EP0448100A1 - Broyeur-mélangeur - Google Patents

Broyeur-mélangeur Download PDF

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Publication number
EP0448100A1
EP0448100A1 EP91104441A EP91104441A EP0448100A1 EP 0448100 A1 EP0448100 A1 EP 0448100A1 EP 91104441 A EP91104441 A EP 91104441A EP 91104441 A EP91104441 A EP 91104441A EP 0448100 A1 EP0448100 A1 EP 0448100A1
Authority
EP
European Patent Office
Prior art keywords
grinding
cavity
separating device
shaft end
deflection device
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
EP91104441A
Other languages
German (de)
English (en)
Other versions
EP0448100B1 (fr
Inventor
Klaus Dipl.-Ing. Ott (Fh)
Horst Pausch
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.)
Erich Netzsch GmbH and Co Holding KG
Original Assignee
Erich Netzsch GmbH and Co Holding KG
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 Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Publication of EP0448100A1 publication Critical patent/EP0448100A1/fr
Application granted granted Critical
Publication of EP0448100B1 publication Critical patent/EP0448100B1/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

Definitions

  • the invention relates to an agitator mill according to the preamble of patent claim 1.
  • an agitator shaft is overhung in a horizontally arranged grinding container and has an open space at its free end. All around the cavity, the agitator shaft has several recesses through which grinding media, which have flowed axially into the cavity, get back into the grinding chamber.
  • the regrind on the other hand, penetrates a sieve arranged in the cavity, flows to the regrind outlet and is removed.
  • at least one conveying element is formed on the agitator shaft, which is, for example, helical and favors an axial flow of grinding media and grinding material from the inner shaft end through the cavity to the recesses. A large number of the grinding media sweeps over the sieve surface, which can lead to premature wear on the sieve surface.
  • the object of the invention is to reduce the wear caused by grinding elements on the separating device in agitator mills.
  • a deflector is provided which is placed in front of the separating device in the direction of flow, as a result of which the grinding media are fed through the cutouts into the grinding chamber without first coming into contact with the separating device.
  • the deflector has an outer circumferential surface which is concave in axial section, the rise of which guides the grinding media directly in the direction of the cutouts. If a mill often has to be changed over to other operating modes, it is advantageous to arrange the deflector so that it can be adjusted axially, because this allows the flow between the separating device and the agitator shaft to be adjusted. Further advantageous developments of the invention can be found in the subclaims.
  • a grinding chamber 12 is formed between a grinding container 10 and a stirring shaft 11.
  • the stirrer shaft 11 rotates therein, for example, according to FIG. 1, has eccentrically arranged stirring disks 13 and processes flowable regrind 15 with the aid of grinding bodies 14.
  • a cavity 16 which is open at the end and which contains a separating device 17 is formed in the end region of the agitator shaft 11. In all the examples shown, this has one or more screens, but can also be a ring arrangement with separating gaps.
  • the stirrer shaft 11 has axially parallel recesses 18 at its hollow end, which are open towards the free end 19 of the stirrer shaft 11 or, as shown, can be delimited by a continuous ring.
  • the separating device 17 is connected to a regrind outlet 20.
  • the grinding media 14 are conveyed out of the cavity 16 through the recesses 18 back into the grinding chamber 12, which creates a constant cycle.
  • severe wear can occur on the separating device 17 with certain grinding material viscosities and when using grinding media with certain diameters.
  • the separating device 17 is protected by a deflection device 21.
  • the deflection device 21 is a rotationally symmetrical tubular body which is fastened to a cover 22 of the grinding container 10 and forms a unit with the grinding material outlet 20.
  • the deflection device 21 plunges into the cavity 16; the immersion depth can be adjusted to the grinding conditions by axially adjusting the deflection device 21 as a whole or by moving at least a part thereof. 1, the deflection device 21 extends over almost a quarter of the length of the cavity 16.
  • the deflection device 21 has a concave outer surface according to FIG. 1, which connects tangentially, without discontinuity, to the cover 22 and in a radially projecting annular shape Deflector 23 ends.
  • the deflection device 21 is at the inner end 19 of the agitator shaft 11 attached.
  • the effect of the deflection device 21 is dependent not only on its design, as in FIG. 1, but also on the speed of the agitator shaft 11.
  • the deflection device 21 is a combination of a cylindrical guide part 24, a deflector 23, with which the grinding media in particular are deflected radially outwards in the direction of the grinding chamber 12, and inclined or helical conveying channels 25 or vanes, which act as conveying members Act.
  • FIG. 3 to 7 show differently designed separating devices 17 in the form of sieves and associated designs of the deflection device 21.
  • the design shown in FIG. 3 above and in FIG. 5 is an example of a separating device 17 which is arranged in the cavity 16 by several axially parallel circular cylindrical sieves is formed.
  • the deflection device 21 consists of three shells of semicircular cross section, which consist, for example, of wear-resistant sheet metal or ceramic material, are fastened to the cover 22 and each closely enclose one of the sieves in its area radially outer with respect to the stirring shaft 11, facing the recesses 18, and extend continuously or in several sections over the entire length of the screen in question.
  • a separating device 17 which, according to the left part of FIG. 3 and FIG. 6, is formed by a plurality of sieves of oval cross section.
  • the deflection device 21 consists of several strips of wedge-shaped cross section, which in turn are attached to the cover 22 and are axially parallel to the agitator shaft 11 or helically along that of a cylindrical Screening device 17 formed extend.
  • the grinding media 14 are rejected in the direction of the recesses 18 from the grinding stock / grinding media flow prevailing in the cavity 16 from the elongated inclined surfaces of the strips forming the deflection device 21.
  • FIG. 3 An example of an embodiment of the separating device 17 as a sieve which is approximately triangular in cross section can be seen in FIG. 3. At its rounded corners, the sieve is covered by a shell of the deflection device 21, which in turn is made of wear-resistant material and in this case has a third-circular cross-section.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP91104441A 1990-03-21 1991-03-21 Broyeur-mélangeur Expired - Lifetime EP0448100B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009092 1990-03-21
DE4009092A DE4009092C1 (fr) 1990-03-21 1990-03-21

