EP0640397B1 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0640397B1
EP0640397B1 EP94113127A EP94113127A EP0640397B1 EP 0640397 B1 EP0640397 B1 EP 0640397B1 EP 94113127 A EP94113127 A EP 94113127A EP 94113127 A EP94113127 A EP 94113127A EP 0640397 B1 EP0640397 B1 EP 0640397B1
Authority
EP
European Patent Office
Prior art keywords
mill
separating arrangement
agitator mill
static
agitator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94113127A
Other languages
German (de)
English (en)
Other versions
EP0640397A2 (fr
EP0640397A3 (fr
Inventor
Robert Bartsch
Hans Brogli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FrymaKoruma AG
Original Assignee
Fryma Maschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fryma Maschinen AG filed Critical Fryma Maschinen AG
Publication of EP0640397A2 publication Critical patent/EP0640397A2/fr
Publication of EP0640397A3 publication Critical patent/EP0640397A3/fr
Application granted granted Critical
Publication of EP0640397B1 publication Critical patent/EP0640397B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B02C17/161—Arrangements for separating milling media and ground material
    • 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
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type

Definitions

  • the invention relates to an agitator mill for wet grinding of regrind, according to the generic term of claim 1.
  • DD-A 45 700 or GB-A-1 080 149 is still a dispersing device known, with a with the agitator shaft conical ring sieve is connected, which follows down to the suction area of one on the agitator shaft attached agitator disc tapers. Between the lower end of the sieve and the agitator shaft here a free annular gap is provided, the two to is three times the width of the largest Grinding media. Through this annular gap can be in operation not only flow the flowing back suspension, but given the width of the annulus, too Grinding media, when the dispersing device is switched on or off come into the area of the annulus through step through the annular gap.
  • an agitator mill is known from US-A-4,067,505 approximately according to the preamble of the claim 1 known.
  • a static separator formed by a Sieve with a sieve cylinder
  • a dynamic one Separating device formed by two rings, cf. Fig.3
  • the dynamic separation device there contains two rings delimiting a separation gap, namely a non-rotatable with a cylindrical sleeve connected inner ring and a cooperating with it static outer ring, which - according to Fig. 3 - one end wall of the housing clamped by screws is.
  • the one formed between these two rings The gap distance can be between 0.2 and 1 mm.
  • the millbase suspension through the grinding chamber and through the separation system is always a relatively large one Volume of grinding aids in the area of the separation system and immediately in front of the separators, so that the desired replacement of grinding aids cannot take place and the latter the passage of already shredded material through the Can hinder separation devices.
  • the invention is therefore based on the object Agitator mill the prerequisite in the preamble of claim 1 Type in such a way that even when hired a very narrow friction gap of the dynamic Separating device on the one hand a reliable, trouble-free Separation of grinding aids and their Fragments from the millbase suspension occur and on the other hand Maintenance work, especially on the static Separator, can be greatly reduced.
  • the agitator mill is the essentially stationary ring dynamic separation device for the compensation of eccentric Manufacturing tolerances in a recess in the housing or floating in a recess fixed to the housing stored. This creates the opportunity the one that forms the dynamic separation device Adjust the friction gap very closely (depending on the application between 0.05 mm and 3 mm).
  • the design of the agitator mill is the combination a static and dynamic separation device in particular advantageous. Like those on which the invention is based extensive tests showed, can be such a combination is reliable and almost maintenance-free separation of suspension and grinding aids achieve because the static and the dynamic Separating device in the different operating conditions complement in an ideal way.
  • the dynamic separation device free passage opening of the static separation device in addition, the entire opening of the static and dynamic separating device is therefore relatively is large, the pressure build-up remains in operation the agitator mill small. This will largely avoided that fragments of grinding aids entered the static or dynamic separation device pressed become.
