EP1372859B1 - Method for sink and float separation of fine grained mineral raw materials - Google Patents
Method for sink and float separation of fine grained mineral raw materials Download PDFInfo
- Publication number
- EP1372859B1 EP1372859B1 EP02733122A EP02733122A EP1372859B1 EP 1372859 B1 EP1372859 B1 EP 1372859B1 EP 02733122 A EP02733122 A EP 02733122A EP 02733122 A EP02733122 A EP 02733122A EP 1372859 B1 EP1372859 B1 EP 1372859B1
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- Prior art keywords
- liquid
- flow
- sink
- product
- float
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/42—Devices therefor, other than using centrifugal force of drum or lifting wheel type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
- B03B2011/004—Lifting wheel dischargers
Definitions
- the invention relates to a device according to the preamble of Claim 1 and a method according to the preamble of Claim 14.
- the DWP cylinder stands for cylinder and the DSM cyclone stands for cyclones and the washing drum for a sink-swim separating device, whereby the values given apply to the processing of a grain fraction of 3 to 12 mm with cylinder and cyclone and of coarse coal with the washing drum.
- the values for the preparation of the grain fraction 3 to 12 mm with the washing drum would be significantly worse.
- the key figure according to Terra ET which was determined from the division curve according to Tromp, was chosen as a measure of the selectivity. E T values of 0.04 for cylinders and cyclones are more theoretical targets that can hardly be achieved.
- Devices and devices described in the introduction are also from DE 968 121 Method known, the device additionally a second feed and Has pair of drains for the liquid below the liquid level. at the process described therein, the lower liquid flow is so strong that he is heavy in the area on the side of the drum arranged scoops for the sinking / heavy material discharge drives and acts as a transport flow for heavy goods. It can be on heavy cargo adhering floating material are discharged with the sinking material, whereby the Spreading drops.
- the invention is based on the technical problem of a device develop with the mineral raw materials, especially coal small-grained Fractions, according to the density of undesirable accompanying components are separate, and with the high selectivity and performance at low specific energy consumption and equipment throughput can be achieved can, as well as propose a method with which this task is solved can be.
- This task is accomplished by a device with the features of claim 1 and a method with the features of Claim 14 solved.
- the deflection barriers cause the floating material flowing on the surface to be immersed in the heavy cloud bath, causing the grains to move relative to Execute heavy turbidity and thereby of possibly still adhering or trapped particles of sediment are separated so that you can then in can swim again in a different form.
- the in the direction of flow rear deflection barrier has the advantage that it divides the floating material layer and the thickness of the floating material layer is reduced, whereby the heavy material from surrounding floating material is freed and can sink unhindered.
- the Course of the lower edge of the deflection barrier parallel to and short below the liquid level (s) has the advantage that the deflection of the Heavy turbidity flows in a way that is uniform and in essential laminar flow does not interfere.
- the plate has the rear Deflection barrier in the direction of flow parallel shafts on, so that there are only smaller floating material deposits at the bottom of the wave profile form, with their small surface area to a minimum Influencing and braking the flow.
- the waves can have both a rounded and a V-shaped profile.
- the high of The arrangement of the rear deflection barrier is empirically advantageously set so that a desired proportion of the floating material is covered by the deflection barrier and pushed down into the bathroom. A convenient tax base for the proportion to be recorded is the selectivity of the divorced goods, the is to be determined at the overflow.
- the upper feed line extends for the sludge over the entire width of the bathroom.
- This is an essential one Precondition for the formation of a uniform flow over the given full bath width.
- This can be made particularly advantageous if the inflow control the flow profile across its width allows.
- a container extending over the width of the bath with at least one Inlet opening and towards the separating tank a variety evenly spaced openings, the cross section of which is targeted from the inside is reducible.
- This can be done, for example, inside the container arranged and operable from the outside are made with which the free Cross sections of the individual outlet openings can be specifically covered, which the escaping liquid flow is reduced. With such a device irregularities or disturbances of the Flow can be targeted.
- the slope of the chute and the Placing their end above the liquid bath causes the raw material with a speed adjustable by the inclination on the Liquid bath is given up and immersed in it.
- the wavy Training the chute bottom leads to a reduction in the Friction resistance and thus the braking effect of the floor covering.
- the Spraying the feed material with water supports the discharge of the raw material from the chute and dilutes the sludge in the area of the raw material feed, whereby the sinking of the heavy goods components is favored.
- the first deflection barrier is arranged so that it is behind the Throwing parabola of the feed lies so that it does not violate the Deflecting barrier bounces, which leads to a reduction in the feed speed and would lead to the immersion depth of the raw material in the heavy cloud bath.
- the formation of two horizontal liquid flows has the advantage that with the float conveys the upper liquid flow to the overflow and the sink material is caught by the flow at two different bath heights and is moved relative to the slurry, causing the divorced heavy goods sink and adhering floating material can be released and float.
- the detection of the heavy goods from the flow is through the Flow diversion intensified.
- the task of the raw material with high Speed on the liquid bath and the resulting deep Immersion of the debris parts favors the separation of the heavy parts from adhering float particles, which is also due to the spraying of the Raw material with water and the resulting dilution of the heavy sludge in the Area of raw material feed is strengthened.
- FIG. 1 shows a partially sectioned sink-float separating device in FIG shown in perspective.
