EP0700721B1 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0700721B1
EP0700721B1 EP95112853A EP95112853A EP0700721B1 EP 0700721 B1 EP0700721 B1 EP 0700721B1 EP 95112853 A EP95112853 A EP 95112853A EP 95112853 A EP95112853 A EP 95112853A EP 0700721 B1 EP0700721 B1 EP 0700721B1
Authority
EP
European Patent Office
Prior art keywords
grinding
auxiliary
agitator
stock
mill according
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
EP95112853A
Other languages
German (de)
English (en)
Other versions
EP0700721A1 (fr
Inventor
Norbert Dr. Ing. Stehr
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.)
Draiswerke GmbH
Original Assignee
Draiswerke GmbH
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 Draiswerke GmbH filed Critical Draiswerke GmbH
Publication of EP0700721A1 publication Critical patent/EP0700721A1/fr
Application granted granted Critical
Publication of EP0700721B1 publication Critical patent/EP0700721B1/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

Definitions

  • the invention relates to an agitator mill according to the preamble of the claim 1.
  • EP 0 058 886 A2 (corresponding to US Pat. No. 4,496,106) is an agitator mill of the generic type known, the auxiliary grinding body return line immediately in front of the regrind auxiliary body feed opening opens into the regrind feed line at an angle of 90 °.
  • the Auxiliary grinding body and not yet sufficiently ground material due to the centrifugal effect generated by the agitator Grinding auxiliary body outlet opening are thrown out and through the Grinding body return line can be returned.
  • the grinding aid return line into the regrind feed line should be one Suction are generated, which still supports the centrifugation.
  • a good premix of regrind and auxiliary grinding media should be used arise in the regrind feed line.
  • a ball mill for dry grinding is known from US Pat. No. 2,595,117.
  • the ground material and the grinding media are used in this ball mill discharged together through a discharge line and into a vertical Air line brought, which serves as an air classifier.
  • a vertical Air line is blown air from below that all smaller particles in promotes a separator.
  • the grinding balls and large pieces of ground material fall against the air flow down and are conveyed by means of a screw conveyor demanded back to the mill.
  • a separator again a separation of enough finely ground material and not yet ground enough. The latter is done by a Line also fed to the snail.
  • the invention is based, an agitator mill of the generic type Kind so that a reliable circulation of the Grinding auxiliary body is reached.
  • FIGS. 1 and 2 A so-called horizontal agitator mill is shown in FIGS. 1 and 2.
  • This has a stand 1 in the usual way, which on the Floor 2 is supported.
  • On the front 3 of the stand 1 is a support arm 4 attached.
  • the drive shaft 9 is in the stand 1 by means of several Bearing 10 rotatably mounted.
  • the grinding container 12 has a cylindrical wall 13 and is on one, the stand 1 facing End by means of a cover 14 and at the opposite end closed by a bottom 15. It encloses a grinding room 16.
  • an agitator shaft 18 is arranged in grinding chamber 16, which penetrates the lid 14.
  • the grinding chamber 16 is by means of seals 19 sealed between the cover 14 and the shaft 18.
  • the shaft is 18 overhung, i.e. no longer stored in the area of the floor 15.
  • she is provided over its length in the grinding chamber 16 with stirring tools 20, at which in the present case are stirring disks 21, 21a.
  • the Stirring disks 21, 21a can - as shown in Fig. 2 - with Openings 22 and 22a may be provided.
  • the grinding chamber 16 is at least in substantially filled with auxiliary grinding bodies 23.
  • a regrind auxiliary body feed opening opens 24 in the grinding chamber 16, which is formed in the lid 14.
  • a grinding aid outlet opening 25 which in a common radial plane with the last mounted on the agitator shaft 18 Stirring tool 20, i.e. the last stirring disc 21a is.
  • the last stirring disk 21a has one larger diameter than the other stirring disks 21, so that they only a relatively small annular space 26 to the wall 13 of the grinding container 12 leaves free.
  • the width a of this annular space 26 is radial to the central longitudinal axis 17 is 10 to 50 mm.
  • the width b of the stirring disc 21a in the direction of the axis 17 is also larger than the corresponding one Width of the other stirring disks 21, as can also be seen from FIG. 1.