  • the combined separator also offers the possibility of pseudoplastic or strongly thixotropic To process products without increased pressure, because the dynamic separation device by the resulting Shear gradient thixotropies or structural viscosities breaks down.
  • the agitator mill shown in Figure 1 contains a Housing 1 and a rotor 2.
  • the hub body 21 of the rotor 2 sits on a shaft 3 by means of a bearing 4 stored in a storage pot 5 of the housing 1 and from a (not illustrated) drive motor from is driven above.
  • a rotor 22 fixedly connected to the hub body 21 protrudes as a displacement body in a recess 13 of the Housing 1.
  • the peripheral wall 11 of this recess 13 delimits together with the peripheral wall 14 of the rotor 22 a gap-shaped grinding chamber 6.
  • the housing 1 forms in its lower, funnel-shaped trained area a feed space 8 for the in Grist fed in the direction of arrow 7.
  • the feed room 8 stands over an annular channel 9 and a good inlet 15 in connection with the grinding chamber 6.
  • On the outlet side the grinding chamber 6 is on the one hand by a Slit screen 20 formed static separation device and on the other hand, a dynamic formed as a friction gap 25 Separator provided. The details of this two separation devices are based on the Fig.2 explained in more detail.
  • the ground material After passing the slotted screen 20 or the friction gap 25 the ground material is crushed through an outlet channel 23 removed (arrow 16).
  • the grinding aid bodies arrive in contrast from the outlet side 26 of the grinding chamber via return channels 34 to the inlet side of the grinding chamber 6, i.e. to the area of the good inlet 15.
  • Fig.2 shows the details of static and dynamic Separating device of the agitator mill according to Fig. 1.
  • the static separator is through the slotted screen 20 formed, the cylindrical and coaxial is arranged to the axis 10 of the shaft 3.
  • the Slotted screen 20 is made of triangular profile wire and has separation gaps 20a. This from relative limited to each other not movable elements Passage openings (separation column 20a) of the static
  • the width of the separating device (slotted screen 20) is so dimensioned so that the crushed ground material passes through, however, the auxiliary grinding bodies 27 are retained.
  • the friction gap forming the dynamic separation device 25 is replaced by one arranged essentially stationary, in a correspondingly large recess 35 of the Housing 1 floating Ring 32 and one carried by the hub part 29 and rotating accordingly Ring 33 limited. Let it this way eccentric manufacturing tolerances compensate for one another, which results in the setting of a very narrow friction gap 25 allows.
  • the two rings 32, 33 are made of wear-resistant Material made. The ones from Annular gap 25 formed in its opening Size so that the shredded ground material passes through, the grinding aid body 27, however, retained become.
  • the friction gap 25 connects the outlet side 26 of the grinding chamber 6 directly with the outlet duct 23.
  • Figure 3 differs from the variant shown in Figure 2 through the use a conical slotted screen 20.
  • centrifugal blades 36 can be helical and be arranged so that dragged grinding aid 27 from the dynamic separation device, i.e. are promoted away from the friction gap 25. To this In particular, the wear of the Reduce the friction gap limiting rings 32 and 33.
  • 5 shows a variant in which the slotted screen 20 stationary between the housing 1 and one likewise Component 37 fixed to the housing is arranged.
  • the component 37 also carries the stationary ring 32 dynamic separating device, the rotating ring 33 from the hub part connected in a rotationally fixed manner to the shaft 3 29 is worn.
  • the one on the downstream side of the Slotted screen 20 and the friction gap 25 lying space 38 communicates with the outlet duct 23.
  • the gap widths the dynamic friction gap 25 and the slotted screen 20 are in the invention Agitator mill between 0.05 mm depending on the application and 3 mm selected.
  • the friction gap expediently has a width that is 1/4 is up to 1/3 of the diameter of the grinding aid.
  • the passage opening of the static separator and the passage opening of the dynamic separation device can vary in width be measured.
  • the elements delimiting the separation column 20a of the slotted screen 20 for example triangular shape (cf. Fig. 2, 4 and 5) or rectangular shape (see Fig. 3) have.

