EP0058886A2 - Broyeur agitateur - Google Patents

Broyeur agitateur Download PDF

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Publication number
EP0058886A2
EP0058886A2 EP82101000A EP82101000A EP0058886A2 EP 0058886 A2 EP0058886 A2 EP 0058886A2 EP 82101000 A EP82101000 A EP 82101000A EP 82101000 A EP82101000 A EP 82101000A EP 0058886 A2 EP0058886 A2 EP 0058886A2
Authority
EP
European Patent Office
Prior art keywords
grinding
return
channel
agitator
agitator mill
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
EP82101000A
Other languages
German (de)
English (en)
Other versions
EP0058886A3 (en
EP0058886B1 (fr
Inventor
Horst Gross
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 EP0058886A2 publication Critical patent/EP0058886A2/fr
Publication of EP0058886A3 publication Critical patent/EP0058886A3/de
Application granted granted Critical
Publication of EP0058886B1 publication Critical patent/EP0058886B1/fr
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
    • 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 according to the preamble of claim 1.
  • Such an agitator mill with a cylindrical grinding chamber between an agitator formed by an agitator shaft with a cylindrical hollow body on the one hand and the inner wall of the grinding container on the other hand is known from DE-AS 11 84 188.
  • Such very narrow cylindrical grinding spaces with a gap width of about 5 to 15 mm have the advantage that the individual particles of the ground material in suspension or dispersion are exposed to grinding and shear forces very uniformly, so that the scatter in the fineness of grinding becomes very small . Since the radial extension of the actual grinding chamber is very small, the auxiliary grinding bodies accumulate in front of the separating device, since backflow is not sufficiently ensured, although the auxiliary grinding bodies move freely in the cylindrical grinding chamber flow in the grinding material / auxiliary grinding body flow during the grinding process.
  • This known principle of grinding aid return has the disadvantage that it is not possible to influence the return of the grinding aid, since the return is carried out by the high-speed stirrer which is practically inaccessible when the agitator mill is closed.
  • the invention is therefore based on the object of developing an agitator mill of the generic type in such a way that a return of the auxiliary grinding bodies is made possible in a simple manner, which in particular also enables the return to be influenced.
  • the return channel formed on the grinding container By returning the auxiliary grinding bodies through the return channel formed on the grinding container, the return is realized in a structurally very simple manner. Since the return channel is formed on the grinding container, an observation window can be attached in a very simple manner, through which an optical control is possible. Furthermore, the regrind also circulates through this channel, preferably the regrind particles which have not yet been comminuted sufficiently. The reason for this is that the auxiliary grinding bodies and also the corresponding portions of the ground material are returned by the centrifuging action of the agitator. A suction effect is generated by the opening of the return duct into the ground material inlet duct, which still supports the centrifuging effect. In addition, there is good premixing of regrind and auxiliary grinding media in the regrind inlet channel.
  • a great advantage of the configuration according to the invention is that the additional measures according to claim 3 are made possible.
  • the possibility of cross-section adjustment ensures that the agitator mill data, such as maximum energy utilization, i. high efficiency, is achievable.
  • the grinding media return can be influenced as a function of pressure, viscosity, throughput speed, temperature and grinding media size, which in turn allows the desired fineness of the grinding stock to be optimally influenced.
  • Claims 4 to 7 represent particularly advantageous measures for the design of the return channel and the adjustability of the free cross section of the return channel.
  • the adjustability of the free cross section can be regulated as a function of the operating parameters of the agitator mill, for example as a function of the power consumption of the drive motor.
  • the agitator mill shown in the drawing has in the usual way a stand 1, on the top of which a projecting support arm 2 is attached, to which in turn a cylindrical grinding container 3 is attached.
  • an electric drive motor 4 is accommodated, which is provided with a V-belt pulley 5, of which a V-belt pulley 8, which is non-rotatably connected to an agitator shaft 7, can be driven in rotation by means of the V-belt 6.
  • the grinding container 3 has a cooling jacket 9, which is delimited by a cylindrical inner wall 10 and a cylindrical outer wall 12 which is arranged concentrically to the central longitudinal axis 11 of the grinding container 3.
  • the inner wall 10 and the outer wall 12 are connected to one another at the top and bottom by annular flanges 13, 14.
  • a cooling water connection 15 opens at the bottom and a cooling water outlet 16 at the top.
  • a helically coiled pipeline 17 is arranged in the cooling jacket and bears against the inner wall 10 and the outer wall 12. In the subspaces of the cooling jacket 9 located between them, the cooling water is guided in a helical manner on its way from bottom to top, whereby the cooling effect is improved.
  • the pipeline 17 itself can be used to transport a heat transfer medium, for example a heating medium.
  • the grinding container 3 is closed at its lower end by a base plate 18 which is attached to the lower flange 13, for example by means of screws 19.
