EP1419823A2 - Spiral jet mill - Google Patents
Spiral jet mill Download PDFInfo
- Publication number
- EP1419823A2 EP1419823A2 EP03025553A EP03025553A EP1419823A2 EP 1419823 A2 EP1419823 A2 EP 1419823A2 EP 03025553 A EP03025553 A EP 03025553A EP 03025553 A EP03025553 A EP 03025553A EP 1419823 A2 EP1419823 A2 EP 1419823A2
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- EP
- European Patent Office
- Prior art keywords
- grinding
- housing
- jet mill
- spiral jet
- wear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B02C19/06—Jet mills
- B02C19/061—Jet mills of the cylindrical type
Definitions
- the invention relates to a grinding housing of a spiral jet mill and a modular spiral jet mill with improved wear protection.
- Spiral jet mills are known per se and are used for fine grinding or Deagglomeration of solid particles used.
- a number of previous ones Constructions are described in detail in US 2,032,827. They exist usually from a flat cylindrical grinding chamber, one inside directed circular or spiral flow of a gas or gaseous fluids transported the regrind particles.
- the particle crushing essentially occurs through collision of the particles with each other.
- the for Crushing required energy is supplied via the gaseous medium, that in many common designs tangential with jet nozzles that over are distributed around the circumference, is blown into the grinding chamber and thus one Eddies created and maintained.
- the regrind is separated Feed fed into the grinding chamber.
- the grinders can both be placed horizontally and vertically. Compressed air or is usually used as the propellant Steam used.
- the known jet mills for example according to DE 76 17 063 U1, are in the Principle constructed so that it is in a closed steel housing consisting of bottom, outer wall and lid only an inner steel ring located.
- the actual grinding chamber is located inside the steel ring and is made by steel ring and the corresponding surfaces of floor and Cover limited.
- the propellant gas is introduced and through several nozzles through the inner steel ring into the grinding chamber.
- the generated Change the grinding quality and the product is contaminated by abrasion.
- a hard, wear-resistant lining protected against abrasion.
- a suitable wear-resistant material for example hard metal, aluminum oxide, silicon carbide or boron carbide or also - as in GB 1 222 257 - Teflon, nylon or polyurethane.
- the lining and mill housing are usually connected by Deposition welding of, for example, hard metal or another type of non-positive connection such as screwing, gluing or Spot welding.
- Jet mills with renewable or interchangeable linings are known from the literature, for example from US Pat. No. 2,032,827, GB 636,503 and GB 1,222,257.
- the wear-resistant lining in the form of plates is described, for example, in US Pat. No. 2,690,880.
- the annular grinding chamber wall of this spiral jet mill is lined with single plates, which can consist of a wear-resistant alloy and are screwed to the housing wall.
- DE-GM 7300113 presents a vertical jet mill which is completely lined on the inside with a large number of flat plates made of wear-resistant material.
- the plates are preferably made of boron carbide (BC) or silicon carbide (SiC) and glued or welded to the mill housing.
- the preferred wear-resistant materials such as carbides, nitrides or hard metal are very brittle. Due to the different thermal expansion behavior of the different materials in the housing and lining, wear protection can quickly break. In addition, because of the different moduli of elasticity of the carrier and coating material, there is a risk that the coated parts will react easily with cracking when stressed, which leads to chipping of the wear layer.
- the invention has for its object to a spiral jet mill Crushing powdery materials to provide wear resistant and moreover largely shockproof and is insensitive to thermal shock, reduced repair work requires and provides improved grinding quality.
- the invention also relates to a spiral jet mill with a steel outer housing, in which a pressure-resistant and completely wear-resistant material grinding housing is incorporated, which has the following advantages over the known technical solutions: significantly longer service life, shorter repair times, easy cleaning, stress-free assembly, achieving a reproducible grinding quality after the repair due to the recoverable mill geometry, use of different wear-resistant materials - also in combination - adapted to the requirements of the regrind.
- the jet mill according to the invention is constructed from an outer housing and a grinding housing freely embedded in the outer housing. Both the outer housing and the grinding housing are separate and - apart from the supply and discharge lines - a self-contained housing.
- the marking "freely stored" means that the grinding housing and the outer housing are not firmly connected.
- the outer housing is made of steel.
- the grinding housing on the other hand, consists entirely of wear-resistant material and is characterized by a special construction.
- the housing itself consists of two layers: the first of a carrier material, usually steel, and the second of a lining of wear-resistant material applied to the inside of the carrier material.
- the grinding housing according to the invention is made entirely of a wear-resistant material.
- carbides such as tungsten carbide (e.g. WC-Co alloy known as Widia®), silicon carbide, boron carbide or other suitable carbides as well as nitrides, borides or other ceramics or hard metal are suitable.
- the wear-resistant materials can also be used in combination with one another. This construction is only possible because the grinder housing is self-supporting, without a fixed connection and stored tension-free in the outer housing.
- the grinder housing consists of at least four parts. With one horizontal erected mill these are the bottom, the annular side wall, the Cover with the molded product discharge nozzle and the Feed nozzle. The lid is next to the Product discharge nozzle the opening for the regrind entry. Ground, Side wall, cover and grist inlet connection touch non-positive without a special seal. The entire multi-part The grinding housing is tension-free inside the outer housing. The mill can also be set up vertically.
- the space between the outer casing and the grinder casing side wall serves as an annular high pressure propellant gas duct.
- the propellant is over a or several nozzles first in the annular propellant gas channel between Outer and inner housing and further through simple holes in the ring of the Grinder housing (grinding chamber wall) in the interior of the grinder housing Grinding chamber, directed. It is never necessary to use the holes to line a special wear protection or special Sealing measures to be taken, as is the case with the known mills is necessary because there are nozzles installed.
- the pressure-resistant grinder is made using screws or clips on the outer circumference of the outer case.
- the screw connection or the stapling has the Advantage that the grinder for cleaning or maintenance work very easily and can be opened and closed very quickly.
- the individual parts of the Grinder housings are simply lifted out or inserted.
- the propellant gas duct is also directly accessible and can be used without any problems getting cleaned.
- the individual parts of the wear-resistant grinding housing - bottom, side wall, Lid - can also be further divided into segments if the one-piece Manufactured from sintered material due to the large format of the parts Problems.
- the segments are joined together so that the Grinding housing is tight in itself and is tension-free in the outer housing.
- the propellant gas is preferably introduced into the grinding chamber through simple bores
- the use of nozzles, especially Laval nozzles is also possible.
- the nozzles are installed using known techniques; For example, special plugs with threaded holes can be used to receive the nozzles.
- High-tension steam, air or other gases can be used as the gas.
- the pressure (up to approx. 35 bar) and the temperature (up to approx. 350 ° C) have to be matched to the respective regrind and the desired fineness.