Landscapes

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

Claims (10)

  1. Broyeur agitateur de fractionnement à voie humide de produits à broyer à l'aide de corps auxiliaires de broyage (27), comprenant
    a) une chambre de broyage (6) sur le côté d'entrée (15) de laquelle du produit frais à broyer est dirigé et sur le côté sortie duquel (26) le produit fractionné à broyer est soutiré,
    b) un dispositif statique de séparation (20) qui est disposé sur le côté sortie (26) de la chambre de broyage (6) et qui comporte au moins un trou de passage (20a) délimité par des éléments qui ne sont pas mobiles les uns par rapport aux autres,
    c) un dispositif dynamique de séparation qui est par ailleurs prévu sur le côte sortie (26) de la chambre de broyage (6), qui comporte au moins un trou de passage (25) et qui est formé d'un anneau (32) disposé en position sensiblement fixe et d'un anneau rotatif (33),
    d) chacun des trous de passage (20a, 25) des deux dispositifs de séparation a une largeur dimensionnée de manière que le produit fractionné à broyer passe, mais que les corps auxiliaires de broyage (27) soient retenus,
    caractérisé en ce que l'anneau (32) disposé en position sensiblement fixe est monté flottant dans un évidement (35) de l'enveloppe (1) pour la compensation des tolérances d'excentricité de fabrication.
  2. Broyeur agitateur selon la revendication 1, caractérisé en ce que l'anneau (32) disposé en position sensiblement fixe et l'anneau rotatif (33) sont en matériau résistant à l'usure et délimitent un intervalle de friction (25) formant le trou de passage.
  3. Broyeur agitateur selon la revendication 1, caractérisé par les particularités suivantes :
    a) un rotor (22) solidaire d'un corps de moyeu (21) pénètre dans un évidement (13) de l'enveloppe (1) de manière à former un corps de refoulement :
    b) la paroi circonférentielle (11) de cet évidement (13) délimite avec la paroi circonférentielle (14) du rotor (22) la chambre de broyage (6) conformée de manière à avoir une forme d'intervalle.
  4. Broyeur agitateur selon la revendication 1, caractérisé en ce que le dispositif statique de séparation est formé d'un tamis à fentes (20) qui est de préférence cylindrique ou conique.
  5. Broyeur agitateur selon la revendication 1, caractérisé en ce que le dispositif statique de séparation (20) est disposé de manière à occuper une position fixe.
  6. Broyeur agitateur selon la revendication 1, caractérisé en ce que le dispositif statique de séparation (20) est formé d'un élément (28, 29) qui est rotatif lorsque le broyeur est en service.
  7. Broyeur agitateur selon la revendication 6, caractérisé en ce que des éléments (36) destinés à provoquer un tourbillonnement de la suspension formée du produit à broyer et des corps auxiliaires de broyage (27) sont solidarisés en rotation avec le dispositif statique de séparation (20) sur le côté de celui-ci qui est tourné vers la chambre de broyage (6).
  8. Broyeur agitateur selon la revendication 7, caractérisé en ce que les éléments destinés à provoquer un tourbillonnement de la suspension sont conformés en ailettes de centrifugation hélicoïdales (36) et sont disposés de manière que des corps auxiliaires de broyage (27) qui ont été entraínés soient refoulés par les ailettes de centrifugation pour être éloignés du dispositif dynamique de séparation.
  9. Broyeur agitateur selon la revendication 1, caractérisé en ce que l'ouverture de passage (20a) du dispositif statique de séparation (20) et l'ouverture de passage (25) du dispositif dynamique de séparation ont des largeurs dimensionnées différemment.
  10. Broyeur agitateur selon la revendication 1, caractérisé en ce que le trou de passage (25) que comporte le dispositif dynamique de séparation a une largeur qui correspond à 1/4 à 1/3 du diamètre des corps auxiliaires de broyage (27).
EP94113127A 1993-08-31 1994-08-23 Broyeur agitateur Expired - Lifetime EP0640397B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4329339A DE4329339A1 (de) 1993-08-31 1993-08-31 Rührwerksmühle
DE4329339 1993-08-31

Publications (3)

Publication Number Publication Date
EP0640397A2 EP0640397A2 (fr) 1995-03-01
EP0640397A3 EP0640397A3 (fr) 1995-07-05
EP0640397B1 true EP0640397B1 (fr) 1999-04-28

Family

ID=6496466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113127A Expired - Lifetime EP0640397B1 (fr) 1993-08-31 1994-08-23 Broyeur agitateur

Country Status (6)

