EP3209435B1 - Classifying device for classifying a granular material flow - Google Patents
Classifying device for classifying a granular material flow Download PDFInfo
- Publication number
- EP3209435B1 EP3209435B1 EP15780822.1A EP15780822A EP3209435B1 EP 3209435 B1 EP3209435 B1 EP 3209435B1 EP 15780822 A EP15780822 A EP 15780822A EP 3209435 B1 EP3209435 B1 EP 3209435B1
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- EP
- European Patent Office
- Prior art keywords
- disk
- classifier
- classifying
- inlet
- static
- Prior art date
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- 239000008187 granular material Substances 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims description 105
- 230000003068 static effect Effects 0.000 claims description 60
- 239000004568 cement Substances 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/086—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by the winding course of the gas stream
Definitions
- the invention relates to a viewing device for viewing a granular material flow.
- a sifter It is known to divide granular material such as cement, cement-containing substances, slag, limestone or ores into a coarse and a fine grain fraction by means of a sifter.
- classifiers are connected downstream of a material shredding device, such as a roller mill, for example, the coarse material emerging from the classifier being fed back to the material shredding device.
- Known sifters are, for example, static sifters in which a coarse material sifting takes place via impact and guiding devices, and dynamic sifters in which a fine material sifting takes place, for example via a rotating rod basket. From the DE 10 2004 027 128 A1 a viewing device is known which has a static sifter and a dynamic sifter, the static sifter forming the first viewing stage and the dynamic sifter forming the second viewing stage.
- a sighting device for sighting a granular material flow comprises a first inlet for admitting a first material flow into the sighting device and a second inlet for admitting a second material flow into the sighting device.
- the viewing device comprises a static sifter and a dynamic sifter, the static sifter being arranged in such a way that it at least partially encloses the dynamic sifter.
- the classifier furthermore has a distributor device which is designed such that it feeds the material flow from the first inlet to the static classifier and feeds the material flow from the second inlet to the dynamic classifier.
- Such a distributor device offers the advantage that at least two material flows of different grain sizes can be fed to the classifier, the material flow entering through the first inlet flowing through the static classifier and the dynamic classifier and the material flow entering the classifying device through the second inlet exclusively through the dynamic classifier flows through.
- the viewing device preferably has one or a plurality of first and second inlets through which the material to be viewed enters the viewing device.
- the material flow entering through the first inlet is, for example, a coarse-grained material relative to the material flow entering the classifying device through the second inlet.
- This coarse-grained material can come from a roller mill or a material bed roller mill, for example.
- the material flow entering the classifying device through the second inlet can, for example, be a material comminuted by means of a ball mill.
- the described viewing device makes it possible to dispense with an additional viewing device for each of the material flows and, on the other hand, enables both material flows to be viewed by means of a single viewing device.
- the granular material flow can in particular be cement raw material, cement, cement-containing substances, limestone, slag or ores.
- a static sifter comprises a plurality of flow devices, for example guide vanes, which serve to deagglomerate the material flow flowing through the static sifter.
- the static sifter is designed in particular in such a way that it forms a cylinder-ring-shaped sifting zone between the flow devices and the dynamic sifter is arranged within the static sifter.
- the static sifter is fed via a sifting air duct, for example by means of a fan, sifting air, which is guided via the plurality of guide vanes of the flow device against the material flow flowing through the static sifter.
- the coarser grain fraction of the material stream flowing into the classifier through the first inlet leaves the static classifier through a first outlet, the finer grain fraction of the material stream being conveyed to the dynamic classifier through the classifier air.
- a dynamic sifter comprises a moving viewing zone, for example a rotatable rod basket, into which a material flow with a small grain size, in particular up to about 10 mm, enters.
- the dynamic sifter is arranged, for example, coaxially to the static sifter and rotationally symmetrical to the drive axis of the moving viewing zone.
- the material flow of medium grain size is rejected by the dynamic classifier and exits the classifier through a second outlet.
- the material flow that passes through the dynamic classifier has a grain size of up to about 300 ⁇ m and emerges from the classifier through a third outlet.
- the material flow entering the classifier through the second inlet is fed to the dynamic classifier via the distributor device, the material rejected by the dynamic classifier leaving the classifying device through the second outlet and the material that has entered the moving classifying zone of the dynamic classifier exiting the third outlet exits the viewing device.
- the viewing device according to the invention enables two material flows of different grain sizes to be divided into three grain fractions.
- the coarse grain fraction sifted in the static sifter can be fed to a first comminution device, such as a roller mill, while the middle grain fraction sifted in the dynamic sifter can be fed to a second comminution device, such as a ball mill. In this way, a particularly compact design of a classifier with a static and a dynamic classifier is achieved.
- the grain sizes of the coarse material flow entering the classifier through the first inlet are up to about 100 mm.
- the grain sizes of the fine material flow entering the classifier through the second inlet are up to about 10 mm.
- the distributor device has at least one rotatable disk.
- the at least one rotatable disk is connected, for example, to a drive shaft and is driven to rotate.
- the drive shaft can be, for example, the drive axis of the movable viewing zone of the dynamic sifter.
- the impact of the material flow entering the classifying device on a rotating disk ensures a deagglomeration of the granular material.
- the rotation of the disc moves the material radially outwards and thus distributes it evenly over the viewing zone of the static sifter and / or the dynamic sifter.
- the at least one rotatable disk is arranged, for example, to feed the material flow from the first inlet to the static classifier or to feed the material flow from the second inlet to the dynamic classifier.
- the distributor device has at least one area which is connected to the housing of the viewing device.
- the area of the distributor device connected to the housing is preferably non-rotatable and is arranged to feed the material flow from the first inlet to the static classifier or to feed the material flow from the second inlet to the dynamic classifier.
- the distributor device has a first rotatable disk for feeding the material flow from the first inlet to the static classifier and a second rotatable disk for feeding the material flow from the second inlet to the dynamic classifier. This ensures a deagglomeration of the first and the second material stream before they are fed to the static or dynamic classifier.
- the at least one rotatable disk is connected to a drive shaft.
- the at least one rotatable disk is arranged, for example, rotationally symmetrically around the drive shaft, the drive shaft being, for example, the drive shaft of the movable viewing zone of the dynamic classifier.
- At least one of the first disk and the second disk is an annular disk.
- the other of the first and second disks is designed as a circular disk, for example.
- a circular configuration of one of the disks enables the disks to be arranged in parallel, with, for example, the first disk for feeding the material flow to the static classifier being arranged above the second disk so that the material flow entering through the first inlet through the second, upper disk onto the first slice falls.
- This enables a particularly compact design of the distribution device.
- first disk and the second disk are connected to one another via connecting means.
- a connection of the first and the second disk realizes a simple drive of both disks via a drive shaft.
- At least one of the first disk and the second disk of the distributor device has a plurality of guide elements on the surface of the disc.
- Such guide elements ensure a deagglomeration of the material when it hits the surface of the panes and also ensure reliable guidance of the material to the static or dynamic classifier.
