EP2646160B1 - Dynamisches element für die trenneinrichtung einer rührwerkskugelmühle - Google Patents

Dynamisches element für die trenneinrichtung einer rührwerkskugelmühle Download PDF

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Publication number
EP2646160B1
EP2646160B1 EP11833565.2A EP11833565A EP2646160B1 EP 2646160 B1 EP2646160 B1 EP 2646160B1 EP 11833565 A EP11833565 A EP 11833565A EP 2646160 B1 EP2646160 B1 EP 2646160B1
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EP
European Patent Office
Prior art keywords
dynamic element
ball mill
grinding
agitator
separating unit
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.)
Active
Application number
EP11833565.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2646160A2 (de
Inventor
Horst Pausch
Jan Wolfrum
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.)
Netzsch Feinmahltechnik GmbH
Original Assignee
Netzsch Feinmahltechnik 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 Netzsch Feinmahltechnik GmbH filed Critical Netzsch Feinmahltechnik GmbH
Publication of EP2646160A2 publication Critical patent/EP2646160A2/de
Application granted granted Critical
Publication of EP2646160B1 publication Critical patent/EP2646160B1/de
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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
    • B02C17/18—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
    • 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
    • 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
    • B02C17/163—Stirring means

Definitions

  • the present invention relates to a separation unit with a dynamic element for agitator ball mills.
  • German patent application DE 10 2007 043 670 A1 discloses an agitating ball mill with a cylindrical grinding container, wherein in the grinding container a stirring shaft connected to a drive is arranged.
  • the agitator shaft transmits part of the drive energy to the grinding auxiliary bodies, which are arranged loosely in the grinding container.
  • a spiral separator is arranged before the Mahlgutauslass.
  • the European patent application EP 1 468 739 A1 discloses a horizontal agitating ball mill for continuous grinding of a material which has a cylindrical or conical grinding chamber for receiving grinding bodies. At one end of the grinding chamber an opening into the interior of the grinding chamber Gut inlet is arranged. At the other end of the grinding chamber, a good outlet leading out of the interior is placed. Furthermore, a plurality of stirring elements exhibiting and coaxial with the chamber axis agitator is present. In front of the good outlet is a separately driven separation system that separates the grinding media from the milled material and conveys it back into the interior of the grinding chamber.
  • the separation system is formed from a separating member having two coaxial with the chamber axis arranged circular discs.
  • the wing elements Between the circular discs several, symmetrically distributed around the disk center point, as well as from the disk edge inwardly leading conveyor or wing elements are arranged.
  • the wing elements generate a counterpressure on the good-media mixture, so that due to the centrifugal force and the different specific gravity, the grinding media separated from the product and transported back into the interior.
  • the European patent EP 0 627 262 B1 discloses a fine and fine grinding of a good serving continuous agitator ball mill.
  • This agitator ball mill is equipped with a cylindrical or conical, for Provided recording of Mahl stresses serving grinding chamber. At one end of the grinding chamber a Mahlguteinlass is arranged, which opens into the interior of the grinding chamber. At the other end of the grinding chamber a Mahlgutauslass is arranged, which leads out of the interior.
  • the agitator ball mill stirrers and an agitator moving coaxially to the grinding chamber axis for moving the grinding media, wherein the stirring members are formed schaufelrad- or propeller-like and having a plurality of conveying elements.
  • a circular disc is arranged in each case, wherein at least one of the two discs has at least one central opening.
  • the stirrers are configured and dimensioned such that, during operation of the agitator ball mill, a portion of the mixture continuously flows back over the edge of the disk having the central opening to the central opening. From there, the mixture flows back into the space between the discs. As a result, a uniform axial distribution of the grinding media in the interior of the grinding chamber is maintained.
  • the publication EP 0 260 604 A2 discloses a separator for a stirred ball mill.
  • the separator leaves treated regrind out of the grinding chamber via the Mahlgutauslass, while the grinding media are retained in the grinding chamber.
  • the separating device has the shape of a sieve, but may also be designed as an annular gap arrangement.
  • the invention has for its object to provide a separation unit, with which the discharge of Mahlos stressesn from a stirred ball mill is avoidable.