- the surface of the grinder housing interior can be designed as desired. In the general case it is smooth. Under certain grinding conditions it is for the grinding quality advantageous, the surface on the base plate or on the other interior surfaces and structured in the grist inlet to execute, d. H. with grooves, grooves, waves, nubs or the like Mistake. For example, it has been used in the fine grinding of titanium dioxide pigments found that through such a structured Grinding chamber surface the optical properties of the pigment such as the gloss can be influenced.
- the spiral jet mill is advantageously used for fine grinding of titanium dioxide pigment particles, using high-tension steam as propellant becomes.
- the grinder is equally suitable, other materials fine to grind like pigments and dyes in general or other materials like inorganic and metal oxides, toners, mineral fillers (carbonate, Chalk, talc etc.), detergents, pharmaceuticals, food, cosmetics, Fertilizers, herbicides, pesticides, insecticides, fungicides, sewage sludge etc.
- FIG. 1 shows a top view of the spiral jet mill according to the invention
- the propellant gas supply (4) is marginal through the outer housing (13, 14) into the propellant gas duct (5).
- the Side wall of the grinder housing, the grinder housing ring (8) is with holes (6) for introducing propellant into the grinding chamber (7).
- FIG. 2a the section AB is shown as Exploded view shown.
- Figure 2b shows the detail X from Figure 2a.
- the outer steel housing is designed as a shell (14) and cover (13) molded product discharge nozzle (18) and regrind / injector gas inlet nozzle ((20) shown in Figure 3a).
- the one in it Grinding housing made of wear-resistant material, consists of floor (10), ring (8) and cover (9) also with molded Product discharge nozzle (9a) and from the regrind inlet nozzle, which in Figure 3a / b is shown.
- Between the outer shell (14) or cover (13) and Grinding housing ring (8) is the propellant gas duct (5).
- Inside the The grinding chamber (7) is located in the grinding housing. Only during the Assembling the break-sensitive grinding housing cover (9) on Product discharge nozzle (18) positioned with fixing screws.
- the propellant gas supply (4) in the propellant gas channel (5) can be via or several discharge nozzles are made.
- the feed is advantageously carried out over several supply lines to the required amount of gas without problems and without being able to discharge into the propellant gas duct.
- FIG 1 shows how the grinder housing ring (8) relative to the grinder housing base ((10) in Figure 2a) with the help of a fixing pin (16) which is in a recess of Grinder housing ring (8) and outer housing base (14) is loosely inserted, fixed becomes.
- the outer housing cover (13) can then without the mill would have to be opened by up to 180 ° in relation to the grinding chamber ring (8) are rotated so that different geometrical arrangements of Grist input for propellant gas injection into the grinding chamber can be set.
- the number of holes or nozzles (6) depends on Grinding chamber diameter. For example, with a smaller one Diameter of e.g. 200 mm with 4 nozzles and for larger diameters of about 1000 mm with 16 nozzles. However, there are others Combinations possible.
- the angle of attack of the holes (6) in the Grinding housing ring wall (8) is in view of the material to be ground and the desired grinding quality selected. The expert knows the relationships between nozzle or bore angle, number of nozzles, LPG pressure, throughput etc. and fineness of the different Products. Due to the modular structure of the overall mill and the Grinder housing in particular, the angle of attack as the number of Bores or nozzles by exchanging the grinding housing ring or individual ones Segments can be easily changed.
- the contact surfaces of the individual parts of the grinding housing (8, 9, 10) are self-sealing ground with each other.
- the seal between Grinder housing ring (8) and outer housing shell (14) and outer housing cover (13) is carried out with the aid of a seal (11), for example a graphite seal.
- a seal for example a graphite seal.
- the surface tolerances of the Outer housing and the grinding housing by one to two orders of magnitude. Therefore, it is advantageous, but not necessary, between Grinding case bottom (10) and outer case bottom (14) or between Grinder housing cover (9) and outer housing cover (13) each have a compensating film (12) insert, which creates a positive connection.
- the whole The grinder is assembled on the outer circumference using screw clamps (15) held.
- Figure 3a shows a side view of the regrind entry along section CD.
- Figure 3b shows the detail Y from Figure 3a. In the version shown, this becomes grinding material (1) fed via a funnel and using the Injector gas flow (3) introduced obliquely into the grinding chamber (7).
- the wear-resistant regrind inlet nozzle (19) is loose in the inlet nozzle of the outer housing (20) inserted socket executed only during the Installation process is positioned with a fixing screw.
- the jet mill according to the invention is insensitive to thermal shock and largely pressure shock resistant.
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Abstract
Description
Die Erfindung betrifft ein Mahlgehäuse einer Spiralstrahlmühle und eine modular aufgebaute Spiralstrahlmühle mit verbessertem Verschleißschutz.The invention relates to a grinding housing of a spiral jet mill and a modular spiral jet mill with improved wear protection.
Spiralstrahlmühlen an sich sind bekannt und werden zur Feinstmahlung oder Deagglomeration von festen Partikeln eingesetzt. Eine Anzahl von früheren Konstruktionen sind ausführlich in der US 2 032 827 beschrieben. Sie bestehen üblicherweise aus einem flachzylindrischen Mahlraum, in dem eine nach innen gerichtete kreisförmige oder spiralförmige Strömung eines Gases oder gasförmigen Fluids die Mahlgutpartikel transportiert. Die Teilchenzerkleinerung erfolgt im wesentlichen durch Kollision der Partikel untereinander. Die zum Zerkleinern erforderliche Energie wird über das gasförmige Medium zugeführt, das in vielen gebräuchlichen Ausführungen tangential mit Strahldüsen, die über den Umfang verteilt sind, in die Mahlkammer eingeblasen wird und damit einen Wirbel erzeugt und aufrechterhält. Das Mahlgut wird über eine separate Zuführung in die Mahlkammer eingespeist. Die Mühlen können sowohl horizontal wie vertikal aufgestellt sein. Als Treibgas wird meist Pressluft oder Dampf eingesetzt.Spiral jet mills are known per se and are used for fine grinding or Deagglomeration of solid particles used. A number of previous ones Constructions are described in detail in US 2,032,827. They exist usually from a flat cylindrical grinding chamber, one inside directed circular or spiral flow of a gas or gaseous fluids transported the regrind particles. The particle crushing essentially occurs through collision of the particles with each other. The for Crushing required energy is supplied via the gaseous medium, that in many common designs tangential with jet nozzles that over are distributed around the circumference, is blown into the grinding chamber and thus one Eddies created and maintained. The regrind is separated Feed fed into the grinding chamber. The grinders can both be placed horizontally and vertically. Compressed air or is usually used as the propellant Steam used.