  • the width b is at least as large as the width c of the grinding aid outlet opening 25 in the direction of the central longitudinal axis 17, so that the Stirring disc 21a with its cylindrical periphery 27, the grinding aid outlet opening 25 completely covered in the direction of the axis 17.
  • the Stirring disk 21a thus has a larger diameter and a larger one Width in the direction of the axis 17 as the stirring discs 21.
  • This before the Grinding auxiliary body outlet opening 25 arranged agitator disc 21a thus in this limited area the function of a cylinder agitator while in the grinding chamber 16 is a disc agitator.
  • grinding aid retention devices 28 arranged in the form of so-called sieve cartridges 29, which in corresponding nozzle 30 held in the wall 13 of the grinding container 12 are and pulled out of this from the grinding chamber 16 to the outside can be.
  • Screen cartridges 29 of this type are, for example, in agitator mills known from DE-PS 20 37 258 (corresponding to US-PS 3,780,957).
  • a grinding aid return pipe socket connects to the grinding aid outlet opening 25 31, which - as can be seen in FIG. 2 - in essentially tangentially in a radial plane to the axis 17 upwards is. It is arranged such that the direction of rotation 32 of the circumference 27 of the agitator disc 21a is directed tangentially into it.
  • This Grinding auxiliary body return pipe socket 31 is as a pipe bend deflected by 90 ° formed in a straight line and parallel to the axis 17th running and next to the top 33 and immediately next to the wall 13 of the grinding container 12 arranged grinding material feed and grinding aid return line 34 passes.
  • This line 34 is via a 180 ° pipe elbow 35 with the regrind auxiliary body feed opening 24 connected.
  • auxiliary grinding device return pipe socket 31 opens - aligned with the line 34 - A regrind feed line 36, whose inner diameter d is smaller than the inside diameter D of the regrind and regrind return line 34 and the pipe socket 31. This is opposite the flow rate in the line 34 and in the pipe socket 31 higher Flow rate in the regrind feed line 36 reached. This higher flow rate causes a good distribution of the Auxiliary grinding body 23 in the regrind and thus a pronounced hydraulic Transport of the auxiliary grinding body 23 and prevents backflow the auxiliary grinding body 23 in the pipe socket 31.
  • the regrind feed line 36 in one piece or in one piece with the line 34 be formed.
  • auxiliary grinding device return pipe socket 31 is - As indicated in Fig. 2 - a shut-off device 37 in the form of a slide, a valve or an adjustable throttle arranged as a starting aid can serve.
  • the regrind feed line 36 is operated in the usual way by means of a pump 38 fed from a storage container 39 regrind, which through the regrind and Grinding aid return line 34 and the 180 ° pipe elbow 35 reaches one end of the grinding container 12.
  • a pump 38 fed from a storage container 39 regrind, which through the regrind and Grinding aid return line 34 and the 180 ° pipe elbow 35 reaches one end of the grinding container 12.
  • the grist together with the auxiliary grinding bodies 23 of the high-speed driven stirring tools 20 an intensive dispersing, grinding and Subject to shearing process, this mixture in the grinding chamber 16 in Flow to the outlet opening 25 and the retainers 28.
  • the regrind is through the retention devices 28 to the outside withdrawn and, if appropriate, via a discharge line 40 to the storage container 39 fed again.
  • the auxiliary grinding bodies 23 are in front of the retaining devices 28 by means of the arranged in front of the outlet opening 25 Stirring disc 21a thrown into the pipe socket 31. They flow through the very short curved pipe socket 31 to the junction 41 of the Feed line 36 into the regrind and regrind return line 34. The millbase stream fed through the millbase feed line 36 takes over the return transport of the auxiliary grinding bodies 23 to the feed opening 24, So back to the grinding room 16.
  • the stand carrying the grinding container 12 'with a drive for the Agitator shaft 18 ' is not shown in Fig. 3.
  • a cage-like portion 43 formed which is a closed, on the Agitator shaft 18 'has attached disc 44.
  • an annular disc 45 is provided, which also is arranged concentrically to the central longitudinal axis 17. This washer 45 is located directly next to the floor 15 '.
  • the disc 44 and the Ring disc 45 are in the area of a cylindrical wall 46 External perimeter connected.
  • regrind inflow channels 47 are formed which are related to the direction of rotation 32 of the agitator shaft 18 'leading from the outside inwards are formed, as can be seen in FIG. 4.
