EP0801986A1 - Closed circuit grinding plant with a high-pressure roller press - Google Patents

Closed circuit grinding plant with a high-pressure roller press Download PDF

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Publication number
EP0801986A1
EP0801986A1 EP97104557A EP97104557A EP0801986A1 EP 0801986 A1 EP0801986 A1 EP 0801986A1 EP 97104557 A EP97104557 A EP 97104557A EP 97104557 A EP97104557 A EP 97104557A EP 0801986 A1 EP0801986 A1 EP 0801986A1
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EP
European Patent Office
Prior art keywords
feed
nip
grinding plant
circular grinding
discharge
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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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Application number
EP97104557A
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German (de)
French (fr)
Inventor
Siegfried Strasser
Albert Süssegger
Peter Kranz
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Deutz AG
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Deutz AG
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Application filed by Deutz AG filed Critical Deutz AG
Publication of EP0801986A1 publication Critical patent/EP0801986A1/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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a circular grinding plant with a high-pressure roller press for pressure comminution of granular material, with a material feed to the nip formed between the two rollers and with a recirculation of ground material for material input.
  • the high-pressure pressure in the regrind partly leads to particle destruction, partly to the creation of cracks in the interior of the particle and manifests itself visibly in the formation of agglomerates (so-called Schülpen), which can be disagglomerated or dissolved with comparatively little energy expenditure, so that this type of comminution overall is characterized by a comparatively low specific energy requirement.
  • Schülpen agglomerates
  • the invention is therefore based on the object of creating a high-pressure roller press for pressure comminution or material bed comminution of granular material with regrind recirculation, in which the mechanical and operating costs associated with the regrind recirculation for the transport of the circulating good material are considerably reduced.
  • the high-pressure roller press for comminuting granular good material, which is switched on in a circuit grinding with regrind recirculation, that the feed is not arranged above but below the roller gap, and that the direction of rotation of the counter-rotating rollers is such that the feed material is not as before from top to bottom but conversely, it is pushed through the roller gap from bottom to top and is transported from bottom to top through a material discharge or conveying shaft arranged above the roller gap.
  • a circular grinding can be represented, in which the transport of the material in circulation by the high-pressure roller press itself is accomplished.
  • the high-pressure roller press is not only used as a grinding element, but also as a conveying element, so that own transport devices for recirculating the possibly high amounts of circulating material are largely eliminated.
  • the material feed arranged below the nip has a mechanical material feed device, e.g. B. conveyor pressure screws, which press the feed material, namely fresh material plus recirculated good material from the bottom upwards into the nip until the good material is reliably drawn into the nip by the rotating rollers. It would also be possible not to arrange the two rollers of the roller press next to one another in a horizontal plane, but to arrange them in a plane inclined to the horizontal, and thereby to feed the feed obliquely from the side below the higher roller z. B. by means of a vibrating trough to feed the nip from below in order to make it even easier for the material to be drawn into the nip from below.
  • a mechanical material feed device e.g. B. conveyor pressure screws, which press the feed material, namely fresh material plus recirculated good material from the bottom upwards into the nip until the good material is reliably drawn into the nip by the rotating rollers.
  • Fig. 1 shows schematically a circuit grinding plant with a high-pressure roller press for comminution of granular material, the roller press 10 having two rotatably mounted counter-rotating rollers 11, 12, which form a nip between them and of which one roller as a fixed roller and the other roller is usually designed as a loose roller, by pressing the roller pressure is applied.
  • the fresh material 13 to be ground is brought together with recirculated press discharge material 14 and / or with semolina 15 of a classifier 16 connected downstream of the roller press 10 via a transport element 17, which in the exemplary embodiment can consist of a belt conveyor, to the material feed 18 of the roller press 10, this material load 18 is typically arranged below the nip.
  • the good feed 18 has a mechanical good material positive feed device such as. B. at least one conveyor pressure screw 19, which is driven by a motor 20.
  • the direction of rotation 21 of the oppositely driven rollers 11, 12 is such that the feed material is pressed through the nip from bottom to top and is transported from bottom to top through a material discharge or conveying shaft 22 arranged above the roller gap, which is loaded with press material or Schülpenmaterial 23 is filled out.
  • the high-pressure material bed comminution high-pressure roller press 10 is used both as a grinding element and as a conveying element for transporting the large quantities of material that may be in circulation.
  • a partial stream 14 of the press material to be discharged and / or the coarse material 15 of the downstream sifter 16 to the good object 18 is recirculated into the material feed 18 arranged below the nip 18 and diverted from the material discharge or conveying shaft 22.
  • the fine material drawn off from the classifier 16 is indicated by 24, while the quantity of good part to be used, which can be discharged from the grinding circuit, is indicated by 25.
  • a material material lock in particular a speed-controllable cellular wheel lock 27 is arranged in the region of the branch, by means of which the recirculated material part quantity can be adjusted.
  • this discharge point of the recirculated slugs 14 is arranged as a product overflow 29 arranged in the conveyor shaft 22 formed, which lies above the material material branch equipped with a controllable conveying element 28 such as a screw conveyor, trough chain conveyor, dosing belt scale etc.
  • the controllable conveying element 28 feeds a controlled material flow for further grinding 25 and / or the classifier 16, and the remaining pressed material 14 is recirculated to the roller press 10 via the overflow 29.

