EP0640397A2 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0640397A2
EP0640397A2 EP94113127A EP94113127A EP0640397A2 EP 0640397 A2 EP0640397 A2 EP 0640397A2 EP 94113127 A EP94113127 A EP 94113127A EP 94113127 A EP94113127 A EP 94113127A EP 0640397 A2 EP0640397 A2 EP 0640397A2
Authority
EP
European Patent Office
Prior art keywords
agitator mill
separating device
mill according
static
passage opening
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
EP94113127A
Other languages
German (de)
English (en)
Other versions
EP0640397B1 (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

  • Agitator mills of the type mentioned above are known, for example, from DE-GM 90 04 117.8 and DE-A-40 10 926.7.
  • the static separating device is in this case formed by a sieve, preferably a slotted sieve, which is arranged either rotating or stationary on the outlet side of the grinding chamber.
  • a disadvantage of such designs is that the sieve can become clogged by auxiliary grinding bodies and their fragments in the course of a longer period of operation and, in addition, when the agitator mill is switched off, the grinding material suspension (together with auxiliary grinding bodies and their fragments) becomes attached to the sieve, which can be disadvantageous Cases closes the passage openings of the static separator so far that restarting the agitator mill before intensive cleaning or changing the sieve is impossible.
  • DD-A 45 700 also discloses a dispersing device in which a conically shaped ring sieve is connected to the agitator shaft, which tapers downward into the suction area of a stirring disk attached to the agitator shaft.
  • a free annular gap is provided between the lower end of the sieve and the agitator shaft, which is two to three times as wide as the diameter of the largest grinding media.
  • the invention has for its object to design an agitator mill of the type mentioned in such a way that on the one hand an operationally reliable, trouble-free separation of auxiliary grinding bodies and their fragments from the ground material suspension takes place and on the other hand maintenance work, in particular on the static separating device, is greatly reduced.
  • a dynamic separating device is also provided on the outlet side of the grinding chamber, which has at least one passage opening delimited by elements which are movable relative to one another and which is dimensioned in such a way that the ground material passes, but the auxiliary grinding bodies be held back.
  • the agitator mill can be restarted without high pressure build-up in the mill in that in this case the dynamic separating device frees itself up and thus the ground material suspension in the starting phase can flow through the dynamic separation device.
  • the suspension dried on the static separating device is loosened automatically (ie without any special maintenance measure) and the separating device is thus flushed out after a short time, so that an additional cleaning process which leads to an interruption in operation is unnecessary.
  • the free passage opening of the static separation device is added to the free passage opening of the dynamic separation device in normal operation, the total passage opening of the static and dynamic separation device is thus relatively large, the pressure build-up in the operation of the agitator mill remains small. This largely prevents fragments of auxiliary grinding bodies from being pressed into the static or dynamic separating device.
  • the combined separating device also offers the possibility of processing pseudoplastic or highly thixotropic products without increasing pressure, since the dynamic separating device reduces thixotropies or structural viscosities due to the resulting shear rate.
  • the agitator mill shown in FIG. 1 contains a housing 1 and a rotor 2.
  • the hub body 21 of the rotor 2 is seated on a shaft 3, which is mounted in a bearing pot 5 of the housing 1 by means of a bearing 4 and by a (not illustrated) drive motor from is driven above.
  • a rotor 22 which is firmly connected to the hub body 21, projects as a displacement body into a recess 13 in the housing 1.
  • the housing 1 In its lower, funnel-shaped area, the housing 1 forms a feed chamber 8 for the regrind fed in the direction of the arrow 7.
  • the feed chamber 8 is connected to the grinding chamber 6 via an annular channel 9 and a material inlet 15.
  • a static separating device formed by a slotted screen 20 and on the other hand a dynamic separating device designed as a friction gap 25 is provided. The details of these two separation devices are explained in detail with reference to FIG. 2.
  • 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 auxiliary grinding bodies pass from the outlet side 26 of the grinding chamber via return channels 34 to the inlet side of the grinding chamber 6, ie to the area of the material inlet 15.
  • FIG. 2 shows the details of the static and dynamic separation device of the agitator mill according to FIG. 1.
  • the static separating device is formed by the slotted screen 20, which is cylindrical and is arranged coaxially to the axis 10 of the shaft 3.
  • the slotted screen 20 is made of triangular profile wire and has separating gaps 20a.
  • These passage openings (separating gaps 20a) of the static separating device (slotted sieve 20), which are delimited by elements which are not movable relative to one another, are dimensioned in such a way that the ground material passes through, but the auxiliary grinding bodies 27 are retained.
  • the slotted screen 20 is clamped between two hub parts 28 and 29 which are fixedly connected to the shaft 3. It therefore rotates with the shaft 3 and the rotor 22.
  • Axial channels 30 are provided in the hub part 29, through which the ground material reaches the outlet channel 23 from the space 31 which is not closed by the slotted screen 20.
  • the friction gap 25 forming the dynamic separating device is delimited by a ring 32 connected to the housing 1 and accordingly arranged in a stationary manner, and by a ring 33 carried and accordingly rotating by the hub part 29.
  • the two rings 32, 33 are made of wear-resistant material.
  • the passage opening formed by the annular gap 25 is in its Size so that the crushed ground material passes through, the grinding aid 27 are held against it.
  • the friction gap 25 connects the outlet side 26 of the grinding chamber 6 directly to the outlet channel 23.
  • the ground material comminuted in the grinding chamber 6 flows from the outlet side 26 of the grinding chamber through the slotted screen 20 as well as through the friction gap 25 into the outlet channel 23, while the auxiliary grinding bodies 27 are retained. If after a longer standstill of the agitator mill the two separating devices are clogged by dried millbase suspension, when the mill is started again by the rotary movement of the ring 33 relative to the stationary ring 32 the friction gap 25 is immediately exposed so that the millbase suspension flows from the outlet side 26 to the outlet channel 23 can. The flow movement thereby set in on the outlet side 26 loosens the millbase suspension dried on the slotted screen 20 in a short time, so that the slotted screen 20 is also flushed out after a short time. During further operation, both the static separating device and the dynamic separating device then contribute to separating the ground material suspension from the auxiliary grinding bodies, which in view of the relatively large total passage opening of the two separating devices leads to a low pressure build-up inside the mill.
  • the same reference numerals are used for the same elements.
  • the ring 32 of the dynamic separation device is in a corresponding in this embodiment large dimensioned recess 35 of the housing 1 floating. In this way, eccentric manufacturing tolerances can be compensated, which enables the setting of a very narrow friction gap 25.
  • the exemplary embodiment according to FIG. 4 differs from the variant shown in FIG. 2 by the use of a conical slotted screen 20.
  • centrifugal vanes 36 are arranged at a radial distance in front of the slotted sieve 20, which swirl the ground material suspension in the entrance area of the slotted sieve 20 and thus delay clogging of the slotted sieve 20.
  • centrifugal blades 36 can be helical and can be arranged so that dragged auxiliary grinding bodies 27 are removed from the dynamic separating device, i.e. are promoted away from the friction gap 25. In this way, in particular the wear of the rings 32 and 33 delimiting the friction gap can be reduced.
  • FIG. 6 shows a variant in which the slotted screen 20 is arranged in a fixed manner between the housing 1 and a component 37 which is also fixed to the housing.
  • the component 37 also carries the stationary ring 32 of the dynamic separation device, the rotating ring 33 of which is supported by the hub part 29 which is connected to the shaft 3 in a rotationally fixed manner.
  • the space 38 located on the downstream side of the slotted screen 20 and the friction gap 25 communicates with the outlet duct 23.
  • the gap widths of the dynamic friction gap 25 and the gap sieve 20 are chosen between 0.05 mm and 3 mm in the agitator mill according to the invention, depending on the application.
  • the friction gap expediently has a width which is 1/4 to 1/3 of the diameter of the auxiliary grinding bodies.
  • the passage opening of the static separation device and the passage opening of the dynamic separation device can be dimensioned differently in this case.
  • the elements of the slotted screen 20 delimiting the separating gaps 20a can have a triangular shape (see FIGS. 2, 3, 5, 6) or a rectangular shape (see FIG. 4).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
EP94113127A 1993-08-31 1994-08-23 Broyeur agitateur Expired - Lifetime EP0640397B1 (fr)

