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EP0475015A1 - Procédé et appareil pour le broyage continu et la dispersion de solides dans des liquides - Google Patents

Procédé et appareil pour le broyage continu et la dispersion de solides dans des liquides Download PDF

Info

Publication number
EP0475015A1
EP0475015A1 EP91111672A EP91111672A EP0475015A1 EP 0475015 A1 EP0475015 A1 EP 0475015A1 EP 91111672 A EP91111672 A EP 91111672A EP 91111672 A EP91111672 A EP 91111672A EP 0475015 A1 EP0475015 A1 EP 0475015A1
Authority
EP
European Patent Office
Prior art keywords
zone
grinding
region
return
grinding zone
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
EP91111672A
Other languages
German (de)
English (en)
Other versions
EP0475015B1 (fr
Inventor
Gerhard Dipl.-Ing. Bühler
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.)
FrymaKoruma AG
Original Assignee
Fryma Maschinen 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 Fryma Maschinen AG filed Critical Fryma Maschinen AG
Publication of EP0475015A1 publication Critical patent/EP0475015A1/fr
Application granted granted Critical
Publication of EP0475015B1 publication Critical patent/EP0475015B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 5 for the continuous fine grinding and dispersing of solids in liquid.
  • DE-AS 1 223 236 describes an agitator mill in which, in addition to the agitator consisting of agitator disks, the outer grinding trough also rotates. However, the mass of the grinding media located in the grinding trough is thrown by the centrifugal forces onto the outer wall of the rotating grinding trough and can move essentially neither radially nor axially there. As a result, the grinding effect, in contrast to a device in which the mass of the grinding media circulates, is considerably less.
  • a device which contains a gap-shaped grinding zone, which is interspersed from its inlet side to its outlet side by a solid-liquid mixture and auxiliary grinding bodies. Furthermore, a return zone is provided which returns the grinding auxiliary bodies by centrifugal force from the outlet side to the inlet side of the grinding zone, at least a substantial part of the solid-liquid mixture being discharged via an outflow zone against the centrifugal force.
  • the entire flow space of the grinding zone and the outflow zone is delimited by an outer fixed wall and an inner circumferential wall.
  • the auxiliary grinding bodies are separated from the solid-liquid mixture by centrifugal force and are returned via the return zone to the inlet side of the grinding zone.
  • a certain proportion of the auxiliary grinding bodies with the solid-liquid mixture are dragged into the outflow zone.
  • the invention is based on the object of developing the method according to the preamble of claim 1 and the device according to the preamble of claim 5 such that the separation of the auxiliary grinding bodies from the solid-liquid mixture in the region of the flow space in which the return zone and connecting the outflow zone to the grinding zone is improved.
  • This object is achieved in that at least the walls of the flow space in which the return zone and the outflow zone connect to the grinding zone rotate in the same direction, but at different speeds.
  • the increase in centrifugal forces in the grinding zone also significantly improves the grinding effect.
  • This device essentially contains a gap-shaped grinding zone 1, which is penetrated from its inlet side 1 to its outlet side 1 by a solid-liquid mixture and by auxiliary grinding bodies. Furthermore, a return zone, designed as a return channel 2, which returns the auxiliary grinding bodies 18 by centrifugal force from the outlet side 1 b to the inlet side 1 a of the grinding zone 1, is provided.
  • the grinding zone 1 is connected on its inlet side 1a to an inflow zone 3, while an outlet zone 4 connects to the outlet side 1.
  • the grinding zone 1, the inflow zone 3 and the outflow zone 4 are delimited by the inner surface of an outer rotor 5 and the outer surface of an inner rotor 6, the outer and inner rotors 5, 6 having a common axis of rotation 7.
  • the outer and inner rotors 5, 6 are driven by pulleys 8, 9 in the same direction, but at different speeds.
  • the inflow zone 3 is connected via channels 10 to a feed pipe 11, the central axis of which coincides with the axis of rotation 7.
  • the outflow zone 4 is connected via channels 12 to a discharge pipe 13 arranged concentrically with the feed pipe 11.
  • the outer rotor 5 is surrounded by a cooling zone 14 which has a cooling water supply 14a and a cooling water discharge 14b.
  • the direction of flow of the cooling water is shown in FIG. 1 with the arrows 15.
  • the entire device is attached to a housing frame 16.
  • the return duct 2 runs obliquely outwards from the end face 6b of the inner rotor 6 facing the outlet side 1 of the grinding zone 1 to the end face 6a of the inner rotor facing the inlet side 1 of the grinding zone 1 6.
