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EP2024091B1 - Roller press, in particular for interparticle crushing - Google Patents

Roller press, in particular for interparticle crushing Download PDF

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Publication number
EP2024091B1
EP2024091B1 EP07725735A EP07725735A EP2024091B1 EP 2024091 B1 EP2024091 B1 EP 2024091B1 EP 07725735 A EP07725735 A EP 07725735A EP 07725735 A EP07725735 A EP 07725735A EP 2024091 B1 EP2024091 B1 EP 2024091B1
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EP
European Patent Office
Prior art keywords
nip
roller
pressure
pressure screw
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.)
Not-in-force
Application number
EP07725735A
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German (de)
French (fr)
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EP2024091A1 (en
Inventor
Siegfried Strasser
Andreas Enders
Silke Liedtke
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KHD Humboldt Wedag AG
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KHD Humboldt Wedag AG
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Publication of EP2024091A1 publication Critical patent/EP2024091A1/en
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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
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses

Definitions

  • the invention relates to a roll press with two rotatably mounted counter-rotating and separated by a press nip rolls for pressure treatment, in particular for Gutbettzerkleintation or compaction or briquetting granular material, with an above the nip arranged Gutaufgabeschacht with an entry opening for the introduction of coarse material and with a Entrance opening for the introduction of fines material such.
  • the DE-38 23 929 A1 are also used in a machine frame three rolls, namely a driven main roll, at the upper portion of a non-driven idler roller and at the lower portion of a second non-driven idler roller are pressed by means of hydraulic pressure devices.
  • a roller press is known above the nip of which a plurality of filling ducts are arranged next to one another, in each of which a filling screw is located, ie the entire feed material is fed to the nip via the filling screws. Separate treatment and feed of coarse material and fine material in the nip does not take place.
  • the invention has for its object to provide a particular used for Gutbettzerkleintation comparatively simple built roller press, in the Gutaufgabeschacht both coarse material such. B. Frischgut as well as fine-grained material such. B. recirculated grits of a downstream classifier and / or z. As fly ash be introduced, despite the significantly different grain size and particle size distribution in the two to be recovered in the nip streams the stability of the bed of material or grinding bed and thus a high grinding efficiency is guaranteed.
  • the two streams coarse-grained material and fine-grained material are introduced into the crop hopper separated from each other.
  • the Gutaufgabeschacht on its upper side a Grobguteintragsö réelle and preferably lying on the side transverse to the nip at least one fine material insertion opening.
  • a pressure screw conveying the fine grain under pressure is inserted into the feed hopper whose nozzle-like orifice reaches into the central region of the feed intake of the press nip of the roller press and the nozzle of the pressure screw via a joint to the discharge opening the pressure screw is articulated.
  • the fine grain material is surrounded by the coarse grain material in the high pressure zone of the nip, whereby the risk of segregation of the two streams in Gutaufgabeschacht and an alternating supply of coarse and fine material is minimized in the nip.
  • the nozzle of the pressure screw which is inserted transversely to the nip from the side in the crop hopper horizontally or obliquely to the horizontal lying hinged via the joint to the mouth of the pressure screw.
  • the nozzle can in particular center flat nozzle within the print zone in the good bed above the nip of the roller press in the printing center itself.
  • the roll press comprises two rotatably mounted, counterrotatable and separated by a press nip rollers 10, 11, of which the roller 10 is the hard roller, while the other roller 11 is formed as a transverse to the nip movable Loswalze whose bearing housing supported by hydraulic cylinders are, with which the roller press force is used up.
  • a Gutaufgabeschacht 12 which has at its top an entry opening 13 for the introduction of coarse material 14, which is supplied under the action of gravity.
  • Grobgutmaterial 14 may be z. B. to be comminuted or to be ground fresh product such.
  • cement clinker, etc. act and the slope top of this bulk material within the Gutaufgabeschachtes 12 is indicated by 15.
  • Grain size and grain distribution of the feed opening 18 of the screw conveyor 17 imported fines 19 are significantly different to the coarse material 14.
  • the grain size of the introduced fines 19 z. B. up to 100% ⁇ 3 mm, which is the case when introducing z. B. of fine recirculated reformergrie hybrid, fly ash, blastfurnace slag, slag meal etc ..
  • the nozzle at the mouth of the pressure screw 17 for introducing the fine material fraction 19 is arranged above the narrowest nip arranged parallel to this lying within the Gutbett potentiallyung 15 flat nozzle 20.
  • This flat nozzle 20 is articulated via a hinge 21 to the mouth of the pressure screw 17.
  • the nozzle 20 of the pressure screw 19 in the center of Guteinzugs Schemees the press nip is surrounded on all sides by the remaining in the nip coarse grain fraction 15, whereby segregation of the two streams in the narrowest nip, in which in the Gutbettzerklein für the comparatively high roll pressure in the Gutmaterial physicallyung effective is, are avoided.
  • the pressing force on the material of the rolls 10, 11 of the roll press contributes more than 2 MN / m roll length.
  • the grain size of a substantial part of the abandoned coarse material 14 may be larger than the width of the narrowest nip of z. B. 20 mm, which is the case for. B. in grinding not pre-shredded cement clinker with a grain size to z. B. 100 mm, so that then the feedstock in the narrowest nip is crushed by a combined single grain size reduction and comminution.
  • the material passes from the nip crushed and partially agglomerated, ie compacted into slugs 22 whose proportion of particles reduced to the desired final fineness (eg 30% ⁇ 90 ⁇ m) can already be relatively high.
  • the slugs 22 are then deagglomerated and sifted in a downstream device, with the classifier 19 being recirculated to the pressure screw 17 and from there into the narrowest nip of the roller press.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Processing Of Solid Wastes (AREA)
  • Disintegrating Or Milling (AREA)