  • a further object of the invention is to provide a method with which the discharge of auxiliary grinding bodies from a stirred ball mill can be avoided.
  • the grinding container has at least one Mahlguteinlass and at least one Mahlgutauslass.
  • the grinding container is connected to a drive Stirring shaft arranged.
  • the stirrer shaft transmits part of the drive energy of the drive to the grinding aid bodies.
  • Mahlosterrorism are loosely distributed in the grinding container.
  • the agitator ball mill has a separation unit associated with the Mahlgutauslass, wherein the separation unit is disposed about an axis of rotation and / or rotated about this axis of rotation.
  • the separation unit consists of at least two components, of which one component is at least one separation device and a second component is a dynamic element for generating a material flow.
  • the dynamic element is provided with radially extending channels or wings.
  • the dynamic element is arranged between the separator of the separation unit and an end portion of the grinding container.
  • the dynamic element has a contact side to the separating device, a central bore and a conical active surface with openings. Channels are formed between the central bore and the openings of the conical active surface. Ground material is sucked out of the separating device via the central bore and directed via the channels to the openings on the active surface and thus out of the dynamic element. In particular, the material to be ground is discharged radially outward via the channels and exits the dynamic element via the openings of the conically shaped active surface. Furthermore, the dynamic element is characterized in that the cross section of the dynamic element decreases in the direction of the end portion of the grinding container. The dynamic element of the separating unit is arranged at a distance from an end portion of the grinding container.
  • the distance between the dynamic element and the end part is adjustable from 0.5 mm to 30 mm. In a preferred embodiment, the distance between 2 mm and 15 mm is variable. Furthermore, the distance in the preferred embodiment is axially adjustable to the stirring shaft. The adjustment of the distance is used to adapt to different sized Mahltospian.
  • the surface of the dynamic element and the end part of the grinding container are arranged conically with each other.
  • the angle between the axis of rotation and the surface of the element or between the axis of rotation and the end part is designed in the range of 5 ° to 85 °. In a preferred embodiment, the angle has a value of 15 ° to 80 °.
  • the value for the ratio of the length of the separation unit to the stirring wavelength is in the range between 1: 1.1 and 1: 2. Depending on how the separation unit is configured, the value for the ratio can also be in the range between 1: 1.3 and 1: 1.7.
  • the agitator shaft of the agitator ball mill is provided with a cage.
  • a part of the stirring shaft encloses the separation unit. This part is called a cage.
  • the ratio of the outer diameter of the separation unit to the inner diameter of the cage is in a value range of 1: 1.05 to 1: 2.
  • the ratio of the outer diameter of the separation unit to the outer diameter of the end portion of the grinding container for the function of the separation unit is important. This ratio is in a range between 1: 1 and 1: 1.2.
  • the separator and the dynamic element may be coupled together.
  • the separator and the dynamic element may be arranged independently within the separation unit.
  • the separating device and / or the dynamic element are coupled to the stirring shaft and can be driven by the latter.
  • the separating device and / or the dynamic element are decoupled from the agitator shaft and each have their own drive.
  • the drive of the cage or of the separation unit enclosing part of the stirring shaft via the stirring shaft. Furthermore, a separate drive for generating the rotational movement of the separator may be provided. For the design of the separator different embodiments are possible.
  • the separator may be a sieve, a sieve cartridge or a spiral. Many separating devices for stirred ball mills are known from the prior art. These known separation devices can also be combined with the dynamic element according to the invention.
  • a separation unit which consists of at least two components, wherein at least one separating device is combined with at least one dynamic element.
  • the dynamic element is disposed between the separation unit and an end portion of the grinding container.
  • a material flow is generated within the separation unit, so that between the output of the separation unit and its input within the grinding container, a material circulation takes place.
  • the dynamic element generates a flow of material between the outlet and the inlet of the separator and thereby material circulation. Due to the circulation of material, it is no longer possible for auxiliary grinding bodies to form into a gap formed by a spacing between the dynamic element and the end part of the grinding container can enter.