- means for deagglomeration of the material are preferably arranged on the surface of at least one of the first or second panes, which means, for example, bring about a rough, granular surface structure of the panes.
- the guide elements are rod-shaped and extend radially outward.
- the guide elements comprise the connecting means between the first disk and the second disk.
- the guide elements are, according to a further embodiment, plate-shaped and are arranged, for example, orthogonally to the panes. This enables a simple connection of the first and the second disk with simultaneous use of the connection means as guide elements for guiding the flow of material.
- a grinding plant for comminuting ground material comprises at least one grinding device and a viewing device, which is connected to the at least one grinding device, for classifying the ground material, as described above.
- the at least one grinding device comprises, for example, a roller mill or a ball mill, the first outlet and the second outlet of the classifying device being connected to an inlet of the grinding device.
- the outlet of the grinding device is preferably connected to the second inlet of the classifier device.
- the grinding plant preferably has a roller mill and a ball mill, the roller mill being connected to the first inlet of the classifying device and the second outlet of the classifying device being connected to the ball mill.
- Fresh material fed into the grinding system is fed into the first inlet of the classifier. That from the first outlet of the viewing device Any coarse ground material that emerges is fed to the roller mill, with the medium-grain size semolina that emerges from the second outlet of the classifier being fed to the ball mill.
- the fine finished product emerging from the third outlet of the classifier is guided out of the grinding system, for example, via a separator in which the air / grist mixture is separated into grist and air.
- a grinding plant described above with a viewing device of the type described above has a small number of components, such as, for example, lines between a plurality of viewing devices and a plurality of grinding devices.
- the sifting of the grist streams of one or more grinding devices is realized with a viewing device which divides the grist stream into three different grain sizes and thus enables a supply of grist with optimal grain size to a corresponding grinding device. An efficient and cost-effective grinding process is thus achieved.
- the reduced number of components reduces the maintenance intensity of the grinding system.
- Fig. 1 shows a viewing device 10 with a static sifter 20 and a dynamic sifter 22.
- the static sifter 20 is off in the exemplary embodiment Fig. 1 arranged around the dynamic sifter 22 and has a cylindrical ring-shaped shape.
- the static sifter comprises an outer one cylindrical wall 29 and a first, outer static flow device 25 and a second, inner static flow device 26 arranged radially inwards are.
- the guide vanes of the second flow device 26 are positioned in the opposite direction to the guide vanes of the first flow device 26.
- a cylindrical static viewing zone 27 is formed between the first and the second flow device 25, 26.
- the dynamic sifter 22 is arranged radially inward of the second flow device 26.
- the dynamic classifier 22 comprises a rod basket 23 with rods extending in the axial direction.
- the rod cage 23 is driven in rotation via a drive shaft 28 attached to the upper end of the rod cage.
- the dynamic classifier 22 is shown in FIG Fig. 1 arranged coaxially to the static classifier 20 and rotationally symmetrical to the drive shaft 28.
- the dynamic viewing zone 31 is formed between the viewing basket and the second flow device 26. Furthermore, in the dynamic viewing zone 31 in Fig. 1 Vertical, rod-shaped guide elements (not shown), which adjoin the flow device 25, may be arranged.
- a distributor device 42 is arranged, which has a first disk 38 and a parallel second disk 40.
- the second disk 40 has the same diameter as the rod basket 23, is firmly connected to it and forms a cover of the cylindrical rod basket 23.
- the first disk 38 is arranged parallel to the second disk 40 above the latter and is annular, with a recess in trained in the middle.
- a passage is formed between the first disk 38 and the second disk 40.
- the first disk 38 and the second disk 40 are on in Fig. 1 Connected to one another in a manner not shown, so that a rotation of the second disk 40, which is fixedly connected to the rod cage 23, causes a rotation of the first disk 38.
- a first inlet 14 and a second inlet 12 for admitting a material flow into the viewing device are arranged above the distributor device 42.
- the inlets 12, 14 in the exemplary embodiment according to FIG Fig. 1 concentric, openings arranged around the drive shaft 28, which include inlets shown in the form of a tube, the inlet opening of the first inlet 14 being arranged above the inlet opening of the second inlet 12.
- the drive shaft 28 of the dynamic classifier 22 extends centrally, in the axial direction, through the second inlet 14.
- a classifying air duct 36 is arranged around the static classifier 20.
- the classifying air duct 36 is in the in Fig. 1
- the illustrated embodiment is shown schematically on the side, on the left side of the static sifter 20.
- the classifying air channel 36 is in fluid connection with the static classifier, so that classifying air can flow from the outer wall 29 of the static classifier 20 through the external static flow device 25 into the classifying zone 27 of the static classifier 20.
- the direction of flow of the classifying air is in Fig. 1 represented by the direction of the arrow in the classifying air duct 36.
- Fig. 1 further shows three outlets 30, 32, 34 for discharging the sighted material flow from the viewing device 10.
- the first outlet 30 comprises a channel which is arranged below the static viewing zone 27 in such a way that the material rejected in the static viewing zone falls into the channel and exits the viewing device 10 through the outlet 30.
- the second outlet 32 comprises a channel which is arranged below the dynamic viewing zone 31 in such a way that the material rejected by the dynamic separator falls into the channel and exits the separating device 10 through the outlet 32.
- the third outlet 34 has a channel which is arranged below the rod cage 23 and through which the material passed through the static and dynamic sifting stages 27, 31 emerges from the sifting device 10 together with the sifting air inside the rod cage 23.
- a coarse stream of material flows in the direction of arrow 16 through the first inlet 14 onto the first disk 38, which is driven to rotate via the drive shaft 28.
- the material on the disk 38 is moved radially outward and reaches the static classifier 20 from above into the static viewing zone 27.
- the impact of the material flow on the disk 38 and the rotation of the disk 38 also ensure a deagglomeration of the material.
- classifying air enters the static classifier 20 and flows through the outer flow device 25 against the static viewing zone 27 flowing through material flow.
- the material flow is deflected radially inward to the inner flow device 26 by the entering classifying air.
- the coarse material flows through the static classifying stage 27 and falls down to the first outlet 30.
- the finer material is blown by the classifying air through the inner flow device 26 into the dynamic classifying zone 31.
- the coarse material falls down to the second outlet 32 and the finer material passes through the rods of the rod basket 23 into the interior of the rod basket.
- the finer material inside the rod basket 23 falls down to the third outlet 34.
- the viewing device 10 has three outlets 30, 32, 34 for three different grain fractions of the material flow.
- the stream of material flowing into the classifier 10 through the first inlet 14 is classified into three different grain fractions, which leave the classifier 10 through three different outlets 30, 32, 34.
- the material flow entering the separating device 10 through the second inlet 12 passes through the separating device in the direction of the arrow 18 and first flows onto the second disk 40, which is driven to rotate by the drive axle.
- the material is moved radially outward by the rotation of the disk 40 and enters the dynamic classifying zone 31, which adjoins the second disk 40, in the dynamic classifier 22.
