EP3520899B1 - Dispositif et procédé de broyage énergique et/ou de pulvérisation de particules - Google Patents

Dispositif et procédé de broyage énergique et/ou de pulvérisation de particules Download PDF

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Publication number
EP3520899B1
EP3520899B1 EP18155401.5A EP18155401A EP3520899B1 EP 3520899 B1 EP3520899 B1 EP 3520899B1 EP 18155401 A EP18155401 A EP 18155401A EP 3520899 B1 EP3520899 B1 EP 3520899B1
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EP
European Patent Office
Prior art keywords
grinding
particles
grinding chamber
gas
chamber
Prior art date
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EP18155401.5A
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German (de)
English (en)
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EP3520899A1 (fr
Inventor
José M. BELLOSTA VON COLBE
Thomas Klassen
Martin Dornheim
Henning Zoz
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.)
Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
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Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
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Application filed by Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH filed Critical Helmholtz Zentrum Geesthacht Zentrum fuer Material und Kustenforschung GmbH
Priority to EP18155401.5A priority Critical patent/EP3520899B1/fr
Priority to ES18155401T priority patent/ES2853477T3/es
Priority to DK18155401.5T priority patent/DK3520899T3/da
Priority to KR1020190012836A priority patent/KR102339136B1/ko
Publication of EP3520899A1 publication Critical patent/EP3520899A1/fr
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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
    • 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
    • B02C17/18—Details
    • B02C17/1805—Monitoring devices for tumbling 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
    • 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
    • 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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
    • 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
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B02C17/186—Adding fluid, other than for crushing by fluid energy
    • B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
    • B02C17/188—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone characterised by point of gas entry or exit or by gas flow path

Definitions

  • the present invention relates to a device and a method for high-energy and / or fine grinding of particles with the aid of pourable grinding media.
  • Such devices are u. a. used for fine grinding or homogenization of regrind.
  • the ground material is filled into a grinding chamber together with grinding media in the form of balls and set in motion with the help of a driven rotor.
  • the moving balls collide with the grist, causing it to be crushed.
  • Ball mills allow milling in a gas atmosphere such as in the manufacture of metal hydrides, i. when grinding metal alloys in a hydrogen atmosphere, or when fine grinding metal hydrides in a protective gas atmosphere, for example using argon.
  • any substances can be used as regrind, i. H. for example stones, cement, wood as well as color pigments and metal alloys.
  • the ground material can be comminuted into particles with a size of a few nm up to a size of several ⁇ m.
  • a ball mill is in the DE 196 35 500 A1 disclosed.
  • the ball mill comprises a grinding container with a grinding chamber located therein which can hold a batch of pourable grinding media.
  • a rotor is arranged in the grinding chamber, the shaft of which can be driven relative to the stationary grinding body.
  • the grinding container has a connecting piece that allows the grinding material to be filled into the grinding container and removed of the ground material after the grinding process has ended.
  • the particle size of the ground material can be influenced by several parameters, such as the speed of the rotor, the ratio, in particular the mass ratio, between grinding media and ground material, and in particular the grinding time. These parameters are different for each grist.
  • the speed of the rotor the ratio, in particular the mass ratio, between grinding media and ground material, and in particular the grinding time.
  • These parameters are different for each grist.
  • opening the grinding chamber to control the size of the particles during a grinding process is not possible without destroying the gas atmosphere. This would have the consequence, for example when using metal hydrides, that they come into unintentional contact with oxygen and possibly become unusable. It can therefore happen that different batches of the same ground material have to be ground with different grinding parameters in order to obtain particles with the desired particle size. This leads to an uneconomical operation of the ball mill, because under certain circumstances the ground material must be disposed of if the grinding result is insufficient.
  • DE 36 23 833 A1 discloses a device according to the preamble of claim 1 and relates to a method for controlling an agitator mill in which the product fineness is determined, the determined value is introduced into a control rod and at least one parameter that determines the specific grinding capacity is controlled.
  • the present invention is based on the object of providing a device for high-energy and / or ultra-fine grinding of particles which enables economical operation. Furthermore, an economical method for high-energy and / or fine grinding of particles is to be made available.
  • the device comprises a measuring device for measuring the particle size of the grist.
  • the grinding container has at least one connection port for connection to the measuring device.
