EP0888818A1 - Procédé et dispositif de broyage à jet à lit fluidisé - Google Patents

Procédé et dispositif de broyage à jet à lit fluidisé Download PDF

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Publication number
EP0888818A1
EP0888818A1 EP98110759A EP98110759A EP0888818A1 EP 0888818 A1 EP0888818 A1 EP 0888818A1 EP 98110759 A EP98110759 A EP 98110759A EP 98110759 A EP98110759 A EP 98110759A EP 0888818 A1 EP0888818 A1 EP 0888818A1
Authority
EP
European Patent Office
Prior art keywords
gas
steam
jet
regrind
bed
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Withdrawn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
EP98110759A
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German (de)
English (en)
Inventor
Dieter Dr.-Ing. Schwechten
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.)
Hosokawa Alpine AG
Original Assignee
Hosokawa Alpine 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 Hosokawa Alpine AG filed Critical Hosokawa Alpine AG
Publication of EP0888818A1 publication Critical patent/EP0888818A1/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Withdrawn legal-status Critical Current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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/06—Jet mills
    • B02C19/068—Jet mills of the fluidised-bed type

Definitions

  • the invention relates to the process of fluidized bed jet grinding, in which a high velocity gas or steam jet emerging from a nozzle in a fluidized bed of granular material is introduced.
  • the particles in the The area around the beam is at such a high speed accelerates that when impacting on resting or flying particles burst.
  • Such a method is e.g. already through DE-PS 5 98 421 known.
  • the solution there provides for the pulse exchange between gas or Steam jet and the granular material improve by using in the areas low jet pulse immediately after the jet emerges from the nozzle Flow channels are created transversely to the direction of flow of the jet have a pressure gradient from the environment to the core region of the jet, so that the particles of the ground material are sucked up to the blasting center and then on the impact speed required for their comminution are accelerated.
  • a disadvantage of the known methods is that the particles of the millbase initially have a low kinetic energy and only through the gas or Steam jet of high kinetic energy can be accelerated. Do this due to the inertia of the particles large differential speeds between the Gas or steam jet and the particles of the regrind that have not yet been accelerated on. A high slip is to be expected with particle acceleration, the turbulent flow losses. These are flow losses based on economical, inexpensive shredding with as much as possible low energy consumption is a disadvantage.
  • Remedy is the alignment of a particle beam against a solid obstacle (Target). This ensures that every accelerated particle collides is exposed.
  • a method is described in DE 27 38 980 A1 described.
  • the disadvantage here is the high wear on the fixed baffle plate (target).
  • the essence of the invention is thus to take advantage of particle acceleration Jet pipes (low turbulent flow losses) for efficient and make wear-free shredding usable in fluid bed jet mills.
  • the invention is therefore based on the task of reducing the efficiency of the comminution to increase the jet grinding in the fluidized bed in that the turbulent Flow losses due to the large differential speeds between the Gas or steam jet and the particles of the regrind are minimized. So flow losses should be as small as possible despite high particle loading Gas or steam jets can be realized.
  • the object is achieved in that the gas or steam jets accelerated together with a part of the ground material to be ground and into one fluidized bed of regrind can be introduced.
  • a beam optimally loaded in the manner according to the invention can exit interact with the surrounding fluid bed from the nozzle. This Interaction with the surrounding fluid bed in the form of particle collisions and a further entry of particles into the beam occurs below lower flow losses and leads to better energy utilization of the particle beam.
  • the particles accelerated with little energy expenditure can one be subjected to intimate impact loads in the fluidized bed. Take it all particles, both particles of the acceleration from the jet pipes, as well accelerated particles from the fluidized bed participate in the crushing.
  • An advantageous variant of the invention provides the use of parts of the Grist from the lower part of the fluid bed of the jet mill as feed Particle acceleration together with the gas or steam jet. This is particularly cheap, because of the classifying effect of the fluid bed, there especially coarse and / or heavy particles. Such heavy ones Particles are insufficient in one within the fluid bed jet mill Feeding in and accelerating free jet should therefore be preferred accelerated together with the gas or steam jet.
  • FIG. 1 shows a preferred embodiment of a plant for carrying out the method according to the invention and is described in more detail below.
  • the regrind to be crushed is added to task 1 .
  • the ground material can optionally consist of fresh feed material, which are made through hopper 2 and the feed screw 3 is added at a controlled rate or coarse material, that the fluidized-bed counter jet mill 5 is withdrawn from the lower part of the fluidized bed. 4
  • fresh feed material and recycled regrind from the fluidized bed 4 can be mixed and fed in variable proportions.
  • the ratio of the addition quantities via the metering screw 3 and screw conveyor 6 is regulated by the mutually independent motors 7 and 8, which can be controlled in terms of their speed.
  • the regrind in the feed 1 is fed to the pressure chamber 11 via a lock system consisting of the pressure-tight slides 9 and 10 and the lock chamber 22 .
  • the lock chamber 22 is subject to a pressure swing operation via the controllable valves 23 and 24 of the pressure connection 21 and the expansion line 20th
  • An overpressure screw conveyor 12 serves as a conveying device for the feed material within the pressure range and, by regulating the screw speed via the motor 13, enables the proportion of the regrind to be metered into the gas or steam flow.
  • the loading ratio is in the range of 0.5 to 5.0 kg of regrind per kg of gas or steam mass flow.
  • the ground material which is introduced via the grinding gas inlet 17 and is under pressure is dispersed in the grinding gas or grinding steam in the mixing chamber 14 and fed to the fluidized bed counter-jet mill 5 via the jet pipes 15 .
  • the particle-laden high-pressure jet is expanded into the fluidized bed counter-jet mill 5 through the nozzles 16 directly into the fluidized bed 4 .
  • the fines produced during comminution leave the mill and the circuit via the fines outlet 18 of the classifier 19 .

