EP0214145B1 - Dispergierverfahren und rührwerksmühle zu seiner durchführung - Google Patents

Dispergierverfahren und rührwerksmühle zu seiner durchführung Download PDF

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Publication number
EP0214145B1
EP0214145B1 EP85904973A EP85904973A EP0214145B1 EP 0214145 B1 EP0214145 B1 EP 0214145B1 EP 85904973 A EP85904973 A EP 85904973A EP 85904973 A EP85904973 A EP 85904973A EP 0214145 B1 EP0214145 B1 EP 0214145B1
Authority
EP
European Patent Office
Prior art keywords
grinding medium
container
stirred ball
mill
mill base
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
Application number
EP85904973A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0214145A1 (de
Inventor
Friedrich Vock
Gerd Dr. Kissau
Klaus Warnke
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.)
BASF Farben und Fasern AG
Original Assignee
BASF Lacke und Farben 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 BASF Lacke und Farben AG filed Critical BASF Lacke und Farben AG
Priority to AT85904973T priority Critical patent/ATE40056T1/de
Publication of EP0214145A1 publication Critical patent/EP0214145A1/de
Application granted granted Critical
Publication of EP0214145B1 publication Critical patent/EP0214145B1/de
Expired 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

Definitions

  • the invention relates to a dispersion method according to the preamble of claim 1 (see Chem. Techn., 24th vol., Volume 1, January 1972, pages 22 to 26).
  • agitator mills contain grinding media, e.g. Sand, and the energy is supplied by the movement of rotors arranged in the agitator mill.
  • the grinding chamber of the agitator mill is filled to 70 to 90% by volume with sand.
  • the regrind flows through the grinding chamber in the axial direction.
  • the throughput of the material to be ground through the grinding pot is generally selected so that the prescribed nominal fineness is achieved after one or more passages. This procedure is often called one-pass or multiple-pass procedure.
  • the production output achievable with this procedure can be increased significantly if the procedure described in DE-PS 2 230 766 or DE-OS 1 902 152 is used.
  • this circular mode of operation high mill throughputs flow through the mill, and after leaving the mill, the mill material flows back into a container from which it is pumped back into the mill.
  • the regrind flows in the so-called pendulum mode from a container with high throughputs through the agitator mill into a second container. This process is repeated until the desired fineness is reached.
  • the invention therefore relates to a dispersion method according to claim 1.
  • this object can be achieved by reducing the degree of filling of the grinding container on grinding media and by selecting the speed of the rotors such that the grinding media filling forms a rotating hollow cylinder in the agitator mill due to the centrifugal force.
  • the path of the ground material through the bed of grinding media is shorter than in the working method according to the prior art. This is compensated for by the fact that the regrind has to pass through the grinding media more frequently. The drag forces acting radially from the outside inward cause the grinding media to swirl in the centrifugal field. Overall, it is advantageous to choose a high radial flow rate. Despite this high flow rate, a very effective dispersion is surprisingly achieved, the circular mode or the pendulum mode reducing the total dispersion time and the effort for monitoring the process. With this procedure, the dispersion of temperature-sensitive goods can also be carried out without any problems, since only a slight increase in the temperature of the ground material can be detected per passage through the agitator mill. This heat can easily be extracted from the regrind in an external cooler. With this procedure, a significant reduction in the dispersing energy used is additionally achieved compared to the passage mode.
  • fine grinding media can be used at high throughputs through the mill, the use of which in state-of-the-art machines is not possible because they are washed onto the separating screen at high throughputs.
  • the invention also relates to an agitator mill for carrying out the dispersion process.
  • 1 denotes a grinding container in which rotors 2 designed as paddles are arranged.
  • the ground material is fed in at 3, and at 4 a sieve is shown. 5 with a reservoir is designated.
  • the rotors 2 are driven via a hollow shaft 6, which can simultaneously serve to discharge the ground material.
  • a turret seal is shown and 8 is the required pump.
  • 9 denotes a manometer and 10 denotes the grinding media bed inside the grinding container 1.
  • the ratio of length to diameter of the grinding container 1 is 0.5: 1 to 1.5: 1.
  • a drain sieve for residual products is shown and the grist outlet is indicated by arrow 12, while the grist inlet is indicated by arrow 13.
  • the cooling water inlet is shown at 14 and the cooling water outlet is shown at 15.
  • FIG. 2 an idealized millbase path is shown at 16, while the arrows 17 and 18 indicate the radial speed of the millbase or the peripheral speed of the millbase.
  • grinding media fillings in agitator mills are subject to wear and tear, the resulting grinding media shrinkage has to be supplemented from time to time for optimal operation, the setting of the amount of grinding media to be supplemented is best determined via the power consumption of the rotating agitator mill rotor, but this is only possible with today's agitator mills Very complex refill devices are possible, which is surprisingly solved by the idea of the invention in a simple manner that, while the rotor is running, the required grinding media refill quantities can be metered freely into the grinding media-free center via a feed tube until a specified setpoint value for the power consumption of the rotor is reached.
  • the ordinate shows the fineness curve Xmax Hegman of a suspension as a function of time.
  • Curve 19 shows that the suspension has reached a fineness according to Hegman of 35 ⁇ m after a passage corresponding to 400 min and has reached the fineness 19 m after two passages corresponding to 780 min.
  • Curve 20 shows that this result can be achieved in a significantly shorter time with a circulatory procedure.
  • FIG. 4 shows, as in FIG. 1, a cross section through an agitator mill according to the invention, but now with a fixed cylindrical separating sieve 4.
  • Fig. 7 shows, in a representation corresponding to Fig. 5, screens 4 arranged on a pitch circle, but this time fixed, i.e. are not designed to rotate.
  • FIG. 8 shows a stationary immersion tube 21 as grinding media separating device, which projects into the grinding media-free space. A sieve is not provided.
  • FIG. 9 shows, as grinding media separating device, a screen 22 rotating in the grinding media-free space, the speed of which is independent of the speed of the rotor drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Disintegrating Or Milling (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP85904973A 1984-10-16 1985-10-09 Dispergierverfahren und rührwerksmühle zu seiner durchführung Expired EP0214145B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85904973T ATE40056T1 (de) 1984-10-16 1985-10-09 Dispergierverfahren und ruehrwerksmuehle zu seiner durchfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843437866 DE3437866A1 (de) 1984-10-16 1984-10-16 Dispergierverfahren und ruehrwerksmuehle zu seiner durchfuehrung
DE3437866 1984-10-16

