EP0648539B1 - Closed circuit grinding plant - Google Patents
Closed circuit grinding plant Download PDFInfo
- Publication number
- EP0648539B1 EP0648539B1 EP94114845A EP94114845A EP0648539B1 EP 0648539 B1 EP0648539 B1 EP 0648539B1 EP 94114845 A EP94114845 A EP 94114845A EP 94114845 A EP94114845 A EP 94114845A EP 0648539 B1 EP0648539 B1 EP 0648539B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- classifier
- milling
- circuit
- roller press
- grinding
- 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.)
- Expired - Lifetime
Links
Images
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
- B02C21/00—Disintegrating plant with or without drying of the material
Definitions
- the invention relates to a circulation grinding plant (circular grinding plant) with a High pressure roller press with material bed size reduction of the feed material and with downstream deagglomerator / sifter, the size (coarse sifter) for Roller press can be recirculated.
- Tube mills have made considerable efforts in recent years or to replace ball mills as completely as possible with other grinding processes.
- a method for comminuting or grinding is brittle ground material known (EP-B-0 084 383, Fig. 3 and 4), in which the regrind in the nip a high-pressure roller press is pressed under high pressure, which in part for Particle destruction, sometimes leading to the creation of cracks inside the particle and manifests itself visibly in the formation of agglomerates (so-called Schülpen). Because the individual particles of the ground material are in the area of the narrowest roller gap the high pressure roller press in a material bed, d. H. in one between two surfaces compressed bulk material are crushed, one speaks of the so-called material bed shredding.
- the one from the high-pressure roller press upcoming Gutagglomerate can be compared with disagglomerate or dissolve with little energy and then they become abandoned to a classifier, the whole of which is fed to the high pressure roller press be recirculated.
- a classifier the whole of which is fed to the high pressure roller press be recirculated.
- This well-known finished grinding system which can produce a finished product without that the high-pressure roller press is followed by a ball mill, however characterized by a high good circulation rate, d. H.
- the invention has for its object an overall by a low circulating grinding plant with application and specific energy requirements to create a high pressure roller press system that is produced in terms of Product quality is very variable and z. B. is able to simultaneously to produce at least two differently fine finished products of the same good material, without high material circulation rates and the use of tube mills or other fine grinding mills are required.
- Characteristic of the rotary grinding plant according to the invention is the series connection of at least two grinding circuits, each of which comprises a high-pressure roller press and a classifier.
- the material cycle in the first grinding circuit is relieved in that the fines / middle goods drawn off from the classifier of the first grinding circuit are introduced into the second grinding circuit with or without the sifting air flow.
- a partial flow can be discharged as a less fine finished product from the connecting line of the two grinding circuits, through which medium / fine material is transferred from the first grinding circuit into the two grinding circuit, e.g. B. with a fineness of 2800 cm 2 / g measured according to Blaine, while the fine finished product is withdrawn from the classifier of the second grinding circuit, for. B. with a fineness of 4500 cm 2 / g according to Blaine.
- the rotary grinding plant according to the invention With the rotary grinding plant according to the invention, at least two differently fine finished products of the same good material, such as e.g. B. Produce cement.
- the quality of the end product e.g. B. affect the grain distribution of the mixed product.
- differently fine cements with certain grain distributions and certain proportions of specific surfaces are indeed required, which results in the different cement qualities or types of cement.
- the rotary grinding plant according to the invention is able to meet these practical requirements with the lowest possible specific energy requirement.
- the rotary grinding plant according to the invention is also able to meet the requirement after high finished goods output in t / h as well as after high degrees of fineness of the end product (subtracted from the second grinding cycle) wear, as is the case with the installation of just a single high-pressure high-pressure roller press would not be possible.
- the two classifiers and high pressure roller presses can in their respective grinding circuits with regard to their operating conditions are each optimized, e.g. B. in terms of roller dimensions, Roll surface structures, roll peripheral speeds, more specific Pressure in the roll gap, roll gap geometry, specific roll press operation due to fine material feed, solid loading of the visible air, etc.
- a further connecting line can be provided, through which a Partial flow of the from the first classifier to the first high-pressure roller press Classifier to the second high pressure roller press (second grinding circuit) is.
- the first grinding cycle can be carried out by means of this classifier connection line relieved with a certain amount of semolina and with this amount of semolina the second grinding cycle can be targeted.
- the circulation grinding plant is made up of two grinding circuits connected in series composed of which the first grinding circuit is a high pressure roller press (10) with a downstream deagglomerator / sifter (11) and the second grinding circuit also a high-pressure roller press (12) with downstream Have deagglomerator / sifter (13). Both roller presses have two rotatably mounted, counter-rotating and through a nip separate rollers. Fresh produce (14), e.g. B. not pre-shredded Cement clinker, the roller press (10) is abandoned and there one combined single grain shredding and material bed shredding.
- Fresh produce e.g. B. not pre-shredded Cement clinker
- the Material crushed in the narrowest nip by material bed shredding emerges from the Crushed nip and optionally partially agglomerated, d. H. to Schülpen (15) pressed out, the proportion of which has already been reduced to the desired fineness Particles of the cement to be produced can be relatively high.