  • the measuring device is connected to the grinding container in such a way that particles can be removed from the grinding chamber during a grinding process and their size can be determined.
  • the connection terminal is preferably designed as a first connection terminal. The particles can optionally be removed continuously or discontinuously.
  • the particle size measurement during a grinding process enables grinding parameters such as the speed of the rotor and the grinding time to be adjusted during the grinding process, so that, if at all, a minimum number of grinding attempts is necessary in order to obtain the desired particle size of the grist receive.
  • the particle size is preferably determined by means of laser diffractometry.
  • particles are removed from the grinding container in a gas extraction stream and guided past a laser beam at a measuring point of the measuring device for laser diffractometry.
  • the general method for particle size determination by laser diffractometry is known and is described, for example, in ISO 13320 (2009).
  • Laser diffractometers are available, for example, from Malvern Instruments GmbH, Berlinberg, Germany or from Sympatec, Clausthal-Zellerfeld, Germany.
  • the measuring device is connected to a gas supply line and is designed to conduct a gas supply stream from the gas supply line through the connection port into the grinding chamber in a first switching state during the grinding process.
  • the gas supply line is preferably connected to a gas reservoir, so that a continuous Gas supply flow is guaranteed.
  • the grinding material moving in the grinding chamber tends to stick to the first connection connection and clog it, so that no more particles can be removed from the grinding chamber. With the aid of a continuous gas supply flow into the grinding chamber, a corresponding clogging of the first connection connection is prevented during operation of the mill outside the removal times.
  • the measuring device is further designed to generate a negative pressure in a second switching state with the aid of the gas feed stream flowing out of the gas feed line in order to suck in a gas extraction stream with the particles contained therein from the grinding chamber and to convey it towards the measuring device for particle size measurement.
  • the negative pressure is preferably generated in the measuring device.
  • the gas supply flow is diverted in such a way that, similar to the principle of a water jet pump, it generates a negative pressure and thus sucks a gas extraction flow from the grinding chamber.
  • the switching of the measuring device from the first to the second switching state and / or back can be done either manually or automatically by the measuring device.
  • the grinding container has two opposite end faces, each extending transversely to the longitudinal axis of the grinding container, the first connection port being arranged on one of the end faces and on an imaginary one, starting from the longitudinal axis, radially and substantially horizontal line is positioned.
  • the first connection connection is preferably located in the middle of the imaginary, horizontally extending line, ie in the middle between the longitudinal axis and an inner wall of the grinding container.
  • the first connection terminal has a single circular passage with a diameter of 0.1 mm to 5 mm, preferably 3 mm to 4.1 mm, particularly preferably about 4 mm.
  • the passage is provided in an insert that can be inserted into the first connection port.
  • the balls in the interior of the grinding chamber preferably have a considerably larger diameter than the circular passage. This prevents balls from flowing out of the grinding chamber through the first connection connection.
  • the configuration of the first connection terminal with only one circular passage can be kept free of blockages in a particularly simple and reliable manner. If the measuring device optionally conducts a continuous gas supply stream through the first connection connection into the grinding chamber, this must pass through the single circular passage and thereby keep it free. In contrast to a sieve, for example, a possible accumulation of particles behind the sieve is avoided which could react with oxygen and ignite in the process.
  • the device comprises a return line for returning the gas extraction flow taken from the grinding chamber and the particles contained therein from the measuring device into the grinding chamber.
  • the return line enables the removed particles to be automatically returned to the grinding chamber.
  • the grinding container has a second connection port for returning the gas extraction flow taken from the grinding chamber for particle size measurement, the return line being connected to the second connection port.
  • the second connection connection can be arranged on one of the two end faces or on a lateral surface of the cylindrical grinding container.
  • the particles are returned to the grinding chamber via the return line and the second connection connection together with the gas extraction flow.
  • the return of the gas removal stream and the particles contained therein is optionally also carried out continuously or discontinuously.
  • the grinding process is preferably not interrupted during the recycling.
  • the return line comprises a fan which conveys the gas extraction flow and the particles contained therein into the grinding chamber.
  • the fan promotes the gas extraction flow and the particles it contains after the Particle size measurement from the measuring device through the return line into the grinding chamber.
  • the return line comprises a separator for separating the particles contained in the gas extraction stream, the gas extraction stream and the separated particles being returned separately to the grinding chamber.
