EP2632599B1 - Rührwerkskugelmühle - Google Patents

Rührwerkskugelmühle Download PDF

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Publication number
EP2632599B1
EP2632599B1 EP11805377.6A EP11805377A EP2632599B1 EP 2632599 B1 EP2632599 B1 EP 2632599B1 EP 11805377 A EP11805377 A EP 11805377A EP 2632599 B1 EP2632599 B1 EP 2632599B1
Authority
EP
European Patent Office
Prior art keywords
grinding
ball mill
agitator ball
cage
agitator
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
EP11805377.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2632599A2 (de
Inventor
Udo Enderle
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 EP2632599A2 publication Critical patent/EP2632599A2/de
Application granted granted Critical
Publication of EP2632599B1 publication Critical patent/EP2632599B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C17/18—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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • 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
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone

Definitions

  • the present invention relates to a stirred ball mill for preferably grinding dry or non-dry substances.
  • the agitator ball mill according to the invention for grinding dry or dry substances is provided with a grinding container.
  • the grinding container is provided with an inlet for the material to be ground, a fluid inlet and a material outlet, wherein the outlet region is provided with a sieve.
  • a stirrer shaft In the center or in the vicinity of the center of the grinding container runs a stirrer shaft, on which a plurality of grinding elements are arranged.
  • the grinding container is at least partially filled with Mahltosêtn.
  • the inlet region of the agitator ball mill is assigned a first cage and the outlet region is assigned a second cage.
  • the German patent DE 36 42 320 C2 discloses an agitator mill for grinding, in particular for dry milling of pigments, comprising a cylindrical container in which there are grinding bodies and which is provided with an inlet for the material to be ground and an outlet for the ground material.
  • a drivable stirrer is arranged, whose effective surfaces of the inner wall of the container have a smaller distance than the diameter of the grinding media.
  • German Auslegeschrift DE 1 288 890 discloses a method for dry micronizing of solids in a high-speed agitator mill disclosed.
  • the vertically arranged grinding container of the agitator mill is partially filled with grinding media and is traversed by a gas.
  • Mahlgutstrom and also the steadily directly and almost exclusively by the Mahl stresses-Mahlgut-heap directed gas stream are controlled so that the space between the grinding media is filled to 10 to 60% with regrind.
  • the agitator consists of concentric mounted on an agitator shaft flat full discs.
  • German patent DE 1 184 611 B discloses a screening machine with at least one vibratable from the horizontal round screen and a rotatable below the screen surface means for cleaning the screen by means of air jets.
  • This air jet screen cleaning consists of under the screen easily rotatably mounted air ducts, which communicate with a central, acted upon by a fan with air distribution chamber in communication and have air outlet openings. At least a part of these air outlet openings is arranged so that the air guide tubes are displaceable with their support by the recoil of the exiting air in a circulating movement parallel to the screen surface.
  • German patent DE 24 14 686 is a method for screening a pneumatically a screen surface from the top given Siebgut mixture described by pneumatic conveying the fine material through the screen surface.
  • the screen is provided with a pneumatic screen cleaning acting countercurrently to the conveying direction, in the form of a compressed air blowing device which periodically sweeps over the screen surface underside.
  • the frequency and intensity of the cleaning air jets blown from the opposite side through the screen are sufficient in relation to the incident screen flow to prevent the formation of more than monorail thickness.
  • the German utility model DE 20 2008 006 745 U1 relates to a grinding disc with an annular body and with a plurality of cams, wherein the cams are releasably connected to the annular body.
  • the cams are made of a ceramic material, preferably of a yttrium-stabilized zirconia ceramic. Furthermore, the cams are bolted to the annular body, wherein the cams are screwed radially to the annular body.
  • An apparatus according to the preamble of claim 1 is made EP 2 189 221 A2 known.
  • the invention has for its object to provide an agitator ball mill for economical and reliable grinding of dry or non-dry substances to very fine ground material ready.
  • the agitator ball mill according to the invention for grinding dry or non-dry substances consists of a grinding container, at least partially with Mahltos 1968 is filled.
  • the grinding container is provided with an inlet and an outlet for the material or material to be ground and with a fluid inlet.
