EP0719585B1 - Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen - Google Patents

Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen Download PDF

Info

Publication number: EP0719585B1
Authority: EP; European Patent Office
Prior art keywords: grinding; agitator; outlet; mill; separator
Prior art date: 1994-12-31
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.): Revoked

Application number

EP95119228A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0719585A1 (de

Inventor

Ulrich Barthelmess

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.)

Omya GmbH

Original Assignee

Omya 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.)

1994-12-31

Filing date

1995-12-06

Publication date

1999-06-16

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6537543&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0719585(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1995-12-06 Application filed by Omya GmbH filed Critical Omya GmbH

1996-07-03 Publication of EP0719585A1 publication Critical patent/EP0719585A1/de

1999-06-16 Application granted granted Critical

1999-06-16 Publication of EP0719585B1 publication Critical patent/EP0719585B1/de

2015-12-06 Anticipated expiration legal-status Critical

Status Revoked legal-status Critical Current

Images

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 mills are used to manufacture such fine products, especially the slurry.
grinding pearls According to the increasing delicacy ever smaller grinding pearls are used, whereby the Contact points between the too coarse particles and two each Grinding beads, and thus the grinding effect can be increased.
the grinding effect is improved if the grinding beads do not have essentially the same size, but if grinding beads of different sizes work together in the mill. This increases the likelihood that the differently sized limestone particles will be ground between appropriately sized grinding beads, ie larger particles between larger grinding beads and smaller particles between smaller grinding beads. It is important here that with increasing fineness of the limestone particles to be comminuted, ever finer grinding pearls are also present. It should be considered that the grinding beads become smaller and smaller in the grinding process due to abrasion.
sieves are arranged on the outlet side of the grinding container between the grinding chamber and the fine material outlet.
the sieve openings thus determine the size of the particles in the fine material: larger particles are retained by the sieve, finer particles pass through.
the finest sieves that can be used in practice have sieve openings of approx. 100 ⁇ m. This means that the fineness of the lime particles as well as the continuous grinding beads is about 100 ⁇ m. This grain size is too large for many applications, a finer grain size of less than 40 ⁇ m is desired.
centrifugal force increases with the square of the radius, that is to say it is greatest radially on the outside and decreases radially inward in the square. Accordingly, the restraint can essentially only take place on the outer circumference, where the centrifugal force is correspondingly greatest: those particles that have been dragged into a radial bore by the flow are immediately subject to a centrifugal force that decreases in square, while the flow force corresponds to the narrow cross-section high is: Particles caught in a radial hole no longer have a chance to be thrown outwards.
the separator body is surrounded by a sieve or filter, that is to say every radial bore is covered by a filter through which a particle - if it could get into the bore radially on the inside at all - returns again , would have to be thrown out through the sieve.
the gap width is smaller than the pearls to be retained, Smaller grinding pearls can pass through together with the fine material drain the column. However, even when using one A large number of such plates or gaps in the flow cross section too small, so that there are difficulties in operation.
the object of the invention is an agitator mill to create with a bead separator, the Separation limit corresponds to the upper fine grain size with which Sieves or filters for the retention of grinding beads are avoided, and which nevertheless ensures that no grinding pearls or Dispersant particles get into the finished product can.
this object is essentially achieved in that the separator is designed in the manner of a classifying rotor of a centrifugal classifier.
the bottom of the rotor is closed by a lower disc, which is firmly connected to the agitator shaft.
the coarse suspension fed into the mill at the bottom is ground to the desired fineness on the way up and flows into the upper annular space between the housing wall and the classifying rotor.
the regrind is brought together by the blades of the classifier rotor with the grinding beads contained in it in the upper annulus in Accelerated circumferential direction and thus to a larger one Brought peripheral speed.
the grinding beads as well as the still too coarse particles of the regrind are due to their larger Mass by centrifugal force in the outer annulus, i.e. in the Grinding container retained.
Each together with the Fine material flow coming close to the rotor circumference Bead is ground by the blades in the circumferential direction accelerated, d. H. the particle is gripped accordingly stronger centrifugal force acting radially outwards, thus the particle is thrown off tangentially, i.e. in the grinding container held back.
