EP2189221B1 - Rührwerkskugelmühle - Google Patents

Rührwerkskugelmühle Download PDF

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Publication number
EP2189221B1
EP2189221B1 EP09006371.0A EP09006371A EP2189221B1 EP 2189221 B1 EP2189221 B1 EP 2189221B1 EP 09006371 A EP09006371 A EP 09006371A EP 2189221 B1 EP2189221 B1 EP 2189221B1
Authority
EP
European Patent Office
Prior art keywords
grinding
ball mill
gap
size reduction
reduction 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.)
Active
Application number
EP09006371.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2189221A3 (de
EP2189221A2 (de
Inventor
Theron Harbs
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
Priority to PL09006371T priority Critical patent/PL2189221T3/pl
Publication of EP2189221A2 publication Critical patent/EP2189221A2/de
Publication of EP2189221A3 publication Critical patent/EP2189221A3/de
Application granted granted Critical
Publication of EP2189221B1 publication Critical patent/EP2189221B1/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

Definitions

  • Agitator ball mill with a mixing vessel surrounding a stirring shaft, which is provided with a product inlet and a product outlet, wherein the Mahltospian located within the grinding container are activated by the rotation of the stirring shaft and retained by a separating or classifying device in the grinding chamber.
  • This agitator ball mill goes out of the FIG. 1 of the DE 44 12 408 A1 out.
  • This agitator ball mill has a double-walled grinding container, which is suitable for cooling.
  • the coaxial with the grinding container arranged agitator shaft is connected to a gear and a drive.
  • the grinding container has a Mahlguteinlcorro in its lid and centrally in its bottom a Mahlgutauslenfin.
  • Mahltosenia located in the grinding chamber located on the stirrer shaft, provided with holes grinding discs, the Mahltos emotions in motion, whereby the energy that acts from the engine to the grinding discs, transfers to the Mahltos emotions.
  • a separating device may also be provided.
  • a vertically arranged agitator ball mill known from the DD 217 434 B1 is a vertically arranged agitator ball mill known.
  • This agitator ball mill works with a stirring shaft to which a screw-shaped grinding element is attached.
  • a pre-shredding device connected to the stirrer shaft, which consists of a crushing cone and a crushing ring fastened to the grinding container wall.
  • the material to be ground or the material to be fed passes directly to the top side of the conveyor via a screw conveyor Brechkegels and from there into the crushing gap. After pre-shredding the material falls into the grinding container, where it is processed by the stirring shaft and the Mahl morn located in the grinding container.
  • the filling level in the grinding container is monitored by a level measuring device. This is not possible with horizontally arranged mills and mills whose grinding space is fully utilized. In these cases, the material to be ground with the Mahlöskörpem in the field of Vorzerkleir michs heard.
  • the patent application WO 2006/11638 A2 discloses a vertical agitating ball mill which is provided in the inlet area, the material feed, with a pre-shredding device.
  • the pre-shredding is realized via two actively connected rings, wherein one of the rings is at least partially adjustable.
  • EP 0 276 811 A2 and EP 0 276 812 A2 disclose vertical agitator ball mills. These agitator ball mills are provided in the region of the outlet for the ground material with separating devices for separating Mahlangeskörpem and regrind. For separating elements are arranged on annular rotors, with which the Mahltos redesign be transported back by the centrifugal force in the grinding container. There are always several individual elements arranged on a rotatable rotor.
  • the aim of the invention is to combine a grinding and dispersing with a pre-crushing, which is largely protected against the wear that can cause the Mahlgut- / MahlosSystemgemisch.
  • Mahl ⁇ sharmas Due to the pressure prevailing in the grinding container and the percentage high Mahlos stresses circulllung in the grinding container, during the operation of the ball mill, Mahlos stresses reach the grinding gap of Vorzerklein ceremoniess observed and here to wear or other
  • Impairments Because of this, it is provided according to the invention to protect the grinding gap by a dynamic gap protection.
  • the gap protection is arranged as a rotating part after the pre-shredder.
  • the effect of the gap protection is improved according to the invention in that in this case a ring element is used, which is connected to the rotor of the pre-shredder.
  • the ring element hurls the Mahltosisson radially in the region of the grinding gap and simultaneously generates a negative pressure zone at the end of the gap transition to the grinding chamber whereby the product easily passes from the grinding zone into the grinding chamber.
  • the ring element on the grinding chamber-side end of the grinding gap on a neck which is designed wedge-shaped.
  • This design has the advantage that between the approach and the ring element, a distance can be maintained, which corresponds to 2 to 10 times the width of the grinding gap. This distance can be adapted in case of complicated construction of the attachment of the ring element, the size of the pre-shredded material or Mahlöskörpem.
  • the dynamic ring element overlaps the grinding gap in a ratio of 2 to 10 times the width of the grinding gap.
  • the rotating part of the pre-shredding device is connected to the stirrer shaft.
