EP2646160A2 - Élément dynamique conçu pour le dispositif de séparation d'un broyeur à boulets - Google Patents

Élément dynamique conçu pour le dispositif de séparation d'un broyeur à boulets

Info

Publication number
EP2646160A2
EP2646160A2 EP11833565.2A EP11833565A EP2646160A2 EP 2646160 A2 EP2646160 A2 EP 2646160A2 EP 11833565 A EP11833565 A EP 11833565A EP 2646160 A2 EP2646160 A2 EP 2646160A2
Authority
EP
European Patent Office
Prior art keywords
separating device
ball mill
dynamic element
agitator ball
grinding container
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
EP11833565.2A
Other languages
German (de)
English (en)
Other versions
EP2646160B1 (fr
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/fr
Application granted granted Critical
Publication of EP2646160B1 publication Critical patent/EP2646160B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B02C17/18—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
    • 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 separator with a dynamic element for agitator ball mills.
  • German Patent Application DE 10 2007 043 670 A1 discloses a stirred ball mill with a cylindrical grinding container, wherein a stirring shaft connected to a drive is arranged in the grinding container.
  • 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.
  • European patent application EP 1 468 739 A1 discloses a continuous agitating ball mill for fine grinding and fine grinding of a material with 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 back pressure on the good-Mahl Sciences-Ge 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.
  • European Patent EP 0 627 262 B1 discloses a continuous agitator ball mill for fine grinding and fine grinding of a material.
  • 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 has stirring elements and an agitator which moves coaxially with respect to the grinding chamber axis for moving the grinding bodies, wherein the stirring elements are formed as paddlewheel or propeller-like and have 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 past the rim of the disk having the central opening, radially inward toward 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 invention has for its object to provide a separation device with which the discharge of Mahlös stresses from a stirred ball mill is avoidable bar.
  • 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 on.
  • the agitator shaft transmits part of the drive energy of the Drive on the Mahltos emotions.
  • Mahltosterrorism are loosely distributed in the grinding container.
  • the agitator ball mill has a separation device associated with the Mahlgutauslass, wherein the separating device is arranged about an axis of rotation and / or rotates about this axis of rotation.
  • the separating device consists of at least two components, of which one component is at least one separating 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 agitator shaft of the agitator ball mill is provided with a cage.
  • the dynamic element of the separator is arranged at a distance from an end portion of the grinding container.
  • the distance between the 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 Mahltoselasticity.
  • 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 separator to the stirring length is in the range between 1: 1, 1 and 1: 2. Depending on how the separating device is designed, the value for the ratio can also be in the range between 1: 1, 3 and 1: 1, 7.
  • the ratio of the outer diameter of the separator 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 separator to the outer diameter of the end portion of the grinding container for the function of the separator is important. This ratio is in a range between 1: 1 and 1: 1, 2.
  • the cage is driven by the stirrer shaft. Furthermore, a separate
  • the separator may be a sieve, a sieve cartridge or a spiral. From the prior art, many separation devices for agitator known ball mills. These known separation devices can also be combined with the dynamic element according to the invention.
  • a method for operating a stirred ball mill with a separating device is disclosed.
  • a separating device is used, which consists of at least two components, wherein at least one separating device is combined with at least one dynamic element for generating a flow of material.
  • the dynamic element creates a flow between the outlet and the inlet of the separator.
  • 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 created by the circulation flow is higher in the transition area to the cage than at the end of the separator.
  • the rotational movement of the dynamic element produces a material flow which is directed radially from the axis of rotation to the agitator shaft.
  • Fig. 1 shows the schematic structure of a stirred ball mill according to the invention with a spiral separator.
  • Fig. 2 shows the schematic structure of a stirred ball mill according to the invention, wherein the main separating device is a screen cartridge.
  • Figures 3a and 3b show the length and diameter ratios of different divider configurations.
  • Fig. 4 shows the schematic structure of a dynamic element.
  • FIGS. 5 and 6 show schematically possible embodiments of the dynamic element.
  • FIG. 1 shows the schematic structure of an agitating ball mill 20 according to the invention with a separating device 30.
  • the agitating ball mill 20 shown consists of a grinding container 22 which is provided with a grinding material inlet 24 and a grinding material outlet 26.
  • a stirring shaft 28 is arranged centrally.
  • the separator 30 is arranged within the stirring shaft 28, the separator 30 is arranged.
  • the part of the stirring shaft 28 which encloses the separating device 30 is referred to as a 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 separating device 31 is designed in a spiral shape.
  • 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 an agitating ball mill 20 according to the invention, wherein the separating device 31, 30 is a sieve 44 or a sieve cartridge 44.
  • the separator 31 is coupled to a dynamic element 32 for generating a flow of material.
  • FIG. 3 a shows the length and diameter ratios of different divider configurations.
  • FIG. 3 a is an agitator ball Mill 20 shown with a long separator 31.
  • FIG. 3b shows an agitating ball mill 20 with a short separating device 31.
  • the separating device 30 is surrounded by the stirring shaft 28.
  • the lengthwise divider 31 joins the lengthwise dynamic element 32.
  • the stirring shaft 28 is significantly longer in length L than the lengthwise divider 30.
  • 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 auxiliary grinding bodies (not shown)
  • the dynamic element 32 it is important that the dynamic element 32 and the Furthermore, it can be seen that the inner diameter D of the agitator shaft 28 is minimally larger than the outer diameter d of the separating device 30.
  • the outer diameter d 'of the end part However, 27 is significantly smaller than the inner diameter D of the stirring shaft 28th
  • FIG. 3b is identical to FIG. 3a except for the length of the separator 30 and its various components.
  • the length I of the separating device 30 is composed of the length I 'of the separating device 31 and of the length I "of the dynamic element 32.
  • the length L of the stirring shaft 28 is less than the length I of Separator 30.
  • the end portion 27 is only slightly superimposed by the agitator shaft 28.
  • FIG. 4 shows the schematic structure of a dynamic element 32 for generating a material flow.
  • 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.
  • the ground material flow can emerge from the element 32.
  • the conical design of the active surface 38 of the element 32 is clear recognizable.
  • the cross section of the element decreases towards the end part (not shown).
  • FIGS. 5 and 6 show schematically possible embodiments of the dynamic element 32.
  • 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 shows a further embodiment of a dynamic element 32.
  • 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).