Abstract

The mill has two horizontal axis rollers (12) rotating to push the milled material upwards into a vertical output shaft (22). Some of the milled material is passed back from the top of the shaft to join the fresh feed (16,17) back into the hopper. The material is fed up from the hopper to the rollers by a screw feed (18). Another duct (26) near the top of the vertical output duct taps off some of the milled flow back into the hopper. This recirculation flow is controlled by a valve (27) in the duct.

Description

Die Erfindung betrifft eine Kreislaufmahlanlage mit einer Hochdruck-Walzenpresse zur Druckzerkleinerung körnigen Gutmateriales, mit einer Gutaufgabe zum zwischen den beiden Walzen gebildeten Walzenspalt und mit einer Rezirkulierung von gemahlenem Gut zur Gutaufgabe.The invention relates to a circular grinding plant with a high-pressure roller press for pressure comminution of granular material, with a material feed to the nip formed between the two rollers and with a recirculation of ground material for material input.

Bei der bisher bekannten Druckzerkleinerung körnigen Mahlgutes im Spalt einer Hochdruck-Walzenpresse (EP-B-0 084 383 sowie Broschüre 2-300 d "Rollenpressen" der KHD Humboldt Wedag AG insbesondere Seite 5) wird das Mahlgut dem Walzenspalt über einen oberhalb des Walzenspalts angeordneten Gutaufgabeschacht zugeführt, und das Aufgabegut muß von den gegenläufig angetriebenen Walzen erfaßt und durch Reibung in den Walzenspalt eingezogen werden. Dabei werden die einzelnen Partikel des in den Walzenspalt eingezogenen Mahlgutes in einem Gutbett, d. h. in einer zwischen den beiden Walzenoberflächen zusammengedrückten Materialschüttung bei Anwendung eines hohen Druckes gegenseitig zerquetscht, so daß man hierbei von der sogenannten Gutbettzerkleinerung spricht. Die Hochdruckpressung führt im Mahlgut teils zur Partikelzerstörung, teils zur Erzeugung von Anrissen im Partikelinneren und äußert sich sichtbar in der Bildung von Agglomeraten (sogenannten Schülpen), die sich mit vergleichsweise geringem Energieaufwand desagglomerieren bzw. auflösen lassen, so daß diese Art der Zerkleinerung insgesamt durch einen vergleichsweise niedrigen spezifischen Energiebedarf gekennzeichnet ist.In the previously known pressure comminution of granular regrind in the nip of a high-pressure roller press (EP-B-0 084 383 and brochure 2-300 d "roller presses" from KHD Humboldt Wedag AG, in particular page 5), the regrind is arranged in the nip above one above the nip The feed chute is fed in, and the feed must be gripped by the oppositely driven rollers and drawn into the nip by friction. The individual particles of the ground material drawn into the nip are crushed in a bed of material, ie in a bed of material compressed between the two roller surfaces when a high pressure is applied, so that one speaks of the so-called bed size reduction. The high-pressure pressure in the regrind partly leads to particle destruction, partly to the creation of cracks in the interior of the particle and manifests itself visibly in the formation of agglomerates (so-called Schülpen), which can be disagglomerated or dissolved with comparatively little energy expenditure, so that this type of comminution overall is characterized by a comparatively low specific energy requirement.

