EP0019834A1 - Procédé de désaération d'une matière à broyer visqueuse - Google Patents

Procédé de désaération d'une matière à broyer visqueuse Download PDF

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Publication number
EP0019834A1
EP0019834A1 EP80102784A EP80102784A EP0019834A1 EP 0019834 A1 EP0019834 A1 EP 0019834A1 EP 80102784 A EP80102784 A EP 80102784A EP 80102784 A EP80102784 A EP 80102784A EP 0019834 A1 EP0019834 A1 EP 0019834A1
Authority
EP
European Patent Office
Prior art keywords
grinding
vacuum
agitator
regrind
agitator mill
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
Application number
EP80102784A
Other languages
German (de)
English (en)
Other versions
EP0019834B1 (fr
EP0019834B2 (fr
Inventor
Herbert Dürr
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.)
Draiswerke GmbH
Original Assignee
Draiswerke 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6071757&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019834(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Draiswerke GmbH filed Critical Draiswerke GmbH
Priority to AT80102784T priority Critical patent/ATE1601T1/de
Publication of EP0019834A1 publication Critical patent/EP0019834A1/fr
Publication of EP0019834B1 publication Critical patent/EP0019834B1/fr
Application granted granted Critical
Publication of EP0019834B2 publication Critical patent/EP0019834B2/fr
Expired 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