- the Schülpen (15) are preferably dynamic via transporter or line (16) Sifter (11) abandoned in the upper area with an impact crusher (17) can be equipped in which the Schülpenmaterial (15) deagglomerates before it enters the classifier's viewing area (11). It exists but also the possibility of the separator (11) having an external separate deagglomerator upstream.
- the fines / medium extraction line (19) from the classifier (11) of the first grinding circuit leads together with the classifying air to the classifier (13) of the second grinding circuit, in which the fines (22) are separated from the middle goods (23), which the latter fed to the high-pressure roller press (12) for comminuting the bed is from which the Schülpenmaterial (24) via the transporter or line (25) to Disagglomeration stage (26) of the classifier (13) is recirculated.
- a good part flow as a second less fine finished product (B) with a fineness of can be obtained via branch lines (32) and separators (33) e.g. B. 2800 cm 2 / g measured according to Blaine can be discharged, the exhaust air stream leaving the separator (33) can be fed back at least in part into the connecting line (19) via the suction fan and line (34).
- the desired different cement qualities can be produced by mixing the finished products (A and B), it also being possible to influence the desired particle size distribution in the finished product.
- the fine / medium (35) from the first grinding circuit is fed via line (39 and / or 40) introduced into the second grinding circuit, namely in the product feed line and / or in the discharge duct of the deagglomerator / classifier (26, 13).
- the classifier (13) of the second grinding circuit also has its own Visual air recirculation line (41) equipped, the visual air recirculation is accomplished by the induced draft fan (28). Even in the embodiment 2 the finished products (A and B) obtained simultaneously can each can be mixed with each other to produce the desired finished product qualities to create. Otherwise, the same parts in the exemplary embodiments 1, 2 and 3 with the same reference numerals.
- Fig. 3 is an additional connecting line connecting the two grinding circuits (42) through which a partial flow from the first classifier (11) to first high-pressure roller press (10) guided sifting meal (20) [coarse meal] by merging with the semolina (23) from the second sifter (13) Line (43) to the second high-pressure roller press (12) is guided.
- the solution can also be based on the desired crop circulation rates and grain distributions in the feed for optimized running behavior of the roller press in the first Grinding cycle and also in the second grinding cycle targeted influence become.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Description
Die Erfindung betrifft eine Umlaufmahlanlage (Kreislaufmahlanlage) mit einer Hochdruck-Walzenpresse mit Gutbettzerkleinerung des Aufgabegutes und mit nachgeschaltetem Desagglomerator/Sichter, dessen Grieße (Sichtergrobgut) zur Walzenpresse rezirkuliert werden.The invention relates to a circulation grinding plant (circular grinding plant) with a High pressure roller press with material bed size reduction of the feed material and with downstream deagglomerator / sifter, the size (coarse sifter) for Roller press can be recirculated.
Man hat in den letzten Jahren erhebliche Anstrengungen unternommen, Rohrmühlen bzw. Kugelmühlen durch andere Mahlprozesse möglichst vollständig zu ersetzen. So ist ein Verfahren zur Zerkleinerung bzw. Mahlung spröden Mahlgutes bekannt (EP-B-0 084 383, Fig. 3 und 4), bei dem das Mahlgut im Walzenspalt einer Hochdruck-Walzenpresse unter hohem Druck gepreßt wird, was teils zur Partikelzerstörung, teils zur Erzeugung von Anrissen im Partikelinneren führt und sich sichtbar in der Bildung von Agglomeraten (sogenannten Schülpen) äußert. Weil die einzelnen Partikel des Mahlgutes im Bereich des engsten Walzenspältes der Hochdruck-Walzenpresse in einem Gutbett, d. h. in einer zwischen zwei Flächen zusammengedrückten Materialschüttung gegenseitig zerquetscht werden, spricht man hierbei von der sogenannten Gutbettzerkleinerung. Die aus der Hochdruck-Walzenpresse kommenden Gutagglomerate lassen sich mit vergleichsweise geringem Energieaufwand desagglomerieren bzw. auflösen und sie werden dann einem Sichter aufgegeben, dessen Grieße vollständig zur Hochdruck-Walzenpresse rezirkuliert werden. Infolge der Anwendung des hohen Preßdruckes in der Hochdruck-Walzenpresse und der Zerstörung des Korngefüges enthalten die aus der Walzenpresse kommenden Gutagglomerate bereits fertig feines Gut, das aus dem Sichter der Kreislaufmahlanlage zusammen mit der Sichtluft abgezogen wird. Dieses bekannte Fertigmahlsystem, das ein Fertigprodukt herstellen kann, ohne daß der Hochdruck-Walzenpresse eine