EP0272485A2 - Method and installation for the two-stage crushing of brittle material - Google Patents

Method and installation for the two-stage crushing of brittle material Download PDF

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Publication number
EP0272485A2
EP0272485A2 EP87117376A EP87117376A EP0272485A2 EP 0272485 A2 EP0272485 A2 EP 0272485A2 EP 87117376 A EP87117376 A EP 87117376A EP 87117376 A EP87117376 A EP 87117376A EP 0272485 A2 EP0272485 A2 EP 0272485A2
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Prior art keywords
mill
semolina
roller mill
amount
fed
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EP87117376A
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German (de)
French (fr)
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EP0272485B1 (en
EP0272485A3 (en
Inventor
Gotthardt Dipl.-Ing. Blasczyk
Norbert Dipl.-Ing. Patzelt
Heinz-Georg Dipl-Ing. Mersmann
Hardy Dipl-Ing. Kropf
Franz Josef Dipl.-Ing. Adrian
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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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
    • B02C4/42—Driving mechanisms; Roller speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the invention relates to a method (according to the preamble of claim 1) and a system (according to the preamble of claim 4) for the two-stage comminution of brittle regrind.
  • the invention has for its object to provide a method according to the preamble of claim 1 and a system according to the preamble of claim 4 that results in the overall system as high as possible energy savings or the least possible specific work required for crushing the ground material.
  • the system shown for the two-stage comminution of brittle ground material for example cement clinker, contains a roller mill 1 and a second mill 2 connected downstream of the roller mill 1, which is preferably designed as a ball mill.
  • the system also contains a classifier 3 for classifying the material discharged from the second mill 2.
  • a measuring device 4 is provided for determining the amount of semolina produced during the screening.
  • a control flap 6 provided with a motor 5, which serves to divide the amount of semolina produced during the screening into a partial flow fed to the roller mill 1 and a partial flow fed to the second mill 2.
  • the regrind to be comminuted is located in storage containers 7, 8, 9 (which are assigned to individual components, for example). It is fed to the roller mill 1 via metering belt scales 10, 11, 12.
  • the roller mill 1 contains 2 rollers 13, 14, de NEN the roller 13 is designed as a fixed roller and the roller 14 as a loose roller.
  • the two rollers pressed against each other at high pressure are driven by electric motors 15, 16 via gears 17, 18.
  • the measuring device 4 which determines the total amount of semolina produced during the sifting, is connected to a controller 22, which receives a signal from a summing element 23 which corresponds to the amount of fresh material just supplied (ie the sum of the withdrawals from the storage containers 7, 8, 9) Amount of regrind).
  • the controller 22 is connected to the drives of the dosing belt scales 10, 11, 12 via a switching element 24.
  • a second control circuit contains a measuring device 19 for determining the quantity of semolina fed to the roller mill 1, a computing element 20 and a regulator 21.
  • the first regulator 20 is supplied with a signal by the summing element 23 which corresponds to the current quantity of fresh material. He also receives a predetermined target value (26) for the sum of the quantity of fresh material and the quantity of semolina returned to the roller mill. From this, the computing element 20 forms a target value for the quantity of semolina returned to the roller mill. This setpoint is fed to the second controller 21.
  • the controller 21 receives a signal from the measuring device 19, which corresponds to the quantity of semolina returned to the roller mill 1. From this, the controller 21 forms a control signal which is fed to the servomotor 5 of the control flap 6.
  • the system also contains a device 25, which is likewise connected to the switching element 24, for monitoring the fill level of the second mill 2.
  • the regrind fed to the roller mill 1 is comminuted in the nip of the roller mill and, if the grain size is appropriate, is also comminuted individually.
  • the agglomerates resulting from the comminution of the material bed are dissolved in the second mill 2. If necessary, the ground material in the second mill 2 undergoes further comminution.
  • the material discharged from the mill 2 is sighted in the sifter 3.
  • a partial flow of the roller mill 1 and a further partial flow of the mill 2 are fed from the resulting amount of semolina via the control flap 6.
  • the quantity of fresh material fed to the roller mill 1 via the metering belt scales 10, 11, 12 is dependent on the total amount of semolina obtained during the screening is regulated in such a way that the sum of the quantity of fresh material and the total amount of semolina of the mill 2 remains constant.
  • the amount of semolina obtained during the screening is divided between the partial streams fed to the roller mill 1 and the second mill 2 in such a way that the total amount of fresh material and the amount of semolina fed to the roller mill remains constant.
  • the roller mill 1 is therefore operated with a constant amount of material per unit time (t / h).
  • the roller mill 1 expediently runs at a constant speed.
  • the device 25 sends a signal to the switching element 24 and interrupts the above-described regulation of the quantity of fresh material depending on the total amount of semolina (ie the first control circuit) until the fill level of the mill 2 normalized again.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

