arranged such that the two outer disks 37 and 39 each have a central opening 37a and 39a and that the agitating member 36 is fastened to the shaft of the agitator 26 by means of the middle disk 38.
  • the stirring element 36 rotates in the direction of the arrow 41, so that part of the mixture formed from the grinding elements and the material to be ground and / or dispersed is continuously sucked in by the blades 37a and 39a 40 is conveyed radially outwards and again radially inwards over the edges of the disks 37 and 39, so that the circulation represented by the arrows 42 is established on both sides of the stirring element 36.
  • FIGS. 8 and 9 Two further embodiments of stirring elements which serve the same purpose as the stirring elements 12, 27, 30 and 36 described above are shown in FIGS. 8 and 9, respectively.
  • the paddle wheel-type stirring elements 43 and 44 shown in these figures are essentially of the same design as the stirring element 12 shown in FIGS.
  • Disks 43b and 43c or 44b and 44c arranged on both sides of the blades 43a and 44a each have at least one hole, so that during the grinding and / or dispersion process the mixture present in the interior of the grinding chamber is sucked in radially through the blades 43a and 44a on both sides is conveyed outwards, radially inwards over the edges of the two disks and then again into the space between the two disks 43b and 43c or 44b and 44c.
  • the agitator ball mill according to the invention now has the advantage over the known agitator ball mills that a uniform distribution of the grinding media in the grinding chamber, which is not compressed towards the exit, is maintained during the entire grinding and / or dispersing process and that this results in a pressure which is disadvantageous for the production of the product - and temperature increase in the area of the good outlet and increased wear of the apparatus can be largely avoided.
  • stirring elements described above can be combined with one another or with other stirring elements.
  • the outer surfaces 12e facing away from the axis 3 of the blades 12c shown in FIGS. 1 and 2 can form an acute angle with the inner surface of the disk 12b, so that the grinding elements 13 moved by the stirring element 12 - similar to the stirring element 27 - in Direction of flow of the goods are ejected in the opposite direction.
  • the longitudinal wall of the grinding chamber can additionally be encased by a cylindrical jacket which, together with it, delimits a space which is circular in cross section and into which a cooling or heating fluid can be introduced to cool or heat the material present in the interior.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

The continuously working agitator ball mill for fine and ultrafine milling of material, like the already known ball mill, has a cylindrical or conical milling chamber (1) on a horizontal axis. Arranged in the milling chamber (1) is an agitator (10) which is rotatable about the chamber axis (3) and is intended for moving milling elements (13) present in the milling chamber (1). The known agitator ball mills have the disadvantage that the milling elements are carried along in the direction of the outlet (9) by the flow of material passed through from the inlet (8) to the outlet (9), as a result of which these milling elements accumulate in the area of the material outlet and thereby lose their milling effect and adversely affect the milling process. In contrast, the agitator (10) of ball mill according to the invention now has propeller-like bucket-wheel agitating members (12) or propeller-like agitating members (12) formed with separating and guide discs. The agitating members (12) are designed in such a way that a uniform distribution of the milling elements in the interior space of the milling chamber is retained during the milling process so that disadvantages of the known agitator ball mills are removed. <IMAGE>

Description

Die Erfindung betrifft eine Rührwerkskugelmühle sowie ein Verfahren zum Fein- und Feinstmahlen eines Gutes, nämlich eine Rührwerkskugelmühle gemäss dem Oberbegriff des Anspruchs 1 und ein Verfahren gemäss dem Oberbegriff des Anspruchs 14.The invention relates to an agitator ball mill and a method for fine and very fine grinding of a good, namely an agitator ball mill according to the preamble of claim 1 and a method according to the preamble of claim 14.

Rührwerkskugelmühlen werden beispielsweise zur Zerkleinerung und Dispergierung von Feststoffen in einer Flüssigkeitsphase oder zum Aufschluss von Mikroorganismen verwendet.Agitator ball mills are used, for example, to crush and disperse solids in a liquid phase or to break down microorganisms.

Auf dem Markt bekannte und für den kontinuierlichen Betrieb vorgesehene Rührwerkskugelmühlen besitzen eine zylindrische oder konische, horizontal- oder vertikalachsige Mahlkammer, deren Gehäuse aus einer Längswand und zwei an den beiden Enden der Längswand angeordneten Abschlusswänden gebildet ist. Die eine Abschlusswand weist dabei einen zum Zuführen des Mahlgutes dienenden Gut-Einlass und die andere Abschlusswand einen zum Abführen des Gutes dienenden Gut-Auslass auf.Agitator ball mills known on the market and intended for continuous operation have a cylindrical or conical, horizontal or vertical-axis grinding chamber, the housing of which is formed from a longitudinal wall and two end walls arranged at the two ends of the longitudinal wall. One end wall has a good inlet for feeding the regrind and the other end wall has a good outlet for removing the good.