Kugelmühle nachgeschaltet ist, ist allerdings durch eine hohe Gutkreislaufrate gekennzeichnet, d. h. die vom Sichter zur Walzenpresse rezirkulierte Grießemenge ist groß, was einen groß gebauten Sichter sowie eine große Hochdruck-Walzenpresse bedingt, deren Durchsatzleistung in t/h in der Praxis aber auf einen bestimmten Wert begrenzt ist. Außerdem ist die bekannte Umlaufmahlanlage in der Variierung der jeweils gewünschten Produktqualität wie Kornfeinheit, Kornverteilung etc. beschränkt, es lassen sich z. B. nicht gleichzeitig zwei verschieden feine Fertigprodukte desselben Gutmaterials wie z. B. Zements herstellen.Tube mills have made considerable efforts in recent years or to replace ball mills as completely as possible with other grinding processes. A method for comminuting or grinding is brittle ground material known (EP-B-0 084 383, Fig. 3 and 4), in which the regrind in the nip a high-pressure roller press is pressed under high pressure, which in part for Particle destruction, sometimes leading to the creation of cracks inside the particle and manifests itself visibly in the formation of agglomerates (so-called Schülpen). Because the individual particles of the ground material are in the area of the narrowest roller gap the high pressure roller press in a material bed, d. H. in one between two surfaces compressed bulk material are crushed, one speaks of the so-called material bed shredding. The one from the high-pressure roller press upcoming Gutagglomerate can be compared with disagglomerate or dissolve with little energy and then they become abandoned to a classifier, the whole of which is fed to the high pressure roller press be recirculated. As a result of the application of the high pressure in the High pressure roller press and the destruction of the grain structure contain the from good agglomerates coming from the roller press are already finished is withdrawn from the classifier of the circuit grinding plant together with the classifying air. This well-known finished grinding system, which can produce a finished product without that the high-pressure roller press is followed by a ball mill, however characterized by a high good circulation rate, d. H. from the sifter to the Roll press recirculated semolina amount is large, which is a large-sized classifier as well as a large high-pressure roller press, whose throughput in t / h in practice, however, is limited to a certain value. In addition, the well-known Circulating grinding plant in the variation of the desired product quality such as grain fineness, grain distribution, etc., it can be z. B. not at the same time two different fine finished products of the same good material as e.g. B. Produce cement.
Es ist auch bekannt (DE-A-39 19 416), zwei Gutbettzerkleinetungs-Hochdruck-Walzenpressen parallel zu schalten, in den beiden Walzenpressen unterschiedliche mahlbare bzw. unterschiedlich harte Gutmaterialien wie Zementrohmehlkomponenten zu behandeln und die Gutausträge beider Walzenpressen zu einem gemeinsamen Sichter zu führen, aus dem ein einziges Fertigprodukt wie z. B. Zementrohmehl abgezogen wird. Auch mit dieser Umlaufmahlanlage ist es nicht möglich, z. B. gleichzeitig zwei verschieden feine Fertiggprodukte ein und desselben Gutmaterials herzustellen.It is also known (DE-A-39 19 416), two material bed crushing high-pressure roller presses to connect in parallel, different in the two roller presses good materials that can be ground or hard, such as cement raw meal components to treat and the good discharges of both roller presses to a common Lead sifter from which a single finished product such. B. raw cement meal is subtracted. Even with this circulation grinding plant, it is not possible e.g. B. at the same time two differently fine finished products of one and the same good material to manufacture.
Der Erfindung liegt die Aufgabe zugrunde, eine insgesamt durch einen niedrigen spezifischen Energiebedarf gekennzeichnete Umlaufmahlanlage mit Anwendung eines Hochdruck-Walzenpressensystems zu schaffen, das hinsichtlich der erzeugten Produktqualität sehr variierbar ist und das z. B. in der Lage ist, gleichzeitig wenigstens zwei verschieden feine Fertigproduktes desselben Gutmaterials herzustellen, ohne daß hohe Gutkreislaufraten und der Einsatz von Rohrmühlen oder anderen Feinzerkleinerungsmühlen erforderlich sind.The invention has for its object an overall by a low circulating grinding plant with application and specific energy requirements to create a high pressure roller press system that is produced in terms of Product quality is very variable and z. B. is able to simultaneously to produce at least two differently fine finished products of the same good material, without high material circulation rates and the use of tube mills or other fine grinding mills are required.
