EP0887106B1 - Closed-circuit milling device with a high-pressure roller press and separator - Google Patents
Closed-circuit milling device with a high-pressure roller press and separator Download PDFInfo
- Publication number
- EP0887106B1 EP0887106B1 EP98111402A EP98111402A EP0887106B1 EP 0887106 B1 EP0887106 B1 EP 0887106B1 EP 98111402 A EP98111402 A EP 98111402A EP 98111402 A EP98111402 A EP 98111402A EP 0887106 B1 EP0887106 B1 EP 0887106B1
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- EP
- European Patent Office
- Prior art keywords
- sifter
- roller press
- stock
- housing
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
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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
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
Definitions
- the invention relates to a circuit grinding device with a high-pressure roller press for crushing granular good material and with Integrated classifier, both units surrounded by a housing which consists of two fixed side end walls, between which a rotatably mounted, rotatable material conveyor ring is arranged for an internal good material cycle, the good material inlet through one or more openings in one or both side walls of the housing and the Good material outlet also laterally through one or more openings in the front wall of the housing.
- the ring takes the press discharge material (Schülpen material) depending on the design from lifting elements in the conveyor ring to the area of the upper one Apex of the ring and leaves this good material from above fall into the nip, causing the internal good material cycle comes about.
- Bucket elevators or other space-consuming conveying bodies for transporting the press discharge material to the press inlet omitted.
- the compact circuit grinding device of DE-A-196 30 687.6 above the rotatable bar basket lying horizontally on the roller press a dynamic bar sifter arranged, the of Bar basket through which visible air flows from the area of the upper apex the material to be discharged from the material discharge ring recorded and from this separates the coarse grain fraction, the one below Rollers fed for the purpose of further grinding is, while the visual air loaded with the fine material fraction from the The rod basket is withdrawn and outside the circuit grinding device from the visual air is separated.
- the invention has for its object the preamble of Circuit milling device forming claim 1, especially with regard to the overall low specific Energy requirements and problem-free grinding even of moist goods.
- Characteristic of the circuit grinding device according to the invention with roller press and integrated classifier is that the classifier below of the nip of the two rollers in the housing with the rotatably mounted material conveyor ring is arranged. This will first achieved that the sifter of the press discharge material, before it gets onto the rotating material conveyor ring and from this is transported upwards, separates the fine material and this removed from the housing of the circuit grinding device, so that the rotating material conveyor ring already the separated fine part no longer has to be transported.
- a static classifier namely according to another characteristic of Invention a static cascade classifier with at least one row cascade-like or venetian blind-like one above the other arranged baffles, their spaces in cross flow are flowed through by sight air.
- a static cascade sifter also acts as a disagglomerator for those of the Pressed agglomerates (slugs). The deagglomeration the Schülpen is practically free of charge from the cascade sifter whithin.
- the slugs of the press discharge material may be together with the fresh material fed to the circuit grinding device, such as e.g. Cement clinker blocks placed on top of the cascade sifter, and the mixture of materials moves from above by gravity down over the cascade or blind-like arrangement Baffles and it is circulated, the Schülpenmaterial deagglomerated, which at the same time approximately in cross flow from the Visible air is flowed through, which is able to do both fine material contained in the Schülpenmaterial as well as possibly in the fresh goods from the material moving from top to bottom through the classifier to see out, and only the classifier coarse fraction freed from the fine material, gets onto the rotating material conveyor ring and is taken up by it and reaches the upper one Peak again in the nip of the roller press.
- the circuit grinding device such as e.g. Cement clinker blocks placed on top of the cascade sifter
- the Deagglomeration of the scaly material can be done by grinding media also fresh cascades falling cascading downwards such as. Cement clinker blocks are effectively supported. Your own separately powered disagglomerator such as Impact hammer mill to deagglomerate the press sleeves before entry in the classifier is unnecessary.
- the compact circuit grinding device according to the invention with integrated High pressure roller press and classifier also opens up the possibility the grinding device in contrast to previous high pressure high pressure roller presses with a not too high one Operate pressure to reduce less hard material material to produce with less sharp-edged particles, which the Wear on the roller press itself as well as on the classifier is reduced.
- the pressure is not too high the grinding stock reaches a broader grain distribution curve in the grinding product, what with many products such as is desirable for cement. ever less hard coming from the high pressure roller press Schülpen are, the easier they are then immediately downstream classifiers such as Cascade sifter or rod basket sifter deagglomerate.
- the one with a less high pressure the increasing recycle grinding system circulation rate to be expected of the Schülpen can then by the classifier, especially if the classifier is static Cascade sifter is easily coped with.
- the inside of the rotating material conveyor ring below the Roller press arranged sifters can also be a dynamic one Be a sifter, its rotating dust basket below the press rolls is arranged parallel to these, at least in the area one end of the rod basket in the adjacent housing end wall a discharge elbow for the extraction of the fine goods Visible air is arranged.