Description

Die Erfindung betrifft eine Walzenpresse mit zwei drehbar gelagerten gegenläufig angetriebenen und durch einen Presswalzenspalt voneinander getrennten Walzen zur Druckbehandlung, insbesondere zur Gutbettzerkleinerung oder Kompaktierung bzw. Brikettierung körnigen Gutes, mit einem oberhalb des Walzenspaltes angeordneten Gutaufgabeschacht mit einer Eintragsöffnung für die Einführung von Grobgutmaterial und mit einer Einträgsöffnung für die Einführung von Feingutmaterial wie z. B. die rezirkulierten. Grieße einer im Kreislauf geschalteten Sichtereinrichtung.The invention relates to a roll press with two rotatably mounted counter-rotating and separated by a press nip rolls for pressure treatment, in particular for Gutbettzerkleinerung or compaction or briquetting granular material, with an above the nip arranged Gutaufgabeschacht with an entry opening for the introduction of coarse material and with a Entrance opening for the introduction of fines material such. B. the recirculated. Meal of a circulating classifier.

Beim Betrieb derartiger Walzenpressen zur Druckbehandlung körnigen Gutes müssen die einzelnen Stücke bzw. Partikel des in den Gutaufgabeschacht eingeführten Mahlgutes wie z. B. Zementrohmaterial, Zementklinker, Erze oder dergleichen von den gegenläufig angetriebenen Walzen erfasst und durch Reibung in den Walzenspalt eingezogen werden. Dabei werden die einzelnen Partikel des in den Bereich des engsten Walzenspaltes eingezogenen Mahlgutes in einem Gutbett, d. h. in einer zwischen den beiden Walzenoberflächen zusammengedrückten Materialschüttung bei Anwendung eines hohen Pressdruckes gegenseitig zerkleinert, so dass man hierbei von der sogenannten Gutbettzerkleinerung spricht.When operating such roller presses for pressure treatment granular material, the individual pieces or particles of imported into the Gutaufgabeschacht regrind such. As cement raw material, cement clinker, ores or the like are detected by the counter-rotating rollers and fed by friction in the nip. In this case, the individual particles of the drawn into the region of the narrowest nip grinding material in a bed of material, d. H. in a pressed together between the two roll surfaces material bed when using a high pressing pressure mutually crushed, so that one speaks here of the so-called Gutbettzerkleinerung.

