EP0300402A2 - Production method for extremely small particles, and application of said method - Google Patents

Production method for extremely small particles, and application of said method Download PDF

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Publication number
EP0300402A2
EP0300402A2 EP88111494A EP88111494A EP0300402A2 EP 0300402 A2 EP0300402 A2 EP 0300402A2 EP 88111494 A EP88111494 A EP 88111494A EP 88111494 A EP88111494 A EP 88111494A EP 0300402 A2 EP0300402 A2 EP 0300402A2
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EP
European Patent Office
Prior art keywords
particles
impact
suspension
liquid
application
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Granted
Application number
EP88111494A
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German (de)
French (fr)
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EP0300402A3 (en
EP0300402B1 (en
Inventor
Roland Dr.-Ing. Nied
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Individual
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Priority to AT88111494T priority Critical patent/ATE73015T1/en
Publication of EP0300402A2 publication Critical patent/EP0300402A2/en
Publication of EP0300402A3 publication Critical patent/EP0300402A3/en
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    • 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
    • B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the so-called impact crushing process per se is generally known and applied prior art. With it, solid particles, which are to be broken down into a plurality of correspondingly smaller particles, are brought into impact with great energy to a substantially solid or rigid plate; upon impact, the relatively larger particles are broken down into the relatively smaller particles which are collected and, if appropriate after appropriate preparation, are available for further use.
  • This version of the method can also be replaced by a version of the method in which at least two penetrated gas jets are directed against one another, so that when the two gas-solid particle jets strike, solid particles of both jets meet and are broken down in the process.
  • the impact crushing method in both versions can only be used successfully for crushing particles if the mass of the particles to be broken down does not fall below a certain limit value.
  • the limit value below which it is no longer possible to use the conventional method as a result of the mass of the particles to be crushed being too small can be defined with the particle size and this again by the size of the diameter of about 1-5 ⁇ m, depending on the material to be shredded or its specific weight.
  • the conventional impact crushing process will only be applicable with success if the particles to be crushed unite Have a diameter of about 1-5 ⁇ m and the particles are not expected to break down below this range.
  • the gas flow initially has a flow direction perpendicular to the baffle, ie is directed against the baffle in order to be deflected at the baffle or directly in front of it in a direction parallel to the baffle.
  • the impact surface is the essentially rigid surface in the first process version, and part of the surface of a solid particle of the countercurrent in the second process version.
  • the particles maintain the original flow direction perpendicular to the impact surface, hit it and are broken down into smaller particles.
  • the mass of the particles is too small, so essentially their diameter is less than about 1-5 ⁇ m, the particles are deflected by the gas flow, in the extreme case they do not arrive at all, but at most with less and too small for a particle size reduction Energy on the baffle. This process is repeated until all particles have the desired fineness.
  • the particles to be comminuted are shot against one another.
  • the beam deflection means that the particles are too small from the one against the other directed direction of movement in a mutually parallel direction of movement. As a result, they no longer meet each other or with too little energy.
  • the object of the invention is to remedy this deficiency and to develop or further develop the known impact crushing method in such a way that the crushing or decomposition of the particles can be reliably expected if the particles to be crushed have such a small mass that this is caused by a particle diameter of about 1-5 microns or below is marked.
  • an essentially rigid and solid, preferably flat baffle plate 1 is provided in the usual way in the first method version (FIG. 1).
  • a suspension container 2 is arranged at a predetermined distance in front of the baffle plate 1, in which the solid particles to be comminuted are introduced into water or another suitable liquid and the choice of the introduction technique ensures that liquid and solids form a homogeneous suspension.
  • the solid particles at least partially have a particle size of approximately 1-5 ⁇ m or less, it being immaterial whether particles above this size are present or not, since the invention only deals with the solid particles whose size is in the range of approximately 1-5 ⁇ m or below.
  • the suspension can be removed from the housing at the lower, tapered end.
  • the suspension is atomized at a predetermined distance in front of the baffle plate 1 by means of an atomizing nozzle 3.
  • an atomizing part will be a liquid drop in which several solid particles, each of which are extremely small, are incorporated.
  • everyone Drops will have a mass which, in conjunction with the acceleration which is imparted to him during the atomization process, causes an energy to strike the front of the baffle plate 1 so that each solid particle, despite its low mass, is broken down into several even smaller particles.
  • Sprayed-on liquid and comminuted particles are then separated from one another in a suitable manner, whereupon the liquid for reuse, the particles comminuted to sizes well below 1-5 ⁇ m are fed to their intended purpose.
  • the second version of the impact crushing method provides for at least two gas nozzles 4, 5 directed against one another in the configuration according to the invention, from which rapid gas jets 6,7 are introduced into a container 9 filled with a suspension 8 of liquid and solid particles to be crushed.
  • the fast gas jets take up droplets from the surrounding suspension, which in turn contains several solid particles according to the law of probability.
  • the crushing takes place in the plane of the focal point of the gas jets directed against one another by the collision of the suspension drops or the solid particles therein.
  • the processes described are repeated several times for each version of the process, in particular if the suspension has a large proportion of large solid particles at the beginning, all of which are to be broken down into sizes below about 1-5 ⁇ m.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Colloid Chemistry (AREA)