Die Erfindung betrifft ein Verfahren sowie eine Anlage zur zweistufigen Zerkleinerung von sprödem Mahlgut unter Verwendung einer Walzenmühle (1) und einer nachgeschalteten Mühle (2). Die bei der Sichtung anfallende Grießmenge wird hierbei zwischen Walzenmühle (1) und nachgeschalteter Mühle (2) so aufgeteilt, daß die Summe von Frischgutmenge und der Walzenmühle zugeführter Grießmenge konstant bleibt.The invention relates to a method and a plant for the two-stage comminution of brittle regrind using a roller mill (1) and a downstream mill (2). The amount of semolina obtained during the screening is divided between the roller mill (1) and the downstream mill (2) so that the sum of the quantity of fresh material and the amount of semolina fed to the roller mill remains constant.

Description

Die Erfindung betrifft ein Verfahren (entspre­chend dem Oberbegriff des Anspruches 1) sowie eine Anlage (gemäß dem Gattungsbegriff des An­spruches 4) zur zweistufigen Zerkleinerung von sprödem Mahlgut.The invention relates to a method (according to the preamble of claim 1) and a system (according to the preamble of claim 4) for the two-stage comminution of brittle regrind.

Ein Verfahren sowie eine Anlage dieser Art sind Gegenstand der deutschen Patentanmeldung P 35 20 069.3. Bei dieser älteren Lösung wird der der Walzenmühle zugeführte Teilstrom der Grießmenge so bemessen, daß im Füllschacht der Walzenmühle auch bei wechselnder Frischgutmenge ein nahezu konstanter Füllstand aufrechterhalten wird.A method and an installation of this type are the subject of German patent application P 35 20 069.3. In this older solution, the partial flow of the semolina quantity fed to the roller mill is dimensioned such that an almost constant fill level is maintained in the filling shaft of the roller mill even with changing quantities of fresh material.

Der Erfindung liegt die Aufgabe zugrunde, ein Ver­fahren entsprechend dem Oberbegriff des Anspruches 1 sowie eine Anlage gemäß dem Gattungsbegriff des Anspruches 4 so auszubilden, daß sich im Gesamt­system eine möglichst hohe Energieeinsparung bzw. ein möglichst geringer spezifischer Arbeitsbedarf für die Zerkleinerung des Mahlgutes ergibt.The invention has for its object to provide a method according to the preamble of claim 1 and a system according to the preamble of claim 4 that results in the overall system as high as possible energy savings or the least possible specific work required for crushing the ground material.

Diese Aufgabe wird erfindungsgemäß durch die kenn­zeichnenden Merkmale des Anspruches 1 bzw. Anspru­ches 4 gelöst.This object is achieved by the characterizing features of claim 1 and claim 4.

Zweckmäßige Ausgestaltungen sind Gegenstand der Un­ teransprüche.Appropriate configurations are the subject of the Un claims.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch veranschaulicht.An embodiment of the invention is illustrated schematically in the drawing.

Die dargestellte Anlage zur zweistufigen Zerklei­nerung von sprödem Mahlgut, beispielsweise von Zementklinker, enthält eine Walzenmühle 1 und eine der Walzenmühle 1 nachgeschaltete zweite Mühle 2, die vorzugsweise als Kugelmühle ausge­bildet ist.The system shown for the two-stage comminution of brittle ground material, for example cement clinker, contains a roller mill 1 and a second mill 2 connected downstream of the roller mill 1, which is preferably designed as a ball mill.

