EP3946741A1 - Rührwerkskugelmühle - Google Patents
RührwerkskugelmühleInfo
- Publication number
- EP3946741A1 EP3946741A1 EP21715572.0A EP21715572A EP3946741A1 EP 3946741 A1 EP3946741 A1 EP 3946741A1 EP 21715572 A EP21715572 A EP 21715572A EP 3946741 A1 EP3946741 A1 EP 3946741A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer stator
- rotor
- grinding
- grinding tools
- stator
- 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
Links
- 230000009969 flowable effect Effects 0.000 claims abstract 2
- 238000003801 milling Methods 0.000 abstract 14
- 238000009825 accumulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
-
- 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
- B02C17/20—Disintegrating members
-
- 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
- B02C17/18—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 present disclosure relates to an agitator ball mill and in particular to an agitator ball mill in which an improved fluidization and distribution of the auxiliary grinding bodies within the agitator ball mill is ensured.
- RWKM agitator ball mill
- Agitator ball mills are also known, for example, from the documents DE 4 008 472 A1, DE 19638354 A1 and WO 2006/116338 A2.
- the present disclosure comprises an agitator mill for treating free-flowing material to be ground with a circular-cylindrical outer stator and an agitator with a circular-cylindrical rotor that is rotatably mounted about a common central axis.
- the rotor is arranged inside the outer stator and a grinding chamber is formed between the rotor and the outer stator.
- the grinding chamber has a constant width between the outer stator and the rotor.
- a feed channel is located in front of the grinding chamber, through which the ground material can be fed into the grinding chamber.
- a discharge channel is provided through which the Grist can leave the grinding chamber.
- the feed and discharge channels thus define a flow direction through the grinding chamber that extends from the feed channel to the discharge channel.
- the grinding chamber is at least partially filled with auxiliary grinding bodies. Furthermore, rotor grinding tools are attached to the rotor which extend radially in the direction of the outer stator. Furthermore, external stator grinding tools are attached to the outer stator, which protrude radially with a length into the grinding chamber.
- the external stator grinding tools are arranged spaced apart in the circumferential direction and form rows. These rows are arranged parallel to one another on the outer stator along the central axis.
- the external stator grinding tools are also arranged in longitudinal rows, that is, perpendicular to the circumferential direction and along the central axis.
- the external stator grinding tools thus form, on the one hand, longitudinal rows in the direction of the central axis, that is to say along the direction of flow, and furthermore rows perpendicular thereto, that is to say circularly around the circumference of the external stator.
- the external grinding tools of at least one row, preferably three rows, of external stator grinding tools on the side of the grinding chamber facing away from the feed channel have a greater radial length than the other external stator grinding tools.
- the outer stator grinding tools at least in the rearmost row (s) in the flow direction in the circumferential direction i.e. all the outer stator grinding tools that are located on circles around the circumference of the outer stator that are most distant from the feed channel, have a greater radial length than the other outer stator grinding tools.
- the external stator preferably has six to twelve rows of external stator grinding tools in the circumferential direction and / or eight to twenty longitudinal rows of external stator grinding tools.
- the lower row or the lower preferably three rows in the circumferential direction are the rows with outer stator grinding tools of greater length.
- the outer stator grinding tools in each row in the circumferential direction can each have the same length.
- the length of the external stator grinding tools with greater length can be a factor of 1.5 to 2.5, preferably 1.75 to 2.25 and particularly preferably 2.0 longer than the length of the other external stator grinding tools.
- the length of the remaining external stator grinding tools can be between 5 and 20 mm, preferably between 7 and 15 mm.
- the rotor grinding tools each preferably have the same length, for example 20 mm to 40 mm.
- the external stator grinding tools and / or the rotor grinding tools are preferably designed in the form of pins.
- the pins preferably have a cylindrical shape, the length being at least as great as the diameter of the pins.
- a separating device can be provided within the rotor.
- the drainage channel for discharging the free-flowing material to be ground can be arranged behind the separating device.
- FIG. shows a cross section through an agitator ball mill according to an example of the invention.