Es ist auch bekannt, in den Gutaufgabeschacht der Hochdruck-Walzenpresse einen Teilstrom des Pressenaustragsgutes (Schülpenmaterial) und/oder die Grobfraktion (Grieße) eines nachgeschalteten Sichters zu rezirkulieren, wodurch es zu einer Kreislaufmahlung mit ggf. hohen im Kreislauf umlaufenden Gutmaterialmengen kommt. So sind bei einer solchen Kreislaufmahlung Umlaufzahlen zwischen 2,0 und mehr als 8,0 ohne weiteres möglich, d. h., die im Kreislauf umlaufende Gutmaterialmenge beträgt ein Vielfaches der zu zerkleinernden Frischgutmenge. Während das rezirkulierte Schülpenmaterial in der Regel mittels Becherwerken vom Pressenaustrag zum Gutaufgabeschacht der Hochdruck-Walzenpresse transportiert werden muß, erfolgt der Transport rezirkulierter Sichtergrieße zum Gutaufgabeschacht der Walzenpresse oft mittels pneumatischen Transporteinrichtungen. Es versteht sich, daß in jedem Fall hohe Gutmaterial-Kreislaufraten einen entsprechend hohen Aufwand an Investitions- und Betriebskosten für den Transport der im Kreislauf geführten Materialmengen erforderlich machen.It is also known to recirculate a partial flow of the press discharge material (Schülpen material) and / or the coarse fraction (grit) of a downstream classifier in the feed chute of the high-pressure roller press, which results in a cycle grinding with possibly high amounts of good material circulating in the cycle. In such a cycle grinding, numbers between 2.0 and more than 8.0 are easily possible, i. that is, the quantity of good material circulating in the cycle is a multiple of the quantity of fresh material to be shredded. While the recirculated slag material usually has to be transported from the press discharge to the feed chute of the high-pressure roller press by means of bucket elevators, the recirculated sifter size is often transported to the feed chute of the roller press by means of pneumatic transport devices. It goes without saying that, in any case, high material material circulation rates require a correspondingly high investment and operating cost for the transport of the quantities of material carried in the circuit.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Hochdruck-Walzenpresse zur Druckzerkleinerung bzw. Gutbettzerkleinerung körnigen Gutes mit Mahlgutrezirkulierung zu schaffen, bei welcher der mit der Mahlgutrezirkulierung verbundene maschinelle und betriebskostenmäßige Aufwand zum Transport des Umlauf-Gutmateriales erheblich reduziert ist.The invention is therefore based on the object of creating a high-pressure roller press for pressure comminution or material bed comminution of granular material with regrind recirculation, in which the mechanical and operating costs associated with the regrind recirculation for the transport of the circulating good material are considerably reduced.

Diese Aufgabe wird gemäß der Erfindung mit den Maßnahmen des Kennzeichnungsteils des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.This object is achieved according to the invention with the measures of the characterizing part of claim 1. Advantageous refinements are specified in the subclaims.