Die Anlage enthält ferner einen Sichter 3 zur Sichtung des aus der zweiten Mühle 2 ausgetrage­nen Gutes.The system also contains a classifier 3 for classifying the material discharged from the second mill 2.

Weiterhin ist eine Meßeinrichtung 4 zur Ermitt­lung der bei der Sichtung anfallenden Grießmenge vorgesehen. An diese Meßeinrichtung 4 schließt sich eine mit einem Motor 5 versehene Stellklappe 6 an, die dazu dient, die bei der Sichtung ange­fallene Grießmenge in einen der Walzenmühle 1 zu­geführten Teilstrom und einen der zweiten Mühle 2 zugeführten Teilstrom zu unterteilen.Furthermore, a measuring device 4 is provided for determining the amount of semolina produced during the screening. Connected to this measuring device 4 is a control flap 6 provided with a motor 5, which serves to divide the amount of semolina produced during the screening into a partial flow fed to the roller mill 1 and a partial flow fed to the second mill 2.

Das zu zerkleinernde Mahlgut befindet sich in Vor­ratsbehältern 7, 8, 9 (die beispielsweise einzel­nen Komponenten zugeordnet sind). Es wird über Dosierbandwaagen 10, 11, 12 der Walzenmühle 1 zu­geführt.The regrind to be comminuted is located in storage containers 7, 8, 9 (which are assigned to individual components, for example). It is fed to the roller mill 1 via metering belt scales 10, 11, 12.

Die Walzenmühle 1 enthält 2 Walzen 13, 14, von de­ nen die Walze 13 als Festwalze und die Walze 14 als Loswalze ausgebildet ist. Die beiden mit ho­hem Druck gegeneinander gepreßten Walzen werden durch Elektromotoren 15, 16 über Getriebe 17, 18 angetrieben.The roller mill 1 contains 2 rollers 13, 14, de NEN the roller 13 is designed as a fixed roller and the roller 14 as a loose roller. The two rollers pressed against each other at high pressure are driven by electric motors 15, 16 via gears 17, 18.

Die Meßeinrichtung 4, die die bei der Sichtung anfallende gesamte Grießmenge ermittelt, ist mit einem Regler 22 verbunden, der von einem Summierglied 23 ein Signal erhält, das der ge­rade zugeführten Frischgutmenge entspricht (d.h. der Summe der aus den Vorratsbehältern 7,8, 9 abgezogenen Mahlgutmenge). Der Regler 22 ist über ein Umschaltglied 24 mit den Antrieben der Dosierbandwaagen 10, 11, 12 verbunden.The measuring device 4, which determines the total amount of semolina produced during the sifting, is connected to a controller 22, which receives a signal from a summing element 23 which corresponds to the amount of fresh material just supplied (ie the sum of the withdrawals from the storage containers 7, 8, 9) Amount of regrind). The controller 22 is connected to the drives of the dosing belt scales 10, 11, 12 via a switching element 24.

Ein zweiter Regelkreis enthält eine Meßeinrich­tung 19 zur Ermittlung der der Walzenmühle 1 zu­geführten Grießmenge, ein Rechenglied 20 so­wie einen Regler 21. Dem ersten Regler 20 wird vom Summierglied 23 ein Signal zugeführt, das der derzeitigen Frischgutmenge entspricht. Er erhält ferner einen vorgegebenen Sollwert(26) für die Summe von Frischgutmenge und zur Walzenmühle rück­geführter Grießmenge. Hieraus bildet das Rechenglied 20 einen Sollwert für die zur Walzenmüh­le rückgeführte Grießmenge. Dieser Sollwert wird dem zweiten Regler 21 zugeleitet.A second control circuit contains a measuring device 19 for determining the quantity of semolina fed to the roller mill 1, a computing element 20 and a regulator 21. The first regulator 20 is supplied with a signal by the summing element 23 which corresponds to the current quantity of fresh material. He also receives a predetermined target value (26) for the sum of the quantity of fresh material and the quantity of semolina returned to the roller mill. From this, the computing element 20 forms a target value for the quantity of semolina returned to the roller mill. This setpoint is fed to the second controller 21.

