EP0200003B1 - Mixer with a pin mill - Google Patents

Mixer with a pin mill Download PDF

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Publication number
EP0200003B1
EP0200003B1 EP86104366A EP86104366A EP0200003B1 EP 0200003 B1 EP0200003 B1 EP 0200003B1 EP 86104366 A EP86104366 A EP 86104366A EP 86104366 A EP86104366 A EP 86104366A EP 0200003 B1 EP0200003 B1 EP 0200003B1
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Prior art keywords
rotor
mixer
stator
vanes
pins
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EP86104366A
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German (de)
French (fr)
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EP0200003A2 (en
EP0200003A3 (en
Inventor
Eberhard Lipp
Hans Wetzel
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Draiswerke GmbH
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Draiswerke GmbH
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    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • 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
    • B01F33/833—Devices with several tools rotating about different axis in the same receptacle
    • 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
    • B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking

Definitions

  • Pin mills of this type have an annular stator which is provided with cylindrical pins arranged parallel to one another.
  • a rotor in the form of a disk is arranged inside the stator, on the outer circumference of which a number of cylindrical pins arranged parallel to the stator pins are attached, which pass the stator pins leaving a small gap free.
  • the rotor disc is driven at high speed by a motor located outside the mixer tank.
  • the rotor and stator are spaced from the inside of the wall of the container.
  • the mixing tools of the mixer can be designed and arranged such that they slide at least partially through the space between the rotor and stator on the one hand and the container wall on the other hand, so that the largest possible part of the container is axially swept by the mixing tools. This measure therefore serves to prevent dead zones.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung betrifft einen Mischer mit einer Stiftmühle nach dem Oberbegriff des Anspruches 1.The invention relates to a mixer with a pin mill according to the preamble of claim 1.

Derartige Stiftmühlen weisen einen ringförmigen Stator auf, der mit parallel zueinander angeordneten zylindrischen Stiften versehen ist. Innerhalb des Stators ist ein Rotor in Form einer Scheibe angeordnet, an deren Außenumfang einige parallel zu den Stator-Stiften angeordnete, zylindrische Stifte angebracht sind, die unter Freilassung eines kleinen Spaltes an den Stator-Stiften vorbeilaufen. Die Rotor-Scheibe wird von einem außerhalb des Behälters des Mischers befindlichen Motor hochtourig angetrieben. Rotor und Stator sind im Abstand von der Innenseite der Wand des Behälters angeordnet. Die Mischwerkzeuge des Mischers können so ausgebildet und angeordnet sein, daß sie zumindest teilweise durch den zwischen Rotor und Stator einerseits und Behälterwand andererseits befindlichen Raum hindurch gleiten, damit der möglichst größte Teil des Behälters von den Mischwerkzeugen axial überstrichen wird. Diese Maßnahme dient also der Verhinderung von Totzonen.Pin mills of this type have an annular stator which is provided with cylindrical pins arranged parallel to one another. A rotor in the form of a disk is arranged inside the stator, on the outer circumference of which a number of cylindrical pins arranged parallel to the stator pins are attached, which pass the stator pins leaving a small gap free. The rotor disc is driven at high speed by a motor located outside the mixer tank. The rotor and stator are spaced from the inside of the wall of the container. The mixing tools of the mixer can be designed and arranged such that they slide at least partially through the space between the rotor and stator on the one hand and the container wall on the other hand, so that the largest possible part of the container is axially swept by the mixing tools. This measure therefore serves to prevent dead zones.

Die Stiftmühlen dienen insbesondere zur definierten Verteilung von viskosen, also fließfähigen Materialien, da in dem Spalt zwischen den Rotor-stiften und den Statorstiften ein Schergefälle erzeugt wird.The pin mills are used in particular for the defined distribution of viscous, ie flowable materials, since a shear gradient is generated in the gap between the rotor pins and the stator pins.

Der Mahleffekt in diesen Stiftmühlen ist nicht zufreidenstellend. Zur Verbesserung des Mahlergebnisses ist bereits versucht worden, in der Rotor-Scheibe Löcher vorzusehen. Diese führte lediglich zu einer Erhöhung der Antriebsleistung für die Stiftmühle, ohne daß es zu einer Verbesserung des Mahlergebnisses gekommen ist.The grinding effect in these pin mills is not satisfactory. To improve the grinding result, attempts have already been made to provide holes in the rotor disk. This only led to an increase in the drive power for the pin mill, without an improvement in the grinding result.