  • a mill feed channel 2o is formed, which opens approximately concentrically into the interior 21 of the grinding container 3, and can be pumped into this interior 21 from below through the material to be ground.
  • a cylindrical hollow body 22 which is closed on its end faces, is concentrically attached, which together with the stirrer shaft 7 forms a stirrer.
  • a narrow cylindrical ring space 23 which forms the actual grinding chamber.
  • the radial width b of this cylindrical ring space 23 is approximately 5 to 10 mm.
  • the interior 21 of the grinding container 3 - as far as it is not filled by the hollow body 22 - its volume filled 7o to 8 0% with auxiliary grinding bodies 24, the diameter do, is from 1 to 3 mm.
  • the following applies to the ratio of the gap width to the diameter of the auxiliary grinding bodies 24: b / d 5 to 20 .
  • a separating device 25 essentially consists of a ring 26 connected to the hollow body 22, that is to say rotating with the agitator, and a mating ring 27 fixedly connected to the grinding container 3, which overlap one another radially at a small axial distance, whereby a separating gap 28 is formed, the - determined by the axial distance between the ring 26 and the counter ring 27 - width is smaller than the smallest diameter d of the grinding aid body 24 used.
  • This separation gap 28 opens into a discharge space 29 which is formed between the stationary counter ring 27 and a cover 30 of the grinding container 3 .
  • a regrind outlet line 31 opens out, through which the ground regrind is discharged.
  • the separating device 25 is known for example from DE-PS 14 82 391.
  • the lid 3o is detachably fastened together with the counter ring 27 by means of screws 32 to the upper flange 14 of the grinding container 3.
  • the lid 3o itself is attached to a holding device 33, which is attached to the underside of the support arm 2, so that the grinding container 3 can be flanged from below in a conventional manner.
  • a tubular return channel 34 for regrind and auxiliary grinding body 24 is attached, which opens at the bottom into the regrind inlet channel 2o.
  • the return channel 34 is connected to the upper end of the cylinder ring space 23 via a return pipe which extends approximately radially to the longitudinal axis 11.
  • the inlet opening 36 of the nozzle 35 is thus just covered by the cylindrical hollow body 22.
  • the free cross section of the connector 35 or the channel 34 can be changed. This is achieved in the embodiment according to FIG. 2 in that an adjusting element 37 in the form of a displaceable piston is inserted from the outside into the socket 35, which can be inserted into the socket 35 at different depths, so that the entry into the return channel is either complete is released or partially covered.
  • This piston-shaped adjusting element is provided with a deflection surface 38, which deflects the ground material and in particular the grinding media on their way from the socket 35 into the channel 134 without any appreciable energy conversion.
  • a position of the adjusting element 37 is indicated in broken lines in FIG. 2, in which the free inlet cross section of the return channel 34 is approximately half closed.
  • the operation is as follows:
  • the free interior of the grinding vessel 3 is - as mentioned - filled 7o to 8 0% with auxiliary grinding bodies 24th
  • the agitator shaft 7 and thus the hollow body 22 are driven at high speed by the drive motor 4, ie for example at a speed of 100 rpm.
  • the mill feed channel 2o Through the mill feed channel 2o, the millbase is pressed into the interior 21 by means of a pump, which together with the mill auxiliary bodies 24 through the cylinder ring space 23, that is, the actual grinding chamber, rises to the top, the auxiliary grinding bodies 24 being acted upon by the hollow body 22 with angular momentum, which lead to intensive movements of the auxiliary grinding bodies 24 in the material to be ground, as a result of which fine grinding and Dispersion effect is achieved.
  • auxiliary grinding bodies 24 When the auxiliary grinding bodies 24 reach the height of the inlet opening 36 of the return nozzle 35, at least most of them are pressed by the centrifugal action into the return nozzle and pass through this and the return channel 34, from where they again enter the grinding material inlet. Channel 2o arrive. In this they are already mixed intensively with the regrind that is pumped in, so that they are relatively evenly distributed in the regrind as they enter the interior 21 of the grinding container 3.
  • ground material is of course also conveyed back and fed again to the grinding and dispersing effect. This is essentially ground material which has not yet been ground sufficiently finely and has therefore not yet emerged from the grinding container through the separating device 25.
  • the larger, i.e. not yet sufficiently finely ground, particles are thrown into the wall area and therefore preferentially reach the return nozzle 35. Since a suction effect on the reflux channel from the regrind inlet channel 2o Channel 34 is exerted, the centrifugal effect at the inlet opening 36 of the nozzle 35 is increased. This suction effect is further reinforced by the fact that the mill feed channel 2o widens at the mouth 39 of the channel 34 in the channel 120 - seen in the pumping direction 4o. In addition, a deflection partial surface 41 is also formed at this point in order to keep the flow losses during transport of the grinding aid bodies as low as possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP82101000A 1981-02-19 1982-02-11 Broyeur agitateur Expired EP0058886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3106062 1981-02-19
DE19813106062 DE3106062A1 (de) 1981-02-19 1981-02-19 Ruehrwerksmuehle

