EP1043060B1 - Compact installation for wet classifying of powdery substances - Google Patents
Compact installation for wet classifying of powdery substances Download PDFInfo
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- EP1043060B1 EP1043060B1 EP00106281A EP00106281A EP1043060B1 EP 1043060 B1 EP1043060 B1 EP 1043060B1 EP 00106281 A EP00106281 A EP 00106281A EP 00106281 A EP00106281 A EP 00106281A EP 1043060 B1 EP1043060 B1 EP 1043060B1
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- Prior art keywords
- dispersing
- unit
- suspension
- classified
- classifying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/59—Mixing systems, i.e. flow charts or diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
Definitions
- the present invention relates to a system for wet classification of powdery substances with the Features of the preamble of claim 1.
- the solid (powder) becomes a liquid (usually water) mixed in a premix tank, to get a suspension.
- the suspension will, if required in a subsequent dilution tank diluted and then into the centrifuge Wet classifier introduced.
- Inside the rotating one Centrifugal drums become the heavier and coarser ones Particles faster than the lighter and finer ones Suspension guided radially outwards against the drum wall, where they settle as sediment.
- the sediment is in Cleaning phases of the wet classifier from the drum wall solved, depending on the embodiment, Cleaning fluids, mechanical cleaning equipment, such as knives, etc.
- the classified suspension is used during the classification process continuously withdrawn from the wet classifier and passed on for further use.
- Such a wet classification system therefore requires a premix tank (Dispersing unit) for producing the to be classified Suspension, the actual classification unit (Centrifuge) and a storage container to hold the classified suspension, these parts over corresponding Inlets and outlets are interconnected.
- a premix tank Disposing unit
- the actual classification unit Chiptrifuge
- a storage container to hold the classified suspension
- From US-A-3 852 191 is a wet classifier of powdery substances with the characteristics of the generic term of claim 1 known.
- the neck container takes a mixture from this known system Dispersing liquid and powdery substances, which is fed to a dispersing unit.
- the in the Dispersion produced dispersion is a filter fed.
- the filtrate produced by filtration arrives via a pump into a storage tank and stands there available as a suspension for further use.
- the from Coarse particles coming into the filter are returned to the batch container.
- this known system therefore form the Dispersing unit and the classifying unit (filter unit) separate units.
- the present invention has for its object a To create a system for wet classification of the specified type, which is characterized by a particularly compact structure.
- the system designed according to the invention is characterized by this from that it is particularly compact, i.e. includes very few parts. This is because the Classifying unit (centrifuge) at the same time as a dispersing unit is used. A separate dispersion unit (Premixing container) as in the prior art is eliminated Consequently. A batch container serves both to hold the Liquid for dispersing as well as for absorbing the suspension to be classified, prepared by dispersion. The classified suspension is from the dispersant Classifying unit in a storage container for further Use led.
- the system works in such a way that initially with the loading unit the substance containing solid particles, especially powdery substance, and from the batch container the dispersing liquid into the dispersing and Classification unit will be introduced.
- the dispersing device In this dispersion phase the dispersing device is in operation.
- the classification phase takes place, in which the Centrifugal drum is running with the increased classification speed.
- the coarse fraction or coarse glomerate collects here in the solids traps of the centrifugal drum, and the finished, i.e. Classified suspension leaves the drum ready for use and is in the storage container for that classified suspension introduced and stored there.
- the dispersing and classifying unit In the subsequent cleaning phase of the dispersing and classifying unit, which begins, for example, when 50% by volume of the Solid trapping spaces are filled with coarse glomerates a redispersion, according to which the sediment from the Catch spaces dissolved and redispersed in liquid is usually added as a cleaning liquid becomes.
- the sediment is preferably loosened about the intended dispersing device, which in the Cleaning phase as a mechanical detachment device for the Sediment cake, for example in the form of Dispersing knives, works.
- This cleaning phase worked long until the solids traps were cleaned are and the dispersing knife near the drum wall stand.
- the dissolved sediment (redispersed suspension) leaves the dispersing and classifying unit as pumpable suspension and can according to the corresponding Processing (grinding the coarse fraction) back into the system be introduced.
- the feed and discharge system preferably allows between Batch container and dispersing and classifying unit one Management of the dispersing liquid and the to be classified Suspension in circulation.
- This embodiment enables that in the dispersion phase during the loading of the dispersing and classification device with the powdered Substance the dispersing liquid between the batch container and dispersing and classifying unit in a circuit is and also after the loading of the powdered Substance over a period of time is carried out.
- a desired suspension slurry
- Suitable pumping devices are for circulation intended.
- the system expediently one in the discharge system for the classified Suspension turned on. Monitoring filter on.
- the one working as a centrifugal pump during classification Dispersing and classifying unit promotes the classified suspension under pressure through the monitoring filter, the classified and filtered suspension stored in the storage tank becomes.
- the stored suspension is stored in the storage tank itself expediently with the aid of a stirring device kept moving.
- the sediment cake is in the cleaning phase (separated coarse fraction) from the solids traps solved and by cleaning liquid supply converted back into a pumpable suspension, which in a suitable storage tank is collected.
- the attachment preferably has a grinding unit for the separated Coarse fraction into which the redispersed sediment is introduced becomes.
- the grinding unit can be used as a separate grinding unit or as integrated in the dispersing and classifying unit Be ground milling unit. It can be, for example to be a ball mill. In it the separated coarse fraction to the desired fineness ground. The fine suspension produced in this way can again Batch container fed and again at the next new batch be used.
- the feed unit expediently has a means Big bag operated by a hoist.
- This big bag takes the pulverulent material to be classified. He will when loading into the emptying position using a hoist brought, deposited and connected to a dosing device. The dosing device is then started, so that the big bag is emptied fully automatically and the powdery substance, for example fine powder Titanium dioxide, continuously fed to the process.
- the powdery substance for example fine powder Titanium dioxide
- the system has a test unit for the quality of the to be classified and / or classified suspension.
- This has the advantage of being direct it can be checked within the plant whether the suspension has the appropriate quality. To do this no laborious laboratory measurements are carried out. So can, for example, with the help of the test unit, as long as the suspension produced by dispersion or else the classified suspension is circulated, randomly be examined whether the suspensions correspond to the corresponding Possess quality grade. For example, at A coarse filter test can be performed while dispersing a fine filter test for the classified suspension can be carried out.
