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EP0087040A2 - Séparateur vibrant pour broyeur agitateur à bulles - Google Patents

Séparateur vibrant pour broyeur agitateur à bulles Download PDF

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Publication number
EP0087040A2
EP0087040A2 EP19830101113 EP83101113A EP0087040A2 EP 0087040 A2 EP0087040 A2 EP 0087040A2 EP 19830101113 EP19830101113 EP 19830101113 EP 83101113 A EP83101113 A EP 83101113A EP 0087040 A2 EP0087040 A2 EP 0087040A2
Authority
EP
European Patent Office
Prior art keywords
separating device
frame
trough
sieve
separating
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.)
Withdrawn
Application number
EP19830101113
Other languages
German (de)
English (en)
Inventor
Asterios Dipl.-Ing. Moutsokapas
Claus Dipl.-Ing. Gösling
Hans-Heinz Dr. Mölls
Klaus Dipl.-Ing. Schubert
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of EP0087040A2 publication Critical patent/EP0087040A2/fr
Withdrawn legal-status Critical Current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

  • the invention relates to a separating device on an agitator ball mill for separating grinding media and ground suspension, wherein the separating device can be attached to the trough casing or on the trough end wall of the agitator ball mill and is designed as a sieve.
  • German Auslegeschrift 24 46 341 it is proposed to use a separating device with a vibrator, in which at least one separating member can be set in vibration motion.
  • the separating device consists of one or more gaps arranged side by side or one behind the other. Annular gaps are particularly preferred. Although this separation device reduces the flow resistance, it is relatively complex and prone to failure and has a low output.
  • the object of the invention is a maintenance-friendly, fault-prone, high-performance separating device, with which small grinding media in particular can also be separated.
  • the object is achieved in that the sieve is held by a frame, the frame is elastically sealed to the trough jacket or to the trough end wall and a vibration device is provided with which the frame can be excited to vibrate.
  • a flat screen is clamped in the frame; in another advantageous embodiment, the screen area is larger than the free frame cross section.
  • the frame can be designed so that the screen surface protrudes into the trough or the screen surface lies within the trough wall.
  • the frequency and / or the amplitude of the vibration device can be changed.
  • certain vibration modes on the frame are excited with the sieve, for example rectilinear, circular, elliptical movements. It is particularly advantageous to excite the frame into three-dimensional vibrations.
  • grinding media with diameters of 1 mm down to about 50 pm can be separated.
  • support and protection plates With the help of support and protection plates, a wide variety of screen surfaces can be created.
  • the separating device can be easily and quickly adapted to a wide variety of tasks (material, hole size).
  • the screen surface in the separating device can be arranged so that a direct impact of grinding media on the screen is avoided.
  • a three-dimensional movement of the vibrating sieve is particularly advantageous because the grinding elements are transported away from the sieve surface and mixed with the remaining contents of the grinding container. This means that there is no concentration of grinding media in front of the sieve.
  • separating devices Due to a larger free screen area, a high throughput with minimal pressure drop is possible.
  • the passage based on the frame size, is larger by a factor of 10 or more.
  • a throughput of 20 l / h can be achieved with a lifting separator according to the prior art under a pressure of 2.5 bar in the grinding chamber.
  • a vibrating screen of the appropriate size creates a throughput of 130 l / h with a pressure drop of 0.1 bar under otherwise identical conditions.
  • the performance limit of the separating device had not yet been reached because the throughput was limited by the grinding capacity of the mill.
  • the separating surface of the device according to the invention is significantly smaller than in the case of screen cartridges according to the prior art
  • the vibrating sieve surfaces ensure that the suspension is transported away safely. With other separating devices, backflow and thus an increase in pressure is unavoidable with structurally viscous products. In experiments with dispersions of organic pigments, the strongly thixotropic product flowed cleanly out of the vibrating sieve.
  • the vibrating screens can be attached to the grinder so that they are always washed by the product. This prevents dispersions from drying out in the sieve area.
  • the sieve should be protected against the direct impact of the grinding media. If the sieve plate is parallel to the flow, the so-called sandblasting effect is excluded. In the case of arrangements of the screen, as is shown by way of example in the drawing, the wear due to abrasion or impact is largely reduced.
  • the separating device is simple, inexpensive, reliable and easy to maintain.
  • the screen is changed by loosening a few screws.
  • the vibrations of the frame can be caused by unbalance motors, can be excited by compressed air-powered rotating steel balls, by electromagnets or by ultrasonic generators.
  • the frequency and amplitude of the vibration is influenced by the design of the separating element and the design of the vibrator. It is useful if the frequency and amplitude of the vibrator can be controlled.
  • Fig. 1 shows a separating device on the trough wall of an agitator mill.
  • the separating element is a vibrating flat sieve 1, usually with sieve openings between 50 and 1000 pm.
  • the sieve 1 is supported on the perforated plate 2.
  • the strainer plate is fastened to the flange 4 with the clamping ring 3.
  • the screen plate 1 does not protrude into the product space 5 on the trough wall 6.
  • the frame 7, which holds the sieve 1 by fastening with the flange 4, is correspondingly matched to the size of the opening on the lid of the agitator mill.
  • the Suspension exits via the drain housing 8 and the product outlet connection 9.
  • the separator With the membrane 13, the separator is attached to the wall of the trough and through it the product space is sealed and the oscillation of the sieve 1 is made possible.
  • a ball vibrator 10 compressed air connection 11, muffler 12
  • a spring bar 14 is adjusted in length and diameter so that the frame 7 with the screen 1 is set by the vibrator 10 in the desired vibration mode.
  • a separator is attached to the jacket side of an agitator mill. Parts with the same function have the same reference numerals as in Fig. L.
  • the flange 4 here has the shape of a circular cylinder which is adapted to the inside contour of the trough on the side facing the inside of the agitator mill.
  • the sieve plate 1 is essentially parallel to the flow in the product space. It is also possible to design the chamber 15 as a straight circular cylinder, which is covered with the sieve plate at the bottom. The less the sieve 1 extends into the product space 5, the better it is protected against the direct impact of the grinding media.
  • the screen surface is larger than the frame cross section.
  • the parts with the same function are identified by the same reference numerals as in FIGS. 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP19830101113 1982-02-19 1983-02-07 Séparateur vibrant pour broyeur agitateur à bulles Withdrawn EP0087040A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823206104 DE3206104A1 (de) 1982-02-19 1982-02-19 Vibrationstrennsieb an ruehrwerks-kugelmuehlen
DE3206104 1982-02-19