Diese Aufgabe wird gemäß der Erfindung mit den Maßnahmen des Kennzeichnungsteils
des Anspruchs 1 gelöst.This object is achieved according to the invention with the measures of the labeling part
of
Charakteristisch für die erfindungsgemäße Umlaufmahlanlage ist die Hintereinanderschaltung wenigstens zweier Mahlkreisläufe, von denen jeder eine Hochdruck-Walzenpresse und einen Sichter umfaßt. Der Gutkreislauf im ersten Mahlkreislauf wird dadurch entlastet, daß das aus dem Sichter des ersten Mahlkreislaufes abgezogene Feingut/Mittelgut mit oder ohne dem Sichtluftstrom in den zweiten Mahlkreislauf eingebracht wird. So wird z. B. der aus dem Sichter des ersten Mahlkreislaufes abgezogene Sichtluftstrom, der mit Feingut und Mittelgut beladen ist, direkt in den Sichter des zweiten Mahlkreislaufes eingeführt, dem abluftseitig ein Abscheider und Saugzuggebläse nachgeschaltet ist. Es besteht aber auch die Möglichkeit, aus dem aus dem Sichter des ersten Mählkreislaufs abgezogenen Sichtluftstrom mittels eines Abscheiders das Feingut/Mittelgut abzutrennen und dieses in den zweiten Mahlkreislauf einzuführen, und zwar im Gutkreislauf des zweiten Mahlkreislaufes gesehen vor und/oder nach dem in diesem Kreislauf eingeschalteten Sichter. Jedenfalls kann aus der Verbindungsleitung der beiden Mahlkreisläufe, durch welche Mittelgut/Feingut aus dem ersten Mahlkreislauf in den zwei Mahlkreislauf überführt wird, ein Teilstrom als weniger feines Fertigprodukt ausgeschleust werden, z. B. mit einer Feinheit von 2800 cm2/g gemessen nach Blaine, während des feine Fertigprodukt aus dem Sichter des zweiten Mahlkreislaufs abgezogen wird, z. B. mit einer Feinheit von 4500 cm2/g nach Blaine. Mit der erfindungsgemäßen Umlaufmahlanlage lassen sich also mit niedrigem spezifischen Gesamtenergiebedarf gleichzeitig wenigstens zwei verschieden feine Fertigprodukte desselben Gutmaterials wie z. B. Zement herstellen. Durch Vermischung der beiden Fertigprodukte in bestimmten Mischungsverhältnissen läßt sich auch noch die Qualität des Endproduktes, z. B. die Kornverteilung des Mischproduktes beeinflussen. In der Praxis werden in der Tat verschieden feine Zemente mit bestimmten Kornverteilungen und bestimmten Anteilen von spezifischen Oberflächen benötigt, woraus sich die verschiedenen Zementqualitäten bzw. Zementsorten ergeben. Die erfindungsgemäße Umlaufmahlanlage ist in der Lage, diesen Anforderungen der Praxis mit möglichst geringem spezifischen Energiebedarf Rechnung zu tragen.Characteristic of the rotary grinding plant according to the invention is the series connection of at least two grinding circuits, each of which comprises a high-pressure roller press and a classifier. The material cycle in the first grinding circuit is relieved in that the fines / middle goods drawn off from the classifier of the first grinding circuit are introduced into the second grinding circuit with or without the sifting air flow. So z. B. the sifted from the classifier of the first grinding circuit, the visual air flow, which is loaded with fine and medium, introduced directly into the classifier of the second grinding circuit, which is followed by a separator and induced draft fan on the exhaust side. However, there is also the possibility of separating the fine / middle goods from the classifying air stream drawn from the classifier of the first grinding circuit and introducing them into the second grinding circuit, namely before and / or after in the circulation of the second grinding circuit switched on sifter. In any case, a partial flow can be discharged as a less fine finished product from the connecting line of the two grinding circuits, through which medium / fine material is transferred from the first grinding circuit into the two grinding circuit, e.g. B. with a fineness of 2800 cm 2 / g measured according to Blaine, while the fine finished product is withdrawn from the classifier of the second grinding circuit, for. B. with a fineness of 4500 cm 2 / g according to Blaine. With the rotary grinding plant according to the invention, at least two differently fine finished products of the same good material, such as e.g. B. Produce cement. By mixing the two finished products in certain mixing ratios, the quality of the end product, e.g. B. affect the grain distribution of the mixed product. In practice, differently fine cements with certain grain distributions and certain proportions of specific surfaces are indeed required, which results in the different cement qualities or types of cement. The rotary grinding plant according to the invention is able to meet these practical requirements with the lowest possible specific energy requirement.
Die erfindungsgemäße Umlaufmahlanlage ist außerdem in der Lage, dem Erfordernis nach hohen Fertiggutleistungen in t/h sowie nach hohen Feinheitsgraden des (aus dem zweiten Mahlkreislauf abgezogenen) Endproduktes Rechnung zu tragen, wie es mit der Installierung nur einer einzigen Gutbettzerkleinerungs-Hochdruck-Walzenpresse nicht möglich wäre. Die beiden Sichter und Hochdruck-Walzenpressen können in ihren jeweiligen Mahlkreisläufen hinsichtlich ihrer Betriebsbedingungen jeweils optimiert werden, z. B. hinsichtlich der Walzendimensionen, Walzenoberflächenstrukturen, Walzenumfangsgeschwindigkeiten, spezifischer Druck im Walzenspalt, Walzenspaltgeometrie, spezifischer Walzenpressenbetrieb wegen feiner Materialaufgabe, Feststoffbeladungsgrad der Sichtluft usw.. The rotary grinding plant according to the invention is also able to meet the requirement after high finished goods output in t / h as well as after high degrees of fineness of the end product (subtracted from the second grinding cycle) wear, as is the case with the installation of just a single high-pressure high-pressure roller press would not be possible. The two classifiers and high pressure roller presses can in their respective grinding circuits with regard to their operating conditions are each optimized, e.g. B. in terms of roller dimensions, Roll surface structures, roll peripheral speeds, more specific Pressure in the roll gap, roll gap geometry, specific roll press operation due to fine material feed, solid loading of the visible air, etc.