  • the separation of the measured particles from the gas extraction flow prevents them from being sucked in by the blower and possibly damaging the latter.
  • the separator is preferably designed as a cyclone, which enables the particles to be separated from the gas extraction flow.
  • the advantage of a cyclone is that it separates particles dynamically. Therefore, when using a cyclone as a separator, there is no need to change the filter, for which the protective gas chain would have to be interrupted.
  • the separator is arranged in the flow direction of the gas stream from the grinding chamber in the direction of the measuring device behind a measuring point of the measuring device.
  • the return line is preferably connected to a second connection port on the grinding container and via the separator to a third connection port on the grinding container.
  • the second connection port is used to return the gas withdrawal flow.
  • the third connection port is used to return the separated particles to the grinding chamber.
  • the material separated by the cyclone is preferably returned continuously to the grinding chamber. However, it is also possible to return the particles separated by means of the cyclone discontinuously to the grinding chamber. This can be done, for example, with the aid of a gear lock.
  • the grinding chamber is subjected to an overpressure.
  • the pressure in the grinding chamber is preferably 100 to 200 mbar above ambient pressure, that is to say 1.1 bar to 1.2 bar.
  • Milling and removal are preferably carried out the particles from the grinding container under excess pressure, which ensures that the sealed gas atmosphere can be maintained even in the event of minor leaks in the grinding chamber.
  • a reaction of the ground material with undesired impurities from the environment of the grinding container for example oxygen and / or nitrogen, is prevented.
  • impairment of the grist due to moisture in the ambient air is also avoided.
  • the overpressure in the grinding chamber is created by introducing gas, for example nitrogen, argon or hydrogen, into the grinding chamber after the material to be ground and the grinding media have been introduced into the grinding chamber until the desired pressure is in the grinding chamber.
  • gas for example nitrogen, argon or hydrogen
  • the overpressure is maintained during a grinding process preferably by introducing, preferably continuously introducing, the gas feed stream from a gas reservoir into the grinding chamber.
  • the device comprises a safety device which is designed to prevent a pressure prevailing in the grinding chamber from exceeding a predetermined threshold value and thereby keeping the pressure in the grinding chamber essentially constant.
  • the safety device is preferably designed as a pressure relief valve which is arranged between the measuring device and the first connection port.
  • the gas reservoir preferably has a pressure which is higher than the pressure in the grinding chamber.
  • the pressure in the gas reservoir is around 200 bar to 300 bar and the desired pressure in the grinding chamber is between 1.1 bar and 1.2 bar.
  • the gas feed stream which is passed into the grinding chamber during the grinding operation, also flows with a pressure in the direction of the grinding chamber which is higher than the desired pressure inside the grinding chamber.
  • the pressure relief valve is set in such a way that it releases gas to the environment, for example via a chimney, when the pressure prevailing in the grinding chamber exceeds a threshold value.
  • the gas reservoir has a pressure reducer, so that the gas supply stream does not flow into the grinding chamber at the pressure prevailing inside the gas reservoir, but is instead fed into the grinding chamber at a lower pressure than this, for example 5 bar.
  • the reduced pressure of the gas feed stream is in any case higher than the predetermined pressure prevailing in the grinding chamber.
  • the present invention also relates to a method for high-energy and / or ultra-fine grinding of particles with the features of patent claim 10. This enables economical operation of a device, as described above. By predicting the remaining grinding time, a single grinding of a batch is sufficient to achieve the desired particle size. Accordingly, material and time can be saved.
  • the removal of the particles in step (b) can optionally take place continuously or discontinuously. Accordingly, the measurement of the particles in step (c) can optionally also be carried out continuously or discontinuously.
  • the gas feed stream flows out of the gas feed line through the connection port into the grinding chamber.
  • the grinding stock moving in the grinding chamber tends to stick to the first connection connection and clog it, so that no more particles can be removed from the grinding chamber.
  • With the aid of a continuous gas supply flow into the grinding chamber clogging of the first connection port during operation of the mill outside of the removal times is prevented.
  • the measuring device is switched to a first switching state except during steps (b) and (c) in that the gas feed stream flows from the gas feed line through the first connection port into the grinding chamber.
  • the switching of the measuring device into the first switching state or from the first switching state into an optionally further switching state can take place manually or automatically.