  • the angle which the return channel 2 forms with the axis of rotation 7 is between 10 to 70 °, preferably between 30 to 60 °.
  • the inflow zone 3, the grinding zone 1 and the adjoining part of the outflow zone 4 are designed in the form of an annular gap.
  • the return zone is formed by one or more return channels 2.
  • the inner rotor 6 accordingly has a wavy surface formation in the third region 1 of the grinding zone 1.
  • FIG. 6 shows a section through the outer rotor 5 along the line VI-VI of FIG.
  • the surface facing the outflow zone 4 also has a wavy surface configuration.
  • FIG. 3 shows a partial sectional view of a second exemplary embodiment.
  • the same reference numerals are used here for the same parts.
  • FIG. 4 shows a sectional partial view of a third exemplary embodiment.
  • This third exemplary embodiment differs from the second exemplary embodiment according to FIG. 3 essentially only in the configuration of its third region 1 "e, which extends at least approximately in the form of a circular arc and obliquely inwards.
  • the solid-liquid mixture is introduced into the inflow zone 3 from a pump (not shown) via the feed pipe 11.
  • the direction of flow of the solid-liquid mixture is shown by the arrows 17.
  • the solid-liquid mixture is mixed with auxiliary grinding bodies 18, which bring about continuous fine comminution and dispersion of the solids in the liquid in the grinding zone 1 to the outlet side 1.
  • the grinding media from the inlet side 1a to the outlet Page 1 taken and are then returned against the flow by centrifugal force from the outside 1 to the inlet side 1 of the grinding zone 1.
  • at least a substantial part of the solid-liquid mixture is discharged against the centrifugal force via the outflow zone 4.
  • the solution according to the invention results in a centrifugal force that is many times higher in that, in addition to the inner rotor 6, the outer rotor 5 is also driven in the same direction. If, for example, in the known version according to DE-OS 37 16 295 the rotor is driven at a speed of 1,500 rpm while the other wall of the grinding zone is stationary as a stator, the result is an average for the solid-liquid mixture with the auxiliary grinding bodies Rotation speed of 750 rpm.
  • the speeds of the rotors must also be adjusted to the mass of the auxiliary grinding bodies and the strength of the flow of the solid-liquid mixture.
  • it must be ensured that the auxiliary grinding bodies circulate in a kind of circulation in the grinding zone 1 and the return duct 2 and are not held in a region of the grinding zone with the greatest radial distance from the axis of rotation 7 by excessive centrifugal force.
  • the centrifugal force in particular in the return duct 2, must be so great that the auxiliary grinding bodies are separated from the latter against the flow of the solid-liquid mixture.
  • the speeds at which the two rotors 5, 6 - and thus also the walls of the flow space in which the return zone (return channel 2) and the outflow zone 4 connect to the grinding zone 1 - are expediently between 500 and 20,000 rpm, preferably between 1,000 and 5,000 rpm.
  • the difference in the peripheral speeds of the two walls delimiting the grinding zone 1 is expediently between 5 and 20 m / s, preferably between 8 and 15 m / s.
  • the size of the centrifugal forces in the flow space in which the return zone (return channel 2) and the outflow zone 4 connect to the grinding zone 1, or in the entire grinding zone 1, can be determined, on the one hand, by the speeds of the two rotors 5, 6 and, on the other hand, by the Set the constructive radial distance of these areas from the axis of rotation 7.
  • the auxiliary grinding bodies 18 are kept in constant motion, so that a good grinding effect is achieved.
  • This effect is additionally reinforced by surface profiling on the walls delimiting the grinding zone 1 and by the grinding zone 1 kinking several times at an acute or obtuse angle.
  • the diameter range of the auxiliary grinding bodies can be, for example, between 0.1 and 0.5 mm. Even with grinding aids of this size, the mass forces are so great that an effectively high grinding effect is achieved.
  • the solution according to the invention can also be realized in devices in which - similar to the design according to DE-OS 37 16 295 - several grinding zones (each provided with an inflow zone, outflow zone and return zone) are connected in series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
EP91111672A 1990-09-14 1991-07-12 Procédé et appareil pour le broyage continu et la dispersion de solides dans des liquides Expired - Lifetime EP0475015B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4029252A DE4029252A1 (de) 1990-09-14 1990-09-14 Verfahren und vorrichtung zum kontinuierlichen feinzerkleinern und dispergieren von feststoffen in fluessigkeit
DE4029252 1990-09-14

Publications (2)