Nach einem weiteren Merkmal der Erfindung kann bei der Umlaufmahlanlage außer der die beiden Sichter der beiden Mahlkreisläufe verbindenden Verbindungsleitung eine weitere Verbindungsleitung vorgesehen sein, durch welche ein Teilstrom der vom ersten Sichter zur ersten Hochdruck-Walzenpresse geführten Sichtergrieße zur zweiten Hochdruck-Walzenpresse (zweiter Mahlkreislauf) geführt ist. Mittels dieser Sichtergrießeverbindungsleitung kann der erste Mahlkreislauf mit einer bestimmten Grießemenge gezielt entlastet und mit dieser Grießemenge der zweite Mahlkreislauf gezielt belastet werden.According to a further feature of the invention can in the recycle grinding plant except for the connecting line connecting the two classifiers of the two grinding circuits a further connecting line can be provided, through which a Partial flow of the from the first classifier to the first high-pressure roller press Classifier to the second high pressure roller press (second grinding circuit) is. The first grinding cycle can be carried out by means of this classifier connection line relieved with a certain amount of semolina and with this amount of semolina the second grinding cycle can be targeted.
Die Erfindung und deren weitere Merkmale und Vorteile werden anhand der in den Figuren schematisch dargestellten Ausführungsbeispiele näher erläutert.The invention and its further features and advantages are based on the in the figures schematically illustrated embodiments.
Es zeigt:
- Fig. 1:
- die erfindungsgemäße Umlaufmahlanlage mit zwei hintereinandergeschalteten Mahlkreisläufen in einer ersten Schaltungsanordnung;
- Fig. 2:
- die Umlaufmahlanlage der Fig. 1 in einer zweiten Schaltungsanordnung, und
- Fig. 3:
- die Umlaufmahlanlage der Fig. 1 in einer dritten Schaltungsanordnung.
- Fig. 1:
- the rotary grinding plant according to the invention with two grinding circuits connected in series in a first circuit arrangement;
- Fig. 2:
- 1 in a second circuit arrangement, and
- Fig. 3:
- 1 in a third circuit arrangement.
Nach Fig. 1 ist die Umlaufmahlanlage aus zwei hintereinandergeschalteten Mahlkreisläufen zusammengesetzt, von denen der erste Mahlkreislauf eine Hochdruck-Walzenpresse (10) mit nachgeschaltetem Desagglomerator/Sichter (11) und der zweite Mahlkreislauf ebenfalls eine Hochdruck-Walzenpresse (12) mit nachgeschaltetem Desagglomerator/Sichter (13) aufweisen. Beide Walzenpressen weisen jeweils zwei drehbar gelagerte, gegenläufig rotierbare und durch einen Preßwalzenspalt voneinander getrennte Walzen auf. Frischgut (14), z. B. nicht vorzerkleinerter Zementklinker, wird der Walzenpresse (10) aufgegeben und dort einer kombinierten Einzelkornzerkleinerung und Gutbettzerkleinerung unterzogen. Das im engsten Walzenspalt durch Gutbettzerkleinerung zerkleinerte Gut tritt aus dem Walzenspalt zerkleinert und gegebenenfalls teilweise agglomeriert, d. h. zu Schülpen (15) gepreßt aus, deren Anteil an bereits bis zur gewünschten Feinheit reduzierter Partikel des herzustellenden Zementes relativ hoch sein kann. Die Schülpen (15) werden über Transporteur bzw. Leitung (16) dem vorzugsweise dynamischen Sichter (11) aufgegeben, der in seinem oberen Bereich mit einem Prallzerkleinerer (17) ausgerüstet sein kann, in welchem das Schülpenmaterial (15) desagglomeriert wird, bevor es in den Sichtraum des Sichters (11) eintritt. Es besteht aber auch die Möglichkeit, dem Sichter (11) einen externen separaten Desagglomerator vorzuschalten. In dem mit eingeführter Sichtluft (18) betriebenen Sichter (11) wird aus dem desagglomerierten Gut Feingut/Mittelgut (19) zusammen mit der Sichterabluft abgeschieden, während die den Sichter (11) verlassende grobe Kornfraktion (20) [grobe Grieße] zur Walzenpresse (10) rezirkuliert wird. Es besteht auch die Möglichkeit, wenigstens einen Teilstrom des Frischgutes statt bei (14) bei (21) dem ersten Mahlkreislauf zuzuführen.According to Fig. 1, the circulation grinding plant is made up of two grinding circuits connected in series composed of which the first grinding circuit is a high pressure roller press (10) with a downstream deagglomerator / sifter (11) and the second grinding circuit also a high-pressure roller press (12) with downstream Have deagglomerator / sifter (13). Both roller presses have two rotatably mounted, counter-rotating and through a nip separate rollers. Fresh produce (14), e.g. B. not pre-shredded Cement clinker, the roller press (10) is abandoned and there one combined single grain shredding and material bed shredding. The Material crushed in the narrowest nip by material bed shredding emerges from the Crushed nip and optionally partially agglomerated, d. H. to Schülpen (15) pressed out, the proportion of which has already been reduced to the desired fineness Particles of the cement to be produced can be relatively high. The Schülpen (15) are preferably dynamic via transporter or line (16) Sifter (11) abandoned in the upper area with an impact crusher (17) can be equipped in which the Schülpenmaterial (15) deagglomerates before it enters the classifier's viewing area (11). It exists but also the possibility of the separator (11) having an external separate deagglomerator upstream. In the classifier operated with introduced classifying air (18) (11) from the disagglomerated good / medium good (19) together with the classifier exhaust air is separated, while the coarse leaving the classifier (11) Grain fraction (20) [coarse meal] is recirculated to the roller press (10). It exists also the possibility of at least a partial flow of the fresh produce instead of (14) at (21) to feed the first grinding circuit.