  • the interior 48 of the cage-like section 43 protrudes as a grinding aid retaining device 28 into a cylinder screen 49, which the bottom 15 'and the washer 45th enforced.
  • the inner edge 50 of the washer 45 is approximately free of play opposite the cylinder sieve 49, so that here no grinding aid 23 in can enter the interior 48.
  • the cage-like section 43 has a width b 'in the direction of the axis 17, which is greater than the width c 'of the outlet opening 25' in the direction of Axis 17. This width c 'corresponds approximately to the extent e of the interior 48 in the direction of the axis 17.
  • the annular space 26 'between the im has substantially cylindrical circumference 27 'of the cage-like section 43 a width a 'for which the details of the embodiment according to FIG. 1 and 2 apply.
  • the cage-like portion 43 may also be one in the direction the axis 17 viewed particularly thick, hollow stirring disc become.
  • the function of the agitator mill according to FIGS. 3 to 5 differs from the embodiment according to FIGS. 1 and 2 only in that the regrind at the end of the grinding chamber 16 in full with the auxiliary grinding body 23 enters the annular space 26 ', from where it according to the flow direction arrows 51 through the regrind inflow channels 47 into the Interior 48 of the cage-like portion 43 is directed.
  • the grinding aid 23 are through the outlet opening 25 'in the very short Pipe socket 31 'pressed and at the junction 41 of the regrind feed line 36 taken from the regrind and then through the line 34 hydraulically again to the regrind auxiliary body feed opening 24 transported.
  • the ground material exits through the retention device 28 and is optionally by a discharge line 40 only indicated transported back to the reservoir 39.
  • FIGS. 6 and 7 is a further embodiment of a horizontal agitator mill shown in many areas constructively with the lying Agitator mill according to FIGS. 3 and 5 corresponds. Identical Parts are therefore with identical reference numbers and functionally the same, constructively but slightly different parts with the same reference numbers designated, which, however, provided with a double prime are. There is no need for a renewed description.
  • the grinding aid outlet opening 25 ′′ is located in the upper area the bottom 15 '' of the grinding container 12 '.
  • the annular space 26 '' between the cage-like section 43 ′′ and the cylindrical wall 13 ′′ of the grinding container 12 '' larger than in the agitator mill according to the Figures 3 to 5, i.e. the width a ′′ of the annular space 26 ′′ radially to the axis 17 is 25 to 100 mm.
  • a grinding auxiliary body return pipe socket 31 ′′ designed as a 180 ° pipe elbow, which at the junction 41 into the Line 34 passes over. 6, this pipe socket 31 '' shown offset from line 34 to him in this figure to be able to represent.
  • the ground material flows together with the in this agitator mill Grinding auxiliary bodies 23 the grinding chamber 16 and occurs in the relatively wide Annulus 26 ''.
  • the regrind enters through the channels 47 in the Interior 48 of the cage-like portion 43 '' and flows through the Cylinder sieve 49.
  • the grinding aid 23 are through the outlet opening 25 '' discharged from the grinding chamber 16 and over the pipe socket 31 '' returned to the hydraulic return transport.
  • the regrind can - how in the previously described embodiments - via the reservoir 39 are guided in a circle.
  • Fig. 8 a so-called standing agitator mill is shown, which in constructive areas with the horizontal agitator mill according to the 1 and 2 agree. Identical parts are therefore identical Reference numbers and functionally the same, constructively but slightly different Parts with the same reference numerals, but with a superimposed triple line are provided. A new description so far it is not necessary.
  • the standing agitator mill according to FIG. 8 differs from that of Fig. 1 in that the regrind auxiliary body supply opening 24 in bottom floor 15 '' 'of the substantially vertically arranged Grinding container 12 '' 'is located.
  • the grinding aid outlet opening 25 is arranged adjacent to the top cover 14 '' '. this is also valid for the grinding aid retainer 28.
  • the regrind feed line In this case, 36 becomes an area above the grinding container 12 '' 'directed downwards to the grist feed and grinding aid return line 34 introduced.
  • the function is the same as for the Embodiment according to FIGS. 1 and 2, but regrind and Auxiliary grinding body through the grinding chamber 16 upwards from the floor 15 '' 'in Flow towards the lid 14 '' '.

