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EP2024091A1 - Roller press, in particular for interparticle crushing - Google Patents

Roller press, in particular for interparticle crushing

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Publication number
EP2024091A1
EP2024091A1 EP07725735A EP07725735A EP2024091A1 EP 2024091 A1 EP2024091 A1 EP 2024091A1 EP 07725735 A EP07725735 A EP 07725735A EP 07725735 A EP07725735 A EP 07725735A EP 2024091 A1 EP2024091 A1 EP 2024091A1
Authority
EP
European Patent Office
Prior art keywords
nip
pressure
nozzle
pressure screw
fine
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.)
Granted
Application number
EP07725735A
Other languages
German (de)
French (fr)
Other versions
EP2024091B1 (en
Inventor
Siegfried Strasser
Andreas Enders
Silke Liedtke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP2024091A1 publication Critical patent/EP2024091A1/en
Application granted granted Critical
Publication of EP2024091B1 publication Critical patent/EP2024091B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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 Gutbettzerklein ceremonies or compaction or briquetting granular good, with a arranged above the nip Gutaufgabeschacht with an entry opening for the introduction of coarse material and with a Opening for the introduction of fine material such.
  • the supply of Gutmaterialströmen with significantly different grain size and particle size distribution is problematic because of segregation in Gutaufgabeschacht to roll 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.
  • Gutbettzerkleintations roller press of DE-38 23 929 A1 also three rollers are used in a machine frame, namely a driven main roll, at its upper portion 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 several filling shafts are arranged side by side, in each of which a filling screw is located, d. H. 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 are introduced, despite the significantly different particle size and particle size distribution in the two to be recovered in the nip flows the stability of the bed of material or grinding bed and thus a high Mahl Fischs- degree is guaranteed.
  • a pressure screw conveying the fine grain under pressure is introduced into the latter according to the invention, the nozzle-like orifice of which extends into the central region of the product feed of the press nip of the roll press.
  • the fine-grained material is enclosed by the coarse-grained material, whereby the risk of segregation of the two streams in the crop hopper and a changing supply of coarse and fine material into the nip is minimized. This succeeds particularly well when the nozzle of the pressure screw for introducing the fine material is arranged above the narrowest nip parallel to this flat nozzle.
  • the nozzle of the pressure screw which is inserted transversely to the nip from the side in the Gutaufgabeschacht horizontally or obliquely to the horizontal lying hinged via a hinge 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.
  • Fig. 1 a first embodiment of the roller press according to the invention with an approximately horizontally arranged introduced into the Gutauftownschacht fines pressure screw, and
  • Fig. 2 a second embodiment of the roller press, wherein the pressure screw is arranged obliquely inclined to the horizontal.
  • 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 housings are supported by hydraulic cylinders, with which the roll pressing force is applied.
  • a Gutaufgabeschacht 12 which has on its upper side 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. and the slope top of this bulk material within the Gutaufgabeschachtes 12 is indicated by 15.
  • 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.
  • the grain size of the introduced fines 19 z. B. up to 100% ⁇ 3 mm, which is the case when introducing z. From fine recirculated classifier gullies, fly ash, blastfurnace slag, slag meal etc.
  • the nozzle at the outlet of the pressure screw 17 for introducing the fine material fraction 19 is a flat nozzle 20 arranged parallel to the latter located within the Gutbettschüt- 15 above this narrowest nip.
  • This flat nozzle 20 may be articulated via a hinge 21 to the mouth of the pressure screw 17 ,
  • the nozzle 20 of the pressure screw 19 in the pressure center of the Guteinzugs Reifenes the press nip on all sides of the roll gap in the remaining coarse grain fraction 15 concluded, thereby segregation of the two streams in the narrowest nip, in which in the Gutbettzerklein ceremonies the comparatively high roll pressure in the Good bulk material is effective, are avoided.
  • the pressure worm 17 lying transversely to the nip is inserted obliquely to the horizontal into the material feed chute 12 of the roller press, that is to say in FIG. H. 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 the assembly and disassembly of the roller 10 is not hindered by the pressure screw 17.
  • the pressing force on the material of the rolls 10, 11 of the roll press is 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 feed material in the narrowest nip is comminuted by a combined single-grain size reduction and Gutbettzer-monyung.
  • 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, the sifter 19 being recirculated to the pressure screw 17 and thence to the narrowest nip of the roller press.

Landscapes

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

Abstract

In order to provide a roller press which is used in particular for interparticle crushing and in the material feed shaft (12) of which both coarse-grained material (14), such as fresh material for example, and fine-grained material (19), such as, for example, recirculated grits of a downstream classifier and/or, for example, fly ash, are introduced, wherein, despite the markedly different grain size and grain distribution in the two material flows to be drawn into the roller gap, the stability of the particle bed or grinding bed and thus a high grinding efficiency are ensured, it is proposed according to the invention that a pressure screw (17) conveying the fine material under applied pressure be inserted into the material feed shaft (12) through the at least one fine-grain charging opening (16) of the latter, the nozzle-like orifice (20) of which pressure screw (17), in particular a flat nozzle, extends right into the central region in which the material is drawn into the pressing roller gap.