Abstract

The subject of the invention is a method for obtaining extremely small particles to below 1 mu m by pulverising, which is characterised in that the particles are suspended in a liquid in order to increase their mass and a droplet-shaped amount of the suspension taken from the suspension is made to impact. The method is intended in particular for use in pulverising using a largely rigid plate on which particles of a particle stream are made to impact.

Description

Die Erfindung bezieht sich auf ein Verfahren gemäß dem Gattungs­begriff des Anspruches 1.The invention relates to a method according to the preamble of claim 1.

Das sogenannte Prallzerkleinerungsverfahren an sich ist allgemein bekannter und angewendeter Stand der Technik. Bei ihm werden Feststoffpartikel, die in eine Mehrzahl entsprechend kleinere Partikel zerlegt werden sollen, mit großer Energie zum Aufprallen auf eine im wesentlichen feste bzw. starre Platte gebracht; im Aufprallen erfolgt die Zerlegung der relativ größeren Partikel in die relativ kleineren Partikel, die gesammelt werden und, gegebe­nenfalls nach entsprechender Aufbereitung, zur Weiterverwendung zur Verfügung stehen. An die Stelle dieser Verfahrensversion kann auch eine Verfahrensversion treten, bei der mindestens zwei durchsetzte Gasstrahlen gegeneinander gerichtet werden, so daß beim Auftreffen der beiden Gas-Feststoffpartikel-Strahlen Fest­stoffpartikel beider Strahlen aufeinandertreffen und dabei zer­legt werden.The so-called impact crushing process per se is generally known and applied prior art. With it, solid particles, which are to be broken down into a plurality of correspondingly smaller particles, are brought into impact with great energy to a substantially solid or rigid plate; upon impact, the relatively larger particles are broken down into the relatively smaller particles which are collected and, if appropriate after appropriate preparation, are available for further use. This version of the method can also be replaced by a version of the method in which at least two penetrated gas jets are directed against one another, so that when the two gas-solid particle jets strike, solid particles of both jets meet and are broken down in the process.

Es ist nun zu erwarten, daß das Prallzerkleinerungsverfahren in beiden Versionen nur dann für die Zerkleinerung von Partikeln mit Erfolg angewendet werden kann, wenn die Masse der zu zerlegenden Partikel einen bestimmten Grenzwert nicht unterschreitet. Ange­sichts der Realitäten bei der Prallzerkleinerung kann der Grenz­wert, unterhalb dem infolge zu kleiner Masse der zu zerkleinern­den Partikel die Anwendung des herkömmlichen Verfahrens nicht mehr möglich ist, mit der Partikelgröße definiert werden und diese wieder durch die Größe des Durchmessers mit etwa 1-5 µm, je nach dem zu zerkleinernden Stoff bzw. dessen spezifischem Gewicht. Das herkömmliche Prallzerkleinerungsverfahren wird nur dann mit Erfolg anwendbar sein, wenn die zu zerkleinernden Partikel einen Durchmesser von über etwa 1-5 µm haben und eine Zerlegung der Partikel unter diesen Bereich nicht erwartet wird.It is now to be expected that the impact crushing method in both versions can only be used successfully for crushing particles if the mass of the particles to be broken down does not fall below a certain limit value. In view of the realities of impact crushing, the limit value below which it is no longer possible to use the conventional method as a result of the mass of the particles to be crushed being too small can be defined with the particle size and this again by the size of the diameter of about 1-5 µm, depending on the material to be shredded or its specific weight. The conventional impact crushing process will only be applicable with success if the particles to be crushed unite Have a diameter of about 1-5 µm and the particles are not expected to break down below this range.