  • the stationary part of the pre-shredding device communicates with the grinding container. This is particularly advantageous when this area of the grinding container is cooled. Even the cooling of one of the parts of the pre-shredding device keeps the product temperature constant during the pre-shredding.
  • the toothed disks are arranged so that their surfaces directed towards the grinding chamber of the rotating and stationary parts of the pre-shredding device simultaneously form the inlet-side grinding chamber boundary.
  • the gap formed by the stationary and the rotating part of the pre-shredding device is advantageously kept smaller than the diameter of the grinding auxiliary body located in the grinding chamber. In this case, a gap width of 0.2 - 2 mm is selected.
  • either the rotating or the stationary part of the pre-shredding device can be axially adjustable, whereby the gap width can be changed during, before or after the production process.
  • both the rotating and the stationary part of the pre-shredding device are axially adjustable via threads on the agitator shaft or on the grinding container. Lock nuts fix the corrected working position.
  • the rotating and / or the stationary part of the pre-shredding device can be corrected by electrical or hydraulic actuators in their position.
  • the initiatable via external command elements piston or electric drives thus allow a direct intervention on the pre-crushing and thus also an intervention on the fineness of the grinding process supplied product.
  • FIG. 1 shows an agitator ball mill 10 with a grinding container 12 which is surrounded by a cooling jacket 14.
  • grinding chamber 16 In grinding chamber 16 are Mahltosterrorism 18, which are shown purely for demonstration only in a certain area of the grinding chamber.
  • the stirring shaft 20 In the grinding chamber itself is the stirring shaft 20, are placed on the grinding discs 22, with holes 24. The stirring shaft is rotated by a drive, not shown in rotation.
  • a preclassifier 26 which consists of a cage-like structure with a plurality of rods 28 and at least one closely spaced to the cage, provided with holes disc 30th can exist.
  • a separator in the form of a sieve 32 downstream of the preclassifier.
  • the product leaves the grinding chamber through the product outlet 34, which is arranged centrally in the grinding container bottom 36.
  • the grinding vessel bottom itself is connected by screws 38 to a grinding vessel flange 40.
  • the product inlet 42 Through the product inlet 42, the product passes into the inlet chamber 44, to which the seal 46 abuts, which in turn sits on the drive shaft 48.
  • the pre-shredding device 50 From the inlet chamber, the product passes to the pre-shredding device 50, which is composed of a stationary part 52 and a rotating part 54.
  • the standing part 52 overlaps both the coolant channel 56 and the Mahl alternerdeckel 58.
  • the standing and thus the rotating part of the pre-crushing device may be moved towards the grinding chamber, so that the standing ring can be tempered more intensively by the coolant flowing in the coolant channel.
  • the grinding chamber facing surface 60 of the stationary part and the surface 62 of the rotating part form the inlet side grinding chamber boundary.
  • the annular grinding gap has a width of 0.2 - 2 mm.
  • FIG. 2 shows the arrangement of a dynamic gap protection 68, which is designed as a ring element 80.
  • the gap protection 68 that is to say the ring element 80, is connected via screws 38 both to the rotating toothed disk 70 and to the rotating part 54 of a hub.
  • the hub has central bores 72, by means of which the attachment to the agitator shaft 20 takes place.
  • FIG. 3 shows a not covered by the invention arrangement of a gap protection 68, which is adjacent only to the grinding gap.
  • Its ring member 80 is made of wear-resistant material such as ceramic, high-alloy steel or the like.
  • the ring member 80 does not overlap the gap in this embodiment. In this case, the proximity of the rotating part 70 to the grinding gap and possibly the generated radial flow is sufficient to keep the grinding gap 64 at its mouth to the grinding chamber 16 free of auxiliary grinding bodies.
  • the ratio of the width a of the refining gap 64 to the radial overlap c through the shoulder is 1: 3.
  • the axial distance b of the projection 74 to the end of the grinding gap 64 is compared to the width a of the grinding gap 64 in a ratio of 1: 4. This distance ratio allows a resistance-free entry of the pre-shredded product in the grinding chamber 16, since the approach 74 or its, the grinding gap 64 opposite surface does not inhibit the inflow.
  • the projection 74 of the gap protection 68 is in this embodiment as a wedge-shaped or nose-shaped approach.
  • the bevel reduces the wear on the circumference of the ring member 80 and minimizes turbulence.
  • FIGS. 6 and 7 show a variant embodiment in which the gap protection 68 does not work dynamically but statically. For this lies the ring element

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
EP09006371.0A 2008-11-22 2009-05-12 Rührwerkskugelmühle Active EP2189221B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09006371T PL2189221T3 (pl) 2008-11-22 2009-05-12 Młyn kulowy z mieszadłem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008058585A DE102008058585A1 (de) 2008-11-22 2008-11-22 Rührwerkskugelmühle

Publications (3)

Publication Number Publication Date
EP2189221A2 EP2189221A2 (de) 2010-05-26
EP2189221A3 EP2189221A3 (de) 2013-04-24
EP2189221B1 true EP2189221B1 (de) 2014-07-16

Family

ID=41466885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09006371.0A Active EP2189221B1 (de) 2008-11-22 2009-05-12 Rührwerkskugelmühle

Country Status (7)