Charakteristisch für die erfindungsgemäße, in eine Kreislaufmahlung mit Mahlgutrezirkulierung eingeschaltete Hochdruck-Walzenpresse zur Druckzerkleinerung körnigen Gutmateriales ist, daß die Gutaufgabe nicht oberhalb, sondern unterhalb des Walzenspaltes angeordnet ist, und daß die Drehrichtung der gegenläufig angetriebenen Walzen so ist, daß das Aufgabegut nicht wie bisher von oben nach unten, sondern umgekehrt von unten nach oben durch den Walzenspalt hindurchgedrückt und von unten nach oben durch einen oberhalb des Walzenspaltes angeordneten Gutaustrags- bzw. Förderschacht transportiert wird. Auf diese Weise läßt sich eine Kreislaufmahlung darstellen, bei welcher der Transport des Gutumlaufmateriales durch die Hochdruck-Walzenpresse selbst bewerkstelligt wird. D. h., die Hochdruck-Walzenpresse wird nicht nur als Mahlorgan, sondern auch als Förderorgan ausgenutzt, so daß eigene Transporteinrichtungen zur Rezirkulierung der ggf. hohen Umlaufmaterialmengen weitestgehend entfallen.It is characteristic of the high-pressure roller press for comminuting granular good material, which is switched on in a circuit grinding with regrind recirculation, that the feed is not arranged above but below the roller gap, and that the direction of rotation of the counter-rotating rollers is such that the feed material is not as before from top to bottom but conversely, it is pushed through the roller gap from bottom to top and is transported from bottom to top through a material discharge or conveying shaft arranged above the roller gap. In this way, a circular grinding can be represented, in which the transport of the material in circulation by the high-pressure roller press itself is accomplished. In other words, the high-pressure roller press is not only used as a grinding element, but also as a conveying element, so that own transport devices for recirculating the possibly high amounts of circulating material are largely eliminated.

Nach einem Merkmal der Erfindung weist die unterhalb des Walzenspaltes angeordnete Gutaufgabe eine mechanische Gutmaterial-Zwangszufuhreinrichtung auf, z. B. Förderdruckschnecken, welche das Aufgabegut, nämlich Frischgut plus rezirkuliertes Gutmaterial von unten nach oben in den Walzenspalt drücken, bis das Gutmaterial sicher von den rotierenden Walzen in den Walzenspalt eingezogen wird. Es wäre auch möglich, die beiden Walzen der Walzenpresse nicht in einer horizontalen Ebene nebeneinander anzuordnen, sondern in einer zur Horizontalen schräg geneigten Ebene anzuordnen und dabei das Aufgabegut schräg von der Seite unterhalb der höher gelegenen Walze z. B. mittels einer Vibrationsrinne dem Walzenspalt von unten zuzuführen, um den Einzug des Gutmateriales von unten in den Walzenspalt noch erleichtern zu können.According to a feature of the invention, the material feed arranged below the nip has a mechanical material feed device, e.g. B. conveyor pressure screws, which press the feed material, namely fresh material plus recirculated good material from the bottom upwards into the nip until the good material is reliably drawn into the nip by the rotating rollers. It would also be possible not to arrange the two rollers of the roller press next to one another in a horizontal plane, but to arrange them in a plane inclined to the horizontal, and thereby to feed the feed obliquely from the side below the higher roller z. B. by means of a vibrating trough to feed the nip from below in order to make it even easier for the material to be drawn into the nip from below.

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 explained in more detail with reference to the exemplary embodiments shown schematically in the figures.

Es zeigt:

Fig. 1:
eine Kreislaufmahlanlage mit Gutbettzerkleinerungs-Hochdruck-Walzenpresse und Sichter, und
Fig. 2:
eine Alternative eines Details der Anlage der Fig. 1.
It shows:
Fig. 1:
a circular grinding plant with high-pressure high-pressure roller press and classifier, and
Fig. 2:
an alternative of a detail of the system of FIG. 1.