In der Mahlkammer ist zudem ein um die Kammerachse drehbares Rührwerk angeordnet, das dazu dient, die in der Mahlkammer vorhandenen Mahlkörper radial zur Rührwelle zu befördern und dadurch das kontinuierlich durch die Mahlkammer hindurchgeleitete Gut durch Stoss- und Scherkräfte zu zerkleinern. Dazu besitzen die in den bekannten Rührwerkskugelmühlen eingebauten Rührwerke mehrere, koaxial zur Kammerachse drehbare Rührorgane. Diese haben beispielsweise die Form einer Scheibe mit einer im wesentlichen kreisförmigen Umlaufslinie und sind durch in die Umlaufslinie mündende Schlitze in spitz zulaufende, sich in tangentialer Richtung erstreckende Zinken unterteilt.In the grinding chamber there is also an agitator which can be rotated about the chamber axis and which serves to radially convey the grinding media present in the grinding chamber to the stirrer shaft and thereby to crush the material which is continuously passed through the grinding chamber by impact and shear forces. For this purpose, the agitators installed in the known agitator ball mills have a plurality of agitating elements which can be rotated coaxially to the chamber axis. These are, for example, in the form of a disk with an essentially circular circumferential line and are subdivided into tapering tines extending in the tangential direction by slots opening into the circumferential line.

Beim kontinuierlichen Betrieb von bekannten, horizontal- und vertikalachsigen Rührwerkskugelmühlen werden die Mahlkörper durch den Strom des zu mahlenden Gutes in Richtung des Gut-Auslasses mitgeschleppt, wodurch sich die Mahlkörper im Bereich des Gut-Auslasses anhäufen und ihre Mahl- und Dispergierwirkung dadurch verlieren, dass sie nicht mehr durch die Rührorgane des Rührwerkes bewegt werden. Die sich während des Mahl- und Dispergierprozesses im Bereich des Gut-Auslasses anhäufenden Mahlkörper behindern das kontinuierliche Auslaufen des Produktestromes, was eine Erhöhung des Kammerinnendruckes zur Folge hat. Diese Erhöhung des Kammerinnendruckes bewirkt schliesslich, dass die Mahlkörper sowie auch die Rührorgane während des Mahl- und/oder Dispergiervorganges einem verhältnismässig grossen mechanischen Verschleiss ausgesetzt werden und dass zur Erhaltung eines gleichförmig aus der Mahlkammer auslaufenden Produktestromes die zur Bewegung der Rührorgane notwendige Rührwerksleistung erhöht werden muss. Das Anhäufen von Mahlkörpern im Bereich des Gut-Auslasses bewirkt ferner eine Erhöhung der Mahltemperatur, was sich zudem nachteilig auf die Qualität des herzustellenden Produktes auswirken kann.During the continuous operation of known horizontal and vertical axis agitator ball mills, the grinding media are dragged along by the flow of the material to be ground in the direction of the product outlet, as a result of which the grinding media accumulate in the region of the product outlet and lose their grinding and dispersing action in that they are no longer moved by the agitators of the agitator. The grinding media accumulating in the area of the good outlet during the grinding and dispersing process hinder the continuous discharge of the product flow, which results in an increase in the internal chamber pressure. This increase in the internal chamber pressure ultimately causes the grinding media and also the stirring elements to be exposed to a relatively large amount of mechanical wear during the grinding and / or dispersing process and that the agitator power required to move the stirring elements has to be increased in order to maintain a product flow flowing out uniformly from the grinding chamber . The accumulation of grinding media in the area of the good outlet also causes an increase in the grinding temperature, which can also have a disadvantageous effect on the quality of the product to be produced.

Der Erfindung liegt nun die Aufgabe zugrunde, eine Rührwerkskugelmühle zu schaffen, die Nachteile der bekannten Rührwerkskugelmühlen nicht aufweist und insbesondere ermöglicht, ein Gut schonend und gleichmässig zu vermahlen.The invention is based on the object of creating an agitator ball mill which does not have the disadvantages of the known agitator ball mills and in particular enables a material to be gently and evenly ground.

Diese Aufgabe wird durch eine Rührwerkskugelmühle mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by an agitator ball mill with the features of claim 1.

Die Erfindung betrifft ferner ein mit dieser Rührwerkskugelmühle durchführbares Verfahren, das durch die Merkmale des Anspruchs 14 definiert ist.The invention further relates to a method which can be carried out with this agitator ball mill and which is defined by the features of claim 14.

Vorteilhafte Ausgestaltungen der Rührwerkskugelmühle und des Verfahrens gehen aus den abhängigen Ansprüchen hervor.Advantageous refinements of the agitator ball mill and the method emerge from the dependent claims.

Nachfolgend werden anhand der Zeichnung Ausführungsbeispiele der Erfindung beschrieben. In der Zeichnung zeigt

  • die Figur 1 einen Längsschnitt durch einen Teil einer zylindrischen Mahlkammer,
  • die Figur 2 eine Draufsicht auf ein in der Figur 1 dargestelltes Rührorgan,
  • die Figur 3 einen Längsschnitt durch eine zweite Mahlkammer,
  • die Figur 4 eine Draufsicht auf ein in der Figur 3 dargestelltes Rührorgan,
  • die Figur 5 einen Längsschnitt durch eine dritte Mahlkammer,
  • die Figur 6 eine Draufsicht auf ein Teil eines in der Figur 5 dargestellten Rührorganes,
  • die Figur 7 eine Draufsicht auf ein anderes in der Figur 5 dargestelltes Rührorgan;
  • die Figuren 8 und 9 zeigen eine Draufsicht auf zwei weitere Ausführungsformen eines Rührorganes.
Exemplary embodiments of the invention are described below with reference to the drawing. In the drawing shows
  • 1 shows a longitudinal section through part of a cylindrical grinding chamber,
  • FIG. 2 shows a plan view of a stirring element shown in FIG. 1,
  • 3 shows a longitudinal section through a second grinding chamber,
  • FIG. 4 shows a top view of a stirring element shown in FIG. 3,
  • 5 shows a longitudinal section through a third grinding chamber,
  • FIG. 6 shows a plan view of part of a stirring element shown in FIG. 5,
  • FIG. 7 shows a top view of another stirrer shown in FIG. 5;
  • FIGS. 8 and 9 show a top view of two further embodiments of a stirring element.