Der Regler 21 erhält außer diesem vom Re­chenglied 20 gebildeten Sollwert ein Signal von der Meßeinrichtung 19, das der zur Walzenmühle 1 rückgeführten Grießmenge entspricht. Hieraus bil­det der Regler 21 ein Regelsignal, das dem Stellmotor 5 der Stellklappe 6 zugeführt wird.In addition to this setpoint formed by the computing element 20, the controller 21 receives a signal from the measuring device 19, which corresponds to the quantity of semolina returned to the roller mill 1. From this, the controller 21 forms a control signal which is fed to the servomotor 5 of the control flap 6.

Schließlich enthält die Anlage noch eine gleich­falls mit dem Umschaltglied 24 verbundene Einrich­tung 25 zur Überwachung des Füllstandes der zwei­ten Mühle 2.Finally, the system also contains a device 25, which is likewise connected to the switching element 24, for monitoring the fill level of the second mill 2.

Die Funktion der Anlage ist wie folgt:The function of the system is as follows:

Das der Walzenmühle 1 zugeführte Mahlgut erfährt im Spalt der Walzenmühle eine Gutbettzerkleine­rung und bei entsprechender Korngröße zugleich eine Einzelkornzerkleinerung. Die bei der Gutbett­zerkleinerung anfallenden Agglomerate werden in der zweiten Mühle 2 aufgelöst. Gegebenenfalls erfährt das Mahlgut in der zweiten Mühle 2 eine weitere Zerkleinerung.The regrind fed to the roller mill 1 is comminuted in the nip of the roller mill and, if the grain size is appropriate, is also comminuted individually. The agglomerates resulting from the comminution of the material bed are dissolved in the second mill 2. If necessary, the ground material in the second mill 2 undergoes further comminution.

Das aus der Mühle 2 ausgetragene Gut wird im Sich­ter 3 gesichtet. Von der hierbei anfallenden Grieß­menge wird über die Stellklappe 6 ein Teilstrom der Walzenmühle 1 und ein weiterer Teilstrom der Mühle 2 zugeführt.The material discharged from the mill 2 is sighted in the sifter 3. A partial flow of the roller mill 1 and a further partial flow of the mill 2 are fed from the resulting amount of semolina via the control flap 6.

Über einen ersten Regelkreis, der die Meßeinrich­tung 4 und den Regler 22 enthält, wird die der Walzenmühle 1 über die Dosierbandwaagen 10, 11, 12 zugeführte Frischgutmenge in Abhängigkeit von der bei der Sichtung anfallenden gesamten Grieß­menge so geregelt, daß die Summe von Frischgut­menge und gesamter Grießmenge der Mühle 2 kon­stant bleibt.Via a first control loop, which contains the measuring device 4 and the controller 22, the quantity of fresh material fed to the roller mill 1 via the metering belt scales 10, 11, 12 is dependent on the total amount of semolina obtained during the screening is regulated in such a way that the sum of the quantity of fresh material and the total amount of semolina of the mill 2 remains constant.

Über einen zweiten Regelkreis, der die Meßeinrich­tung 19, die Stellklappe 6 sowie das Rechenglied 20 und den Regler 21 enthält, wird die bei der Sichtung anfallende Grießmenge auf die der Walzenmühle 1 und der zweiten Mühle 2 zugeführten Teilströme der­art aufgeteilt, daß die Summe von Frischgutmenge und der Walzenmühle zugeführter Grießmenge kon­stant bleibt. Die Walzenmühle 1 wird daher mit konstanter Materialmenge pro Zeiteinheit (t/h) betrieben.Via a second control circuit, which contains the measuring device 19, the control flap 6 and the computing element 20 and the controller 21, the amount of semolina obtained during the screening is divided between the partial streams fed to the roller mill 1 and the second mill 2 in such a way that the total amount of fresh material and the amount of semolina fed to the roller mill remains constant. The roller mill 1 is therefore operated with a constant amount of material per unit time (t / h).

Zweckmäßig läuft die Walzenmühle 1 hierbei mit konstanter Drehzahl.The roller mill 1 expediently runs at a constant speed.