Der Erfindung liegt die Aufgabe zugrunde, einen Mischen mit einer Stiftmühle der gattungsgemäßen Art so weiterzubilden, daß eine Verbesserung des Mahlergebnisses erreicht wird, ohne daß es zu einer nennenswerten Erhöhung der Antriebsleistung kommt.The invention has for its object to develop a mixing with a pin mill of the generic type so that an improvement in the grinding result is achieved without a significant increase in drive power.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Überraschenderweise hat sich gezeigt, daß durch Fortlassen der Rotor-Scheibe samt Rotor-Stiften und deren Ersatz durch Flügel, also einen Propeller, eine erhebliche Verbesserung der Mahlleistung der Stiftmühlen im Gesamtprozeß im Mischer erreicht wird. Erklärtwerden kann dies damit, daß die Flügel eine sehr viel stärkere radial und tangential gerichtete Förderwirkung auf die einzelnen Partikel ausüben, d.h. es werden erhebliche größere Mengen Mischgut- bzw. Mahlgut-Partikel pro Zeiteinheit durch den Mahlspalt zwischen die. äußeren Enden der Flügel und den Stator-Stiften gefördert und hier einem hohen Schergefälle ausgesetzt. Insgesamt gelangen während eines Mischprozesses bei einem chargenweise betriebenen Mischer die einzelnen Partikel also sehr viel öfter in den Mahlspalt. Wenn auch bei der erfindungsgemäßen Ausgestaltung--wie an sich üblich-die Mischwerkzeuge den Raum zwischen Rotor und Stator einerseits und Innenwand des Behälters andererseits weitgehend überstreichen, erfolgt hier auch eine Förderung von Misch- bzw. Mahlgut zur Stiftmühle. Insoweit führt dieses an sich bekannte Überstreichen dieses erwähnten Raumes zu einem völlig anderen Effekt, insbesondere also zu einer verbesserten Mahlleistung der Stiftmühle. Durch die Paarung von Schneidkanten an den enden der Flügel einerseits und den Stifen des Stators andererseits werden die Scherwirkungen im Mahlspalt erheblich verbessert.This object is achieved by the features in the characterizing part of claim 1. Surprisingly, it has been shown that by omitting the rotor disk together with rotor pins and replacing them with blades, that is to say a propeller, a significant improvement in the grinding performance of the pin mills in the overall process in the mixer is achieved. This can be explained by the fact that the wings exert a much stronger radial and tangential conveying effect on the individual particles, i.e. there are considerable larger amounts of mixed or regrind particles per unit of time through the grinding gap between the. promoted outer ends of the wings and the stator pins and exposed here to a high shear gradient. All in all, during a mixing process in a batch operated mixer, the individual particles get into the grinding gap much more often. If, in the embodiment according to the invention, as usual, the mixing tools largely sweep the space between the rotor and stator on the one hand and the inner wall of the container on the other hand, mixing or regrind is also conveyed to the pin mill here. To this extent, this known painting over of this space leads to a completely different effect, in particular to an improved grinding performance of the pin mill. By pairing cutting edges at the ends of the wings on the one hand and the stator pins on the other hand, the shear effects in the grinding gap are considerably improved.

Wie sich insbesondere aus den Unteransprüchen ergibt, läYt die erfindungsgemäße Ausgestaltung zu, daß besonders optimierte Fördereffekte erreicht werden.As can be seen in particular from the subclaims, the configuration according to the invention allows particularly optimized conveying effects to be achieved.