Die bekannten Strahlmühlen, beispielsweise nach DE 76 17 063 U1, sind im Prinzip so aufgebaut, dass sich in einem geschlossenen Stahlgehäuse bestehend aus Boden, Außenwand und Deckel nur ein innerer Stahlring befindet. Die eigentliche Mahlkammer befindet sich im Inneren des Stahlrings und wird durch Stahlring und die entsprechenden Oberflächen von Boden und Deckel begrenzt. In den ringförmigen Raum zwischen Gehäuse-Außenwand und innerem Stahlring wird das Treibgas eingeleitet und über mehrere Düsen durch den inneren Stahlring in die Mahlkammer geführt.The known jet mills, for example according to DE 76 17 063 U1, are in the Principle constructed so that it is in a closed steel housing consisting of bottom, outer wall and lid only an inner steel ring located. The actual grinding chamber is located inside the steel ring and is made by steel ring and the corresponding surfaces of floor and Cover limited. In the annular space between the outer wall of the housing and the inner steel ring, the propellant gas is introduced and through several nozzles through the inner steel ring into the grinding chamber.
Je nach Art des zu zerkleinernden Materials tritt im Inneren der Mühle durch
Abrasion Verschleiß auf und erfordert deswegen erhöhten
Instandhaltungsaufwand. Infolge des Verschleißes kann sich die erzeugte
Mahlqualität verändern, und das Produkt wird durch Abrieb verunreinigt.
Üblicherweise wird deswegen die Oberfläche der Mahlkammer innen mit einer
harten, verschleißfesten Auskleidung gegen Abrasion geschützt. Je nach
Einsatzzweck wählt man einen geeigneten verschleißfesten Werkstoff,
beispielsweise Hartmetall, Aluminiumoxid, Siliciumcarbid oder Borcarbid oder
auch - wie in der GB 1 222 257 - Teflon, Nylon oder Polyurethan. Die
Verbindung von Auskleidung und Mühlengehäuse erfolgt üblicherweise durch
Auftragschweißen von beispielweise Hartmetall oder durch eine andere Art von
kraftschlüssiger Verbindung wie Verschrauben, Verkleben oder
Punktschweißen.Depending on the type of material to be shredded, it passes inside the mill
Abrasion wear on and therefore requires increased
Maintenance. As a result of wear, the generated
Change the grinding quality and the product is contaminated by abrasion.
Usually the surface of the grinding chamber is therefore covered with a
hard, wear-resistant lining protected against abrasion. Depending on
Use a suitable wear-resistant material,
for example hard metal, aluminum oxide, silicon carbide or boron carbide or
also - as in
Beim Auftragschweißen von Hartmetall auf z.B. eine Stahlgrundplatte treten
bekanntermaßen thermische Verspannungen und Verformungen in der
Grundplatte auf. Die erzeugte Hartmetall-Oberfläche ist unregelmäßig und vor
allem in Bezug auf die Oberflächenbeschaffenheit nicht reproduzierbar
herstellbar.
Zur Reparatur der Auskleidung muss entweder die verschlissene
Hartmetallbeschichtung ausgebessert oder die Beschichtung zunächst entfernt
und anschließend eine neue Auftragschweißung vorgenommen werden. In
beiden Fällen treten innere Spannungen und Verformungen auf, so dass es
kaum möglich ist, die exakte Mühlengeometrie bzw. Oberflächenbeschaffenheit
wieder herzustellen. Insgesamt ist die Reparatur aufwändig und zeitintensiv.When hard metal is welded onto a steel base plate, for example, thermal stresses and deformations are known to occur in the base plate. The hard metal surface produced is irregular and, especially with regard to the surface quality, cannot be reproducibly produced.
To repair the lining, either the worn hard metal coating has to be repaired or the coating has to be removed first and then a new weld overlay has to be carried out. In both cases, internal stresses and deformations occur, so that it is hardly possible to restore the exact mill geometry or surface quality. Overall, the repair is complex and time-consuming.
Strahlmühlen mit erneuerbaren oder austauschbaren Auskleidungen sind aus
der Literatur bekannt, beispielsweise aus den US 2 032827, GB 636 503 und
GB 1 222 257. Die verschleißfeste Auskleidung in Form von Platten wird
beispielsweise in der US 2 690 880 beschrieben. Die ringförmige
Mahlraumwandung dieser Spiralstrahlmühle ist mit Einzel-Platten ausgekleidet,
die aus einer verschleißfesten Legierung bestehen können und mit der
Gehäusewand verschraubt sind. In der DE-GM 7300113 wird eine
Vertikalstrahlmühle vorgestellt, die innen vollständig mit einer Vielzahl von
flachen Platten aus verschleißfestem Material ausgekleidet ist. Die Platten sind
bevorzugt aus Borcarbid (BC) oder Siliciumcarbid (SiC) gefertigt und flächig mit
dem Mühlengehäuse verklebt oder verschweißt. Die DE 299 09 743 U1
beschreibt eine horizontal aufgestellte Spiralstrahlmühle in Modulbauweise, die
nur punktuell mit Verschleißschutz ausgekleidet ist und bei der das Treibgas
teilweise über einen Belüftungsboden in die Mahlkammer eingeleitet wird.
Allen genannten Ausführungen ist weiterhin gemeinsam, dass die Strahldüsen,
die in der ringförmigen Mahlraumwandung sitzen und durch die das Hochdruck-Treibgas
eingeleitet wird, durch den zweischichtigen Aufbau der
Mahlraumwandung (bestehend aus Stahlring und Innenauskleidung)
hindurchführen und selbst verschleißfest ausgeführt sein müssen,
beispielsweise aus Keramik. Die Düsendurchführung muss überdies druckdicht
ausgeführt sein. Bei jeder Reparatur der Mahlkammerauskleidung müssen die
Düsen zudem ausgebaut und anschließend wieder eingebaut werden.Jet mills with renewable or interchangeable linings are known from the literature, for example from US Pat. No. 2,032,827, GB 636,503 and GB 1,222,257. The wear-resistant lining in the form of plates is described, for example, in US Pat. No. 2,690,880. The annular grinding chamber wall of this spiral jet mill is lined with single plates, which can consist of a wear-resistant alloy and are screwed to the housing wall. DE-GM 7300113 presents a vertical jet mill which is completely lined on the inside with a large number of flat plates made of wear-resistant material. The plates are preferably made of boron carbide (BC) or silicon carbide (SiC) and glued or welded to the mill housing. DE 299 09 743 U1 describes a horizontally installed spiral jet mill in modular design, which is only lined with wear protection at certain points and in which the propellant gas is partly introduced into the grinding chamber via a ventilation floor.