- system can also be an intermediate container for storing the classified suspension in front of the storage tank exhibit.
- the system according to the invention designed so that both dispersed and classified can be.
- the one in the dispersing and classifying unit provided dispersing device is preferably so trained that at the same time as a mechanical cleaning device be used in the cleaning phase can.
- this does not preclude both devices be separated from each other and for example in the respective Phase entered the unit and after completion during this phase can be moved out of the unit can.
- the invention does not exclude that the one described here System used exclusively for classifying is, a corresponding to already in the batch container classifying suspension is present or is generated there.
- the dispersing and classifying unit works as a pure classifying centrifuge, and the dispersing device works as a purely mechanical cleaning device.
- the purpose of the system is, however, the dispersing process and the classification process in a single compact Unit to perform the number of components required to reduce and a particularly compact design of unity.
- additional facilities within the common Housing be housed, for example the Storage tank for the suspension containing the coarse fraction, the drive for the dispersing and classifying unit, the Dosing device etc.
- the system has a housing 3, which is used to hold the most components of the system. Furthermore, the plant a batch container 25 and a storage container 31 as well as corresponding pipelines, pumps, valves, instruments etc., with most of these components also is housed in the housing 3.
- a combined dispersing and Classifying unit 12 which is a stationary outer housing as well a centrifugal drum arranged vertically in the outer housing 11 has.
- the centrifugal drum is powered by a motor and a vertical shaft driven. From above it protrudes into the Centrifugal drum 11 into a combined dispersing and Cleaning device 8 in and out of the drum it can be moved out again.
- a feed unit For loading the dispersing and classifying unit 12 with A powder unit to be classified is a feed unit provided that a big bag 2 and a Dosing device 4 comprises.
- the Big-Bag 2 can with the help a hoist 1 in the corresponding emptying position brought, dropped off and connected there.
- the emptying Big-Bags 2 can be connected after connecting the dosing device 4 take place fully automatically, whereby in the present Example of finely powdered titanium dioxide continuously is entered into the dispersing and classifying unit 12.
- a batch container 25 there is water, which means a pump 27 via a pipe 35 in the Dispersing and classifying unit 12 is pumped. That in the Pipe 35 arranged valve 26 is open.
- the dispersing device 8 within the centrifugal drum 11 in rotation, the Knives protrude into the chambers. Furthermore, the rotates Centrifugal drum 11.
- Via a line 36 is in the Dispersing and classifying unit 12 formed suspension withdrawn from the unit and back into the batch container 25 introduced.
- the big bag 2 becomes continuous emptied and into the circulated liquid (water) dispersed.
- the stirrer 37 rotates in the batch container 25 doing so at a certain speed.
- the centrifugal drum 11 works with a reduced one during the dispersing Rotational speed.
- the valve 19 is closed here, and the overflow peeling device 6 explained later pivoted out of the drum work space while the Dispersing device 8 is pivoted.
- the valve 17 is opened.
- the drive device for the stirrer 37 is at 24 designated.
- a valve connected in parallel to valve 26 bears the designation 29, while one parallel to the pump 27 switched pump carries the designation 28.
- the Centrifugal drum 11 to the preselected classification speed set. When this speed is reached, the pivots Overflow peeling device 6 in the drum work space.
- the valve 19 for the classified suspension opens.
- the Valve 16 the function of which will be explained later, remains closed while the valve 17 is also open.
- the one to be classified in the batch container 25 Suspension is pumped 28 through the pipeline 35 with the valve 29 open the dispersing and Classifying unit 12 supplied.
- the classification process is now running fully automatic until the preselected classification time has expired.
- a storage tank 13 in the housing 3 for the suspension containing the bulk and a ball mill 15.
- the valve 19 is closed.
- the valve 17 also closes and the valve 16 is opened.
- the dispersing device 8, the mechanical Cleaning device is used in the centrifugal drum retracted. It becomes cleaning fluid continuously added. Work continues until the Solids traps are cleaned and the knife of the disperser 8 stand near the drum wall. The dissolved sediment leaves the dispersing and Classification unit 12 as a pumpable suspension and is in Storage container 13 collected.
- the drum 11 is brought to a standstill, so that the residual liquid can also leave the system. Then a set amount of liquid is used Clean with swiveled-in dispersing knives and rotating Drum through the dispersing and classifying unit in drove the batch container 25.
- the valve is 17th opened while the valve 16 is closed.
- the redispersed sediment collected in the storage container 13 with the help of a pump 14 the mill 15 (Ball mill) fed. It will be in the centrifugal drum separated coarse fraction to the desired fineness ground. The fine suspension produced in this way becomes the batch container 25 fed and used again in the next new batch.
- test unit 10 In the housing 3 there is also a test unit 10 with which can be checked on site whether it is dispersing and / or the corresponding quality level when classifying is reached. It is so long when dispersing in Circuit until the coarse filter test of the test unit passed. Classification can then begin become. If the fine filter test of the test unit passed can with the deduction of the classified suspension be started.
- the system designed according to the invention thus adjusts Maximum compactness, flexibility and control options (without wasting time, without container contamination) for Available.
- the system can be operated fully automatically, and the personnel expenditure is low.
- a major advantage is that in particular in the case of finely powdered products by dispersing them generated vacuum with sucked in and dispersed is so that there is only a small environmental impact.
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Abstract
Description
Die vorliegende Erfindung betrifft eine Anlage zum Naßklassieren von pulverförmigen Substanzen mit den Merkmalen des Oberbegriffs von Patentanspruch 1.The present invention relates to a system for wet classification of powdery substances with the Features of the preamble of claim 1.