Die Feingut-/Mittelgut-Abzugsleitung (19) aus dem Sichter (11) des ersten Mahlkreislaufs führt zusammen mit der Sichtluft zum Sichter (13) des zweiten Mahlkreislaufs, in welchem das Feingut (22) vom Mittelgut (23) getrennt wird, welch letzteres der Hochdruck-Walzenpresse(12) zur Gutbettzerkleinerung zugeführt wird, aus der das Schülpenmaterial (24) über Transporteur bzw. Leitung (25) zur Desagglomerierstufe (26) des Sichters (13) rezirkuliert wird.The fines / medium extraction line (19) from the classifier (11) of the first grinding circuit leads together with the classifying air to the classifier (13) of the second grinding circuit, in which the fines (22) are separated from the middle goods (23), which the latter fed to the high-pressure roller press (12) for comminuting the bed is from which the Schülpenmaterial (24) via the transporter or line (25) to Disagglomeration stage (26) of the classifier (13) is recirculated.
Im Abscheider (27) wird das in der Sichterabluft enthaltene Feingut als Fertigprodukt (A) mit einer Feinheit von z. B. 4500 cm2/g gemessen nach Blaine von der Sichterabluft abgetrennt, die über ein Saugzuggebläse (28) abgezogen und über Leitung (29, 18) zum Sichter (11) des ersten Mahlkreislaufs rezirkuliert wird. Es besteht auch die Möglichkeit, den Sichter (13) des zweiten Mahlkreislaufs über die Leitungen (30, 31) mit einer eigenen/zusätzlichen Sichtluft zu versorgen. Aus der Verbindungsleitung (19) der beiden Mahlkreisläufe zur Überführung des aus dem Sichter (11) des ersten Mahlkreislaufs abgezogenen Feinguts/Mittelguts kann über Abzweigleitungen (32) und Abscheider (33) ein Gutteilstrom als zweites weniger feines Fertigprodukt (B) mit einer Feinheit von z. B. 2800 cm2/g gemessen nach Blaine ausgeschleust werden, wobei der den Abscheider (33) verlassende Abluftstrom über Saugzuggebläse und Leitung (34) wenigstens zum Teil wieder in die Verbindungsleitung (19) eingespeist werden kann. Durch Vermischung der Fertigprodukte (A und B) sind gewünschte verschiedene Zementqualitäten herstellbar, wobei auch noch Einfluß auf die jeweils gewünschte Kornverteilung im Fertigprodukt genommen werden kann. In the separator (27), the fines contained in the classifier exhaust air as finished product (A) with a fineness of z. B. 4500 cm 2 / g measured according to Blaine separated from the classifier exhaust air, which is drawn off via a suction fan (28) and recirculated via line (29, 18) to classifier (11) of the first grinding circuit. It is also possible to supply the classifier (13) of the second grinding circuit with its own / additional classifying air via the lines (30, 31). From the connecting line (19) of the two grinding circuits for transferring the fines / middle goods withdrawn from the classifier (11) of the first grinding circuit, a good part flow as a second less fine finished product (B) with a fineness of can be obtained via branch lines (32) and separators (33) e.g. B. 2800 cm 2 / g measured according to Blaine can be discharged, the exhaust air stream leaving the separator (33) can be fed back at least in part into the connecting line (19) via the suction fan and line (34). The desired different cement qualities can be produced by mixing the finished products (A and B), it also being possible to influence the desired particle size distribution in the finished product.