Fig. 1 zeigt schematisch eine Kreislaufmahlanlage mit einer Hochdruck-Walzenpresse zur Gutbettzerkleinerung körnigen Gutes, wobei die Walzenpresse 10 zwei drehbar gelagerte gegenläufig rotierende Walzen 11, 12 aufweist, die zwischen sich einen Walzenspalt bilden und von denen die eine Walze als Festwalze und die andere Walze in der Regel als Loswalze ausgebildet ist, durch deren Anpressung der Walzenpreßdruck aufgebracht wird. Das zu mahlende Frischgut 13 wird zusammen mit rezirkuliertem Pressenaustragsgut 14 und/oder mit Grießen 15 eines der Walzenpresse 10 nachgeschalteten Sichters 16 über ein Transportorgan 17, welches im Ausführungsbeispiel aus einem Bandförderer bestehen kann, zur Gutaufgabe 18 der Walzenpresse 10 herangeführt, wobei diese Gutaufgabe 18 charakteristischer Weise unterhalb des Walzenspaltes angeordnet ist. Im zeichnerischen Ausführungsbeispiel weist die Gutaufgabe 18 eine mechanische Gutmaterial-Zwangszufuhreinrichtung wie z. B. wenigstens eine Förder-Druckschnecke 19 auf, die von einem Motor 20 angetrieben ist. Die Drehrichtung 21 der gegenläufig angetriebenen Walzen 11, 12 ist so, daß das Aufgabegut von unten nach oben durch den Walzenspalt hindurchgedrückt und von unten nach oben durch einen oberhalb des Walzenspaltes angeordneten Gutaustrags- bzw. Förderschacht 22 transportiert wird, der mit Pressenaustragsgut bzw. Schülpenmaterial 23 ausgefüllt ist. Auf diese Weise wird die Gutbettzerkleinerungs-Hochdruck-Walzenpresse 10 sowohl als Mahlorgan als auch als Förderorgan zum Transport der ggf. hohen Gutumlaufmaterialmengen ausgenutzt.Fig. 1 shows schematically a circuit grinding plant with a high-pressure roller press for comminution of granular material, the roller press 10 having two rotatably mounted counter-rotating rollers 11, 12, which form a nip between them and of which one roller as a fixed roller and the other roller is usually designed as a loose roller, by pressing the roller pressure is applied. The fresh material 13 to be ground is brought together with recirculated press discharge material 14 and / or with semolina 15 of a classifier 16 connected downstream of the roller press 10 via a transport element 17, which in the exemplary embodiment can consist of a belt conveyor, to the material feed 18 of the roller press 10, this material load 18 is typically arranged below the nip. In the illustrative embodiment, the good feed 18 has a mechanical good material positive feed device such as. B. at least one conveyor pressure screw 19, which is driven by a motor 20. The direction of rotation 21 of the oppositely driven rollers 11, 12 is such that the feed material is pressed through the nip from bottom to top and is transported from bottom to top through a material discharge or conveying shaft 22 arranged above the roller gap, which is loaded with press material or Schülpenmaterial 23 is filled out. In this way, the high-pressure material bed comminution high-pressure roller press 10 is used both as a grinding element and as a conveying element for transporting the large quantities of material that may be in circulation.

In die unterhalb des Walzenspaltes angeordnete Gutaufgabe 18 ist ein vom Gutaustrags- bzw. Förderschacht 22 abgezweigter Teilstrom 14 des Pressenaustragsgutes und/oder das Grobgut 15 des nachgeschalteten Sichters 16 zur Gutaufgabe 18 rezirkuliert. Mit 24 ist das vom Sichter 16 abgezogene Feingut angezeigt, während mit 25 eine einer Weiterverwendung zuzuführende Gutteilmenge angezeigt ist, welche aus dem Mahlkreislauf ausgeschleust werden kann.A partial stream 14 of the press material to be discharged and / or the coarse material 15 of the downstream sifter 16 to the good object 18 is recirculated into the material feed 18 arranged below the nip 18 and diverted from the material discharge or conveying shaft 22. The fine material drawn off from the classifier 16 is indicated by 24, while the quantity of good part to be used, which can be discharged from the grinding circuit, is indicated by 25.