  • the dynamic element creates a flow between the outlet and the inlet of the separation unit.
  • the separating device and the dynamic element are driven together and / or independently of each other, as well as coupled to the stirring shaft or decoupled from this.
  • the pressure generated by the circulation flow is higher in the transition area to the cage than at the end of the separation unit.
  • the rotational movement of the dynamic element produces a material flow which is directed radially from the axis of rotation to the agitator shaft.
  • FIGS. 5 and 6 schematically show possible embodiments of the dynamic element.
  • Fig. 1 shows the schematic structure of a stirred ball mill 20 according to the invention with a separation unit 30.
  • the illustrated agitator ball mill 20 consists of a grinding container 22, which is provided with a Mahlguteinlass 24 and a Mahlgutauslass 26.
  • a stirring shaft 28 is arranged centrally.
  • the separation unit 30 is arranged.
  • the part of the stirring shaft 28 which encloses the separation unit 30 is referred to as cage 44.
  • This cage 44 may have axial recesses 45 or the like so that, for example, auxiliary grinding bodies can pass back into the grinding container 22 through these axial recesses 45.
  • the separator 31 is configured spirally.
  • the separator 31 is associated with a dynamic element 32 for generating a flow of material.
  • the dynamic element 32 is positioned at a distance a from the end portion 27 of the grinding container 22.
  • the gap 42 defined as the distance a, the material to be ground can flow between the dynamic element 32 and the end part 27.
  • the material flow is generated by a rotational movement of the element 32 about the axis of rotation 29 around.
  • Fig. 2 shows the schematic structure of a stirred ball mill 20 according to the invention, wherein the separator 31 is a sieve or a screen cartridge.
  • the separator 31 is coupled to a dynamic element 32 for generating a flow of material.
  • FIG. 3a and 3b show the length and diameter ratios of different separation unit configurations.
  • An agitating ball mill 20 with a long separator 31 is shown.
  • the FIG. 3b on the other hand, an agitator ball mill 20 with a short separating device 31 is shown.
  • the separation unit 30 When in the Fig. 3a shown agitator ball mill 20, the separation unit 30 is surrounded by the stirring shaft 28.
  • the separator 31 of length I ' joins the dynamic element 32 of length I ".
  • the stirring shaft 28 is significantly longer in length L than the separator unit 30 of length I.
  • the gap width 42 is determined by the distance a, which can be adjusted depending on the configuration of the agitator ball mill 20 and the size of the grinding aid bodies (not shown)
  • the dynamic element 32 and the end part 27 are arranged not only at a defined distance a but also at a certain angle w relative to each other
  • the inner diameter D of the agitator shaft 28 is minimally larger than the outer diameter d of the separation unit 30
  • the Fig. 3b is up to the length of the separation unit 30 and its various components with the FIG. 3a identical.
  • the length I of the separation unit 30 is composed of the length I 'of the separator 31 and of the length I "of the dynamic element 32 FIG. 3b
  • the length L of the agitator shaft 28 is less than the length I of the separation unit 30.
  • the end part 27 is only slightly superimposed by the agitator shaft 28.
  • Fig. 4 shows the schematic structure of a dynamic element 32 for generating a flow of material.
  • the element 32 is constructed such that it is rotationally symmetrical about the axis of rotation 29.
  • the contact side 36 of the element 32 is in the installed state with a separator (not shown) in operative connection.
  • Ground material is sucked out of the separating device via a central bore 33 and discharged radially outward via the channels 34, again in the flow direction 37.
  • Through the openings 39 on the active surface 38 of the element 32 of the Mahlgutstrom can emerge from the element 32.
  • the conical design of the active surface 38 of the element 32 can be seen.
  • the cross section of the element decreases towards the end part (not shown).
  • FIGS. 5 and 6 schematically show possible embodiments of the dynamic element 32.
  • Die Fig. 5 shows a dynamic element 32 in a frontal view.
  • the channels 34 for generating a flow of material extend in an arcuate line from the central bore 33 to the outside to the active surface 38 of the element 32nd
  • FIG. 6 another embodiment of a dynamic element 32 is shown.
  • the channels 34 extend from the central bore 33 radially outwards to the active surface 38.
  • the short channels 35 are concealed in the region of the central bore 33 by the material of the element 32. Due to the conical configuration of the element 32, these short channels 35 only emerge in the vicinity of the contact side (not shown).

