EP3536406A1 - Rührwerksmühle - Google Patents

Rührwerksmühle Download PDF

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Publication number
EP3536406A1
EP3536406A1 EP18160427.3A EP18160427A EP3536406A1 EP 3536406 A1 EP3536406 A1 EP 3536406A1 EP 18160427 A EP18160427 A EP 18160427A EP 3536406 A1 EP3536406 A1 EP 3536406A1
Authority
EP
European Patent Office
Prior art keywords
rotor
grinding
agitator mill
diameter
tools
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.)
Pending
Application number
EP18160427.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Eduard Nater
Andreas Rieche
Norbert Kern
Achim Sturm
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
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Priority to EP18160427.3A priority Critical patent/EP3536406A1/de
Priority to RU2020128089A priority patent/RU2754588C1/ru
Priority to US16/978,236 priority patent/US20200406267A1/en
Priority to JP2020546399A priority patent/JP7146930B2/ja
Priority to CN201980016249.2A priority patent/CN111801165A/zh
Priority to PCT/EP2019/055428 priority patent/WO2019170663A1/de
Publication of EP3536406A1 publication Critical patent/EP3536406A1/de
Pending 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
    • 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
    • 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
    • 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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/1835—Discharging devices combined with sorting or separating of material
    • B02C17/184—Discharging devices combined with sorting or separating of material with separator arranged in discharge path of crushing zone
    • 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
    • B02C2017/165—Mills in which a fixed container houses stirring means tumbling the charge with stirring means comprising more than one agitator