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
EP98110759A 1997-07-03 1998-06-12 Procédé et dispositif de broyage à jet à lit fluidisé Withdrawn EP0888818A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19728382A DE19728382C2 (de) 1997-07-03 1997-07-03 Verfahren und Vorrichtung zur Fließbett-Strahlmahlung
DE19728382 1997-07-03

Publications (1)

Publication Number Publication Date
EP0888818A1 true EP0888818A1 (fr) 1999-01-07

Family

ID=7834500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98110759A Withdrawn EP0888818A1 (fr) 1997-07-03 1998-06-12 Procédé et dispositif de broyage à jet à lit fluidisé

Country Status (4)

Country Link
US (1) US5992773A (fr)
EP (1) EP0888818A1 (fr)
JP (1) JPH1170340A (fr)
DE (1) DE19728382C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1808231A1 (fr) * 2006-01-14 2007-07-18 Josef Fischer Séparation de minéraux
US7951237B2 (en) 2000-02-21 2011-05-31 Smartfiber Ag Polymer composition and molded articles produced therefrom
CN103721819A (zh) * 2013-12-31 2014-04-16 昆明特康科技有限公司 一种循环流化床筛分、粉碎设备及其使用方法
EP2891771A1 (fr) * 2013-09-20 2015-07-08 RWE Power Aktiengesellschaft Procédé d'enrichissement de lignite brut

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405511B (de) * 1997-10-29 1999-09-27 Holderbank Financ Glarus Verfahren zum granulieren und zerkleinern von schmelzflüssigem material sowie vorrichtung zur durchführung dieses verfahrens
DE10011300A1 (de) 1999-03-10 2000-09-14 Sumitomo Spec Metals Mahlvorrichtung und Mahlverfahren zum Herstellen von Pulver
AT408343B (de) * 2000-01-12 2001-10-25 Holderbank Financ Glarus Verfahren und vorrichtung zum zerkleinern von heissklinker
US6964828B2 (en) * 2001-04-27 2005-11-15 3M Innovative Properties Company Cathode compositions for lithium-ion batteries
AU2002355544A1 (en) * 2001-08-07 2003-02-24 3M Innovative Properties Company Cathode compositions for lithium ion batteries
JP3992224B2 (ja) 2002-03-20 2007-10-17 株式会社リコー 電子写真トナー製造用流動槽式粉砕分級機およびそれを用いたトナーの製造方法
US6962006B2 (en) * 2002-12-19 2005-11-08 Acusphere, Inc. Methods and apparatus for making particles using spray dryer and in-line jet mill
US20040121003A1 (en) * 2002-12-19 2004-06-24 Acusphere, Inc. Methods for making pharmaceutical formulations comprising deagglomerated microparticles
US20040121234A1 (en) * 2002-12-23 2004-06-24 3M Innovative Properties Company Cathode composition for rechargeable lithium battery
US7211237B2 (en) * 2003-11-26 2007-05-01 3M Innovative Properties Company Solid state synthesis of lithium ion battery cathode material
WO2007070851A2 (fr) * 2005-12-15 2007-06-21 Acusphere, Inc. Procedes d'elaboration de preparations pharmaceutiques a base de particules pour administration pulmonaire ou nasale
JP5790042B2 (ja) 2011-03-11 2015-10-07 株式会社リコー 粉砕装置および筒状アダプター
ITMI20120635A1 (it) * 2012-04-17 2013-10-18 Micro Macinazione S A Apparecchiatura del tipo a mulino a getti per la micronizzazione di un materiale polveroso o in generale contenente particelle, con nuovo sistema di alimentazione e dosatura del materiale polveroso da micronizzare, e corrispondente procedimento di mi
DK3346990T3 (da) 2015-09-09 2020-06-02 Vectura Ltd Fremgangsmåde til stråleformaling
CN105855014A (zh) * 2016-03-28 2016-08-17 北京首钢国际工程技术有限公司 一种钢渣超细粉生产工艺
CN106269139B (zh) * 2016-09-29 2018-07-06 西南科技大学 一种提高气流磨颗粒加速性能的方法
DE102018008127B4 (de) 2018-10-13 2022-06-09 Hosokawa Alpine Aktiengesellschaft Blaskopf und Verfahren zur Herstellung einer Mehrschichtschlauchfolie
DE102018009632B4 (de) 2018-12-11 2021-12-09 Hosokawa Alpine Aktiengesellschaft Vorrichtung zum Aufwickeln und Wickelwechsel von bahnförmigem Material und ein Verfahren dafür
DE102020006008B3 (de) 2020-10-01 2022-03-31 Hosokawa Alpine Aktiengesellschaft Fließbettgegenstrahlmühle zur Erzeugung feinster Partikel aus Aufgabegut geringer Schüttdichte und Verfahren dafür