- the two are driven in opposite directions and rollers 10 separated from each other by a nip, 11 surrounded or enclosed by a housing, consisting of two fixed, i.e. non-rotating side end walls 12, 13, between which a material conveyor ring rotatably mounted on rollers 14 and 15 16 is arranged for an internal material cycle.
- the Rotation of the material conveyor ring 16 takes place via its cylindrical Coat e.g. by the driven bearing roller 15.
- the bearing blocks of the two rollers 10, 11 in one Machine frame 17, 18 mounted, which is part of the fixed Side end walls 12, 13 can be.
- a static one Cascade classifier arranged with at least one row cascade-like or venetian blind-like one above the other arranged baffles 19, the spaces in the Cross flow of visual air 20 are flowed through from the side through at least one feed housing 21 through at least one of the Side end walls 12, 13 through into the space below the roller press is introduced.
- This cascade sifter, flowed through by visible air acts as a deagglomerator for the roller press sleeves 22, which together with the fresh regrind 23 the cascade sifter be abandoned.
- one of the housing end walls 12, 13 can be introduced fresh material 23 but also via line 23a directly from above the nip of the Roller press 10, 11 fed through a higher side opening become.
- the classifying air 20 sifting through the classifying material Fine material fraction, and the visual air loaded with fine material 24 becomes withdrawn via line 25 from the circuit grinding device, while the coarse grain fraction separated from the classifier by the classifier 26 on the inner track of the rotating one, which may be provided with lifting elements
- Material conveyor ring 16 arrives, the coarse grain fraction 26th takes up to before the top vertex of the ring 16 and this good material 27 in the nip of the roller press 10, 11 drops. That means that the material bed shredding in the high pressure roller press 10, 11 is relieved of the fines 24.
- the wet material could glue the inner wall of the material conveyor ring 16 a hot gas stream is used as viewing air 20, which contains the moist good material effective in its disagglomeration in the cascade sifter can dry, so that the energy-saving circular grinding plant, the due to an extremely low specific energy requirement (kWh / t) is also used for grinding moist goods can be.
- FIG. 2 shows that below the roller press 10, 11 within the rotating material conveyor ring 16 instead of the static cascade sifter 19 or even a dynamic one in addition to this Classifiers with rotatably mounted rod basket 28 can be arranged, e.g. via a speed-adjustable electric motor via a shaft 29 is driven.
- the housing walls 12, 13 of the grinding device are the classifier housing at the same time.
- In the area of the ends of the rod basket 28 are in the adjacent housing end walls 12, 13 discharge elbows 30, 30a for the extraction of the fines 24 loaded Visible air arranged.
- roller presses also roller crushers or roller mills can be used, usually with a lower roller pressure work as roller presses.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Combined Means For Separation Of Solids (AREA)
Description
Die Erfindung betrifft eine Kreislaufmahleinrichtung mit Hochdruck-Walzenpresse zur Druckzerkleinerung körnigen Gutmateriales und mit integriertem Sichter, wobei beide Aggregate von einem Gehäuse umgeben sind, das aus zwei feststehenden Seiten-Stirnwänden besteht, zwischen denen ein drehbar gelagerter in Drehung versetzbarer Materialförderring für einen internen Gutmaterialkreislauf angeordnet ist, wobei der Gutmaterialeinlauf durch eine oder mehrere Öffnungen in einer oder in beiden Gehäuse-Stirnwänden von der Seite und der Gutmaterialauslauf ebenfalls seitlich durch eine oder mehrere Öffnungen in der Gehäuse-Stirnwand erfolgen.The invention relates to a circuit grinding device with a high-pressure roller press for crushing granular good material and with Integrated classifier, both units surrounded by a housing which consists of two fixed side end walls, between which a rotatably mounted, rotatable material conveyor ring is arranged for an internal good material cycle, the good material inlet through one or more openings in one or both side walls of the housing and the Good material outlet also laterally through one or more openings in the front wall of the housing.