Naßklassiereinrichtungen in der Form einer Zentrifuge mit einem stationären Außengehäuse, einer im Außengehäuse angeordneten Schleudertrommel, einer Welle zum Rotierenlassen der Schleudertrommel, einer Reinigungsvorrichtung und entsprechenden Zu- und Abführeinrichtungen sind bekannt. Sie finden beispielsweise zur Abtrennung des Grobanteils von Pulvern, wie Titandioxid, Verwendung. Heutzutage finden immer mehr ultrafeine Materialien mit einer Partikelgröße zwischen 0,1-5 µm Verwendung. Derartige Partikelgrößen können zwar durch Feinmahlen von Rohsubstanzen erzielt werden, jedoch ist dies mit relativ hohen Betriebskosten verbunden, da hierzu sehr viel Energie verbraucht wird und Kühlsysteme benötigt werden. Darüber hinaus ist eine relativ starke Kontamination der Substanz vorhanden, und es wird ein großer Anteil von Partikeln mit Untergröße erzeugt. Solche Probleme treten bei Klassierzentrifugen nicht auf. Hierbei wird der Feststoff (Pulver) mit einer Flüssigkeit (üblicherweise Wasser) in einem Vormischtank vermischt, um eine Suspension zu erhalten. Die Suspension wird, falls erforderlich, in einem nachfolgenden Verdünnungstank verdünnt und dann in die als Zentrifuge ausgebildete Naßklassiereinrichtung eingeführt. Innerhalb der rotierenden Schleudertrommel werden die schwereren und gröberen Partikel schneller als die leichteren und feineren der Suspension radial nach außen gegen die Trommelwand geführt, wo sie sich als Sediment absetzen. Das Sediment wird in Reinigungsphasen der Naßklassiereinrichtung von der Trommelwand gelöst, wobei hierzu, je nach Ausführungsform, Reinigungsflüssigkeiten, mechanische Reinigungseinrichtungen, wie Messer etc., eingesetzt werden. Das in der Reinigungsflüssigkeit redispergierte Sediment wird schließlich aus der Schleudertrommel abgeführt und beispielsweise einer getrennt angeordneten Kugelmühle zugeführt, in der der Grobanteil der redispergierten Suspension gemahlen wird. Die aufbereitete Suspension kann dann erneut in das System eingeführt werden, beispielsweise dem Vormischtank zugeführt werden.Wet classifiers in the form of a centrifuge a stationary outer housing, one arranged in the outer housing Centrifugal drum, a shaft for rotating the centrifugal drum, a cleaning device and corresponding Feed and discharge devices are known. she find, for example, to remove the bulk of Powders such as titanium dioxide. Nowadays always find more ultra fine materials with a particle size between 0.1-5 µm use. Such particle sizes can can be achieved by fine grinding raw materials, however, this is associated with relatively high operating costs, because it uses a lot of energy and cooling systems are needed. It is also a relatively strong one Contamination of the substance is present and it becomes a large proportion of undersized particles produced. Such Problems do not arise with classifying centrifuges. in this connection the solid (powder) becomes a liquid (usually water) mixed in a premix tank, to get a suspension. The suspension will, if required in a subsequent dilution tank diluted and then into the centrifuge Wet classifier introduced. Inside the rotating one Centrifugal drums become the heavier and coarser ones Particles faster than the lighter and finer ones Suspension guided radially outwards against the drum wall, where they settle as sediment. The sediment is in Cleaning phases of the wet classifier from the drum wall solved, depending on the embodiment, Cleaning fluids, mechanical cleaning equipment, such as knives, etc. That in the Cleaning liquid will eventually redispersed sediment removed from the centrifugal drum and for example fed to a separately arranged ball mill, in the the majority of the redispersed suspension is ground becomes. The prepared suspension can then again in the System are introduced, for example the premix tank are fed.
Die klassierte Suspension wird während dem Klassiervorgang kontinuierlich von der Naßklassiereinrichtung abgezogen und der weiteren Verwendung zugeführt.The classified suspension is used during the classification process continuously withdrawn from the wet classifier and passed on for further use.
Eine solche Naßklassieranlage benötigt somit einen Vormischtank (Dispergiereinheit) zum Herstellen der zu klassierenden Suspension, die eigentliche Klassiereinheit (Zentrifuge) und einen Speicherbehälter zur Aufnahme der klassierten Suspension, wobei diese Teile über entsprechende Zu- und Ableitungen miteinander verbunden sind. Such a wet classification system therefore requires a premix tank (Dispersing unit) for producing the to be classified Suspension, the actual classification unit (Centrifuge) and a storage container to hold the classified suspension, these parts over corresponding Inlets and outlets are interconnected.
Aus der US-A-3 852 191 ist eine Anlage zum Naßklassieren von pulverförmigen Substanzen mit den Merkmalen des Oberbegriffes des Patentanspruches 1 bekannt. Der Ansatzbehälter nimmt bei dieser bekannten Anlage ein Gemisch aus Dispergierflüssigkeit und pulverförmigen Substanzen auf, das einer Dispergiereinheit zugeführt wird. Die in der Dispergiereinheit hergestellte Dispersion wird einem Filter zugeführt. Das durch Filtrieren erzeugte Filtrat gelangt über eine Pumpe in einen Speicherbehälter und steht dort als Suspension zur Weiterverwendung zur Verfügung. Der vom Filter kommende Grobanteil wird in den Ansatzbehälter zurückgeführt. Bei dieser bekannten Anlage bilden daher die Dispergiereinheit und die Klassiereinheit (Filtereinheit) getrennte Einheiten.From US-A-3 852 191 is a wet classifier of powdery substances with the characteristics of the generic term of claim 1 known. The neck container takes a mixture from this known system Dispersing liquid and powdery substances, which is fed to a dispersing unit. The in the Dispersion produced dispersion is a filter fed. The filtrate produced by filtration arrives via a pump into a storage tank and stands there available as a suspension for further use. The from Coarse particles coming into the filter are returned to the batch container. In this known system therefore form the Dispersing unit and the classifying unit (filter unit) separate units.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Anlage zum Naßklassieren der angegebenen Art zu schaffen, die sich durch einen besonders kompakten Aufbau auszeichnet.The present invention has for its object a To create a system for wet classification of the specified type, which is characterized by a particularly compact structure.
Diese Aufgabe wird erfindungsgemäß bei einer Anlage zum Naßklassieren von pulverförmigen Substanzen der angegebenen Art durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst. This object is achieved in a system for Wet classification of powdered substances of the specified Kind by the characterizing features of the claim 1 solved.