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP11833565.2A 2010-12-04 2011-12-01 Dynamisches element für die trenneinrichtung einer rührwerkskugelmühle Active EP2646160B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010053484A DE102010053484A1 (de) 2010-12-04 2010-12-04 Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle
PCT/DE2011/002060 WO2012083915A2 (de) 2010-12-04 2011-12-01 Dynamisches element für die trenneinrichtung einer rührwerkskugelmühle

Publications (2)

Publication Number Publication Date
EP2646160A2 EP2646160A2 (de) 2013-10-09
EP2646160B1 true EP2646160B1 (de) 2016-02-03

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EP11833565.2A Active EP2646160B1 (de) 2010-12-04 2011-12-01 Dynamisches element für die trenneinrichtung einer rührwerkskugelmühle

Country Status (9)

Country Link
US (2) US8794558B2 (ja)
EP (1) EP2646160B1 (ja)
JP (1) JP5875595B2 (ja)
KR (1) KR101769656B1 (ja)
CN (1) CN103298561B (ja)
BR (1) BR112013013770B8 (ja)
DE (1) DE102010053484A1 (ja)
RU (1) RU2555915C2 (ja)
WO (1) WO2012083915A2 (ja)

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EP4032615A1 (de) 2021-01-25 2022-07-27 Wilhelm Niemann GmbH & Co KG Rührwerksmühle

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DE102013021757A1 (de) * 2013-12-20 2015-06-25 Netzsch Trockenmahltechnik Gmbh Maschine mit fliegend gelagertem Rotor
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CN105880001B (zh) * 2016-05-09 2023-07-04 博亿(深圳)工业科技有限公司 搅拌式研磨分离器、研磨分离装置及研磨装置
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Publication number Priority date Publication date Assignee Title
EP4032615A1 (de) 2021-01-25 2022-07-27 Wilhelm Niemann GmbH & Co KG Rührwerksmühle
DE102021101527A1 (de) 2021-01-25 2022-07-28 Wilhelm Niemann Gmbh & Co. Rührwerksmühle
DE102021101527B4 (de) 2021-01-25 2023-05-17 Wilhelm Niemann Gmbh & Co. Rührwerksmühle

Also Published As

Publication number Publication date
RU2013130294A (ru) 2015-01-10
WO2012083915A3 (de) 2012-08-23
KR20130135279A (ko) 2013-12-10
US20130264402A1 (en) 2013-10-10
BR112013013770B8 (pt) 2020-11-24
CN103298561A (zh) 2013-09-11
BR112013013770B1 (pt) 2020-07-14
WO2012083915A4 (de) 2012-10-26
RU2555915C2 (ru) 2015-07-10
US20140048632A1 (en) 2014-02-20
DE102010053484A1 (de) 2012-06-06
US8876028B2 (en) 2014-11-04
EP2646160A2 (de) 2013-10-09
BR112013013770A2 (pt) 2016-09-13
KR101769656B1 (ko) 2017-08-18
WO2012083915A2 (de) 2012-06-28
JP5875595B2 (ja) 2016-03-02
JP2013544187A (ja) 2013-12-12
US8794558B2 (en) 2014-08-05
CN103298561B (zh) 2015-08-26

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