- the drum 2 is rotatably arranged in the trough-shaped separating container 1 .
- the drum is made by four in the Height adjustable wheels (not shown) with the help of one in a center arranged pinion engaging in the ring gear (also not shown) driven. They are clearly recognizable over the inner circumference of the drum jacket distributed sink bags 3, the walls are designed to be permeable to liquids. That in the sinking bags Discharged sinking material falls when the sinking material pockets are in an upper position be rotated by gravity down onto a chute 4 which brings the sinking material out of the separating container.
- cover plates 5 are arranged in the upper region. That too outgoing raw material is via the feed chute 6, which is a wavy Floor 7 has given up.
- the front deflecting barrier 8 is clearly visible, the shape of an angled plate in the illustrated embodiment has, as well as the rear deflection barrier 9, which from a transverse to Flow direction arranged corrugated plate, which is like that front deflection barrier extends over the entire width of the bathroom.
- the lower one is just above the sump pockets 3 Turbid inlet 11 and opposite the outlet opening 12 of the lower one To recognize cloudy runout.
- the cloudy bath - Boundary plate 14 shown on which one end of the rear Deflection barrier 9 is attached.
- Fig. 2 the front view of a cut device is in operation shown. From the right is the feed chute 6 with the corrugated floor 7 the raw material due to the inclination of the chute 6 at high speed abandoned as quickly as possible on the heavy turbidity bath so that it is in submerges the bath. Approximately at the level of the cloudy bath is on the right 10 fresh slurry fed through the upper slurry inlet while on the same Opposite height of the overflow weir 13 is arranged over which the horizontal flow of floating material is discharged, with corresponding Drain off cloudy quantities. During the heavy goods through the cloudy bath sinks down, the float is separated by the horizontal Heavy turbidity flow promoted to the overflow weir.
- the cloudy stream is through the front deflecting barrier immersed in the cloudy bath and through the rear located in the middle between inlet 10 and overflow weir 13 Deflection barrier 9 deflected.
- Deflection barrier 9 deflected.
- the sinking heavy cargo falls over the scope distributed sink bags 3 and is turned up by the rotation of the drum promoted and carried out.
- the sinkage falls after the corresponding rotation of the Drum onto the sink material chute 4, via which the sink material from the Cutting device is carried out.
- the lower slurry inlet 11 and 11 can also be clearly seen in this illustration the outlet opening of the lower turbidity outlet 12.
- the sinking heavy load is detected and again relative to the turbid flow Heavy turbidity moves, which further separates the sediment shares from adhering floating material transported.
- the float rises again to combine with the upper turbid flow and to be carried out to the overflow weir 13.
- the cover plates 5 arranged in the upper rear area and the Turbid bath - limit plates 14.
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des
Patentanspruchs 1 sowie ein Verfahren nach dem Oberbegriff des
Patentanspruchs 14.The invention relates to a device according to the preamble of
Für die Aufbereitung mineralischer Rohstoffe und deren Scheidung von unerwünschten Begleitbestandteilen, beispielsweise für die Scheidung der in Rohkohle enthaltenen Bergebestandteile und der Reinkohle sind verschiedene Trennverfahren bekannt, die die verschiedenen Bestandteile des Rohgutes aufgrund ihres unterschiedlichen spezifischen Gewichtes trennen, beispielsweise dynamische Verfahren wie Zylinder oder Zyklone, in denen Schwertrübe rotiert und einen Wirbel bildet, oder Setzmaschinen, aber auch statische Verfahren mit Waschtrommeln (Sink- Schwimm- Scheidevorrichtungen). Für die Aufbereitung feinkörniger Mineralgemische, insbesondere auch Rohkohlefraktionen, beispielsweise kleiner 12 mm, kamen bisher, wenn eine hohe Trennschärfe gefordert war, praktisch nur dynamische Trennverfahren mit Zylinder oder Zyklon in Frage, die jedoch den Nachteil geringer Aufgabe- und Durchsatzleistung bei hohem spezifischen Energieverbrauch und Trübedurchsatz haben. Mit Setzmaschinen und Sink- Schwimmscheidevorrichtungen ließen sich zwar höhere Leistungen erzielen, jedoch war die mit diesen Vorrichtungen und entsprechenden Verfahren zu erzielende Trennschärfe nicht ausreichend.For the processing of mineral raw materials and their separation from unwanted accompanying components, for example for the divorce of the The coal components contained in raw coal and the pure coal are different Separation process known that the different components of the raw material separate because of their different specific weights, for example dynamic processes such as cylinders or cyclones, in which heavy turbidity rotates and forms a vortex, or setting machines, but also static processes Washing drums (sinking-swimming-cutting devices). For processing fine-grained mineral mixtures, especially raw coal fractions, For example, smaller than 12 mm, so far came when high selectivity practically only dynamic separation processes with cylinders or cyclones were required in question, which, however, has the disadvantage of low task and throughput high specific energy consumption and turbidity throughput. With Setting machines and sinking swimming separators could be achieve higher performances, however, was with these devices and selectivity to be achieved according to the corresponding method is insufficient.
Diese Situation wird mit der nachstehenden Tabelle verdeutlicht, in der
technische Kennzahlen einiger Trennverfahren für Kohle gegenübergestellt sind.