Country Link
US (1) US8028943B2 (da)
EP (1) EP2189221B1 (da)
BR (1) BRPI0902612B1 (da)
DE (1) DE102008058585A1 (da)
DK (1) DK2189221T3 (da)
ES (1) ES2517940T3 (da)
PL (1) PL2189221T3 (da)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2327480A1 (de) * 2009-11-25 2011-06-01 Willy A. Bachofen AG Rührwerkskugelmühle
DE102010049827A1 (de) * 2010-10-27 2012-05-03 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle
DE102010053484A1 (de) * 2010-12-04 2012-06-06 Netzsch-Feinmahltechnik Gmbh Dynamisches Element für die Trenneinrichtung einer Rührwerkskugelmühle
DE102011010527A1 (de) * 2011-02-07 2012-08-09 Lipp Mischtechnik Gmbh Rührwerkskugelmühle
DE102011076157A1 (de) 2011-05-20 2012-11-22 Devetec Gmbh Wärmekraftmaschine
CN102553684A (zh) * 2011-12-31 2012-07-11 西安交通大学 一种刮铲搅拌卧式高能球磨机
DE102012001417A1 (de) 2012-01-26 2013-08-01 Netzsch-Feinmahltechnik Gmbh Verfahren zum Herstellen von Fettmassen
DE102012013279A1 (de) * 2012-07-05 2014-01-09 Roland Nied Verfahren zum Betrieb einer Rührwerkskugelmühle sowie Rührwerkskugelmühle dafür
US9764329B2 (en) * 2013-01-15 2017-09-19 Aaron Engineered Process Equipment, Inc. Rotary mill
CN105592927B (zh) 2013-05-21 2018-04-27 Fl史密斯公司 用于持续监测研磨回路中的磨损的方法和装置
DE102013111762A1 (de) * 2013-07-08 2015-01-08 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle mit Axialkanälen
DE102013111297B4 (de) * 2013-10-14 2025-12-18 Netzsch-Feinmahltechnik Gmbh Vorzerkleinerungsvorrichtung für eine Kugelmühle oder Rührwerkskugelmühle und Kugelmühle mit Vorzerkleinerungseinrichtung
DE102013021757A1 (de) * 2013-12-20 2015-06-25 Netzsch Trockenmahltechnik Gmbh Maschine mit fliegend gelagertem Rotor
DE102013021756A1 (de) * 2013-12-20 2015-06-25 Netzsch Trockenmahltechnik Gmbh Mahlkörpermühle und Betriebsverfahren dafür
CN105664768B (zh) * 2016-03-30 2018-07-06 肇庆市富强陶瓷有限公司 一种陶瓷制品用粉末原料搅拌装置
CN105618207A (zh) * 2016-04-08 2016-06-01 中国神华能源股份有限公司 球磨机
EP3311922B1 (de) 2016-10-18 2018-12-05 Willy A. Bachofen AG Rührwerkskugelmühle
DE102018123096B4 (de) * 2018-09-20 2022-01-27 Netzsch Feinmahltechnik Gmbh Rührwerkskugelmühle und Verfahren zum Betreiben einer Rührwerkskugelmühle
CN110694751A (zh) * 2019-10-22 2020-01-17 上海琥崧智能科技股份有限公司 一种离心出料的卧式砂磨机及离心出料方法
TR202102379A2 (tr) * 2021-02-19 2021-06-21 Ilhan Guelbeyaz Spi̇ral geometri̇li̇ öğütücü deği̇rmen
DE102022109275A1 (de) * 2022-04-14 2023-10-19 Netzsch-Feinmahltechnik Gmbh Verfahren zum Herstellen einer pumpbaren Paste aus den Samen von Nuss- oder Steinfrüchten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6028487Y2 (ja) * 1981-03-16 1985-08-29 浅田鉄工株式会社 グレインミル等におけるダイナミックセパレ−タ−
DE3249928C3 (de) * 1982-12-10 1995-06-29 Buehler Ag Geb Rührwerksmühle
DD217434B1 (de) 1983-07-01 1987-06-24 Dessau Zementanlagenbau Veb Ruehrwerkskugelmuehle
JPS63118950U (da) * 1987-01-26 1988-08-01
JPS63122642U (da) * 1987-01-30 1988-08-09
DE4412408C2 (de) 1994-04-11 2003-03-20 Netzsch Erich Holding Rührwerksmühle
US5853132A (en) * 1996-03-06 1998-12-29 Fuji Photo Film Co., Ltd. Dispersing machine
WO2006116338A2 (en) * 2005-04-25 2006-11-02 Draiswerke, Inc. Multi-stage agitator mill

Also Published As

Publication number Publication date
PL2189221T3 (pl) 2015-01-30
BRPI0902612A2 (pt) 2010-09-14
ES2517940T3 (es) 2014-11-04
US20100127108A1 (en) 2010-05-27
DE102008058585A1 (de) 2010-05-27
US8028943B2 (en) 2011-10-04
EP2189221A3 (de) 2013-04-24
EP2189221A2 (de) 2010-05-26
DK2189221T3 (da) 2014-10-06
BRPI0902612B1 (pt) 2020-04-07

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