Beim Ausführungsbeispiel der Fig. 2 ist im Unterschied zur Fig. 1 die dortige
Verbindungsleitung (19) zwischen den beiden Mahlkreisläufen durch eine Verbindungsleitung
(35) ersetzt, in der das Feingut/Mittelgut zum zweiten Mahlkreislauf
gefördert wird, welches in einem dem Sichter (11) nachgeschalteten Abscheider
(36) von der Sichterabluft (37) abgetrennt worden ist, die von einem eigenen
Saugzuggebläse (38) in einem eigenen Kreislauf zum Sichter (11) rezirkuliert
wird. Das Feingut/Mittelgut (35) aus dem ersten Mahlkreislauf wird über Leitung
(39 und/oder 40) in den zweiten Mahlkreislauf eingeführt, und zwar in die Gutzuführungsleitung
und/oder in die Gutabzugsleitung des Desagglomerators/Sichters
(26, 13). Der Sichter (13) des zweiten Mahlkreislaufs ist ebenfalls mit einer eigenen
Sichtluftrezirkulierungsleitung (41) ausgestattet, wobei die Sichtluftrezirkulierung
vom Saugzuggebläse (28) bewerkstelligt wird. Auch beim Ausführungsbeispiel
der Fig. 2 können die gleichzeitig gewonnenen Fertigprodukte (A und B) jeweils
miteinander vermischt werden, um ganz bestimmte gewünschte Fertigproduktqualitäten
zu erzeugen. Im übrigen sind gleiche Teile bei den Ausführungsbeispielen
der Fig. 1, 2 sowie auch 3 mit gleichen Bezugsziffern versehen.In the embodiment of FIG. 2, in contrast to FIG. 1, the one there
Connection line (19) between the two grinding circuits through a connection line
(35) replaced, in which the fines / middle goods for the second grinding cycle
is promoted, which in a separator downstream of the classifier (11)
(36) has been separated from the classifier exhaust air (37) by its own
Suction fan (38) is recirculated to the classifier (11) in a separate circuit
becomes. The fine / medium (35) from the first grinding circuit is fed via line
(39 and / or 40) introduced into the second grinding circuit, namely in the product feed line
and / or in the discharge duct of the deagglomerator / classifier
(26, 13). The classifier (13) of the second grinding circuit also has its own
Visual air recirculation line (41) equipped, the visual air recirculation
is accomplished by the induced draft fan (28). Even in the embodiment
2 the finished products (A and B) obtained simultaneously can each
can be mixed with each other to produce the desired finished product qualities
to create. Otherwise, the same parts in the
Bei der erfindungsgemäßen Umlaufmahlanlage gemäß Ausführungsbeispiel der Fig. 3 ist eine die beiden Mahlkreisläufe verbindende zusätzliche Verbindungsleitung (42) vorhanden, durch welche ein Teilstrom der vom ersten Sichter (11) zur ersten Hochdruck-Walzenpresse (10) geführten Sichtergrieße (20) [grobe Grieße] durch Zusammenführung mit den Grießen (23) aus dem zweiten Sichter (13) über Leitung (43) zur zweiten Hochdruck-Walzenpresse (12) geführt wird. Mit dieser Lösung kann auch auf jeweils gewünschte Gutkreislaufraten sowie Kornverteilungen im Aufgabegut für optimiertes Laufverhalten der Walzenpresse im ersten Mahlkreislauf sowie auch im zweiten Mahlkreislauf gezielt Einfluß genommen werden.In the rotary grinding plant according to the embodiment of the invention Fig. 3 is an additional connecting line connecting the two grinding circuits (42) through which a partial flow from the first classifier (11) to first high-pressure roller press (10) guided sifting meal (20) [coarse meal] by merging with the semolina (23) from the second sifter (13) Line (43) to the second high-pressure roller press (12) is guided. With this The solution can also be based on the desired crop circulation rates and grain distributions in the feed for optimized running behavior of the roller press in the first Grinding cycle and also in the second grinding cycle targeted influence become.
Claims (3)
- A closed circuit milling installation with a high pressure roller press (10) with material bed pulverising of the charge and with a following dis-agglomerator/classifier (17, 11), whose granular output feed (20) opens into the roller press (10),
characterised in that at least one further- milling circuit is connected after the first milling circuit, similarly with a high pressure roller press (12) and dis-agglomerator/classifier (26, 13), in a manner such that the fine material /medium material extraction channel (19 or 35) from the classifier (11) of the first milling circulation opens into the classifier (13) of the second milling circuit, whereby the granular extraction channel (23) of the second classifier (13) opens into the second high pressure roller press (12) and the fine material extraction channel (22, A) of the second milling circuit is taken out of the recirculating milling installation. - A closed circuit milling installation according to Claim 1,
characterised in that from the connecting channel (19 or 35) of the two milling circuits for the transfer of the fine material/medium material drawn off from the classifier (11) of the first milling circuit, a partial stream can be let out as a second, less fine completed product (B). - A closed circuit milling installation according to Claim 1 or Claim 2,
characterised in that a (additional) connecting channel (42) joining the two milling circuits, through which is taken a partial stream of the classified granules (20) from the first classifier (11) to the first high pressure roller press (10), is taken to the second high pressure roller press (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4334904 | 1993-10-13 | ||
| DE4334904A DE4334904A1 (en) | 1993-10-13 | 1993-10-13 | Circulating grinding plant |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0648539A2 EP0648539A2 (en) | 1995-04-19 |