the fines come between two Blade of the classifier / separator rotor through in the radially inner outlet space and from there into the outlet line.
the coarser particles can be separated or retained at the required small separation limit of approx. 40 ⁇ m and below.
the separation limit of a centrifugal force rotor becomes smaller the higher the speed and the higher the radius, since it is known that the centrifugal force increases with the speed and the square of the radius.
ever finer particles are retained by the centrifugal force against the flow generated by a vacuum or suction in the outlet line. The separation or restraint takes place on the outer circumference of the classifying rotor.
Uniform separation conditions are thus obtained on a relatively large separating surface corresponding to the radius and the axial height of the classifying rotor, so that it is all the less that large particles are entrained into the fine material under irregular flow or irregular centrifugal force. So there is no or only a little too coarse grain (grinding beads or lime particles) in the fine material.
a correspondingly dimensioned rotor can be advantageous directly be moored on the shaft of the agitator, so that no separate Drive for the classifier rotor is required.
the speed of the classifying rotor is equal to Speed of the grinder is obtained for the desired fine Separation limit of approx. 40 ⁇ m a larger radius of the rotor than that Radius of the grinder.
the classifier rotor is therefore in one Diameter corresponding to the wider upper part of the housing or housed in a housing attachment (claim 2). It is it favorable for a steady flow and especially for a decrease in the particles rejected by the classifier rotor when the Annulus between classifier rotor and housing wall relatively large is.
classifier rotors can also be accommodated in a correspondingly large upper housing part, each of which can be driven separately at the desired speed, independently of the agitator.
a classifier rotor is rotatably mounted on the agitator shaft and driven by the agitator shaft by a separate drive or via a countershaft.
laim 4 Practical testing has shown that there is surprisingly little grain that is too coarse, that is, faulty grain, in the fine material that has passed through the classifying rotor. This very important result can be attributed, among other things, to the following effect: The temperature in the mill rises to over 100 ° C due to the friction. So far, steam bubbles have formed in the mill.
the classifying rotor used according to the invention builds up pressure due to the centrifugal force. During operation, this results in an overpressure of a few bar in the direction of flow outside the classifying rotor. At this overpressure, the boiling temperature rises accordingly.
the classifying rotor as a retaining element, the formation of vapor bubbles and the transport of the faulty grain based on these into the inside of the classifying rotor are avoided.
the agitator bead mill consists of one in the example case vertical, cylindrical grinding container 1, in which an agitator is rotatable.
the agitator consists of the agitator shaft 2, the with annular or radially extending stirring elements 3 is equipped.
the raw suspension to be ground is fed through a Inlet port 4 fed to the lower end of the grinding container.
In the grinding container is a filling of grinding beads 5, the in the course of operation to an ever finer particle size are worn out or rubbed off.
For the grinding effect is the interaction of large and small grinding beads Cheap. If possible, the grinding beads should be in the Grinder will be held back until the smaller grinding beads from the larger ones have been reduced to the fineness of the fine material are.
the classifier rotor sits firmly on the agitator shaft, is thus driven by the agitator shaft 2, so that no separate drive is required.
the diameter of the classifying rotor 6 is larger than that Diameter or the radial extent of the stirring elements 3.
the classifier rotor 6 is located therefore in an upper extension 8 of the housing; a conical transition part 9 leads from the normal outer diameter of the grinding container over to the larger outside diameter for grinding pearl and coarse grain retention.
the rotor blades 10 or webs of the classifying rotor 6 are between a lower end ring 11 and an upper end ring 12 captured.
the lower end ring is on a support disk 13 attached, the radially inner edge of the agitator shaft 2 or is attached to a sleeve 2a fixed on this.
the upper end ring 12 of the rotor is provided with radial arms 14 a ring 15 also attached to the sleeve 2a.
the agitator (and classifier) shaft 2 / 2a carries below the upper one End wall a ring 22; in the space between this Ring 22 and the upper end wall 20 is another Wreath of radial rods 23, whereby the fine material space 18 opposite the outside atmosphere is sealed.
the classifying rotor 6 is by means of two bearings 24, 25 rotatable on the agitator shaft 2 stored.
the lower bearing 25 is an axial bore 26th and a radial bore 26a a detergent, e.g. B. water or a dispersant required in the mill anyway.
the classifier rotor can be driven by the agitator shaft or be derived from the drive of the agitator shaft, e.g. B. means a gear, with which the speed of the agitator shaft translates the required higher speed of the classifier rotor becomes.