In der Mahlgut-(Schülpen-)Rezirkulationsleitung 26 zur Rezirkulierung des Teilstromes 14 des Schülpenmateriales aus dem Gutaustrags- bzw. Förderschacht 22 ist im Bereich der Abzweigung eine Gutmaterialschleuse, insbesondere eine drehzahlregelbare Zellenradschleuse 27 angeordnet, mittels welcher die rezirkulierte Gutmaterialteilmenge eingestellt werden kann.In the regrind (Schülpen) recirculation line 26 for recirculating the partial flow 14 of the Schülpen material from the material discharge or delivery shaft 22, a material material lock, in particular a speed-controllable cellular wheel lock 27 is arranged in the region of the branch, by means of which the recirculated material part quantity can be adjusted.

Während beim Ausführungsbeispiel der Fig. 1 die Ausschleusungsstelle der rezirkulierten Schülpen 14 unterhalb der Gutmaterialsverzweigung zur Weiterverwendung 25 bzw. zum Sichter 16 angeordnet ist, ist beim als Detailausschnitt dargestellten Ausführungsbeispiel der Fig. 2 diese Ausschleusungsstelle der rezirkulierten Schülpen 14 als im Förderschacht 22 angeordneter Gutüberlauf 29 ausgebildet, der oberhalb der mit einem regelbaren Förderorgan 28 wie Förderschnecke, Trogkettenförderer, Dosierbandwaage etc. ausgestatteten Gutmaterialsverzweigung liegt. Das regelbare Förderorgan 28 führt einen kontrollierten Materialstrom zur Weitervermahlung 25 und/oder dem Sichter 16 zu, und das restliche gepreßte Material 14 wird über den Überlauf 29 zur Walzenpresse 10 rezirkuliert.While in the exemplary embodiment in FIG. 1 the discharge point of the recirculated slugs 14 is arranged below the good material branch for further use 25 or to the sifter 16, in the exemplary embodiment shown in detail in FIG. 2 this discharge point of the recirculated slugs 14 is arranged as a product overflow 29 arranged in the conveyor shaft 22 formed, which lies above the material material branch equipped with a controllable conveying element 28 such as a screw conveyor, trough chain conveyor, dosing belt scale etc. The controllable conveying element 28 feeds a controlled material flow for further grinding 25 and / or the classifier 16, and the remaining pressed material 14 is recirculated to the roller press 10 via the overflow 29.

Claims (5)

