EP2178643B1 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP2178643B1
EP2178643B1 EP07801726A EP07801726A EP2178643B1 EP 2178643 B1 EP2178643 B1 EP 2178643B1 EP 07801726 A EP07801726 A EP 07801726A EP 07801726 A EP07801726 A EP 07801726A EP 2178643 B1 EP2178643 B1 EP 2178643B1
Authority
EP
European Patent Office
Prior art keywords
agitator
disc
grinding
last
adjacent
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.)
Not-in-force
Application number
EP07801726A
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German (de)
English (en)
Other versions
EP2178643A1 (fr
Inventor
Norbert 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.)
Buehler AG
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Buehler AG
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Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP2178643A1 publication Critical patent/EP2178643A1/fr
Application granted granted Critical
Publication of EP2178643B1 publication Critical patent/EP2178643B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C17/163—Stirring means

Definitions

  • the invention relates to a stirred mill according to the preamble of claim 1.
  • Such a stirring mill is from the EP 0 751 830 B1 known.
  • the distance between the last cage-carrying stirring disk and the adjacent stirring disk is significantly smaller than the distance of the other stirring disks from each other. The reason is that between the stirring discs with the exception of the last stirring disc, the distance is in each case so large that set so-called Zopfströmungen, that is, adjacent to the stirring discs flows the Mahlguts stresses with the Mahloskörpem due to the force applied by the stirring discs tangential pulses to the outside. In the middle region between the adjacent stirring discs, the grinding stock and grinding aid body flow back towards the stirrer shaft.
  • the distance between adjacent stirring discs must be sufficiently large. This distance is also defined by a so-called separation angle, which is enclosed by two lines.
  • a line extends between a radially inner end of a stirring disc on the stirrer shaft. The other line is parallel to the axis of the stirrer shaft.
  • the angle of separation should be between 30 ° and 60 °. So that a particularly good separation of Mahlos emotions from the material to be ground, including not yet sufficiently comminuted Mahlgutpisme, the distance between the last stirring disk and the adjacent stirring disk is significantly reduced, so that there takes place while avoiding the formation of a Zopf flow pre-classification before the separator.
  • a deflecting plate is mounted, which forms a gap to the adjacent stirring disc.
  • the return channel opens.
  • the millbase flows from the grinding stock feed with the Mahlos phenomenon entrained by the grinding chamber, where it is ground and dispersed in a known manner.
  • Mahlos emotions entrained by the grinding chamber, where it is ground and dispersed in a known manner.
  • the Mahlos phenomenon thrown to the outside and taken back by the entering into the grinding chamber regrind and be returned to the milling process.
  • the invention has for its object to design a stirred mill of the generic type so that without increasing the length of a more intense grinding and dispersing process at the same time better separation of MahlangesMech and coarse not sufficiently ground Mahlgutpappel.
  • the development according to claim 9 causes the material to be ground with the normal concentration of Mahlöskörpem fully funded by the passages in the gap space between the last stirring disc and the intermediate wall.
  • the agitator mill shown in the drawing has a machine stand 1, on which a grinding container 2 is releasably attached.
  • a drive motor 3 is arranged, which drives a stirrer shaft 5 of a stirrer 6 via a belt drive 4.
  • the agitator shaft 5 is rotatably supported in the machine stand 1 in bearings 7.
  • the agitator shaft 5 is not stored, d. H. it is stored in the machine stand 1 flying.
  • the grinding container 2 is closed relative to the machine stand 1 by means of a lid 8, which is penetrated by the stirring shaft 5, wherein a seal by means of a shaft seal 9 is effected.
  • a grinding material feed 11 opens into the grinding space 10 enclosed by the grinding container 2. From the grinding material supply 11 opposite end of the grinding container 2 opens from the grinding chamber 10 final floor 12 a regrind discharge 13 from.
  • the stirring discs 14 On the agitator shaft 5 are - as part of the agitator 6 - mounted as agitating 14 stirring tools, the stirring discs 14 have openings 15 in its outer peripheral region. The distances a adjacent stirring discs 14 in the direction of the axis 16 of the stirring shaft 5 are the same. Only the distance of the cover 8 immediately adjacent stirrer disc 14 from the lid 8 is smaller than the distance a.
  • Fig. 2 can be removed, the bottom 12 adjacent the last stirrer disc 17 of the agitator 6 by means of a fastening screw 18 is attached to the stirrer shaft 5.
  • the axial distance a 'of this stirring disc 17 from the adjacent penultimate stirring disc 14 of the agitator 6 is identical to the aforementioned respective axial distances a adjacent stirring discs 14.