Country Link
US (1) US5518191A (fr)
EP (1) EP0640397B1 (fr)
JP (1) JPH0780339A (fr)
AT (1) ATE179344T1 (fr)
DE (2) DE4329339A1 (fr)
DK (1) DK0640397T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960016970A (ko) * 1994-11-14 1996-06-17 야시마 사부로 분말체 처리장치 및 그 장치에 이용되는 슬릿부재의 제조방법
DE19638354A1 (de) * 1996-09-19 1998-03-26 Draiswerke Inc Mahwah Rührwerksmühle
DE19835555B4 (de) * 1998-08-06 2007-10-04 Bühler AG Verfahren und Vorrichtung zum Nassmahlen und Dispergieren von Feststoffpartikeln in Flüssigkeiten
US20080191072A1 (en) * 2005-04-25 2008-08-14 Gisbert Schall Multi-Stage Agitator Mill
JP2009039598A (ja) * 2007-08-06 2009-02-26 Asada Tekko Kk 湿式媒体攪拌ミル
DE102010053484A1 (de) * 2010-12-04 2012-06-06 Netzsch-Feinmahltechnik Gmbh Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle
DE102013111762A1 (de) * 2013-07-08 2015-01-08 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle mit Axialkanälen
MX2017013319A (es) * 2015-04-17 2018-08-15 Buehler Ag Dispositivo y metodo para mezclado, en particular dispersion.
JP6808212B2 (ja) * 2016-06-14 2021-01-06 アシザワ・ファインテック株式会社 メディア循環型粉砕機
CN113828395B (zh) * 2021-09-03 2023-01-31 南京利卡维智能科技有限公司 一种多轴研磨机

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45700C (de) * F. MYERS in Liverpool, England, 56 Huskisson-Street Maschine zum Formen von Nagelköpfen
GB1080149A (en) * 1965-12-08 1967-08-23 Inst Chemieanlagen Dispersion device
DE1901019A1 (de) * 1969-01-10 1970-09-17 Draiswerke Gmbh Ruehrwerksmuehle
DE2234076C3 (de) * 1971-07-26 1985-11-14 Meyer AG Zuchwil, Zuchwil Rührwerksmühle
SE7402593L (fr) * 1974-02-27 1975-08-28 Ab Boliden
DE2631623C2 (de) * 1976-07-14 1985-06-13 Draiswerke Gmbh, 6800 Mannheim Rührwerksmühle
ES453093A2 (es) * 1976-11-06 1977-12-01 Oliver & Battle Sa Mejoras en molinos de eje horizontal refrigerados, para pro-ductos predispersados de solidos en liquidos.
DE3242436A1 (de) * 1982-11-16 1984-05-17 Fryma-Maschinen AG, 4310 Rheinfelden Muehle fuer fliessfaehiges mahlgut
US4709863A (en) * 1985-10-04 1987-12-01 Morehouse Industries, Inc. Media mill screen assembly
DE3815156A1 (de) * 1987-10-26 1989-11-16 Buehler Ag Geb Ruehrwerksmuehle
SU1500365A1 (ru) * 1987-11-30 1989-08-15 Северодонецкий Филиал Украинского Научно-Исследовательского И Конструкторского Института Химического Машиностроения Бисерна мельница
SU1546140A1 (ru) * 1988-04-07 1990-02-28 Украинский научно-исследовательский углехимический институт Мельница
DE4010926A1 (de) * 1990-04-04 1991-10-10 Fryma Masch Ag Ruehrwerksmuehle
DE9004117U1 (de) * 1990-04-09 1991-08-08 Fryma-Maschinen Ag, Rheinfelden Mühle für fließfähiges Mahlgut mit einem spaltförmigen Mahlraum
ES2030618A6 (es) * 1990-10-31 1992-11-01 Oliver & Battle Sa Molino para triturar y desaglomerar solidos predispersados en liquidos.
US5333804A (en) * 1993-08-20 1994-08-02 Premier Mill Corp. Agitator mill

Also Published As

Publication number Publication date
JPH0780339A (ja) 1995-03-28
DK0640397T3 (da) 1999-10-25
DE59408161D1 (de) 1999-06-02
DE4329339A1 (de) 1995-03-02
EP0640397A2 (fr) 1995-03-01
US5518191A (en) 1996-05-21
EP0640397A3 (fr) 1995-07-05
ATE179344T1 (de) 1999-05-15

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