Dabei steht der D.W.P. Zylinder für Zylinder und der D.S.M. Zyklon für Zyklone
und die Waschtrommel für eine Sink- Schwimm-Scheidevorrichtung, wobei die
angegebenen Werte für die Aufbereitung einer Kornfraktion von 3 bis 12 mm mit
Zylinder und Zyklon und von Grobkohle mit der Waschtrommel gelten. Die Werte
für die Aufbereitung der Kornfraktion 3 bis 12 mm mit der Waschtrommel wären
deutlich schlechter. Als Maß für die Trennschärfe wurde die Kennzahl nach Terra
ET, die aus der Teilungskurve nach Tromp bestimmt wurde, gewählt. Dabei sind
ET-Werte von 0,04 für Zylinder und Zyklon mehr theoretische Zielgrößen, die
praktisch kaum erreicht werden.
Aus DE 11 93 892 und DE 33 27 040 sind eingangs beschriebene Vorrichtungen und Verfahren bekannt.DE 11 93 892 and DE 33 27 040 describe the beginning Devices and methods known.
Auch aus der DE 968 121 sind eingangs beschriebene Vorrichtungen und Verfahren bekannt, wobei die Vorrichtung zusätzlich ein zweites Zu- und Ablaufpaar für die Flüssigkeit unterhalb des Flüssigkeitsspiegels aufweist. Bei dem darin beschriebenen Verfahren ist der untere Flüssigkeitsstrom so stark, daß er Schwergut in den Bereich der auf der Stirnseite der Trommel seitlich angeordneten Schöpfschaufeln für den Sinkgut-/Schwergutaustrag treibt und als Transportströmung für Schwergut wirkt. Dabei kann am Schwergut anhaftendes Schwimmgut mit dem Sinkgut ausgetragen werden, wodurch das Ausbringen absinkt.Devices and devices described in the introduction are also from DE 968 121 Method known, the device additionally a second feed and Has pair of drains for the liquid below the liquid level. at the process described therein, the lower liquid flow is so strong that he is heavy in the area on the side of the drum arranged scoops for the sinking / heavy material discharge drives and acts as a transport flow for heavy goods. It can be on heavy cargo adhering floating material are discharged with the sinking material, whereby the Spreading drops.
Aus der DE 10 53 433 ist eine Vorrichtung und ein
Verfahren bekannt worauf der Oberbegriff der unabhängigen
Ansprüche 1 und 14 basiert. From
Der Erfindung liegt das technische Problem zugrunde, eine Vorrichtung zu
entwickeln, mit der mineralische Rohstoffe, insbesondere Kohle kleinkörniger
Fraktionen, nach der Dichte von unerwünschten Begleitbestandteilen zu
trennen sind, und mit der hohe Trennschärfe und Leistung bei niedrigem
spezifischem Energieverbrauch und Betriebsmitteldurchsatz erreicht werden
können, sowie ein Verfahren vorzuschlagen, mit dem diese Aufgabe gelöst
werden kann. Diese Aufgabe wird durch eine Vorrichtung mit den Merkmalen
des Patentanspruches 1 sowie ein Verfahren mit den Merkmalen des
Patentanspruches 14 gelöst. The invention is based on the technical problem of a device
develop with the mineral raw materials, especially coal small-grained
Fractions, according to the density of undesirable accompanying components
are separate, and with the high selectivity and performance at low
specific energy consumption and equipment throughput can be achieved
can, as well as propose a method with which this task is solved
can be. This task is accomplished by a device with the features
of
Mit der vorgeschlagenen Vorrichtung ist es möglich, ein Schwertrübebad mit einer ruhigen, gleichmäßigen Strömung von der Zulaufseite des Scheidebehälters zur Ablauf- bzw. Überlaufseite aufzubauen. Um störende Einflüsse auf die gleichmäßige Strömung zu vermeiden, wird die Austragetrommel nur langsam gedreht. Insbesondere ist auch darauf zu achten, daß am unteren Zu- und Ablauf gleiche Trübemengen ab- wie zulaufen, damit die Strömung horizontal verläuft und sich keine Vertikalströmungen überlagernWith the proposed device it is possible to use a heavy cloud bath a calm, even flow from the inlet side of the Set up the separating tank to the drain or overflow side. To be distracting Avoiding influences on the uniform flow Discharge drum only rotated slowly. In particular, care must also be taken that at the bottom inlet and outlet the same amounts of turbidity run off, so the flow is horizontal and no vertical flows are superimposed
Mit der vorgeschlagenen Vorrichtung konnte, bei ansonsten gleichen Werten wie mit der herkömmlichen Waschtrommel für Grobkohle, eine Kornfraktion von 3 bis 12 mm mit einem ET von 0,02 und damit einer sehr guten Trennschärfe aufbereitet werden. Es konnte selbst, allerdings mit halber Aufgabemenge von 70 m3/h, eine Kohle-Kornfraktion von 1 bis 3 mm mit sehr sauberem Endprodukt getrennt werden, was auf eine scharfe Trennung hinweistWith the proposed device, with otherwise the same values as with the conventional washing drum for coarse coal, a grain fraction of 3 to 12 mm with an E T of 0.02 and thus a very good selectivity could be processed. It was possible to separate a coal grain fraction of 1 to 3 mm with a very clean end product itself, albeit with half the application rate of 70 m 3 / h, which indicates a sharp separation