Definitions

  • the invention relates to a method according to the preamble of patent claim 1, the use of an agitator mill according to patent claim 4 and an agitator mill according to patent claim 5.
  • the agitator mill has a separating device consisting of a cylinder sieve which retains the auxiliary grinding bodies located in the grinding chamber of the agitator mill.
  • a storage container upstream of the mill and a collecting container downstream of the agitator mill are each subjected to a vacuum.
  • the grinding chamber of the mill itself can be subjected to a vacuum.
  • This known configuration is not functional, since the grinding material foams up due to the vacuum applied to the grinding chamber and the auxiliary grinding bodies are thereby washed up, which clog the vacuum line itself. If, on the other hand, vacuum is applied only from the collecting container, then only a very small amount of air is removed from the regrind.
  • a dispersing and homogenizing unit to a heatable mixing tank and to connect a vacuum ventilation system downstream.
  • This consists of a container in the form of a cone standing on top, into which a line coming from the mixing tank opens.
  • the viscous material fed through this line is placed on a high-speed driven centrifugal disc, which sprays the material in a relatively finely divided manner.
  • the container is subjected to negative pressure via a vacuum line.
  • a discharge purge is connected to the lower end of the container.
  • the invention has for its object to achieve a particularly simple ventilation of viscous regrind.
  • the agitator mill shown in the drawing has in the usual way a stand 1, on the top of which a projecting support arm 2 is attached, to which in turn a cylindrical grinding container 3 is attached.
  • an electric drive motor 4 is housed, which is provided with a V-belt pulley 5, of which via wedge Belt 6 a V-belt pulley 8 which is connected in a rotationally fixed manner to an agitator 7 can be driven in rotation.
  • the grinding container 3 has a cooling jacket 9, which is delimited by a cylindrical inner wall 10 and a cylindrical outer wall 12 arranged concentrically to the central longitudinal axis 11 of the grinding container 3.
  • the inner wall 10 and the outer wall 12 are connected to one another at the top and bottom by end rings 13, 14.
  • a cooling water connection 15 opens at the bottom and a cooling water outlet 16 at the top.
  • the grinding container 3 is closed at its lower end by a base plate 17 which is fastened, for example, by means of screws 18 to the lower end of the cooling jacket in the end ring 13.
  • On the base plate 17 there is a feed stock 19 through which the regrind can be pumped from below into the grinding chamber 20 of the grinding container 3.
  • the agitator 7, which is arranged concentrically to the central longitudinal axis 11, consists of an agitator shaft 21, on which discs 22 which are concentrically and non-rotatably project radially. Spacers 23 are attached between adjacent disks 22. On the outer circumference of each disk 22, several stirring rods 24 are attached, projecting radially.
  • Objects 25 projecting radially into the grinding chamber 20 are attached to the cylindrical inner wall 10 of the grinding container 3 and are arranged axially such that they always lie between two axially adjacent stirring rods 24.
  • the structure of this agitator 7 as a hollow, coolable agitator and the design of the counter rods 25 is shown and described in detail in DE-OS 26 29 251 (corresponding to US Pat. No. 4,129,261), which can be referred to for information purposes.
  • the grinding chamber 20 is moved upwards by a separating device 26 which consists of an annular disk 28 attached to the agitator shaft 21 in a rotationally fixed manner by means of a feather key connection 27 and a stationary counter ring 29 arranged concentrically thereto.
  • This counter ring 29 is screwed onto the upper end of the cooling jacket 9 by means of screws 30.
  • This counter ring 29 also serves as a connecting flange for fastening a cover 31 by means of screws 32.
  • This cover includes a discharge space 33, from which a regrind nozzle 34 opens.
  • the agitator shaft 21, which is guided through the discharge space 33, is sealed through the cover 31 by means of a stuffing box 35, which is only indicated.
  • the connection between the cover 31 and the grinding container 3 is also gas and liquid tight.
  • a collecting container 37 which can be moved on rollers 36 is displaceably arranged on the bottom 38 and is closed in a gastight and liquid-tight manner by a removable cover 39.
