EP0719585B1 - Broyeur agitateur avec séparateur pour la rétention de perles de broyage - Google Patents

Broyeur agitateur avec séparateur pour la rétention de perles de broyage Download PDF

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Publication number
EP0719585B1
EP0719585B1 EP95119228A EP95119228A EP0719585B1 EP 0719585 B1 EP0719585 B1 EP 0719585B1 EP 95119228 A EP95119228 A EP 95119228A EP 95119228 A EP95119228 A EP 95119228A EP 0719585 B1 EP0719585 B1 EP 0719585B1
Authority
EP
European Patent Office
Prior art keywords
grinding
agitator
outlet
mill
separator
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.)
Revoked
Application number
EP95119228A
Other languages
German (de)
English (en)
Other versions
EP0719585A1 (fr
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
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6537543&utm_source=***_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.
Application filed by Omya GmbH filed Critical Omya GmbH
Publication of EP0719585A1 publication Critical patent/EP0719585A1/fr
Application granted granted Critical
Publication of EP0719585B1 publication Critical patent/EP0719585B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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 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 And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (8)

  1. Broyeur à agitateur, dont la cuve de broyage (1), munie d'une entrée (4) et d'une sortie (21) et remplie d'une charge de perles de broyage (5), reçoit un arbre de malaxage (2) rotatif muni d'organes de malaxage (3), sur lequel est situé un séparateur (6 à 14) devant la sortie pour retenir les perles de broyage, qui est muni de fentes radiales,
    qui se trouvent entre une chambre circulaire (7) radialement extérieure appartenant à la chambre de broyage, et une chambre de sortie (18) intérieure circulaire entourant l'arbre de malaxage,
    caractérisé en ce que,
    le séparateur est constitué d'un rotor à la manière d'un rotor de séparateur à force centrifuge (6), dans lequel les ouvertures sont constituées par les chambres intermédiaires ou chambres de séparation entre chacune des deux pales (10) du rotor de séparateur.
  2. Broyeur à agitateur selon la revendication 1,
    caractérisé en ce que,
    le rotor de séparateur (6) est disposé dans une partie supérieure (8) de la cuve de broyage (1) au diamètre élargi ou dans une pièce élargie rapportée sur le carter.
  3. Broyeur à agitateur, dont la cuve de broyage, munie d'une entrée et d'une sortie et remplie d'une charge de perles de broyage, reçoit un arbre de malaxage rotatif muni d'organes de malaxage,
    dans lequel il est prévu sur le côté sortie de la cuve de broyage un dispositif pour retenir les perles de broyage, caractérisé en ce que,
    dans une partie supérieure (8) de la cuve de broyage (1) au diamètre élargi ou dans une pièce élargie rapportée sur le carter, il est prévu au moins un rotor de séparation (6) actionnable séparément pour retenir les perles de broyage.
  4. Broyeur à agitateur selon la revendication 3,
    caractérisé en ce que,
    un rotor de séparation (6) tourne par l'intermédiaire d'un palier sur l'arbre de malaxage (2) et est actionné par l'arbre de malaxage grâce à une commande séparée ou une transmission ou similaire.
  5. Broyeur à agitateur selon une des revendications 1 à 4,
    caractérisé en ce que,
    il est prévu sur le côté sortie du rotor de séparation une chambre de détente et de collecte de vapeur (28) munie d'une sortie de vapeur (29), pour capter et évacuer la vapeur d'eau produite derrière la pale (10) du rotor, en raison de la chute de pression.
  6. Circuit de broyage avec au moins un broyeur à agitateur selon une des revendications 1 à 5,
    caractérisé en ce que,
    la sortie (21) des matières fines du broyeur à agitateur est reliée à un dispositif de séparation (30) centrifuge ou similaire, dont la sortie des matières grosses (31) est reliée à l'entrée (4) du broyeur à agitateur, tandis que la sortie des matières fines (32) de celui-ci délivre le produit final de matières fines.
  7. Broyeur à agitateur de préférence selon une des
    revendications 1 à 5,
    caractérisé en ce que,
    il est prévu sur la bague avant supérieure (12) du rotor de séparation (6) une couronne de bâtonnets (16) se déployant radialement en guise de joint face à une paroi (17) circulaire supérieure de la cuve de broyage (1).
  8. Broyeur à agitateur selon la revendication 7,
    caractérisé en ce que,
    il est prévu, en guise de joint entre l'arbre de l'agitateur (2) et le couvercle supérieur (20) du carter, une couronne de bâtonnets radiaux (23), qui sont disposés sur une bague support (22) entourant l'arbre.
EP95119228A 1994-12-31 1995-12-06 Broyeur agitateur avec séparateur pour la rétention de perles de broyage Revoked EP0719585B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6537543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95119228A Revoked EP0719585B1 (fr) 1994-12-31 1995-12-06 Broyeur agitateur avec séparateur pour la rétention de perles de broyage

Country Status (9)

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

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US5797550A (en) * 1994-04-11 1998-08-25 Mount Isa Mines Limited Attrition mill
US5984213A (en) * 1994-04-11 1999-11-16 Mount Isa Mines Limited Attrition mill
EP0771591A4 (fr) * 1995-06-06 2000-05-31 Kotobuki Giken Kogyo Kk Broyeur humide d'agitation a billes et procede
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
EP1971439A2 (fr) * 2005-06-08 2008-09-24 Cheshire Dispersion Company Limited Appareil de broyage
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
WO2012123347A2 (fr) * 2011-03-11 2012-09-20 Willy A. Bachofen Ag Broyeur à billes agité
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
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
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
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***
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
CN108405087A (zh) * 2018-03-13 2018-08-17 陈丽专 一种生物反应和生物分离装置
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
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***及制备方法
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

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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
JPH043630Y2 (fr) * 1987-01-23 1992-02-04
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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

Also Published As

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

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