Haben die zu zerkleinernden Partikel einen Durchmesser von etwa 1-5 µm oder weniger, so wird die Gefahr gesehen, daß die in einem gegen die Prallfläche gerichteten Gasstrom mitgeführten Partikel nicht oder zumindest nicht mit ausreichender Energie auf die Prallfläche bzw. die Partikel des Gegenstromes treffen. Der Gas­strom hat zunächst eine zur Prallfläche senkrechte Strömungs­richtung, ist also gegen die Prallfläche gerichtet, um an der Prallfläche beziehungsweise unmittelbar vor dieser in eine zur Prallfläche parallele Richtung umgelenkt zu werden. Die Prall­fläche ist bei der ersten Verfahrensversion die im wesentlichen starre Fläche, bei der zweiten Verfahrensversion ein Teil der Oberfläche eines Feststoffpartikels des Gegenstromes. Ist der Durchmesser der Partikel größer als etwa 1-5 µm und ihre Masse entsprechend groß, so behalten die Partikel die ursprüngliche Strömungsrichtung senkrecht zur Prallfläche bei, schlagen auf diese auf und werden in kleinere Partikel zerlegt. Ist die Masse der Partikel jedoch zu klein, liegt also im wesentlichen ihr Durchmesser unter etwa 1-5 µm, so werden die Partikel mit der Gasströmung umgelenkt, sie gelangen im äußersten Fall garnicht, allenfalls aber mit geringer und für eine Zerkleinerung der Partikel zu kleiner Energie auf die Prallfläche. Dieser Vorgang wird so lange wiederholt, bis alle Partikel die gewünschte Fein­heit aufweisen.If the particles to be comminuted have a diameter of approximately 1-5 μm or less, the danger is seen that the particles carried in a gas stream directed against the impact surface do not hit the impact surface or the countercurrent particles with sufficient energy . The gas flow initially has a flow direction perpendicular to the baffle, ie is directed against the baffle in order to be deflected at the baffle or directly in front of it in a direction parallel to the baffle. The impact surface is the essentially rigid surface in the first process version, and part of the surface of a solid particle of the countercurrent in the second process version. If the diameter of the particles is greater than about 1-5 µm and their mass is correspondingly large, the particles maintain the original flow direction perpendicular to the impact surface, hit it and are broken down into smaller particles. However, if the mass of the particles is too small, so essentially their diameter is less than about 1-5 µm, the particles are deflected by the gas flow, in the extreme case they do not arrive at all, but at most with less and too small for a particle size reduction Energy on the baffle. This process is repeated until all particles have the desired fineness.

Soll nun ein Feststoff vollständig auf eine Korngröße kleiner als 1-5 µm zerkleinert werden, so muß sichergestellt werden, daß auch Teilchen, die nur wenig größer als das gewünschte Korn sind (z.B. 1,5 µm), noch auf die Prallplatte gelangen.If a solid is now to be completely crushed to a grain size smaller than 1-5 µm, it must be ensured that even particles that are only slightly larger than the desired grain (e.g. 1.5 µm) still get onto the baffle plate.

Entsprechendes gilt, wenn in der Ebene, in der sich bei der zweiten Verfahrensversion mindestens zwei gegeneinander gerichte­te Gasstrahlen treffen, die zu zerkleinernden Partikel gegen­einander geschossen werden. Auch hier werden durch die Strahl­umlenkung zu kleine Teilchen von der ursprünglich gegeneinander gerichteten Bewegungsrichtung in eine zueinander parallele Bewe­gungsrichtung umgelenkt. Dadurch treffen sie einander nicht mehr oder mit zu geringer Energie.The same applies if in the plane in which at least two gas jets directed against one another meet in the second version of the method, the particles to be comminuted are shot against one another. Here, too, the beam deflection means that the particles are too small from the one against the other directed direction of movement in a mutually parallel direction of movement. As a result, they no longer meet each other or with too little energy.