All of the above-mentioned designs also have in common that the jet nozzles, which are located in the ring-shaped grinding chamber wall and through which the high-pressure propellant gas is introduced, must pass through the two-layer structure of the grinding chamber wall (consisting of a steel ring and inner lining) and must themselves be designed to be wear-resistant, for example ceramics. The nozzle bushing must also be pressure-tight. Each time the grinding chamber lining is repaired, the nozzles must also be removed and then reinstalled.
Zusätzlich zu der abrasiven Belastung des Mühleninneren tritt bei der
Verwendung von hochgespanntem Dampf mit Temperaturen von bis zu 350° C
- beispielsweise bei der Feinmahlung von Titandioxidpigment - beim Anfahren
der Mühle eine signifikante thermische Belastung auf. Die bevorzugt
eingesetzten verschleißfesten Werkstoffe wie Carbide, Nitride oder Hartmetall
sind bekanntermaßen sehr spröde. Aufgrund des unterschiedlichen
Wärmedehnungsverhalten der verschiedenen Werkstoffe in Gehäuse und
Auskleidung kann es daher schnell zum Bruch des Verschleißschutzes
kommen.
Außerdem besteht wegen der unterschiedlichen Elastizitätsmoduln von Trägerund
Beschichtungsmaterial die Gefahr, dass die beschichteten Teile bei
Beaufschlagung mit Spannung leicht mit Rissbildung reagieren, was zu einem
Abplatzen der Schleißschicht führt.In addition to the abrasive stress on the inside of the mill, the use of high-tension steam at temperatures of up to 350 ° C - for example when fine grinding titanium dioxide pigment - causes a significant thermal load when the mill is started up. As is known, the preferred wear-resistant materials such as carbides, nitrides or hard metal are very brittle. Due to the different thermal expansion behavior of the different materials in the housing and lining, wear protection can quickly break.
In addition, because of the different moduli of elasticity of the carrier and coating material, there is a risk that the coated parts will react easily with cracking when stressed, which leads to chipping of the wear layer.
Der Erfindung liegt die Aufgabe zugrunde, eine Spiralstrahlmühle zum Zerkleinern von pulverförmigen Materialien bereitzustellen, die verschleißfest und darüber hinaus weitestgehend druckstoßfest und thermoschockunempfindlich ist, verminderten Instandsetzungsaufwand erfordert und eine verbesserte Mahlqualität liefert.The invention has for its object to a spiral jet mill Crushing powdery materials to provide wear resistant and moreover largely shockproof and is insensitive to thermal shock, reduced repair work requires and provides improved grinding quality.
Die Aufgabe wird dadurch gelöst, dass in das Stahl-Außengehäuse einer
Spiralstrahlmühle ein druckfestes und vollständig aus verschleißfestem Material
bestehendes Mahlgehäuse eingelagert ist.
Weitere vorteilhafte Ausführungsvarianten sind in den Unteransprüchen
beschrieben.The object is achieved in that a pressure-resistant grinding housing which is made entirely of wear-resistant material is embedded in the steel outer housing of a spiral jet mill.
Further advantageous design variants are described in the subclaims.
Gegenstand der Erfindung ist auch eine Spiralstrahlmühle mit einem Stahl-Außengehäuse,
in das ein druckfestes und vollständig aus verschleißfestem
Material bestehendes Mahlgehäuse eingelagert ist, die gegenüber den
bekannten technischen Lösungen u. a. folgende Vorteile aufweist:
deutlich längere Standzeiten, kürzere Reparaturzeiten, einfache Reinigung,
spannungsfreier Zusammenbau, Erzielung einer reproduzierbaren Mahlqualität
nach der Reparatur wegen der wiederherstellbaren Mühlengeometrie, Einsatz
unterschiedlicher verschleißfester Werkstoffe - auch in Kombination -
angepasst an die Erfordernisse des Mahlguts.The invention also relates to a spiral jet mill with a steel outer housing, in which a pressure-resistant and completely wear-resistant material grinding housing is incorporated, which has the following advantages over the known technical solutions:
significantly longer service life, shorter repair times, easy cleaning, stress-free assembly, achieving a reproducible grinding quality after the repair due to the recoverable mill geometry, use of different wear-resistant materials - also in combination - adapted to the requirements of the regrind.
Die erfindungsgemäße Strahlmühle ist aus einem Außengehäuse und einem in
dem Außengehäuse frei eingelagerten Mahlgehäuse aufgebaut. Sowohl das
Außengehäuse wie das Mahlgehäuse ist ein separates und - abgesehen von
den Zu- und Ableitungen - ein in sich geschlossenes Gehäuse. Die
Kennzeichnung "frei eingelagert" bedeutet, dass Mahlgehäuse und
Außengehäuse nicht fest miteinander verbunden sind.
Das Außengehäuse ist wie bekannt aus Stahl gefertigt. Das Mahlgehäuse
besteht dagegen vollständig aus verschleißfestem Werkstoff und zeichnet sich
durch eine besondere Konstruktion aus.The jet mill according to the invention is constructed from an outer housing and a grinding housing freely embedded in the outer housing. Both the outer housing and the grinding housing are separate and - apart from the supply and discharge lines - a self-contained housing. The marking "freely stored" means that the grinding housing and the outer housing are not firmly connected.
As is known, the outer housing is made of steel. The grinding housing, on the other hand, consists entirely of wear-resistant material and is characterized by a special construction.
In der DE 299 09 743 U1 wird betont, dass eine vollständig aus beispielsweise
Siliciumcarbid bestehende Mühle wegen ihrer Sprödigkeit nur eingeschränkt
einsetzbar ist. Bei den bekannten Spiralstrahlmühlen besteht deswegen das
Gehäuse selbst aus zwei Schichten: zum ersten aus einem Trägerwerkstoff, in
der Regel Stahl, und zum zweiten aus einer auf den Trägerwerkstoff innen
aufgebrachten Auskleidung aus verschleißfestem Material. Das
erfindungsgemäße Mahlgehäuse ist dagegen vollständig aus einem
verschleißfesten Werkstoff gefertigt. Infrage kommen beispielsweise Carbide
wie Wolframcarbid (z. B. WC-Co-Legierung bekannt als Widia®), Siliciumcarbid,
Borcarbid oder andere geeignete Carbide sowie Nitride, Boride oder andere
Keramiken oder Hartmetall. Weiterhin können die verschleißfesten Werkstoffe
auch in Kombination miteinander verwendet werden.
Diese Konstruktion ist nur möglich, weil das Mahlgehäuse selbsttragend, ohne
feste Verbindung und spannungsfrei in das Außengehäuse eingelagert ist.DE 299 09 743 U1 emphasizes that a mill consisting entirely of silicon carbide, for example, can only be used to a limited extent because of its brittleness. In the known spiral jet mills, therefore, the housing itself consists of two layers: the first of a carrier material, usually steel, and the second of a lining of wear-resistant material applied to the inside of the carrier material. The grinding housing according to the invention, however, is made entirely of a wear-resistant material. For example, carbides such as tungsten carbide (e.g. WC-Co alloy known as Widia®), silicon carbide, boron carbide or other suitable carbides as well as nitrides, borides or other ceramics or hard metal are suitable. Furthermore, the wear-resistant materials can also be used in combination with one another.