Publications (2)

Publication Number Publication Date
EP0448100A1 true EP0448100A1 (fr) 1991-09-25
EP0448100B1 EP0448100B1 (fr) 1993-09-15

Family

ID=6402747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104441A Expired - Lifetime EP0448100B1 (fr) 1990-03-21 1991-03-21 Broyeur-mélangeur

Country Status (2)

Country Link
EP (1) EP0448100B1 (fr)
DE (2) DE4009092C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007042059A1 (fr) * 2005-10-11 2007-04-19 Bühler AG Broyeur melangeur
EP2246113A1 (fr) 2009-04-29 2010-11-03 Sandvik Intellectual Property AB Processus pour le broyage de cermet ou mélanges de carbure cimenté
CN103418485A (zh) * 2013-04-27 2013-12-04 占天义 研磨分离器
WO2014187824A1 (fr) 2013-05-21 2014-11-27 Flsmidth A/S Procédés et appareil de surveillance en continu de l'usure dans des circuits de meulage
CN112969537A (zh) * 2018-11-09 2021-06-15 布勒股份公司 环缝磨

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH700446A1 (de) * 2009-02-24 2010-08-31 Bachofen Willy A Ag Rührwerkskugelmühle.
DE102014117188B3 (de) * 2014-11-24 2016-05-12 Netzsch-Feinmahltechnik Gmbh Verfahren zum Regulieren der Förderleistung eines Rotors einer Trenneinrichtung einer Rührwerkskugelmühle und Rührwerkskugelmühle zum Zerkleinern von Mahlgut
DE102022134099A1 (de) * 2022-12-20 2024-06-20 Netzsch-Feinmahltechnik Gmbh Rührwerksmühle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002286A1 (fr) * 1984-10-16 1986-04-24 Basf Lacke + Farben Aktiengesellschaft Procede de dispersion, et machine pour sa mise en oeuvre
EP0206207A2 (fr) * 1985-06-18 1986-12-30 Erich Netzsch GmbH & Co. Holding KG Broyeur agitateur
EP0249879A2 (fr) * 1986-06-20 1987-12-23 Inoue Seisakusho (Mfg) Co., Ltd. Appareil de dispersion et de broyage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653600A (en) * 1969-07-28 1972-04-04 George R Schold Apparatus for dispersing finely divided solid particles in a liquid vehicle
DE3345680A1 (de) * 1983-12-16 1985-06-20 Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb Ruehrwerksmuehle
DE3536857C2 (de) * 1984-11-16 1994-06-09 Draiswerke Gmbh Geschlossene Rührwerksmühle mit Siebpatronen
DE3716587C1 (de) * 1987-05-18 1988-04-28 Draiswerke Gmbh Ruehrwerksmuehle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002286A1 (fr) * 1984-10-16 1986-04-24 Basf Lacke + Farben Aktiengesellschaft Procede de dispersion, et machine pour sa mise en oeuvre
EP0206207A2 (fr) * 1985-06-18 1986-12-30 Erich Netzsch GmbH & Co. Holding KG Broyeur agitateur
EP0249879A2 (fr) * 1986-06-20 1987-12-23 Inoue Seisakusho (Mfg) Co., Ltd. Appareil de dispersion et de broyage

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007042059A1 (fr) * 2005-10-11 2007-04-19 Bühler AG Broyeur melangeur
EP1992412A1 (fr) * 2005-10-11 2008-11-19 Bühler Ag Moulin mélangeur agitateur
US7931222B2 (en) 2005-10-11 2011-04-26 Bühler AG Agitator mill
EP2246113A1 (fr) 2009-04-29 2010-11-03 Sandvik Intellectual Property AB Processus pour le broyage de cermet ou mélanges de carbure cimenté
CN102421528A (zh) * 2009-04-29 2012-04-18 山特维克知识产权股份有限公司 研磨金属陶瓷或硬质合金粉末混合物的方法
CN102421528B (zh) * 2009-04-29 2015-08-12 山特维克知识产权股份有限公司 研磨金属陶瓷或硬质合金粉末混合物的方法
CN103418485A (zh) * 2013-04-27 2013-12-04 占天义 研磨分离器
WO2014187824A1 (fr) 2013-05-21 2014-11-27 Flsmidth A/S Procédés et appareil de surveillance en continu de l'usure dans des circuits de meulage
CN112969537A (zh) * 2018-11-09 2021-06-15 布勒股份公司 环缝磨
CN112969537B (zh) * 2018-11-09 2023-05-09 布勒股份公司 环缝磨

Also Published As

Publication number Publication date
EP0448100B1 (fr) 1993-09-15
DE4009092C1 (fr) 1991-05-23
DE59100372D1 (de) 1993-10-21

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