Aufgabe der Erfindung ist es, diesem Mangel abzuhelfen und das bekannte Prallzerkleinerungsverfahren so auszubilden bzw. weiter zu entwickeln, daß auch die Zerkleinerung bzw. Zerlegung der Partikel dann zuverlässig erwartet werden kann, wenn die zu zer­kleinernden Partikel eine so geringe Masse haben, daß dies durch einen Partikeldurchmesser von etwa 1-5 µm oder darunter gekenn­zeichnet ist.The object of the invention is to remedy this deficiency and to develop or further develop the known impact crushing method in such a way that the crushing or decomposition of the particles can be reliably expected if the particles to be crushed have such a small mass that this is caused by a particle diameter of about 1-5 microns or below is marked.

Der Lösung der Aufgabe dienen die Merkmale der Patentansprüche.The features of the claims serve to solve the problem.

Die Erfindung wird nachfolgend anhand der Zeichnung erläutert, und zwar anhand der Figuren 1 und 2 für jede der beiden Versionen der Prallzerkleinerung.The invention is explained below with reference to the drawing, specifically with reference to Figures 1 and 2 for each of the two versions of the impact crushing.

Bei dem erfindungsgemäßen Verfahren ist bei der ersten Verfah­rensversion in üblicher Weise eine im wesentlichen starre und feste, vorzugsweise ebene Prallplatte 1 vorgesehen (Fig.1). In einem vorgegebenen Abstand ist vor der Prallplatte 1 ein Suspen­sionsbehälter 2 angeordnet, in dem in Wasser oder eine andere geeignete Flüssigkeit die zu zerkleinernden Feststoffpartikel eingebracht werden und durch Wahl der Einbringungstechnik dafür gesorgt wird, daß Flüssigkeit und Feststoffe eine homogene Sus­pension bilden. Die Feststoffpartikel haben zumindest teilweise eine Partikelgröße von etwa 1-5 µm oder weniger, wobei es gleich­gültig ist, ob Partikel über dieser Größe vorhanden sind oder nicht, da sich die Erfindung nur mit den Feststoffpartikeln be­faßt, deren Größe im Bereich etwa 1-5 µm oder darunter liegt. Die Suspension kann dem Gehäuse am unteren, konisch zulaufenden Ende entnommen werden. Die Suspension wird in einem vorgegebenen Ab­stand vor der Prallplatte 1 mittels einer Zerstäubungsdüse 3 zer­stäubt. Nach dem Gesetz der Wahrscheinlichkeit wird ein Zerstäu­bungsteil ein Flüssigkeitstropfen sein, in dem mehrere, je für sich extrem kleine Feststoffpartikel inkorporiert sind. Jeder Tropfen wird eine Masse haben, die ihm in Verbindung mit der Beschleunigung, die ihm während des Zerstäubungsvorganges ver­mittelt wird, mit einer Energie auf der Vorderseite der Prall­platte 1 auftreffen läßt, daß jeder Feststoffpartikel trotz seiner geringen Masse in mehrere noch kleinere Partikel zerlegt wird. Aufgespritzte Flüssigkeit und zerkleinerte Partikel werden dann in geeigneter Weise voneinander getrennt, worauf die Flüssig­keit der Wiederverwendung, die auf Größen deutlich unter 1-5 µm zerkleinerten Partikel ihrem Bestimmungszweck zugeführt werden.In the method according to the invention, an essentially rigid and solid, preferably flat baffle plate 1 is provided in the usual way in the first method version (FIG. 1). A suspension container 2 is arranged at a predetermined distance in front of the baffle plate 1, in which the solid particles to be comminuted are introduced into water or another suitable liquid and the choice of the introduction technique ensures that liquid and solids form a homogeneous suspension. The solid particles at least partially have a particle size of approximately 1-5 μm or less, it being immaterial whether particles above this size are present or not, since the invention only deals with the solid particles whose size is in the range of approximately 1-5 μm or below. The suspension can be removed from the housing at the lower, tapered end. The suspension is atomized at a predetermined distance in front of the baffle plate 1 by means of an atomizing nozzle 3. According to the law of probability, an atomizing part will be a liquid drop in which several solid particles, each of which are extremely small, are incorporated. Everyone Drops will have a mass which, in conjunction with the acceleration which is imparted to him during the atomization process, causes an energy to strike the front of the baffle plate 1 so that each solid particle, despite its low mass, is broken down into several even smaller particles. Sprayed-on liquid and comminuted particles are then separated from one another in a suitable manner, whereupon the liquid for reuse, the particles comminuted to sizes well below 1-5 μm are fed to their intended purpose.