Die in der Figur 1 nur zum Teil dargestellte und als ganzes mit 1 bezeichnete Mahlkammer einer Rührwerkskugelmühle weist ein Gehäuse 2 mit einer horizontalen Achse 3 auf. Das Gehäuse 2 besitzt dabei eine längliche, im wesentlichen zylindrische Längswand 4 sowie zwei an beiden Enden der Längswand 4 angeordnete Abschlusswände 5 und 6, von denen die Abschlusswand 5 einen zum Zuführen des Mahlgutes dienenden Gut-Einlass 8 und die Abschlusswand 6 einen zum Abführen des Gutes dienenden Gut-Auslass 9 aufweist.The grinding chamber of an agitator ball mill shown only partially in FIG. 1 and designated as a whole by 1 has a housing 2 with a horizontal axis 3. The housing 2 has an elongated, essentially cylindrical longitudinal wall 4 and two end walls 5 and 6 arranged at both ends of the longitudinal wall 4, of which the end wall 5 is a feed inlet 8 for feeding the material to be ground and the end wall 6 one for removing the Has good serving good outlet 9.

Im Innenraum 7 ist ferner ein Rührwerk 10 angeordnet, das vier entlang der Achse 3 verteilte, Schaufelrad-artige Rührorgane 12 aufweist und durch eine in der Zeichnung nicht dargestellte Antriebsvorrichtung gedreht werden kann. Die zur Achse 3 koaxiale Welle 11 des Rührwerkes 10 ist dabei mit seinem, die Abschlusswand 6 durchstossenden Ende an der Antriebsvorrichtung befestigt.In the interior 7 there is also an agitator 10 which has four paddle wheel-like agitators 12 distributed along the axis 3 and by one not shown in the drawing Drive device can be rotated. The shaft 11 of the agitator 10, which is coaxial with the axis 3, is fastened to the drive device with its end which pierces the end wall 6.

Wie aus den Figuren 1 und 2 ersichtlich ist, besitzt jedes Rührorgan 12 eine der Abschlusswand 6 zugewandte Scheibe 12a, eine zu dieser parallel angeordnete, der Abschlusswand 5 zugewandte ringförmige Scheibe 12b mit einer zur Achse 3 koaxialen Öffnung 12d sowie mehrere, die beiden Scheiben 12a und 12b miteinander verbindende und als Schaufeln 12c ausgebildete Förderelemente. Letztere sind im Längsschnitt bogenförmig und verbinden die Scheiben 12a und 12b miteinander.As can be seen from FIGS. 1 and 2, each stirring element 12 has a disk 12a facing the end wall 6, an annular disk 12b arranged parallel to the latter, facing the end wall 5 with an opening 12d coaxial with the axis 3, and several, the two disks 12a and 12b connecting conveying elements designed as blades 12c. The latter are arcuate in longitudinal section and connect the disks 12a and 12b to one another.

In der Abschlusswand 6 der Mahlkammer 1 ist schliesslich ein über eine Auslaufleitung 15 mit dem Auslass 9 verbundener, hier als Ringspalt 14 ausgebildeter Trennmechanismus vorhanden, der so bemessen ist, dass das gemahlene Gut aus dem Innenraum 7 ausströmen kann, die zum Mahlen dienenden Mahlkörper 13 jedoch zurückgehalten werden.Finally, in the end wall 6 of the grinding chamber 1 there is a separating mechanism which is connected to the outlet 9 via an outlet line 15 and is designed here as an annular gap 14 and is dimensioned such that the ground material can flow out of the interior 7, the grinding bodies 13 serving for grinding however be held back.

Beim Betrieb einer die Mahlkammer 1 aufweisenden Rührwerkskugelmühle wird durch den Einlass 8 ein zu mahlendes oder in einer Flüssigkeit zu dispergierendes Gut in flüssiger Form kontinuierlich in den Innenraum 7 der Mahlkammer 1 befördert und in diesem zum Auslass 9 geführt. Hierbei kann es sich beispielsweise um Farbstoffsuspensionen, Lackfarben, Druckfarben, Agrochemikalien, Füllstoffsuspensionen, Video-Tape-Beschichtungsmassen, Kosmetika, Nahrungsmittel oder Mikroorganismen handeln. Die im Innenraum 7 der Mahlkammer 1 vorhandenen Mahlkörper 13 vermahlen und/oder dispergieren während des Betriebes der Rührwerkskugelmühle das kontinuierlich durch die Mahlkammer 1 hindurchgeleitete Gut, worauf das in der Mahlkammer erzeugte Produkt diesen - in einem kontinuierlichen Flüssigkeitsstrom - durch den Trennmechanismus 14 verlässt.When an agitator ball mill having the grinding chamber 1 is in operation, a material to be ground or dispersed in a liquid is conveyed continuously through the inlet 8 into the interior 7 of the grinding chamber 1 and is guided therein to the outlet 9. These can be, for example, dye suspensions, lacquer colors, printing inks, agrochemicals, filler suspensions, video tape coating compositions, cosmetics, foods or microorganisms. The grinding media 13 present in the interior 7 of the grinding chamber 1 grind and / or disperse the material which is continuously passed through the grinding chamber 1 during operation of the agitator ball mill, whereupon the product produced in the grinding chamber leaves it - in a continuous liquid flow - through the separating mechanism 14.