Überschreitet der Füllstand der Mühle 2 einen Höchstwert, so gibt die Einrichtung 25 ein Sig­nal an das Umschaltglied 24 und unterbricht die vorstehend erläuterte, in Abhängigkeit der Ge­samtgrießmenge erfolgende Regelung der Frisch­gutmenge (d. h. den ersten Regelkreis) so lan­ge, bis sich der Füllstand der Mühle 2 wieder normalisiert hat.If the fill level of the mill 2 exceeds a maximum value, the device 25 sends a signal to the switching element 24 and interrupts the above-described regulation of the quantity of fresh material depending on the total amount of semolina (ie the first control circuit) until the fill level of the mill 2 normalized again.

Claims (8)

1. Verfahren zur zweistufigen Zerkleinerung von sprödem Mahlgut, wobei a) das Mahlgut zunächst im Spalt einer Walzen­mühle (1) eine Gutbettzerkleinerung erfährt, b) die hierbei gebildeten Agglomerate anschließend in einer der Walzenmühle (1) nachgeschalteten zweiten Mühle (2) aufgelöst und eventuell weiter zerkleinert werden, c) das aus der zweiten Mühle (2) ausgetragene Gut einer Sichtung unterworfen wird und von der hierbei anfallenden Grießmenge ein Teil­strom der Walzenmühle (1) und ein weiterer Teilstrom der zweiten Mühle (2) zugeführt wird, 1. Process for the two-stage comminution of brittle regrind, wherein a) the material to be ground is first comminuted in the nip of a roller mill (1), b) the agglomerates formed here are then dissolved in a second mill (2) connected downstream of the roller mill (1) and possibly further comminuted, c) the material discharged from the second mill (2) is subjected to a screening and a partial stream of the roller mill (1) and a further partial stream of the second mill (2) are fed from the resulting amount of semolina, gekennzeichnet durch folgende Merkmale: d) die der Walzenmühle (1) zugeführte Frischgut­menge wird in Abhängigkeit von der bei der Sichtung anfallenden gesamten Grießmenge so geregelt, daß die Summe von Frischgutmenge und gesamter Grießmenge der zweiten Mühle (2) konstant bleibt; e) die Aufteilung der bei der Sichtung anfal­lenden Grießmenge auf die Walzenmühle (1) und die zweite Mühle (2) wird so vorgenom­men, daß die Summe von Frischgutmenge und der Walzenmühle zugeführter Grießmenge kon­stant bleibt. characterized by the following features: d) the quantity of fresh material fed to the roller mill (1) is regulated as a function of the total quantity of semolina resulting from the screening in such a way that the sum of quantity of fresh material and the total quantity of semolina of the second mill (2) remains constant; e) the distribution of the amount of semolina resulting from the screening on the roller mill (1) and the second mill (2) is carried out so that the sum of the amount of fresh material and the amount of semolina fed to the roller mill remains constant. 2. Verfahren nach Anspruch 1, dadurch gekennzeich­net, daß der Füllstand der zweiten Mühle (2) überwacht und bei Überschreiten eines Höchst­wertes die in Abhängigkeit von der gesamten Grießmenge erfolgende Regelung der Frischgut­menge so lange unterbrochen wird, bis sich der Füllstand der zweiten Mühle wieder normalisiert hat.2. The method according to claim 1, characterized in that the fill level of the second mill (2) is monitored and, if a maximum value is exceeded, the regulation of the amount of fresh material which takes place as a function of the total amount of semolina is interrupted until the fill level of the second mill normalizes again Has. 3. Verfahren nach Anspruch 1, dadurch gekennzeich­net, daß die Walzenmühle (1) mit konstanter Drehzahl betrieben wird.3. The method according to claim 1, characterized in that the roller mill (1) is operated at a constant speed. 