Ist das Aufgabegut zur Walzenpresse zumindest zum Teil schon sehr feinkörnig, indem in den Gutaufgabeschacht zum frischen Aufgabegut z. B. große Mengen der Grieße eines der Walzenpresse ggf. über eine Feinmühle nachgeschalteten Sichters rezirkuliert werden, so können dadurch das Guteinzugsvermögen der Walzen verschlechtert und die Durchsatzleistung der Walzenpresse vermindert werden. Denn die Zufuhr von Gutmaterialströmen mit deutlich unterschiedlicher Korngröße und Kornverteilung ist wegen Entmischung im Gutaufgabeschacht zur Walzenpresse problematisch. Die Schüttdichte der rezirkulierten Grieße ist nämlich erheblich kleiner als die Schüttdichte des frischen Aufgabegutes, d. h. die Porosität der Sichtergrieße ist größer als diejenige des frischen Aufgabegutes. Die wechselnde Zufuhr von grobem und feinem Material zum Walzenspalt stört die Stabilität des Mahlbettes und reduziert den Mahlwirkungsgrad.Is the feed to the roller press at least in part already very fine-grained by z in the Gutaufgabeschacht for fresh feed. B. large amounts of the grits of the roller press, if necessary via a Fine mill downstream classifier can be recirculated, then the Guteinzugsvermögen the rolls can be degraded and the throughput of the roller press can be reduced. Because the supply of Gutmaterialströmen with significantly different grain size and particle size distribution is problematic because of segregation in Gutaufgabeschacht for roller press. Namely, the bulk density of the recirculated grits is considerably smaller than the bulk density of the fresh feedstock, ie the porosity of the classifier grain is greater than that of the fresh feedstock. The changing supply of coarse and fine material to the nip interferes with the stability of the grinding bed and reduces the milling efficiency.

Es ist daher schon vorgeschlagen worden, DE 39 16 641 A1 Figuren 2 und 3, bei einer Walzenpresse zur Gutbettzerkleinerung in den Gutaufgabeschacht das Grobgut z. B. frisches Mahlgut und das Feingut z. B. rezirkulierte. Sichtergrieße, Hüttensand etc. voneinander getrennt einzuführen und das Feingut im Gutaufgabeschacht durch eine eigene Vorverdichterwalze vorzuverdichten, um auf diese Weise die Porosität des Feingutes an die Porosität des Grobgutes bzw. Frischgutes anzunähern und die Guteinzugsbedingung des aus Frischgut und vorverdichtetem Feingut bestehenden Gutmateriales im Walzenspalt der eigentlichen Hochdruck-Walzenpresse zu verbessern. Diese Technologie verlangt allerdings den Einsatz wenigstens dreier Walzen und ist dementsprechend aufwendig.It has therefore already been suggested DE 39 16 641 A1 Figures 2 and 3, in a roll press for Gutbettzerkleinerung in Gutaufgabeschacht the coarse z. As fresh ground material and the fines z. B. recirculated. Sichtergrieße, blast furnace slag, etc. introduced separately from each other and vorzuverdichten the fines in Gutaufgabeschacht by its own Vorverdichterwalze to approximate in this way the porosity of the fine material to the porosity of coarse material or fresh good and the Guteinzugsbedingung consisting of fresh material and pre-compacted fine material in the nip of actual high-pressure roller press to improve. However, this technology requires the use of at least three rollers and is therefore expensive.