  • the diameter b of all stirring discs 14 and the diameter b' of the stirring disc 17 are identical.
  • a cylindrical cage 19 is formed, which may be formed integrally with the last stirring disc 17. He has distributed over its circumference numerous openings 20.
  • passages 22 formed in the last stirring disk 17 open adjacent to the stirring shaft 5.
  • a sieve device 23 is arranged concentrically to the axis 16 at the bottom 12. It is mounted on the floor 12, in such a way that the sieve means 23 can be pulled out after loosening from the bottom 12 to the outside. So it is non-rotatably connected to the grinding container 2. From the inner space 24 of the sieve device 23, the Mahlgut-discharge 13 opens.
  • the sieve device 23 may by in on its cylindrical circumference in known Way be formed at a small distance from each other arranged annular discs.
  • the inside of the stirring disk 17, the cage 19 and the screen device 23 thus form a separating device 25.
  • the screen device 23 has a closed end plate 26 adjacent to the stirring disk 17. The inner space 24 of the sieve device 23 is thus connected to the separation chamber 21 only via the sieve device 23.
  • a closed intermediate wall 27 is mounted between the stirring disc 17 and the end plate 26, which rotates with the agitator 6 and which defines a gap space 28. While in the embodiment according to Fig. 2 this intermediate wall 27 is fastened with the fastening screw 18 on the agitator shaft 5 is in the embodiment according to Fig. 3 the intermediate wall 27 'attached directly to the stirrer disk 17 by means of wing-like spacers 29 distributed over the circumference.
  • the intermediate walls 27 and 27 'each extend radially at least over the end plate 26; in other words: c ⁇ d, where c is the diameter of the intermediate wall 27 or 27 'and d is the diameter of the end plate 26.
  • c> d where the corresponding intermediate wall 27 'extends close to the cage 19.
  • the openings 15 in the stirring discs 14 can - as Fig. 4 can be removed - have a circular cross-section. Accordingly, the recesses 30 in the stirring disc 17 'according to Fig. 5 circular shaped.
  • the openings 15 'in the stirrer disks 14 may have approximately the cross-section of outwardly widening trapezoids.
  • the grinding chamber 10 is filled to a considerable extent with Mahlöskörpem 31.
  • flowable ground material is pumped continuously through the grinding chamber 10 by means of a pump, not shown.
  • the agitator 6 is driven in rotation by the drive motor 3.
  • the material to be ground flows through the grinding chamber 10 in the direction of the grinding material outlet formed by the grinding material discharge 13. During this flow, it is exposed to strong shear stresses by the Mahlos stresses 31 and thereby comminuted particles are comminuted and also the millbase is homogenized. This process proceeds in such a way that in each case between adjacent stirrer discs 14 and 14 and 17 in the Fig. 1 and 2 adjust shown plait flows 32.
  • the ground regrind is - as far as it is not thrown off by the cage 19 is - deflected in the annular gap 27a between the outer periphery 27b of the intermediate wall 27 and the cage 19 in an axial flow direction and discharged through the strainer 23.
  • the separation of the Mahltos stresses 31 and possibly of large Mahlgutpellen thus takes place only within the separation device 25.
  • a so-called separation angle ⁇ or ⁇ is used.
  • the separation angle ⁇ or ⁇ is formed between two lines 33 and 34, respectively.
  • the line 33 extends from the inner end 35 of a stirring disc 14 on the stirring shaft 5 to the outer edge 36 of an adjacent stirring disc 14.
  • the other line 34 is a line parallel to the axis 16.
  • the separation angle ⁇ is that between the last stirring disk 17 or 17 'and the next adjacent stirring disk 14.
  • the separation angle 30 ° ⁇ ⁇ 60 ° or 30 ° ⁇ ⁇ 60 °.
  • this also means that the separation angle ⁇ between the last stirrer disk 17 or 17 'and the next adjacent stirrer disk 14 is such that the mentioned plait flows 32 set, even if the distances a and a' are not identical should.
  • agitator mills having a horizontal axis 16 have been described in each case in the described embodiments, the invention is, of course, also applicable to agitator mills with a vertical axis.
  • the passages 22 in the stirrers 17, 17 ' as it is only in Fig. 8 is shown, be designed to promote active.
  • Their walls 37 are not parallel to the axis 16 in this case, but are opposite to the direction of rotation 38 and in the flow direction 39 - ie in the direction of the intermediate wall 27 back - trailing employed by an angle ⁇ with respect to a parallel to the axis 16.
  • the ground material and the auxiliary grinding bodies 31 are drawn particularly intensively into the passages 22 and are forced into the gap space 28 by them.
  • the sum of the above-mentioned partial flows therefore corresponds approximately to the total volume flow of supplied through the grinding stock feed 11 and discharged through the grinding material discharge 13 Mahlgut volume flow, in which area due to the existing braid flow 32, the normal concentration of Mahlangeskörpem 31 is present in the millbase, which are also conveyed through through the passages 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Claims (9)