- the coarser material falls through the dynamic classifying zone down to the second outlet 32. It is conceivable that the material exiting through the outlet 30 and that through then at least partially combine material exiting outlet 32 and feed it to a grinding device.
- the finer material enters the rod basket 23 and is discharged downwards together with the classifying air in the direction of the third outlet 34. It is also conceivable to let the material that has passed through the rod cage 23 emerge above the dynamic sifter 22 from the sifting device 10, the outlet 34 being opened in Fig. 1 way not shown, is arranged above the rod basket.
- the material entering the classifier through the second inlet 12 is classified into two grain sizes, with the finer material passing through the third outlet 34 and the coarser material is discharged from the viewing device through the second outlet 32.
- the classifier 10 enables two material flows of different grain sizes to be fed into the classifier, the first material flow being fed to both the static classifier 20 and the dynamic classifier 22 and the second material flow being fed exclusively to the dynamic classifier 22.
- This enables an inlet of a coarse material stream from, for example, a roller mill through the first inlet 14 and an inlet of a finer material stream from, for example, a ball mill through the second inlet 12 into the classifying device 10.
- the described viewing device 10 enables a considerable saving of space, since one viewing device is used for two material flows and an additional separator can be dispensed with.
- Fig. 2 shows a plan view of a distributor device 52 according to an embodiment.
- the structure of the distributor device 52 corresponds to the expansion of FIG Fig. 1 described distributor device 42, wherein the distributor device 52 comprises two disks, a first disk 48 and a second disk 50, which are arranged parallel to one another, wherein the first disk 48 is arranged above the second disk 50.
- the distributor device 52 in the exemplary embodiment Fig. 2 Guide elements 44 on the first disk 48 and on the second disk 50.
- the guide elements comprise elongated struts which are attached to the upper side of the disks 48, 50 and extend in a star shape in the radial direction. Overall, in the exemplary embodiment in Fig. 2 each disk 48, 50 has eight such guide elements 44.
- the guide elements 44 attached to the disks 48, 50 ensure that the material flow is directed radially outwards when the viewing device 10 is in operation.
- the guide elements 44 provide an impact surface for the material flow and ensure a deagglomeration of the material flow when it enters the static classifier 20 and / or the dynamic classifier 22.
- Fig. 3 shows a sectional view of the distributor device 54 according to a further exemplary embodiment, the structure of the distributor device 54 being essentially building the referring to Fig. 2
- the distributor device 52 described corresponds to the difference that the guide elements 60 are plate-shaped and extend from the first disk 56 to the second disk 58 and through it.
- the Leitelemete 60 off Fig. 3 thus provide in addition to those related to Fig. 2 described advantages of the guide elements 44 for a simple connection of the first disk 56 to the second disk 58.
Description
Die Erfindung betrifft eine Sichteinrichtung zum Sichten eines körnigen Materialstroms.The invention relates to a viewing device for viewing a granular material flow.
Es ist bekannt, körniges Material, wie beispielsweise Zement, zementhaltige Stoffe, Schlacke, Kalkstein oder auch Erze mittels eines Sichters in eine grobe und eine feine Kornfraktion zu unterteilen. Üblicherweise werden solche Sichter einer Materialzerkleinerungsvorrichtung, wie beispielsweise einer Walzenmühle, nach geschaltet, wobei das aus dem Sichter austretende grobe Material der Materialzerkleinerungsvorrichtung erneut zugeführt wird. Bekannte Sichter sind beispielsweise statische Sichter, in denen eine grobe Materialsichtung über Prall- und Leitvorrichtungen erfolgt, und dynamische Sichter, in den eine feine Materialsichtung beispielsweise über einen rotierenden Stabkorb erfolgt. Aus der
Aus der
Bei der Materialzerkleinerung und insbesondere in der Zementherstellung sind häufig mehrere Mahlvorgänge mit unterschiedlichen Zerkleinerungsvorrichtungen zum Erreichen der gewünschten Korngröße notwendig. Jeder dieser Zerkleinerungsvorrichtungen ist üblicherweise eine Sichteinrichtung nachgeschaltet.In the comminution of materials and in particular in cement production, several grinding processes with different comminution devices are often necessary to achieve the desired grain size. Each of these comminution devices is usually followed by a viewing device.
Davon ausgehend ist es Aufgabe der vorliegenden Erfindung, eine Sichteinrichtung mit einer kompakten Bauweise bereitzustellen, die ein effiziente Materialsichtung und eine Reduktion der Komponenten einer Mahlanlage ermöglicht.On this basis, it is the object of the present invention to provide a viewing device with a compact design which enables efficient material viewing and a reduction in the number of components in a grinding plant.
Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung mit den Merkmalen des unabhängigen Vorrichtungsanspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen.According to the invention, this object is achieved by a device having the features of the independent device claim 1. Advantageous developments result from the dependent claims.
Eine Sichteinrichtung zum Sichten eines körnigen Materialstroms umfasst nach einem ersten Aspekt der Erfindung einen ersten Einlass zum Einlassen eines ersten Materialstroms in die Sichteinrichtung und einen zweiten Einlass zum Einlassen eines zweiten Materialstroms in die Sichteinrichtung. Ferner umfasst die Sichteinrichtung einen statischen Sichter und einen dynamischen Sichter, wobei der statische Sichter derart angeordnet ist, dass er den dynamischen Sichter zumindest teilweise umschließt. Die Sichteinrichtung weist des Weiteren eine Verteilereinrichtung auf, die derart ausgebildet ist, dass sie den Materialstrom des ersten Einlasses dem statischen Sichter zuführt und den Materialstrom des zweiten Einlasses dem dynamischen Sichter zuführt.According to a first aspect of the invention, a sighting device for sighting a granular material flow comprises a first inlet for admitting a first material flow into the sighting device and a second inlet for admitting a second material flow into the sighting device. Furthermore, the viewing device comprises a static sifter and a dynamic sifter, the static sifter being arranged in such a way that it at least partially encloses the dynamic sifter. The classifier furthermore has a distributor device which is designed such that it feeds the material flow from the first inlet to the static classifier and feeds the material flow from the second inlet to the dynamic classifier.
Eine solche Verteilereinrichtung bietet den Vorteil, dass der Sichteinrichtung zumindest zwei Materialströme unterschiedlicher Korngrößen zugeführt werden können, wobei der durch den ersten Einlass eintretende Materialstrom den statischen Sichter und den dynamischen Sichter durchströmt und der durch den zweiten Einlass in die Sichteinrichtung eintretende Materialstrom ausschließlich den dynamischen Sichter durchströmt. Die Sichteinrichtung weist vorzugsweise einen oder eine Mehrzahl von ersten und zweiten Einlässen auf, über welche das zu sichtende Material in die Sichteinrichtung eintritt.Such a distributor device offers the advantage that at least two material flows of different grain sizes can be fed to the classifier, the material flow entering through the first inlet flowing through the static classifier and the dynamic classifier and the material flow entering the classifying device through the second inlet exclusively through the dynamic classifier flows through. The viewing device preferably has one or a plurality of first and second inlets through which the material to be viewed enters the viewing device.