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

Claims (11)

  1. Broyeur agitateur comportant
    un réservoir de broyage (12, 12', 12'', 12''') délimitant un espace de broyage (16),
    un agitateur fonctionnant à haute vitesse, disposé dans le réservoir de broyage (12, 12', 12'', 12'''),
    des éléments de broyage auxiliaires (23) remplissant au moins partiellement l'espace de broyage (16),
    une ouverture d'alimentation (24) en matière à broyer et en éléments de broyage située à une extrémité du réservoir de broyage (12, 12', 12'', 12''') et débouchant dans l'espace de broyage (16),
    un dispositif de retenue (28) des éléments de broyage situé à l'autre extrémité du réservoir de broyage (12, 12', 12'', 12''') pour la sortie de la matière broyée,
    une ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires disposée en amont et à proximité du dispositif de retenue (28) à ladite autre extrémité du réservoir de broyage (12, 12', 12'', 12'''),
    une conduite (24) de remise en circulation des éléments de broyage auxiliaires conduisant de l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires à l'ouverture d'alimentation (24) en matière à broyer et en éléments de broyage auxiliaires,
    une conduite d'alimentation (36) en matière à broyer dans laquelle la circulation se fait dans le sens de circulation (42) de la matière à broyer et
    une embouchure (41) située en amont de l'ouverture d'alimentation (24) en matière à broyer et en éléments de broyage auxiliaires, par rapport audit sens de circulation (42), et au niveau de laquelle la conduite d'alimentation en matière à broyer (36) et la conduite de remise en circulation des éléments de broyage auxilaires sont reliées pour former une conduite (34) d'alimentation en matière à broyer et de remise en circulation des éléments de broyage auxiliaires,
    caractérisé en ce que ladite embouchure (41) est disposée à proximité immédiate de l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires.
  2. Broyeur agitateur selon la revendication 1, caractérisé en ce que la conduite d'alimentation (36) en matière à broyer et la conduite (34) d'alimentation en matière à broyer et de remise en circulation des éléments de broyage auxiliaires ne présentent au niveau de ladite embouchure (41) pas de changement substantiel d'orientation dans le sens de la circulation (42).
  3. Broyeur agitateur selon l'une des revendications 1 ou 2, caractérisé en ce qu'une tubulure (31, 31', 31'') mène de l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires à ladite embouchure (41), ladite tubulure formant un raccord coudé et débouchant sensiblement dans le sens de circulation (42) dans la conduite d'alimentation en matière à broyer et de remise en circulation des éléments de broyage auxiliaires (34).
  4. Broyeur agitateur selon l'une des revendications 1 à 3, caractérisé en ce qu'à l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires est affecté un outil agitateur (20) qui recouvre l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires dans le sens de l'axe longitudinal médian (17).
  5. Broyeur agitateur selon l'une des revendications 1 à 4, caractérisé en ce qu'entre l'outil agitateur recouvrant l'ouverture d'évacuation (25, 25', 25'') des éléments de broyage auxiliaires et la paroi (13, 13') du réservoir de broyage (12, 12', 12'') est ménagé un espace annulaire (26, 26') de faible largeur (a, a').
  6. Broyeur agitateur selon l'une des revendications 1 à 5, caractérisé en ce que la conduite (34) d'alimentation en matière à broyer et de remise en circulation des éléments de broyage auxiliaires est disposée à proximité du réservoir de broyage (12, 12', 12'').
  7. Broyeur agitateur selon l'une des revendications 1 à 6, caractérisé en ce que l'outil agitateur (20) qui recouvre l'ouverture d'évacuation (25) des éléments de broyage auxiliaires se présente sous la forme d'un disque agitateur (21a).
  8. Broyeur agitateur selon l'une des revendications 1 à 6, caractérisé en ce que l'outil agitateur (20) qui recouvre l'ouverture d'évacuation (25', 25'') des éléments de broyage auxiliaires se présente comme un tronçon en forme de cage (43' 43'').
  9. Broyeur agitateur selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de retenue (28) des éléments de broyage auxiliaires se présente sous la forme d'une cartouche à tamis disposée entre le disque agitateur (21a) et la paroi de fermeture (15) du réservoir de broyage (12, 12').
  10. Broyeur agitateur selon l'une des revendications 1 à 6 et 8, caractérisé en ce que le dispositif de retenue (28) des éléments de broyage auxiliaires se présente sous la forme d'un tamis cylindrique (49) faisant saillie dans le tronçon en forme de cage (43, 43').
  11. Broyeur agitateur selon l'une des revendications 1 à 10, caractérisé en ce que l'agitateur se présente sous la forme d'un agitateur à disques d'agitation.
EP95112853A 1994-09-09 1995-08-16 Broyeur agitateur Expired - Lifetime EP0700721B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4432198A DE4432198A1 (de) 1994-09-09 1994-09-09 Rührwerksmühle
DE4432198 1994-09-09

Publications (2)

Publication Number Publication Date
EP0700721A1 EP0700721A1 (fr) 1996-03-13
EP0700721B1 true EP0700721B1 (fr) 1999-11-24