Der eingangs zitierte Oberbegriff des Anspruchs 1 dieser Patentanmeldung nimmt Bezug auf die ältere nicht vorveröffentlichte deutsche Patentanmeldung DE-A-196 30 687.6, in der eine sehr kompakte Kreislaufmahleinrichtung mit Zweiwalzenpresse zur Druckzerkleinerung körnigen Gutmateriales und mit integriertem Sichter vorgeschlagen worden ist. Dabei sind die beiden Walzen der Walzenpresse, insbesondere Hochdruck-Gutbettzerkleinerungs-Walzenmühle, von einem Gehäuse umhaust, bestehend aus zwei feststehenden, d.h. nicht rotierenden Seiten-Stirnwänden, zwischen denen ein drehbar gelagerter und durch einen Drehantrieb in Drehung versetzbarer Materialförderring für einen internen Gutmaterialkreislauf angeordnet ist. Dieser drehbar gelagerte Materialförderring der Umhausung rotiert mit z.B. ca. 40 bis 80% der kritischen Drehzahl, d.h. der Ring nimmt das Pressenaustragsgut (Schülpenmaterial) je nach Gestaltung von Hubelementen im Förderring bis in den Bereich etwa des oberen Scheitelpunktes des Ringes mit und läßt dieses Gutmaterial von oben in den Walzenspalt fallen, wodurch der interne Gutmaterialkreislauf zustandekommt. Becherwerke oder andere platzbeanspruchende Förderorgane zum Transport des Pressenaustragsgutes zum Presseneinlauf entfallen. Mit dem rotierenden Gutmaterialförderring wird also auf geringstem Platz und mit geringem maschinellen Aufwand ein mehrfacher interner Materialkreislauf mit mehrmaliger Gutbettbeanspruchung des Gutmaterials erreicht, wobei auch verhältnismäßig hohe Gutkreislauflasten, hervorgerufen z.B. durch reduzierte Walzenpressdrücke mit Rücksicht auf die dadurch erhöhte Standfestigkeit der Walzen, zu bewältigen sind.The preamble of claim 1 of this patent application cited at the beginning makes reference to the older, unpublished German Patent application DE-A-196 30 687.6, in which a very compact Cycle grinding device with two-roller press for pressure reduction granular good material and with integrated classifier proposed has been. The two rollers of the roller press, especially high-pressure material bed crushing roller mill, enclosed by a housing, consisting of two fixed, i.e. non-rotating side end walls, between which a swivel mounted and rotatable by a rotary drive Material conveyor ring arranged for an internal material cycle is. This rotating material conveyor ring of the housing rotates with e.g. approx. 40 to 80% of the critical speed, i.e. the ring takes the press discharge material (Schülpen material) depending on the design from lifting elements in the conveyor ring to the area of the upper one Apex of the ring and leaves this good material from above fall into the nip, causing the internal good material cycle comes about. Bucket elevators or other space-consuming conveying bodies for transporting the press discharge material to the press inlet omitted. With the rotating material feed ring, the smallest space and a multiple with little mechanical effort internal material cycle with repeated material bed stress of the good material achieved, with relatively high Good circulation loads, e.g. caused through reduced roller pressures with regard to the increased stability of the Rollers that have to be mastered.
Zur Erzielung hoher Feinheiten beim Mahlgut ist im Gehäuse der kompakten Kreislaufmahleinrichtung der DE-A-196 30 687.6 oberhalb der Walzenpresse horizontal liegend der drehbar gelagerte Stabkorb eines dynamischen Stabkorbsichters angeordnet, wobei der von Sichtluft durchströmte Stabkorb das vom Bereich des oberen Scheitelpunktes des Materialförderringes abgeworfene Pressenaustragsgut erfaßt und aus diesem die Grobkornfraktion abtrennt, die den darunterliegenden Walzen zum Zwecke der Weitervermahlung zugeführt wird, während die mit der Feingutfraktion beladene Sichtluft aus dem Stabkorb abgezogen und außerhalb der Kreislaufmahleinrichtung von der Sichtluft abgetrennt wird.To achieve high fineness in the regrind, the compact circuit grinding device of DE-A-196 30 687.6 above the rotatable bar basket lying horizontally on the roller press a dynamic bar sifter arranged, the of Bar basket through which visible air flows from the area of the upper apex the material to be discharged from the material discharge ring recorded and from this separates the coarse grain fraction, the one below Rollers fed for the purpose of further grinding is, while the visual air loaded with the fine material fraction from the The rod basket is withdrawn and outside the circuit grinding device from the visual air is separated.
Der Erfindung liegt die Aufgabe zugrunde, die den Oberbegriff des Anspruchs 1 bildende Kreislaufmahleinrichtung weiter auszugestalten, besonders hinsichtlich des insgesamt niedrigen spezifischen Energiebedarfs und der problemfreien Mahlung auch feuchter Güter. The invention has for its object the preamble of Circuit milling device forming claim 1, especially with regard to the overall low specific Energy requirements and problem-free grinding even of moist goods.
Diese Aufgabe wird gemäß der Erfindung mit den Maßnahmen des Kennzeichnungsteils des Anspruchs 1 gelöst. Vorteilhafte weitere Ausgestaltungen sind in den Unteransprüchen angegeben.This object is achieved according to the invention with the measures of Labeling part of claim 1 solved. Advantageous others Refinements are specified in the subclaims.