Description

Rollenpresse insbesondere zur Gutbettzerkleinerung Roller press especially for comminution
B E S C H R E I B U N GDESCRIPTION
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 Eintragsöffnung 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 good, with a arranged above the nip Gutaufgabeschacht with an entry opening for the introduction of coarse material and with a Opening for the introduction of fine material such. B. the recirculated greens 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 an- getriebenen 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-driven 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 ei- ne 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 Korn- große 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 one of the roll press optionally over a ne fine mill downstream classifier can be recycled, so 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 to roll 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. Frisch- gutes 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 proposed, 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. For example, recirculated sifter scale, blastfurnace slag, etc. can be introduced separately from each other and precompressed the fines in the material feed chute by a separate pre-compression roller in order to approximate the porosity of the fines to the porosity of the coarse material or fresh good and the feed condition of the fresh material and pre-compacted fines existing Gutmateriales in the nip of the 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.When Gutbettzerkleinerungs roller press of DE-38 23 929 A1 also three rollers are used in a machine frame, namely a driven main roll, at its upper portion 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.In addition, from DE-C 38 02 173 for pressing fine-grained salts, a roller press is known, above the nip of which several filling shafts are arranged side by side, in each of which a filling screw is located, d. H. 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.
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 bei- den in den Walzenspalt einzuziehenden Stoffströmen die Stabilität des Gutbettes bzw. Mahlbettes und damit ein hoher Mahlwirkungs- grad 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 are introduced, despite the significantly different particle size and particle size distribution in the two to be recovered in the nip flows the stability of the bed of material or grinding bed and thus a high Mahlwirkungs- degree 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. 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. Dabei wird in der Hochdruckzone des Walzenspaltes das Feinkornmaterial vom Grobkornmaterial umschlossen, wodurch die Gefahr einer Entmischung beider Stoffströme im Gutaufgabeschacht und einer wech- selnden Zufuhr von grobem und feinem Material in den Walzenspalt minimiert ist. Dies gelingt besonders gut dann, wenn die Düse der Druckschnecke zur Einführung des Feingutmaterials eine oberhalb des engsten Walzenspaltes angeordnete parallel zu diesem liegende Flachdüse ist.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. 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 introduced into the latter according to the invention, the nozzle-like orifice of which extends into the central region of the product feed of the press nip of the roll press. In the high-pressure zone of the nip, the fine-grained material is enclosed by the coarse-grained material, whereby the risk of segregation of the two streams in the crop hopper and a changing supply of coarse and fine material into the nip is minimized. This succeeds particularly well when the nozzle of the pressure screw for introducing the fine material is arranged above the narrowest nip parallel to this flat nozzle.
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 ein 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 Gutaufgabeschacht horizontally or obliquely to the horizontal lying hinged via a hinge 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 an- hand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert. Es zeigt:The invention and its further features and advantages will be explained in more detail with reference to the exemplary embodiments illustrated in the drawing. It shows:
Fig. 1 : eine erste Ausführungsform der erfindungsgemäßen Walzenpresse mit einer etwa horizontal angeordneten in den Gutaufgabeschacht eingeführten Feingut-Druckschnecke, undFig. 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: eine zweite Ausführungsform der Walzenpresse, bei welcher die Druckschnecke schräg zur Horizontalen geneigt angeordnet ist.Fig. 2: a second embodiment of the roller 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 aufgebracht wird.According 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 housings are supported by hydraulic cylinders, with which the roll pressing force is applied.
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, Flug- asche, Hüttensand, Schlackenmehl etc..Above the nip a Gutaufgabeschacht 12 is arranged, which has on its upper side 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., 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. From fine recirculated classifier gullies, 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 Gutbettschüt- tung 15 angeordnete Flachdüse 20. Diese Flachdüse 20 kann über ein Gelenk 21 an die Ausmündung der Druckschnecke 17 angelenkt sein. Jedenfalls ist die Düse 20 der Druckschnecke 19 im Druckzentrum des Guteinzugsbereiches des Presswalzenspaltes allseitig von der im Walzenspalt im übrigen befindlichen Grobkornfraktion 15 um- schlössen, wodurch Entmischungen der beiden Stoffströme im Bereich des engsten Walzenspaltes, in welchem bei der Gutbettzerkleinerung der vergleichsweise hohe Walzenpressdruck in der Gutmate- rialschüttung wirksam wird, vermieden sind.The nozzle at the outlet of the pressure screw 17 for introducing the fine material fraction 19 is a flat nozzle 20 arranged parallel to the latter located within the Gutbettschüt- 15 above this narrowest nip. This flat nozzle 20 may be 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 pressure center of the Guteinzugsbereiches the press nip on all sides of the roll gap in the remaining coarse grain fraction 15 concluded, thereby segregation of the two streams in the narrowest nip, in which in the Gutbettzerkleinerung the comparatively high roll pressure in the Good bulk material is effective, 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. Die- se 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, in the exemplary embodiment of FIG. 2, the pressure worm 17 lying transversely to the nip is inserted obliquely to the horizontal into the material feed chute 12 of the roller press, that is to say in FIG. H. 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 the assembly and disassembly of the roller 10 is not hindered by the pressure screw 17.
Bei allen Ausführungsbeispielen beträgt 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 Gutbettzer- kleinerung 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 Einrich- tung 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 is 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 feed material in the narrowest nip is comminuted by a combined single-grain size reduction and Gutbettzer- kleinerung. 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, the sifter 19 being recirculated to the pressure screw 17 and thence to the narrowest nip of the roller press.

