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EP3052239A1 - Method for operating an installation comprising at least one assembly with a rotating surface - Google Patents

Method for operating an installation comprising at least one assembly with a rotating surface

Info

Publication number
EP3052239A1
EP3052239A1 EP14781063.4A EP14781063A EP3052239A1 EP 3052239 A1 EP3052239 A1 EP 3052239A1 EP 14781063 A EP14781063 A EP 14781063A EP 3052239 A1 EP3052239 A1 EP 3052239A1
Authority
EP
European Patent Office
Prior art keywords
wear
rotating surface
operating
plant
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14781063.4A
Other languages
German (de)
French (fr)
Other versions
EP3052239B1 (en
Inventor
Reinhard Giesemann
Richard Erpelding
Uwe Bendig
Dirk Dilly
Dirk Schefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp Industrial Solutions AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp Industrial Solutions AG
Publication of EP3052239A1 publication Critical patent/EP3052239A1/en
Application granted granted Critical
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Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • 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
    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • 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
    • 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
    • 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
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like

Definitions

  • the invention relates to a method for operating a system with at least one unit, which has a rotating surface, which wears increasingly during operation of the system, wherein the state of wear of the rotating surface is determined and evaluated.
  • the aggregate is in particular a grinding roller, as used for example in a roller press.
  • these may also be, for example, races of circumferentially mounted cylinders, such as roller mills or rotary kilns.
  • cylindrical cylindrical carbide pins are very often used in practice, which are introduced into a soft matrix and form an autogenous wear protection layer with the millbase.
  • Such roll mills are used in the grinding of limestone, dolomite or other brittle materials, such as in the processing of ore.
  • CONFIRMATION COPY Roll basic body which is equipped with a plurality of profiled bodies. Furthermore, a monitoring device is provided which checks the state of wear of the plurality of profile body and detects any wear early. From this, a wear prognosis of the roll surface is derived so that the next reprocessing can be planned in good time so that unnecessary downtimes are avoided.
  • the invention is based on the object of a method for operating a system with at least one unit, which has a rotating surface, which wears during operation of the system increasingly wear indicate, which allows a more economical operation of the system.
  • the object is achieved in that the state of wear of the rotating surface is determined and evaluated, depending on the state of wear of the rotating surface is given a trade instruction for a modified, adapted to the determined state of wear of the rotating surface further operation of the system.
  • the present invention takes a different approach by adapting the further mode of operation of the unit to the state of wear. While this may not allow the unit to run at its original capacity, it will, in many cases, be more economical, the unit to drive with reduced power, as an alternative to allow another too fast wear, which then leads to premature shutdown of the plant.
  • the present invention enables a continuous overall optimization of the crushing system, in which the wear progress is continuously included in the optimization of the overall process as a parameter.
  • the state of wear during operation of the system is determined. If the unit is serviced or repaired at predetermined intervals, it is provided according to a further embodiment of the invention that the further operating mode of the installation adapted to the determined state of wear of the rotating surface is set so that the remaining running time of the unit remains until the scheduled period of maintenance or repair is adjusted. This is particularly useful especially when premature repair or maintenance is not possible and premature wear of the surface would result in a prolonged downtime of the unit.
  • the present invention takes into account the knowledge that the speed at which the rotating surface wears depends on the operation of the system.
  • the plant is used for the comminution of lumpy material, wherein it may be in the at least one unit in particular a grinding roller.
  • the plant can be operated as a roller press with two designed as grinding rollers units.
  • the further mode of operation of the system which is adapted to the determined state of wear of the rotating surface can in particular consist of a change in the rotational speed of the rotating surface.
  • the system consists of at least one grinding roller and optionally has an upstream screening stage and / or crushing stage for the pretreatment of shredding material and possibly an upstream bunker for intermediate storage of the material to be shredded and optionally a pressing device on