Weitere Vorteilung und Merkmale der Erfindung ergeben sich aus der Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Es zeigt

  • Fig. 1 einen vertikalen Längsschnitt durch einen Mischer,
  • Fig. 2 einen Querschnitt durch den Mischer entsprechend der Schnittlinie 11-11 in Fig. 1 in verkleinertem Maßstab,
  • Fig. 3 einen Teilschnitt durch Fig. 1 entsprechend der Schnittlinie 111-111 und
  • Fig. 4 eine Draufsicht auf die Stiftmühle.
Further advantages and features of the invention result from the description of an embodiment with reference to the drawing. It shows
  • 1 is a vertical longitudinal section through a mixer,
  • 2 shows a cross section through the mixer according to section line 11-11 in FIG. 1 on a reduced scale,
  • Fig. 3 is a partial section through Fig. 1 along the section line 111-111 and
  • Fig. 4 is a plan view of the pin mill.

Der in der Zeichnung dargestellte, weitgehend konventionelle Mischer, weist einen horizontalen, stationären, zylindrischen Behälter 1 auf, der von gleichzeitig als Ständer wirkenden Seitenwänden 2, 3 stirnseitig abgeschlossen und gleichzeitig gehalten wird. An den Seitenwänden 2, 3 sind Lagerböcke 4 befestigt, in denen eine konzentrisch zum Behälter 1 angeordnete Welle 5 eine Mischwerks 6 gelagert ist. Sie wird von einem Antriebsmotor 7 über einen Keilriementrieb 8 und ein Getriebe 9 angetrieben. Das Mischwerk 6 weist schaufelartig ausgebildete Mischwerkzeuge 10 auf, die mittels an der Welle 5 angebrachter und radial von dieser abstehender Mischwerkzeug-Träger 11 gehalten werden. Die Mischwerkzeuge 10 selber befinden sich in der Nähe der Innenwand 12 des Behälters 1.The largely conventional mixer shown in the drawing has a horizontal, stationary, cylindrical container 1, which is closed at the end and held at the same time by side walls 2, 3 acting as stands. On the side walls 2, 3 bearing blocks 4 are fastened, in which a shaft 5 arranged concentrically to the container 1, a mixing mechanism 6 is mounted. It is driven by a drive motor 7 via a V-belt drive 8 and a gear 9. The mixing mechanism 6 has mixing tools 10 which are designed in the form of blades and are held by means of mixing tool carriers 11 which are attached to the shaft 5 and project radially therefrom. The mixing tools 10 themselves are located near the inner wall 12 of the container 1.

Auf der Oberseite des Behälters 1 ist ein Materialeinlaß 13 angeordnet; an der Unterseite ist ein Materialauslaß 14 vorgesehen. Der Mischer wird chargenweise als sogenannter Turbulent-Mischer betrieben, d.h. es handelt sich um einen Wurfmischer, bei dem die einzelnen Mischgutpartikel hochgeworfen werdenund auf einer parabelförmigen Wurfbahn wieder in ein Mischgutbett gelangen. Um diesen Effekt zu erreichen, werden die Mischwerkzeuge 10 mit überkritischer Umfangsgeschwindigkeit angetrieben, die-ausgedrückt in der dimensionslosen Froude-Kennzahl-etwa Fr=2-6 beträgt.On the top of the container 1, a material inlet 13 is arranged; a material outlet 14 is provided on the underside. The mixer is operated in batches as a so-called turbulent mixer, i.e. it is a throwing mixer in which the individual mix particles are thrown up and return to a mix bed on a parabolic throw path. In order to achieve this effect, the mixing tools 10 are driven at a supercritical peripheral speed which, expressed in the dimensionless Froude index, is approximately Fr = 2-6.

Die Froude-Kennzahl ist definiert

Figure imgb0001
wobei gilt

  • W=Umfangsgeschwindigkeit der radial äußeren Enden der Mischwerkzeuge 10 in m/s
  • R=Radius des Mischwerks 6 in m
  • g=Erdbeschleunigung in m/s2.
The Froude key figure is defined
Figure imgb0001
 where applies
  • W = peripheral speed of the radially outer ends of the mixing tools 10 in m / s
  • R = radius of the mixer 6 in m
  • g = gravitational acceleration in m / s 2 .