4. Anlage zur zweistufigen Zerkleinerung von sprö­dem Mahlgut, enthaltend a) eine Walzenmühle (1), b) eine der Walzenmühle (1) nachgeschaltete zweite Mühle (2), c) einen Sichter (3) zur Sichtung des aus der zweiten Mühle (2) ausgetragenen Gutes, d) eine Einrichtung zur Aufteilung der bei der Sichtung anfallenden Grießmenge in einen der Walzenmühle (1) zugeführten Teilstrom und einen der zweiten Mühle (2) zugeführten Teilstrom, 4. Plant for the two-stage comminution of brittle regrind containing a) a roller mill (1), b) a second mill (2) connected downstream of the roller mill (1), c) a classifier (3) for classifying the material discharged from the second mill (2), d) a device for dividing the amount of semolina obtained during the screening into a partial stream fed to the roller mill (1) and one fed into the second mill (2) Partial flow, gekennzeichnet durch folgende weitere Anlagen­teile: e) einen ersten Regelkreis,der die der Walzen­mühle (1) zugeführte Frischgutmenge in Ab­hängigkeit von der bei der Sichtung anfallenden gesamten Grießmenge so regelt, daß die Sum­me von Frischgutmenge und gesamter Grießmen­ge konstant bleibt, f) einen zweiten Regelkreis,der die Einrich­tung (5, 6) zur Aufteilung der bei der Sich­tung anfallenden Grießmenge derart steuert, daß die Summe von Frischgutmenge und der Walzenmühle (1) zugeführter Grießmenge kon­stant bleibt. characterized by the following additional system parts: e) a first control circuit which regulates the quantity of fresh material fed to the roller mill (1) as a function of the total quantity of semolina resulting from the screening so that the sum of the quantity of fresh material and the total quantity of semolina remains constant, f) a second control circuit which controls the device (5, 6) for dividing the amount of semolina resulting from the screening in such a way that the sum of the amount of fresh material and the amount of semolina fed to the roller mill (1) remains constant. 5. Anlage nach Anspruch 4, gekennzeichnet durch folgende Elemente des zweiten Regelkreises: a) eine Meßeinrichtung (19) zur Ermittlung der der Walzenmühle (1) zugeführten Grießmenge, b) ein Rechenglied (20), der aus der der­zeitigen Frischgutmenge und einem vorgege­benen Sollwert für die Summe von Frischgut­menge und zur Walzenmühle rückgeführter Grießmenge einen Sollwert für die zur Wal­zenmühle rückgeführte Grießmenge bildet, c) einen mit dem Rechenglied (20) und mit der Meßeinrichtung (19) verbundenen Regler (21), der aus dem vom Rechen­glied (20) gebildeten Sollwert und dem Signal der Meßeinrichtung (19) ein Regel­signal für die Einrichtung (5, 6) zur Auf­teilung der bei der Sichtung anfallenden Grieße erzeugt. 5. Plant according to claim 4, characterized by the following elements of the second control loop: a) a measuring device (19) for determining the quantity of semolina fed to the roller mill (1), b) a computing element (20) which, from the current quantity of fresh material and a predetermined target value for the sum of the quantity of fresh material and the quantity of semolina returned to the roller mill, forms a target value for the quantity of semolina returned to the roller mill, c) a controller (21) connected to the computing element (20) and to the measuring device (19), which uses the setpoint value formed by the computing element (20) and the signal from the measuring device (19) to produce a control signal for the device (5, 6) generated for the division of the greens resulting from the sighting. 6. Anlage nach Anspruch 4, gekennzeichnet durch a) eine Einrichtung (25) zur Überwachung des Füllstandes der zweiten Mühle (2), b) sowie ein Umschaltglied (24), das bei Über­schreitung eines Höchstwertes des Füllstan­des die in Abhängigkeit von der gesamten Grießmenge erfolgende Regelung der Frisch­gutmenge so lange unterbricht, bis sich der Füllstand der zweiten Mühle wieder normali­siert hat. 6. Plant according to claim 4, characterized by a) a device (25) for monitoring the fill level of the second mill (2), b) and a changeover element (24) which, when a maximum value of the fill level is exceeded, interrupts the regulation of the quantity of fresh material depending on the total amount of semolina until the fill level of the second mill has normalized again.
EP87117376A 1986-12-23 1987-11-25 Method and installation for the two-stage crushing of brittle material Expired - Lifetime EP0272485B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3644342 1986-12-23
DE19863644342 DE3644342A1 (en) 1986-12-23 1986-12-23 METHOD AND SYSTEM FOR THE TWO-STAGE CRUSHING OF SPROEDEM GROUND MATERIAL