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006179A1 (fr) * 1988-11-28 1990-06-14 Oy Finnpulva Ab Procede et equipement de traitement de matiere finement divisee
EP0601511A1 (fr) * 1992-12-10 1994-06-15 Roland Dr.-Ing. Nied Procédé et dispositif de brayage à impact pour particules solides
DE19513035A1 (de) * 1995-04-06 1996-10-10 Nied Roland Fließbett-Strahlmahlung

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DE2738980A1 (de) * 1977-08-30 1979-03-08 Friedhelm Kaufmann Verfahren zur zerkleinerung von mineralien, erzen und sonstigen sproeden materialien
DE3338138C2 (de) * 1983-10-20 1986-01-16 Alpine Ag, 8900 Augsburg Fließbett-Gegenstrahlmühle
US4592302A (en) * 1984-11-07 1986-06-03 Freund Industrial Co., Ltd. Coating method and apparatus
DE3620440A1 (de) * 1986-06-18 1987-12-23 Indutec Industrietechnik Gmbh Zweistufiges unter druck betriebenes gegenstrahl-zerkleinerungsverfahren zur vergroesserung der oberflaeche feinkoerniger bis koerniger schuettgueter
DE3844272A1 (de) * 1988-12-30 1990-07-05 Leybold Ag Glueh- und abschreckverfahren und anlage zur durchfuehrung des verfahrens
US5247052A (en) * 1988-12-31 1993-09-21 Hoechst Aktiengesellschaft Fine-grained polyether-ketone powder, process for the manufacture thereof, and the use thereof
US5133504A (en) * 1990-11-27 1992-07-28 Xerox Corporation Throughput efficiency enhancement of fluidized bed jet mill
DE4243438C2 (de) * 1992-12-22 1996-06-05 Hosokawa Alpine Ag Verfahren und Vorrichtung zur Fließbett-Strahlmahlung
US5447275A (en) * 1993-01-29 1995-09-05 Canon Kabushiki Kaisha Toner production process
US5494520A (en) * 1994-10-07 1996-02-27 Xerox Corporation Apparatus for coating jet milled particulates onto a substrate by use of a rotatable applicator
US5562253A (en) * 1995-03-23 1996-10-08 Xerox Corporation Throughput efficiency enhancement of fluidized bed jet mill
US5695132A (en) * 1996-01-11 1997-12-09 Xerox Corporation Air actuated nozzle plugs
US5683039A (en) * 1996-03-28 1997-11-04 Xerox Corporation Laval nozzle with central feed tube and particle comminution processes thereof
US5716751A (en) * 1996-04-01 1998-02-10 Xerox Corporation Toner particle comminution and surface treatment processes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006179A1 (fr) * 1988-11-28 1990-06-14 Oy Finnpulva Ab Procede et equipement de traitement de matiere finement divisee
EP0601511A1 (fr) * 1992-12-10 1994-06-15 Roland Dr.-Ing. Nied Procédé et dispositif de brayage à impact pour particules solides
DE19513035A1 (de) * 1995-04-06 1996-10-10 Nied Roland Fließbett-Strahlmahlung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7951237B2 (en) 2000-02-21 2011-05-31 Smartfiber Ag Polymer composition and molded articles produced therefrom
EP1808231A1 (fr) * 2006-01-14 2007-07-18 Josef Fischer Séparation de minéraux
EP2891771A1 (fr) * 2013-09-20 2015-07-08 RWE Power Aktiengesellschaft Procédé d'enrichissement de lignite brut
CN103721819A (zh) * 2013-12-31 2014-04-16 昆明特康科技有限公司 一种循环流化床筛分、粉碎设备及其使用方法
CN103721819B (zh) * 2013-12-31 2015-05-06 昆明特康科技有限公司 一种循环流化床筛分、粉碎设备及其使用方法

Also Published As

Publication number Publication date
DE19728382A1 (de) 1999-01-07
DE19728382C2 (de) 2003-03-13
US5992773A (en) 1999-11-30
JPH1170340A (ja) 1999-03-16

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