In die Wand 12 des Behälters 1 ist eine sogenannte Stift-Mühle 15 eingebaut, die nachfolgend im einzelnen beschrieben wird: Auf der Außenseite der Wand 12 des Behälters 1, und zwar im Bereich unterhalb der Welle 5 (siehe Fig. 2) ist ein Flanschlager 16 angebracht, an dem ein Motor 17 angeflanscht ist. Eine Kupplung 18 verbindet die Antriebswelle des Motors 17 mit einer Antriebswelle 19 der Stiftmühle 15. Diese Antriebswelle 19 durchsetzt die Wand 12. Die Stiftmühle 15 weist weiterhin zwei als Statorträger dienende Stützstäbe 20 auf, die ebenefalls die Wand 12 durchsetzen, und die in einer Radialebene zur Welle 5 angeordnet sind, so daß sie nur ein geringes Hindernis für Mischwerkzeuge 10 darstellen, wie insbesondere aus Fig. 1 hervorgeht. Konzentrisch zur Achse 21 der Antriebswelle 19 ist auf den beiden Stützstäben 20 ein Stator 22 angebracht, der aus einem Ring 23 und Stiften 24 besteht. Die Stifte 24 erstrecken sich parallel zur Achse 21 und sind auf einem Kreisring angeordnet. Die Achse 21 schneidet im übrigen die Achse 25 der Welle 5 unter einem rechten Winkel, wie aus Fig. 2 hervorgeht. Die Breite des Ringes 23 ist nur so groß, daß die Befestigung auf den Stützstäben 20 möglich ist, und wie es im übrigen aus konstruktiven Gründen notwendig ist.In the wall 12 of the container 1, a so-called pin mill 15 is installed, which is described in detail below: On the outside of the wall 12 of the container 1, specifically in the area below the shaft 5 (see FIG . 2) Flange bearing 16 attached to which a motor 17 is flanged. A coupling 18 connects the drive shaft of the motor 17 to a drive shaft 19 of the pin mill 15. This drive shaft 19 passes through the wall 12. The pin mill 15 also has two support rods 20 serving as stator carriers, which also pass through the wall 12, and which in a radial plane are arranged to the shaft 5, so that they represent only a slight obstacle for mixing tools 10, as can be seen in particular from FIG. 1. A stator 22, which consists of a ring 23 and pins 24, is mounted on the two support rods 20 concentrically with the axis 21 of the drive shaft 19. The pins 24 extend parallel to the axis 21 and are arranged on a circular ring. The axis 21 also intersects the axis 25 of the shaft 5 at a right angle, as can be seen in FIG. 2. The width of the ring 23 is only so large that the attachment to the support rods 20 is possible, and as is otherwise necessary for design reasons.

Radial innerhalb der Stifte 24 ist ein drehfest mit der Antriebswelle 19 verbundener Rotor 26 angeordnet, der propellerartige ausgebildet ist. Hierzu weist er eine mit der Antriebswelle 19 drehfest verbundene Nabe 27 auf, an der sich etwa radial nach außen erstreckende Flügel 28 angebracht sind Diese Flügel 28 können verschiedenartige Ausgestaltungen haben. In der einfachsten Ausgestaltung ist ein Flügel 28' als einfaches, langgestrecktes, rechteckiges Profil ausgebildet, der radial zur Achse 21 angeordnet ist und rein tangentiale Kräfte auf die einzelnen Mischgutpartikel ausübt. Ein Flügel 28" kann so ausgebildet sein, daß sein radial äußeres Ende 29 bezogen auf die Drehrichtung 30 der Antriebswelle 19 nachläuft, also auf das Mischgut eine kombinierte radiale und tangetiale Beschleunigung ausübt. Schießlich kann bei einem Flügel 28'" zumindest das äußere Ende 29' noch schräg angestellt sein, so daß es an den Stiften 24 nach Art eines ziehenden Schnittes vorbeigeführt wird.A rotor 26, which is connected in a rotationally fixed manner to the drive shaft 19 and is designed like a propeller, is arranged radially inside the pins 24. For this purpose, it has a hub 27 which is connected in a rotationally fixed manner to the drive shaft 19 and on which vanes 28 which extend approximately radially outward are attached. These vanes 28 can have various configurations. In the simplest embodiment, a wing 28 'is designed as a simple, elongated, rectangular profile, which is arranged radially to the axis 21 and exerts purely tangential forces on the individual particles of the mixed material. A wing 28 "can be designed such that its radially outer end 29 runs in relation to the direction of rotation 30 of the drive shaft 19, that is to say it exerts a combined radial and tangential acceleration on the material to be mixed. Finally, in the case of a wing 28 '" at least the outer end 29 'still be inclined, so that it is guided past the pins 24 in the manner of a pulling cut.