Kreislaufmahlanlage mit einer Hochdruck-Walzenpresse (10) zur Druckzerkleinerung körnigen Gutmateriales, mit einer Gutaufgabe zum zwischen den beiden Walzen (11, 12) gebildeten Walzenspalt und mit einer Rezirkulierung von gemahlenem Gut zur Gutaufgabe, gekennzeichnet durch folgende Merkmale: - die Gutaufgabe (18) ist unterhalb des Walzenspaltes angeordnet, und - die Drehrichtung (21) der gegenläufig angetriebenen Walzen (11, 12) ist so, daß das Aufgabegut von unten nach oben durch den Walzenspalt hindurchgedrückt und von unten nach oben durch einen oberhalb des Walzenspaltes angeordneten Gutaustrags- bzw. Förderschacht (22) transportiert wird. Circular grinding system with a high-pressure roller press (10) for pressure comminution of granular material, with a material feed to the roller gap formed between the two rollers (11, 12) and with a recirculation of ground material for material input, characterized by the following features: - The good job (18) is arranged below the nip, and - The direction of rotation (21) of the oppositely driven rollers (11, 12) is such that the feed material is pushed through the nip from bottom to top and transported from bottom to top through a material discharge or conveying shaft (22) arranged above the nip . Kreislaufmahlanlage nach Anspruch 1, dadurch gekennzeichnet, daß die unterhalb des Walzenspaltes angeordnete Gutaufgabe (18) eine mechanische Gutmaterial-Zwangszufuhreinrichtung wie z. B. Druckschnecken (19) aufweist.Circular grinding plant according to claim 1, characterized in that the material feed (18) arranged underneath the roller gap comprises a mechanical material feed device such as. B. pressure screws (19). Kreislaufmahlanlage nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß in die unterhalb des Walzenspaltes angeordnete Gutaufgabe (18) ein vom Gutaustrags- bzw. Förderschacht (22) abgezweigter Teilstrom (14) des Pressenaustragsgutes und/oder das Grobgut (Grieße) eines nachgeschalteten Sichters (16) zur Gutaufgabe (18) rezirkuliert ist.Circular grinding plant according to claims 1 or 2, characterized in that a partial stream (14) of the press discharge material and / or the coarse material (size) of a downstream sifter branched off from the material discharge or conveying shaft (22) into the material feed (18) arranged below the roller gap (16) is recirculated to the good task (18). Kreislaufmahlanlage nach Anspruch 3, dadurch gekennzeichnet, daß in der Mahlgut-(Schülpenmaterial-)Rezirkulationsleitung (26) aus dem Gutaustrags- bzw. Förderschacht (22) eine Gutmaterialschleuse, insbesondere eine drehzahlregelbare Zellenradschleuse (27) angeordnet ist.Circular grinding plant according to claim 3, characterized in that a material lock, in particular a speed-controllable cellular wheel lock (27), is arranged in the regrind line (26) from the material discharge or delivery shaft (22) in the regrind (flake material) recirculation line. Kreislaufmahlanlage nach Anspruch 3, dadurch gekennzeichnet, daß im Förderschacht (22) ein Gutüberlauf (29) und unterhalb davon ein regelbares Förderorgan (28) angeordnet ist, das einen kontrollierten Materialstrom zur Weiterverwendung (25) ausschleust und/oder dem Sichter (16) zuführt, während das restliche gepreßte Material (14) über den Überlauf (29) zur Walzenpresse (10) rezirkuliert wird.Circular grinding plant according to claim 3, characterized in that a material overflow (29) is arranged in the conveying shaft (22) and below it a controllable conveying member (28) which discharges a controlled material flow for further use (25) and / or feeds the sifter (16) while the remaining pressed material (14) is recirculated to the roller press (10) via the overflow (29).
EP97104557A 1996-04-19 1997-03-18 Closed circuit grinding plant with a high-pressure roller press Withdrawn EP0801986A1 (en)

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Application Number Priority Date Filing Date Title
DE1996115480 DE19615480A1 (en) 1996-04-19 1996-04-19 Circular grinding plant with a high pressure roller press
DE19615480 1996-04-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014191063A1 (en) * 2013-05-25 2014-12-04 Khd Humboldt Wedag Gmbh Closed-circuit crushing mill
CN113275113A (en) * 2021-05-27 2021-08-20 霍玉鹏 Gold ore processing grinds machine
CN116673088A (en) * 2023-07-05 2023-09-01 浙江恒亿达复合材料有限公司 Vacuum bag film production and processing device and process

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CN111589508B (en) * 2020-05-28 2021-11-09 百润实业(天津)有限公司 Paper making raw material straw multiple crushing mechanism
CN213557277U (en) * 2020-10-19 2021-06-29 江苏吉能达环境能源科技有限公司 Novel powder concentrator

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EP0084383A2 (en) * 1983-01-24 1983-07-27 Klöckner-Humboldt-Deutz Aktiengesellschaft Method for the continuous breaking up by compression of friable material
DE3525936A1 (en) * 1985-07-19 1987-01-29 Krupp Polysius Ag Method and system for dehydrating and comminuting material for milling with a high moisture content

Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2014191063A1 (en) * 2013-05-25 2014-12-04 Khd Humboldt Wedag Gmbh Closed-circuit crushing mill
EP3130402A1 (en) * 2013-05-25 2017-02-15 KHD Humboldt Wedag GmbH Closed-curcuit crushing mill
EP3130403A1 (en) * 2013-05-25 2017-02-15 KHD Humboldt Wedag GmbH Closed-curcuit crushing mill
CN113275113A (en) * 2021-05-27 2021-08-20 霍玉鹏 Gold ore processing grinds machine
CN116673088A (en) * 2023-07-05 2023-09-01 浙江恒亿达复合材料有限公司 Vacuum bag film production and processing device and process

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