This construction is only possible because the grinder housing is self-supporting, without a fixed connection and stored tension-free in the outer housing.
Das Mahlgehäuse besteht aus wenigstens vier Teilen. Bei einer horizontal aufgestellten Mühle sind dies der Boden, die ringförmige Seitenwandung, der Deckel mit dem angeformten Produktaustragsstutzen und der Mahlguteintragsstutzen. Im Deckel befindet sich neben dem Produktaustragsstutzen die Öffnung für den Mahlguteintrag. Boden, Seitenwandung, Deckel und Mahlguteintragsstutzen berühren sich kraftschlüssig ohne besondere Dichtung. Das gesamte mehrteilige Mahlgehäuse liegt spannungsfrei innerhalb des Außengehäuses. Die Mühle kann auch entsprechend vertikal aufgestellt werden.The grinder housing consists of at least four parts. With one horizontal erected mill these are the bottom, the annular side wall, the Cover with the molded product discharge nozzle and the Feed nozzle. The lid is next to the Product discharge nozzle the opening for the regrind entry. Ground, Side wall, cover and grist inlet connection touch non-positive without a special seal. The entire multi-part The grinding housing is tension-free inside the outer housing. The mill can also be set up vertically.
Der Zwischenraum zwischen Außengehäuse und Mahlgehäuse-Seitenwandung dient als ringförmiger Hochdruck-Treibgaskanal. Das Treibgas wird über einen oder mehrere Stutzen zunächst in den ringförmigen Treibgaskanal zwischen Außen- und Innengehäuse und weiter über einfache Bohrungen im Ring des Mahlgehäuses (Mahlkammerwand) in das Innere des Mahlgehäuses, die Mahlkammer, geleitet. Es ist in keinem Fall erforderlich, die Bohrungen mit einem besonderen Verschleißschutz auszukleiden oder besondere Maßnahmen zur Abdichtung zu ergreifen, wie dies bei den bekannten Mühlen nötig ist, weil dort Düsen eingebaut sind. The space between the outer casing and the grinder casing side wall serves as an annular high pressure propellant gas duct. The propellant is over a or several nozzles first in the annular propellant gas channel between Outer and inner housing and further through simple holes in the ring of the Grinder housing (grinding chamber wall) in the interior of the grinder housing Grinding chamber, directed. It is never necessary to use the holes to line a special wear protection or special Sealing measures to be taken, as is the case with the known mills is necessary because there are nozzles installed.
Die Verbindung der Teile des Außengehäuses und des Mahlgehäuses zu einer druckfesten Mühle erfolgt über Schrauben oder Klammern am äußeren Umfang des Außengehäuses. Die Verschraubung bzw. die Verklammerung hat den Vorteil, dass die Mühle zu Reinigungs- oder Wartungsarbeiten sehr leicht und sehr schnell geöffnet und wieder verschlossen werden kann. Die Einzelteile des Mahlgehäuses werden einfach herausgehoben bzw. eingesetzt. Auf diese Weise ist auch der Treibgaskanal direkt zugänglich und kann problemlos gereinigt werden.The connection of the parts of the outer housing and the grinding housing into one The pressure-resistant grinder is made using screws or clips on the outer circumference of the outer case. The screw connection or the stapling has the Advantage that the grinder for cleaning or maintenance work very easily and can be opened and closed very quickly. The individual parts of the Grinder housings are simply lifted out or inserted. To this The propellant gas duct is also directly accessible and can be used without any problems getting cleaned.
Die Einzelteile des verschleißfesten Mahlgehäuses - Boden, Seitenwandung, Deckel - können auch weiter in Segmente unterteilt werden, wenn die einteilige Herstellung aus gesintertem Werkstoff wegen zu großen Formats der Teile Probleme bereitet. Die Segmente werden so aneinander gefügt, dass das Mahlgehäuse in sich dicht ist und spannungsfrei im Außengehäuse liegt.The individual parts of the wear-resistant grinding housing - bottom, side wall, Lid - can also be further divided into segments if the one-piece Manufactured from sintered material due to the large format of the parts Problems. The segments are joined together so that the Grinding housing is tight in itself and is tension-free in the outer housing.
Obwohl die Treibgaseinleitung in den Mahlraum bevorzugt über einfache
Bohrungen erfolgt, ist auch die Verwendung von Düsen, speziell Laval-Düsen
möglich. Die Düsen werden mit bekannten Techniken eingebaut; beispielsweise
können mit Hilfe von Speziallot Buchsen mit Gewindebohrungen eingesetzt
werden, die die Düsen aufnehmen.
Als Gas können hochgespannter Dampf, Luft oder andere Gase verwendet
werden. Der Druck (bis ca. 35 bar) und die Temperatur (bis ca. 350°C) sind auf
das jeweilige Mahlgut und die gewünschte Mahlfeinheit abzustimmen.Although the propellant gas is preferably introduced into the grinding chamber through simple bores, the use of nozzles, especially Laval nozzles, is also possible. The nozzles are installed using known techniques; For example, special plugs with threaded holes can be used to receive the nozzles.
High-tension steam, air or other gases can be used as the gas. The pressure (up to approx. 35 bar) and the temperature (up to approx. 350 ° C) have to be matched to the respective regrind and the desired fineness.
Wenn die Mühle bei erhöhten Temperaturen betrieben wird, entsteht beim Aufheizen am Boden und Deckel zwischen Außengehäuse und Mahlgehäuse ein Überdruck, der durch Entlüftungsbohrungen in Boden und Deckel des Außengehäuses abgeleitet wird.If the mill is operated at elevated temperatures, the Heating on the bottom and lid between the outer housing and the grinding housing an overpressure caused by ventilation holes in the bottom and lid of the Outer housing is derived.
Die Oberfläche des Mahlgehäuse-Innenraums kann beliebig gestaltet werden. Im allgemeinen Fall ist sie glatt. Unter bestimmten Mahlbedingungen ist es für die Mahlqualität vorteilhaft, die Oberfläche auf der Bodenplatte oder auf den anderen Innenraumoberflächen und in dem Mahlguteintragsstutzen strukturiert auszuführen, d. h. mit Riefen, Nuten, Wellen, Noppen oder dergleichen zu versehen. Beispielsweise hat es sich bei der Feinmahlung von Titandioxid-Pigmenten herausgestellt, dass durch eine derart strukturierte Mahlkammeroberfläche die optischen Eigenschaften des Pigments wie etwa der Glanz beeinflusst werden können.The surface of the grinder housing interior can be designed as desired. In the general case it is smooth. Under certain grinding conditions it is for the grinding quality advantageous, the surface on the base plate or on the other interior surfaces and structured in the grist inlet to execute, d. H. with grooves, grooves, waves, nubs or the like Mistake. For example, it has been used in the fine grinding of titanium dioxide pigments found that through such a structured Grinding chamber surface the optical properties of the pigment such as the gloss can be influenced.