Die erfindungsgemäß ausgebildete Anlage zeichnet sich dadurch aus, daß sie besonders kompakt ausgebildet ist, d.h. besonders wenig Teile umfaßt. Dies beruht darauf, daß die Klassiereinheit (Zentrifuge) gleichzeitig als Dispergiereinheit verwendet wird. Eine getrennte Dispergiereinheit (Vormischbehälter) wie beim Stand der Technik entfällt somit. Ein Ansatzbehälter dient sowohl zur Aufnahme der Flüssigkeit zum Dispergieren als auch zur Aufnahme der durch Dispergieren hergestellten, zu klassierenden Suspension. Die klassierte Suspension wird von der Dispergierund Klassiereinheit in einen Speicherbehälter zur weiteren Verwendung geführt.The system designed according to the invention is characterized by this from that it is particularly compact, i.e. includes very few parts. This is because the Classifying unit (centrifuge) at the same time as a dispersing unit is used. A separate dispersion unit (Premixing container) as in the prior art is eliminated Consequently. A batch container serves both to hold the Liquid for dispersing as well as for absorbing the suspension to be classified, prepared by dispersion. The classified suspension is from the dispersant Classifying unit in a storage container for further Use led.
Die Anlage funktioniert derart, daß anfangs mit der Beschickungseinheit die Feststoffpartikel aufweisende Substanz, insbesondere pulverförmige Substanz, und aus dem Ansatzbehälter die Dispergierflüssigkeit in die Dispergierund Klassiereinheit eingeführt werden. In dieser Dispergierphase befindet sich die Dispergiervorrichtung in Tätigkeit. Nach Beendigung der Dispergierphase, während der die Schleudertrommel im allgemeinen mit einer relativ niedrigen Drehzahl läuft, erfolgt die Klassierphase, bei der die Schleudertrommel mit der erhöhten Klassierdrehzahl läuft. Hierbei sammelt sich der Grobanteil bzw. das Grobagglomerat in den Feststoff-Fangräumen der Schleudertrommel, und die fertige, d.h. klassierte Suspension verläßt die Trommel gebrauchsfertig und wird in den Speicherbehälter für die klassierte Suspension eingeführt und dort gespeichert. In der nachfolgenden Reinigungsphase der Dispergier- und Klassiereinheit, die beispielsweise beginnt, wenn 50 Vol.-% der Feststoff-Fangräume mit Grobagglomeraten gefüllt sind, erfolgt eine Redispergierung, gemäß der das Sediment aus den Fangräumen gelöst und wieder in Flüssigkeit dispergiert wird, die als Reinigungsflüssigkeit normalerweise zugegeben wird. Das Lösen des Sedimentes erfolgt dabei vorzugsweise über die vorgesehene Dispergiervorrichtung, die in der Reinigungsphase als mechanische Ablösevorrichtung für den Sedimentkuchen, beispielsweise in der Form von Dispergiermessern, wirkt. In dieser Reinigungsphase wird so lange gearbeitet, bis die Feststoff-Fangräume gereinigt sind und die Dispergiermesser in der Nähe der Trommelwandung stehen. Das aufgelöste Sediment (redispergierte Suspension) verläßt die Dispergier- und Klassiereinheit als pumpfähige Suspension und kann nach entsprechender Aufbereitung (Mahlen des Grobanteils) wieder in das System eingeführt werden.The system works in such a way that initially with the loading unit the substance containing solid particles, especially powdery substance, and from the batch container the dispersing liquid into the dispersing and Classification unit will be introduced. In this dispersion phase the dispersing device is in operation. After the dispersion phase, during which the Centrifugal drum generally with a relatively low Speed runs, the classification phase takes place, in which the Centrifugal drum is running with the increased classification speed. The coarse fraction or coarse glomerate collects here in the solids traps of the centrifugal drum, and the finished, i.e. Classified suspension leaves the drum ready for use and is in the storage container for that classified suspension introduced and stored there. In the subsequent cleaning phase of the dispersing and classifying unit, which begins, for example, when 50% by volume of the Solid trapping spaces are filled with coarse glomerates a redispersion, according to which the sediment from the Catch spaces dissolved and redispersed in liquid is usually added as a cleaning liquid becomes. The sediment is preferably loosened about the intended dispersing device, which in the Cleaning phase as a mechanical detachment device for the Sediment cake, for example in the form of Dispersing knives, works. In this cleaning phase worked long until the solids traps were cleaned are and the dispersing knife near the drum wall stand. The dissolved sediment (redispersed suspension) leaves the dispersing and classifying unit as pumpable suspension and can according to the corresponding Processing (grinding the coarse fraction) back into the system be introduced.
Vorzugsweise ermöglicht das Zu- und Abführsystem zwischen Ansatzbehälter und Dispergier- und Klassiereinheit eine Führung der Dispergierflüssigkeit und der zu klassierenden Suspension im Kreislauf. Diese Ausführungsform ermöglicht, daß in der Dispergierphase während der Beschickung der Dispergier- und Klassiereinrichtung mit der pulverförmigen Substanz die Dispergierflüssigkeit zwischen Ansatzbehälter und Dispergier- und Klassiereinheit im Kreislauf geführt wird und auch nach Beendigung der Beschickung mit der pulverförmigen Substanz über einen gewissen Zeitraum eine Umwälzung durchgeführt wird. Nach Beendigung der Dispergierphase, wenn eine gewünschte Suspension (Slurry) vorliegt, kann ebenfalls die zu klassierende Suspension zwischen Ansatzbehälter und Dispergier- und Klassiereinheit im Kreislauf gefahren werden. Zur Umwälzung sind geeignete Pumpeinrichtungen vorgesehen.The feed and discharge system preferably allows between Batch container and dispersing and classifying unit one Management of the dispersing liquid and the to be classified Suspension in circulation. This embodiment enables that in the dispersion phase during the loading of the dispersing and classification device with the powdered Substance the dispersing liquid between the batch container and dispersing and classifying unit in a circuit is and also after the loading of the powdered Substance over a period of time is carried out. After the dispersing phase, if a desired suspension (slurry) is present, can also be the suspension to be classified between batch container and dispersing and classifying unit in the circuit be driven. Suitable pumping devices are for circulation intended.