  • the added air is used as a carrier medium for the transport of the material or the ground material in the stirred ball mill.
  • air other fluids may be used which may be more suitable for the milling tasks.
  • inert gases can be used.
  • a sieve is arranged in the outlet region of the agitator ball mill, to which a discharge device is connected downstream. With this discharge the removal of the ground material, which has passed the sieve, ensured.
  • Centrally in the grinding container runs a stirring shaft on which a plurality of grinding elements are arranged.
  • the inlet region of the agitator ball mill is assigned a first cage and the outlet region is assigned a second cage.
  • a cleaning device is arranged, with which located on the outside of the screen grist can be removed from the screen.
  • the grinding elements which are arranged in the inlet area and in the outlet area, are designed in such a way that they can transport the ground material and the grinding auxiliary bodies into the center of the grinding container.
  • the cleaning device is rotationally movable in the center of the screen. Furthermore, the cleaning device is provided with at least one device for ejecting a cleaning medium. The supply of the cleaning device is ensured by a channel which extends through the agitator shaft.
  • the cleaning medium used may be a gas and / or a vaporous liquid.
  • the choice of cleaning medium depends on the requirements of the material to be ground. When steam is used in dry grinding usually only superheated dry steam. If gas is used, preferably air or an inert gas is used. It has been shown that above all air is very well suited, since no special requirements are placed on the operator and machine for the handling.
  • the addition and / or the addition frequency of the cleaning medium to the cleaning device are freely adjustable.
  • the sieve is installed separately or integrated in a sieve cartridge.
  • At least one, the inlet region associated, first refining element is configured such that it transports the material to be ground and the Mahlosêt in the conveying direction of the agitator ball mill.
  • at least one last grinding element assigned to the outlet region is configured in such a way that it conveys the grinding stock and the auxiliary grinding bodies against the conveying direction of the agitator ball mill.
  • the grinding elements which are assigned to the inlet region and / or the outlet region each have at least one additional element with which the grinding material and meal conveyor transport are ensured.
  • the additional element of the grinding element in the inlet region is inclined in the conveying direction of the agitator ball mill.
  • the additional element of the grinding element in the outlet region is inclined against the conveying direction of the agitator ball mill.
  • the additional elements are detachably connected to the grinding elements. By this releasable connection, it is possible to adjust the inclination of the additional elements relative to the grinding elements according to the requirements of the grinding process.
  • the first cage facing the inlet area has fewer cage webs than the second cage in the outlet area.
  • the cage bars of the second cage are movable at a greater circumferential speed than the cage bars of the first cage.
  • the first cage is located in the area of the inlet and the fluid inlet.
  • the diameter of the second cage is larger than the diameter of the first cage. Due to the lower peripheral speed of the first cage, the material to be milled is registered uniformly in the air stream. Due to the higher peripheral speed of the second cage, the auxiliary grinding bodies are kept almost completely away from the screen surface. Except for different diameters of the first cage and the second cage, these advantages could be realize only via separately driven cages. However, this would mean a much higher mechanical and control engineering effort.
  • Fig. 1 shows the schematic structure of a stirred ball mill according to the invention 10.
  • the agitator ball mill 10 consists in the main of a grinding container 12 and a stirring shaft 26 at the various grinding elements 28, 28a and 28b are arranged.
  • the grinding container 12 consists of a Mahl actuallyerwandung 13 which is provided with an inlet 14, for the material to be ground, a fluid inlet 15 and an outlet 18.
  • air as a carrier medium, is introduced into the agitator ball mill 10 via the fluid inlet 15.
  • cages 38 and 40 are arranged on the agitator shaft 26.
  • the first cage 38 is associated with the inlet region 16 and the second cage 40 with the outlet region 20.
  • the first cage 38 in the inlet region 16 of the agitator ball mill 10, the material to be ground and the carrier air are mixed.
  • the cages 38 and 40 are formed by different cage bars 42.
  • the first cage 38 has fewer cage bars 42 than the second cage 40.
  • the first milling element 28a after the inlet 14 and the last grinding element 40 in front of the outlet 18, are designed differently than the other grinding elements 28.