Bei der Gutbettzerkleinerungs-Walzenpresse der DE-38 23 929 A1 sind in einem Maschinenrahmen ebenfalls drei Walzen eingesetzt, nämlich eine angetriebene Hauptwalze, an deren oberen Bereich eine nicht angetriebene Mitläuferwalze und an deren unteren Bereich eine zweite nicht angetriebene Mitläuferwalze mittels hydraulischer Pressdruckeinrichtungen angedrückt werden. Bei dieser Lösung wird im ersten (oberen) Walzenspalt ausschließlich das frische Aufgabegut vorzerkleinert, während in den zweiten (unteren) Walzenspalt der insgesamt zweistufig arbeitenden Walzenpresse die rezirkulierten Sichtergrieße eines nachgeschalteten Sichters eingeführt werden, d. h. in den unteren Walzenspalt muss das im oberen Walzenspalt bereits vorgepresste verdichtete Gutmaterial und das demgegenüber vergleichsweise sehr lockere poröse Sichtergrießematerial durch Reibung eingezogen werden, was aus den o. g. Gründen problematisch ist.In the Gutbettzerkleinerungs roller press the DE-38 23 929 A1 are also used in a machine frame three rolls, namely a driven main roll, at the upper portion of a non-driven idler roller and at the lower portion of a second non-driven idler roller are pressed by means of hydraulic pressure devices. In this solution, only the fresh feed material is in the first (upper) nip pre-crushed, while in the second (lower) nip of the total two-stage working roll press the recirculated Sichtergrieße a downstream classifier are introduced, ie in the lower nip the already pre-pressed in the upper nip compacted Gutmaterial and the comparatively very loose porous Sichtergrießematerial must be drawn by friction , which is problematic for the above reasons.

Außerdem ist aus der DE-C 38 02 173 zum Verpressen feinkörniger Salze eine Walzenpresse bekannt, oberhalb von deren Walzenspalt mehrere Füllschächte nebeneinander angeordnet sind, in denen sich jeweils eine Füllschnecke befindet, d. h. das gesamt Aufgabegut wird dem Walzenspalt über die Füllschnecken zugeführt. Eine getrennte Behandlung und Einspeisung von Grobgut und Feingut in den Walzenspalt findet dabei nicht statt.Moreover, from the DE-C 38 02 173 for compacting fine-grained salts, a roller press is known above the nip of which a plurality of filling ducts are arranged next to one another, in each of which a filling screw is located, ie the entire feed material is fed to the nip via the filling screws. Separate treatment and feed of coarse material and fine material in the nip does not take place.

Aus der US 2005/035 479 A1 ist eine Walzerpresse bekannt, welche separate Eintragsöffnungen für Grob- und Feingut, jeweils mit Förderschnecken aufweist.From the US 2005/035 479 A1 is a waltz press known, which has separate entry openings for coarse and fine material, each with screw conveyors.

Der Erfindung liegt die Aufgabe zugrunde, eine insbesondere zur Gutbettzerkleinerung eingesetzte vergleichsweise einfach gebaute Walzenpresse zu schaffen, in deren Gutaufgabeschacht sowohl grobkörniges Gutmaterial wie z. B. Frischgut als auch feinkörniges Gutmaterial wie z. B. rezirkulierte Grieße eines nachgeschalteten Sichters und/oder z. B. Flugasche eingeführt werden, wobei trotz der deutlich unterschiedlichen Korngröße und Kornverteilung in den beiden in den Walzenspalt einzuziehenden Stoffströmen die Stabilität des Gutbettes bzw. Mahlbettes und damit ein hoher Mahlwirkungsgrad gewährleistet ist.The invention has for its object to provide a particular used for Gutbettzerkleinerung comparatively simple built roller press, in the Gutaufgabeschacht both coarse material such. B. Frischgut as well as fine-grained material such. B. recirculated grits of a downstream classifier and / or z. As fly ash be introduced, despite the significantly different grain size and particle size distribution in the two to be recovered in the nip streams the stability of the bed of material or grinding bed and thus a high grinding efficiency is guaranteed.

Diese Aufgabe wird gemäß der Erfindung mit einer Walzenpresse mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved according to the invention with a roller press with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