Vorteilhaft wird die Spiralstrahlmühle eingesetzt zur Feinmahlung von Titandioxidpigment-Partikeln, wobei hochgespannter Dampf als Treibgas verwendet wird. Ungeachtet dessen ist die Mühle ebenso geeignet, andere Materialien fein zu mahlen wie Pigmente und Farbstoffe allgemein oder andere Materialien wie anorganische und Metall-Oxide, Toner, mineralische Füllstoffe (Carbonat, Kreide, Talk etc.), Waschmittel, Pharmazeutika, Nahrungsmittel, Kosmetika, Düngemittel, Herbizide, Pestizide, Insektizide, Fungizide, Klärschlamm etc.The spiral jet mill is advantageously used for fine grinding of titanium dioxide pigment particles, using high-tension steam as propellant becomes. Regardless, the grinder is equally suitable, other materials fine to grind like pigments and dyes in general or other materials like inorganic and metal oxides, toners, mineral fillers (carbonate, Chalk, talc etc.), detergents, pharmaceuticals, food, cosmetics, Fertilizers, herbicides, pesticides, insecticides, fungicides, sewage sludge etc.
Eine vorteilhafte Ausführung der Erfindung wird im folgenden anhand der Figuren 1 bis 3 beispielhaft beschrieben:
- Fig. 1:
- Draufsicht
- Fig. 2a/b:
- Seitenansicht entlang Schnitt AB
- Fig. 3a/b:
- Seitenansicht entlang Schnitt CD
- Fig. 1:
- Top view
- Fig. 2a / b:
- Side view along section AB
- Fig. 3a / b:
- Side view along section CD
Figur 1 zeigt in Draufsicht die erfindungsgemäße Spiralstrahlmühle mit Mahlguteintrag (1) und Injektorgaseintritt (3) in den Mahlraum (7) sowie den mittig angeordneten Produktaustrag (2). Die Treibgaszufuhr (4) erfolgt randlich durch das Außengehäuse (13, 14) in den Treibgaskanal (5). Die Seitenwandung des Mahlgehäuses, der Mahlgehäusering (8), ist mit Bohrungen (6) für die Treibgaseinleitung in den Mahlraum (7) versehen.Figure 1 shows a top view of the spiral jet mill according to the invention Grist feed (1) and injector gas inlet (3) into the grinding chamber (7) and the centrally located product discharge (2). The propellant gas supply (4) is marginal through the outer housing (13, 14) into the propellant gas duct (5). The Side wall of the grinder housing, the grinder housing ring (8) is with holes (6) for introducing propellant into the grinding chamber (7).
In Figur 2a wird der Schnitt AB zum besseren Verständnis als Explosionszeichnung dargestellt. Figur 2b zeigt das Detail X aus Figur 2a. Das äußere Stahlgehäuse ist ausgeführt als Schale (14) und Deckel (13) mit angeformtem Produktaustragsstutzen (18) und Mahlguteintrags/lnjektorgaseintrittsstutzen ((20), dargestellt in Figur 3a). Das darin liegende Mahlgehäuse, hergestellt aus verschleißfestem Material, besteht aus Boden (10), Ring (8) und Deckel (9) ebenfalls mit angeformtem Produktaustragsstutzen (9a) sowie aus dem Mahlguteintragsstutzen, der in Figur 3a/b dargestellt ist. Zwischen Außenschale (14) bzw. -deckel (13) und Mahlgehäusering (8) befindet sich der Treibgaskanal (5). Im Inneren des Mahlgehäuses befindet sich der Mahlraum (7). Nur während des Zusammenbaus wird der bruchempfindliche Mahlgehäusedeckel (9) am Produktaustragsstutzen (18) mit Fixierschrauben positioniert.In FIG. 2a the section AB is shown as Exploded view shown. Figure 2b shows the detail X from Figure 2a. The outer steel housing is designed as a shell (14) and cover (13) molded product discharge nozzle (18) and regrind / injector gas inlet nozzle ((20) shown in Figure 3a). The one in it Grinding housing, made of wear-resistant material, consists of floor (10), ring (8) and cover (9) also with molded Product discharge nozzle (9a) and from the regrind inlet nozzle, which in Figure 3a / b is shown. Between the outer shell (14) or cover (13) and Grinding housing ring (8) is the propellant gas duct (5). Inside the The grinding chamber (7) is located in the grinding housing. Only during the Assembling the break-sensitive grinding housing cover (9) on Product discharge nozzle (18) positioned with fixing screws.
Die Treibgaszuführung (4) in den Treibgaskanal (5) kann über eine oder mehrere Einleitungsstutzen erfolgen. Vorteilhafterweise erfolgt die Zuführung über mehrere Zuleitungen, um die erforderliche Gasmenge störungsfrei und ohne Druckverlust in den Treibgaskanal einleiten zu können.The propellant gas supply (4) in the propellant gas channel (5) can be via or several discharge nozzles are made. The feed is advantageously carried out over several supply lines to the required amount of gas without problems and without being able to discharge into the propellant gas duct.
Figur 1 zeigt, wie der Mahlgehäusering (8) gegenüber dem Mahlgehäuseboden ((10) in Figur 2a) mit Hilfe eines Fixierstifts (16), der in einer Aussparung von Mahlgehäusering (8) und Außengehäuseboden (14) lose eingesetzt ist, fixiert wird. Der Außengehäusedeckel (13) kann anschließend, ohne dass die Mühle geöffnet werden müsste, um bis zu 180° gegenüber dem Mahlkammerring (8) verdreht werden, so dass unterschiedliche geometrische Anordnungen von Mahlguteintrag zu Treibgaseindüsung in die Mahlkammer einstellbar sind.Figure 1 shows how the grinder housing ring (8) relative to the grinder housing base ((10) in Figure 2a) with the help of a fixing pin (16) which is in a recess of Grinder housing ring (8) and outer housing base (14) is loosely inserted, fixed becomes. The outer housing cover (13) can then without the mill would have to be opened by up to 180 ° in relation to the grinding chamber ring (8) are rotated so that different geometrical arrangements of Grist input for propellant gas injection into the grinding chamber can be set.