Die Umlenkbarrieren bewirken ein Eintauchen des an der Oberfläche strömenden Schwimmgutes in das Schwertrübebad, wodurch die Körner eine Relativbewegung zur Schwertrübe ausführen und dabei von eventuell noch anhaftenden oder eingeschlossenen Sinkkornanteilen getrennt werden, so daß Sie anschließend in geschiedener Form wieder aufschwimmen können. Die in Strömungsrichtung hintere Umlenkbarriere hat den Vorteil, daß sie die Schwimmgutschicht teilt und die Dicke der Schwimmgutschicht reduziert, wodurch das Schwergut vom umgebenden Schwimmgut befreit wird und ungehindert absinken kann. Der Verlauf der unteren Kante der Umlenkbarriere parallel zu dem und kurz unterhalb des Flüssigkeitsspiegel(s) hat den Vorteil, daß die Umlenkung des Schwertrübestroms in einer Weise erfolgt, die die gleichmäßige und im wesentlichen laminare Strömung nicht stört.The deflection barriers cause the floating material flowing on the surface to be immersed in the heavy cloud bath, causing the grains to move relative to Execute heavy turbidity and thereby of possibly still adhering or trapped particles of sediment are separated so that you can then in can swim again in a different form. The in the direction of flow rear deflection barrier has the advantage that it divides the floating material layer and the thickness of the floating material layer is reduced, whereby the heavy material from surrounding floating material is freed and can sink unhindered. The Course of the lower edge of the deflection barrier parallel to and short below the liquid level (s) has the advantage that the deflection of the Heavy turbidity flows in a way that is uniform and in essential laminar flow does not interfere.
In einer bevorzugten Ausführungsform weist die Platte der hinteren Umlenkbarriere in Strömungsrichtung parallel zueinander angeordnete Wellen auf, so daß sich am Grund des Wellenprofils nur kleinere Schwimmgutbeläge bilden, die mit ihrer geringen Oberflächengröße nur zu einer minimalen Beeinflussung und Abbremsung der Strömung führen. Die Wellen können sowohl ein abgerundetes als auch ein V-förmiges Profil aufweisen. Die Höhe der Anordnung der hinteren Umlenkbarriere ist empirisch vorteilhaft so eingestellt, daß ein gewünschter Anteil des Schwimmgutes von der Umlenkbarriere erfaßt und nach unten in das Bad gedrückt wird. Eine zweckmäßige Steuergröße für den zu erfassenden Anteil ist die Trennschärfe des geschiedenen Gutes, die zweckmäßig am Überlauf zu bestimmen ist.In a preferred embodiment, the plate has the rear Deflection barrier in the direction of flow parallel shafts on, so that there are only smaller floating material deposits at the bottom of the wave profile form, with their small surface area to a minimum Influencing and braking the flow. The waves can have both a rounded and a V-shaped profile. The high of The arrangement of the rear deflection barrier is empirically advantageously set so that a desired proportion of the floating material is covered by the deflection barrier and pushed down into the bathroom. A convenient tax base for the proportion to be recorded is the selectivity of the divorced goods, the is to be determined at the overflow.
In einer besonderen Ausführungsform erstreckt sich die obere Zulaufleitung für die Schwertrübe über die gesamte Badbreite. Dadurch ist eine wesentliche Vorbedingung für die Ausbildung einer gleichmäßigen Strömung über die gesamte Badbreite gegeben. Diese läßt sich besonders vorteilhaft gestalten, wenn die Zulaufeinrichtung die Steuerung des Strömungsprofils über ihre Breite ermöglicht. Dies ist beispielsweise durch eine Zulaufeinrichtung möglich, die aus einem sich über die Badbreite erstreckenden Behälter mit mindestens einer Einlauföffnung und zum Scheidebehälter hin einer Vielzahl gleichmäßig beabstandeter Öffnungen besteht, deren Querschnitt gezielt von innen reduzierbar ist. Dies kann beispielsweise durch innerhalb des Behälters angeordnete und von außen bedienbare Blenden erfolgen, mit denen die freien Querschnitte der einzelnen Auslauföffnungen gezielt abdeckbar sind, wodurch der austretende Flüssigkeitsstrom reduziert wird. Mit einer solchen Vorrichtung kann beim Betrieb beobachteten Ungleichmäßigkeiten oder Störungen der Strömung gezielt begegnet werden.In a special embodiment, the upper feed line extends for the sludge over the entire width of the bathroom. This is an essential one Precondition for the formation of a uniform flow over the given full bath width. This can be made particularly advantageous if the inflow control the flow profile across its width allows. This is possible, for example, by means of an inlet device a container extending over the width of the bath with at least one Inlet opening and towards the separating tank a variety evenly spaced openings, the cross section of which is targeted from the inside is reducible. This can be done, for example, inside the container arranged and operable from the outside are made with which the free Cross sections of the individual outlet openings can be specifically covered, which the escaping liquid flow is reduced. With such a device irregularities or disturbances of the Flow can be targeted.