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un broyeur à boulets comprenant un contenant de broyage. Ce contenant de broyage comprend au moins une entrée de produit à broyer et au moins une sortie de produit broyé. Une tige d'agitation reliée à un entraînement est disposée dans ce contenant de broyage. La tige d'agitation transmet une partie de l'énergie d'entraînement aux corps auxiliaires de broyage. Ces corps auxiliaires de broyage sont répartis de manière lâche dans le contenant de broyage. Le broyeur à boulets comprend également un dispositif de séparation associé à la sortie de produit broyé, ledit dispositif de séparation étant disposé autour d'un axe de rotation et/ou effectue un mouvement de rotation autour de cet axe de rotation. Le dispositif de séparation comprend au moins deux composants, un composant étant au moins un dispositif de séparation et un deuxième composant étant un élément dynamique pour générer un flux de matière.
EP11833565.2A 2010-12-04 2011-12-01 Élément dynamique pour le dispositif de séparation d'un broyeur agitateur à billes Active EP2646160B1 (fr)

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 (fr) 2010-12-04 2011-12-01 Élément dynamique conçu pour le dispositif de séparation d'un broyeur à boulets

Publications (2)

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

Family

ID=45954248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11833565.2A Active EP2646160B1 (fr) 2010-12-04 2011-12-01 Élément dynamique pour le dispositif de séparation d'un broyeur agitateur à billes

Country Status (9)

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

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EP2905080A1 (fr) * 2014-02-07 2015-08-12 Willy A. Bachofen AG Broyeur à billes à agitateur
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CN114247525B (zh) * 2021-12-02 2022-12-20 广西西陇化工有限公司 一种钛白粉生产用研磨设备

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Also Published As

Publication number Publication date
BR112013013770B8 (pt) 2020-11-24
KR101769656B1 (ko) 2017-08-18
US20140048632A1 (en) 2014-02-20
JP2013544187A (ja) 2013-12-12
KR20130135279A (ko) 2013-12-10
US8876028B2 (en) 2014-11-04
CN103298561B (zh) 2015-08-26
WO2012083915A4 (fr) 2012-10-26
RU2555915C2 (ru) 2015-07-10
BR112013013770B1 (pt) 2020-07-14
RU2013130294A (ru) 2015-01-10
JP5875595B2 (ja) 2016-03-02
CN103298561A (zh) 2013-09-11
WO2012083915A2 (fr) 2012-06-28
US20130264402A1 (en) 2013-10-10
WO2012083915A3 (fr) 2012-08-23
BR112013013770A2 (pt) 2016-09-13
US8794558B2 (en) 2014-08-05
DE102010053484A1 (de) 2012-06-06
EP2646160B1 (fr) 2016-02-03

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