Definitions

  • the invention relates to a stirred mill according to the preamble of claim 1.
  • the invention makes reference to the European patent specification EP 1 992 412 A1 , From this, such a stirred mill is known.
  • Agitator mills are used to disperse suspensions, ie solids in liquids. This is used, for example, in the production of adhesives, printing inks, cosmetics or pharmaceuticals.
  • the millbase is fed via a feed channel into a grinding chamber of the stirred mill, which is formed between the outer wall of a rotor and a container wall, and comminuted together with Mahltosêtn, such as ceramic balls, which are also referred to as a grinding media, and with the aid of tools which are arranged on the rotor and / or on the container wall.
  • the stirring agglomerates are dispersed and crushed crystal structures.
  • the original particle size of 100-500 microns can be reduced to less than 3 microns.
  • the grinding media should be possible only in the grinding space between the rotor and the container wall.
  • the grinding media are accelerated and concentrated outwardly by the tools mounted on the rotor and extending to the vicinity of the vessel wall and by the centrifugal forces created. If tools are arranged on the container wall, they extend in the direction of the rotor.
  • the optionally arranged on the container wall tools are preferably arranged offset from the tools mounted on the rotor, so that they can pass through during the rotation of the rotor between the arranged on the container wall tools.
  • the millbase flows through this dense grinding media packing in the direction of the rotor axis.
  • the invention has for its object to avoid the flooding of grinding media on the MahlSystemtrenn adopted due to drag forces and consequent blockage of the separator.
  • the essence of the invention is to effectively prevent accumulation of grinding media on the separator by reducing the distance between rotor and separator.
  • This can be achieved by increasing the diameter of the separating device, ie in particular the sieve diameter.
  • the distance between the rotor and separator can be selected depending on the diameter of the grinding media, rather than exclusively depending on the size of the agitator mill.
  • a maximum value which is independent of the size of the grinding media, can be set for the distance.
  • the object is achieved by an agitator mill having the following features.
  • the agitator mill has a grinding container and a grinding chamber which is delimited by a container wall, and an agitator rotatable about the central longitudinal axis a rotor with an inner diameter d351.
  • On the rotor tools are mounted, which extend in the direction of the container wall.
  • second tools can be arranged on the container wall, which extend in the direction of the rotor.
  • the agitator mill further includes an inner stator disposed within the rotor. Between the rotor and an outer wall of the inner stator, a Mahlgutabrioskanal is formed, through which the ground material is passed to the separator and then to a drain line.
  • the grinding chamber is at least partially filled with grinding media of diameter c.
  • the tools mounted on the rotor leave only a small gap to the container wall 9, wherein the gap has a gap width b, for which applies in relation to the diameter c of the grinding media: 4c ⁇ b ⁇ 6c, where the minimum gap width b is: 1 , 0 mm ⁇ b ⁇ 2.0 mm.
  • stripping tools At the inner stator extending to the rotor stripping tools can be arranged. These stripping tools, if present, preferably overlap one another in the direction of the central longitudinal axis and are arranged on the inner stator such that they exert a pulse directed in the direction of flow on the grinding media when the rotor is driven.
  • a gap is preferably formed whose gap width e in relation to the diameter c of the grinding bodies is: 4c ⁇ e ⁇ 6c, where the following applies for a minimum gap width e: 1.0 mm ⁇ c ⁇ 2, 0 mm.
  • grinding element return channels for returning the grinding elements from the region of the separating device to the grinding chamber are formed in the agitator.
  • c of the grinding media preferably c ⁇ 0.65 mm and preferably 0.02 mm ⁇ c ⁇ 0.3 mm.
  • FIG. 2 a detail of an agitator mill according to an embodiment of the invention as a vertical longitudinal section
  • agitator mill has in the usual way a grinding container 2 with an internal grinding chamber 8.
  • the grinding chamber 8 is at least partially filled with grinding bodies 43 (not shown) with a diameter c.
  • the agitator mill further comprises an inner stator 22 and a rotor 35 rotatable about a central longitudinal axis 19 with a diameter d351.
  • a regrind discharge channel 47 is formed between an outer wall 23 of the stator 22 and the rotor 35.
  • tools 38 are mounted, which protrude into the grinding chamber 8.
  • 9 second tools 74, offset from the attached to the rotor 35 tools are arranged on the container wall.
  • a protective sieve 30 which is rotationally symmetrical to the central longitudinal axis 19 is formed.
  • the protective screen 30 prevents the flow of grinding media 43 in a downstream drain line 31, which is located within the inner stator 22.
  • a distance s is formed between protective sieve 30 and rotor 35.
  • the distance s between protective sieve 30 and rotor 35 has also been selected to be correspondingly greater.
  • this does not lead to a proportional increase in the product flow. Rather, the product flow falls short of expectations.
  • the distance s between the protective screen 30 and rotor 35 is reduced.
  • the distance s can be selected independently of the design of the agitator mill depending on the diameter c of the grinding media. This leads to a higher permeability of the agitator mill, since the risk of alluvium being flooded 43 drops to the protective screen 30 and thereby to a faster reduction of the coarse grain in the product to be dispersed.
  • the distance s between the protective sieve 30 and the rotor 35 is dependent on the grinding body diameter c s ⁇ 5th c or. 0 . 5 ⁇ d 351 - d 30 ⁇ 5 ⁇ c ,
  • the distance s depends on the grinding body diameter c s ⁇ 3 ⁇ c ,
  • the distance s regardless of the size of the grinding media, is no greater than 2 mm.
EP18160427.3A 2018-03-07 2018-03-07 Rührwerksmühle Pending EP3536406A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18160427.3A EP3536406A1 (de) 2018-03-07 2018-03-07 Rührwerksmühle
RU2020128089A RU2754588C1 (ru) 2018-03-07 2019-03-05 Бисерная мельница
US16/978,236 US20200406267A1 (en) 2018-03-07 2019-03-05 Stirrer mill
JP2020546399A JP7146930B2 (ja) 2018-03-07 2019-03-05 アジテータミル
CN201980016249.2A CN111801165A (zh) 2018-03-07 2019-03-05 搅拌磨
PCT/EP2019/055428 WO2019170663A1 (de) 2018-03-07 2019-03-05 Rührwerksmühle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18160427.3A EP3536406A1 (de) 2018-03-07 2018-03-07 Rührwerksmühle

Publications (1)

Publication Number Publication Date
EP3536406A1 true EP3536406A1 (de) 2019-09-11

Family

ID=61581102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18160427.3A Pending EP3536406A1 (de) 2018-03-07 2018-03-07 Rührwerksmühle

Country Status (6)