Um feststellen zu können, ob die klassierte Suspension den gewünschten Klassierungsgrad erreicht hat, weist die Anlage zweckmäßigerweise einen in das Abführsystem für die klassierte Suspension eingeschalteten. Überwachungsfilter auf. Die während des Klassierens als Zentrifugalpumpe arbeitende Dispergier- und Klassiereinheit fördert die klassierte Suspension unter Druck durch den Überwachungsfilter, wobei die klassierte und gefilterte Suspension im Speichertank gelagert wird. Im Speichertank selbst wird die gelagerte Suspension zweckmäßigerweise mit Hilfe einer Rührvorrichtung in Bewegung gehalten.In order to be able to determine whether the classified suspension meets the has reached the desired level of classification, the system expediently one in the discharge system for the classified Suspension turned on. Monitoring filter on. The one working as a centrifugal pump during classification Dispersing and classifying unit promotes the classified suspension under pressure through the monitoring filter, the classified and filtered suspension stored in the storage tank becomes. The stored suspension is stored in the storage tank itself expediently with the aid of a stirring device kept moving.
Wie bereits erwähnt, wird in der Reinigungsphase der Sedimentkuchen (abgetrennte Grobanteil) aus den Feststoff-Fangräumen gelöst und durch Reinigungsflüssigkeitszufuhr wieder in eine pumpfähige Suspension überführt, die in einem geeigneten Speichertank aufgefangen wird. Die Anlage weist vorzugsweise eine Mahleinheit für den abgetrennten Grobanteil auf, in die das redispergierte Sediment eingeführt wird. Die Mahleinheit kann als separate Mahleinheit oder als in die Dispergier- und Klassiereinheit integrierte Mahleinheit ausgebildet sein. Es kann sich hierbei beispielsweise um eine Kugelmühle handeln. In ihr wird der abgetrennte Grobanteil auf die gewünschte Feinheit gemahlen. Die so erzeugte Feinsuspension kann wieder dem Ansatzbehälter zugeführt und beim nächsten Neuansatz wieder verwendet werden.As already mentioned, the sediment cake is in the cleaning phase (separated coarse fraction) from the solids traps solved and by cleaning liquid supply converted back into a pumpable suspension, which in a suitable storage tank is collected. The attachment preferably has a grinding unit for the separated Coarse fraction into which the redispersed sediment is introduced becomes. The grinding unit can be used as a separate grinding unit or as integrated in the dispersing and classifying unit Be ground milling unit. It can be, for example to be a ball mill. In it the separated coarse fraction to the desired fineness ground. The fine suspension produced in this way can again Batch container fed and again at the next new batch be used.
Die Beschickungseinheit weist zweckmäßigerweise einen mittels Hebezeug bedienbaren Big-Bag auf. Dieser Big-Bag nimmt das zu klassierende pulverförmige Material auf. Er wird beim Beschicken mittels Hebezeug in die Entleerungsposition gebracht, abgesetzt und an eine Dosiervorrichtung angeschlossen. Die Dosiervorrichtung wird dann gestartet, so daß die Entleerung des Big-Bags vollautomatisch erfolgt und die pulverförmige Substanz, beispielsweise feinpulvriges Titandioxid, kontinuierlich dem Prozeß zugeführt wird.The feed unit expediently has a means Big bag operated by a hoist. This big bag takes the pulverulent material to be classified. He will when loading into the emptying position using a hoist brought, deposited and connected to a dosing device. The dosing device is then started, so that the big bag is emptied fully automatically and the powdery substance, for example fine powder Titanium dioxide, continuously fed to the process.
In Weiterbildung der Erfindung weist die Anlage eine Prüfeinheit für die Qualität der zu klassierenden und/oder klassierten Suspension auf. Dies hat den Vorteil, daß direkt innerhalb der Anlage geprüft werden kann, ob die Suspension die entsprechende Qualität besitzt. Hierzu müssen keine umständlichen Labormessungen durchgeführt werden. So kann beispielsweise mit Hilfe der Prüfeinheit, so lange die durch Dispergieren erzeugte Suspension oder aber auch die klassierte Suspension im Kreislauf gefahren wird, stichprobenhaft untersucht werden, ob die Suspensionen den entsprechenden Qualitätsgrad besitzen. Beispielsweise kann beim Dispergieren ein Grobfiltertest durchgeführt werden, während in bezug auf die klassierte Suspension ein Feinfiltertest durchgeführt werden kann.In a development of the invention, the system has a test unit for the quality of the to be classified and / or classified suspension. This has the advantage of being direct it can be checked within the plant whether the suspension has the appropriate quality. To do this no laborious laboratory measurements are carried out. So can, for example, with the help of the test unit, as long as the suspension produced by dispersion or else the classified suspension is circulated, randomly be examined whether the suspensions correspond to the corresponding Possess quality grade. For example, at A coarse filter test can be performed while dispersing a fine filter test for the classified suspension can be carried out.
In manchen Fällen kann die Anlage auch einen Zwischenbehälter zur Lagerung der klassierten Suspension vor dem Speicherbehälter aufweisen.In some cases, the system can also be an intermediate container for storing the classified suspension in front of the storage tank exhibit.
Besondere Vorteile in bezug auf eine kompakte Ausbildung werden mit einer Anlage erreicht, bei der die Dispergierund Klassiereinheit, die Beschickungseinheit, die Mahleinheit, der Überwachungsfilter und die Prüfeinheit in einem gemeinsamen Gehäuse untergebracht sind. Es wird auf diese Weise eine kompakte Einheit mit integrierten Bestandteilen erreicht, wobei zusätzlich lediglich noch der Ansatzbehälter und der Speicherbehälter - abgesehen von den üblichen Rohrleitungen, Pumpeinrichtungen, Ventilen, Instrumenten etc. - vorgesehen sein müssen. Die Anlage ist sehr gut für eine automatische Überwachung geeignet.Special advantages in relation to compact training are achieved with a system in which the dispersing and Classifying unit, the loading unit, the grinding unit, the monitoring filter and the test unit in one common housing are housed. It's going on this Way a compact unit with integrated components reached, with only the batch container and the storage tank - apart from the usual Pipelines, pumping devices, valves, instruments etc. - must be provided. The facility is very good for automatic monitoring is suitable.