  • the particles are removed in step (b) by switching the measuring device to a second switching state in which the gas feed stream flowing out of the gas feed line generates a negative pressure in order to suck in a gas extraction stream with the particles contained therein from the grinding chamber and to To promote measurement of the particles in the direction of the measuring device.
  • the gas supply flow is diverted in such a way that, similar to the principle of a water jet pump, it generates a negative pressure and thus sucks a gas extraction flow from the grinding chamber.
  • the particles are returned to the grinding chamber after step (c), ie after the particle size measurement.
  • step (c) the ratio between the grinding media and the ground material must be as constant as possible during the grinding process. This is ensured by returning the measured particles to the grinding chamber. A fan is optionally used for this.
  • Figure 1 a device designed as a ball mill 1 for high-energy and / or ultra-fine grinding of particles with the aid of pourable grinding media in a closed gas atmosphere is shown.
  • the ball mill 1 comprises a grinding container 2 for receiving grinding stock and grinding media.
  • the grinding container 2 comprises a closed housing 3 and a grinding chamber 4 located therein, which can be subjected to excess pressure.
  • the grinding container 2 is cylindrical and extends along a horizontal longitudinal axis 5.
  • a rotatably mounted rotor 6 is arranged for accelerating the grinding media during a grinding process.
  • the rotor 6 has a shaft 7 which is mounted on one side in the housing 3 of the grinding container 2.
  • the shaft 7 runs along the longitudinal axis 5 of the grinding container 2 and is driven by a motor 8.
  • the grinding container 2 also has two opposite end faces 9 which each extend transversely to the longitudinal axis 5 of the grinding container 2.
  • a first connecting connection 10 is arranged on one of the end faces 9 of the grinding container 2 and is positioned on an imaginary line that extends radially and essentially horizontally, starting from the longitudinal axis 5.
  • the first connection terminal 10 has a Insert 11 with a single circular passage with a diameter of about 3 to 4 mm.
  • the first connection port 10 is arranged on a jacket surface 18 of the cylindrical grinding container 2.
  • the ball mill 1 comprises a measuring device 12 for measuring the size of the particles.
  • the measuring device 12 is connected to the grinding container 2 via the first connection connection 10 in such a way that particles can be removed from the grinding chamber 4 and measured during a grinding process.
  • the measuring device 12 is further connected via a gas supply line 13 to a gas reservoir 14, for example a gas cylinder.
  • the measuring device 12 is designed to conduct a gas feed stream from the gas feed line 13 through the connection port 10 into the milling chamber 4 in a first switching state during the milling process. It is also designed to generate a negative pressure in the measuring device 12 in a second switching state with the aid of the gas feed stream flowing out of the gas feed line 13 in order to suck in a gas extraction stream with the particles contained therein from the grinding chamber 4 and to measure the particles in the direction of the measuring device 12 promote.
  • the measuring device 12 comprises a measuring point 15 at which the particle size is determined by means of laser diffractometry.
  • the gas extraction flow with the particles contained therein is guided past the measuring point 15 of the measuring device 12 and past a laser beam.
  • the measurement of the particle size with the aid of laser diffractometry is known and should therefore not be explained in more detail.
  • the ball mill 1 further comprises a return line 16 for returning the gas extraction flow and the particles contained therein from the measuring device 12 into the grinding chamber 4
  • Return line 16 is connected to the measuring device 12 and via a second connection port 17 and via a third connection port 20 to the grinding chamber 4.
  • the second connection port 17 and the third connection port 20 are arranged on a jacket surface 18 of the cylindrical grinding container 2.
  • the return line 16 comprises a separator designed as a cyclone 19 for separating the particles contained in the gas extraction flow.
  • the cyclone 19 is also connected to the grinding chamber 4 via the return line 16 and the third connection port 20.
  • the return line 16 further comprises a fan 21, by means of which the gas extraction flow and the particles contained therein are conveyed from the measuring device 12 to the cyclone 19.
  • the particles separated in the cyclone 19 are conducted into the grinding chamber 4 via the third connection connection 20.
  • the gas extraction flow without particles flows through the blower 21 and is conveyed through this via the second connection port 17 into the grinding chamber 4.
  • the gas extraction flow without particles and the separated particles are therefore returned separately to the grinding chamber 4. It is optionally also conceivable not to conduct the gas extraction flow completely without particles into the grinding chamber 4, but at least partially to discharge it to the environment. This prevents the pressure in the grinding chamber 4 from being too high and prevents the particles from flowing out of the cyclone 19 into the grinding chamber 4.