Die zweite Version des Prallzerkleinerungsverfahrens (Fig.2) sieht in der erfindungsgemäßen Ausbildung mindestens zwei gegen­einander gerichtete Gasdüsen 4,5 vor, aus denen schnelle Gas­strahlen 6,7 in einen mit einer Suspension 8 aus Flüssigkeit und zu zerkleinernden Feststoffpartikeln gefüllten Behälter 9 ein­geleitet werden. Die schnellen Gasstrahlen nehmen dabei aus der sie umgebenden Suspension Tröpfchen auf, in denen wiederum nach dem Gesetz der Wahrscheinlichkeit mehrere Feststoffpartikel ent­halten sind. Die Zerkleinerung vollzieht sich dabei in der Ebene des Brennpunktes der gegeneinander gerichteten Gasstrahlen durch gegenseitiges Zusammenprallen der Suspensionstropfen bzw. der darin befindlichen Feststoffteilchen.The second version of the impact crushing method (FIG. 2) provides for at least two gas nozzles 4, 5 directed against one another in the configuration according to the invention, from which rapid gas jets 6,7 are introduced into a container 9 filled with a suspension 8 of liquid and solid particles to be crushed. The fast gas jets take up droplets from the surrounding suspension, which in turn contains several solid particles according to the law of probability. The crushing takes place in the plane of the focal point of the gas jets directed against one another by the collision of the suspension drops or the solid particles therein.

Gegebenenfalls werden bei jeder Verfahrensversion die beschriebe­nen Vorgänge mehrfach wiederholt, insbesondere wenn die Suspen­sion am Beginn einen hohen Anteil großer Feststoffpartikel hat, die alle in Größen unter etwa 1-5 µm zerlegt werden sollen.If necessary, the processes described are repeated several times for each version of the process, in particular if the suspension has a large proportion of large solid particles at the beginning, all of which are to be broken down into sizes below about 1-5 μm.

Claims (5)