In einer weiteren besonderen Ausführungsform weist die Vorrichtung für die Aufgabe des zu scheidenden Rohgutes eine zum Scheidebehälter hin geneigte Schurre mit einer am Boden angeordneten Platte aus einem in längsrichtung gewellten Profilmaterial auf, deren Ende in einem einstellbaren Abstand oberhalb des Flüssigkeitsbades angeordnet ist. Die Neigung der Schurre und die Anordnung ihres Endes oberhalb des Flüssigkeitsbades bewirkt, daß das Rohgut mit einer durch die Neigung einstellbaren Geschwindigkeit auf das Flüssigkeitsbad aufgegeben wird und in dieses eintaucht. Die wellenförmige Ausbildung des Schurrenbodens führt zu einer Verringerung des Reibungswiderstandes und damit der Bremswirkung des Bodenbelages. Das Besprühen des Aufgabegutes mit Wasser unterstützt den Austrag des Rohgutes von der Schurre und verdünnt die Schwertrübe im Bereich der Rohgutaufgabe, wodurch das Absinken der Schwergutbestandteile begünstigt wird. Wichtig ist auch, daß die erste Umlenkbarriere so angeordnet ist, daß sie hinter der Wurfparabel des Aufgabegutes liegt, damit dieses nicht gegen die Umlenkbarriere prallt, was zu einer Verringerung der Aufgabegeschwindigkeit und damit der Eintauchtiefe des Rohgutes in das Schwertrübebad führen würde.In a further particular embodiment, the device for the Feed of the raw material to be separated inclined towards the separating container Chute with a plate arranged on the floor from one in the longitudinal direction corrugated profile material, the end of which at an adjustable distance above the liquid bath is arranged. The slope of the chute and the Placing their end above the liquid bath causes the raw material with a speed adjustable by the inclination on the Liquid bath is given up and immersed in it. The wavy Training the chute bottom leads to a reduction in the Friction resistance and thus the braking effect of the floor covering. The Spraying the feed material with water supports the discharge of the raw material from the chute and dilutes the sludge in the area of the raw material feed, whereby the sinking of the heavy goods components is favored. Important is also that the first deflection barrier is arranged so that it is behind the Throwing parabola of the feed lies so that it does not violate the Deflecting barrier bounces, which leads to a reduction in the feed speed and would lead to the immersion depth of the raw material in the heavy cloud bath.
Die gleichmäßige Verteilung einer großen Zahl von Sinkguttaschen über den Umfang des Trommelmantels bewirkt, daß sich das Sinkgut entsprechend auf die verschiedenen Sinkguttaschen verteilt und die Taschen nicht ungleichmäßig und übermäßig gefüllt werden. Durch die flüssigkeitsdurchlässige Ausbildung der Wände der Sinkguttaschen in Verbindung mit der nur geringen Befüllung der Taschen mit Sinkgut wird bewirkt, daß beim Herausheben einer Sinkguttasche aus dem Flüssigkeitsbade keine Flüssigkeit abgeschöpft wird und durch das nur geringe Verdrängungsvolumen des Tascheninhaltes der Flüssigkeitsspiegel nicht stark beeinflußt wird.The even distribution of a large number of sinking bags over the The circumference of the drum casing causes the material to be settled accordingly the different sink bags distributed and the bags not unevenly and be filled excessively. Due to the liquid-permeable design of the Walls of the sinking bags in connection with the low filling of the Bags with debris are caused when lifting a debris bag no liquid is skimmed off from the liquid bath and only through that low displacement volume of the pocket contents of the liquid level is not greatly influenced.
Die Ausbildung zweier horizontaler Flüssigkeitsströme hat den Vorteil, daß mit dem oberen Flüssigkeitsstrom das Schwimmgut zum Überlauf hin befördert und das Sinkgut auf zwei unterschiedlichen Badhöhen von der Strömung erfasst und relativ zur Schwertrübe bewegt wird, wodurch das geschiedene Schwergut absinken und anhaftendes Schwimmgut gelöst werden und aufschwimmen kann. Die Erfassung des Schwergutes von der Strömung wird durch die Strömungsumlenkung intensiviert. Die Aufgabe des Rohgutes mit hoher Geschwindigkeit auf das Flüssigkeitsbad und das dadurch bewirkte tiefe Eintauchen der Sinkgutteile begünstigt die Trennung der Schwergutteile von anhanftenden Schwimmgutkörnern, was auch durch die Besprühung des Rohgutes mit Wasser und die dadurch bewirkte Verdünnung der Schwertrübe im Bereich der Rohgutaufgabe verstärkt wird.The formation of two horizontal liquid flows has the advantage that with the float conveys the upper liquid flow to the overflow and the sink material is caught by the flow at two different bath heights and is moved relative to the slurry, causing the divorced heavy goods sink and adhering floating material can be released and float. The detection of the heavy goods from the flow is through the Flow diversion intensified. The task of the raw material with high Speed on the liquid bath and the resulting deep Immersion of the debris parts favors the separation of the heavy parts from adhering float particles, which is also due to the spraying of the Raw material with water and the resulting dilution of the heavy sludge in the Area of raw material feed is strengthened.
Die Vorteile der Erfindung werden verdeutlicht bei der Beschreibung eines Ausführungsbeispiels, das in beigefügter Zeichnung dargestellt ist. In der Zeichnung zeigt
- Fig.1
- in perspektivischer Darstellung eine teilweise geschnittene Sink- Schwimm-Scheidevorrichtung und
- Fig.2
- die Frontansicht einer geschnittenen Vorrichtung gemäß Fig. 1 in Betrieb.