- RWKM vertical agitator ball mill
- FIG. 1 The vertical agitator ball mill shown in FIG. 1 has an agitator with an essentially cylindrical rotor 1, the rotor 1 having an outer diameter Dl and an inner diameter dl.
- the rotor 1 is mounted rotatably about the central axis 5. This is aligned vertically according to the embodiment shown.
- the RWKM has an outer stator 2 with an outer stator inner diameter D2, which surrounds the rotor 1.
- the inner wall of the outer stator 2 facing the rotor 1 is circular-cylindrical.
- the rotor 1 and outer stator 2 are coaxial with the central axis 5.
- the rotor 1 has a circular cylindrical outer wall.
- a grinding chamber 4 is formed between the outer stator 2 and the rotor 1, which has the same radial thickness over the entire height and in the circumferential direction.
- the grinding chamber 4 thus has a constant ring size.
- the ground material to be treated is introduced into the grinding chamber 4 via a feed channel 7.
- the RWKM has an inner stator 22 with an inner stator outer diameter d22, which forms a discharge space 23 with the radially inner side of the rotor 1.
- the discharge space 23 is connected to the grinding space 4 via a channel which is formed below the rotor 1 in FIG. 1.
- the dispersed product thus flows from the grinding chamber 4 via the channel into the discharge chamber 23 to a separating device 3 which is arranged above the inner stator 22.
- the separating device 3 is set up to hold back any auxiliary grinding bodies that may be dragged along.
- a discharge channel 6 Centrally within the separating device 3 there is a discharge channel 6 which discharges the finished product from the machine.
- Rotor grinding tools 11 are attached to the outer wall of the rotor 1 and protrude into the grinding chamber 4 in the radial direction.
- Outer stator grinding tools 21, 211 are attached to the inner wall of the outer stator 2 and protrude into the grinding chamber 4 in the radial direction.
- the tools 11, 21, 211 are attached offset in such a way that a sufficient distance is formed between them when the rotor 1 rotates.
- the tools 11, 21, 211 are preferably in longitudinal rows parallel to the central axis, that is to say vertical in the embodiment shown, as well as in the circumferential direction on the circular cylindrical Outer wall of the rotor 1 or the circular cylindrical inner wall of the outer stator 2 attached.
- the tools 11, 21, 211 are preferably each equally spaced from one another in the longitudinal and / or in the circumferential direction. In other words, the tools 11, 21, 211 are evenly distributed.
- Each longitudinal row of tools 11, 21, 211 preferably has six to twenty tools 11, 21, 211 per row.
- six to twelve tools 11, 21, 211 are preferably attached per row of tools 11, 21, 211 in the circumferential direction.
- the invention is not linked to the number of tools 11, 21, 211 in the longitudinal and / or circumferential direction and can be applied to any RWKM with stator and rotor tools.
- the length denotes, unless otherwise defined, the radial length of the tools 11, 21, 211, ie the length that the tools 11, 21, 211 radially into the grinding chamber 4, ie in the direction of the outer stator 2 or in the direction of the rotor 1 protrude.
- the rotor tools 11 have the same length.
- the rotor tools 11 generally have a length of approximately 20 mm to 40 mm.
- the external stator grinding tools 211 have a greater length in the rear region of the external stator 2 (cf. FIG. 1) which is at the rear in the flow direction, that is to say in the lower region in the embodiment shown.
- the rear area faces the channel that connects the grinding chamber 4 and the discharge chamber 23.
- the rows of external stator grinding tools 21, 211 each have the same length in the circumferential direction. At least the lowest row (rearmost in the flow direction) of the external stator grinding tools 211 in FIG External stator grinding tools 211 have a greater length, these external stator grinding tools 211 preferably have the same length. A gradual increase in the length of the external stator grinding tools 21, 211 in the flow direction can also be expedient.
- the length of the outer stator grinding tools 211 with greater length can be a factor of 1.5 to 2.5, preferably 1.75 to 2.25 and particularly preferably a factor of 2.0 longer than the length of the other outer stator grinding tools 21.
- the length of the rest External stator grinding tools 21 can be between 5 and 20 mm, preferably between 7 and 15 mm.