Die sich während des Mahl-und/oder Dispergierprozesses in Pfeilrichtung 16 drehenden Rührorgane 12 sind nun derart ausgebildet und bemessen, dass fortlaufend ein Teil des aus den Mahlkörpern 13 und dem zu mahlenden und/oder zu dispergierenden Gut gebildeten Gemisches in Pfeilrichtung 17 radial nach aussen befördert wird, worauf mindestens ein Teil des Gemisches in Pfeilrichtung 18 zur Öffnung 12d und von dort zurück in den Zwischenraum zwischen den beiden Scheiben 12a und 12b strömt, bzw. in diesen eingesaugt wird. Dadurch und dadurch, dass die Geschwindigkeit, mit der das genannte Gemisch radial bewegt wird, vorzugsweise grösser ist als die Geschwindigkeit des durch die Mahlkammer 1 hindurchgeleiteten Gutes - wodurch ein Mitschleppen von Mahlkörpern 13 durch das axial durchfliessende Gut vermieden wird -, kann sich eine gleichmässige Verteilung der Mahlkörpern 13 im Innenraum 7 einstellen. Die Geschwindigkeit, mit der die Mahlkörper 13 radial bewegt werden, kann dabei beispielsweise um etwa einen Faktor drei bis sieben grösser sein als die Geschwindigkeit, mit der das zu mahlende Gut durch die Mahlkammer 1 hindurchströmt.The stirring elements 12 rotating in the direction of the arrow 16 during the grinding and / or dispersing process are now designed in this way and dimension that part of the mixture formed from the grinding media 13 and the material to be ground and / or dispersed is continuously conveyed radially outwards in the direction of the arrow 17, whereupon at least part of the mixture in the direction of the arrow 18 to the opening 12d and from there back into the space between the two disks 12a and 12b flows, or is sucked into them. Because of this and because the speed at which the said mixture is moved radially is preferably greater than the speed of the material passed through the grinding chamber 1 - thereby avoiding entrainment of grinding bodies 13 by the axially flowing material - a uniform one can be achieved Adjust the distribution of the grinding media 13 in the interior 7. The speed at which the grinding bodies 13 are moved radially can be greater, for example, by a factor of three to seven than the speed at which the material to be ground flows through the grinding chamber 1.

Die in den Figuren 3 und 5 dargestellte und als ganzes mit 21 bezeichnete Mahlkammer ist ähnlich wie die anhand der Figur 1 beschriebene Mahlkammer 1 ausgebildet und weist wie diese ein aus einer Längswand 23 und zwei Abschlusswänden 24 und 25 gebildetes Gehäuse 22 sowie ein horizontal gelagertes Rührwerk 26 auf.The grinding chamber shown in FIGS. 3 and 5 and designated as a whole by 21 is similar to the grinding chamber 1 described with reference to FIG. 1 and, like this, has a housing 22 formed from a longitudinal wall 23 and two end walls 24 and 25 and a horizontally mounted agitator 26 on.

In der Figur 3 weist das Rührwerk 26 mehrere, Schaufelradartige Rührorgane 27 auf, die je aus einer im wesentlichen kreisförmigen Scheibe 27a, einer parallel zu dieser angeordneten Scheibe 27b und mehreren zwischen den Scheiben 27a und 27b angeordneten Schaufeln 27c bestehen. Das in der Figur 4 in Ansicht dargestellte Rührorgan 27 unterscheidet sich von dem Rührorgan 12 dadurch, dass die Scheiben 27a und 27b zur Abschlusswand 24 hin geneigt sind und dass die dem Gut-Einlass 8 zugewandte Scheibe 27b die zentrale Öffnung 27d aufweist, so dass beim Betrieb der Rührwerkskugelmühle das durch die Rührorgane radial zu bewegende Gemisch jeweils auf der der Abschlusswand 24 zugwandten Seite der Rührorgane 27 eingesaugt wird. Die gekrümmte Form der Rührorgane 27 hat nun den zusätzlichen Vorteil, dass beim Drehen der Rührorgane 27 in Richtung des Pfeiles 28 die durch das Loch 27d angesaugten Mahlkörper in Pfeilrichtung 29 aus dem Rührorgan 27 - also in zur Strömungsrichtung des Gutes entgegengesetzter Richtung - ausgeworfen werden, so dass sich dadurch auch bei einer verhältnismässig grossen axialen Geschwindigkeit des zu mahlenden und/oder in einer Flüssigkeit zu dispergierenden Gutes eine gleichmässige Verteilung der Mahlkörpern 13 im Innenraum 7 einstellen kann.In FIG. 3, the agitator 26 has a plurality of paddle wheel-like agitators 27, each of which consists of an essentially circular disk 27a, a disk 27b arranged parallel to this, and a plurality of vanes 27c arranged between the disks 27a and 27b. The stirrer 27 shown in FIG. 4 differs from the stirrer 12 in that the disks 27a and 27b are inclined toward the end wall 24 and in that the disk 27b facing the material inlet 8 has the central opening 27d, so that when Operation of the agitator ball mill, the mixture to be moved radially by the stirring elements is sucked in on the side of the stirring elements 27 facing the end wall 24 becomes. The curved shape of the stirring elements 27 now has the additional advantage that when the stirring elements 27 are rotated in the direction of the arrow 28, the grinding media sucked in through the hole 27d are ejected from the stirring element 27 in the direction of the arrow 29 - that is, in the direction opposite to the flow direction of the material. so that even with a relatively high axial speed of the material to be ground and / or to be dispersed in a liquid, a uniform distribution of the grinding media 13 in the interior 7 can be established.