Charakteristisch für die erfindungsgemäße Kreislaufmahleinrichtung mit Walzenpresse und integriertem Sichter ist, daß der Sichter unterhalb des Walzenspaltes der beiden Walzen im Gehäuse mit dem drehbar gelagerten Materialförderring angeordnet ist. Dadurch wird zunächst einmal erreicht, daß der Sichter vom Pressenaustragsgut, bevor dieses auf den rotierenden Materialförderring gelangt und von diesem nach oben transportiert wird, das Feingut abtrennt und dieses aus dem Gehäuse der Kreislaufmahleinrichtung entfernt, so daß der rotierende Materialförderring den abgetrennten Feingutanteil schon nicht mehr transportieren muß. Dies wirkt sich besonders günstig auf den niedrigen spezifischen Energiebedarf aus, insbesondere wenn der unterhalb der Walzenpresse angeordnete Sichter ein antriebsloser statischer Sichter ist, nämlich nach einem weiteren Merkmal der Erfindung ein statischer Kaskadensichter mit wenigstens einer Reihe schräg nach unten geneigter kaskadenartig bzw. jalousieartig übereinander angeordneter Leitbleche, deren Zwischenräume im Querstrom von Sichtluft durchströmt sind. Ein derartiger statischer Kaskadensichter wirkt gleichzeitig als Desagglomerator für die von der Walzenpresse gepressten Agglomerate (Schülpen). Die Desagglomerierung der Schülpen wird vom Kaskadensichter praktisch gratis miterledigt.Characteristic of the circuit grinding device according to the invention with roller press and integrated classifier is that the classifier below of the nip of the two rollers in the housing with the rotatably mounted material conveyor ring is arranged. This will first achieved that the sifter of the press discharge material, before it gets onto the rotating material conveyor ring and from this is transported upwards, separates the fine material and this removed from the housing of the circuit grinding device, so that the rotating material conveyor ring already the separated fine part no longer has to be transported. This has a particularly favorable effect the low specific energy requirement, especially if the classifier arranged below the roller press is a non-driven is a static classifier, namely according to another characteristic of Invention a static cascade classifier with at least one row cascade-like or venetian blind-like one above the other arranged baffles, their spaces in cross flow are flowed through by sight air. Such a static cascade sifter also acts as a disagglomerator for those of the Pressed agglomerates (slugs). The deagglomeration the Schülpen is practically free of charge from the cascade sifter whithin.
Denn die Schülpen des Pressenaustragsgutes werden ggfs. zusammen mit dem der Kreislaufmahleinrichtung zugeführten Frischgut wie z.B. Zementklinkerbrocken oben auf den Kaskadensichter aufgegeben, und das Materialgemisch wandert durch Schwerkraft von oben nach unten über die kaskadenartig bzw. jalousieartig angeordneten Leitbleche und es wird dabei umgewälzt, wobei das Schülpenmaterial desagglomeriert, das dabei gleichzeitig etwa im Querstrom von der Sichtluft durchströmt wird, welche in der Lage ist, dabei das sowohl im Schülpenmaterial als auch ggfs. im Frischgut enthaltene Feingut aus dem von oben nach unten durch den Sichter wandernden Gutmaterial herauszusichten, und nur die Sichtergrobgutfraktion, befreit von dem Feingutmaterial, gelangt auf den rotierenden Materialförderring und wird von diesem nach oben mitgenommen und gelangt vom oberen Scheitelpunkt erneut in den Walzenspalt der Walzenpresse. Die Desagglomerierung des Schülpenmaterials kann durch die wie Mahlkörper ebenfalls kaskadenartig nach unten fallenden Frischgutbrokken wie z.B. Zementklinkerbrocken wirkungsvoll unterstützt werden. Ein eigener separat angetriebener Desagglomerator wie z.B. Prallhammermühle zur Desagglomerierung der Pressenschülpen vor Eintritt in den Sichter ist dabei überflüssig.Because the slugs of the press discharge material may be together with the fresh material fed to the circuit grinding device, such as e.g. Cement clinker blocks placed on top of the cascade sifter, and the mixture of materials moves from above by gravity down over the cascade or blind-like arrangement Baffles and it is circulated, the Schülpenmaterial deagglomerated, which at the same time approximately in cross flow from the Visible air is flowed through, which is able to do both fine material contained in the Schülpenmaterial as well as possibly in the fresh goods from the material moving from top to bottom through the classifier to see out, and only the classifier coarse fraction freed from the fine material, gets onto the rotating material conveyor ring and is taken up by it and reaches the upper one Peak again in the nip of the roller press. The Deagglomeration of the scaly material can be done by grinding media also fresh cascades falling cascading downwards such as. Cement clinker blocks are effectively supported. Your own separately powered disagglomerator such as Impact hammer mill to deagglomerate the press sleeves before entry in the classifier is unnecessary.