  • the adapted further operation of the system can be carried out by one or more of the following process steps:
  • Fig. 1 is a side view of a roller press with
  • FIG. 1 is a plan view of the roller press of FIG. 1,
  • Fig. 5 is a schematic representation of a system with a roller press and a Vorbunker for intermediate storage of the shredded
  • FIGS. 1 and 2 In the darg Robinson in FIGS. 1 and 2 plant for crushing lumpy material, such as limestone or ore, it is a roller press with two trained as grinding rollers units 1 and 2, in a known per se with a pressing device 3 are pressed against each other. Via spacers 4, a predetermined grinding gap 5 is maintained.
  • the two units 1, 2 and the pressing device 3 are arranged for this purpose in a machine frame comprising a base frame 6, pressure bar 7 and upper straps 8.
  • the pressing device 3 has a hydropneumatic adjusting element 9, which is operated with gas and oil and is acted upon to produce the grinding pressure accordingly.
  • the two formed as grinding rollers units 1, 2 are driven in opposite directions by not shown drives, wherein the comminuted, particulate material is fed to the grinding gap 5.
  • the units 1, 2 have rotating surfaces (peripheral surfaces la, 2a), which are usually provided with a suitable anti-wear layer.
  • This wear protection layer can for example be composed of full-surface applied wear protection segments.
  • Fig. 3a shows the state of an unworn aggregate.
  • FIGS. 3b, 3c and 3d different wear profiles are shown, wherein the aggregate according to FIG. 3b is partially worn, in FIG. 3c it is worn in a contoured manner and in FIG. 3d the roller surface has partially broken away
  • the monitoring devices 10, 11 are preferably designed so that they can carry out monitoring of the rotating surfaces 1a, 2a during the grinding operation. In this way, the increasing wear can be detected in time, so that the operation of the system can be adapted to the determined state of wear. If the repair and maintenance of the units 1 and 2 at predetermined intervals, the operation of the roller press to the determined state of wear of the rotating surfaces 1 a and 2 a is adjusted so that the system can be operated until the scheduled maintenance and repair interval time. Under certain circumstances, this can lead to a slightly reduced throughput of the roller press due to the changed operating mode. Without adjustment, the operation may need to be stopped prematurely, resulting in a lower overall throughput.
  • a more economical mode of operation of the system results from the fact that the operation of the system is adapted to the state of wear of the rotating surface.
  • a change in the rotational speed of the grinding rollers and an adaptation of the grinding pressure by the pressing device come into consideration as measures.
  • the adjustment of the grinding pressure can be realized in particular by a change in the ratio of gas pressure to oil pressure in the hydropneumatic adjustment accordingly 9.
  • a pre-bunker 101 for intermediate storage of the material to be comminuted in addition to the roll press 100, a pre-bunker 101 for intermediate storage of the material to be comminuted, a screening stage 102 and a crushing stage 103 for pre-treatment of the material 104 to be comminuted are provided.
  • the intermediately stored in Vorbunker 101, to be crushed material 104 first passes into the screening stage 102, wherein the fine fraction passes directly into a feed slot 105 of the roller press 100 and the coarse material on the crushing stage 103 there.
  • the wear rate of the grinding rolls of the roll press 100 depends inter alia on the grain size or grain composition of the material to be shredded. Displacement of a portion of the crushing work of roller press 100 to crushing stage 103 therefore has a direct impact on the speed at which the rotating surface of the aggregates of the roller mill wears.
  • FIG. 5 shows a plant in which material 4 to be comminuted passes directly from a pre-bunker 101 to the roller press 100 without it having previously passed through a screening or crushing stage.
  • the flow of material from the Vorbunker 101 is influenced by the position of sliders 106.
  • the amount of the roller press 100 supplied material is regulated accordingly.
  • An increased wear on the rotating surface la, 2a of the grinding rollers can be caused by a too low mass flow of the material to be crushed, as in this case instead of a comminution comminution increasingly takes place a single grain size reduction.
  • An increase in the mass flow through a corresponding position of the slide 106 can therefore bring about an improvement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Mechanical Control Devices (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Harvester Elements (AREA)

Abstract

The invention relates to a method for operating an installation comprising at least one assembly with a rotating surface, said surface being subject to an increasing degree of wear during operation of the installation and the wear condition of the rotating surface being determined and evaluated. Depending on the wear condition of the rotating surface, instructions are issued for a modified continued operating mode of the installation, said mode being adapted to the determined wear condition of the surface.