Publications (2)

Publication Number Publication Date
EP0214145A1 EP0214145A1 (de) 1987-03-18
EP0214145B1 true EP0214145B1 (de) 1989-01-18

Family

ID=6247996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904973A Expired EP0214145B1 (de) 1984-10-16 1985-10-09 Dispergierverfahren und rührwerksmühle zu seiner durchführung

Country Status (9)

Country Link
US (1) US5011089A (enExample)
EP (1) EP0214145B1 (enExample)
JP (2) JPS62500503A (enExample)
BR (1) BR8507233A (enExample)
CA (1) CA1272174A (enExample)
DE (2) DE3437866A1 (enExample)
ES (1) ES8703296A1 (enExample)
WO (1) WO1986002286A1 (enExample)
ZA (1) ZA857434B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128074A1 (de) * 1991-08-23 1993-02-25 Omya Gmbh Ruehrwerkskugelmuehle

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727863C1 (de) * 1987-08-20 1989-03-02 Netzsch Erich Holding Ruehrwerksmuehle mit Zufuehrrohr fuer Mahlkoerper
NZ226551A (en) * 1987-10-20 1990-03-27 Ici Australia Operations Fine grinding of ceramic particles in attrition mill
JP2579984B2 (ja) * 1988-01-28 1997-02-12 株式会社クボタ 粒状体の製造方法及びその製造装置
DE4007768A1 (de) * 1990-03-12 1991-09-19 Basf Ag Dispergierverfahren und ruehrwerksmuehle zu seiner durchfuehrung
DE4009092C1 (enExample) * 1990-03-21 1991-05-23 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De
JPH04166246A (ja) * 1990-10-31 1992-06-12 Matsushita Electric Ind Co Ltd 媒体撹拌ミル及び粉砕方法
DE4216939C2 (de) * 1992-05-22 1995-01-26 Kneisl Wendelin Dipl Ing Th Rührwerksmühle mit dynamischer Mahlkörperabtrennung
US5269234A (en) * 1992-10-20 1993-12-14 Continental Cement Company Method for processing solid, Hazardous waste material for use as a fuel
US5333804A (en) * 1993-08-20 1994-08-02 Premier Mill Corp. Agitator mill
US5746916A (en) * 1994-01-26 1998-05-05 Mitsubishi Rayon Co., Ltd. Microporous membrane made of non-crystalline polymers and method of producing the same
DE4432154A1 (de) * 1994-09-09 1996-03-14 Evv Vermoegensverwaltungs Gmbh Verfahren und Vorrichtung zum kontinuierlichen Aufschließen von organischen Bestandteilen eines fließfähigen Behandlungsguts
DE4432153A1 (de) * 1994-09-09 1996-03-14 Evv Vermoegensverwaltungs Gmbh Verfahren und Vorrichtung zum kontinuierlichen autogenen Mahlen eines fließfähigen Behandlungsguts
PL192081B1 (pl) 1997-08-29 2006-08-31 Lowan Man Pty Ltd Sposób mielenia rozdrobnionego materiału i młyn do rozdrobnionego materiału
AU732830B2 (en) * 1997-08-29 2001-05-03 Lowan (Management) Pty Limited Grinding mill
DE19819967B4 (de) * 1998-05-05 2007-04-26 BüHLER GMBH Rührwerksmühle
US6450428B1 (en) 1999-05-05 2002-09-17 Lowan (Management) Pty Limited Feed arrangement for grinding mill incorporating fluid feed
AU2003902661A0 (en) * 2003-05-29 2003-06-12 Hicom International Pty Ltd Centrifugal grinding mills
JP4785355B2 (ja) * 2004-06-28 2011-10-05 関西ペイント株式会社 アニュラー型ビーズミル、該ビーズミルを備える顔料分散システム、及び該顔料分散システムを用いた顔料分散方法
EP1943022B1 (de) * 2005-10-11 2010-03-31 Bühler AG Rührwerksmühle
CN107309054A (zh) * 2017-06-29 2017-11-03 马鞍山市恒达轻质墙体材料有限公司 一种加气砖中粉料的生产装置
CN107970856B (zh) * 2017-12-13 2024-01-23 北方奥钛纳米技术有限公司 高效分散装置
DE102021101527B4 (de) 2021-01-25 2023-05-17 Wilhelm Niemann Gmbh & Co. Rührwerksmühle