Die Anzahl der Bohrungen bzw. Düsen (6) hängt vom Mahlkammerdurchmesser ab. Beispielsweise kann man bei einem kleineren Durchmesser von z.B. 200 mm mit 4 Düsen und bei größeren Durchmessern von etwa 1000 mm mit 16 Düsen arbeiten. Es sind jedoch auch andere Kombinationen möglich. Der Anstellwinkel der Bohrungen (6) in der Mahlgehäuseringwandung (8) wird in Hinblick auf das zu mahlende Gut und die gewünschte Mahlqualität gewählt. Der Fachmann kennt die Zusammenhänge zwischen Düsen- bzw. Bohrungsanstellwinkel, Anzahl der Düsen, Treibgasdruck, Durchsatz usw. und Mahlfeinheit bei den verschiedenen Produkten. Aufgrund des modulartigen Aufbaus der Gesamtmühle und des Mahlgehäuses im besonderen können der Anstellwinkel wie die Anzahl der Bohrungen oder Düsen durch Austausch des Mahlgehäuserings bzw. einzelner Segmente leicht geändert werden.The number of holes or nozzles (6) depends on Grinding chamber diameter. For example, with a smaller one Diameter of e.g. 200 mm with 4 nozzles and for larger diameters of about 1000 mm with 16 nozzles. However, there are others Combinations possible. The angle of attack of the holes (6) in the Grinding housing ring wall (8) is in view of the material to be ground and the desired grinding quality selected. The expert knows the relationships between nozzle or bore angle, number of nozzles, LPG pressure, throughput etc. and fineness of the different Products. Due to the modular structure of the overall mill and the Grinder housing in particular, the angle of attack as the number of Bores or nozzles by exchanging the grinding housing ring or individual ones Segments can be easily changed.
Die Berührungsflächen der einzelnen Teile des Mahlgehäuses (8, 9, 10) untereinander sind selbstabdichtend geschliffen. Die Abdichtung zwischen Mahlgehäusering (8) und Außengehäuseschale (14) und Außengehäusedeckel (13) erfolgt mit Hilfe einer Dichtung (11), beispielsweise einer Graphitdichtung. Üblicherweise unterscheiden sich die Oberflächentoleranzen des Außengehäuses und des Mahlgehäuses um ein bis zwei Größenordnungen. Deswegen ist es vorteilhaft, jedoch nicht erforderlich, zwischen Mahlgehäuseboden (10) und Außengehäuseboden (14) bzw. zwischen Mahlgehäusedeckel (9) und Außengehäusedeckel (13) je eine Ausgleichsfolie (12) einzulegen, die eine kraftschlüssige Verbindung herstellt. Die gesamte Mühle wird über Schraubklammern (15) am äußeren Umfang zusammen gehalten. Auf diese Weise ist sowohl das Mahlgehäuse (8, 9, 10, 19) wie der Hochdruck-Treibgaskanal (5) druckfest abgedichtet. Weiterhin enthalten Außengehäuseschale (14) und Außengehäusedeckel (13) eine oder mehrere Entlüftungsbohrungen (17), die den Überdruck, der beim Aufheizen zwischen Außengehäuse und Mahlgehäuse entsteht, ableiten und so einen spannungsfreien Betrieb ermöglichen.The contact surfaces of the individual parts of the grinding housing (8, 9, 10) are self-sealing ground with each other. The seal between Grinder housing ring (8) and outer housing shell (14) and outer housing cover (13) is carried out with the aid of a seal (11), for example a graphite seal. Usually, the surface tolerances of the Outer housing and the grinding housing by one to two orders of magnitude. Therefore, it is advantageous, but not necessary, between Grinding case bottom (10) and outer case bottom (14) or between Grinder housing cover (9) and outer housing cover (13) each have a compensating film (12) insert, which creates a positive connection. The whole The grinder is assembled on the outer circumference using screw clamps (15) held. In this way, both the grinding housing (8, 9, 10, 19) as the High-pressure propellant gas duct (5) sealed pressure-tight. Furthermore contain outer shell (14) and outer cover (13) one or more vent holes (17), the overpressure that the Heating occurs between the outer housing and the grinding housing, dissipate and so enable voltage-free operation.
Figur 3a zeigt in Seitenansicht den Mahlguteintrag entlang Schnitt CD. Figur 3b zeigt das Detail Y aus Figur 3a. In der dargestellten Ausführung wird das zu mahlende Material (1) über einen Trichter zugeführt und mit Hilfe des Injektorgasstroms (3) schräg in den Mahlraum (7) eingeführt. Der verschleißfeste Mahlguteintragsstutzen (19) ist als lose in den Eintragsstutzen des Außengehäuses (20) eingesetzte Buchse ausgeführt, die nur während des Einbauvorgangs mit einer Fixierschraube positioniert wird. Figure 3a shows a side view of the regrind entry along section CD. Figure 3b shows the detail Y from Figure 3a. In the version shown, this becomes grinding material (1) fed via a funnel and using the Injector gas flow (3) introduced obliquely into the grinding chamber (7). The wear-resistant regrind inlet nozzle (19) is loose in the inlet nozzle of the outer housing (20) inserted socket executed only during the Installation process is positioned with a fixing screw.
Die erfindungsgemäße Strahlmühle ist thermoschockunempfindlich und weitestgehend druckstoßfest.The jet mill according to the invention is insensitive to thermal shock and largely pressure shock resistant.
Claims (13)
in das Außengehäuse das druckfeste und vollständig aus verschleißfestem Material bestehende Mahlgehäuse eingelagert ist.Grinding casing in a spiral jet mill with a steel outer casing characterized in that
the pressure-resistant grinding housing, which is made entirely of wear-resistant material, is embedded in the outer housing.
der verschleißfeste Werkstoff ein Werkstoff aus der Gruppe der Hartmetalle, Carbide, Boride oder Nitride oder eine andere Keramik istGrinding housing according to claim 1, characterized in that
the wear-resistant material is a material from the group of hard metals, carbides, borides or nitrides or another ceramic
es aus mindestens vier Teilen besteht.Grinding housing according to claim 1, characterized in that
it consists of at least four parts.
es aus nur einem verschleißfesten Werkstoff besteht.Grinding housing according to claim 3, characterized in that
it consists of only one wear-resistant material.
die Einzelteile des Mahlgehäuses jeweils aus unterschiedlichen verschleißfesten Werkstoffen bestehen.Grinding housing according to claim 3, characterized in that
The individual parts of the grinder housing each consist of different wear-resistant materials.
die Mahlraum-Oberflächen glatt und/oder strukturiert sind.Grinding housing according to one or more of claims 1 to 5, characterized in that
the grinding chamber surfaces are smooth and / or structured.
enthaltend ein Mahlgehäuse nach einem der vorhergehenden Ansprüche. Modular spiral jet mill
containing a grinding housing according to one of the preceding claims.