Description

Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat, das eine rotierende Oberfläche aufweist  A method of operating a plant having at least one aggregate having a rotating surface
Die Erfindung betrifft ein Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat, das eine rotierende Oberfläche aufweist, die während des Betriebs der Anlage in zunehmendem Maße verschleißt, wobei der Verschleißzustand der rotierenden Oberfläche ermittelt und ausgewertet wird. The invention relates to a method for operating a system with at least one unit, which has a rotating surface, which wears increasingly during operation of the system, wherein the state of wear of the rotating surface is determined and evaluated.
Bei dem Aggregat handelt es sich insbesondere um eine Mahlwalze, wie sie beispielsweise in einer Walzenpresse zum Einsatz kommt. Es kann sich hierbei aber beispielsweise auch um Laufringe von umfangsgelagerten Zylindern, wie Rollenmühlen oder Drehrohröfen handeln. The aggregate is in particular a grinding roller, as used for example in a roller press. However, these may also be, for example, races of circumferentially mounted cylinders, such as roller mills or rotary kilns.
Bei Walzenmühlen werden die Walzenoberflächen, insbesondere bei Walzenpressen, vielfach mit Profilkörpern geschützt. Hierzu werden in der Praxis sehr häufig zylindrische Hartmetallstifte verwendet, die in eine weiche Grundmatrix eingebracht werden und mit dem Mahlgut eine autogene Verschleißschutzschicht bilden. Derartige Walzenmühlen kommen bei der Mahlung von Kalkstein, Dolomit oder anderen spröden Materialien, wie bei der Aufbereitung von Erz, zum Einsatz. In roll mills, the roll surfaces, especially in roller presses, are often protected with profiled bodies. For this purpose, cylindrical cylindrical carbide pins are very often used in practice, which are introduced into a soft matrix and form an autogenous wear protection layer with the millbase. Such roll mills are used in the grinding of limestone, dolomite or other brittle materials, such as in the processing of ore.
Üblicherweise werden derartige Walzenmühlen in regelmäßigen Abständen von beispielsweise 12 Monaten wiederaufbereitet. Aus Wirtschaftlichkeitsgründen sind Stillstandszeiten bei den im Regelfall sehr großen Mühlen möglichst gering zu halten. Durch lokal erhöhten Verschleiß oder durch den Verlust einzelner Hartmetallstifte kann es aber zu verstärkten Auswaschungen an diesen Stellen kommen, sodass der Grundwerkstoff des Walzengrundkörpers irreparabel beschädigt wird und eine erneute Wiederaufbereitung nicht mehr möglich ist und die komplette Walze aufbereitet oder sogar ausgetauscht werden muss. In der Praxis werden daher regelmäßige visuelle Kontrollen durchgeführt. Usually, such roll mills are recycled at regular intervals, for example, 12 months. For reasons of economy, downtimes in the usually very large mills are to be kept as low as possible. By locally increased wear or by the loss of individual carbide pins but it can lead to increased erosion at these points, so that the base material of the roller body is irreparably damaged and a renewed reprocessing is no longer possible and the complete roller processed or even replaced. In practice, therefore, regular visual checks are carried out.
Aus der DE 10 2007 004 004 A I ist eine Walzenmühle mit zwei gegenläufig angetriebenen Mahlwalzen bekannt, wobei jede Mahlwalze einen From DE 10 2007 004 004 A I, a roller mill with two counter-rotating grinding rollers is known, each grinding roller a
BESTÄTIGUNGSKOPIE Walzengrundkörper aufweist, der mit einer Vielzahl von Profilkörpern bestückt ist. Weiterhin ist eine Überwachungsvorrichtung vorgesehen, die den Verschleißzustand der Vielzahl der Profilkörper überprüft und einen etwaigen Verschleiß frühzeitig erkennt. Hieraus wird eine Verschleißprognose der Walzenoberfläche abgeleitet, um die nächste Wiederaufarbeitung rechtzeitig einplanen zu können, sodass unnötige Stillstandszeiten vermieden werden. CONFIRMATION COPY Roll basic body which is equipped with a plurality of profiled bodies. Furthermore, a monitoring device is provided which checks the state of wear of the plurality of profile body and detects any wear early. From this, a wear prognosis of the roll surface is derived so that the next reprocessing can be planned in good time so that unnecessary downtimes are avoided.