Bei der erfindungsgemäßen Walzenpresse insbesondere zur Gutbettzerkleinerung werden die beiden Stoffströme grobkörniges Gutmaterial und feinkörniges Gutmaterial in den Gutaufgabeschacht getrennt voneinander eingeführt. Dazu hat der Gutaufgabeschacht an seiner Oberseite eine Grobguteintragsöffnung und vorzugsweise an der Seite quer zum Walzenspalt liegend wenigstens eine Feinguteintragsöffnung. Durch die wenigstens eine Feingut-Eintragsöffnung des Gutaufgabeschachtes ist in diesen gemäß der Erfindung eine das Feinkorn unter Pressdruck fördernde Druckschnecke eingeführt, deren düsenartige Ausmündung bis in den zentralen Bereich des Guteinzuges des Presswalzenspaltes der Walzenpresse reicht und die Düse der Druckschnecke über ein Gelenk an die Ausmündung der Druckschnecke angelenkt ist. Dabei wird in der Hochdruckzone des Walzenspaltes das Feinkornmaterial vom Grobkornmaterial umschlossen, wodurch die Gefahr einer Entmischung beider Stoffströme im Gutaufgabeschacht und einer wechselnden Zufuhr von grobem und feinem Material in den Walzenspalt minimiert ist.In the roll press according to the invention, in particular for comminution, the two streams coarse-grained material and fine-grained material are introduced into the crop hopper separated from each other. For this purpose, the Gutaufgabeschacht on its upper side a Grobguteintragsöffnung and preferably lying on the side transverse to the nip at least one fine material insertion opening. Due to the at least one fine material inlet opening of the material feed chute, a pressure screw conveying the fine grain under pressure is inserted into the feed hopper whose nozzle-like orifice reaches into the central region of the feed intake of the press nip of the roller press and the nozzle of the pressure screw via a joint to the discharge opening the pressure screw is articulated. In this case, the fine grain material is surrounded by the coarse grain material in the high pressure zone of the nip, whereby the risk of segregation of the two streams in Gutaufgabeschacht and an alternating supply of coarse and fine material is minimized in the nip.

Nach einem weiteren Merkmal der Erfindung kann die Düse der Druckschnecke, die quer zum Walzenspalt von der Seite in den Gutaufgabeschacht horizontal oder schräg zur Horizontalen liegend eingeführt ist über das Gelenk an die Ausmündung der Druckschnecke angelenkt sein. Damit kann sich die Düse insbesondere Flachdüse innerhalb der Druckzone im Gutbett oberhalb des Walzenspaltes der Walzenpresse im Druckzentrum selbst zentrieren.According to a further feature of the invention, the nozzle of the pressure screw, which is inserted transversely to the nip from the side in the crop hopper horizontally or obliquely to the horizontal lying hinged via the joint to the mouth of the pressure screw. Thus, the nozzle can in particular center flat nozzle within the print zone in the good bed above the nip of the roller press in the printing center itself.

Die Erfindung und deren weitere Merkmale und Vorteile werden anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert.The invention and its further features and advantages will be explained in more detail with reference to the embodiments illustrated in the drawings.

Es zeigt:

Fig. 1:
eine erste Ausführungsform der erfindungsgemäßen Walzenpresse mit einer etwa horizontal angeordneten in den Gutaufgabeschacht eingeführten Feingut-Druckschnecke, und
Fig. 2:
eine zweite Ausführungsform der Walzenpresse, bei welcher die Druckschnecke schräg zur Horizontalen geneigt angeordnet ist.
It shows:
Fig. 1:
a first embodiment of the roller press according to the invention with an approximately horizontally arranged introduced into the Gutaufgabeschacht fines pressure screw, and
Fig. 2:
a second embodiment of the roll press, wherein the pressure screw is arranged obliquely inclined to the horizontal.

Nach Fig. 1 weist die erfindungsgemäße Walzenpresse zwei drehbar gelagerte, gegenläufig rotierbare und durch einen Presswalzenspalt voneinander getrennte Walzen 10, 11 auf, von denen die Walze 10 die Festwalze ist, während die andere Walze 11 als quer zum Walzenspalt bewegliche Loswalze ausgebildet ist, deren Lagergehäuse über Hydraulikzylinder abgestützt sind, mit denen die Walzenpresskraft aufgebraucht wird.To Fig. 1 the roll press according to the invention comprises two rotatably mounted, counterrotatable and separated by a press nip rollers 10, 11, of which the roller 10 is the hard roller, while the other roller 11 is formed as a transverse to the nip movable Loswalze whose bearing housing supported by hydraulic cylinders are, with which the roller press force is used up.