Ist das Frischgut feucht, was bei Zementrohmaterial zur Mahlung von Zementrohmehl in der Regel der Fall ist, so daß es nicht ohne weiteres im Walzenspalt der Hochdruckwalzenpresse gepresst werden könnte, und ist dementsprechend das gepresste Schülpenmaterial feucht, so daß es den rotierenden Materialförderring verkleben könnte, besteht die Möglichkeit, den unterhalb der Walzenpresse angeordneten Sichter z.B. Kaskadensichter statt mit Luft mit Heißgas zu betreiben, durch welches das feuchte Gutmaterial während seiner Desagglomerierung im Sichter wirkungsvoll vorgetrocknet werden kann. Wird der Hochdruckwalzenpresse nur eine trockene Grobgutfraktion zugeführt, so ist ein ruhiger Lauf der Walzenpresse gewährleistet.If the fresh material is moist, which results in the grinding of cement raw material Cement raw meal is usually the case, so it is not straightforward be pressed in the nip of the high-pressure roller press could, and is accordingly the pressed Schülpenmaterial moist, so that it sticks to the rotating material conveyor ring could there is the possibility that the arranged below the roller press Classifier e.g. Cascade classifier instead of air with hot gas operate through which the moist good material during its Deagglomeration can be effectively pre-dried in the classifier can. The high pressure roller press will only use a dry coarse material fraction fed, so a smooth running of the roller press is guaranteed.
Besteht das Frischgut aus Heißgut z.B. aus heißem nicht ausreichend gekühltem Zementklinker, so kann bei der erfindungsgemäßen Lösung dieses Heißgut im Kaskadensichter gleichzeitig auch gekühlt werden, was für den Betrieb der nachgeschalteten Hochdruck-Walzenpresse günstig ist. Denn es wäre schädlich, auf die Gutbettzerkleinerungs-Walzenpresse sehr heißes Material aufzugeben, was zur thermischen Überbeanspruchung wie Oberflächenverzug etc. der Pressenwalzen führen könnte.If the fresh goods consist of hot goods e.g. out of hot not enough cooled cement clinker, so in the solution according to the invention this hot material in the cascade classifier is also cooled at the same time be what the operation of the downstream high pressure roller press is cheap. Because it would be harmful on the material bed crushing roller press very hot material to give up what thermal overload such as surface distortion etc. of the Press rolls could lead.
Die erfindungsgemäße kompakte Kreislaufmahleinrichtung mit integrierter Hochdruck-Walzenpresse und Sichter eröffnet auch die Möglichkeit, die Mahleinrichtung im Gegensatz zu bisherigen Gutbettzerkleinerungs-Hochdruckwalzenpressen mit einem nicht zu hohen Pressdruck zu betreiben, um damit weniger harte Gutmaterialschülpen mit weniger scharfkantigen Partikeln zu erzeugen, wodurch der Verschleiß bei der Walzenpresse selbst sowie auch beim Sichter gemindert wird. Gleichzeitig wird durch eine nicht zu hohe Pressung des Mahlgutes eine breitere Kornverteilungskurve im Mahlprodukt erreicht, was bei vielen Produkten wie z.B. bei Zement erwünscht ist. Je weniger hart die aus der Hochdruck-Walzenpresse kommenden Schülpen sind, um so leichter lassen sie sich dann im unmittelbar nachgeschalteten Sichter wie z.B. Kaskadensichter oder auch Stabkorbsichter desagglomerieren. Die bei einer weniger hohen Pressung der Schülpen zu erwartende ansteigende Umlaufmahlanlagen-Kreislaufrate kann dann vom Sichter, insbesondere wenn dieser ein statischer Kaskadensichter ist, ohne weiteres bewältigt werden.The compact circuit grinding device according to the invention with integrated High pressure roller press and classifier also opens up the possibility the grinding device in contrast to previous high pressure high pressure roller presses with a not too high one Operate pressure to reduce less hard material material to produce with less sharp-edged particles, which the Wear on the roller press itself as well as on the classifier is reduced. At the same time, the pressure is not too high the grinding stock reaches a broader grain distribution curve in the grinding product, what with many products such as is desirable for cement. ever less hard coming from the high pressure roller press Schülpen are, the easier they are then immediately downstream classifiers such as Cascade sifter or rod basket sifter deagglomerate. The one with a less high pressure the increasing recycle grinding system circulation rate to be expected of the Schülpen can then by the classifier, especially if the classifier is static Cascade sifter is easily coped with.
Der innerhalb des rotierenden Materialförderringes unterhalb der Walzenpresse angeordnete Sichter kann aber auch ein dynamischer Sichter sein, dessen rotierender Staubkorb unterhalb der Pressenwalzen parallel zu diesen angeordnet ist, wobei im Bereich wenigstens eines Endes des Stabkorbs in der benachbarten Gehäuse-Stirnwand ein Austragskrümmer zum Abzug der mit Feingut beladenen Sichtluft angeordnet ist. The inside of the rotating material conveyor ring below the Roller press arranged sifters can also be a dynamic one Be a sifter, its rotating dust basket below the press rolls is arranged parallel to these, at least in the area one end of the rod basket in the adjacent housing end wall a discharge elbow for the extraction of the fine goods Visible air is arranged.