In der Figur 5 weist das Rührwerk 26 zwei verschiedene Rührorgane auf, nämlich ein propellerartiges Rührorgan 30 und ein Schaufelrad-artiges Rührorgan 36.In FIG. 5, the agitator 26 has two different agitators, namely a propeller-like agitator 30 and an impeller-like agitator 36.

Das Rührorgan 30 setzt sich dabei aus einem Propeller 31 und zwei kreisförmigen Scheiben 32 und 33 zusammen. Letztere sind mittels Haltearmen 34 an der Innenwand der Mahlkammer 21 befestigt und weisen je ein zur Kammerachse koaxiales Loch 32a und 33a auf, durch das die Welle des Rührwerkes 26 hindurchführt. Der in der Figur 6 in Ansicht dargestellte Propeller 31 besitzt vier als Förderelemente ausgebildete Flügel 31a, durch die während des Betriebes der Rührwerkskugelmühle das in der Mahlkammer vorgelegte Gemisch zur Scheibe 32 befördert wird. Der Durchmesser des Loches 33a der dem Gut-Einlass zugewandten Scheibe 33 ist in dem in der Figur 5 dargestellten Ausführungsbeispiel vorzugsweise grösser als der Durchmesser der Antriebswelle, beispielsweise doppelt so gross wie diese, so dass beim Betrieb der Rührwerkskugelmühle fortlaufend mindestens ein Teil des vom Propeller an die Wand 32 beförderten Gemisches radial abgelenkt und in Pfeilrichtung 35 wieder zurück in den Zwischenraum zwischen den beiden Scheiben 32 und 33 strömen kann.The stirring element 30 is composed of a propeller 31 and two circular disks 32 and 33. The latter are fastened to the inner wall of the grinding chamber 21 by means of holding arms 34 and each have a hole 32a and 33a which is coaxial with the chamber axis and through which the shaft of the agitator 26 passes. The propeller 31 shown in FIG. 6 has four blades 31a designed as conveying elements, through which the mixture placed in the grinding chamber is conveyed to the disk 32 during operation of the agitator ball mill. In the exemplary embodiment shown in FIG. 5, the diameter of the hole 33a of the disk 33 facing the material inlet is preferably larger than the diameter of the drive shaft, for example twice as large as this, so that during operation of the agitator ball mill at least part of the propeller continuously to the wall 32 transported mixture radially deflected and can flow back in the direction of arrow 35 back into the space between the two disks 32 and 33.

Hierbei sei noch bemerkt, dass das Rührorgan 30 in verschiedener hinsicht geändert werden kann. So kann wahlweise mindestens eine der beiden Scheiben 32 bzw. 33 - anstelle an der Innenwand der Mahlkammer 21 - auch auf der Welle des Rührwerkes 26 befestigt sein. Eine zum Einsaugen des in der Mahlkammer 21 vorgelegten Gemisches dienende Scheibe, die ohne Haltearme 34 befestigt ist, weist dabei - im Gegensatz zur in der Figur 5 dargestellten Scheibe 33 - mindestens eine zentrale Bohrung oder mehrere, beispielsweise kreisförmig angeordnete Einzelbohrungen auf. Ferner besteht auch noch die Möglichkeit, mehrere propellerartige Rührorgane miteinander zu kombinieren, deren Propeller zueinander gegenläufige Förderrichtungen erzeugen.It should also be noted here that the stirring element 30 can be changed in different ways. For example, at least one of the two disks 32 and 33 can be placed on the shaft of the agitator instead of on the inner wall of the grinding chamber 21 26 be attached. In contrast to the disk 33 shown in FIG. 5, a disk serving to suck in the mixture presented in the grinding chamber 21 and fastened without holding arms 34 has at least one central bore or a plurality of individual bores, for example arranged in a circle. Furthermore, there is also the possibility of combining several propeller-like stirring elements, the propellers of which produce conveying directions in opposite directions to one another.

Das in der Figur 7 in Ansicht dargestellte Schaufelradartige Rührorgan 36 unterscheidet sich von den Rührorganen 12 und 27 dadurch, dass es drei zueinander parallel angeordnete Scheiben 37, 38 und 39 aufweist, dass zwischen jeweils zwei Scheiben, nämlich zwischen den Scheiben 37 und 38 und den Scheiben 38 und 39 die Schaufeln 40 angeordnet sind, dass die beiden äusseren Scheiben 37 und 39 je eine zentrale Öffnung 37a bzw. 39a aufweisen und dass das Rührorgan 36 mittels der mittlere Scheibe 38 an der Welle des Rührwerkes 26 befestigt ist.The paddle wheel-type stirring member 36 shown in FIG. 7 differs from the stirring members 12 and 27 in that it has three disks 37, 38 and 39 arranged parallel to one another, that between two disks, namely between disks 37 and 38 and the Disks 38 and 39 the blades 40 are arranged such that the two outer disks 37 and 39 each have a central opening 37a and 39a and that the agitating member 36 is fastened to the shaft of the agitator 26 by means of the middle disk 38.