Publications (1)

Publication Number Publication Date
EP0087040A2 true EP0087040A2 (fr) 1983-08-31

Family

ID=6156236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830101113 Withdrawn EP0087040A2 (fr) 1982-02-19 1983-02-07 Séparateur vibrant pour broyeur agitateur à bulles

Country Status (3)

Country Link
EP (1) EP0087040A2 (fr)
JP (1) JPS58153545A (fr)
DE (1) DE3206104A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729788A1 (fr) * 1995-02-28 1996-09-04 Eastman Kodak Company Procédé et dispositif empéchant le bouchage du séparateur dans une machine à broyage humide
CN114130504A (zh) * 2021-12-01 2022-03-04 徐州宏武纳米科技有限公司 一种氧化镓单晶用研磨装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6603266B1 (en) 1999-03-01 2003-08-05 Lg Electronics Inc. Flat-panel display
US6459201B1 (en) 1999-08-17 2002-10-01 Lg Electronics Inc. Flat-panel display with controlled sustaining electrodes
US6597120B1 (en) 1999-08-17 2003-07-22 Lg Electronics Inc. Flat-panel display with controlled sustaining electrodes
US6825606B2 (en) 1999-08-17 2004-11-30 Lg Electronics Inc. Flat plasma display panel with independent trigger and controlled sustaining electrodes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729788A1 (fr) * 1995-02-28 1996-09-04 Eastman Kodak Company Procédé et dispositif empéchant le bouchage du séparateur dans une machine à broyage humide
CN114130504A (zh) * 2021-12-01 2022-03-04 徐州宏武纳米科技有限公司 一种氧化镓单晶用研磨装置

Also Published As

Publication number Publication date
DE3206104A1 (de) 1983-09-01
JPS58153545A (ja) 1983-09-12

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830207

AK Designated contracting states

Designated state(s): CH DE FR GB LI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840204

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOUTSOKAPAS, ASTERIOS, DIPL.-ING.

Inventor name: MOELLS, HANS-HEINZ, DR.

Inventor name: GOESLING, CLAUS, DIPL.-ING.

Inventor name: SCHUBERT, KLAUS, DIPL.-ING.