Wie vorstehend beschrieben, ist die erfindungsgemäße Anlage so ausgelegt, daß hiermit sowohl dispergiert als auch klassiert werden kann. Die in der Dispergier- und Klassiereinheit vorgesehene Dispergiervorrichtung ist vorzugsweise so ausgebildet, daß sie gleichzeitig als mechanische Reinigungseinrichtung in der Reinigungsphase verwendet werden kann. Dies schließt jedoch nicht aus, daß beide Vorrichtungen voneinander getrennt sein und beispielsweise in der jeweiligen Phase in die Einheit eingefahren und nach Beendigung dieser Phase aus der Einheit herausgefahren werden können.As described above, the system according to the invention designed so that both dispersed and classified can be. The one in the dispersing and classifying unit provided dispersing device is preferably so trained that at the same time as a mechanical cleaning device be used in the cleaning phase can. However, this does not preclude both devices be separated from each other and for example in the respective Phase entered the unit and after completion during this phase can be moved out of the unit can.
Generell schließt die Erfindung nicht aus, daß die hier beschriebene Anlage ausschließlich zum Klassieren verwendet wird, wobei im Ansatzbehälter bereits eine entsprechende zu klassierende Suspension vorliegt oder dort erzeugt wird. In diesem Fall arbeitet die Dispergier- und Klassiereinheit als reine Klassierzentrifuge, und die Dispergiervorrichtung arbeitet als reine mechanische Reinigungsvorrichtung.In general, the invention does not exclude that the one described here System used exclusively for classifying is, a corresponding to already in the batch container classifying suspension is present or is generated there. In in this case the dispersing and classifying unit works as a pure classifying centrifuge, and the dispersing device works as a purely mechanical cleaning device.
Sinn und Zweck der Anlage ist es jedoch, den Dispergiervorgang und den Klassiervorgang in einer einzigen kompakten Einheit durchzuführen, um die Anzahl der erforderlichen Bestandteile zu reduzieren und eine besonders kompakte Bauweise der Einheit zu ermöglichen. Diesbezüglich können natürlich auch zusätzliche Einrichtungen innerhalb des gemeinsamen Gehäuses untergebracht sein, beispielsweise der Speichertank für die den Grobanteil enthaltende Suspension, der Antrieb für die Dispergier- und Klassiereinheit, die Dosiervorrichtung etc.The purpose of the system is, however, the dispersing process and the classification process in a single compact Unit to perform the number of components required to reduce and a particularly compact design of unity. In this regard, of course also additional facilities within the common Housing be housed, for example the Storage tank for the suspension containing the coarse fraction, the drive for the dispersing and classifying unit, the Dosing device etc.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles in Verbindung mit der Zeichnung erläutert. Die einzige Figur zeigt eine schematische Darstellung des Aufbaus einer Anlage zum Naßklassieren von pulverförmigen Substanzen.The invention is described below using an exemplary embodiment explained in connection with the drawing. The only Figure shows a schematic representation of the structure a system for wet classification of powdery substances.
Die Anlage besitzt eine Gehäuse 3, das zur Aufnahme der
meisten Bestandteile der Anlage dient. Ferner hat die Anlage
einen Ansatzbehälter 25 und einen Speicherbehälter 31
sowie entsprechende Rohrleitungen, Pumpen, Ventile, Instrumente
etc., wobei der größte Teil dieser Bestandteile ebenfalls
im Gehäuse 3 untergebracht ist.The system has a housing 3, which is used to hold the
most components of the system. Furthermore, the plant
a batch container 25 and a
Im Gehäuse 3 befindet sich eine kombinierte Dispergier- und Klassiereinheit 12, die ein stationäres Außengehäuse sowie eine vertikal im Außengehäuse angeordnete Schleudertrommel 11 aufweist. Die Schleudertrommel wird über einen Motor und eine senkrechte Welle angetrieben. Von oben ragt in die Schleudertrommel 11 hinein eine kombinierte Dispergier- und Reinigungsvorrichtung 8, die in die Trommel hinein und aus dieser wieder heraus bewegbar ist.In the housing 3 there is a combined dispersing and Classifying unit 12, which is a stationary outer housing as well a centrifugal drum arranged vertically in the outer housing 11 has. The centrifugal drum is powered by a motor and a vertical shaft driven. From above it protrudes into the Centrifugal drum 11 into a combined dispersing and Cleaning device 8 in and out of the drum it can be moved out again.
Zur Beschickung der Dispergier- und Klassiereinheit 12 mit zu klassierender pulverförmiger Substanz ist eine Beschickungseinheit vorgesehen, die einen Big-Bag 2 und eine Dosiervorrichtung 4 umfaßt. Der Big-Bag 2 kann mit Hilfe eines Hebezeuges 1 in die entsprechende Entleerungsposition gebracht, dort abgesetzt und angeschlossen werden. Die Entleerung des Big-Bags 2 kann nach dem Anschließen der Dosiervorrichtung 4 vollautomatisch erfolgen, wobei im vorliegenden Beispiel feinpulvriges Titandioxid kontinuierlich in die Dispergier- und Klassiereinheit 12 eingegeben wird.For loading the dispersing and classifying unit 12 with A powder unit to be classified is a feed unit provided that a big bag 2 and a Dosing device 4 comprises. The Big-Bag 2 can with the help a hoist 1 in the corresponding emptying position brought, dropped off and connected there. The emptying Big-Bags 2 can be connected after connecting the dosing device 4 take place fully automatically, whereby in the present Example of finely powdered titanium dioxide continuously is entered into the dispersing and classifying unit 12.