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EP0272485A2 true EP0272485A2 (en) 1988-06-29
EP0272485A3 EP0272485A3 (en) 1989-08-16
EP0272485B1 EP0272485B1 (en) 1992-09-30

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EP87117376A Expired - Lifetime EP0272485B1 (en) 1986-12-23 1987-11-25 Method and installation for the two-stage crushing of brittle material

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US (1) US4783012A (en)
EP (1) EP0272485B1 (en)
JP (1) JPS63166443A (en)
KR (1) KR950007584B1 (en)
BR (1) BR8707013A (en)
CA (1) CA1284975C (en)
DE (2) DE3644342A1 (en)
ES (1) ES2035020T3 (en)
IN (1) IN172197B (en)

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Publication number Priority date Publication date Assignee Title
DE3815217A1 (en) * 1988-05-04 1989-11-16 Pfeiffer Christian Maschf METHOD FOR CRUSHING SPROEDEM GROUND
DE3843338A1 (en) * 1988-12-22 1990-06-28 Krupp Polysius Ag SAFE
DE3905123A1 (en) * 1989-02-20 1990-08-23 Kloeckner Humboldt Deutz Ag Sifter for sifting granular material and milling system with the activation of such a sifter
DE3921823A1 (en) * 1989-07-03 1991-01-17 Krupp Polysius Ag METHOD AND APPARATUS FOR MINING GRINDING
DE4005323A1 (en) * 1990-02-20 1991-08-22 Krupp Polysius Ag Crushing plant for cement material - involves first stage accepting pre-crushed material, and feeding to second stage with constant output regulation
DE4137199A1 (en) * 1991-11-12 1993-05-13 Krupp Polysius Ag METHOD FOR CONTROLLING A CIRCULATING MACHINE
DE4239602A1 (en) * 1992-11-25 1994-05-26 Krupp Polysius Ag Method and device for comminuting regrind
DE4337215A1 (en) * 1993-10-30 1995-05-04 Kloeckner Humboldt Deutz Ag Circulating grinding plant
DE4425452A1 (en) * 1994-07-19 1996-01-25 Kloeckner Humboldt Deutz Ag Method of breaking down composite ground material
DE4443479A1 (en) * 1994-12-07 1996-06-13 Kloeckner Humboldt Deutz Ag Circular grinding plant
DE29508598U1 (en) * 1995-05-31 1995-08-24 Siemens AG, 80333 München Device for operating grinding plants in the cement industry
JP2000176688A (en) * 1998-12-16 2000-06-27 Matsushita Electric Ind Co Ltd Method for utilizing metallic waste product as casting material, apparatus therefor and casting material obtained with the apparatus
SE527086C2 (en) * 2004-05-13 2005-12-20 Procedo Entpr Etablissement Process system for producing a composite of cementite material with reduced carbon dioxide emissions
US7927417B2 (en) * 2008-02-04 2011-04-19 Capitol Aggregates, Ltd. Cementitious composition and apparatus and method for manufacturing the same
ES2673151T3 (en) 2014-07-28 2018-06-20 Heidelbergcement Ag Procedure for crushing cement clinker
CN107399975B (en) * 2017-07-07 2020-09-11 杭州富阳福士得食品有限公司 Be used for ceramic raw materials grinding equipment

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DE3520069A1 (en) * 1985-06-04 1986-12-04 Krupp Polysius Ag, 4720 Beckum METHOD AND PLANT FOR TWO-STAGE CRUSHING

Also Published As

Publication number Publication date
EP0272485B1 (en) 1992-09-30
JPS63166443A (en) 1988-07-09
US4783012A (en) 1988-11-08
BR8707013A (en) 1988-08-09
DE3644342A1 (en) 1988-07-07
KR880007129A (en) 1988-08-26
DE3782016D1 (en) 1992-11-05
ES2035020T3 (en) 1993-04-16
CA1284975C (en) 1991-06-18
IN172197B (en) 1993-05-01
KR950007584B1 (en) 1995-07-12
EP0272485A3 (en) 1989-08-16

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