Während des Mahl-und/oder Dispergierprozesses dreht sich das Rührorgan 36 in Pfeilrichtung 41, so dass fortlaufend ein Teil des aus den Mahlkörpern und dem zu mahlenden und/oder zu dispergierenden Gut gebildeten Gemisches durch die beiden Löcher 37a und 39a angesaugt, von den Schaufeln 40 radial nach aussen und über die Ränder der Scheiben 37 und 39 wieder radial nach innen befördert wird, so dass sich dadurch auf beiden Seiten des Rührorganes 36 die durch die Pfeile 42 dargestellte Zirkulation einstellt.During the grinding and / or dispersing process, the stirring element 36 rotates in the direction of the arrow 41, so that part of the mixture formed from the grinding elements and the material to be ground and / or dispersed is continuously sucked in by the blades 37a and 39a 40 is conveyed radially outwards and again radially inwards over the edges of the disks 37 and 39, so that the circulation represented by the arrows 42 is established on both sides of the stirring element 36.

Zwei weitere Ausführungsformen von Rührorganen, die dem gleichen Zweck dienen wie die vorstehend beschriebenen Rührorgane 12, 27, 30 und 36 sind in den Figuren 8 bzw. 9 dargestellt. Die in diesen Figuren dargestellten Schaufelradartigen Rührorgane 43 und 44 sind im wesentlichen gleich ausgebildet wie das in den Figuren 1 und 2 dargestellte Rührorgan 12, unterscheiden sich von diesem aber dadurch, dass die beidseits der Schaufeln 43a bzw. 44a angeordneten Scheiben 43b und 43c bzw. 44b und 44c je mindestens ein Loch aufweisen, so dass beim Mahl- und/oder Dispergierprozess das im Innenraum der Mahlkammer vorhandene Gemisch beidseitig angesaugt, durch die Schaufeln 43a bzw. 44a radial nach aussen, über die Ränder der beiden Scheiben radial nach innen und anschliessend wieder in den Zwischenraum zwischen den beiden Scheiben 43b und 43c bzw. 44b und 44c befördert wird.Two further embodiments of stirring elements which serve the same purpose as the stirring elements 12, 27, 30 and 36 described above are shown in FIGS. 8 and 9, respectively. The paddle wheel-type stirring elements 43 and 44 shown in these figures are essentially of the same design as the stirring element 12 shown in FIGS. 1 and 2, but differ from this in that the Disks 43b and 43c or 44b and 44c arranged on both sides of the blades 43a and 44a each have at least one hole, so that during the grinding and / or dispersion process the mixture present in the interior of the grinding chamber is sucked in radially through the blades 43a and 44a on both sides is conveyed outwards, radially inwards over the edges of the two disks and then again into the space between the two disks 43b and 43c or 44b and 44c.

Die erfindungsgemässe Rührwerkskugelmühle weist nun gegenüber den bekannten Rührwerkskugelmühlen den Vorteil auf, dass während des ganzen Mahl- und/oder Dispergierprozesses eine gleichmässige, zum Ausgang hin nicht verdichtete Verteilung der Mahlkörper in der Mahlkammer erhalten bleibt und dass dadurch eine für die Herstellung des Produktes nachteilige Druck - und Temperaturerhöhung im Bereich des Gut-Auslasses sowie ein erhöhter Verschleiss der Apparatur weitgehend vermieden werden kann.The agitator ball mill according to the invention now has the advantage over the known agitator ball mills that a uniform distribution of the grinding media in the grinding chamber, which is not compressed towards the exit, is maintained during the entire grinding and / or dispersing process and that this results in a pressure which is disadvantageous for the production of the product - and temperature increase in the area of the good outlet and increased wear of the apparatus can be largely avoided.

Es sei an dieser Stelle darauf hingewiesen, dass die anhand der Figuren 1 bis 7 beschriebenen Mahlkammern und Rührorgane nur eine Auswahl von mehreren möglichen Ausführungsformen der Erfindung darstellen und in verschiedener Hinsicht geändert werden können.It should be pointed out at this point that the grinding chambers and stirring elements described with reference to FIGS. 1 to 7 represent only a selection of several possible embodiments of the invention and can be changed in various respects.

So können beispielsweise die vorstehend beschriebenen Rührorgane beliebig miteinander oder auch mit anderen Rührorganen kombiniert werden.For example, the stirring elements described above can be combined with one another or with other stirring elements.

Zudem können beispielsweise die der Achse 3 abgewandten Aussenflächen 12e der in den Figuren 1 und 2 dargestellten Schaufeln 12c mit der Innenfläche der Scheibe 12b einen spitzen Winkel bildet, so dass die vom Rührorgan 12 bewegten Mahlkörper 13 - ähnlich wie bei dem Rührorgan 27 - in zur Strömungsrichtung des Gutes entgegengesetzter Richtung ausgeworfen werden.In addition, for example, the outer surfaces 12e facing away from the axis 3 of the blades 12c shown in FIGS. 1 and 2 can form an acute angle with the inner surface of the disk 12b, so that the grinding elements 13 moved by the stirring element 12 - similar to the stirring element 27 - in Direction of flow of the goods are ejected in the opposite direction.

Schliesslich kann die Längswand der Mahlkammer noch zu sätzlich von einem zylindrischen Mantel umhüllt sein, der mit ihr zusammen einen im Querschnitt kreisringförmigen, Zwischenraum begrenzt, in den zum Kühlen oder Erwärmen des im Innenraum vorhandenen Gutes ein Kühl- oder Heizfluid eingeleitet werden kann.Finally, the longitudinal wall of the grinding chamber can additionally be encased by a cylindrical jacket which, together with it, delimits a space which is circular in cross section and into which a cooling or heating fluid can be introduced to cool or heat the material present in the interior.