- the ratio of the rotor outer diameter D1 to the outer stator inner diameter D2, the diameters being measured in each case without taking into account the grinding tools 11, 21, 211, is defined as follows
- the ratio of the inner stator outer diameter d22, with d22 being measured without taking into account the pins shown in FIG. 1, to the rotor inner diameter dl is defined as follows
- the ratio of the number of the outer stator grinding tools 211 with a greater length to the number of the remaining outer stator grinding tools 21 is between 0.1 and 0.5.
- the outer stator 2 has two outer stator grinding tools 211 of greater length and eight remaining outer stator grinding tools 21.
- the ratio of the height at which the outer stator grinding tools 211 protrude into the grinding chamber 4 with a greater length to the total height of the grinding chamber 4 is between 0.05 and 0.3, preferably between 0.1 and 0.2.
- the height at which the outer stator grinding tools 211 protrude into the grinding space 4 with a greater length is to be understood as the extent of the length of the outer stator grinding tools 211 with greater length in the axial direction, that is, the area of the grinding space 4 in which the length in the outer stator grinding tools 211 are arranged with a greater length in the grinding chamber. In other words, this corresponds to a vertical agitator mill the height of the process zone (grinding chamber 4), which is covered by the longer external stator grinding tools 211.
- the ratio of the length in which the outer stator grinding tools 211 protrude with greater length into the grinding chamber 4 to the outer stator inner diameter D2 is preferably between 0.05 and 0.4, particularly preferably between 0.2 and 0.3. With an extension of the outer stator grinding tools 211 with a greater length in the grinding chamber 4 of 150 mm and an outer stator inner diameter D2 of 550 mm, a ratio of 0.27 results.
- auxiliary grinding bodies can accumulate in part of the grinding chamber, especially in the downward flow direction, due to the drag forces.
- the extended external stator grinding tools in the rear area in the flow direction result in an improved fluidization of the auxiliary grinding bodies in the entire RWKM.
- An accumulation of auxiliary grinding bodies in a part of the machine can be effectively prevented. If there should be an accumulation of auxiliary grinding bodies during operation, this can be noticeably loosened and set in motion by using longer pins in the lower area of the outer stator. In this way, improved comminution results or better grinding results are achieved and the product quality is increased.
- the arrangement enables lower power consumption in the case of thin-bodied products with low viscosities (toughness) and / or less tack.
- the grinding tools of the present disclosure are preferably glued in place. This prevents procedural manipulation of the mill during operation.
- the tools are sealed to the stator by gluing, which avoids a reduction in the cooling surface.
- the tools of the external stator are preferably provided in two different defined lengths. This means that there is only one step in the tool length in the axial direction. This also ensures constant grinding conditions over the entire grinding time.
- the invention can also be used in an existing RWKM, in particular in a RWKM whose external stator grinding tools are designed to be exchangeable.
- the outer stator grinding tools of the rows in the circumferential direction facing away from the feed channel are replaced by outer stator grinding tools that have a correspondingly greater length.
- the external stator grinding tools of a desired number of rows are replaced, that is to say at least the tools of the rearmost row in the flow direction, preferably those of the three rearmost rows.