  • the regrind outlet connection 34 is connected to this collecting container 37 via a transfer line 40 which opens into the cover 39.
  • a sight glass 41 can be fitted in the cover 39.
  • a vacuum line 42 opens into the discharge space 33, through which a corresponding negative pressure can be generated and maintained.
  • a vacuum line 43 for example attached to the cover 39, can be provided, through which a corresponding negative pressure can be generated and maintained in the collecting container 37. Due to the connection of the discharge space 33 with the collecting container 37 via the transfer line 40, the vacuum propagates anyway from the discharge space 33 to the collecting container 37 or vice versa.
  • the grinding chamber 20 is 50 to 70% of its size in the usual way free volume filled with auxiliary grinding bodies 44, only one of which is shown in the enlarged partial section of FIG. 3.
  • auxiliary grinding bodies 44 are retained by the separating device 26 in the grinding chamber 20, specifically in that the separating gap 45 between the annular disk -28 rotating with the agitator shaft 21 and the mating ring 29 fixedly connected to the grinding container 3 at its narrowest - facing the grinding chamber 20 Place has a width a, which is smaller than the diameter d of the smallest grinding aid body 44 located in the grinding container 3, so that no grinding aid bodies 44 can get into the discharge space 33 through this separation gap 45.
  • FIG. 2 and in particular from FIG.
  • the separating gap boundary surfaces 46, 47 on the annular disk 28 on the one hand and on the counter ring 29 on the other hand are inclined radially outwards from the grinding chamber 20, ie they have a radial directional component, and a radially outward directional component.
  • the separating gap limiting surface 47 formed on the counter ring is inclined somewhat more than the separating gap limiting surface 46 formed on the annular disk 28, so that the separating gap 45 widens from the grinding chamber 20 to the discharge chamber 33.
  • the narrowest gap width a is primarily adapted to the auxiliary grinding bodies 44, but it is in any case so narrow that the vacuum from the discharge space 33 does not spread into the grinding space 20, since a vacuum in the grinding space would lead to air being released during the grinding escapes from the regrind. Such an air passage would affect the grinding.
  • the regrind that emerges from the grinding chamber 20 after grinding into the discharge chamber 33 is simultaneously subjected to high shear forces between the separating gap boundary surfaces 46 and 47 moving against one another and at the same time is subjected to negative pressure from the narrowest point facing the grinding chamber 20 increases in width a toward the upper end of the separation gap 45 facing the discharge space 43.
  • the regrind is also discharged from this separation gap in the form of an atomizing ring film, the particles of which are then deaerated under vacuum in the discharge chamber.
  • the regrind which is usually color, is therefore subjected to extremely favorable ventilation.
  • the ratio of a / d is usually 1/3 to 1/2.
  • the widening of the separation gap 45 from the narrowest point facing the grinding chamber 20 with the width a to the furthest side facing the discharge chamber 33 is 10a to 20a.
  • the length of the separation gap 45 from the narrowest to the widest point is about 20 to 70 mm.
  • the excellent venting effect is essentially due to the fact that the air bubbles present in the ground material burst when they emerge from the separation gap 45.
  • the proportion of air in the regrind is extremely high, because the color or pigment contains an extremely large amount of air due to its production.
  • air is additionally sucked into the ground material and dispersed therein.
  • the agitator mill not only the color, i.e. H. the pigment is finely dispersed in its binder or solvent, but that the air present is also finely dispersed here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Disintegrating Or Milling (AREA)
  • Degasification And Air Bubble Elimination (AREA)
EP80102784A 1979-05-26 1980-05-20 Procédé de désaération d'une matière à broyer visqueuse Expired EP0019834B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102784T ATE1601T1 (de) 1979-05-26 1980-05-20 Verfahren zum entlueften von viskosem mahlgut, verwendung einer ruehrwerksmuehle zur durchfuehrung des verfahrens und ruehrwerksmuehle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792921408 DE2921408A1 (de) 1979-05-26 1979-05-26 Verfahren zum entlueften von viskosem mahlgut, verwendung einer ruehrwerksmuehle zur durchfuehrung des verfahrens und ruehrwerksmuehle
DE2921408 1979-05-26