- Fig.1
- in perspective a partially sectioned sink-swimming-cutting device and
- Fig.2
- the front view of a sectioned device according to FIG. 1 in operation.
In Fig. 1 ist eine teilweise geschnittene Sink - Schwimm - Scheidevorrichtung in
perspektivischer Darstellung gezeigt. In dem trogförmigen Scheidebehälter 1 ist
die Trommel 2 drehbeweglich angeordnet. Die Trommel wird durch vier in der
Höhe einstellbare Räder (nicht dargestellt) mit Hilfe eines in einen mittig
angeordneten in den Zahnkranz eingreifenden Ritzels (ebenfalls nicht
dargestellt) angetrieben. Deutlich zu erkennen sind die über den Innenumfang
des Trommelmantels verteilten Sinkguttaschen 3, deren Wände
flüssigkeitsdurchlässig ausgebildet sind. Das in den Sinkguttaschen
ausgetragene Sinkgut fällt, wenn die Sinkguttaschen in eine obere Position
gedreht werden, durch Schwerkraft nach unten auf eine Sinkgutschurre 4, durch
die das Sinkgut aus dem Scheidebehälter herausgebracht wird. Um zu
verhindern, das Sinkgut zurück auf das Trübebad bzw. das darauf schwimmende
Schwimmgut fällt, sind im oberen Bereich Abdeckbleche 5 angeordnet. Das zu
scheidende Rohgut wird über die Aufgabeschurre 6, die einen wellenförmigen
Boden 7 hat, aufgegeben. Gut zu erkennen sind die vordere Umlenkbarriere 8,
die im dargestellten Ausführungsbeispiel die Form einer abgewinkelten Platte
hat, sowie die hintere Umlenkbarriere 9, die aus einer quer zur
Strömungsrichtung angeordneten gewellten Platte besteht, die sich wie die
vordere Umlenkbarriere über die gesamte Badbreite erstreckt. Deutlich zu
erkennen sind der obere Trübeeinlauf 10 und das auf gleicher Höhe gegenüber
angeordnete Überlaufwehr 13. Kurz oberhalb der Sinkguttaschen 3 ist der untere
Trübeeinlauf 11 sowie gegenüberliegend die Auslauföffnung 12 des unteren
Trübeauslaufs zu erkennen. Im oberen hinteren Bereich ist das Trübebad -
Begrenzungsblech 14 dargestellt, an dem das eine Ende der hinteren
Umlenkbarriere 9 befestigt ist.1 shows a partially sectioned sink-float separating device in FIG
shown in perspective. In the trough-shaped separating
In Fig. 2 ist die Frontansicht einer geschnittenen Vorrichtung in Betrieb
dargestellt. Von rechts wird über die Aufgabeschurre 6 mit dem gewellten Boden
7 das Rohgut durch die Neigung der Schurre 6 mit hoher Geschwindigkeit
möglichst ungebremst auf das Schwertrübebad derart aufgegeben, daß es in
das Bad eintaucht. Etwa auf Höhe des Trübebades wird auf der rechten Seite
über den oberen Trübeeinlauf 10 frische Trübe zugeführt, während auf gleicher
Höhe gegenüberliegend das Überlaufwehr 13 angeordnet ist, über das der
horizontale Schwimmgutstrom ausgetragen wird, wobei auch entsprechende
Trübemengen mit abfließen. Während der Schwergutanteil durch das Trübebad
nach unten absinkt, wird das Schwimmgut durch die horizontale
Schwertrübeströmung zum Überlaufwehr gefördert. Der Trübestrom wird durch
die in das Trübebad eintauchende vordere Umlenkbarriere sowie durch die etwa
in der Mitte zwischen Zulauf 10 und Überlaufwehr 13 angeordnete hintere
Umlenkbarriere 9 umgelenkt. Durch die Umlenkung des Trübestroms werden die
oben schwimmenden Schwimmgutanteile nach unten in das Bad gedrückt,
wodurch die Trennung von Sinkgutanteilen von anhaftenden
Schwimmgutkörnern intensiviert und insgesamt der Scheideeffekt günstig
beeinflußt wird. Das absinkende Schwergut fällt in die über den Umfang
verteilten Sinkguttaschen 3 und wird durch die Drehung der Trommel nach oben
gefördert und ausgetragen. Das Sinkgut fällt nach entsprechender Drehung der
Trommel auf die Sinkgutschurre 4, über die das Sinkgut aus der
Scheidevorrichtung ausgetragen wird. In Fig. 2 the front view of a cut device is in operation
shown. From the right is the
Gut zu erkennen ist in dieser Darstellung auch der untere Trübeeinlauf 11 und
die auf gleicher Höhe gegenüberliegend angeordnete Auslauföffnung des
unteren Trübeauslaufs 12. Durch den zwischen diesen gebildeten horizontalen
Trübestrom wird das absinkende Schwergut erfaßt und noch einmal relativ zur
Schwertrübe bewegt, was eine weitere Trennung der Sinkgutanteile von
anhaftenden Schwimmgutanteilen befördert. Nach dieser zweiten Trennstufe
steigt das Schwimmgut wieder auf, um mit der oberen Trübeströmung vereint
und zum Überlaufwehr 13 hin ausgetragen zu werden. Deutlich zu erkennen sind
auch die im oberen hinteren Bereich angeordneten Abdeckbleche 5 und die
Trübebad - Begrenzungsbleche 14. The
- 1)1)
- Scheidebehälter (Trog)Separating tank (trough)
- 2)2)
- Trommeldrum
- 3)3)
- Sinkguttaschensink-product pockets
- 4)4)
- SinkgutschurreSinkgutschurre
- 5)5)
- Abdeckblecheflashings
- 6)6)
- Aufgabeschurrechute
- 7)7)
- wellenförmiger Bodenwavy bottom
- 8)8th)
- vordere Umlenkbarrierefront deflection barrier
- 9)9)
- hintere Umlenkbarriererear deflection barrier
- 10)10)
- Oberer TrübeeinlaufUpper cloudy inlet
- 11)11)
- Unterer TrübeeinlaufLower cloudy inlet
- 12)12)
- Auslauföffnung unterer TrübeauslaufOutlet opening lower turbid outlet
- 13)13)
- ÜberlaufwehrOverflow weir
- 14)14)
- Trübebad - BegrenzungsblecheTurbid bath - boundary plates
Claims (20)