Applications Claiming Priority (2)

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

Publications (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113828395A (zh) * 2021-09-03 2021-12-24 南京利卡维智能科技有限公司 一种多轴研磨机

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769338A (en) * 1994-11-14 1998-06-23 S Fimatec Ltd. Pulverulent body processing apparatus and method of manufacturing a slit member to be used for the same
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
WO2006116338A2 (fr) * 2005-04-25 2006-11-02 Draiswerke, Inc. Broyeur-agitateur a etages multiples
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1080149A (en) * 1965-12-08 1967-08-23 Inst Chemieanlagen Dispersion device
US4067505A (en) * 1976-11-06 1978-01-10 Carlos Oliver Pujol Horizontal-axle grinder with rotatable sieve
DE3815156A1 (de) * 1987-10-26 1989-11-16 Buehler Ag Geb Ruehrwerksmuehle
DE9004117U1 (de) * 1990-04-09 1991-08-08 Fryma-Maschinen Ag, Rheinfelden Mühle für fließfähiges Mahlgut mit einem spaltförmigen Mahlraum

Family Cites Families (12)

* 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
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
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
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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1080149A (en) * 1965-12-08 1967-08-23 Inst Chemieanlagen Dispersion device
US4067505A (en) * 1976-11-06 1978-01-10 Carlos Oliver Pujol Horizontal-axle grinder with rotatable sieve
DE3815156A1 (de) * 1987-10-26 1989-11-16 Buehler Ag Geb Ruehrwerksmuehle
DE9004117U1 (de) * 1990-04-09 1991-08-08 Fryma-Maschinen Ag, Rheinfelden Mühle für fließfähiges Mahlgut mit einem spaltförmigen Mahlraum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113828395A (zh) * 2021-09-03 2021-12-24 南京利卡维智能科技有限公司 一种多轴研磨机
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

Also Published As

Publication number Publication date
DE59408161D1 (de) 1999-06-02
EP0640397B1 (fr) 1999-04-28
ATE179344T1 (de) 1999-05-15
EP0640397A3 (fr) 1995-07-05
JPH0780339A (ja) 1995-03-28
US5518191A (en) 1996-05-21
DE4329339A1 (de) 1995-03-02
DK0640397T3 (da) 1999-10-25

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