Die Erfindung und deren weitere Merkmale und Vorteile werden anhand der in den Figuren schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention and its further features and advantages are based on of the embodiments shown schematically in the figures explained in more detail.
Es zeigt:
- Figur 1:
- einen Vertikalschnitt durch die erfindungsgemäße kompakte Kreislaufmahleinrichtung quer zur Rotationsachse des drehbar gelagerten Materialförderrings mit integrierter Hochdruck-Walzenpresse und Sichter, und
- Figur 2:
- die Mahleinrichtung der Figur 1 in einer Variante im Vertikalschnitt längs einer Ebene durch den Walzenspalt.
- Figure 1:
- a vertical section through the compact circular grinding device according to the invention transverse to the axis of rotation of the rotatably mounted material conveyor ring with integrated high-pressure roller press and classifier, and
- Figure 2:
- the grinding device of Figure 1 in a variant in vertical section along a plane through the nip.
Bei der erfindungsgemäßen Kreislaufmahleinrichtung mit Hochdruck-Walzenpresse
zur Gutbettzerkleinerung körnigen Gutmateriales und
mit wenigstens einem Sichter sind die zwei gegenläufig angetriebenen
und durch einen Walzenspalt voneinander getrennten Walzen 10,
11 von einem Gehäuse umgeben bzw. umhaust, bestehend aus zwei
feststehenden, d.h. nicht rotierenden Seiten-Stirnwänden 12, 13, zwischen
denen ein auf Rollen 14 und 15 drehbar gelagerter Materialförderring
16 für einen internen Gutmaterialkreislauf angeordnet ist. Die
Rotation des Materialförderringes 16 erfolgt über dessen zylindrischen
Mantel z.B. durch die angetriebene Lagerrolle 15. Im Ausführungsbeispiel
sind die Lagerböcke der beiden Walzen 10, 11 in einem
Maschinenrahmen 17, 18 gelagert, die ein Teil der feststehenden
Seiten-Stirnwände 12, 13 sein können.In the circuit grinding device according to the invention with a high-pressure roller press
for comminution of granular good material and
with at least one classifier, the two are driven in opposite directions
and
Unterhalb des Walzenspaltes der Walzenpresse 10, 11 ist ein statischer
Kaskadensichter angeordnet, mit wenigstens einer Reihe
schräg nach unten geneigter kaskadenartig bzw. jalousieartig übereinander
angeordneter Leitbleche 19, deren Zwischenräume im
Querstrom von Sichtluft 20 durchströmt sind, die von der Seite her
durch wenigstens ein Zuführgehäuse 21 durch wenigstens eine der
Seiten-Stirnwände 12, 13 hindurch in den Raum unterhalb der Walzenpresse
eingeführt wird. Dieser von Sichtluft durchströmte Kaskadensichter
wirkt als Desagglomerator für die Walzenpressenschülpen
22, die zusammen mit dem frischen Mahlgut 23 dem Kaskadensichter
aufgegeben werden. Das durch eine Seitenöffnung in wenigstens
einer der Gehäuse-Stirnwände 12, 13 eingeführte Frischgut 23 kann
aber auch über Leitung 23a direkt von oben dem Walzenspalt der
Walzenpresse 10, 11 durch eine höher gelegene Seitenöffnung zugeleitet
werden. Jedenfalls sichtet die Sichtluft 20 aus dem Sichtgut die
Feingutfraktion aus, und die mit Feingut 24 beladene Sichtluft wird
über Leitung 25 aus der Kreislaufmahleinrichtung abgezogen, während
die vom Sichter aus dem Sichtgut abgetrennte Grobkornfraktion
26 auf die ggfs. mit Hubelementen versehene Innenbahn des rotierenden
Materialförderringes 16 gelangt, der die Grobkornfraktion 26
bis vor den oberen Scheitelpunkt des Ringes 16 nach oben mitnimmt
und dieses Gutmaterial 27 in den Walzenspalt der Walzenpresse 10,
11 abwirft. D.h., daß die Gutbettzerkleinerung in der Hochdruck-Walzenpresse
10, 11 vom Feingut 24 entlastet ist.Below the nip of the
Bei feuchtem frischem Aufgabegut 23 bzw. 23a und damit bei entsprechend
feuchten Gutmaterialschülpen 22, wobei das feuchte Gut
die Innenwandung des Materialförderringes 16 verkleben könnte, wird
als Sichtluft 20 ein Heißgasstrom eingesetzt, der das feuchte Gutmaterial
bei seiner Desagglomeration im Kaskadensichter wirkungsvoll
trocknen kann, so daß die energiesparende Kreislaufmahlanlage, die
durch einen außerordentlich niedrigen spezifischen Energiebedarf
(kWh/t) gekennzeichnet ist, auch zur Mahlung feuchter Güter eingesetzt
werden kann. When the
Figur 2 zeigt, daß unterhalb der Walzenpresse 10, 11 innerhalb des
rotierenden Materialförderringes 16 anstelle des statischen Kaskadensichters
19 oder sogar zusätzlich zu diesem ein dynamischer
Sichter mit drehbar gelagertem Stabkorb 28 angeordnet sein kann,
der z.B. über einen drehzahlregelbaren Elektromotor über eine Welle
29 angetrieben wird. Die Gehäusewände 12, 13 der Mahleinrichtung
sind dabei gleichzeitig das Sichtergehäuse. Im Bereich der Enden
des Stabkorbs 28 sind in den benachbarten Gehäuse-Stirnwänden 12,
13 Austragskrümmer 30, 30a zum Abzug der mit Feingut 24 beladenen
Sichtluft angeordnet.Figure 2 shows that below the
Es besteht auch die Möglichkeit, der kompakten Kreislaufmahleinrichtung
der Figuren 1 oder 2 einen externen Sichter, insbesondere dynamischen
Stabkorbsichter nachzuschalten, der aus dem Feingut 24
das darin enthaltene Feinstgut abtrennt, während die erhaltenen
Griese in die Kreislaufmahleinrichtung mit dem rotierenden Materialförderring
16 rezirkuliert werden.There is also the option of compact circuit grinding equipment
1 or 2 an external classifier, in particular dynamic
To connect the rod basket sifter, which consists of the
In der erfindungsgemäßen Kreislaufmahleinrichtung können abgesehen von Walzenpressen auch Walzenbrecher oder Walzenmühlen eingesetzt werden, die in der Regel mit einer niedrigeren Walzenanpresskraft arbeiten als Walzenpressen.In the circuit grinding device according to the invention can be disregarded of roller presses also roller crushers or roller mills can be used, usually with a lower roller pressure work as roller presses.
Claims (4)
- Circulating grinding apparatus having a highpressure roller press (10, 11) for the pressure comminution of granular stock material and having an integrated sifter (19) or (28), both units being surrounded by a housing which consists of two fixed side/end walls (12, 17 and 13, 18), between which a rotatably mounted material conveying ring (16) which can be set in rotation and is intended for internal stock-material circulation is arranged, the stock-material feed being effected from the side through one or more openings in one or both housing end walls (12, 17, 13, 18), and the stock-material discharge likewise being effected laterally through one or more openings (25) in the housing end wall, characterized in that the sifter (19) or (28) is arranged below the roller gap of the two rollers (10, 11) in the housing with the rotatably mounted material conveying ring (16).
- Circulating grinding apparatus according to Claim 1, characterized in that the sifter arranged below the roller press (10, 11) is a static cascade sifter which at the same time acts as a disagglomerator and has at least one row of baffle plates (19) which are inclined downwards at an angle and are arranged one above the other in a cascade-like or louver-like manner, and through the intermediate spaces of which a cross flow of sifting air occurs. through the intermediate spaces of which a cross flow of sifting air occurs.
- Circulating grinding apparatus according to Claim 1, characterized in that the sifter is a dynamic sifter, the rotating rod basket (28) of which is arranged below and parallel to the press rollers (10, 11), and in that a discharge bend (30) for drawing off the sifting air laden with fine stock (24) is arranged in the region of at least one end of the rod basket in the adjacent housing end wall (13).
- Circulating grinding apparatus according to Claim 2, characterized in that an external sifter, in particular a dynamic rod-basket sifter, is arranged downstream of the apparatus having the integrated sifter, e.g. static sifter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19726523 | 1997-06-23 | ||
| DE19726523A DE19726523A1 (en) | 1997-06-23 | 1997-06-23 | Cycle grinding device with high pressure roller press and sifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0887106A1 EP0887106A1 (en) | 1998-12-30 |
| EP0887106B1 true EP0887106B1 (en) | 2002-08-21 |
Family
ID=7833324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98111402A Expired - Lifetime EP0887106B1 (en) | 1997-06-23 | 1998-06-20 | Closed-circuit milling device with a high-pressure roller press and separator |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6032887A (en) |
| EP (1) | EP0887106B1 (en) |
| JP (1) | JPH1157508A (en) |
| DE (2) | DE19726523A1 (en) |
| DK (1) | DK0887106T3 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914288B4 (en) * | 1999-03-30 | 2007-07-26 | Khd Humboldt Wedag Gmbh | tube mill |
| DE19948727A1 (en) * | 1999-10-09 | 2001-04-12 | Kloeckner Humboldt Wedag | Circuit grinding device with high pressure roller mill and sifter |