Bei dem durch den ersten Einlass eintretenden Materialstrom handelt es sich beispielsweise um ein relativ zu dem durch den zweiten Einlass in die Sichteinrichtung eintretenden Materialstrom grobkörniges Material. Dieses grobkörnige Material kann beispielsweise aus einer Walzenmühle oder einer Gutbettwalzenmühle stammen. Bei dem durch den zweiten Einlass in die Sichteinrichtung eintretenden Materialstrom kann es sich beispielsweise um ein mittels einer Kugelmühle zerkleinertes Material handeln.The material flow entering through the first inlet is, for example, a coarse-grained material relative to the material flow entering the classifying device through the second inlet. This coarse-grained material can come from a roller mill or a material bed roller mill, for example. The material flow entering the classifying device through the second inlet can, for example, be a material comminuted by means of a ball mill.
Die beschriebene Sichteinrichtung ermöglicht zum Einen einen Verzicht auf eine zusätzliche Sichteinrichtung für jeden der Materialströme und ermöglicht zum Anderen ein Sichten beider Materialströme mittels einer einzigen Sichteinrichtung. Bei dem körnigen Materialstrom kann es sich insbesondere um Zementrohmaterial, Zement, zementhaltige Stoffe, Kalkstein, Schlacke oder Erze handeln.On the one hand, the described viewing device makes it possible to dispense with an additional viewing device for each of the material flows and, on the other hand, enables both material flows to be viewed by means of a single viewing device. The granular material flow can in particular be cement raw material, cement, cement-containing substances, limestone, slag or ores.
Der durch den ersten Einlass in die Sichteinrichtung eintretende Materialstrom wird über die Verteilereinrichtung dem statischen Sichter zugeführt. Ein statischer Sichter umfasst eine Mehrzahl von Strömungseinrichtungen, beispielsweise Leitschaufeln, die zur Desagglomeration des durch den statischen Sichter strömenden Materialstroms dienen. Der statische Sichter ist insbesondere derart ausgebildet, dass er eine zylinderringförmige Sichtzone zwischen den Strömungseinrichtungen ausbildet und der dynamische Sichter innerhalb des statischen Sichters angeordnet ist. Dem statischen Sichter wird über einen Sichtluftkanal, beispielsweise mittels eines Gebläses, Sichtluft zugeführt, die über die Mehrzahl von Leitschaufeln der Strömungseinrichtung gegen den durch den statischen Sichter strömenden Materialstrom geleitet wird.The material flow entering the classifier through the first inlet is fed to the static classifier via the distributor device. A static sifter comprises a plurality of flow devices, for example guide vanes, which serve to deagglomerate the material flow flowing through the static sifter. The static sifter is designed in particular in such a way that it forms a cylinder-ring-shaped sifting zone between the flow devices and the dynamic sifter is arranged within the static sifter. The static sifter is fed via a sifting air duct, for example by means of a fan, sifting air, which is guided via the plurality of guide vanes of the flow device against the material flow flowing through the static sifter.
Die gröbere Kornfraktion des durch den ersten Einlass in die Sichteinrichtung einströmenden Materialstroms verlässt den statischen Sichter durch einen ersten Auslass, wobei die feinere Kornfraktion des Materialstroms durch die Sichtluft dem dynamischen Sichter zugeleitet wird.The coarser grain fraction of the material stream flowing into the classifier through the first inlet leaves the static classifier through a first outlet, the finer grain fraction of the material stream being conveyed to the dynamic classifier through the classifier air.
Ein dynamischer Sichter umfasst eine bewegte Sichtzone, beispielsweise einen rotierbaren Stabkorb, in den ein Materialstrom mit geringer Korngröße, insbesondere bis etwa 10 mm eintritt. Der dynamische Sichter ist beispielsweise koaxial zu dem statischen Sichter angeordnet und rotationssymmetrisch zu der Antriebsachse der bewegten Sichtzone. Der Materialstrom mittlerer Korngröße wird durch den dynamischen Sichter abgewiesen und tritt aus einem zweiten Auslass aus der Sichteinrichtung aus. Der Materialstrom, der den dynamischen Sichter passiert, weist eine Korngröße bis etwa 300µm auf und tritt aus einem dritten Auslass aus der Sichteinrichtung aus.A dynamic sifter comprises a moving viewing zone, for example a rotatable rod basket, into which a material flow with a small grain size, in particular up to about 10 mm, enters. The dynamic sifter is arranged, for example, coaxially to the static sifter and rotationally symmetrical to the drive axis of the moving viewing zone. The material flow of medium grain size is rejected by the dynamic classifier and exits the classifier through a second outlet. The material flow that passes through the dynamic classifier has a grain size of up to about 300 µm and emerges from the classifier through a third outlet.
Der durch den zweiten Einlass in die Sichteinrichtung eintretende Materialstrom wird über die Verteilereinrichtung dem dynamischen Sichter zugeführt, wobei das von dem dynamischen Sichter abgewiesene Material die Sichteinrichtung durch den zweiten Auslass verlässt und das in die bewegte Sichtzone des dynamischen Sichters gelangte Material durch den dritten Auslass aus der Sichteinrichtung austritt. Die erfindungsgemäße Sichteinrichtung ermöglicht eine Aufteilung von zwei Materialströmen unterschiedlicher Korngrößen in drei Kornfraktionen. Die grobe, in dem statischen Sichter gesichtete Kornfraktion kann einer ersten Zerkleinerungsvorrichtung, wie beispielsweise einer Walzenmühle, zugeführt werden, wobei die mittlere, in dem dynamischen Sichter gesichtete Kornfraktion einer zweiten Zerkleinerungsvorrichtung, wie beispielsweis einer Kugelmühle, zugeführt werden kann. Auf diese Weise wird eine besonders kompakte Bauweise einer Sichteinrichtung mit einem statischen und einem dynamischen Sichter erreicht.The material flow entering the classifier through the second inlet is fed to the dynamic classifier via the distributor device, the material rejected by the dynamic classifier leaving the classifying device through the second outlet and the material that has entered the moving classifying zone of the dynamic classifier exiting the third outlet exits the viewing device. The viewing device according to the invention enables two material flows of different grain sizes to be divided into three grain fractions. The coarse grain fraction sifted in the static sifter can be fed to a first comminution device, such as a roller mill, while the middle grain fraction sifted in the dynamic sifter can be fed to a second comminution device, such as a ball mill. In this way, a particularly compact design of a classifier with a static and a dynamic classifier is achieved.
Die Korngrößen des durch den ersten Einlass in die Sichteinrichtung eintretenden groben Materialstroms betragen bis etwa 100mm. Die Korngrößen des durch den zweiten Einlass in die Sichteinrichtung eintretenden feinen Materialstroms betragen bis etwa 10mm.The grain sizes of the coarse material flow entering the classifier through the first inlet are up to about 100 mm. The grain sizes of the fine material flow entering the classifier through the second inlet are up to about 10 mm.