Publications (3)

Publication Number Publication Date
EP0019834A1 true EP0019834A1 (fr) 1980-12-10
EP0019834B1 EP0019834B1 (fr) 1982-09-29
EP0019834B2 EP0019834B2 (fr) 1986-05-14

Family

ID=6071757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102784A Expired EP0019834B2 (fr) 1979-05-26 1980-05-20 Procédé de désaération d'une matière à broyer visqueuse

Country Status (5)

Country Link
US (1) US4382557A (fr)
EP (1) EP0019834B2 (fr)
JP (1) JPS55157339A (fr)
AT (1) ATE1601T1 (fr)
DE (2) DE2921408A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549552A1 (fr) * 1991-12-20 1993-06-30 Sala International AB Procédé et dispositif pour moudre fin des mineraux

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106062A1 (de) * 1981-02-19 1982-09-09 Draiswerke Gmbh, 6800 Mannheim Ruehrwerksmuehle
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−
JPS59102452A (ja) * 1982-11-30 1984-06-13 大久保　敏之 竪型ボ−ルミル
JPS6111162A (ja) * 1984-06-26 1986-01-18 川崎重工業株式会社 竪型媒体撹拌式微粉砕機
JPS6129842U (ja) * 1984-07-24 1986-02-22 三井三池化工機株式会社 乾式メデイア撹拌型粉砕機
JPS63118950U (fr) * 1987-01-26 1988-08-01
JPS63122642U (fr) * 1987-01-30 1988-08-09
JP2637450B2 (ja) * 1988-01-18 1997-08-06 キヤノン株式会社 バツチ式湿式分散装置およびそれを用いた電子写真感光体塗工液の分散方法
DE68926105T2 (de) * 1988-06-10 1996-08-22 Kubota Ltd Vorrichtung und verfahren zum mahlen und pulverisieren
JPH02160059A (ja) * 1988-12-13 1990-06-20 Yasuyuki Ogawa 粉砕機
GB0125497D0 (en) * 2001-10-24 2001-12-12 Colormatrix Europe Ltd Apparatus and method for delivering fluent colourant material
US8454000B2 (en) * 2005-05-17 2013-06-04 Robert J. Galletta, JR. Method and apparatus for controlled aeration of liquid medium in a pipe
US9084973B2 (en) 2005-05-17 2015-07-21 Robert J. Galletta, JR. Methods and apparatus for aeration of liquid medium and vectoring flow control
US9216920B2 (en) 2005-05-17 2015-12-22 Robert J. Galletta, JR. Methods and apparatus for controlled scrubbing and aeration of liquid medium
US7427058B2 (en) * 2005-05-17 2008-09-23 Galletta Jr Robert J Method and apparatus for aeration of liquid medium
US9266759B2 (en) 2005-05-17 2016-02-23 Robert J. Galletta Methods and apparatus for aeration of liquid medium and liquid medium treatment system
US8096531B2 (en) * 2005-05-17 2012-01-17 Galletta Robert J Method and apparatus for aeration of liquid medium in a pipe
US8191869B2 (en) * 2005-05-17 2012-06-05 Galletta Aerator, LLC Method and apparatus for submersible or self contained aeration of liquid medium
PL2272591T3 (pl) * 2009-07-06 2014-02-28 Bachofen Willy A Ag Młyn kulowy z mieszadłem
US9764329B2 (en) * 2013-01-15 2017-09-19 Aaron Engineered Process Equipment, Inc. Rotary mill
DE102013006405B3 (de) * 2013-04-13 2014-08-28 Pallmann Maschinenfabrik Gmbh & Co. Kg Vorrichtung zum Zerkleinern von Aufgabegut
CN103394213A (zh) * 2013-07-09 2013-11-20 哈尔滨工程大学 一种旋叶式小型气泡分离装置
US11465154B2 (en) 2015-07-28 2022-10-11 Outotec (Finland) Oy Grinding mills
CN113842729B (zh) * 2021-09-24 2022-11-25 南京利卡维智能科技有限公司 一种多轴研磨机用真空抽取机构及其真空研磨方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1607480A1 (de) * 1968-01-08 1969-10-16 Draiswerke Gmbh Mahlverfahren fuer Ruehrwerksmuehlen sowie zugehoerige Muehle
DE1482391B1 (de) * 1964-06-20 1970-08-20 Draiswerke Gmbh Ruehrwerksmuehle
DE1507528B1 (de) * 1966-12-06 1970-09-24 Fryma Masch Ag Vorrichtung zum Verarbeiten und Aufbereiten fliessfaehiger Produkte
DE1482393A1 (de) * 1964-10-28 1970-12-23 Draiswerke Gmbh Ruehrwerksmuehle
DE2323733A1 (de) * 1973-05-10 1974-11-28 Spangenberg Maschf G Ruehrwerksmuehle mit vorrichtung zum evakuieren des mahlgutes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695755A (en) * 1951-01-02 1954-11-30 John J Denovan Method and apparatus for disintegrating raw materials
JPS5250769Y2 (fr) * 1973-08-23 1977-11-17
DE2629251A1 (de) * 1976-06-30 1978-01-12 Draiswerke Gmbh Ruehrwerksmuehle
CH618893A5 (fr) * 1977-04-29 1980-08-29 Buehler Ag Geb
US4273295A (en) * 1979-04-04 1981-06-16 Gebruder Netzsch, Maschinenfabrik Gmbh & Co. Agitator mill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1482391B1 (de) * 1964-06-20 1970-08-20 Draiswerke Gmbh Ruehrwerksmuehle
DE1482393A1 (de) * 1964-10-28 1970-12-23 Draiswerke Gmbh Ruehrwerksmuehle
DE1507528B1 (de) * 1966-12-06 1970-09-24 Fryma Masch Ag Vorrichtung zum Verarbeiten und Aufbereiten fliessfaehiger Produkte
DE1607480A1 (de) * 1968-01-08 1969-10-16 Draiswerke Gmbh Mahlverfahren fuer Ruehrwerksmuehlen sowie zugehoerige Muehle
DE2323733A1 (de) * 1973-05-10 1974-11-28 Spangenberg Maschf G Ruehrwerksmuehle mit vorrichtung zum evakuieren des mahlgutes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549552A1 (fr) * 1991-12-20 1993-06-30 Sala International AB Procédé et dispositif pour moudre fin des mineraux
US5361996A (en) * 1991-12-20 1994-11-08 Sala International Ab Method and arrangement for finely-grinding minerals

Also Published As

Publication number Publication date
JPS55157339A (en) 1980-12-08
US4382557A (en) 1983-05-10
DE3060896D1 (en) 1982-11-11
JPS6329590B2 (fr) 1988-06-14
EP0019834B1 (fr) 1982-09-29
ATE1601T1 (de) 1982-10-15
EP0019834B2 (fr) 1986-05-14
DE2921408A1 (de) 1980-11-27

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