In einem Ansatzbehälter 25 befindet sich Wasser, das mittels
einer Pumpe 27 über eine Rohrleitung 35 in die
Dispergier- und Klassiereinheit 12 gepumpt wird. Das in der
Rohrleitung 35 angeordnete Ventil 26 ist dabei geöffnet. In
dieser Phase befindet sich die Dispergiervorrichtung 8
innerhalb der Schleudertrommel 11 in Drehung, wobei die
Messer in die Kammern ragen. Ferner rotiert die
Schleudertrommel 11. Über eine Leitung 36 wird die in der
Dispergier- und Klassiereinheit 12 gebildete Suspension aus
der Einheit abgezogen und wieder in den Ansatzbehälter 25
eingeführt. Dabei befindet sich ein Rührer 37 im
Ansatzbehälter in Betrieb. Die Flüssigkeit bzw. die
gebildete Suspension wird somit zwischen Dispergier- und
Klassiereinheit 12 und dem Ansatzbehälter 25 im Kreislauf
geführt.In a batch container 25 there is water, which means
a
Wie vorstehend erwähnt, wird dabei der Big-Bag 2 kontinuierlich
entleert und in die umgewälzte Flüssigkeit (Wasser)
eindispergiert. Der Rührer 37 im Ansatzbehälter 25 rotiert
dabei mit einer bestimmten Drehzahl. Die Schleudertrommel
11 arbeitet während des Eindispergierens mit einer reduzierten
Drehzahl. Das Ventil 19 ist hierbei geschlossen,
und die später erläuterte Überlaufschälvorrichtung 6 ist
aus dem Trommelarbeitsraum herausgeschwenkt, während die
Dispergiervorrichtung 8 eingeschwenkt ist. Das Ventil 17
ist geöffnet.As mentioned above, the big bag 2 becomes continuous
emptied and into the circulated liquid (water)
dispersed. The
Die Antriebseinrichtung für den Rührer 37 ist mit 24
bezeichnet. Ein parallel zum Ventil 26 geschaltetes Ventil
trägt die Bezeichnung 29, während eine parallel zur Pumpe
27 geschaltete Pumpe die Bezeichnung 28 trägt.The drive device for the
Wenn die umgewälzte zu klassierende Suspension die gewünschte
Qualität erreicht hat, was über eine Prüfeinheit
festgestellt wird, wie nachfolgend beschrieben, wird die
Schleudertrommel 11 auf die vorgewählte Klassierdrehzahl
eingestellt. Beim Erreichen dieser Drehzahl schwenkt die
Überlaufschälvorrichtung 6 in den Trommelarbeitsraum ein.
Das Ventil 19 für die klassierte Suspension öffnet. Das
Ventil 16, dessen Funktion später erläutert wird, bleibt
geschlossen, während das Ventil 17 ebenfalls offen ist.If the circulated suspension to be classified is the desired one
Quality has achieved what about a test unit
is determined as described below, the
Centrifugal drum 11 to the preselected classification speed
set. When this speed is reached, the pivots
Overflow peeling device 6 in the drum work space.
The
Die sich im Ansatzbehälter 25 befindende zu klassierende
Suspension wird mit Hilfe der Pumpe 28 über die Rohrleitung
35 bei geöffnetem Ventil 29 der Dispergier- und
Klassiereinheit 12 zugeführt. Der Klassiervorgang läuft nun
vollautomatisch, bis die vorgewählte Klassierzeit
abgelaufen ist.The one to be classified in the batch container 25
Suspension is pumped 28 through the pipeline
35 with the
Während sich der Grobanteil (Grobagglomerate und
Feststoffpartikel) in den Feststoff-Fangräumen der
Schleudertrommel ansammelt, strömt die Suspension durch die
einzelnen Klassierkammern und verläßt die Schleudertrommel
11 gebrauchsfertig im Bereich des oberen Trommelrandes über
die Vorrichtung 6 und die Leitung 38 bei geöffnetem Ventil
22. Die klassierte Suspension wird dann unter Druck durch
den Überwachungsfilter 5 geführt und gelangt über die
Rohrleitung 40 bei geöffnetem Ventil 9 in den
Speicherbehälter 31. Im Vorratsbehälter 31 befindet sich
ein Rührer 41, der einen zugehörigen Antrieb 30 aufweist.
Durch den Rührer 41 wird die gespeicherte Suspension in
Bewegung gehalten. Die Abgabe der klassierten Suspension
erfolgt mittels einstellbarer Pumpe 33 bei geöffnetem
Ventil 32. Aus Sicherheitsgründen ist eine parallel
geschaltete Pumpe vorgesehen.While the coarse fraction (coarse glomerates and
Solid particles) in the solid traps of the
Centrifugal drum accumulates, the suspension flows through the
individual classification chambers and leaves the centrifugal drum
11 ready for use in the area of the upper edge of the drum
the device 6 and the
Im Gehäuse 3 befinden sich des weiteren ein Speichertank 13
für die den Grobanteil enthaltende Suspension und eine Kugelmühle
15. Nach Beendigung der Klassierphase, wenn beispielsweise
50 Vol.-% der Feststoff-Fangräume mit Grobagglomeraten
oder Feststoffpartikeln gefüllt sind, beginnt
die Reinigungsphase. Hierzu wird das Ventil 19 geschlossen.
Das Ventil 17 schließt ebenfalls und das Ventil 16 wird geöffnet.
Die Dispergiervorrichtung 8, die als mechanische
Reinigungsvorrichtung dient, wird in die Schleudertrommel
eingefahren. Es wird kontinuierlich Reinigungsflüssigkeit
zugegeben. Dabei wird so lange gearbeitet, bis die
Feststoff-Fangräume gereinigt sind und die Messer der Dispergiervorrichtung
8 in der Nähe der Trommelwandung stehen.
Das aufgelöste Sediment verläßt die Dispergier- und
Klassiereinheit 12 als pumpfähige Suspension und wird im
Speicherbehälter 13 aufgefangen.There is also a storage tank 13 in the housing 3
for the suspension containing the bulk and a
Zum Abschluß wird die Trommel 11 zum Stillstand gebracht, so daß auch die Restflüssigkeit das System verlassen kann. Anschließend wird eine eingestellte Flüssigkeitsmenge zum Reinigen bei eingeschwenkten Dispergiermessern und drehender Trommel durch die Dispergier- und Klassiereinheit in den Ansatzbehälter 25 gefahren. Hierbei ist das Ventil 17 geöffnet, während das Ventil 16 geschlossen ist.Finally, the drum 11 is brought to a standstill, so that the residual liquid can also leave the system. Then a set amount of liquid is used Clean with swiveled-in dispersing knives and rotating Drum through the dispersing and classifying unit in drove the batch container 25. Here, the valve is 17th opened while the valve 16 is closed.
Das im Speicherbehälter 13 gesammelte redispergierte Sediment wird mit Hilfe einer Pumpe 14 der Mühle 15 (Kugelmühle) zugeführt. In ihr wird der in der Schleudertrommel abgetrennte Grobanteil auf die gewünschte Feinheit gemahlen. Die so erzeugte Feinsuspension wird dem Ansatzbehälter 25 zugeführt und beim nächsten Neuansatz wieder verwendet.The redispersed sediment collected in the storage container 13 with the help of a pump 14 the mill 15 (Ball mill) fed. It will be in the centrifugal drum separated coarse fraction to the desired fineness ground. The fine suspension produced in this way becomes the batch container 25 fed and used again in the next new batch.
Im Gehäuse 3 befindet sich ferner eine Prüfeinheit 10, mit
der vor Ort geprüft werden kann, ob beim Dispergieren
und/oder beim Klassieren der entsprechende Qualitätsgrad
erreicht ist. Dabei wird beim Dispergieren so lange im
Kreislauf gefahren, bis der Grobfiltertest der Prüfeinheit
bestanden ist. Hiernach kann mit dem Klassieren begonnen
werden. Wenn der Feinfiltertest der Prüfeinheit bestanden
ist, kann mit dem Abziehen der klassierten Suspension
begonnen werden.In the housing 3 there is also a
Die erfindungsgemäß ausgebildete Anlage stellt somit ein Höchstmaß an Kompaktheit, Flexibilität und Kontrollmöglichkeit (ohne Zeitverlust, ohne Behälterverunreinigung) zur Verfügung. Die Anlage kann vollautomatisch gefahren werden, und der Personalaufwand ist gering.The system designed according to the invention thus adjusts Maximum compactness, flexibility and control options (without wasting time, without container contamination) for Available. The system can be operated fully automatically, and the personnel expenditure is low.
Ein wesentlicher Vorteil besteht auch darin, daß insbesondere bei feinpulvrigen Produkten durch den beim Dispergieren erzeugten Unterdruck Staub mit eingesaugt und dispergiert wird, so daß nur eine geringe Umweltbelastung entsteht.A major advantage is that in particular in the case of finely powdered products by dispersing them generated vacuum with sucked in and dispersed is so that there is only a small environmental impact.
Claims (9)
- An installation for wet classifying of powdery substances comprising
a dispersing unit with a dispersing device (8),
a classifying unit,
a preparation container (25) for the liquid for dispersing,
a supplying system between the preparation container (25) and the dispersing unit for the dispersing liquid,
a discharging system for the separated coarse portion of the classifying unit,
a storage container (31) for the classified suspension and
a discharging system for the classified suspension of the classifying unit to the storage container (31),
characterized in that
the dispersing unit and the classifying unit are formed as combined dispersing and classifying unit (12) which includes a centrifuging drum (11),
a feeding unit for introducing the powdery substance into the combined dispersing and classifying unit (12) is provided,
the preparation container (25) furthermore serves for the reception of the suspension which is to be classified and which has been produced by dispersing and
a discharging system between the combined dispersing and classifying unit (12) and the preparation container (25) for the suspension to be classified is provided. - The installation according to claim 1, characterized in that the supplying and discharging system between the preparation container (25) and the dispersing and classifying unit (12) enables to qircularly guide the dispersing liquid and the suspension to be classified.
- The installation according to claim 1 or 2, characterized in that it includes a supervising filter (5) introduced into the discharging system for the classified suspension.
- The installation according to one of teh preceding claims, characterized in that it includes a grinding unit (15) for the separated coarse portion.
- The installation according to claim 4, characterized in that it includes means for recirculating the ground coarse portion into the preparation container (25).
- The installation according to one of the preceding claims, characterized in that the feeding unit has a big-bag (2) adapted to be operated by means of lifting means (1).
- The installation according to one of the preceding claims, characterized in that it includes an examination unit (10) for the quality of the suspension to be classified and/or the classified suspension.
- The installation according to one of the preceding claims, characterized in that it comprises an intermediate container for storing the classified suspension prior to the storage container.
- The installation according to one of the claims 4 to 8, characterized in that the dispersing and classifying unit (12), the feeding unit the grinding unit (15), the supervising filter (5) and the examination unit (10) are disposed in a common housing (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914087 | 1999-03-27 | ||
| DE19914087A DE19914087A1 (en) | 1999-03-27 | 1999-03-27 | Wet classifier comprises a dispersing and classifying unit, powder charging unit, and feeding and removal systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1043060A1 EP1043060A1 (en) | 2000-10-11 |
| EP1043060B1 true EP1043060B1 (en) | 2004-03-03 |
Family
ID=7902736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00106281A Expired - Lifetime EP1043060B1 (en) | 1999-03-27 | 2000-03-23 | Compact installation for wet classifying of powdery substances |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1043060B1 (en) |
| AT (1) | ATE260705T1 (en) |
| DE (2) | DE19914087A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3852191A (en) * | 1971-04-23 | 1974-12-03 | Supraton Bruchmann & Zucker Kg | Process and apparatus for the production of a dispersion or solution from comminuted solid substances and a dispersion medium or solvent |
| US4764019A (en) * | 1987-09-01 | 1988-08-16 | Hughes Tool Company | Method and apparatus for mixing dry particulate material with a liquid |
| DE4132066A1 (en) * | 1990-09-27 | 1992-04-02 | Dennis G Pardikes | MIXING DEVICE FOR DRY POLYMERS AND ELECTROLYTE |
| DE9105601U1 (en) * | 1991-05-06 | 1991-06-13 | Süd-Chemie AG, 8000 München | Dispersing plant |
-
1999
- 1999-03-27 DE DE19914087A patent/DE19914087A1/en not_active Withdrawn
-
2000
- 2000-03-23 DE DE50005471T patent/DE50005471D1/en not_active Expired - Lifetime
- 2000-03-23 EP EP00106281A patent/EP1043060B1/en not_active Expired - Lifetime
- 2000-03-23 AT AT00106281T patent/ATE260705T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE50005471D1 (en) | 2004-04-08 |
| DE19914087A1 (en) | 2000-09-28 |
| ATE260705T1 (en) | 2004-03-15 |
| EP1043060A1 (en) | 2000-10-11 |
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