| EP0648539A3 EP0648539A3 (en) | 1995-10-11 |
| EP0648539B1 true EP0648539B1 (en) | 1999-07-07 |
Family
ID=6500062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94114845A Expired - Lifetime EP0648539B1 (en) | 1993-10-13 | 1994-09-21 | Closed circuit grinding plant |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0648539B1 (en) |
| DE (2) | DE4334904A1 (en) |
| DK (1) | DK0648539T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101821088B1 (en) | 2008-07-02 | 2018-01-22 | 뷔흘러 에이지 | Apparatus and method for producing flour and/or semolina |
| DE102013019840A1 (en) * | 2013-11-26 | 2015-05-28 | Khd Humboldt Wedag Gmbh | Process for the production of cement |
| CN105344446A (en) * | 2015-11-25 | 2016-02-24 | 天津水泥工业设计研究院有限公司 | Roller press pregrinding system adopting light grinding medium |
| CN106622600A (en) * | 2017-01-20 | 2017-05-10 | 长沙万荣粉体设备科技有限公司 | Powder grinding device |
| DE102017117985A1 (en) * | 2017-08-08 | 2019-02-14 | Thyssenkrupp Ag | Process and plant for the production of cement |
| CN108097364A (en) * | 2018-01-31 | 2018-06-01 | 徐州至信建材机械有限公司 | A kind of novel concrete industrial roll press cycle closed-circuit system of application specific fine powder separation equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3719251A1 (en) * | 1987-06-10 | 1988-12-22 | Kloeckner Humboldt Deutz Ag | METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROSSGUTES |
| DE3744163A1 (en) * | 1987-12-24 | 1989-07-06 | Kloeckner Humboldt Deutz Ag | Method and plant for processing ore, coal or other minerals |
| DE3915432C2 (en) * | 1989-05-11 | 1996-05-09 | Kloeckner Humboldt Deutz Ag | Process for the production of standard cement |
| DE3920005A1 (en) * | 1989-06-20 | 1991-01-03 | Kloeckner Humboldt Deutz Ag | PLANT FOR CRUSHING OR GRINDING SPROEDEM GOODS AND METHOD FOR OPERATING SUCH A PLANT |
-
1993
- 1993-10-13 DE DE4334904A patent/DE4334904A1/en not_active Withdrawn
-
1994
- 1994-09-21 DE DE59408467T patent/DE59408467D1/en not_active Expired - Fee Related
- 1994-09-21 EP EP94114845A patent/EP0648539B1/en not_active Expired - Lifetime
- 1994-09-21 DK DK94114845T patent/DK0648539T3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE4334904A1 (en) | 1995-04-20 |
| DK0648539T3 (en) | 2000-01-17 |
| DE59408467D1 (en) | 1999-08-12 |
| EP0648539A2 (en) | 1995-04-19 |
| EP0648539A3 (en) | 1995-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0650763B1 (en) | Closed circuit grinding plant | |
| EP0193033B1 (en) | Grinding and milling device for brittle material to be ground, such as cement clinker, ore, coal or the like | |
| EP0384101B1 (en) | Air classifier for sifting a granular material, and grinding plant employing such a classifier | |
| EP0603481B1 (en) | Method and arrangement for milling grinding stock | |
| EP2024091B1 (en) | Roller press, in particular for interparticle crushing | |
| EP0220681A2 (en) | Device for grinding and milling damp brittle material | |
| WO2010072276A1 (en) | Method and apparatus for comminuting mineral ground product | |
| EP0406591B1 (en) | Method and arrangement for milling material to be milled | |
| WO2015086554A1 (en) | Closed-circuit grinding plant having a pre-classifier and a ball mill | |
| DE2600499A1 (en) | PROCESS AND EQUIPMENT FOR PROCESSING ABRASIVE GOODS | |
| EP3074137B1 (en) | Method for producing cement | |
| EP0610573A2 (en) | Grinding method and corresponding plant | |
| DE19514971A1 (en) | Energy efficient grinding, esp. of cement clinker | |
| EP0399192B1 (en) | Roller mill, especially for pressure milling of granular material | |
| EP0648539B1 (en) | Closed circuit grinding plant | |
| DE3544798A1 (en) | DEVICE FOR CRUSHING AND GRINDING SPROEDEN GROUND MATERIALS, IN PARTICULAR OF DAMP STARTING MATERIAL | |
| DE19526040A1 (en) | Installation in which grains of material are reduced in size | |
| EP1640070A1 (en) | Apparatus and method for grinding material | |
| DE3711926A1 (en) | Device for comminuting and grinding brittle material to be ground, such as cement clinker, ore, coal or the like | |
| EP1129781A1 (en) | Method and arrangement for a two-stage sifting of granular material | |
| DE69124601T2 (en) | Multi-pass roller crusher | |
| EP0614701A2 (en) | Method and installation for milling brittle material within a bed of material | |
| DE10147591B4 (en) | grinding plant | |
| DE3710602A1 (en) | Apparatus and method for processing granular material, in particular wheat | |
| EP0801985A1 (en) | High pressure roller press for pressure milling of granular material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE DK FR |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE DK FR |
|
| 17P | Request for examination filed |
Effective date: 19950824 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DEUTZ AKTIENGESELLSCHAFT |
|
| 17Q | First examination report despatched |
Effective date: 19980216 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE DK FR |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19990707 |
|
| REF | Corresponds to: |
Ref document number: 59408467 Country of ref document: DE Date of ref document: 19990812 |
|
| EN | Fr: translation not filed | ||
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20000808 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20001027 Year of fee payment: 7 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010921 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020501 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |