EP2704836B1 - Mill and method of milling of material using this mill - Google Patents
Mill and method of milling of material using this mill Download PDFInfo
- Publication number
- EP2704836B1 EP2704836B1 EP11769784.7A EP11769784A EP2704836B1 EP 2704836 B1 EP2704836 B1 EP 2704836B1 EP 11769784 A EP11769784 A EP 11769784A EP 2704836 B1 EP2704836 B1 EP 2704836B1
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- grinding
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- mill according
- grinding container
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- 238000000034 method Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 title description 15
- 238000003801 milling Methods 0.000 title description 2
- 238000000227 grinding Methods 0.000 claims description 76
- 230000008569 process Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 239000002105 nanoparticle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011858 nanopowder Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Images
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
- B02C17/04—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 with unperforated container
- B02C17/08—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 with unperforated container with containers performing a planetary movement
Definitions
- the invention relates to a mill with a motor-driven grinding container and free-moving grinding media therein.
- Such mills are used in particular for the fine grinding of mineral materials, for example for the production of nanoparticles or nanopowders from such materials.
- the efficiency between the introduced energy and the energy actually used for breaking the ground material is unsatisfactory. This results in a high wear of the grinding media and the associated contamination of the ground material.
- the poor efficiency can also have a high temperature development in the millbase, so that an active cooling of the millbase is required to avoid unwanted property changes or reactions of the ground material.
- WO-A-2009/026990 there is disclosed a laboratory vibratory mill with skewed grinding crushers which are rotated about a vertical axis by a drive having a gearbox with a horizontally oriented plane of movement.
- the Mahlbechers in relation to the plane of motion of the oscillating drive conditional trajectories of the grinding media in Mahlbecher the front Mahlbecherböden should be included as a stop and grinding surface in the crushing process.
- the drive is designed with a three-dimensional action. It is thus given a relatively complicated construction with the respective inclined grinding bowl, in addition to that no optimal movements are effected on the grinding media.
- the invention has for its object to avoid these disadvantages and to provide a mill of the type mentioned above, which is characterized by an efficient generation in particular of nanoparticles and by a good energy efficiency.
- the invention further provides that the milling container, which can be rotated about its central axis, is rotated by the drive system of the mill about an axis arranged outside the container. This allows it to be moved in two dimensions with a simple drive. Its circular path is arranged in a horizontal plane. The two-dimensional movement thus takes place along the y-axis and the x-axis, whereby an up and down movement in the z-direction would also be possible.
- the drive system comprises a bearing housing having a drive shaft and a rotary arm, one end of which is rotatably secured to the drive shaft and the other end carries the grinding container, said by means of a gear transmission relative to the rotating arm at the same speed and in opposite Direction of rotation as the turning arm is rotated.
- This causes the grinding container during its rotation about the axis of rotation of the rotary arm at the same time remains unrotatable about its own central axis.
- the cuboid grinding container is expediently formed with 85 ° to 95 ° amount inner angles. To simplify the production, it is advantageous if the grinding container has a rectangular cross-section, wherein the side walls may have a slight curvature toward the container center towards the container center.
- the freely movable grinding media in the grinding container are designed according to the invention as grinding balls, which helps to minimize the friction losses during the grinding process. It is in the sense of an optimized Mahlclients advantageous if the grinding media have a multimodal size distribution. It may also be advantageous in this sense if the number of grinding balls is so dimensioned that their capacity corresponds to about 1/3 of the total contents of the grinding container.
- the mill according to the invention is also distinguished by the fact that its mode of operation is easily adaptable to the grinding process provided in each case. In particular, it is easily possible to drive the grinding container at intervals and / or with alternating changes of direction.
- the grinding container 1 for receiving the ground material is cuboid, with a bottom 2, side walls 3a to 3d and a lid 4, which is removable if necessary.
- the grinding container 1 has flat walls and a rectangular cross-section and is driven by a drive system 5, which is composed of a bearing housing 6 with a drive shaft 7 and a rotary arm 8 with a gear transmission 9a, 9b, 9c.
- the grinding container 1 is provided with a trunnion 10 attached to its bottom 4, which is mounted at the outer end of the rotary arm 8. The latter is attached at its other end to the drive shaft 7 and rotates about the axis A at a rotational speed ⁇ A in a vertical plane on a circular path 11 with radius R. In this case, the grinding container 1 is taken and thereby two-dimensionally in the direction of the y-axis and x-axis moved.
- the grinding container 1 is a number of grinding balls 12 whose size and texture is matched with the ground material, and their capacity corresponds to about 1/3 of the total volume of the grinding container 1. Such a filling amount contributes in practice to optimize the grinding result. It is in this case often advantageous if the grinding balls 12 have a multimodal size distribution.
- the grinding balls are spherical. But they can also be egg-shaped.
- the grinding balls 12 are freely movable in the grinding container 1. Since this is non-rotatable about its central axis B, they are hurled back and forth in operation from wall to wall, without a significant portion of their kinetic energy, for example, by collision of the grinding balls is destroyed.
- the inventive mill thus has a high energy efficiency, which brings not only economic, but also procedural advantages. The latter result from the reduction of friction losses and the associated heat development in the millbase. The avoidance of friction-related impurities and / or heat-related reactions leads to an improvement in the quality of the ground product.
- the two-dimensional trajectory 12 of the grinding container is horizontal. However, it can also be three-dimensional in the context of the invention by subjecting the grinding container to vibrations in the three dimensions.
- the arrangement according to the invention also makes it possible to drive the grinding container at intervals and / or with alternating changes of direction. It is also possible within the scope of the invention to design the cross-section of the grinding container 1 slightly different from the rectangular shape, wherein the inner angle of the container preferably vary between 85 ° and 95 °. It is also possible to provide the grinding container 1 with slightly curved or slightly beveled side walls, which have a curvature or slope towards the container center towards the container bottom.
- the invention further enables the design of the grinding process as a continuous process, namely by simultaneous feeding, pulling out or pressing and sifting out the ground material. in this connection the supply and suction lines are preferably housed in the removable lid 4 of the grinding container 1.
- the inventive mill is particularly suitable for the production of submicron and nanopowder from macroscopic brittle materials, such as in particular diamond, oxides, or carbides, and for the production of composite powders and with nanoparticles and / or nanotubes, especially CNT reinforce materials, the softer Matrix consists mainly of metals, light metals and their alloys or of plastics and / or mixtures thereof.
- the material to be ground should be kept constantly in motion so as to make the grinding process more efficient and avoid caking.
- the invention is sufficiently demonstrated with the illustrated embodiment. Of course, it could still be illustrated by other variants. For example, instead of a gear transmission for driving the mill, toothed belts or the like could be used. With the mill according to the invention also regrind, which has been removed and does not yet have the desired grain size, should be fed again to a grinding process.
- the grinding container is moved on a circular path in a horizontal plane.
- the grinding container could be moved by the drive system of the mill in all three dimensions, for example, is still a parent shaking movement.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Description
Die Erfindung betrifft eine Mühle mit einem motorisch angetriebenen Mahlbehälter und darin frei beweglichen Mahlkörpern.The invention relates to a mill with a motor-driven grinding container and free-moving grinding media therein.
Derartige Mühlen werden insbesondere zum Feinmahlen von mineralischen Werkstoffen, etwa zur Herstellung von Nanopartikeln oder Nanopulvern aus solchen Werkstoffen eingesetzt. Bei den bisher bekannten Mühlen dieser Art ist der Wirkungsgrad zwischen der eingebrachten Energie und der tatsächlich genutzten Energie zum Brechen des Mahlgutes unbefriedigend. Daraus resultiert ein hoher Verschleiss der Mahlkörper und die damit verbundene Verunreinigung des Mahlguts. Der schlechte Wirkungsgrad kann zudem eine hohe Temperaturentwicklung im Mahlgut zufolge haben, so dass eine aktive Kühlung des Mahlguts erforderlich ist, um ungewollte Eigenschaftsveränderungen oder Reaktionen des Mahlgutes zu vermeiden.Such mills are used in particular for the fine grinding of mineral materials, for example for the production of nanoparticles or nanopowders from such materials. In the previously known mills of this type, the efficiency between the introduced energy and the energy actually used for breaking the ground material is unsatisfactory. This results in a high wear of the grinding media and the associated contamination of the ground material. The poor efficiency can also have a high temperature development in the millbase, so that an active cooling of the millbase is required to avoid unwanted property changes or reactions of the ground material.
In der Druckschrift
Gemäss der Druckschrift
Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile zu vermeiden und eine Mühle der eingangs genannten Art zu schaffen, die sich durch ein effizientes Erzeugen insbesondere von Nanopartikeln und durch einen guten energetischen Wirkungsgrad auszeichnet.According to the document
The invention has for its object to avoid these disadvantages and to provide a mill of the type mentioned above, which is characterized by an efficient generation in particular of nanoparticles and by a good energy efficiency.
Diese Aufgabe wird erfindungsgemäss durch die Mühle nach Anspruch 1 und das Verfahren nach Anspruch 11 gelöst. Auf diese Weise wird erreicht, dass die Mahlkörper im Mahlbehälter vorwiegend hin und her von Wand zu Wand geschleudert werden, und zudem auch durch gegenseitiges Zusammenprallen der Mahlkörper. Die Geometrie bewirkt aber eine bessere stochastische Verteilung der Drehmomente der Mahlkörper und reduziert damit ein energievernichtendes Rollen und Schleifen der Mahlkörper.
Entsprechendes gilt auch für die Partikel des Mahlguts, welche mit dieser Mühle sehr effizient zu Nanopartikeln verarbeitet werden können. Ausserdem werden die damit einhergehenden Reibungsverluste herabgesetzt, was auch die Wärmeentwicklung innerhalb des Mahlgutes reduziert.This object is achieved according to the invention by the mill according to claim 1 and the method according to
The same applies to the particles of the millbase, which can be processed very efficiently into nanoparticles with this mill. In addition, the associated friction losses are reduced, which also reduces the heat development within the ground material.
Die Erfindung sieht ferner vor, dass der um seine Mittelachse undrehbare Mahlbehälter durch das Antriebssystem der Mühle um eine ausserhalb des Behälters angeordnete Achse gedreht wird. Dadurch kann er mit einem einfachen Antrieb in zwei Dimensionen bewegt werden. Seine Kreisbahn ist in einer horizontalen Ebene angeordnet. Die zweidimensionale Bewegung erfolgt somit entlang der y-Achse und der x-Achse, wobei auch eine Auf- und Ab-Bewegung in z-Richtung möglich wäre.
Die Erfindung sieht weiterhin vor, dass das Antriebssystem ein Lagergehäuse mit einer Antriebswelle und einem Dreharm aufweist, dessen ein Ende an der Antriebswelle drehfest befestigt ist und dessen andere Ende den Mahlbehälter trägt, wobei dieser mittels eines Zahnradgetriebes relativ zum Dreharm mit gleicher Geschwindigkeit und in entgegengesetzter Drehrichtung wie der Dreharm gedreht wird. Dies bewirkt, dass der Mahlbehälter während seiner Drehung um die Drehachse des Dreharms gleichzeitig um die eigene Mittelachse undrehbar bleibt.
Der quaderförmige Mahlbehälter ist zweckmässigerweise mit 85° bis 95° betragenden Innenwinkeln ausgebildet. Zur Vereinfachung der Fertigung ist es vorteilhaft, wenn der Mahlbehälter einen rechteckigen Querschnitt aufweist, wobei die Seitenwände zum Mahlbehälterboden hin eine leichte Krümmung zur Behältermitte hin aufweisen können.
Die im Mahlbehälter frei beweglichen Mahlkörper sind erfindungsgemäss als Mahlkugeln ausgebildet, was dazu beiträgt, die Reibungsverluste beim Mahlprozess zu minimieren. Es ist im Sinne eines optimierten Mahlergebnisses von Vorteil, wenn die Mahlkörper eine multimodale Grössenverteilung aufweisen. Es kann auch in diesem Sinne vorteilhaft sein, wenn die Anzahl Mahlkugeln so bemessen ist, dass ihre Füllmenge ca. 1/3 des Gesamtinhaltsraumes des Mahlbehälters entspricht.The invention further provides that the milling container, which can be rotated about its central axis, is rotated by the drive system of the mill about an axis arranged outside the container. This allows it to be moved in two dimensions with a simple drive. Its circular path is arranged in a horizontal plane. The two-dimensional movement thus takes place along the y-axis and the x-axis, whereby an up and down movement in the z-direction would also be possible.
The invention further provides that the drive system comprises a bearing housing having a drive shaft and a rotary arm, one end of which is rotatably secured to the drive shaft and the other end carries the grinding container, said by means of a gear transmission relative to the rotating arm at the same speed and in opposite Direction of rotation as the turning arm is rotated. This causes the grinding container during its rotation about the axis of rotation of the rotary arm at the same time remains unrotatable about its own central axis.
The cuboid grinding container is expediently formed with 85 ° to 95 ° amount inner angles. To simplify the production, it is advantageous if the grinding container has a rectangular cross-section, wherein the side walls may have a slight curvature toward the container center towards the container center.
The freely movable grinding media in the grinding container are designed according to the invention as grinding balls, which helps to minimize the friction losses during the grinding process. It is in the sense of an optimized Mahlergebnisses advantageous if the grinding media have a multimodal size distribution. It may also be advantageous in this sense if the number of grinding balls is so dimensioned that their capacity corresponds to about 1/3 of the total contents of the grinding container.
Die erfindungsgemässe Mühle zeichnet sich auch dadurch aus, dass ihre Betriebsweise leicht dem jeweils vorgesehenen Mahlprozess anpassbar ist. Es ist insbesondere leicht möglich, den Mahlbehälter intervallartig und/oder mit alternierenden Richtungswechseln anzutreiben.The mill according to the invention is also distinguished by the fact that its mode of operation is easily adaptable to the grinding process provided in each case. In particular, it is easily possible to drive the grinding container at intervals and / or with alternating changes of direction.
Durch gleichzeitiges Zuführen, Herausziehen oder -drücken sowie Aussieben des Mahlguts ist es nach der Erfindung möglich, das Mahlverfahren als kontinuierlich ablaufendes Verfahren zu gestalten. Zuführ- und Absaugleitungen sind hierbei vorzugsweise im Deckel des Mahlbehälters angeordnet.By simultaneous feeding, pulling or pressing and screening of the ground material, it is possible according to the invention to design the grinding process as a continuously running process. Supply and suction lines are preferably arranged in the lid of the grinding container.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- den Mahlbehälter samt Antrieb einer erfindungsgemäss Mühle, in der Seitenansicht und schematisch dargestellt, und
- Fig. 2
- einen Schnitt entlang der Linie II-II in
Fig. 1 , ebenfalls schematisch dargestellt.
- Fig. 1
- the grinding container including drive a mill according to the invention, in the side view and shown schematically, and
- Fig. 2
- a section along the line II-II in
Fig. 1 , also shown schematically.
Wie aus
Der Mahlbehälter 1 ist mit einem an seinem Boden 4 befestigten Tragzapfen 10 versehen, der am äusseren Ende des Dreharmes 8 gelagert ist. Letzterer ist an seinem anderen Ende an der Antriebswelle 7 befestigt und dreht sich um deren Achse A mit Drehgeschwindigkeit ωA in einer vertikalen Ebene auf einer Kreisbahn 11 mit Radius R. Dabei wird der Mahlbehälter 1 mitgenommen und dadurch zweidimensional in Richtung der y-Achse und der x-Achse mitbewegt. Gleichzeitig bewirkt das Zahnradgetriebe 9a, 9b, 9c, dass der Mahlbehälter 1 um seine Mittelachse B undrehbar bleibt, indem er relativ zum Dreharm 8 mit gleicher Drehgeschwindigkeit ωB = ωA aber in entgegengesetzter Drehrichtung wie der Dreharm 8 gedreht wird.The grinding container 1 is provided with a
Im Mahlbehälter 1 befindet sich eine Anzahl Mahlkugeln 12, deren Grösse und Beschaffenheit mit der des Mahlguts abgestimmt ist, und deren Füllmenge ca. 1/3 des Gesamtinhaltsvolumens des Mahlbehälters 1 entspricht. Eine solche Füllmenge trägt in der Praxis dazu bei, das Mahlergebnis zu optimieren. Es ist hierbei vielfach vorteilhaft, wenn die Mahlkugeln 12 eine multimodale Grössenverteilung aufweisen. Die Mahlkugeln sind sphärisch ausgebildet. Sie können aber auch eiförmig sein.In the grinding container 1 is a number of
Die Mahlkugeln 12 sind im Mahlbehälter 1 frei beweglich. Da dieser um seine Mittelachse B undrehbar ist, werden sie darin im Betrieb von Wand zu Wand hin und her geschleudert, ohne dass ein nennenswerter Anteil ihrer kinetischen Energie etwa durch Zusammenprallen der Mahlkugeln vernichtet wird. Die erfindungsgemässe Mühle hat dadurch einen hohen energetischen Wirkungsgrad, der nicht nur wirtschaftliche, sondern auch verfahrenstechnische Vorteile mit sich bringt. Letztere resultieren aus der Verringerung der Reibungsverluste und der damit einhergehenden Wärmeentwicklung im Mahlgut. Die Vermeidung von reibungsbedingten Verunreinigungen und/oder wärmebedingten Reaktionen führt zu einer Qualitätsverbesserung des gemahlenen Produkts.
Beim beschriebenen Ausführungsbeispiel ist die zweidimensionale Bewegungsbahn 12 des Mahlbehälters waagerecht. Sie kann aber auch im Rahmen der Erfindung dreidimensional sein, indem der Mahlbehälter Schwingungen in den drei Dimensionen ausgesetzt wird. Die erfindungsgemässe Anordnung ermöglicht es auch, den Mahlbehälter intervallartig und /oder mit alternierenden Richtungswechseln anzutreiben.
Es ist auch im Rahmen der Erfindung möglich, den Querschnitt des Mahlbehälters 1 leicht abweichend von der rechteckigen Form auszugestalten, wobei die Innenwinkel des Behälters vorzugsweise zwischen 85° und 95° variieren. Es ist auch möglich, den Mahlbehälter 1 mit leicht gekrümmten bzw. leicht angeschrägten Seitenwänden zu versehen, die zum Behälterboden hin eine Krümmung bzw. Schräge zur Behältermitte hin aufweisen.
Die Erfindung ermöglicht ferner die Ausgestaltung des Mahlverfahrens als kontinuierliches Verfahren, nämlich durch gleichzeitiges Zuführen, Herausziehen oder -drücken sowie Aussieben des Mahlguts. Hierbei sind die Zuführ- und Absaugleitungen vorzugsweise im abnehmbaren Deckel 4 des Mahlbehälters 1 untergebracht.The
In the described embodiment, the two-
It is also possible within the scope of the invention to design the cross-section of the grinding container 1 slightly different from the rectangular shape, wherein the inner angle of the container preferably vary between 85 ° and 95 °. It is also possible to provide the grinding container 1 with slightly curved or slightly beveled side walls, which have a curvature or slope towards the container center towards the container bottom.
The invention further enables the design of the grinding process as a continuous process, namely by simultaneous feeding, pulling out or pressing and sifting out the ground material. in this connection the supply and suction lines are preferably housed in the removable lid 4 of the grinding container 1.
Zur Verminderung von Pulverablagerungen an den Wänden und Ecken des Behälters ist es zweckmässig, entsprechende Fluidisierungseinrichtungen vorzugsweise in Ecken und Boden des Behälters einzubauen.To reduce powder deposits on the walls and corners of the container, it is expedient to install corresponding fluidizing devices preferably in the corners and bottom of the container.
Die erfindungsgemässe Mühle eignet sich besonders für die Herstellung von Submikron- und Nanopulvern aus makroskopischen spröden Werkstoffen, wie insbesondere Diamant, Oxide, oder Karbide, sowie für die Herstellung von Kompositpulvern und mit Nanopartikeln und/oder Nanotubes, insbesondere CNT verstärken Werkstoffen, wobei die weichere Matrix vor allem aus Metallen, Leichtmetallen und deren Legierungen oder aus Kunststoffen und/oder deren Mischungen besteht.The inventive mill is particularly suitable for the production of submicron and nanopowder from macroscopic brittle materials, such as in particular diamond, oxides, or carbides, and for the production of composite powders and with nanoparticles and / or nanotubes, especially CNT reinforce materials, the softer Matrix consists mainly of metals, light metals and their alloys or of plastics and / or mixtures thereof.
Mit dieser Mühle kann auch ein Mahlen unter Schutzgas, Vakuum oder reaktiven und /oder angeregten, wie beispielsweise plasmaaktivierten oder teilionisierten Gasen erfolgen. Letzteres würde die kontrollierte Herstellung von Submicron-Pulvern bzw. Nanopulvern aus Nitriden, Karbiden, Oxiden entsprechender Metalle, Metalllegierungen und/oder Mischungen erlauben, bis hin zur Herstellung von komplexen, nanostrukturierten Pulvern. Man vermischt Metalle, die zum einen eine hohe Reaktivität zu Sauerstoff, Kohlenstoff bzw. Stickstoff haben (Ti, Ta, W, Al etc.), mit Metallen geringerer Reaktivität (Ni, Cu, Ag etc.). Dadurch kann man auf der einen Seite die Härte und auf der anderen Seite die Zähigkeit eines Werkstoffes gezielt beeinflussen.With this mill, grinding under protective gas, vacuum or reactive and / or excited, such as plasma-activated or partially ionized gases can be carried out. The latter would allow the controlled production of submicron powders or nanopowders from nitrides, carbides, oxides of corresponding metals, metal alloys and / or mixtures, up to the production of complex nanostructured powders. It mixes metals that have a high reactivity to oxygen, carbon or nitrogen (Ti, Ta, W, Al, etc.), with metals of lower reactivity (Ni, Cu, Ag, etc.). As a result, it is possible to influence the hardness on the one hand and the toughness of a material on the other.
Das Mahlgut soll möglichst ständig in Bewegung gehalten werden, um so den Mahlprozess effizienter zu gestalten und Anbackungen zu vermeiden.
Die Erfindung ist mit dem erläuterten Ausführungsbeispiel ausreichend dargetan. Selbstverständlich könnte sie noch durch andere Varianten veranschaulicht sein. So könnten beispielsweise anstelle eines Zahnradgetriebes für den Antrieb der Mühle auch Zahnriemen oder ähnliches verwendet werden.
Mit der erfindungsgemässen Mühle soll auch Mahlgut, welches entnommen worden ist und noch nicht die gewünschte Korngrösse aufweist, nochmals einem Mahlprozess zugeführt werden.The material to be ground should be kept constantly in motion so as to make the grinding process more efficient and avoid caking.
The invention is sufficiently demonstrated with the illustrated embodiment. Of course, it could still be illustrated by other variants. For example, instead of a gear transmission for driving the mill, toothed belts or the like could be used.
With the mill according to the invention also regrind, which has been removed and does not yet have the desired grain size, should be fed again to a grinding process.
Der Mahlbehälter wird auf einer Kreisbahn in einer horizontalen Ebene bewegt.
Der Mahlbehälter könnte durch das Antriebssystem der Mühle in allen drei Dimensionen bewegt werden, indem beispielsweise noch eine Rüttelbewegung übergeordnet ist.The grinding container is moved on a circular path in a horizontal plane.
The grinding container could be moved by the drive system of the mill in all three dimensions, for example, is still a parent shaking movement.
Claims (11)
- Mill with a motor-driven grinding container (1) and therein freely movable grinding bodies (12), whereby the grinding container (1) is approximately cuboid formed and is movable in two dimensions by the drive system (5) with a drive shaft (7) of the mill, characterized in that
the grinding container (1) is provided with a trunnion (10) secured on its ground (4), which is pivoted on the outer end of a rotating arm (8), whereas the rotating arm (8) is secured on the drive shaft (7) on its other end and is rotating around the axis (A) of the drive shaft (7), whereby this axis (A) is situated in a vertical plane, and the grinding container (1) is moveable outside of this axis (A) on an orbit (11) in a horizontal plane while he is unrotatable on his central axis (B), as he is rotating relatively to the rotating arm (8) with the same rotational speed (ωB=ωA), but in opposite direction of rotation like the rotating arm (8). - Mill according to claim 1, characterized in that the drive system (5) has a bearing housing (6) with the drive shaft (7) and the rotating arm (8), its one end is fixed to the drive shaft (7) and its other end carries the grinding container (1), whereby this is rotated relatively to the rotary arm (8) with the same rotational speed and in the opposite direction of rotation like the rotary arm by means of a gear transmission (9a, 9b, 9c).