die Spiralstrahlmühle mit Luft oder einem anderen Gas oder hochgespanntem Wasserdampf betrieben wird.Spiral jet mill according to claim 7, characterized in that
the spiral jet mill is operated with air or another gas or high-tension steam.
der Boden und der Deckel des Außengehäuses Entlüftungsbohrungen aufweisen.Spiral jet mill according to claim 7 or 8, characterized in that
the bottom and the lid of the outer housing have ventilation holes.
zwischen Außengehäuse-Boden und Mahlgehäuse sowie zwischen Außengehäuse-Deckel und Mahlgehäuse jeweils eine Ausgleichsfolie eingelegt ist.Spiral jet mill according to one or more of claims 7 to 9, characterized in that
A compensating film is inserted between the outer housing base and the grinding housing and between the outer housing cover and the grinding housing.
zur Feinmahlung von Titandioxid-Pigmenten.Use of the spiral jet mill according to one or more of claims 7 to 10
for fine grinding of titanium dioxide pigments.
zur Feinmahlung von Pigmenten und Farbstoffen, anorganischen Oxiden, Metalloxiden, Tonern, mineralischen Füllstoffen wie Carbonat, Kreide, Talk und anderen, Waschmitteln, Nahrungsmitteln, Düngemitteln, Herbiziden, Pestiziden, Insektiziden, Fungiziden und Klärschlamm.Use of the spiral jet mill according to one or more of claims 7 to 10
for fine grinding of pigments and dyes, inorganic oxides, metal oxides, toners, mineral fillers such as carbonate, chalk, talc and others, detergents, foods, fertilizers, herbicides, pesticides, insecticides, fungicides and sewage sludge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10252441 | 2002-11-12 | ||
| DE10252441 | 2002-11-12 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1419823A2 true EP1419823A2 (en) | 2004-05-19 |
| EP1419823A3 EP1419823A3 (en) | 2006-01-11 |
| EP1419823B1 EP1419823B1 (en) | 2007-09-05 |
Family
ID=32115451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03025553A Revoked EP1419823B1 (en) | 2002-11-12 | 2003-11-08 | Spiral jet mill |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7150421B2 (en) |
| EP (1) | EP1419823B1 (en) |
| JP (1) | JP2004160456A (en) |
| AT (1) | ATE372171T1 (en) |
| DE (2) | DE10352039B4 (en) |
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| WO2008046727A2 (en) * | 2006-10-16 | 2008-04-24 | Evonik Degussa Gmbh | Amorphous submicron particles |
| CN101437621B (en) * | 2006-05-17 | 2014-06-11 | 罗兰·尼德 | Method for producing very fine particles by means of a jet mill |
| CN109078734A (en) * | 2018-08-07 | 2018-12-25 | 中国农业大学 | Short distance jet stream concurrent crosses the valve that clashes |
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| TWI376354B (en) * | 2003-12-03 | 2012-11-11 | Miike Tekkosho Kk | An apparatus for smashing organic substance particles |
| DE102006048865A1 (en) * | 2006-10-16 | 2008-04-17 | Roland Dr. Nied | Process for the production of finest particles and jet mill therefor and air classifier and operating method thereof |
| DE102006048864A1 (en) * | 2006-10-16 | 2008-04-17 | Roland Dr. Nied | Process for the production of finest particles and jet mill therefor and air classifier and operating method thereof |
| JP5154103B2 (en) * | 2007-03-08 | 2013-02-27 | キョーリンフード工業株式会社 | Jet mill and manufacturing method thereof |
| US7398934B1 (en) * | 2007-05-15 | 2008-07-15 | E.I. Du Pont De Nemours And Company | Deep-chamber, stepped, fluid-energy mill |
| JP5091889B2 (en) * | 2009-02-27 | 2012-12-05 | 三菱重工業株式会社 | Animal fixing device and animal fixing method |
| US20130101488A1 (en) * | 2011-10-19 | 2013-04-25 | General Electric Company | Optimized boron powder for neutron detection applications |
| US20210316232A1 (en) * | 2018-06-15 | 2021-10-14 | W.R. Grace & Co.-Conn. | Defoamer active, manufacturing thereof, and deforming formulation |
| JPWO2023067655A1 (en) * | 2021-10-18 | 2023-04-27 | ||
| EP4442368A1 (en) | 2023-04-05 | 2024-10-09 | Kronos International, Inc. | Spiral jet mill with multiple product injector nozzles and method of milling a granular product |
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- 2003-11-08 EP EP03025553A patent/EP1419823B1/en not_active Revoked
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| US2735421A (en) * | 1951-10-22 | 1956-02-21 | Shaping of bodies of crystalline carbon | |
| DE2743935A1 (en) * | 1976-10-01 | 1978-04-06 | Edwin Fisler Fay | DEVICE FOR PULVERIZING SOLID MATERIAL INTO A FINELY DIVIDED FORM |
| DE29909743U1 (en) * | 1999-06-04 | 1999-10-21 | Aaslepp, Helmut, 45133 Essen | Spiral jet mill in modular design, with a ventilation floor + a regrind feed plate |
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| CN101437621B (en) * | 2006-05-17 | 2014-06-11 | 罗兰·尼德 | Method for producing very fine particles by means of a jet mill |
| WO2008046727A2 (en) * | 2006-10-16 | 2008-04-24 | Evonik Degussa Gmbh | Amorphous submicron particles |
| WO2008046727A3 (en) * | 2006-10-16 | 2008-07-17 | Evonik Degussa Gmbh | Amorphous submicron particles |
| US7850102B2 (en) | 2006-10-16 | 2010-12-14 | Evonik Degussa Gmbh | Amorphous submicron particles |
| US8039105B2 (en) | 2006-10-16 | 2011-10-18 | Evonik Degussa Gmbh | Amorphous submicron particles |
| CN101616743B (en) * | 2006-10-16 | 2014-03-05 | 赢创德固赛有限责任公司 | Amorphous submicron particles |
| TWI446970B (en) * | 2006-10-16 | 2014-08-01 | Evonik Degussa Gmbh | Amorphous submicron particles |
| CN109078734A (en) * | 2018-08-07 | 2018-12-25 | 中国农业大学 | Short distance jet stream concurrent crosses the valve that clashes |
| CN109078734B (en) * | 2018-08-07 | 2020-03-13 | 中国农业大学 | Short-distance jet flow common-point intersection clash valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10352039A1 (en) | 2004-05-27 |
| US20040200913A1 (en) | 2004-10-14 |
| EP1419823A3 (en) | 2006-01-11 |
| US7150421B2 (en) | 2006-12-19 |
| EP1419823B1 (en) | 2007-09-05 |
| DE10352039B4 (en) | 2006-03-30 |
| DE50308103D1 (en) | 2007-10-18 |
| JP2004160456A (en) | 2004-06-10 |
| ATE372171T1 (en) | 2007-09-15 |
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