Gemäß einer ersten Ausführungsform weist die Verteilereinrichtung zumindest eine rotierbare Scheibe auf. Die zumindest eine rotierbare Scheibe ist beispielsweise mit einer Antriebswelle verbunden und wird zur Rotation angetrieben. Bei der Antriebswelle kann es sich beispielsweise um die Antriebsachse der bewegbaren Sichtzone des dynamischen Sichters handeln. Das Auftreffen des in die Sichteinrichtung eintretenden Materialstroms auf eine rotierende Scheibe sorgt für eine Desagglomeration des körnigen Materials. Des Weiteren wird das Material durch die Rotation der Scheibe radial nach außen bewegt und somit gleichmäßig über die Sichtzone des statischen Sichters und / oder des dynamischen Sichter verteilt.According to a first embodiment, the distributor device has at least one rotatable disk. The at least one rotatable disk is connected, for example, to a drive shaft and is driven to rotate. The drive shaft can be, for example, the drive axis of the movable viewing zone of the dynamic sifter. The impact of the material flow entering the classifying device on a rotating disk ensures a deagglomeration of the granular material. Furthermore, the rotation of the disc moves the material radially outwards and thus distributes it evenly over the viewing zone of the static sifter and / or the dynamic sifter.
Die zumindest eine rotierbare Scheibe ist beispielsweise zum Zuführen des Materialstroms des ersten Einlasses zu dem statischen Sichter oder zum Zuführen des Materialstroms des zweiten Einlasses zu dem dynamischen Sichter angeordnet.The at least one rotatable disk is arranged, for example, to feed the material flow from the first inlet to the static classifier or to feed the material flow from the second inlet to the dynamic classifier.
In einer weiteren Ausführungsform weist die Verteilereinrichtung zumindest einen Bereich auf, der mit dem Gehäuse der Sichteinrichtung verbunden ist. Der mit dem Gehäuse verbundene Bereich der Verteilereinrichtung ist vorzugsweise nicht rotierbar und zum Zuführen des Materialstroms des ersten Einlasses zu dem statischen Sichter oder zum Zuführen des Materialstroms des zweiten Einlasses zu dem dynamischen Sichter angeordnet.In a further embodiment, the distributor device has at least one area which is connected to the housing of the viewing device. The area of the distributor device connected to the housing is preferably non-rotatable and is arranged to feed the material flow from the first inlet to the static classifier or to feed the material flow from the second inlet to the dynamic classifier.
Gemäß einer weiteren Ausführungsform weist die Verteilereinrichtung eine erste rotierbare Scheibe zum Zuführen des Materialstroms des ersten Einlasses zu dem statischen Sichter und eine zweite rotierbare Scheibe zum Zuführen des Materialstroms des zweiten Einlasses zu dem dynamischen Sichter auf. Dadurch wird eine Desagglomeration des ersten und des zweiten Materialstroms sichergestellt bevor diese dem statischen bzw. dem dynamischen Sichter zugeleitet werden.According to a further embodiment, the distributor device has a first rotatable disk for feeding the material flow from the first inlet to the static classifier and a second rotatable disk for feeding the material flow from the second inlet to the dynamic classifier. This ensures a deagglomeration of the first and the second material stream before they are fed to the static or dynamic classifier.
Gemäß einer weiteren Ausführungsform ist die zumindest eine rotierbare Scheibe mit einer Antriebswelle verbunden. Die zumindest eine rotierbare Scheibe ist beispielsweise rotationssymmetrisch um die Antriebswelle angeordnet, wobei es sich bei der Antriebswelle beispielsweise um die Antriebswelle der bewegbaren Sichtzone des dynamischen Sichters handelt. Die Nutzung einer solchen Antriebswelle zum Antrieb zumindest einer rotierbaren Scheibe der Verteilereinrichtung ermöglicht eine besonders platzsparende, kompakte Bauweise der Sichteinrichtung.According to a further embodiment, the at least one rotatable disk is connected to a drive shaft. The at least one rotatable disk is arranged, for example, rotationally symmetrically around the drive shaft, the drive shaft being, for example, the drive shaft of the movable viewing zone of the dynamic classifier. The use of such a drive shaft to drive at least one rotatable disk of the distributor device enables a particularly space-saving, compact design of the viewing device.
Gemäß einer weiteren Ausführungsform ist zumindest eine der ersten Scheibe und der zweiten Scheibe eine kreisringförmige Scheibe. Die andere der ersten und der zweiten Scheibe ist beispielsweise als Kreisscheibe ausgebildet. Eine kreisringförmige Ausbildung einer der Scheiben ermöglicht eine parallele Anordnung der Scheiben, wobei beispielsweise die erste Scheibe zum Zuführen des Materialstroms zu dem statischen Sichter oberhalb der zweiten Scheibe angeordnet ist, sodass der durch den ersten Einlass eintretende Materialstrom durch die zweite, obere Scheibe hindurch auf die erste Scheibe fällt. Dies ermöglicht eine besonders kompakte Bauweise der Verteilereinrichtung. Des Weiteren ist es dadurch möglich, die Einlässe besonders platzsparen, beispielsweise konzentrisch auszubilden und gleichzeitig eine zuverlässige Aufteilung der Materialströme auf den statischen und den dynamischen Sichter zu erzielen.According to a further embodiment, at least one of the first disk and the second disk is an annular disk. The other of the first and second disks is designed as a circular disk, for example. A circular configuration of one of the disks enables the disks to be arranged in parallel, with, for example, the first disk for feeding the material flow to the static classifier being arranged above the second disk so that the material flow entering through the first inlet through the second, upper disk onto the first slice falls. This enables a particularly compact design of the distribution device. Furthermore, it is thereby possible to save particularly space, for example to make the inlets concentric, and at the same time to achieve a reliable distribution of the material flows between the static and the dynamic separator.
Die erste Scheibe und die zweite Scheibe sind nach einer weiteren Ausführungsform über Verbindungsmittel miteinander verbunden. Eine Verbindung der ersten und der zweiten Scheibe realisiert einen einfachen Antrieb beider Scheiben über eine Antriebswelle.According to a further embodiment, the first disk and the second disk are connected to one another via connecting means. A connection of the first and the second disk realizes a simple drive of both disks via a drive shaft.
Gemäß einer weiteren Ausführungsform weist zumindest eine der ersten Scheibe und der zweiten Scheibe der Verteilereinrichtung eine Mehrzahl von Leitelementen auf der Oberfläche der Scheibe auf. Solche Leitelemente sorgen für eine Desagglomeration des Materials beim Auftreffen auf die Oberfläche der Scheiben und des Weiteren für eine zuverlässige Leitung des Materials hin zu dem statischen bzw. dem dynamischen Sichter. Ferner sind auf der Oberfläche zumindest einer der ersten oder zweiten Scheibe vorzugsweise Mittel zur Desagglomeration des Materials angeordnet, die beispielsweise eine rauhe, körnige Oberflächenstruktur der Scheiben bewirken.According to a further embodiment, at least one of the first disk and the second disk of the distributor device has a plurality of guide elements on the surface of the disc. Such guide elements ensure a deagglomeration of the material when it hits the surface of the panes and also ensure reliable guidance of the material to the static or dynamic classifier. Furthermore, means for deagglomeration of the material are preferably arranged on the surface of at least one of the first or second panes, which means, for example, bring about a rough, granular surface structure of the panes.