- An apparatus for the sink-and-float separation of mineral raw materials, in particular coal, according to density by means of a liquid, in particular a dense medium, consisting of a separating vessel (1) having a drum (2) rotatably arranged therein for the discharge of the sink product, the separating vessel having inlets (6, 10, 11) for the liquid and the raw material to be separated and outlets (12, 13) for the liquid, the outlet (13) being designed as an overflow for separating the float product, and the inlets and outlets (10, 11; 12, 13) being arranged parallel to the axis of rotation of the drum (2), and at least two outlets and inlets (10, 11; 12; 13) being provided in each case for the liquid and being arranged in each case opposite one another in pairs at one height, at least one inlet and one outlet (10; 13) and the overflow (13) being arranged at the height of the liquid level, and at least one inlet and outlet pair (11, 12) being arranged just above sink-product pockets (3) distributed over the circumference of the drum shell,
characterized in that at least two deflecting barriers (8, 9) projecting into the liquid from above and arranged over the entire width transversely to the direction of flow are provided, of which deflecting barriers (8, 9) at least one is arranged just behind the point at which the raw material to be separated is delivered into the liquid and at least one is arranged approximately in the center between inlet and outlet for the liquid in such a way that the rear deflecting barrier in the direction of flow divides the float-product layer horizontally. - The apparatus as claimed in claim 1, characterized in that the first barrier (8) in the direction of flow is arranged in such a way that it lies downstream of the trajectory parabola of the feed material.
- The apparatus as claimed in claim 2, characterized in that the deflecting barrier (8) consists of a plate which is angled transversely to the direction of flow and whose bottom leg is directed obliquely downward in the direction of flow and whose bottom edge is arranged parallel to and just below the liquid level.
- The apparatus as claimed in claim 1, characterized in that the deflecting barrier (9) arranged approximately centrally between inlet and outlet consists of a corrugated plate, the corrugations of which lie parallel to one another in the direction of flow, the plate being arranged obliquely in such a way that its leading edge lies approximately at the height of the liquid level and parallel thereto and its trailing edge lies below the leading edge.
- The apparatus as claimed in claim 4, characterized in that the corrugations have a rounded-off profile.
- The apparatus as claimed in claim 4, characterized in that the corrugations have a V-shaped profile.
- The apparatus as claimed in at least one of claims 1 to 6, characterized in that the top inlet device (10) for the liquid extends over the entire bath width.
- The apparatus as claimed in claim 7, characterized in that the inlet device (10) permits the control of the flow profile over its width.
- The apparatus as claimed in claim 8, characterized in that the inlet device (10) is a vessel extending over the bath width and having at least one inlet opening and, toward the separating vessel (1), a multiplicity of equispaced outlet openings, the cross section of which can be specifically reduced from inside.
- The apparatus as claimed in at least one of claims 1 to 9, characterized in that, for the delivery of the raw material to be separated,-it has a chute (6) which is inclined toward the separating vessel (1) and whose base (7) has a profile corrugated in the longitudinal direction and ends at an adjustable distance above the liquid bath.
- The apparatus as claimed in claim 10, characterized in that a device for spraying the feed material with water in the direction of the separating vessel (1) is arranged above the delivery chute (6).
- The apparatus as claimed in at least one of claims 1 to 11, characterized in that a large number of sink-product pockets (3) are distributed uniformly over the circumference.
- The apparatus as claimed in claim 12, characterized in that the walls of the sink-product pockets (3) are designed to be permeable to the liquid.
- A method for the sink-and-float separation of mineral raw materials, in particular coal, according to density by means of a liquid, in particular a dense medium, in which liquid is fed via inlets into a separating vessel having a drum rotatably arranged therein and is discharged via outlets, arranged opposite said inlets at the same height, in such a way that a liquid bath builds up in the separating vessel, the level of this liquid bath lying approximately at the height of the axis of rotation of the drum, and a horizontal flow parallel to the axis of rotation of the drum from the inlet to the associated outlet results inside the liquid bath, the feed material to be separated being delivered parallel to the liquid in such a way that it plunges into the liquid bath and is caught by the liquid flow, the float product on the side opposite the feed being separated by means of an overflow, and the sink product sinking through the liquid bath, characterized in that at least two horizontal uniform and essentially laminar liquid flows are formed which only transport float product to the discharge side and of which at least one lies directly at and below the liquid level and at least one lies just above sink-product pockets (3) distributed over the circumference of the drum shell, and the liquid flow at the liquid level is deflected by at least two barriers (8, 9) which are arranged transversely to the direction of flow and which project into the liquid bath from above, at least one being arranged directly downstream of the inlet and at least one being arranged approximately centrally between inlet and associated outlet.