Landscapes

Engineering & Computer Science (AREA)
Food Science & Technology (AREA)
Crushing And Grinding (AREA)
Disintegrating Or Milling (AREA)
Processing Of Solid Wastes (AREA)
Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

EP95119228A 1994-12-31 1995-12-06 Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen Revoked EP0719585B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4447321A DE4447321C2 (de)	1994-12-31	1994-12-31	Rührwerksmühle für die nasse Feinzerkleinerung, mit Separator zur Zurückhaltung von Mahlperlen
DE4447321		1994-12-31

Publications (2)

Publication Number	Publication Date
EP0719585A1 EP0719585A1 (de)	1996-07-03
EP0719585B1 true EP0719585B1 (de)	1999-06-16

Family

ID=6537543

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95119228A Revoked EP0719585B1 (de)	1994-12-31	1995-12-06	Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen

Country Status (9)

Country	Link
US (1)	US5630557A (el)
EP (1)	EP0719585B1 (el)
JP (1)	JP2929078B2 (el)
AT (1)	ATE181258T1 (el)
CA (1)	CA2165886C (el)
DE (2)	DE4447321C2 (el)
DK (1)	DK0719585T3 (el)
ES (1)	ES2135648T3 (el)
GR (1)	GR3030663T3 (el)

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AU679853B2 (en) *	1994-04-11	1997-07-10	Erich Netzsch Gmbh & Co Holding Kg	Attrition mill
US5984213A (en) *	1994-04-11	1999-11-16	Mount Isa Mines Limited	Attrition mill
US5882246A (en) *	1995-06-06	1999-03-16	Kotobuki Eng. & Mfg. Co., Ltd.	Wet agitating ball mill and method
DE19832769C2 (de) *	1998-07-22	2000-09-28	Netzsch Erich Holding	Verfahren zum Betreiben einer Rührwerksmühle
TW531450B (en) *	2002-08-26	2003-05-11	Ind Tech Res Inst	Method and device for grinding fine particles
PL1468739T3 (pl) *	2003-04-15	2008-10-31	Bachofen Willy A Ag	Młyn kulowy z mieszadłem
CN100387351C (zh) *	2003-08-01	2008-05-14	财团法人工业技术研究院	微粒研磨装置
US20050221246A1 (en) *	2003-10-31	2005-10-06	Dan Drinkwater	Apparatus and method for liberating deleterious material from fine aggregate
CN100408191C (zh) *	2004-03-18	2008-08-06	张仁鸿	研粉机的分离机构
GB2418164B (en) *	2004-04-08	2006-09-06	Jin-Hong Chang	A separator
US20090212141A1 (en) *	2005-06-08	2009-08-27	Alan Taylor	Milling apparatus
CN100457297C (zh) *	2006-01-23	2009-02-04	上海建设路桥机械设备有限公司	用于粉体加工的涡轮分级机
GB0724572D0 (en)	2007-12-17	2008-01-30	Specialist Process Technologie	A separation device
JP5261002B2 (ja) *	2008-03-31	2013-08-14	アシザワ・ファインテック株式会社	メディア混合式ミル