Da die Wiederaufbereitung einer Mahlwalze nur mit einem relativ großen Aufwand möglicht ist, der vielfach auch den Transport zu zentralen Aufbereitungsstationen erfordert, sind die üblichen Wiederaufbereitungsintervalle bereits mit längerem Vorlauf terminiert, sodass eine nicht eingeplante Aufbereitung oft nicht zeitnah durchgeführt werden kann. Zum anderen sind vorzeitige Wiederaufbereitungen der Mahlwalze auch aus wirtschaftlicher Sicht möglichst zu vermeiden. Man begnügt sich daher vielfach mit der Ausbesserung einzelner Stellen, die vor Ort durchgeführt werden können. Since the reprocessing of a grinding roller is possible only with a relatively large effort, which often requires the transport to central processing stations, the usual reprocessing intervals are already terminated with a long lead, so that an unscheduled treatment can often not be carried out promptly. On the other hand, premature reprocessing of the grinding roller should also be avoided as far as possible from an economic point of view. It is therefore often sufficient to repair individual sites that can be carried out on site.
Der Erfindung liegt nun die Aufgabe zugrunde ein Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat, das eine rotierende Oberfläche aufweist, die während des Betriebs der Anlage in zunehmendem Maße verschleißt, anzugeben, das eine wirtschaftlichere Betriebsweise der Anlage ermöglicht. The invention is based on the object of a method for operating a system with at least one unit, which has a rotating surface, which wears during operation of the system increasingly wear indicate, which allows a more economical operation of the system.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass der Verschleißzustand der rotierenden Oberfläche ermittelt und ausgewertet wird, wobei in Abhängigkeit des Verschleißzustandes der rotierenden Oberfläche eine Handelsanweisung für eine geänderte, an den ermittelten Verschleißzustand der rotierenden Oberfläche angepasste weitere Betriebsweise der Anlage gegeben wird. According to the invention the object is achieved in that the state of wear of the rotating surface is determined and evaluated, depending on the state of wear of the rotating surface is given a trade instruction for a modified, adapted to the determined state of wear of the rotating surface further operation of the system.
Während man bisher lediglich eine Verschleißprognose angegeben hat bzw. das Aggregat ggf. vorzeitig repariert oder aufbereitet hat, schlägt die vorliegende Erfindung einen anderen Weg ein, indem sie die weitere Betriebsweise des Aggregates an den Verschleißzustand anpasst. Auf diese Weise kann zwar möglicherweise das Aggregat nicht mehr mit der ursprünglichen Leistung gefahren werden, jedoch wird es in vielen Fällen dennoch wirtschaftlicher sein, das Aggregat mit reduzierter Leistung zu fahren, als alternativ einen weiteren zu schnellen Verschleiß zuzulassen, der dann zu einen vorzeitigen Stillstand der Anlage führt. While hitherto only a wear prognosis has been stated or the unit has possibly been prematurely repaired or prepared, the present invention takes a different approach by adapting the further mode of operation of the unit to the state of wear. While this may not allow the unit to run at its original capacity, it will, in many cases, be more economical, the unit to drive with reduced power, as an alternative to allow another too fast wear, which then leads to premature shutdown of the plant.
Weiterhin ermöglicht die vorliegende Erfindung eine kontinuierliche Gesamtoptimierung des Zerkleinerungssystems, in dem der Verschleißfortschritt kontinuierlich in die Optimierung des Gesamtprozesses als Parameter eingeht. Furthermore, the present invention enables a continuous overall optimization of the crushing system, in which the wear progress is continuously included in the optimization of the overall process as a parameter.
Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Further embodiments of the invention are the subject of the dependent claims.
Gemäß einer bevorzugten Ausgestaltung der Erfindung wird der Verschleißzustand im laufenden Betrieb der Anlage ermittelt. Wird das Aggregat in vorgegebenen Intervalle gewartet oder repariert, ist gemäß einer weiteren Ausgestaltung der Erfindung vorgesehen, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche angepasste weitere Betriebsweise der Anlage so eingestellt wird, dass die Restlaufzeit des Aggregats an den verbleibenden Zeitraum bis zur vorgesehenen Wartung oder Reparatur angepasst ist. Dies ist vor allem dann besonders zweckmäßig, wenn eine vorzeitige Reparatur oder Wartung nicht möglich ist und ein vorzeitiger Verschleiß der Oberfläche zu einer verlängerten Stillstandszeit des Aggregats führen würde. Die vorliegende Erfindung berücksichtigt dabei die Erkenntnis, dass die Geschwindigkeit, mit der