Publications (3)

Publication Number Publication Date
EP0058886A2 true EP0058886A2 (fr) 1982-09-01
EP0058886A3 EP0058886A3 (en) 1984-05-30
EP0058886B1 EP0058886B1 (fr) 1986-05-07

Family

ID=6125219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101000A Expired EP0058886B1 (fr) 1981-02-19 1982-02-11 Broyeur agitateur

Country Status (5)

Country Link
US (1) US4496106A (fr)
EP (1) EP0058886B1 (fr)
JP (1) JPS57147449A (fr)
DE (2) DE3106062A1 (fr)
DK (1) DK154475C (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009212A1 (fr) * 1987-05-18 1988-12-01 Draiswerke Gmbh Melangeur-broyeur
EP0312932A2 (fr) * 1987-10-20 1989-04-26 Tioxide Specialties Limited Procédé de broyage
EP0322623A2 (fr) * 1987-12-28 1989-07-05 Inoue Seisakusho (Mfg) Co., Ltd. Appareil de dispersion et de broyage
EP0483808A1 (fr) * 1990-10-31 1992-05-06 Matsushita Electric Industrial Co., Ltd. Broyeur agitateur et procédé de broyage
DE4432200C1 (de) * 1994-09-09 1996-02-29 Evv Vermoegensverwaltungs Gmbh Rührwerksmühle
EP0700723A1 (fr) 1994-09-09 1996-03-13 EVV-Vermögensverwaltungs-GmbH Broyeur agitateur
EP0700721A1 (fr) 1994-09-09 1996-03-13 EVV-Vermögensverwaltungs-GmbH Broyeur agitateur
EP0982074A1 (fr) 1998-08-28 2000-03-01 DRAISWERKE GmbH Broyeur agitateur

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431142C2 (de) * 1984-08-24 1994-09-22 Fryma Masch Ag Mühle
JPH027626Y2 (fr) * 1985-01-16 1990-02-23
US4784336A (en) * 1987-03-10 1988-11-15 Lu Tsai Chuan Grinding machine for refining liquid material
US4850541A (en) * 1987-08-24 1989-07-25 Hagy John T Comminution apparatus
US5004165A (en) * 1989-02-06 1991-04-02 Spectrum Sciences B.V. Dispersion apparatus
US5048762A (en) * 1989-02-06 1991-09-17 Spectrum Sciences B.V. Dispersion apparatus
US5593097A (en) * 1994-06-10 1997-01-14 Eastman Kodak Company Micro media mill and method of its use
DE4432154A1 (de) * 1994-09-09 1996-03-14 Evv Vermoegensverwaltungs Gmbh Verfahren und Vorrichtung zum kontinuierlichen Aufschließen von organischen Bestandteilen eines fließfähigen Behandlungsguts
DE19632757A1 (de) * 1996-08-14 1998-02-19 Draiswerke Gmbh Rührwerksmühle
US6000646A (en) * 1998-03-16 1999-12-14 Ranne; Bethyl H. Double barrel media mill for grinding and dispersing particulate matter and pigment for paint, coatings, ink and other fluid pigment vehicles
US6300390B1 (en) 1998-06-09 2001-10-09 Kerr Corporation Dental restorative composite
US6121344A (en) * 1998-06-19 2000-09-19 Kerr Corporation Optimum particle sized hybrid composite
US6158680A (en) * 1998-09-29 2000-12-12 Ranne; Bill H. Multi-barrel media mill and method of grinding
US6010085A (en) * 1999-03-17 2000-01-04 Kerr Corporation Agitator mill and method of use for low contamination grinding
JP2007125518A (ja) * 2005-11-07 2007-05-24 Chuo Kakoki Kk 液状原料の処理装置および処理方法
US8062428B2 (en) * 2007-11-06 2011-11-22 University Of Central Florida Research Foundation, Inc. Solid acid catalyzed hydrolysis of cellulosic materials
FR2925066B1 (fr) * 2007-12-18 2014-12-19 Bertin Technologies Sa Dispositif de broyage d'un echantillon biologique
US8871739B2 (en) * 2008-11-05 2014-10-28 University Of Central Florida Research Foundation, Inc. Solid acid catalyzed hydrolysis of cellulosic materials
CA2901825C (fr) * 2013-02-28 2021-03-16 Outotec (Finland) Oy Procede de commande d'un procede destine a un broyeur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1343058A (fr) * 1961-10-27 1963-11-15 Nisso Seiko Kabushiki Kaisha Procédé et appareil de broyage
DE1184188B (de) * 1961-06-21 1964-12-23 Draiswerke Gmbh Ruehrwerksmuehle zur Herstellung von Feststoffdispersionen
DE1507504A1 (de) * 1966-04-05 1969-07-31 Draiswerke Gmbh Ruehrwerkmuehle
US4065060A (en) * 1976-10-06 1977-12-27 Aluminum Company Of America Metal flake production
DE2811899A1 (de) * 1978-03-18 1979-09-27 Fryma Masch Ag Spalt-kugelmuehle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US281511A (en) * 1883-07-17 William h
US2398989A (en) * 1943-09-01 1946-04-23 Allis Chalmers Mfg Co Air swept ball mill system
US2595117A (en) * 1950-03-08 1952-04-29 Smidth & Co As F L Method and apparatus for grinding
DE1482391B1 (de) * 1964-06-20 1970-08-20 Draiswerke Gmbh Ruehrwerksmuehle
US4225092A (en) * 1977-11-22 1980-09-30 Microprocess Ltd. Annular grinding mill
SE421752B (sv) * 1978-05-02 1982-02-01 Broman John S Forfarande och kvarn for klasserande-separerande vatmalning av bergarter o dylikt
JPS5814823B2 (ja) * 1979-01-19 1983-03-22 川崎重工業株式会社 渦流式微粉砕機
DE2921408A1 (de) * 1979-05-26 1980-11-27 Draiswerke Gmbh Verfahren zum entlueften von viskosem mahlgut, verwendung einer ruehrwerksmuehle zur durchfuehrung des verfahrens und ruehrwerksmuehle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184188B (de) * 1961-06-21 1964-12-23 Draiswerke Gmbh Ruehrwerksmuehle zur Herstellung von Feststoffdispersionen
FR1343058A (fr) * 1961-10-27 1963-11-15 Nisso Seiko Kabushiki Kaisha Procédé et appareil de broyage
DE1507504A1 (de) * 1966-04-05 1969-07-31 Draiswerke Gmbh Ruehrwerkmuehle
US4065060A (en) * 1976-10-06 1977-12-27 Aluminum Company Of America Metal flake production
DE2811899A1 (de) * 1978-03-18 1979-09-27 Fryma Masch Ag Spalt-kugelmuehle