EP2683487B1 (de) *	2011-03-11	2016-03-09	Willy A. Bachofen AG	Rührwerkskugelmühle
KR101163481B1 (ko) *	2012-02-20	2012-07-18	이건의	필터 및 씰링이 필요없는 습식 분쇄장치
JP6011155B2 (ja) *	2012-08-24	2016-10-19	住友大阪セメント株式会社	循環型メディア撹拌ミル
BE1021522B1 (fr)	2012-09-12	2015-12-07	S.A. Lhoist Recherche Et Developpement	Composition de lait de chaux de grande finesse
US10495629B2 (en) *	2013-03-06	2019-12-03	Blaze Medical Devices, Inc.	Bead mill and method of use
CN104289279A (zh) *	2014-10-09	2015-01-21	苏州明锦机械设备有限公司	一种球磨机
CN104888978B (zh) *	2015-05-29	2017-11-10	蚌埠市兴利离心机制造有限公司	一种具有自动卸料功能的立式离心机
CN104888973B (zh) *	2015-05-29	2018-06-12	蚌埠市兴利离心机制造有限公司	一种立式沉降离心机
JP6072171B1 (ja) *	2015-08-24	2017-02-01	アシザワ・ファインテック株式会社	軸封を使用しない連続式のメディア撹拌型粉砕機
CN105327743B (zh) *	2015-10-28	2018-03-16	中国矿业大学	一种多室立式搅拌磨机
CN105289857B (zh) *	2015-11-09	2017-11-21	河南师范大学	纳米级动态离心分离装置
CN107230770B (zh) *	2017-07-12	2023-06-02	湖南艾威尔新能源科技有限公司	锂电池正极材料生产系统
CN108405087A (zh) *	2018-03-13	2018-08-17	陈丽专	一种生物反应和生物分离装置
CN108405086A (zh) *	2018-03-13	2018-08-17	陈丽专	一种医药研究、生产及其检测用试剂盒装置
CN111215200B (zh) *	2020-01-17	2021-02-12	常州易得机械有限公司	一种研磨均质机
JP7128854B2 (ja) *	2020-05-12	2022-08-31	佐竹マルチミクス株式会社	分級装置
JP7307981B2 (ja) *	2020-10-15	2023-07-13	株式会社広島メタル＆マシナリー	ビーズミル
CN112518993B (zh) *	2020-12-02	2021-12-14	南京五环新型材料科技有限公司	一种混凝土的制备系统及制备方法
JP7717590B2 (ja) *	2021-11-30	2025-08-04	佐竹マルチミクス株式会社	分級機及び、この分級機の設計方法
CN114682347B (zh) *	2022-05-07	2023-04-28	大连大学	一种离心机辅助的小尺寸纳米材料分离方法及装置
CN115845975B (zh) *	2022-10-24	2023-05-26	邯郸学院	一种高分子化学材料颗粒的多级研磨装置
CN117138898B (zh) *	2022-12-20	2024-04-16	宿州学院	一种研磨设备及其研磨珠在线换珠方法
CN116850869A (zh) *	2023-07-05	2023-10-10	浙江汇能生物股份有限公司	一种马度米星铵速效制剂制备用载体加工装置

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DE2631623C2 (de) *	1976-07-14	1985-06-13	Draiswerke Gmbh, 6800 Mannheim	Rührwerksmühle
DE3440993C2 (de) *	1984-11-09	1987-02-26	Omya GmbH, 5000 Köln	Rührwerksmühle, insbesondere Rührwerkskugelmühle
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SU1475709A1 (ru) *	1987-08-11	1989-04-30	Предприятие П/Я А-3917	Бисерна мельница
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FR2650198B1 (fr) *	1989-07-26	1995-02-17	Chauveau Jean Marie	Procede et broyeur pour la fabrication d'un produit forme par une suspension de particules solides dans un vehicule gras
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JP2566884Y2 (ja) *	1992-05-27	1998-03-30	三井鉱山株式会社	粉砕機