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DE707525C (de) * 1936-04-21 1941-06-25 August Schaich Dr Ing Wirbelmuehle
US2592994A (en) * 1942-05-28 1952-04-15 Smidth & Co As F L Method and apparatus for grinding by the use of grinding bodies subjected to centrifugal force
US3251578A (en) * 1961-06-15 1966-05-17 Socony Mobil Oil Co Inc Dispersing and grinding apparatus and method of dispersing and grinding paste
CH477229A (de) * 1967-03-21 1969-08-31 Vyzk Ustav Organ Syntez Vorrichtung zum Dispergieren von Suspensionen fester Teilchen auf kolloidale Feinheit
CH477916A (de) * 1967-07-01 1969-09-15 Vyzk Ustav Organickych Synthes Einrichtung zum Vermahlen fester Teilchen in trockenem Zustand
US3550915A (en) * 1968-04-10 1970-12-29 Vyzk Ustav Organ Syntez Agitating apparatus
DE1902152A1 (de) * 1969-01-17 1970-07-30 Draiswerke Gmbh Verfahren und Vorrichtung zum diskontinuierlichen Zerkleinern von in Fluessigkeit suspendierten Teilchen
DE2110336A1 (de) * 1971-03-04 1972-09-07 Draiswerke Gmbh Ruehrwerksmuehle
DE2230766C3 (de) * 1971-07-27 1980-03-06 Union Process International Inc., Akron, Ohio (V.St.A.) Verfahren und Vorrichtung zum Zerkleinern von in einer Flüssigkeit suspendierten Feststoffen
US3799455A (en) * 1972-06-19 1974-03-26 A Szegvari Method for reacting materials
US4044957A (en) * 1976-02-13 1977-08-30 Schold George R Apparatus for dispersing finely divided solid particles in a liquid vehicle
ES449975A1 (es) * 1976-07-20 1977-07-01 Oliver & Battle Sa Mejoras en los molinos de eje horizontal refrigerados, para productos predispersados de solidos en liquidos.
AT367657B (de) * 1978-08-24 1982-07-26 Buehler Ag Geb Ruehrwerkskugelmuehle-regelung
JPS5892468A (ja) * 1981-11-27 1983-06-01 株式会社三井三池製作所 竪型メデイヤ撹拌乾式粉砕機
DE3345680A1 (de) * 1983-12-16 1985-06-20 Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb Ruehrwerksmuehle
US4742966A (en) * 1985-06-21 1988-05-10 Morehouse Industries, Inc. Media mill screen assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128074A1 (de) * 1991-08-23 1993-02-25 Omya Gmbh Ruehrwerkskugelmuehle

Also Published As

Publication number Publication date
JPH089017B2 (ja) 1996-01-31
WO1986002286A1 (fr) 1986-04-24
JPS62500503A (ja) 1987-03-05
ES547946A0 (es) 1987-02-16
DE3567584D1 (en) 1989-02-23
ES8703296A1 (es) 1987-02-16
ZA857434B (en) 1986-05-28
EP0214145A1 (de) 1987-03-18
US5011089A (en) 1991-04-30
DE3437866A1 (de) 1986-04-17
BR8507233A (pt) 1987-10-27
JPH0342052A (ja) 1991-02-22
CA1272174A (en) 1990-07-31
JPH0261298B2 (enExample) 1990-12-19

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