Claims (11)

Zum Fein- und Feinstmahlen eines Gutes dienende, kontinuierlich arbeitende Rührwerkskugelmühle mit einer zylindrischen oder konischen, zur Aufnahme von Mahlkörpern (13) dienenden Mahlkammer (1,21), einem am einen Ende (5,24) der Mahlkammer (1,21) angeordneten und in den Innenraum (7) der Mahlkammer (1,21) mündenden Gut-Einlass (8) und einem am anderen Ende (6,25) der Mahlkammer (1,21) angeordneten und aus dem Innenraum (7) herausführenden Gut-Auslass (9) sowie einem Rührorgane (12,27,30,36,43,44) aufweisenden und zur Kammerachse (3) koaxialen Rührwerk (10,26) zum Bewegen der Mahlkörper (13), wobei die Rührorgane (12,27,30,36,43,44) Schaufelrad- oder propellerartig ausgebildet sind und mehrere Förderelemente aufweisen, dadurch gekennzeichnet, dass beidseits der Förderelemente je eine kreisförmige Scheibe (12a,12b;27a,27b; 32,33,43b,43c;44b,44c) angeordnet ist, dass mindestens eine der beiden Scheiben (12b,27b,33,43b,44b,44c) mindestens eine zentrale Öffnung (12d,27d,33a) aufweist, durch welche das aus den Mahlkörpern (13) und dem zu mahlenden Gut gebildete Gemisch hindurchströmen kann, und dass die Rührorgane (12,27,30, 36,43,44) derart ausgebildet und bemessen sind, dass beim Betrieb der Rührwerkskugelmühle fortlaufend ein Teil des Gemisches über den Rand der die zentrale Öffnung aufweisenden Scheibe (12b,27b,33,43b,44b,44c) radial nach innen zur zentralen Öffnung (12d,27d,33a) und von dort in den Zwischenraum zwischen den Scheiben (12a,12b;27a,27b;32,33,43b,43c; 44b,44c) zurückströmt und dass dadurch eine gleichmässige axiale Verteilung der Mahlkörper im Innenraum (7) der Mahlkammer (1,21) erhalten bleibt.Continuous agitator ball mill for fine and ultra-fine grinding of a good with a cylindrical or conical grinding chamber (1,21) for receiving grinding media (13), one at one end (5,24) of the grinding chamber (1,21) and into the interior (7) of the grinding chamber (1,21) opening material inlet (8) and at the other end (6,25) of the grinding chamber (1,21) arranged and out of the interior (7) leading outlet (9) and a stirrer (12,27,30,36,43,44) and coaxial to the chamber axis (3) stirrer (10,26) for moving the grinding media (13), the stirrer (12,27,30 , 36, 43, 44) are designed in the manner of a paddle wheel or propeller and have a plurality of conveying elements, characterized in that a circular disk (12a, 12b; 27a, 27b; 32,33,43b, 43c; 44b, 44c) is located on each side of the conveying elements. it is arranged that at least one of the two disks (12b, 27b, 33, 43b, 44b, 44c) has at least one central opening (12d, 27d, 33a) shows through which the mixture formed from the grinding media (13) and the material to be ground can flow, and that the stirring elements (12, 27, 30, 36, 43, 44) are designed and dimensioned such that the agitator ball mill is in operation continuously a part of the mixture radially inwards over the edge of the disc (12b, 27b, 33,43b, 44b, 44c) having the central opening to the central opening (12d, 27d, 33a) and from there into the space between the discs (12a , 12b; 27a, 27b; 32,33,43b, 43c; 44b, 44c) and that a uniform axial distribution of the grinding media in the interior (7) of the grinding chamber (1,21) is maintained. Rührwerkskugelmühle nach Anspruch 1, dadurch gekennzeichnet, dass das Rührorgan (12,27,43,44) mehrere, im Längsschnitt bogenförmige und sich in tangentialer Richtung zu den Scheibenränder erstreckende Schaufeln (12c,27c,40,43a,44a) aufweist, die mit den beiden Scheiben (12a,12b;27a,27b;43b, 43c;44b,44c) einen einstückigen Körper bilden.Agitator ball mill according to claim 1, characterized in that the agitating element (12, 27, 43, 44) has a plurality of blades (12c, 27c, 40, 43a, 44a) which are arcuate in longitudinal section and extend in the tangential direction to the disc edges, and which form the two disks (12a, 12b; 27a, 27b; 43b, 43c; 44b, 44c) as one piece. Rührwerkskugelmühle nach Anspruch 2, dadurch gekennzeichnet, dass die beiden kreisförmigen Scheiben (12a,12b) senkrecht zur Kammerachse (3) angeordnet sind.Agitator ball mill according to claim 2, characterized in that the two circular disks (12a, 12b) are arranged perpendicular to the chamber axis (3). Rührwerkskugelmühle nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die dem Gut-Einlass (8) zugewandte Scheibe (12b,27b) die zentrale Öffnung (12d,27d) aufweist.Agitator ball mill according to claim 2 or 3, characterized in that the disc (12b, 27b) facing the material inlet (8) has the central opening (12d, 27d). Rührwerkskugelmühle nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass beide Scheiben je eine zentrale Öffnung aufweisen.Agitator ball mill according to claim 2 or 3, characterized in that both disks each have a central opening. Rührwerkskugelmühle nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Schaufeln (12c,27c) senkrecht zu den beiden Scheiben (12a,12b; 27a,27b) stehen.Agitator ball mill according to one of claims 2 to 5, characterized in that the blades (12c, 27c) are perpendicular to the two disks (12a, 12b; 27a, 27b). Rührwerkskugelmühle nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die der Kammerachse (3) abgewandte Aussenfläche der Schaufel mit der Innenfläche der dem Gut-Einlass zugewandten Scheibe einen spitzen Winkel bildet.Agitator ball mill according to one of claims 2 to 5, characterized in that the outer surface of the blade facing away from the chamber axis (3) forms an acute angle with the inner surface of the disk facing the material inlet. Rührwerkskugelmühle nach Anspruch 1, dadurch gekennzeichnet, dass das Rührorgan (36) mindestens drei Scheiben (37,38,39) aufweist, dass zwischen jeweils zwei Scheiben (37,38,38;39), mehrere im Längsschnitt bogenförmige und sich in tangentialer Richtung zu den Scheibenränder erstreckende Schaufeln (40) angeordnet sind und dass die beiden äusseren Scheiben (37,39) je eine zentrale Öffnung (37a,39a) aufweisen.Agitator ball mill according to claim 1, characterized in that the stirring member (36) has at least three disks (37,38,39), that between each two disks (37,38,38; 39), several arcuate in longitudinal section and in the tangential direction Blades (40) extending to the disc edges are arranged and that the two outer discs (37, 39) each have a central opening (37a, 39a). Rührwerkskugelmühle nach Anspruch 1, dadurch gekennzeichnet, dass die beidseits der Förderelemente eines Rührorganes angeordneten Scheiben (32,33) je ein zur Kammerachse koaxiales Loch (33a) aufweisen, durch das die Welle des Rührwerkes (26) hindurchführt und dass die Scheiben (32,33) wahlweise mittels Haltearmen (34) an der Innenwand der Mahlkammer (21) oder an der genannten Welle befestigt sind.Agitator ball mill according to claim 1, characterized in that the disks (32, 33) arranged on both sides of the conveying elements of an agitating member each have a hole (33a) coaxial with the chamber axis through which the shaft of the agitator (26) passes and that the disks (32, 33) are attached either by means of holding arms (34) to the inner wall of the grinding chamber (21) or to the shaft mentioned. Verfahren zum Fein- und Feinstmahlen eines Gutes in einer Rührwerkskugelmühle nach einem der Ansprüche 1 bis 9, wobei die Rührorgane (12,27,30,36,43,44) in der Richtung gedreht werden, die eine radiale Bewegung der Mahlkörper (13) nach aussen zur Folge hat, dadurch gekennzeichnet, dass die Geschwindigkeit, mit der die Mahlkörper (13) radial bewegt werden, grösser ist als die Geschwindigkeit, mit der das zu mahlende Gut durch die Mahlkammer (1,21) hindurchgeleitet wird.Method for fine and very fine grinding of a material in an agitator ball mill according to one of claims 1 to 9, wherein the agitating elements (12, 27, 30, 36, 43, 44) are rotated in the direction which corresponds to a radial movement of the grinding bodies (13) to the outside, characterized in that the speed at which the grinding bodies (13) are moved radially is greater than the speed at which the material to be ground is passed through the grinding chamber (1, 21). Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Geschwindigkeit, mit der die Mahlkörper (13) radial bewegt werden, um etwa einen Faktor drei bis sieben grösser ist als die Geschwindigkeit, mit der das zu mahlende Gut durch die Mahlkammer (1,21) hindurchgeleitet wird.A method according to claim 10, characterized in that the speed at which the grinding bodies (13) are moved radially is greater by a factor of three to seven than the speed at which the material to be ground is passed through the grinding chamber (1,21) is passed through.
EP94810295A 1993-06-01 1994-05-24 Continuously working agitator ball mill for fine and ultrafine milling of material Expired - Lifetime EP0627262B1 (en)