  • the first grinding element 28a and the second grinding element 28b are each provided with additional elements 36 for influencing the flow of the material to be ground and the Mahlos stresses 30. These additional elements 36 are inclined so that the material to be ground and the auxiliary grinding bodies 30 are guided into the center 34 of the agitator ball mill 10. For this purpose, the material to be ground and the auxiliary grinding bodies 30 are conducted from the inlet region 16 in the conveying direction F and from the outlet region 20 by means of the grinding element 28b against the conveying direction F.
  • a sieve 24 In the outlet region 20 of the stirred ball mill 10 is located within the second cage 40, a sieve 24. This sieve 24 is also used to keep the auxiliary grinding body 30 from the outlet 18 away. In the center of the screen 24, a rotatable cleaning device 31 is arranged, with which the screen 24 can be cleaned by a cleaning medium from the inside out.
  • the agitator ball mill 10 shown is provided with a screw-shaped discharge device 22.
  • Fig. 2 schematically shows the structure of the inlet portion 16 of the agitator ball mill.
  • the material 52 to be ground is metered via a rotary valve 50 to the inlet 14 and from there to the agitator ball mill. Via a line 51, the material 52 is conveyed in the vicinity of the stirring shaft 26. In the area the stirring shaft 26, the material 52 is passed through a material guide 54 in the center of the first cage 38. The material flow MS from the first cage 38 into the grinding container 12 mixes there with the air flow LS, which flows through the fluid inlet 15 into the grinding container 12.
  • the first grinding element 28a which is moved by the agitator shaft 26, conveys the mixtures of material 52 and air 56 and of material 52 and auxiliary grinding bodies 30 into a central zone (not shown) in the area of the stirred ball mill in which the highest grinding auxiliary body density occurs.
  • a heating and / or coolant inlet 62 is shown. Through this inlet 62, it is possible to introduce heating and / or cooling agent into the double-walled Mahl actuallyerwandung 13 and thereby set the optimum for the grinding process temperature in the grinding container 12.
  • Fig. 3 schematically shows the structure of the outlet area 20 with a cleaning device 31 for the screen 24.
  • the cleaning device 31 is located in the center of the screen 24 in the extension of the agitator shaft 26.
  • the base 32, the cleaning device 31 is conically configured so that its diameter of the Agitator shaft 26 decreases in the direction of the outlet 18.
  • the cleaning device 31 is rotatable together with the agitator shaft 26 about its axis of rotation 25.
  • a channel 27 which passes through the stirring shaft 26, the cleaning device 31 is supplied with cleaning medium.
  • the cleaning medium is blown into the interior of the screen 24 by means of pressure through the outlet channels 33, the rotary cleaning device 31.
  • the outlet channels 33 of the cleaning device 31 upwards and would blow the cleaning medium in the direction AB radially through the screen 24. Due to the concentration of the outlet channels 33 on a portion of the screen 24, the rest remains free for the passage of the ground material. In this respect, the cleaning can also take place during the grinding process.
  • Fig. 4 schematically shows the structure of a grinding element 28a, 28b in side view.
  • Each refining element 28a, 28b is provided with a plurality of additional elements 36. Due to the inclination of the additional element 36, the regrind would, in this Embodiment transported in the conveying direction F.
  • the grinding element 28a, 28b is rotationally symmetrical and can be rotated with the stirring shaft (not shown) about the axis of rotation 25 of the stirring shaft.
  • Fig. 5 shows schematically the structure of a preferred grinding element 28a, 28b.
  • the preferred grinding element 28a, 28b has a triangular base body 29.
  • the shaft holder 44 for the stirring shaft (not shown).
  • the additional elements 36 are arranged at the rounded corners.
  • the additional elements 36 are fastened by means of screws 48 to the base body 29.
  • recesses 46 are introduced at three locations. These recesses are always placed in local proximity to the additional elements 36 for rotationally symmetrical reasons.
  • the additional elements 36 are fastened with screws 48 to the base body 29, these are interchangeable and / or to be attached in any position on the base body.
  • the locations at which the additional elements 36 are arranged in this embodiment, the locations of the refining element 28a, 28b, which come closest to the Mahl employerwandung (not shown). As a result, the wear is greatest at these points.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP11805377.6A 2010-10-27 2011-10-18 Rührwerkskugelmühle Active EP2632599B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010049827A DE102010049827A1 (de) 2010-10-27 2010-10-27 Rührwerkskugelmühle
PCT/DE2011/001864 WO2012055388A2 (de) 2010-10-27 2011-10-18 Rührwerkskugelmühle