  1. Broyeur agitateur, comprenant
    - un réservoir de broyage (2),
    -- qui entoure une chambre de broyage (10),
    -- dans lequel débouche, à une extrémité, une alimentation (11) de matière à broyer, et
    -- duquel débouche, à l'autre extrémité, une sortie (13) de matière broyée, et
    -- reçoit des corps auxiliaires de broyage (31),
    - un agitateur (6) disposé dans la chambre de broyage (10), qui présente
    -- un arbre agitateur (5) pouvant être entraîné en rotation et ayant un axe (16),
    -- un dernier disque agitateur (17, 17') d'un diamètre b', disposé sur l'arbre agitateur (5) et adjacent à la sortie (13) de matière broyée, et
    -- des disques agitateurs (14) d'un diamètre b, disposés axialement sur l'arbre agitateur (5) en amont du dernier disque agitateur (17, 17') et axialement écartés l'un de l'autre d'une distance a,
    -- des disques agitateurs (14) placés en amont et adjacents entre eux définissant un angle de séparation α, et le dernier disque agitateur (17, 17') et le disque agitateur (14) adjacent définissant un angle de séparation β,
    -- chaque angle de séparation α, β étant formé par une ligne (33) entre une extrémité radialement intérieure (35) d'un disque agitateur (14, 17, 17') sur l'arbre agitateur (5) et le bord extérieur (36) d'un disque agitateur (14) adjacent et par une ligne (34) parallèle à l'axe (16), et
    -- où s'applique la relation : 30° < α < 60°,
    - un dispositif (25) de séparation matière à broyer/corps auxiliaires de broyage, placé en amont de la sortie (13) de matière broyée, qui présente
    -- un dispositif de tamisage (23) placé directement en amont de la sortie (13) de matière broyée, et
    -- une cage (19) munie de découpures radiales (20), entourant le dispositif de tamisage (23) dans la direction de l'axe (16) et solidaire du dernier disque agitateur (17, 17'), et
    - des passages (22) formés dans le dernier disque agitateur (17, 17') de manière adjacente à l'arbre agitateur (5) et débouchant dans le dispositif de séparation (25),
    caractérisé en ce que
    la relation 30° < α < 60° vaut également pour l'angle de séparation β entre le dernier disque agitateur (17, 17') et le disque agitateur (14) adjacent, et en ce qu'est disposée, dans le dispositif de séparation (25) entre le dernier disque agitateur (17, 17') et le dispositif de tamisage (23), une cloison (27, 27') reliée solidaire en rotation avec l'agitateur (6) et s'étendant au moins sur le diamètre d du dispositif de tamisage (23).
  2. Broyeur agitateur selon la revendication 1, caractérisé en ce que s'applique pour le diamètre c de la cloison (27, 27') par rapport au diamètre d du dispositif de tamisage la relation : c ≥ d.
  3. Broyeur agitateur selon la revendication 2, caractérisé en ce que la cloison (27, 27') s'étend jusqu'à proximité de la cage (19).
  4. Broyeur agitateur selon la revendication 1, caractérisé en ce que des pièces d'écartement (29) sont prévues entre la cloison (27') et le dernier disque agitateur (17).
  5. Broyeur agitateur selon la revendication 1, caractérisé en ce que la distance a' du dernier disque agitateur (17, 17') par rapport au disque agitateur (14) directement adjacent est identique à l'écartement mutuel a de tous les disques agitateurs (14) placés en amont.
  6. Broyeur agitateur selon la revendication 1, caractérisé
    en ce que les disques agitateurs (14) placés en amont sont munis d'ouvertures (15), et
    en ce que le dernier disque agitateur (17') est pourvu d'évidements (30) sur son côté orienté vers le disque agitateur (14) adjacent.
  7. Broyeur agitateur selon la revendication 6, caractérisé en ce que les évidements (30) sont de même section que les ouvertures (15).
  8. Broyeur agitateur selon la revendication 1, caractérisé en ce que les diamètres b, b' de tous les disques agitateurs (14, 17) sont identiques.
  9. Broyeur agitateur selon la revendication 1, caractérisé en ce que les parois (37) des passages (22) sont formées en position arrière à l'opposé du sens de rotation (38) de l'arbre agitateur (5) dans la direction de la cloison (27, 27').
EP07801726A 2007-08-17 2007-08-17 Broyeur agitateur Not-in-force EP2178643B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/007279 WO2009024159A1 (fr) 2007-08-17 2007-08-17 Broyeur agitateur