  • the at least only partial supply of the gas extraction flow without particles into the grinding chamber 4 can be used to set the pressure in the grinding chamber 4 such that there is a pressure gradient between the cyclone 19 and the grinding chamber 4, so that the particles flow from the cyclone 19 into the grinding chamber 4 .
  • the cyclone 19 and the third connection port 20 can be dispensed with.
  • the gas withdrawal flow together with the particles contained therein is returned to the grinding chamber 4 by means of the return line 16 via the second connection port 17.
  • the fan 21 is designed in such a way that the gas extraction flow and the particles contained therein can flow through it without damage.
  • Corresponding blowers are available on the free market.
  • the ball mill 1 further comprises a safety device designed as a pressure relief valve 22, which is designed to prevent a pressure prevailing in the grinding chamber 4 from exceeding a predetermined threshold value and thereby keep the pressure in the grinding chamber 4 essentially constant.
  • the pressure relief valve 22 is arranged between the first connection port 10 and the measuring device 12. It is also conceivable, however, to arrange the pressure relief valve 22, protected by a filter, for example directly on the grinding chamber 4, optionally on one of the end faces 9 or on the jacket surface 18 of the milling chamber.
  • the grinding container 2 further comprises at least one closable opening 23 for introducing grinding bodies and grinding stock in the form of particles. After the grinding process has ended, the ground particles and grinding bodies are removed from the grinding container 2 again through the closable opening 23.
  • the function of the ball mill 1 will be described using a method for high-energy and / or very fine grinding of particles with the aid of pourable grinding media.
  • pourable grinding media are introduced into the grinding chamber 4 through a closable opening 23 in the grinding container 2.
  • the grinding chamber 4 is then rendered inert by passing gas, for example nitrogen, argon or hydrogen, into the grinding chamber 4 until an overpressure of approx. 100 to 200 mbar above the ambient pressure, i.e. i.e. 1.1 bar to 1.2 bar, arises in the grinding chamber.
  • gas for example nitrogen, argon or hydrogen
  • the gas is supplied either via the closable opening 23, a separate connection port (not shown) or via the first connection port 10.
  • the solids to be ground are in the form of powder, comprising a large number of particles, through the closable opening 23 in the grinding container 2 introduced into the grinding chamber 4.
  • This is preferably done by means of an inerted line so that no ambient air, in particular oxygen, enters the grinding chamber 4 that has already been inerted together with the ground material.
  • a sluice is used for introducing the ground material into the grinding chamber 4.
  • step (a) the rotor 6 of the ball mill 1 is driven with the aid of the motor 8 to accelerate the grinding media in the grinding chamber 4.
  • the accelerated grinding media whirl around in the grinding chamber 4 and collide with particles, as a result of which they are comminuted.
  • step (b) particles are removed from the grinding chamber 4 via the first connection connection 10 and the size of the particles is measured in a method step (c) with the aid of the measuring device 12.
  • the individual grinding parameters such as, for example, the speed of the rotor 6 and / or the remaining grinding time, are determined as a function of the measured particle size.
  • the determination of the grinding time can be done by the operator of the ball mill 1 himself or automatically by means of a computing unit (not shown).
  • Steps (a) to (c) are carried out, in particular repeated, until the desired size of the particles is reached.
  • the closable opening 23 in the grinding container 4 is then opened and the ground particles are removed from the grinding chamber 4.
  • the particles are removed from the grinding chamber 4 by attaching a vessel (not shown) to the closable opening 23 and inerting the vessel together with an optional connection between the opening 23 and the vessel.
  • the ground particles are then removed from the grinding chamber 4 and filled into the vessel.
  • the measuring device 12 is switched to the first switching state, so that the gas supply stream flows from the gas supply line 13 through the first connection port 10 into the grinding chamber 4 and thus prevents the same from becoming blocked.
  • the pressure relief valve 22 prevents the pressure prevailing in the grinding space from exceeding a predetermined threshold value, and thereby keeps the pressure in the grinding space 4 essentially constant.
  • step (b) The removal of the particles from the grinding chamber 4 during step (b) takes place in that the measuring device 12 is switched manually or automatically to the second switching state.