1994
- 1994-12-31 DE DE4447321A patent/DE4447321C2/de not_active Revoked
1995
- 1995-12-06 EP EP95119228A patent/EP0719585B1/de not_active Revoked
- 1995-12-06 DK DK95119228T patent/DK0719585T3/da active
- 1995-12-06 AT AT95119228T patent/ATE181258T1/de not_active IP Right Cessation
- 1995-12-06 ES ES95119228T patent/ES2135648T3/es not_active Expired - Lifetime
- 1995-12-06 DE DE59506233T patent/DE59506233D1/de not_active Revoked
- 1995-12-21 CA CA002165886A patent/CA2165886C/en not_active Expired - Fee Related
- 1995-12-28 US US08/579,813 patent/US5630557A/en not_active Expired - Fee Related
1996
- 1996-01-04 JP JP8016962A patent/JP2929078B2/ja not_active Expired - Fee Related
1999
- 1999-06-30 GR GR990401749T patent/GR3030663T3/el unknown

Also Published As

Publication number	Publication date
EP0719585A1 (de)	1996-07-03
DE4447321C2 (de)	1999-07-22
US5630557A (en)	1997-05-20
ATE181258T1 (de)	1999-07-15
DE59506233D1 (de)	1999-07-22
JPH08229419A (ja)	1996-09-10
CA2165886C (en)	2001-10-09
DE4447321A1 (de)	1996-07-04
DK0719585T3 (da)	1999-12-06
ES2135648T3 (es)	1999-11-01
CA2165886A1 (en)	1996-07-01
JP2929078B2 (ja)	1999-08-03
GR3030663T3 (en)	1999-10-29

Publication	Publication Date	Title
EP0719585B1 (de)	1999-06-16	Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen
EP1468739B1 (de)	2008-03-19	Rührwerkskugelmühle
EP2327479B1 (de)	2014-01-22	Rührwerkskugelmühle
EP3311922B1 (de)	2018-12-05	Rührwerkskugelmühle
DE1482391B1 (de)	1970-08-20	Ruehrwerksmuehle
DE2848479A1 (de)	1979-05-23	Ruehrwerkskugelmuehle
DE102013006405B3 (de)	2014-08-28	Vorrichtung zum Zerkleinern von Aufgabegut
DE2020649B2 (de)	1979-07-26	Rührwerksmühle zum Dispergieren von Festkörperteilchen in einem flüssigen Trager
WO1990007378A1 (de)	1990-07-12	Rührwerksmühle mit trennvorrichtung in einem rotierenden käfig
EP0700721B1 (de)	1999-11-24	Rührwerksmühle
DE102009020708A1 (de)	2010-11-18	Vorrichtung zum Zerkleinern von Aufgabegut
DE1782775B2 (de)	1974-07-18	Drehluftsichter. Ausscheidung aus: 1507683
EP0638365A2 (de)	1995-02-15	Verfahren und Vorrichtung zur Trennung eines feinkörnigen Feststoffes in zwei Kornfraktionen
DE3844380C1 (en)	1990-01-18	Agitator mill with separating device in a rotating cage
DE19819967A1 (de)	1999-11-11	Rührwerksmühle
EP0665059B1 (de)	1998-12-23	Rührwerkskugelmühle
EP2992960B1 (de)	2024-01-17	Vorrichtung zum zerkleinern von aufgabegut mit vorgeschalteter sichtung
EP1027161B1 (de)	2013-06-26	Verfahren und vorrichtung zum nassmahlen und dispergieren von feststoffpartikeln in flüssigkeiten
DE4425906C2 (de)	1997-02-06	Naßmahlsystem
DE3827558C2 (de)	1995-12-14	Verfahren und Vorrichtung zum Mahlen von als Suspension gefördertem Mahlgut
DE9420964U1 (de)	1995-03-23	Rührwerksmühle mit Separator zur Zurückhaltung von Mahlperlen
DE4326604C2 (de)	2003-02-27	Klassiervorrichtung
EP1043073A1 (de)	2000-10-11	Nassklassiereinrichtung mit integriertem Mahlwerk
DD140656A1 (de)	1980-03-19	Vorrichtung zum zurueckhalten der mahlkoerper in ruehrwerkskugelmuehlen
DE4408785A1 (de)	1995-09-21	Vorrichtung zum Naßklassieren

Legal Events

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