Country Link
US (1) US20200406267A1 (ru)
EP (1) EP3536406A1 (ru)
JP (1) JP7146930B2 (ru)
CN (1) CN111801165A (ru)
RU (1) RU2754588C1 (ru)
WO (1) WO2019170663A1 (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021191430A1 (de) 2020-03-27 2021-09-30 Bühler AG Rührwerkskugelmühle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146852A1 (de) * 1983-12-16 1985-07-03 Gebrüder Netzsch Maschinenfabrik GmbH & Co Rührwerksmühle
DE4029139A1 (de) * 1990-09-13 1992-03-19 Netzsch Erich Holding Ruehrwerksmuehle
EP0504836A1 (de) * 1991-03-21 1992-09-23 Erich Netzsch GmbH & Co. Holding KG Rührwerksmühle
EP1992412A1 (de) 2005-10-11 2008-11-19 Bühler Ag Rührwerksmühle
DE102010053484A1 (de) * 2010-12-04 2012-06-06 Netzsch-Feinmahltechnik Gmbh Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790105A (fr) * 1971-10-14 1973-02-01 Netzsch Maschinenfabrik Broyeur-agitateur
SU1366208A1 (ru) * 1986-01-27 1988-01-15 Предприятие П/Я А-3917 Бисерна мельница
US5524830A (en) * 1992-09-11 1996-06-11 Toyo Ink Manufacturing Co., Ltd. Continuous dispersing apparatus
JP2575498Y2 (ja) * 1993-01-08 1998-06-25 三井鉱山株式会社 粉砕機の構造
US5333804A (en) * 1993-08-20 1994-08-02 Premier Mill Corp. Agitator mill
RU2065331C1 (ru) * 1994-08-11 1996-08-20 Акционерная промышленно-коммерческая компания "Новисо" Сепаратор для мелющих тел в бисерной мельнице, предназначенной для помола продуктов, диспергированных в жидкости
DE19632757A1 (de) * 1996-08-14 1998-02-19 Draiswerke Gmbh Rührwerksmühle
DE19638354A1 (de) * 1996-09-19 1998-03-26 Draiswerke Inc Mahwah Rührwerksmühle
JP4013211B2 (ja) * 1998-03-03 2007-11-28 株式会社井上製作所 媒体分散装置
DE19819967B4 (de) * 1998-05-05 2007-04-26 BüHLER GMBH Rührwerksmühle
US6010085A (en) * 1999-03-17 2000-01-04 Kerr Corporation Agitator mill and method of use for low contamination grinding
JP4081785B2 (ja) * 1999-07-29 2008-04-30 株式会社井上製作所 浸漬型分散機
DE10011579B4 (de) * 2000-03-09 2007-06-06 BüHLER GMBH Rührwerksmühle
JP4451965B2 (ja) * 2000-05-18 2010-04-14 株式会社井上製作所 パイプラインビ−ズミル
US20080191072A1 (en) * 2005-04-25 2008-08-14 Gisbert Schall Multi-Stage Agitator Mill
CN101884947B (zh) * 2005-10-11 2011-07-20 比勒股份公司 搅拌式研磨机
EP2327480A1 (de) * 2009-11-25 2011-06-01 Willy A. Bachofen AG Rührwerkskugelmühle
CN102085495A (zh) * 2009-12-05 2011-06-08 昆山密友粉碎设备有限公司 高性能砂磨机
CN108698000B (zh) 2016-02-17 2020-07-14 布勒股份公司 用于混合尤其是分散的装置和方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146852A1 (de) * 1983-12-16 1985-07-03 Gebrüder Netzsch Maschinenfabrik GmbH & Co Rührwerksmühle
DE4029139A1 (de) * 1990-09-13 1992-03-19 Netzsch Erich Holding Ruehrwerksmuehle
EP0504836A1 (de) * 1991-03-21 1992-09-23 Erich Netzsch GmbH & Co. Holding KG Rührwerksmühle
EP1992412A1 (de) 2005-10-11 2008-11-19 Bühler Ag Rührwerksmühle
DE102010053484A1 (de) * 2010-12-04 2012-06-06 Netzsch-Feinmahltechnik Gmbh Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle

Also Published As

Publication number Publication date
RU2754588C1 (ru) 2021-09-03
WO2019170663A1 (de) 2019-09-12
US20200406267A1 (en) 2020-12-31
JP7146930B2 (ja) 2022-10-04
CN111801165A (zh) 2020-10-20
JP2021515694A (ja) 2021-06-24

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