- Mill according to claim 1 or 2, characterized in that the grinding container (1) is formed with inner angles amounting preferably 85° to 95°.
- Mill according to claim 3, characterized in that the grinding container (1) has a rectangular cross-section.
- Mill according to claim 4, characterized in that the side walls (3a to 3d) of the grinding container (1) having a slight curvature to the container bottom (2) towards respective bevelling towards the center of the container.
- Mill according to any one of the preceding claims 1 to 5, characterized in that the number of grinding media is so dimensioned that its capacity corresponds to about 1/3 of the total content space of the grinding container (1).
- Mill according to any one of the preceding claims 1 to 6, characterized in that the grinding bodies (12) having a multi-modal size distribution.
- Mill according to any one of the preceding claims 1 to 7, characterized in that the grinding bodies (12) freely movable in the grinding container (1) are designed as grinding balls.
- Mill according to claim 1, characterized in that the grinding container (1) is movable at intervals and with alternating directional changes.
- Mill according to any one of the claims 1 to 9, characterized in that grinding is carried out under protective gas, vacuum or reactive and/or excited gases.
- Process for grinding mill feed with a mill according to the preceding claims 1 to 10, characterized by simultaneous feeding, pulling out or squeezing as well as screening of the mill feed, whereby feeding and suction conduits are preferably arranged in the lid (4) of the grinding container (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH16442010A CH704018B1 (en) | 2010-10-07 | 2010-10-07 | Mill and process for grinding mill base with the same. |
PCT/EP2011/004957 WO2012045446A2 (en) | 2010-10-07 | 2011-10-05 | Mill and method for grinding material to be ground using the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2704836A2 EP2704836A2 (en) | 2014-03-12 |
EP2704836B1 true EP2704836B1 (en) | 2018-06-27 |
Family
ID=44799978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11769784.7A Active EP2704836B1 (en) | 2010-10-07 | 2011-10-05 | Mill and method of milling of material using this mill |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2704836B1 (en) |
CH (1) | CH704018B1 (en) |
WO (1) | WO2012045446A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL406540A1 (en) * | 2013-12-16 | 2015-06-22 | Politechnika Krakowska im. Tadeusza Kościuszki | Drive for the ultraenergy pulsatory-rotating mill |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009026990A1 (en) * | 2007-07-14 | 2009-03-05 | Retsch Gmbh | Laboratory vibration grinding mill having inclined grinding beakers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE624660C (en) * | 1934-06-21 | 1936-01-25 | Wilhelm Mauss | Device for grinding ores and similar materials in vertical drums |
US2561037A (en) | 1945-08-14 | 1951-07-17 | William T Stanley | Finishing method and apparatus |
FR1084223A (en) * | 1953-05-28 | 1955-01-18 | Ct D Etudes Et De Rech S De L | Ball mill |
ITRM20070364A1 (en) * | 2007-06-27 | 2008-12-28 | Assing S P A | NEW INDUSTRIAL MILL TO FRICTION TO PRODUCE NANOMATERIALS THROUGH MECHANIZATIONAL PROCESSES |
-
2010
- 2010-10-07 CH CH16442010A patent/CH704018B1/en not_active IP Right Cessation
-
2011
- 2011-10-05 WO PCT/EP2011/004957 patent/WO2012045446A2/en active Application Filing
- 2011-10-05 EP EP11769784.7A patent/EP2704836B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009026990A1 (en) * | 2007-07-14 | 2009-03-05 | Retsch Gmbh | Laboratory vibration grinding mill having inclined grinding beakers |
Also Published As
Publication number | Publication date |
---|---|
CH704018A2 (en) | 2012-04-13 |
EP2704836A2 (en) | 2014-03-12 |
WO2012045446A2 (en) | 2012-04-12 |
CH704018B1 (en) | 2014-08-29 |
WO2012045446A3 (en) | 2012-06-07 |
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