Die Leitelemente sind gemäß einer weiteren Ausführungsform stabförmig ausgebildet und erstrecken sich radial nach außen.According to a further embodiment, the guide elements are rod-shaped and extend radially outward.
Nach einer weiteren Ausführungsform umfassen die Leitelemente die Verbindungsmittel zwischen der ersten Scheibe und der zweiten Scheibe.According to a further embodiment, the guide elements comprise the connecting means between the first disk and the second disk.
Zur Verbindung der ersten und der zweiten Scheibe sind die Leitelemente gemäß einer weiteren Ausführungsform plattenförmig ausgebildet und beispielsweise orthogonal zu den Scheiben angeordnet. Dies ermöglicht eine einfache Verbindung der ersten und der zweiten Scheibe bei gleichzeitiger Nutzung der Verbindungsmittel als Leitelemente zum Leiten des Materialstroms.To connect the first and second panes, the guide elements are, according to a further embodiment, plate-shaped and are arranged, for example, orthogonally to the panes. This enables a simple connection of the first and the second disk with simultaneous use of the connection means as guide elements for guiding the flow of material.
Eine Mahlanlage zur Zerkleinerung von Mahlgut, umfasst zumindest eine Mahlvorrichtung und eine mit der zumindest einen Mahlvorrichtung in Verbindung stehenden Sichteinrichtung zum Sichten des Mahlguts, wie vorangehend beschrieben.A grinding plant for comminuting ground material comprises at least one grinding device and a viewing device, which is connected to the at least one grinding device, for classifying the ground material, as described above.
Die zumindest eine Mahlvorrichtung umfasst beispielsweise eine Walzenmühle oder eine Kugelmühle, wobei der erste Auslass und der zweite Auslass der Sichteinrichtung mit einem Einlass der Mahlvorrichtung in Verbindung steht. Der Auslass der Mahlvorrichtung ist vorzugsweise mit dem zweiten Einlass der Sichterieinrichtung verbunden.The at least one grinding device comprises, for example, a roller mill or a ball mill, the first outlet and the second outlet of the classifying device being connected to an inlet of the grinding device. The outlet of the grinding device is preferably connected to the second inlet of the classifier device.
Vorzugsweise weist die Mahlanlage eine Walzenmühle und eine Kugelmühle auf, wobei die Walzenmühle mit dem ersten Einlass der Sichteinrichtung in Verbindung steht und der zweite Auslass der Sichteinrichtung mit der Kugelmühle in Verbindung steht. In die Mahlanlage aufgegebenes Frischgut wird in den ersten Einlass der Sichteinrichtung geführt. Das aus dem ersten Auslass der Sichteinrichtung austretende grobe Mahlgut wird der Walzenmühle zugeführt, wobei das aus dem zweiten Auslass der Sichteinrichtung austretende Grießegut mittlerer Korngröße der Kugelmühle zugeführt wird. Das aus dem dritten Auslass der Sichteinrichtung austretende feine Fertiggut wird beispielsweise über einen Abscheider, in dem das Luft-Mahlgutgemisch in Mahlgut und Luft getrennt wird, aus der Mahlanlage geführt.The grinding plant preferably has a roller mill and a ball mill, the roller mill being connected to the first inlet of the classifying device and the second outlet of the classifying device being connected to the ball mill. Fresh material fed into the grinding system is fed into the first inlet of the classifier. That from the first outlet of the viewing device Any coarse ground material that emerges is fed to the roller mill, with the medium-grain size semolina that emerges from the second outlet of the classifier being fed to the ball mill. The fine finished product emerging from the third outlet of the classifier is guided out of the grinding system, for example, via a separator in which the air / grist mixture is separated into grist and air.
Eine voran beschriebene Mahlanlage mit einer Sichteinrichtung der voran beschriebenen Art weist eine geringe Anzahl an Komponenten, wie beispielsweise Leitungen zwischen einer Mehrzahl von Sichteinrichtungen und einer Mehrzahl von Mahleinrichtungen auf. Das Sichten der Mahlgutströme einer oder mehrerer Mahlvorrichtungen wird mit einer Sichteinrichtung realisiert, die den Mahlgutstrom in drei unterschiedliche Korngrößen aufteilt und somit eine Zufuhr von Mahlgut mit optimaler Korngröße zu einer entsprechenden Mahlvorrichtung ermöglicht. Somit wird ein effizienter und kostengünstiger Mahlvorgang erreicht. Weiterhin wird durch die reduzierte Anzahl an Komponenten die Wartungsintensität der Mahlanlage verringert.A grinding plant described above with a viewing device of the type described above has a small number of components, such as, for example, lines between a plurality of viewing devices and a plurality of grinding devices. The sifting of the grist streams of one or more grinding devices is realized with a viewing device which divides the grist stream into three different grain sizes and thus enables a supply of grist with optimal grain size to a corresponding grinding device. An efficient and cost-effective grinding process is thus achieved. Furthermore, the reduced number of components reduces the maintenance intensity of the grinding system.
Die Erfindung ist nachfolgend anhand mehrerer Ausführungsbeispiele mit Bezug auf die beiliegenden Figuren näher erläutert.
- Fig. 1
- zeigt eine schematische Schnittdarstellung einer Sichteinrichtung mit einer Verteilereinrichtung gemäß einem Ausführungsbeispiel.
- Fig. 2
- zeigt eine schematische Darstellung einer Draufsicht auf eine Verteilereinrichtung gemäß einem weiteren Ausführungsbeispiel.
- Fig. 3
- zeigt eine schematische Schnittdarstellung einer Verteilereinrichtung gemäß einem weiteren Ausführungsbeispiel.
- Fig. 1
- shows a schematic sectional illustration of a viewing device with a distribution device according to an embodiment.
- Fig. 2
- shows a schematic representation of a plan view of a distribution device according to a further embodiment.
- Fig. 3
- shows a schematic sectional illustration of a distributor device according to a further exemplary embodiment.
Innerhalb der statischen Sichters 20 ist radial einwärts der zweiten Strömungseinrichtung 26 der dynamische Sichter 22 angeordnet. Der dynamische Sichter 22 umfasst einen Stabkorb 23 mit in axialer Richtung verlaufenden Stäben. Der Stabkorb 23 wird über eine am oberen Ende des Stabkorbes angebrachte Antriebswelle 28 rotierend angetrieben. Der dynamische Sichter 22 ist in dem Ausführungsbeispiel in
Am oberen Ende des Stabkorbes 23 ist eine Verteilereinrichtung 42 angeordnet, die eine erste Scheibe 38 und eine parallele zweite Scheibe 40 aufweist. Die zweite Scheibe 40 weist den gleichen Durchmesser wie der Stabkorb 23 auf, ist fest mit diesem verbunden und bildet einen Deckel des zylinderförmigen Stabkorbs 23. Die erste Scheibe 38 ist parallel zu der zweiten Scheibe 40 oberhalb dieser angeordnet und ist ringförmig, mit einer Aussparung in der Mitte ausgebildet. Zwischen der ersten Scheibe 38 und der zweiten Scheibe 40 ist ein Durchgang ausgebildet. Die erste Scheibe 38 und die zweite Scheibe 40 sind auf in
Um den statischen Sichter 20 ist ein Sichtluftkanal 36 angeordnet. Der Sichtluftkanal 36 ist in dem in
Im Betrieb der Sichteinrichtung 10 strömt ein grober Materialstrom in Pfeilrichtung 16 durch den ersten Einlass 14 auf die erste Scheibe 38, die über die Antriebsachse 28 rotierend angetrieben wird. Durch die Rotation der ersten Scheibe 38 wird das Material auf der Scheibe 38 radial nach außen bewegt und gelangt von oben in den statischen Sichter 20 in die statische Sichtzone 27. Das Aufprallen des Materialstroms auf die Scheibe 38 und die Rotation der Scheibe 38 sorgen zusätzlich für eine Desagglomeration des Materials.When the
Von der äußeren Wand 29 des statischen Sichters 20 tritt Sichtluft in den statischen Sichter 20 ein und strömt durch die äußere Strömungseinrichtung 25 gegen den die statische Sichtzone 27 durchströmenden Materialstrom. In der statischen Sichtzone 27 wird der Materialstrom durch die eintretende Sichtluft radial nach innen hin zu der inneren Strömungseinrichtung 26 abgelenkt. Das grobe Material durchströmt die statische Sichtstufe 27 und fällt nach unten hin zu dem ersten Auslass 30. Das feinere Material wird von der Sichtluft durch die innere Strömungseinrichtung 26 in die dynamische Sichtzone 31 geblasen. In der dynamischen Sichtzone 31 fällt das grobe Material nach unten hin zu dem zweiten Auslass 32 und das feinere Material gelangt durch die Stäbe des Stabkorbs 23 in das Innere des Stabkorbs. Das feinere Material im inneren des Stabkorbs 23 fällt nach unten hin zu dem dritten Auslass 34.From the
Die Sichteinrichtung 10 weist drei Auslässe 30, 32, 34 für drei verschiedene Kornfraktionen des Materialstroms auf. Der durch den ersten Einlass 14 in die Sichteinrichtung 10 einströmende Materialstrom wird in drei verschiedene Kornfraktionen gesichtet, die durch drei verschiedene Auslässe 30, 32, 34 die Sichteinrichtung 10 verlassen.The
Der durch den zweiten Einlass 12 in die Sichteinrichtung 10 eintretende Materialstrom durchläuft die Sichteinrichtung in Pfeilrichtung 18 und strömt zunächst auf die zweite Scheibe 40, die durch die Antriebsachse zur Rotation angetrieben wird. Das Material wird durch die Rotation der Scheibe 40 radial nach außen bewegt und tritt in die sich an die zweite Scheibe 40 anschließende dynamische Sichtzone 31 in den dynamischen Sichter 22 ein. Wie bereits mit Bezug auf den durch den ersten Einlass 14 in die Sichteinrichtung 10 einströmenden Materialstrom beschrieben, fällt das gröbere Material durch die dynamische Sichtzone nach unten hin zu dem zweiten Auslass 32. Es ist denkbar, das durch den Auslass 30 austretende Material und das durch den Auslass 32 austretende Material anschließend zumindest teilweise zu vereinen und einer Mahleinrichtung zuzuführen.The material flow entering the separating
Das feinere Material tritt in den Stabkorb 23 ein und wird nach unten zusammen mit der Sichtluft in Richtung des dritten Auslasses 34 ausgetragen. Es ist ebenfalls denkbar, das den Stabkorb 23 passierte Material nach oberhalb des dynamischen Sichters 22 aus der Sichteinrichtung 10 austreten zu lassen, wobei der Auslass 34, auf in
Das durch den zweiten Einlass 12 in die Sichteinrichtung eintretende Material wird in zwei Korngrößen gesichtet, wobei das feinere Material durch den dritten Auslass 34 und das gröbere Material durch den zweiten Auslass 32 aus der Sichteinrichtung ausgelassen wird.The material entering the classifier through the
Die Sichteinrichtung 10 ermöglicht eine Aufgabe von zwei Materialströmen unterschiedlicher Korngröße in die Sichteinrichtung, wobei der erste Materialstrom sowohl dem statischen Sichter 20 also auch dem dynamischen Sichter 22 zugeführt wird und der zweite Materialstrom ausschließlich dem dynamischen Sichter 22 zugeführt wird. Dies ermöglicht einen Einlass eines groben Materialstroms aus beispielsweise einer Walzenmühle durch den ersten Einlass 14 und einen Einlass eines feineren Materialstroms aus beispielsweise einer Kugelmühle durch den zweiten Einlass 12 in die Sichteinrichtung 10.The
Die beschriebene Sichteinrichtung 10 ermöglicht eine erhebliche Platzersparnis, da eine Sichteinrichtung für zwei Materialströme verwendet wird und auf einen zusätzlichen Sichter verzichtet werden kann.The described
Die auf den Scheiben 48, 50 angebrachten Leitelemente 44 sorgen im Betreib der Sichteinrichtung 10 dafür, dass der Materialstrom radial nach außen geleitet wird. Zusätzlich bieten die Leitelemente 44 eine Aufprallfläche für den Materialstrom und sorgen für eine Desagglomeration des Materialstroms beim Eintreten in den statischen Sichter 20 und / oder den dynamischen Sichter 22.The
- 1010
- SichteinrichtungViewing device
- 1212th
- zweiter Einlasssecond inlet
- 1414th
- erster Einlassfirst admission
- 1616
- MaterialstromMaterial flow
- 1818th
- MaterialstromMaterial flow
- 2020th
- statischer Sichterstatic sifter
- 2222nd
- dynamischer Sichterdynamic sifter
- 2323
- StabkorbRod basket
- 2525th
- äußere statische Strömungseinrichtungexternal static flow device
- 2626th
- innere statische Strömungseinrichtunginternal static flow device
- 2727
- statische Sichtzonestatic viewing zone
- 2828
- Antriebswelledrive shaft
- 2929
- äußere Wandouter wall
- 3030th
- erster Auslassfirst outlet
- 3131
- dynamische Sichtzonedynamic viewing zone
- 3232
- zweiter Auslasssecond outlet
- 3434
- dritter Auslassthird outlet
- 3636
- SichtluftkanalAir duct
- 3838
- erste Scheibefirst slice
- 4040
- zweite Scheibesecond disc
- 4242
- VerteilereinrichtungDistribution device
- 4444
- LeitelementGuiding element
- 4646
- Antriebswelledrive shaft
- 4848
- erste Scheibefirst slice
- 5050
- zweite Scheibesecond disc
- 5252
- VerteilereinrichtungDistribution device
- 5454
- VerteilereinrichtungDistribution device
- 5656
- erste Scheibefirst slice
- 5858
- zweite Scheibesecond disc
- 6060
- LeitelementeGuiding elements
Claims (12)
- Classifying device (10) for classifying a granular material flow, comprising
a first inlet (14) for letting a first material flow into the classifying device (10),
a second inlet (12) for letting a second material flow into the classifying device (10),
a static classifier (20), and
a dynamic classifier (22), wherein the static classifier (20) is arranged in such a manner that it at least partially surrounds the dynamic classifier (22),
characterized in that
the classifying device (10) comprises a distributing device (42; 52; 54) which is designed in such a manner that it supplies the material flow of the first inlet (14) to the static classifier (20) and the material flow of the second inlet (12) to the dynamic classifier (22). - Classifying device (10) according to Claim 1, wherein the distributing device (42; 52; 54) comprises at least one rotatable disk (38, 40; 48, 50; 56; 58).
- Classifying device (10) according to either of the preceding claims, wherein the distributing device (42; 52; 54) comprises at least one region which is connected to a housing of the classifying device (10) .
- Classifying device (10) according to one of the preceding claims, wherein the distributing device (42; 52; 54) comprises a first rotatable disk (38; 48; 56) for supplying the material flow of the first inlet (14) to the static classifier (20) and a second rotatable disk (40; 50; 58) for supplying the material flow of the second inlet (12) to the dynamic classifier (22).
- Classifying device (10) according to Claim 2, wherein the at least one rotatable disk (38, 40; 48, 50; 56; 58) is connected to a driveshaft (28; 46).
- Classifying device (10) according to either of Claims 4 and 5, wherein at least one out of the first disk (38; 48; 56) and the second disk (40; 50; 58) is a circular ring-shaped disk.
- Classifying device (10) according to one of Claims 4 to 6, wherein the first disk (38; 48; 56) and the second disk (40; 50; 58) are connected to each other via connecting means.
- Classifying device (10) according to one of Claims 4 to 7, wherein at least one out of the first disk (38; 48; 56) and the second disk (40; 50; 58) of the distributing device (42; 52; 54) comprises a plurality of guiding elements (44; 60) on the surface.
- Classifying device (10) according to Claim 8, wherein the guiding elements (44) are of rod-shaped design and extend radially outward.
- Classifying device (10) according to either of Claims 8 and 9, wherein the guiding elements (44; 60) comprise the connecting means between the first disk (38; 48; 56) and the second disk (40; 50; 58).
- Classifying device (10) according to Claim 8, wherein the guiding elements (60) are of plate-like design.
- Grinding plant for comminuting granular material, comprising
at least one grinding apparatus, and a classifying device (10) according to one of the preceding claims which is connected to the at least one grinding apparatus.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014015550.1A DE102014015550A1 (en) | 2014-10-22 | 2014-10-22 | Sight device for sifting a granular material flow |
PCT/EP2015/073565 WO2016062571A1 (en) | 2014-10-22 | 2015-10-12 | Classifying device for classifying a granular material flow |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3209435A1 EP3209435A1 (en) | 2017-08-30 |
EP3209435B1 true EP3209435B1 (en) | 2021-08-25 |
Family
ID=54324956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15780822.1A Active EP3209435B1 (en) | 2014-10-22 | 2015-10-12 | Classifying device for classifying a granular material flow |
Country Status (6)
Country | Link |
---|---|
US (1) | US10632503B2 (en) |
EP (1) | EP3209435B1 (en) |
CN (1) | CN107107119B (en) |
DE (1) | DE102014015550A1 (en) |
DK (1) | DK3209435T3 (en) |
WO (1) | WO2016062571A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106563643B (en) * | 2016-08-09 | 2019-05-24 | 马鞍山市博望区久保机械配件加工厂 | A kind of selection by winnowing part and its wind selection method |
CN108956216B (en) * | 2018-08-29 | 2020-11-17 | 嘉兴嘉卫检测科技有限公司 | Air particulate matter grading sampling device for environmental monitoring |
DE102019123034B3 (en) * | 2019-08-28 | 2020-12-03 | Khd Humboldt Wedag Gmbh | Cyclone with rotating rod basket |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1607536C3 (en) | 1968-02-24 | 1974-01-17 | Loesche Hartzerkleinerungs- Und Zementmaschinen Kg, 4000 Duesseldorf | Airflow separator |
DE102004027128A1 (en) | 2004-06-03 | 2005-12-22 | Polysius Ag | Sieve assembly, to sort granular materials into at least three fractions for a mill, has a concentric array of a static and a dynamic sieve around a common axis in a common housing |
DE102006039775A1 (en) * | 2006-08-24 | 2008-02-28 | Khd Humboldt Wedag Gmbh | Sighting device for sifting granular material and Kreislaufmahlanlage with involvement of such a viewing device |
US7854406B2 (en) * | 2008-01-10 | 2010-12-21 | Koppern Equipment, Inc. | Air separator for comminuted materials |
CN102319673B (en) * | 2011-02-22 | 2014-01-01 | 夏纪勇 | Cylindrical powder concentrator |
DE102011055762B4 (en) * | 2011-11-28 | 2014-08-28 | Maschinenfabrik Köppern GmbH & Co KG | Device for sifting granular material and grinding plant |
PL2822708T3 (en) * | 2012-03-07 | 2017-10-31 | Electricity Generation And Retail Corp | Method and apparatus for separating particulate matter |
CN102615046A (en) * | 2012-04-10 | 2012-08-01 | 江苏安必信环保设备有限公司 | Novel powder selecting machine capable of uniformly scattering material |
DE102013101517A1 (en) * | 2013-02-15 | 2014-08-21 | Thyssenkrupp Resource Technologies Gmbh | Classifier and method for operating a classifier |
CN203556562U (en) * | 2013-11-01 | 2014-04-23 | 南京托普粉磨工程技术有限公司 | Ternary classification powder selecting machine |
-
2014
- 2014-10-22 DE DE102014015550.1A patent/DE102014015550A1/en not_active Ceased
-
2015
- 2015-10-12 DK DK15780822.1T patent/DK3209435T3/en active
- 2015-10-12 WO PCT/EP2015/073565 patent/WO2016062571A1/en active Application Filing
- 2015-10-12 US US15/521,377 patent/US10632503B2/en active Active
- 2015-10-12 EP EP15780822.1A patent/EP3209435B1/en active Active
- 2015-10-12 CN CN201580057881.3A patent/CN107107119B/en active Active
Also Published As
Publication number | Publication date |
---|---|
US10632503B2 (en) | 2020-04-28 |
DK3209435T3 (en) | 2021-11-15 |
CN107107119B (en) | 2020-04-14 |
EP3209435A1 (en) | 2017-08-30 |
WO2016062571A1 (en) | 2016-04-28 |
CN107107119A (en) | 2017-08-29 |
US20170304869A1 (en) | 2017-10-26 |
DE102014015550A1 (en) | 2016-04-28 |
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