- The method as claimed in claim 14, characterized in that the top liquid flow is uniformly regulated over the entire bath width.
- The method according to at least one of claims 14 and 15, characterized in that the raw material is delivered to the liquid bath at high speed.
- The method according to at least one of claims 14 to 16, characterized in that the bottom uniform and essentially laminar flow moves the sink product relative to the dense medium and releases float-product fractions adhering to the sink product, so that these float-product fractions can rise into the region of the top liquid flow in order to be discharged with the rest of the float product.
- The method as claimed in at least one of claims 15 to 17, characterized in that the float-product layer is divided by the rear deflecting barrier and reduced in its thickness.
- The method as claimed in at least one of claims 15 to 18, characterized in that the rear deflection of the liquid flow is effected in such a way that a predeterminable fraction of the material floating at the surface is caught and forced into the liquid.
- The method as claimed in at least one of claims 16 to 19, characterized in that the raw material is sprayed with water and water-jetted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10116027A DE10116027A1 (en) | 2001-03-30 | 2001-03-30 | Process for sink-swim separation of fine-grained mineral raw materials |
| DE10116027 | 2001-03-30 | ||
| PCT/IB2002/002016 WO2002078850A2 (en) | 2001-03-30 | 2002-03-01 | Method for sink and float separation of fine grained mineral raw materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1372859A2 EP1372859A2 (en) | 2004-01-02 |
| EP1372859B1 true EP1372859B1 (en) | 2004-08-11 |
Family
ID=7679844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02733122A Expired - Lifetime EP1372859B1 (en) | 2001-03-30 | 2002-03-01 | Method for sink and float separation of fine grained mineral raw materials |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7004327B2 (en) |
| EP (1) | EP1372859B1 (en) |
| DE (2) | DE10116027A1 (en) |
| WO (1) | WO2002078850A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070294858A1 (en) * | 2006-06-23 | 2007-12-27 | Murphy Jerry A | Portable Vacuum Canister and Method of Waste Disposal Therefrom |
| CN112439540B (en) * | 2019-08-30 | 2022-08-30 | 中国石油天然气股份有限公司 | Light and heavy mineral separation device and method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1392401A (en) * | 1918-07-08 | 1921-10-04 | Henry M Chance | Method and apparatus for classifying materials |
| US1559938A (en) * | 1922-07-07 | 1925-11-03 | Thomas M Chance | Apparatus for separating materials of different specific gravities |
| US2590756A (en) * | 1946-05-10 | 1952-03-25 | Mines Domaniales De Potasse | Art of mineral separation |
| DE968121C (en) * | 1951-01-09 | 1958-01-16 | Schuechtermann & Kremer Baum A | Drum sink separator for processing minerals, in particular hard coal |
| US2760633A (en) * | 1952-05-06 | 1956-08-28 | Nelson L Davis | Method of and apparatus for sink and float separation of fine coal and the like |
| GB804616A (en) | 1956-11-05 | 1958-11-19 | Klaas Frederik Tromp | Improvements in and relating to apparatus for separating granular materials having different specific gravities by means of a liquid |
| DE1053433B (en) * | 1956-11-05 | 1959-03-26 | Klaas Frederik Tromp Dipl Ing | Device for swimming and sinking treatment of solids of different specific weights |
| DE1031234B (en) * | 1957-06-19 | 1958-06-04 | Eisen & Stahlind Ag | Sink separator for separating minerals |
| GB1050259A (en) * | 1964-04-25 | |||
| US4267980A (en) * | 1979-11-26 | 1981-05-19 | Cal West Metals | Separator |
| DE3327040A1 (en) * | 1983-07-27 | 1985-02-07 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Apparatus for the sink-swim separation of mineral raw materials |
| US5082553A (en) * | 1990-12-18 | 1992-01-21 | Masao Tanii | Concrete aggregate collecting apparatus |
| US5495949A (en) * | 1993-07-09 | 1996-03-05 | Olivier; Paul A. | System for treating solid particles in a medium |
-
2001
- 2001-03-30 DE DE10116027A patent/DE10116027A1/en not_active Withdrawn
-
2002
- 2002-03-01 EP EP02733122A patent/EP1372859B1/en not_active Expired - Lifetime
- 2002-03-01 WO PCT/IB2002/002016 patent/WO2002078850A2/en not_active Ceased
- 2002-03-01 US US10/473,514 patent/US7004327B2/en not_active Expired - Fee Related
- 2002-03-01 DE DE50200821T patent/DE50200821D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002078850A3 (en) | 2002-12-05 |
| DE10116027A1 (en) | 2002-10-10 |
| DE50200821D1 (en) | 2004-09-16 |
| US20040164002A1 (en) | 2004-08-26 |
| US7004327B2 (en) | 2006-02-28 |
| WO2002078850A2 (en) | 2002-10-10 |
| EP1372859A2 (en) | 2004-01-02 |
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