Die Stifte 24 haben im dargestellten Ausführungsbeispiel quadratischen Querschnitt. Die Querschnittsform selber ist nicht bedeutend; einige Bedeutung kommt aber der Kante 31 an jedem Stift 24 zu, die einer entsprechenden Schneidkante 32 am radial äußeren Ende 29 bzw. 29' der Flügel 28 zugeordnet ist. Zwischen der jeweiligen Kante 31 und der entsprechenden Schneidkante 32 erfolgt also-auch wenn zwischen der Schneidkante 32 und der Kante 31 ein Spalt 33 von 1 bis 3 mm Breite vorhanden ist-ein gewisser Schneideffekt.In the exemplary embodiment shown, the pins 24 have a square cross section. The cross-sectional shape itself is not significant; however, the edge 31 on each pin 24 has some significance, which is assigned to a corresponding cutting edge 32 at the radially outer end 29 or 29 'of the wings 28. A certain cutting effect therefore takes place between the respective edge 31 and the corresponding cutting edge 32, even if a gap 33 of 1 to 3 mm width is present between the cutting edge 32 and the edge 31.

Der Rotor 26 der Stiftmühle 15 wird einer Drehzahl von 1500 bis 3000 Upm angetrieben.The rotor 26 of the pin mill 15 is driven at a speed of 1500 to 3000 rpm.

Im üblichen Betrieb ist der Behälter 1 etwa zu 50% bis 70% seines Volumens mit Mischgut gefüllt. Es wird von dem Mischwerk tubulent durchmischt und insgesamt aufgelockert und durch den Mischbehälter geworfen. Die Flügel 28 des Rotors 26 treiben einselne Mischgutpartikel mit hoher Geschwindigkeit durch die Stifte 24 des Stators 22. Das Mischgut gelangt zum einen vom Inneren des Behälters 1 her zu den Flügeln 28; es gelangt aber auch mittels der Mischwerkzeuge 10 aus dem Bereich zwischen der Wand 12 des Behälters 1 und dem Stator 22 zu den Flügeln. Dies geschieht insbesondere deshalb, weil die Mischwerkzeuge 10 den Bereich zwischen Stator--Rotor einerseits und Wand 12 anderseits fast vollständig überstreichen. Nicht überstrichen wird lediglich der durch die beiden Stützstäbe 20 und die Antriebswelle 19 überdeckte Raum. Diese drei Teile befinden sich ja in einer gemeinsamen ebene radial zur Achse 25 der Welle 5. Diese Materialzuführung zum Rotor 26 ist besonders effizient, weil der Raum innerhalb des Ringes 23 des Stators 22 völlig offen ist und sich in diesem nur der Rotor 26 mit seinem Flügeln 28 befindet.In normal operation, the container 1 is about 50% to 70% of its volume filled with mix. It is mixed tubulently by the mixer and loosened overall and thrown through the mixing container. The vanes 28 of the rotor 26 drive individual particles of the mixed material through the pins 24 of the stator 22 at high speed. The mixed material reaches the vanes 28 from the inside of the container 1; but it also reaches the wings by means of the mixing tools 10 from the area between the wall 12 of the container 1 and the stator 22. This happens in particular because the mixing tools 10 almost completely cover the area between the stator rotor on the one hand and the wall 12 on the other. Only the space covered by the two support rods 20 and the drive shaft 19 is not covered. These three parts are located in a common plane radially to the axis 25 of the shaft 5. This material feed to the rotor 26 is particularly efficient because the space inside the ring 23 of the stator 22 is completely open and only the rotor 26 with its Wings 28 is located.