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US8814071B2 (en) 2009-02-24 2014-08-26 Willy A. Bachofen Ag Agitator ball mill
CH700446A1 (en) * 2009-02-24 2010-08-31 Bachofen Willy A Ag Stirred ball.
US8118247B2 (en) 2009-07-06 2012-02-21 Willy A. Bachofen Ag Agitator ball mill
EP2272591A1 (en) 2009-07-06 2011-01-12 Willy A. Bachofen AG Stirring ball mill
EP2327479A1 (en) 2009-11-25 2011-06-01 Willy A. Bachofen AG Stirring ball mill
EP2327480A1 (en) 2009-11-25 2011-06-01 Willy A. Bachofen AG Stirring ball mill
US8794558B2 (en) 2010-12-04 2014-08-05 Netzsch-Feinmahltechnik Gmbh Dynamic element for the separating device of a stirring ball mill
US8876028B2 (en) 2010-12-04 2014-11-04 Netzsch-Feinmahltechnik Gmbh Method for operating an agitator ball mill
CN103433100A (en) * 2013-04-27 2013-12-11 占天义 Grinding dispersion wheel
CN103433100B (en) * 2013-04-27 2016-11-09 占天义 A kind of grinding distribution wheel
EP2905080A1 (en) 2014-02-07 2015-08-12 Willy A. Bachofen AG Agitator ball mill
US10464069B2 (en) 2014-02-07 2019-11-05 Willy A. Bachofen Ag Agitator ball mill
WO2015188759A1 (en) * 2014-06-11 2015-12-17 深圳市博亿化工机械有限公司 Novel dispersion grinding device
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JP3159870B2 (en) 2001-04-23
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EP0627262B1 (en) 1999-03-24
US5597126A (en) 1997-01-28

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