Oberhalb des Walzenspaltes ist ein Gutaufgabeschacht 12 angeordnet, der an seiner Oberseite eine Eintragsöffnung 13 zur Einführung von Grobgutmaterial 14 aufweist, das unter Schwerkrafteinwirkung zugeführt wird. Beim Grobgutmaterial 14 kann es sich z. B. um zu zerkleinerndes bzw. zu mahlendes Frischgut wie z. B. Zementklinker etc. handeln, und die Böschungsoberseite dieses Schüttgutes innerhalb des Gutaufgabeschachtes 12 ist mit 15 angezeigt. Ferner weist der Gutaufgabeschacht 12 an der Seite wenigstens eine Feingut-Eintragsöffnung 16 auf, durch die hindurch in den Aufgabeschacht 12 eine das Feingutmaterial unter Pressdruck fördernde Druckschnecke 17 eingeführt ist, deren düsenartige Ausmündung bis in den zentralen Bereich des Guteinzuges des Presswalzenspaltes reicht. Korngröße und Kornverteilung des in die Aufgabeöffnung 18 der Druckschnecke 17 eingeführten Feingutmaterials 19 sind deutlich unterschiedlich zum Grobgutmaterial 14. So kann die Korngröße des eingeführten Feingutes 19 z. B. bis zu 100 % < 3 mm betragen, das ist der Fall bei der Einführung z. B. von feinen rezirkulierten Sichtergrießen, Flugasche, Hüttensand, Schlackenmehl etc..Above the nip a Gutaufgabeschacht 12 is arranged, which has at its top an entry opening 13 for the introduction of coarse material 14, which is supplied under the action of gravity. When Grobgutmaterial 14 may be z. B. to be comminuted or to be ground fresh product such. As cement clinker, etc. act, and the slope top of this bulk material within the Gutaufgabeschachtes 12 is indicated by 15. Furthermore, the crop feed chute 12 on the side of at least one fines entry opening 16 through which in the feed chute 12 a fine material under pressure pressure-promoting screw conveyor 17 is inserted, the nozzle-like orifice extends into the central region of the Guteinzuges the press nip. Grain size and grain distribution of the feed opening 18 of the screw conveyor 17 imported fines 19 are significantly different to the coarse material 14. Thus, the grain size of the introduced fines 19 z. B. up to 100% <3 mm, which is the case when introducing z. B. of fine recirculated Sichtergrießen, fly ash, blastfurnace slag, slag meal etc ..

Die Düse an der Ausmündung der Druckschnecke 17 zur Einführung der Feingutfraktion 19 ist eine oberhalb des engsten Walzenspaltes angeordnete parallel zu diesem liegende innerhalb der Gutbettschüttung 15 angeordnete Flachdüse 20. Diese Flachdüse 20 ist über ein Gelenk 21 an die Ausmündung der Druckschnecke 17 angelenkt. Jedenfalls ist die Düse 20 der Druckschnecke 19 im Druckzentrum des Guteinzugsbereiches des Presswalzenspaltes allseitig von der im Walzenspalt im übrigen befindlichen Grobkornfraktion 15 umschlossen, wodurch Entmischungen der beiden Stoffströme im Bereich des engsten Walzenspaltes, in welchem bei der Gutbettzerkleinerung der vergleichsweise hohe Walzenpressdruck in der Gutmaterialschüttung wirksam wird, vermieden sind.The nozzle at the mouth of the pressure screw 17 for introducing the fine material fraction 19 is arranged above the narrowest nip arranged parallel to this lying within the Gutbettschüttung 15 flat nozzle 20. This flat nozzle 20 is articulated via a hinge 21 to the mouth of the pressure screw 17. In any case, the nozzle 20 of the pressure screw 19 in the center of Guteinzugsbereiches the press nip is surrounded on all sides by the remaining in the nip coarse grain fraction 15, whereby segregation of the two streams in the narrowest nip, in which in the Gutbettzerkleinerung the comparatively high roll pressure in the Gutmaterialschüttung effective is, are avoided.