1. Verfahren zum Erzielen extrem kleiner Partikel bis zu unter 1 µm durch Prallzerkleinerung,
dadurch gekennzeichnet,
daß die Partikel zur Erhöhung ihrer Masse in einer Flüssig­keit suspendiert werden und eine der Suspension entnommene tröpfenförmige Suspensionsteilmenge zum Aufprallen gebracht wird.1. Method for obtaining extremely small particles down to less than 1 µm by impact crushing,
characterized,
that the particles are suspended in a liquid in order to increase their mass and a droplet-shaped portion of the suspension taken from the suspension is made to impact. 2. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß eine Zusammensetzung jedes Tropfens aus einer bestimmten Flüssigkeitsmenge angestrebt wird, die ein einziges Feststoff­partikel umschließt.2. The method according to claim 1,
characterized,
that a composition of each drop is sought from a certain amount of liquid which encloses a single solid particle. 3. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß eine bestimmte Suspensionsteilmenge der Suspension ent­nommen wird, wobei es bei der Tropfenbildung den Entnahme­bedingungen überlassen bleibt, wie viele Feststoffpartikel der Flüssigkeitsmenge eines Tropfens zugeordnet werden.3. The method according to claim 1,
characterized,
that a certain portion of the suspension is removed from the suspension, it being left to the removal conditions in the formation of drops how many solid particles are assigned to the amount of liquid in a drop. 4. Anwendung des Verfahrens nach zumindest einem der Ansprüche 1-3 bei der Prallzerkleinerung mittels einer weitgehend star­ren Platte, auf der Partikel eines Partikelstromes zum Auf­prallen gebracht werden.4. Application of the method according to at least one of claims 1-3 in the impact crushing by means of a largely rigid plate on which particles of a particle stream are made to impact. 5. Anwendung des Verfahrens nach zumindest einem der Ansprüche 1-3 bei der Prallzerkleinerung mittels mindestens zweier Partikel­ströme, die zusammengeführt werden, um Feststoffpartikel bei­der Partikelströme zum Aufprallen aufeinander zu bringen.5. Application of the method according to at least one of claims 1-3 in the impact crushing by means of at least two particle streams which are brought together to bring solid particles of both particle streams to impact one another.
EP88111494A 1987-07-22 1988-07-15 Production method for extremely small particles, and application of said method Expired - Lifetime EP0300402B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111494T ATE73015T1 (en) 1987-07-22 1988-07-15 METHOD OF GENERATION OF EXTREMELY SMALL PARTICLES AND APPLICATION OF THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724297 1987-07-22
DE19873724297 DE3724297A1 (en) 1987-07-22 1987-07-22 METHOD FOR PRODUCING EXTREMELY SMALL PARTICLES AND APPLICATION OF THE METHOD

Publications (3)

Publication Number Publication Date
EP0300402A2 true EP0300402A2 (en) 1989-01-25
EP0300402A3 EP0300402A3 (en) 1989-11-29
EP0300402B1 EP0300402B1 (en) 1992-03-04

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EP88111494A Expired - Lifetime EP0300402B1 (en) 1987-07-22 1988-07-15 Production method for extremely small particles, and application of said method

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EP (1) EP0300402B1 (en)
AT (1) ATE73015T1 (en)
DE (2) DE3724297A1 (en)
ES (1) ES2029499T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641129A1 (en) * 1996-10-05 1998-04-09 Nied Roland Method of decomposing solid matter particles in fluidised bed

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4015605A1 (en) * 1990-05-15 1991-11-21 Nied Roland Production of particles smaller than 1 micro-metre - involves use of high velocity jets directed through suspension
DE4241549A1 (en) * 1992-12-10 1994-06-16 Nied Roland Method and device for impact crushing of solid particles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164856A1 (en) * 1971-12-27 1973-07-05 Texaco Development Corp Fluid energy grinding system - wherein a stream of a dispersion of solid particles is accelerated to supersonic velocity
US4261521A (en) * 1980-03-13 1981-04-14 Ashbrook Clifford L Method and apparatus for reducing molecular agglomerate sizes in fluids
US4619406A (en) * 1976-12-22 1986-10-28 Can-Am Engineering Corporation Hydraulic system and method of improving the working properties thereof
DD248296A1 (en) * 1984-10-24 1987-08-05 Guben Chemiefaserwerk ACCELERATION ROTOR FOR PRUNING MILLS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164856A1 (en) * 1971-12-27 1973-07-05 Texaco Development Corp Fluid energy grinding system - wherein a stream of a dispersion of solid particles is accelerated to supersonic velocity
US4619406A (en) * 1976-12-22 1986-10-28 Can-Am Engineering Corporation Hydraulic system and method of improving the working properties thereof
US4261521A (en) * 1980-03-13 1981-04-14 Ashbrook Clifford L Method and apparatus for reducing molecular agglomerate sizes in fluids
DD248296A1 (en) * 1984-10-24 1987-08-05 Guben Chemiefaserwerk ACCELERATION ROTOR FOR PRUNING MILLS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641129A1 (en) * 1996-10-05 1998-04-09 Nied Roland Method of decomposing solid matter particles in fluidised bed

Also Published As

Publication number Publication date
DE3868746D1 (en) 1992-04-09
ES2029499T3 (en) 1992-08-16
DE3724297A1 (en) 1989-02-02
EP0300402A3 (en) 1989-11-29
EP0300402B1 (en) 1992-03-04
ATE73015T1 (en) 1992-03-15

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