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009212A1 (fr) * 1987-05-18 1988-12-01 Draiswerke Gmbh Melangeur-broyeur
AU616412B2 (en) * 1987-05-18 1991-10-31 Buhler Gmbh Stirring mill
US5062577A (en) * 1987-05-18 1991-11-05 Draiswerke Gmbh Agitator mill
EP0312932A2 (fr) * 1987-10-20 1989-04-26 Tioxide Specialties Limited Procédé de broyage
EP0312932A3 (en) * 1987-10-20 1989-09-27 Ici Australia Operations Proprietary Limited Grinding process
US5033682A (en) * 1987-10-20 1991-07-23 Ici Australia Operations Propreitary Limited Grinding process
EP0322623A2 (fr) * 1987-12-28 1989-07-05 Inoue Seisakusho (Mfg) Co., Ltd. Appareil de dispersion et de broyage
EP0322623A3 (en) * 1987-12-28 1990-05-23 Inoue Seisakusho (Mfg) Co., Ltd. Dispersing and grinding apparatus
EP0483808A1 (fr) * 1990-10-31 1992-05-06 Matsushita Electric Industrial Co., Ltd. Broyeur agitateur et procédé de broyage
US5320284A (en) * 1990-10-31 1994-06-14 Matsushita Electric Industrial Co., Ltd. Agitating mill and method for milling
DE4432200C1 (de) * 1994-09-09 1996-02-29 Evv Vermoegensverwaltungs Gmbh Rührwerksmühle
EP0700723A1 (fr) 1994-09-09 1996-03-13 EVV-Vermögensverwaltungs-GmbH Broyeur agitateur
EP0700721A1 (fr) 1994-09-09 1996-03-13 EVV-Vermögensverwaltungs-GmbH Broyeur agitateur
EP0700722A1 (fr) 1994-09-09 1996-03-13 EVV-Vermögensverwaltungs-GmbH Broyeur agitateur
EP0982074A1 (fr) 1998-08-28 2000-03-01 DRAISWERKE GmbH Broyeur agitateur
DE19839210B4 (de) * 1998-08-28 2007-09-06 BüHLER GMBH Rührwerksmühle

Also Published As

Publication number Publication date
DK70782A (da) 1982-08-20
US4496106A (en) 1985-01-29
EP0058886A3 (en) 1984-05-30
DK154475C (da) 1989-05-22
JPS57147449A (en) 1982-09-11
DE3106062A1 (de) 1982-09-09
DE3270933D1 (en) 1986-06-12
DK154475B (da) 1988-11-21
EP0058886B1 (fr) 1986-05-07
JPH0260380B2 (fr) 1990-12-17

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