Family

ID=6527850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112853A Expired - Lifetime EP0700721B1 (fr) 1994-09-09 1995-08-16 Broyeur agitateur

Country Status (7)

Country Link
US (1) US5544825A (fr)
EP (1) EP0700721B1 (fr)
JP (1) JPH0889833A (fr)
CN (1) CN1118282A (fr)
AU (1) AU691639B2 (fr)
BR (1) BR9503979A (fr)
DE (2) DE4432198A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630186B4 (de) * 1996-07-26 2007-11-15 BüHLER GMBH Rührwerksmühle
DE69621352T2 (de) * 1996-11-22 2003-03-06 Toyo Ink Mfg. Co., Ltd. Dispergiervorrichtung
DE19713765A1 (de) * 1997-04-03 1998-10-08 Bayer Ag Rührwerkkugelmühle mit umlaufenden Mahlkörpern
DE19839210B4 (de) * 1998-08-28 2007-09-06 BüHLER GMBH Rührwerksmühle
DE19912594B4 (de) * 1999-03-20 2008-01-31 Zoz Gmbh Vorrichtung zur Hochenergie- und/oder Feinstmahlung von Feststoffen
JP2006212489A (ja) * 2005-02-01 2006-08-17 Ashizawa Finetech Ltd 媒体攪拌型粉砕装置を用いる粉砕方法
JP2006212488A (ja) * 2005-02-01 2006-08-17 Ashizawa Finetech Ltd 媒体攪拌型粉砕装置
JP4953805B2 (ja) * 2006-12-28 2012-06-13 アシザワ・ファインテック株式会社 媒体攪拌型粉砕装置
EP2246113A1 (fr) * 2009-04-29 2010-11-03 Sandvik Intellectual Property AB Processus pour le broyage de cermet ou mélanges de carbure cimenté
DE102010052656A1 (de) * 2010-11-26 2012-05-31 Netzsch-Feinmahltechnik Gmbh Hydraulische Mahlkugel Zu- und Abfuhr für Rührwerkskugelmühlen
CN102284328B (zh) * 2011-07-19 2014-07-02 无锡新光粉体加工工艺有限公司 循环型高速多叶轮超细粉体研磨机
CN104722367B (zh) * 2013-12-20 2017-07-07 无锡新光粉体科技有限公司 一种介质搅拌型湿法研磨分散装置
DK3311921T3 (en) * 2016-10-18 2019-01-14 Bachofen Willy A Ag Stirring Ball Mill
DK3311922T3 (en) * 2016-10-18 2019-03-18 Bachofen Willy A Ag Stirring Ball Mill
WO2018112705A1 (fr) * 2016-12-19 2018-06-28 陈强 Broyeur à boulets à agitation
CN107321205A (zh) * 2017-08-08 2017-11-07 安庆泽远化工有限公司 一种贝壳粉生态干粉涂料磁球搅拌系统

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Publication number Priority date Publication date Assignee Title
US2595117A (en) 1950-03-08 1952-04-29 Smidth & Co As F L Method and apparatus for grinding
US4065060A (en) * 1976-10-06 1977-12-27 Aluminum Company Of America Metal flake production
DE3036280A1 (de) * 1980-09-26 1982-05-13 Kaspar 6800 Mannheim Engels Ruehrwerksmuehle
DE3106062A1 (de) 1981-02-19 1982-09-09 Draiswerke Gmbh, 6800 Mannheim Ruehrwerksmuehle
JPH043630Y2 (fr) * 1987-01-23 1992-02-04
DE3716587C1 (de) * 1987-05-18 1988-04-28 Draiswerke Gmbh Ruehrwerksmuehle
DE3938171C1 (fr) * 1988-12-30 1991-01-03 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De
US5199656A (en) * 1990-10-15 1993-04-06 Union Process, Inc. Continuous wet grinding system
JP3246973B2 (ja) * 1993-01-25 2002-01-15 真澄 楠 攪拌ミルを有する粉砕装置

Also Published As

Publication number Publication date
BR9503979A (pt) 1996-09-24
JPH0889833A (ja) 1996-04-09
AU691639B2 (en) 1998-05-21
EP0700721A1 (fr) 1996-03-13
DE4432198A1 (de) 1996-03-14
US5544825A (en) 1996-08-13
DE59507279D1 (de) 1999-12-30
CN1118282A (zh) 1996-03-13
AU3024395A (en) 1996-03-21

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