Publications (2)

Publication Number Publication Date
EP2632599A2 EP2632599A2 (de) 2013-09-04
EP2632599B1 true EP2632599B1 (de) 2017-08-02

Family

ID=45463124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11805377.6A Active EP2632599B1 (de) 2010-10-27 2011-10-18 Rührwerkskugelmühle

Country Status (9)

Country Link
US (1) US8702023B2 (ja)
EP (1) EP2632599B1 (ja)
JP (1) JP5710772B2 (ja)
KR (1) KR101575027B1 (ja)
CN (1) CN103189142B (ja)
BR (1) BR112013009720B1 (ja)
DE (1) DE102010049827A1 (ja)
RU (1) RU2571069C2 (ja)
WO (1) WO2012055388A2 (ja)

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US10130953B1 (en) 2015-10-19 2018-11-20 Bill H. Ranne Submicron particle grinding mill
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CN107322829B (zh) * 2017-08-02 2019-08-13 安徽原动力生产力促进中心有限公司 一种3d打印材料的专用粉碎机
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DE102018123096B4 (de) * 2018-09-20 2022-01-27 Netzsch Feinmahltechnik Gmbh Rührwerkskugelmühle und Verfahren zum Betreiben einer Rührwerkskugelmühle
CN110385175A (zh) * 2019-07-29 2019-10-29 成都利君实业股份有限公司 一种可连续生产的水泥熟料粉磨实施装备
CN110449226B (zh) * 2019-07-29 2024-04-05 成都利君实业股份有限公司 一种水泥熟料粉磨实施装备及其搅拌装置
CN112808393A (zh) * 2020-12-31 2021-05-18 生态环境部南京环境科学研究所 一种立式连续搅拌球磨设备及其工作方法
FI130124B (en) * 2022-01-28 2023-03-08 Ecoup Oyj SCREENING DEVICE, SCREENING SYSTEM AND SCREENING METHOD
CN115318391B (zh) * 2022-07-26 2023-09-19 四川瑞驰拓维机械制造有限公司 一种自吸式低能耗立式砂磨机
CN115026973B (zh) * 2022-08-10 2022-11-01 常州市龙吟塑业有限公司 一种基于输血网加工的自动化上料设备

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Also Published As

Publication number Publication date
CN103189142A (zh) 2013-07-03
BR112013009720B1 (pt) 2020-07-28
JP5710772B2 (ja) 2015-04-30
KR20130118886A (ko) 2013-10-30
US8702023B2 (en) 2014-04-22
JP2013540584A (ja) 2013-11-07
US20130233953A1 (en) 2013-09-12
WO2012055388A3 (de) 2012-06-28
RU2013123787A (ru) 2014-12-10
CN103189142B (zh) 2014-08-20
RU2571069C2 (ru) 2015-12-20
DE102010049827A1 (de) 2012-05-03
EP2632599A2 (de) 2013-09-04
KR101575027B1 (ko) 2015-12-21
BR112013009720A2 (pt) 2016-07-19
WO2012055388A2 (de) 2012-05-03

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