Claims

A N S P R Ü C H E
1. Walzenpresse mit zwei drehbar gelagerten gegenläufig angetriebenen und durch einen Presswalzenspalt voneinander getrennten Walzen (10, 11 ) zur Druckbehandlung, insbesondere zur Gutbettzerkleinerung oder Kompaktierung bzw. Brikettierung körnigen Gutes, mit einem oberhalb des Walzenspaltes angeordneten Gutaufgabeschacht (12) mit einer Eintragsöffnung (13) für die Einführung von Grobgutmaterial und mit einer Eintragsöffnung (16) für die Einführung von Feingutmaterial wie z. B. die rezirkulierten Grieße einer im Kreislauf geschalteten Sichtereinrichtung, dadurch gekennzeichnet, dass durch die wenigstens eine Feingut- Eintragsöffnung (16) des Gutaufgabeschachtes (12) in diesen eine das Feingut unter Pressdruck fördernde Druckschnecke (17) eingeführt ist, deren düsenartige Ausmündung (20) bis in den zentralen Bereich des Guteinzuges des Presswalzenspaltes reicht.1. roller press with two rotatably mounted counter-driven and separated by a press nip rollers (10, 11) for pressure treatment, in particular for Gutbettzerkleinerung or compaction or briquetting granular material, with a above the nip arranged Gutaufgabeschacht (12) with an entry port (13 ) for the introduction of coarse material and with an entry opening (16) for the introduction of fines material such. B. the recirculated grues a circulating classifier, characterized in that by the at least one fine material inlet opening (16) of the material feed chute (12) in this a fine material under pressure pressure conveying screw (17) is introduced whose nozzle-like orifice (20 ) extends into the central region of the Guteinzuges the press nip.
2. Walzenpresse nach Anspruch 1 , dadurch gekennzeichnet, dass die Düse der Druckschnecke (17) zur Einführung der Feingutfraktion (19) eine oberhalb des engsten Walzenspaltes angeordnete parallel zu diesem liegende Flachdüse (20) ist.2. Roll press according to claim 1, characterized in that the nozzle of the pressure screw (17) for introducing the fine material fraction (19) is arranged above the narrowest nip parallel to this flat nozzle (20).
3. Walzenpresse nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass die Druckschnecke (17) quer zum Walzenspalt von der Seite in den Gutaufgabeschacht (12) horizontal oder schräg zur Horizontalen liegend eingeführt ist. 3. Roll press according to claims 1 or 2, characterized in that the pressure screw (17) transversely to the nip from the side in the Gutaufgabeschacht (12) horizontally or obliquely to the horizontal is introduced.
4. Walzenpresse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Düse (20) der Druckschnecke (17) über ein Gelenk (21) an die Ausmündung der Druckschnecke ange- lenkt ist.4. Roll press according to one of claims 1 to 3, characterized in that the nozzle (20) of the pressure screw (17) via a hinge (21) is hinged to the mouth of the pressure screw.
5. Walzenpresse nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Düse (20) der Druckschnecke (17) im Druckzentrum des Guteinzugsbereiches des Presswalzenspaltes allseitig von der im Walzenspalt befindlichen Grobgutfraktion (15) umschlossen ist.5. Roll press according to one or more of claims 1 to 4, characterized in that the nozzle (20) of the pressure screw (17) in the center of Guteinzugsbereiches the press nip is surrounded on all sides by the coarse material fraction located in the nip (15).
6. Walzenpresse nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, dass die Korngröße der mit der Druckschnecke (17) zu fördernden Feingutfraktion bis zu 100 % < 3 mm beträgt. 6. Roll press according to claims 1 to 5, characterized in that the grain size of the pressure screw (17) to be conveyed fine material fraction 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)

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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

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

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EP (1) EP2024091B1 (en)
CN (1) CN101460247A (en)
CA (1) CA2653065A1 (en)
DE (1) DE102006025833A1 (en)
DK (1) DK2024091T3 (en)
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DE102006025833A1 (en) 2007-12-06
CN101460247A (en) 2009-06-17
CA2653065A1 (en) 2007-12-13
US20090236455A1 (en) 2009-09-24
WO2007140929A1 (en) 2007-12-13
EP2024091B1 (en) 2012-12-12
DK2024091T3 (en) 2013-03-25
RU2008144301A (en) 2010-07-20

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