  • the gas feed stream flowing out of the gas feed line generates a negative pressure in the measuring device 12 in order to reduce the gas extraction stream with the gas contained therein To suck in particles from the grinding chamber 4 and convey them in the direction of the measuring device 12 to measure the particles.
  • the gas extraction flow taken from the grinding chamber 4 is directed to a measuring point 15 in the measuring device 12, at which the particle size is determined by means of laser diffractometry.
  • the gas extraction flow taken from the grinding chamber 4 and the particles contained therein are conveyed to the cyclone 19 via the return line 16 with the aid of the fan 21.
  • the cyclone 19 separates the particles contained in the gas extraction stream from the gas extraction stream, whereupon the particles are passed into the grinding chamber 4 via the third connection connection 20.
  • the remaining gas extraction flow without particles is separated, i.e. conveyed separately from the particles via the second connection port 17 into the grinding chamber 4.
  • the cyclone 19 and the third connection port 20 can be dispensed with.
  • the gas extraction flow together with the particles contained therein is conveyed with the aid of the blower 21 via the return line 16 to the second connection connection 17 and into the grinding chamber 4.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Claims (14)

  1. Dispositif de broyage énergique et/ou de pulvérisation de particules à l'aide de corps broyants en vrac dans une atmosphère gazeuse fermée, comprenant
    un récipient de broyage (2) pour la réception des particules et des corps broyants avec un boîtier (3) fermé et un espace de broyage (4) situé à l'intérieur et un rotor (6) logé rotatif dans le récipient de broyage (2) pour l'accélération des corps broyants pendant une opération de broyage,
    dans lequel le dispositif comprend un dispositif de mesure (12) pour la mesure de la taille des particules et le récipient de broyage (2) présente au moins un raccord de liaison (10, 17, 20) pour la liaison au dispositif de mesure (12), dans lequel le dispositif de mesure (12) est relié au récipient de broyage (2) de sorte que des particules peuvent être prélevées de l'espace de broyage (4) pendant une opération de broyage et leur taille déterminée,
    caractérisé en ce
    que le récipient de broyage (2) est réalisé cylindrique et s'étend le long d'un axe longitudinal (5) horizontal et,
    que le dispositif de mesure (12) est relié à une conduite d'amenée de gaz (13) et est réalisé pour conduire, dans un premier état de commutation, pendant l'opération de broyage, un courant d'amenée de gaz de la conduite d'amenée de gaz (13) par le raccord de liaison (10) à l'espace de broyage (4).
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de mesure (12) est réalisé en outre pour générer dans un deuxième état de commutation à l'aide du courant d'amenée de gaz s'écoulant depuis la conduite d'amenée de gaz (13) une sous-pression pour aspirer, de l'espace de broyage (4), un courant de prélèvement de gaz avec les particules qui y sont contenues et pour favoriser la mesure des particules en direction du dispositif de mesure (12).
  3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le récipient de broyage (2) présente deux côtés frontaux (9) se faisant face, qui s'étendent respectivement transversalement à l'axe longitudinal (5) du récipient de broyage (2), dans lequel le raccord de liaison (10) est agencé à un des côtés frontaux (9) et est positionné sur une ligne imaginaire, partant de l'axe longitudinal, s'étendant radialement et sensiblement à l'horizontale.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le raccord de liaison (10) a un passage circulaire unique d'un diamètre de 0,1 mm à 5 mm, de préférence de 3 mm à 4,1 mm, de manière particulièrement préférée d'environ 4 mm.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif (1) comprend une conduite de retour (16) pour le retour du courant de prélèvement de gaz prélevé de l'espace de broyage (4) et des particules qui y sont contenues du dispositif de mesure (12) à l'espace de broyage (4).
  6. Dispositif selon la revendication 5, caractérisé en ce que la conduite de retour (16) comprend une soufflante (21) qui achemine le courant de prélèvement de gaz et les particules qui y sont contenues dans l'espace de broyage (4).
  7. Dispositif selon la revendication 5, caractérisé en ce que la conduite de retour (16) comprend un séparateur (19) pour la séparation des particules contenues dans le courant de prélèvement de gaz, dans lequel les particules séparées sont ramenées séparées du courant de prélèvement de gaz à l'espace de broyage (4).