Publication Number Publication Date
EP0475015A1 true EP0475015A1 (fr) 1992-03-18
EP0475015B1 EP0475015B1 (fr) 1994-06-22

Family

ID=6414292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111672A Expired - Lifetime EP0475015B1 (fr) 1990-09-14 1991-07-12 Procédé et appareil pour le broyage continu et la dispersion de solides dans des liquides

Country Status (6)

Country Link
EP (1) EP0475015B1 (fr)
JP (1) JPH0669539B2 (fr)
AT (1) ATE107543T1 (fr)
DE (2) DE4029252A1 (fr)
DK (1) DK0475015T3 (fr)
ES (1) ES2056528T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665059A1 (fr) * 1994-01-28 1995-08-02 HOSOKAWA ALPINE Aktiengesellschaft Broyeur agitateur à billes
WO2000007731A1 (fr) * 1998-08-06 2000-02-17 Bühler AG Procede et dispositif pour le broyage a l'etat mouille de solides dans des liquides
EP1155735A1 (fr) * 2000-05-18 2001-11-21 Inoue Mfg., Inc. Broyeur agitateur avec des perles de broyage pour des conduits
CN113289731A (zh) * 2021-05-20 2021-08-24 博亿(深圳)工业科技有限公司 一种多种分散速度的研磨系统及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101676298B1 (ko) * 2016-05-04 2016-11-15 주식회사 씨케이머티리얼즈랩 재분산성이 향상된 자기유변유체 평가방법
JP6919940B1 (ja) * 2020-06-22 2021-08-18 淺田鉄工株式会社 分散装置
JP6862020B1 (ja) * 2020-06-22 2021-04-21 淺田鉄工株式会社 分散システム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202364A (en) * 1961-11-03 1965-08-24 Holderbank Cement Method of and apparatus for grinding material
GB2016953A (en) * 1978-03-18 1979-10-03 Fryma Masch Ag Ball mill
DE3716295A1 (de) * 1987-05-15 1988-11-24 Fryma Maschinenbau Gmbh Spalt-kugelmuehle zum kontinuierlichen feinzerkleinern, insbesondere aufschliessen von mikroorganismen und dispergieren von feststoffen in fluessigkeit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD146394A1 (de) * 1979-10-15 1981-02-11 Robert Habel Vorrichtung zum intensiven vermischen feinkoerniger feststoffe mit fluessigkeiten
DD272039A1 (de) * 1987-05-11 1989-09-27 Nagema Veb K Einrichtung zur herstellung von feinteiligen dispersionen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202364A (en) * 1961-11-03 1965-08-24 Holderbank Cement Method of and apparatus for grinding material
GB2016953A (en) * 1978-03-18 1979-10-03 Fryma Masch Ag Ball mill
DE3716295A1 (de) * 1987-05-15 1988-11-24 Fryma Maschinenbau Gmbh Spalt-kugelmuehle zum kontinuierlichen feinzerkleinern, insbesondere aufschliessen von mikroorganismen und dispergieren von feststoffen in fluessigkeit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665059A1 (fr) * 1994-01-28 1995-08-02 HOSOKAWA ALPINE Aktiengesellschaft Broyeur agitateur à billes
US5590841A (en) * 1994-01-28 1997-01-07 Stein; Juergen Agitator ball mill
CN1051253C (zh) * 1994-01-28 2000-04-12 霍索卡瓦阿尔彼股份公司及两合公司 搅拌式球体碾磨机
WO2000007731A1 (fr) * 1998-08-06 2000-02-17 Bühler AG Procede et dispositif pour le broyage a l'etat mouille de solides dans des liquides
EP1155735A1 (fr) * 2000-05-18 2001-11-21 Inoue Mfg., Inc. Broyeur agitateur avec des perles de broyage pour des conduits
CN113289731A (zh) * 2021-05-20 2021-08-24 博亿(深圳)工业科技有限公司 一种多种分散速度的研磨系统及方法
CN113289731B (zh) * 2021-05-20 2023-07-18 博亿(深圳)工业科技有限公司 一种多种分散速度的研磨系统及方法

Also Published As

Publication number Publication date
DE59101995D1 (de) 1994-07-28
DE4029252A1 (de) 1992-03-19
JPH04247248A (ja) 1992-09-03
DK0475015T3 (da) 1994-11-07
ATE107543T1 (de) 1994-07-15
JPH0669539B2 (ja) 1994-09-07
EP0475015B1 (fr) 1994-06-22
ES2056528T3 (es) 1994-10-01

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