| DE10018266A1 (en) * | 2000-04-13 | 2001-10-18 | Kloeckner Humboldt Wedag | Circular grinding device with high pressure rolling mill has sealing gap width between edge area of rotatable material delivery ring and adjoining side wall kept constant through sealing housing elastically connected to side wall |
| DE10018593A1 (en) * | 2000-04-14 | 2001-10-25 | Kloeckner Humboldt Wedag | Circular mill has pressure roller in area beneath coarse material or grain output of sifter(s) or beneath roller mill to be pressed against material on inner cylindrical wall of transport ring |
| DE10063798A1 (en) * | 2000-12-21 | 2002-06-27 | Kloeckner Humboldt Wedag | Rotary grinder with high pressure rolling mill has two or more bearing rollers mounted at ends of common rocker lever and spread out round circumferential region of material conveyor ring to support same from below |
| WO2006089326A1 (en) * | 2005-02-23 | 2006-08-31 | Andreas Reitmeir | Device for the separation of material mixtures |
| CN104209158A (en) * | 2014-08-29 | 2014-12-17 | 湖南三德科技股份有限公司 | A single-roller cake removing machine |
| CN106423382A (en) * | 2016-12-14 | 2017-02-22 | 郑州游爱网络技术有限公司 | Lump mineral crushing and primary screening device |
| CN108043508B (en) * | 2017-12-08 | 2024-01-23 | 成都化润药业有限公司 | Pesticide crushing equipment for improving crushing quality |
| CN109248760A (en) * | 2018-09-15 | 2019-01-22 | 江西中烟工业有限责任公司 | A kind of tobacco processing pulverizer efficiently preventing blocking |
| CN111495476A (en) * | 2020-04-26 | 2020-08-07 | 安徽盛康药业有限公司 | Medical intermediate grinding equipment |
| CN113083420B (en) * | 2021-04-02 | 2022-04-08 | 云南森博混凝土外加剂有限公司 | Preparation method of alkali-free environment-friendly concrete high-efficiency accelerator |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE123935C (en) * | ||||
| US2138715A (en) * | 1935-05-06 | 1938-11-29 | Paper & Ind Appliances Inc | Apparatus for treating paper pulp and the like |
| GB547181A (en) * | 1941-02-08 | 1942-08-17 | Albert Joshua Burrell | Reducing or crushing apparatus |
| US2552360A (en) * | 1945-01-10 | 1951-05-08 | Zichis Joseph | Method of and apparatus for dehydrating materials |
| DE939301C (en) * | 1949-05-12 | 1956-02-16 | Arno Andreas | Device for grinding bulk goods |
| US2612321A (en) * | 1949-06-11 | 1952-09-30 | Carl L Sidwell | Screening mill |
| US3701420A (en) * | 1969-04-25 | 1972-10-31 | Toshihiko Satake | Husker separator |
| US4052013A (en) * | 1976-03-08 | 1977-10-04 | Georgia-Pacific Corporation | Apparatus for shredding rubber tires and other scrap materials |
| DE3302176A1 (en) * | 1983-01-24 | 1984-07-26 | Klöckner-Humboldt-Deutz AG, 5000 Köln | METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROUND MATERIAL |
| DE3518543C3 (en) * | 1985-05-23 | 1996-12-19 | Kloeckner Humboldt Deutz Ag | Method and device for comminuting or grinding brittle ground material |
| IT209810Z2 (en) * | 1987-01-02 | 1988-11-04 | Satrind Srl | SHREDDING DEVICE. |
| DE3915432C2 (en) * | 1989-05-11 | 1996-05-09 | Kloeckner Humboldt Deutz Ag | Process for the production of standard cement |
| DE9016588U1 (en) * | 1990-12-06 | 1991-06-27 | Unger, Günther, 5628 Heiligenhaus | Grinding screen system |
| DE4223762B4 (en) * | 1992-07-18 | 2009-07-23 | Khd Humboldt Wedag Gmbh | Classifying device for sifting granular material and circulation grinding plant with the involvement of such a sifting device |
| DE4337215A1 (en) * | 1993-10-30 | 1995-05-04 | Kloeckner Humboldt Deutz Ag | Circulating grinding plant |
| DK0801985T3 (en) * | 1996-04-19 | 2001-08-06 | Deutz Ag | High-pressure roller press for crushing grained material |
-
1997
- 1997-06-23 DE DE19726523A patent/DE19726523A1/en not_active Withdrawn
-
1998
- 1998-06-20 EP EP98111402A patent/EP0887106B1/en not_active Expired - Lifetime
- 1998-06-20 DE DE59805230T patent/DE59805230D1/en not_active Expired - Fee Related
- 1998-06-20 DK DK98111402T patent/DK0887106T3/en active
- 1998-06-23 JP JP10176462A patent/JPH1157508A/en active Pending
- 1998-06-23 US US09/103,280 patent/US6032887A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0887106A1 (en) | 1998-12-30 |
| US6032887A (en) | 2000-03-07 |
| DE19726523A1 (en) | 1998-12-24 |
| JPH1157508A (en) | 1999-03-02 |
| DE59805230D1 (en) | 2002-09-26 |
| DK0887106T3 (en) | 2002-12-23 |
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