Im Unterschied zur Fig. 1 ist beim Ausführungsbeispiel der Fig. 2 die quer zum Walzenspalt liegende Druckschnecke 17 schräg zur Horizontalen liegend in den Gutaufgabeschacht 12 der Rollenpresse eingeführt, d. h. das Gutaufgabeende der Druckschnecke 17 liegt höher als die Ausmündung der Druckschnecke mit ihrer Flachdüse 20. Diese Lösung bietet noch den zusätzlichen Vorteil, dass durch die Druckschnecke 17 die Montage und Demontage der Walze 10 nicht behindert wird.In contrast to Fig. 1 is in the embodiment of Fig. 2 the transversely to the nip pressure roller 17 lying obliquely to the horizontal lying in the Gutaufgabeschacht 12 of the roller press introduced, ie the Gutaufgabeende the pressure screw 17 is higher than the mouth of the pressure screw with its flat nozzle 20. This solution has the additional advantage that by the pressure screw 17th the assembly and disassembly of the roller 10 is not hindered.

Bei allen Ausführungsbeispielen beiträgt die auf das Gut drückende Presskraft der Walzen 10, 11 der Walzenpresse mehr als 2 MN/m Walzenlänge. Die Korngröße eines wesentlichen Teils des aufgegebenen Grobgutmateriales 14 kann größer sein als die Weite des engsten Walzenspaltes von z. B. 20 mm, was der Fall ist z. B. bei zu mahlendem nicht vorzerkleinerten Zementklinker mit einer Korngröße bis z. B. 100 mm, so dass dann das Aufgabegut im engsten Walzenspalt durch eine kombinierte Einzelkornzerkleinerung und Gutbettzerkleinerung zerkleinert wird. Das Gut tritt aus dem Walzenspalt zerkleinert und teilweise agglomeriert, d. h. zu Schülpen 22 verpresst aus, deren Anteil an bis zur gewünschten Endfeinheit reduzierten Partikeln (z. B. 30 % < 90 µm) bereits relativ hoch sein kann. Die Schülpen 22 werden anschließend in einer nachgeschalteten Einrichtung desagglomeriert und gesichtet, wobei die Sichtergrieße 19 zur Druckschnecke 17 und von dort in den engsten Walzenspalt der Rollenpresse rezirkuliert werden.In all embodiments, the pressing force on the material of the rolls 10, 11 of the roll press contributes more than 2 MN / m roll length. The grain size of a substantial part of the abandoned coarse material 14 may be larger than the width of the narrowest nip of z. B. 20 mm, which is the case for. B. in grinding not pre-shredded cement clinker with a grain size to z. B. 100 mm, so that then the feedstock in the narrowest nip is crushed by a combined single grain size reduction and comminution. The material passes from the nip crushed and partially agglomerated, ie compacted into slugs 22 whose proportion of particles reduced to the desired final fineness (eg 30% <90 μm) can already be relatively high. The slugs 22 are then deagglomerated and sifted in a downstream device, with the classifier 19 being recirculated to the pressure screw 17 and from there into the narrowest nip of the roller press.

Claims (4)

  1. Roller press having two rotatably mounted rollers (10, 11) which are driven in opposite directions, are separated from one another by a press roller nip and are intended for pressure treatment, in particular for material bed comminution or compaction or briquetting of granular material, having a material feed hopper (12) which is arranged above the roller nip and has an inlet opening (13) for introducing coarse material and an inlet opening (16) for introducing fine material such as, for example, the recirculated grits from a sifter device connected in the circuit,
    characterized in that a pressure screw (17) which conveys the fine material under pressure is inserted into the material feed hopper (12) through the at least one fine-material inlet opening (16) in the latter, the nozzle-like issue of said pressure screw reaches into the central region of the material draw-in of the press roller nip and the nozzle (20) of the pressure screw (17) is linked to the issue of the pressure screw by means of a joint (21).
  2. Roller press according to Claim 1,
    characterized in that the pressure screw (17) is inserted into the material feed hopper (12) from the side transversely with respect to the roller nip, in a manner lying horizontally or obliquely with respect to the horizontal.
  3. Roller press according to one or more of Claims 1 to 2,
    characterized in that the nozzle (20) of the pressure screw (17) is surrounded on all sides by the coarse fraction (15) located in the roller nip in the centre of pressure of the region of material draw-in of the press roller nip.
  4. Roller press according to Claims 1 to 3,
    characterized in that the grain size of the fine fraction to be conveyed by the pressure screw (17) is up to 100% < 3 mm.
EP07725735A 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing Not-in-force EP2024091B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025833A DE102006025833A1 (en) 2006-06-02 2006-06-02 Roller press especially for comminution
PCT/EP2007/004855 WO2007140929A1 (en) 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing

Publications (2)

Publication Number Publication Date
EP2024091A1 EP2024091A1 (en) 2009-02-18
EP2024091B1 true EP2024091B1 (en) 2012-12-12

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EP07725735A Not-in-force EP2024091B1 (en) 2006-06-02 2007-06-01 Roller press, in particular for interparticle crushing

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US (1) US20090236455A1 (en)
EP (1) EP2024091B1 (en)
CN (1) CN101460247A (en)
CA (1) CA2653065A1 (en)
DE (1) DE102006025833A1 (en)
DK (1) DK2024091T3 (en)
RU (1) RU2008144301A (en)
WO (1) WO2007140929A1 (en)

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RU2498854C2 (en) * 2008-07-02 2013-11-20 Бюлер Аг Method of flour production from grain, roll mill, application of roll mill, zigzag sieving machine and its application
DE102008043140A1 (en) 2008-07-02 2010-01-07 Bühler AG Method for producing e.g. flour from wheat, involves using mill i.e. material-bed roller mill, for producing plant milling product, where breaking-up and separation steps of milling product follow grinding step in mill
CN101985107A (en) * 2010-07-15 2011-03-16 王维东 Plastic grinder
US8632028B2 (en) 2010-09-02 2014-01-21 Flsmidth A/S Device for the comminution of material
CN103223364A (en) * 2013-04-23 2013-07-31 安徽省荆涂机电工程有限公司 Double helix stirring and crushing integrated apparatus
DE102013018325B4 (en) 2013-10-31 2019-03-21 Khd Humboldt Wedag Gmbh High-pressure roller press with regrind removal and method for avoiding vibrations during the application of regrind
CN104785351A (en) * 2015-03-27 2015-07-22 中建材（合肥）粉体科技装备有限公司 Partitioning feeding device of roller press
RU2628297C2 (en) * 2015-09-02 2017-08-15 Федеральное государственное бюджетное научное учреждение "Зональный научно-исследовательский институт сельского хозяйства Северо-Востока имени Н.В. Рудницкого" (ФГБНУ "НИИСХ Северо-Востока") Two-stage grain crusher for grain fodder production
CN107088466A (en) * 2017-04-28 2017-08-25 南京市罗奇泰克电子有限公司 A kind of waste material breaker in circuit substrate packaging process
CN107362860A (en) * 2017-08-09 2017-11-21 陈秀玲 Medicinal material disintegrating machine
ES2824761T3 (en) * 2018-05-25 2021-05-13 Buehler Ag Distribution-dosing device for a roll mill, roll mill with such a distribution-dosing device and process for grinding material to be ground
CN110860330A (en) * 2018-08-27 2020-03-06 唐山三发普林饲料有限公司 Ultrafine grinder
CN112337557A (en) * 2020-10-19 2021-02-09 南通康威尔生物化工有限公司 White spirit is made and is used raw materials reducing mechanism
CN112570079A (en) * 2020-11-30 2021-03-30 福鼎未来景观设计有限公司 Roller press for cement production
CN117181362B (en) * 2023-09-15 2024-03-29 南京博达环境科技有限公司 Solid waste base geopolymer rolling equipment

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Also Published As

Publication number Publication date
DK2024091T3 (en) 2013-03-25
DE102006025833A1 (en) 2007-12-06
EP2024091A1 (en) 2009-02-18
RU2008144301A (en) 2010-07-20
CN101460247A (en) 2009-06-17
WO2007140929A1 (en) 2007-12-13
US20090236455A1 (en) 2009-09-24
CA2653065A1 (en) 2007-12-13

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