Publications (2)

Publication Number Publication Date
EP2178643A1 EP2178643A1 (fr) 2010-04-28
EP2178643B1 true EP2178643B1 (fr) 2011-01-19

Family

ID=39262687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801726A Not-in-force EP2178643B1 (fr) 2007-08-17 2007-08-17 Broyeur agitateur

Country Status (6)

Country Link
EP (1) EP2178643B1 (fr)
CN (1) CN101801532B (fr)
AT (1) ATE495819T1 (fr)
DE (1) DE502007006343D1 (fr)
ES (1) ES2356855T3 (fr)
WO (1) WO2009024159A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123408A1 (de) 2021-09-09 2023-03-09 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PE20120237A1 (es) 2008-12-19 2012-04-14 Xstrata Technology Pty Ltd Molino de desgaste por rozamiento
DE102010049827A1 (de) * 2010-10-27 2012-05-03 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle
CN103056011B (zh) * 2013-01-24 2016-05-11 陈波 一种强制双向垂直环流研磨***
CN103657800B (zh) * 2013-12-19 2016-05-11 占天义 搅拌式研磨***
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
CN103657802B (zh) * 2013-12-31 2016-08-17 深圳市博亿化工机械有限公司 搅拌式研磨装置
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
PL3311921T3 (pl) * 2016-10-18 2019-03-29 Willy A. Bachofen Ag Młyn kulowy z mieszadłem
CN112958230A (zh) * 2021-03-14 2021-06-15 上海琥崧智能科技股份有限公司 一种新型盘式隔块高效研磨装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333804A (en) * 1993-08-20 1994-08-02 Premier Mill Corp. Agitator mill
JP3800556B2 (ja) * 1994-04-11 2006-07-26 マウント アイザ マインズ リミテッド アトリションミル及びスラリー内の粒子選別方法
DE4448043B4 (de) * 1994-04-11 2007-12-13 Erich Netzsch Gmbh & Co Holding Kg Rührwerksmühle
DE4432203A1 (de) 1994-09-09 1996-03-14 Evv Vermoegensverwaltungs Gmbh Rührwerksmühle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123408A1 (de) 2021-09-09 2023-03-09 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle

Also Published As

Publication number Publication date
ES2356855T3 (es) 2011-04-13
WO2009024159A1 (fr) 2009-02-26
DE502007006343D1 (de) 2011-03-03
ATE495819T1 (de) 2011-02-15
CN101801532B (zh) 2012-06-27
EP2178643A1 (fr) 2010-04-28
CN101801532A (zh) 2010-08-11

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