- the invention also includes individual features in the figures even if they are shown there in connection with other features and / or are not mentioned above.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20166428 | 2020-03-27 | ||
PCT/EP2021/057973 WO2021191430A1 (de) | 2020-03-27 | 2021-03-26 | Rührwerkskugelmühle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3946741A1 true EP3946741A1 (de) | 2022-02-09 |
EP3946741B1 EP3946741B1 (de) | 2023-08-23 |
Family
ID=70057005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21715572.0A Active EP3946741B1 (de) | 2020-03-27 | 2021-03-26 | Rührwerkskugelmühle |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230158511A1 (de) |
EP (1) | EP3946741B1 (de) |
JP (1) | JP7454066B2 (de) |
KR (1) | KR20220151215A (de) |
CN (1) | CN114096354B (de) |
WO (1) | WO2021191430A1 (de) |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1025708A (fr) * | 1950-10-07 | 1953-04-20 | Suisse Jaruza A G Chur Sa | Trommel-concasseur |
US3149789A (en) * | 1960-10-28 | 1964-09-22 | Szegvari Andrew | Continuous process of grinding particulate material |
DE2329987C2 (de) * | 1973-06-13 | 1982-12-02 | Gebrüder Netzsch, Maschinenfabrik GmbH & Co, 8672 Selb | Rührwerksmühle |
DE2629251A1 (de) * | 1976-06-30 | 1978-01-12 | Draiswerke Gmbh | Ruehrwerksmuehle |
DD282612A5 (de) | 1989-04-25 | 1990-09-19 | Nagema Veb K | Strukturwandler zur kontinuierlichen bearbeitung von dispersionen |
DE4002613A1 (de) * | 1990-01-30 | 1991-08-01 | Draiswerke Gmbh | Ruehrwerksmuehle |
EP0752274A1 (de) * | 1995-07-07 | 1997-01-08 | MAZZONI LB FOOD S.r.l. | Rührwerksmühle zum Mahlen von Feststoffmaterial und insbesondere dispergiertem Feststoffmaterial in einer kontinuierlichen lipid Phase |
DE19638354A1 (de) * | 1996-09-19 | 1998-03-26 | Draiswerke Inc Mahwah | Rührwerksmühle |
JPH10113567A (ja) * | 1996-10-08 | 1998-05-06 | Aimetsukusu Kk | 縦型湿式粉砕装置 |
EP0913200B1 (de) * | 1997-10-28 | 2003-04-23 | DRAISWERKE GmbH | Rührwerksmühle |
CN1307934A (zh) * | 2001-02-12 | 2001-08-15 | 宜兴市洪流集团公司 | 一种改进的砂磨机 |
JP2006255519A (ja) | 2005-03-15 | 2006-09-28 | Masumi Kusunoki | 媒体循環型粉砕装置 |
WO2006116338A2 (en) | 2005-04-25 | 2006-11-02 | Draiswerke, Inc. | Multi-stage agitator mill |
EP1724022B1 (de) | 2005-05-19 | 2007-05-02 | Bühler AG | Rührwerksmühle |
EP1992412B1 (de) | 2005-10-11 | 2010-02-03 | Bühler Ag | Rührwerksmühle |
JP5401401B2 (ja) | 2010-06-07 | 2014-01-29 | ビューラー アーゲー | アジテータミル |
EP2846917B1 (de) * | 2012-05-10 | 2019-09-18 | Belmonte Investments Limited | Rührwerksmühle und prozess für benutzung davon |
CN205518018U (zh) * | 2016-03-09 | 2016-08-31 | 青岛蓝色世纪国际贸易有限公司 | 纳米级大分子天然沥青研磨机 |
CN206046120U (zh) * | 2016-08-29 | 2017-03-29 | 罗星莲 | 一种具有烘干作用的中药加工研磨器 |
CN207238219U (zh) * | 2017-08-17 | 2018-04-17 | 深圳市叁星飞荣机械有限公司 | 一种立式无机械密封介质搅拌磨的料珠分离装置 |
EP3536406A1 (de) | 2018-03-07 | 2019-09-11 | Bühler AG | Rührwerksmühle |
CN108499650B (zh) * | 2018-06-16 | 2024-01-26 | 长沙学院 | 旋锥搅拌球磨机 |
-
2021
- 2021-03-26 CN CN202180002958.2A patent/CN114096354B/zh active Active
- 2021-03-26 KR KR1020227036477A patent/KR20220151215A/ko active IP Right Grant
- 2021-03-26 US US17/907,056 patent/US20230158511A1/en active Pending
- 2021-03-26 JP JP2022557820A patent/JP7454066B2/ja active Active
- 2021-03-26 WO PCT/EP2021/057973 patent/WO2021191430A1/de unknown
- 2021-03-26 EP EP21715572.0A patent/EP3946741B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
JP7454066B2 (ja) | 2024-03-21 |
CN114096354A (zh) | 2022-02-25 |
EP3946741B1 (de) | 2023-08-23 |
WO2021191430A1 (de) | 2021-09-30 |
CN114096354B (zh) | 2023-08-15 |
JP2023521302A (ja) | 2023-05-24 |
US20230158511A1 (en) | 2023-05-25 |
KR20220151215A (ko) | 2022-11-14 |
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