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace de broyage (4) peut être sollicité avec une surpression.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif comprend un dispositif de sécurité (23), qui est réalisé pour empêcher qu'une pression régnant dans l'espace de broyage (4) dépasse une valeur seuil prédéterminée, et maintient ainsi la pression dans l'espace de broyage (4) sensiblement constante.
  10. Procédé de broyage énergique et/ou de pulvérisation de particules à l'aide de corps broyants en vrac dans un dispositif selon l'une quelconque des revendications 1 à 9, comprenant les étapes suivantes :
    (a) l'entraînement du rotor (6) pour l'accélération des corps broyants dans l'espace de broyage (4) ;
    (b) le prélèvement de particules de l'espace de broyage (4) par le biais du raccord de liaison (10) pendant l'opération de broyage ;
    (c) la mesure de la taille des particules à l'aide du dispositif de mesure (12) ;
    (d) la réalisation des étapes (a) à (c), jusqu'à ce que la taille des particules souhaitée soit atteinte.
  11. Procédé selon la revendication 10, caractérisé en ce que le courant d'amenée de gaz s'écoule sauf pendant les étapes (b) et (c) de la conduite d'amenée de gaz par le raccord de liaison (10) à l'espace de broyage (4).
  12. Procédé selon l'une quelconque des revendications 10 ou 11, caractérisé en ce que le dispositif de mesure (12) est commuté sauf pendant les étapes (b) et (c) dans un premier état de commutation.
  13. Procédé selon l'une quelconque des revendications 10 à 12, caractérisé en ce que le prélèvement des particules dans l'étape (b) a lieu par commutation du dispositif de mesure (12) dans un deuxième état de commutation, par le fait que le courant d'amenée de gaz s'écoulant depuis la conduite d'amenée de gaz (13) génère une sous-pression pour aspirer un courant de prélèvement de gaz avec les particules qui y sont contenues de l'espace de broyage (4) et pour favoriser la mesure des particules en direction du dispositif de mesure (12).
  14. Procédé selon l'une quelconque des revendications 10 à 13, caractérisé en ce que les particules mesurées sont ramenées après l'étape (c) dans l'espace de broyage (4).
EP18155401.5A 2018-02-06 2018-02-06 Dispositif et procédé de broyage énergique et/ou de pulvérisation de particules Active EP3520899B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18155401.5A EP3520899B1 (fr) 2018-02-06 2018-02-06 Dispositif et procédé de broyage énergique et/ou de pulvérisation de particules
ES18155401T ES2853477T3 (es) 2018-02-06 2018-02-06 Dispositivo y procedimiento para la molienda de alta energía y/o de pulverización de partículas
DK18155401.5T DK3520899T3 (da) 2018-02-06 2018-02-06 Anordning og fremgangsmåde til højenergi- og/eller ultrafinmaling af partikler
KR1020190012836A KR102339136B1 (ko) 2018-02-06 2019-01-31 입자의 고에너지- 및/또는 미세 분쇄를 위한 장치 및 방법

Applications Claiming Priority (1)

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EP18155401.5A EP3520899B1 (fr) 2018-02-06 2018-02-06 Dispositif et procédé de broyage énergique et/ou de pulvérisation de particules

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EP3520899B1 true EP3520899B1 (fr) 2020-12-09

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CN114247880A (zh) * 2022-01-21 2022-03-29 北京科技大学顺德研究生院 一种激光辅助磨削制备球形金属粉末的装置及方法

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US3682399A (en) * 1969-03-25 1972-08-08 Vyzk Ustav Organ Syntez Apparatus for comminuting and dispersing solid particles
CH667222A5 (de) * 1985-07-18 1988-09-30 Buehler Ag Geb Verfahren zum regeln einer ruehrwerksmuehle, und regelvorrichtung zur durchfuehrung des verfahrens.
DE19635500B4 (de) 1996-09-03 2008-01-10 Zoz Gmbh Vorrichtung zur Hochenergie- und/oder Feinstmahlung von Feststoffen und Verfahren zu dessen Betrieb
DE102006054727B3 (de) * 2006-11-21 2008-06-05 Kronos International, Inc. Verfahren zur verbesserten Rührwerksmahlung von Feststoffpartikeln

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ES2853477T3 (es) 2021-09-16
DK3520899T3 (da) 2021-02-01
KR20190095148A (ko) 2019-08-14
EP3520899A1 (fr) 2019-08-07
KR102339136B1 (ko) 2021-12-15

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