Der Einsatz der Stiftmühle 15 ist besonders dann von Bedeutung, wenn im Mischer ein pulveriges bzw. schüttfähiges Material mit relativ geringen Mengen Flüssigkeit gemischt werden soll, wobei also die Flüssigkeit die einzelnen Mischgutpartikel lediglich benetzen soll. Hierbei bilden sich in großem Umfang Agglomerate, die wieder aufzulösen sind. Die Zufuhr einer solchen Flüssigkeit kann beispielsweise mittels einer Flüssigkeitsdüse 34 direkt in den Bereich der Stift- mühle erfolgen. Derartige Einsatz- und Anwendungsmöglichkeiten sind für Stiftmühlen allgemein bekannt.The use of the pin mill 15 is particularly important when a powdery or pourable material is to be mixed with relatively small amounts of liquid in the mixer, so that the liquid is only intended to wet the individual particles of the mixed material. Agglomerates form here on a large scale and have to be dissolved again. Such a liquid can be supplied, for example, by means of a liquid nozzle 34 directly into the area of the pin mill. Such uses and applications are generally known for pin mills.

Claims (5)

1. A mixer with a cylindrical container, in which a mixing apparatus (6) is disposed and driven to rotate, with a pinned mill (15) having a motor (17) outside the container (1) and a rotor (26) connected to the motor in a rotationally drivable manner, and with a stator at least partially surrounding the rotor at a tangent and having pins (24) disposed approximately concentrically with the axis (21) of the rotor (26), the rotor (26) being disposed inside the pins (24), and the rotor (26) being provided with elements defining a grinding gap (33) with respect to the pins (24), characterized in that the elements of the rotor (26) defining a grinding gap (33) with respect to the pins (24) of the stator (22) are in the form of vanes (28, 28', 28", 28"') which extend approximately radially to the rotor axis (21) and are attached to a hub (27) driven by the motor (17) and of which the radially outer ends (29, 29') have a cutting edge (32) in that the pins (24) of the stator (22) each have at least one edge (31) associated with the radially outer ends (29, 29') of the vanes (28, 28', 28", 28"'), and in that the rotor (26) inside the stator between the hub (27) and the ends (29,29') of the vanes (28, 28', 28", 28"') between the vanes (28, 28', 28", 28"') is provided to be open.
2. A mixer as defined in Claim 1, characterized in that the mixing tools (10) of the mixer are at least partly movable through a space located between the wall (12) of the container (1) on the one hand and the rotor (26) and the stator (22) on the other hand.
3. A mixer as defined in Claim 1 or 2, characterized in that the vanes (28') are approximately flat and are disposed in a plane receiving the axis (21) of the rotor (26) and extend substantially at right angles to the axis (21) of the rotor (26).
4. A mixer as defined by Claim 1 or 2, characterized in that the radially outer ends (29) of the vanes (28") trail with respect to the rotational direction (30) of the rotor (26).
5. A mixer as defined Claim 1 or 2, characterized in that the radially outer ends of the vanes (28"') are inclined with respect to a plane receiving the axis (21) of the rotor (26).
EP86104366A 1985-04-27 1986-03-29 Mixer with a pin mill Expired - Lifetime EP0200003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853515318 DE3515318A1 (en) 1985-04-27 1985-04-27 PIN MILL FOR MIXERS
DE3515318 1985-04-27

Publications (3)

Publication Number Publication Date
EP0200003A2 EP0200003A2 (en) 1986-11-05
EP0200003A3 EP0200003A3 (en) 1989-01-25
EP0200003B1 true EP0200003B1 (en) 1990-06-13

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EP86104366A Expired - Lifetime EP0200003B1 (en) 1985-04-27 1986-03-29 Mixer with a pin mill

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US (1) US4848919A (en)
EP (1) EP0200003B1 (en)
JP (1) JPH06104187B2 (en)
DE (2) DE3515318A1 (en)

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CN110773063A (en) * 2019-11-06 2020-02-11 浙江长兴振明高科耐火材料有限公司 Raw materials preparation facilities is used in refractory material production

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Also Published As

Publication number Publication date
EP0200003A2 (en) 1986-11-05
US4848919A (en) 1989-07-18
DE3515318A1 (en) 1986-10-30
DE3671845D1 (en) 1990-07-19
EP0200003A3 (en) 1989-01-25
JPH06104187B2 (en) 1994-12-21
JPS61249533A (en) 1986-11-06

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