die rotierende Oberfläche verschleißt von der Betriebsweise der Anlage abhängt. According to a preferred embodiment of the invention, the state of wear during operation of the system is determined. If the unit is serviced or repaired at predetermined intervals, it is provided according to a further embodiment of the invention that the further operating mode of the installation adapted to the determined state of wear of the rotating surface is set so that the remaining running time of the unit remains until the scheduled period of maintenance or repair is adjusted. This is particularly useful especially when premature repair or maintenance is not possible and premature wear of the surface would result in a prolonged downtime of the unit. The present invention takes into account the knowledge that the speed at which the rotating surface wears depends on the operation of the system.
Gemäß einer bevorzugten Ausgestaltung der Erfindung dient die Anlage zur Zerkleinerung von stückigem Material, wobei es sich bei dem wenigstens einen Aggregat insbesondere um eine Mahlwalze handeln kann. Die Anlage kann dabei als Walzenpresse mit zwei als Mahlwalzen ausgebildeten Aggregaten betrieben werden. According to a preferred embodiment of the invention, the plant is used for the comminution of lumpy material, wherein it may be in the at least one unit in particular a grinding roller. The plant can be operated as a roller press with two designed as grinding rollers units.
Die an den ermittelten Verschleißzustand der rotierenden Oberfläche angepasste weitere Betriebsweise der Anlage kann insbesondere in einer Veränderung der Drehzahl der rotierenden Oberfläche bestehen. The further mode of operation of the system which is adapted to the determined state of wear of the rotating surface can in particular consist of a change in the rotational speed of the rotating surface.
Besteht die Anlage aus wenigstens einer Mahlwalze und weist ggf. eine vorgeschaltete Siebstufe und/oder Brechstufe zur Vorbehandlung des zu zerkleinernden Materials und ggf. einen vorgeschalteten Bunker zur Zwischenlagerung des zu zerkleinernden Materials sowie ggf. eine Anpresseinrichtung auf, kann die angepasste weitere Betriebsweise der Anlage durch einen oder mehrere der nachfolgend aufgeführten Verfahrensschritte erfolgen: If the system consists of at least one grinding roller and optionally has an upstream screening stage and / or crushing stage for the pretreatment of shredding material and possibly an upstream bunker for intermediate storage of the material to be shredded and optionally a pressing device on, the adapted further operation of the system can be carried out by one or more of the following process steps:
- Veränderung der Einstellung der Siebstufe und/oder Brechstufe, Changing the setting of the screening stage and / or crushing stage,
Beeinflussung des Materialsflusses aus dem Vorbunker durch Veränderung der Stellung eines Schiebers, Influencing the material flow from the Vorbunker by changing the position of a slider,
Veränderung der dem zu zerkleinernden, stückigen Material einzupritzenden Wassermenge, Change in the amount of water to be crushed, lumpy material,
Veränderung einer dem zu zerkleinernden, stückigen Material zuzugebenden Mahlhilfsmittelmenge, Change in a grinding aid amount to be added to the crushed, lumpy material,
Veränderung des Anpressdrucks wenigstens einer Mahlwalze, Change in the contact pressure of at least one grinding roller,
Veränderung des Verhältnisses vom Gasdruck zu Öldruck eines mit Gas und Öl betriebenen, hydropneumatischen Verstellelements einer Anpresseinrichtung sowie Change in the ratio of gas pressure to oil pressure of a operated with gas and oil, hydropneumatic adjustment of a pressing device and
Veränderung der Zuführmenge des zu zerkleinernden, stückigem Materials. Change in the supply amount of the comminuted, lumpy material.
Weitere Vorteile und Ausgestaltungen der Erfindung werden anhand nachfolgenden Beschreibung und der Zeichnung näher erläutert. Further advantages and embodiments of the invention will be explained in more detail with reference to the following description and the drawing.
In der Zeichnung zeigen In the drawing show
Fig. 1 eine Seitenansicht einer Walzenpresse mit Fig. 1 is a side view of a roller press with
Überwachungsvorrichtung,  Monitoring device
Fig. 2 eine Draufsicht der Walzenpresse gemäß Fig. 1 , 2 is a plan view of the roller press of FIG. 1,
Fig. 3a-3d verschiedene Verschleißprofile einer Mahlwalze, Fig.4 schematische Darstellung einer Anlage mit einer Walzenpresse und einer vorgeschalteten Sieb- und Brechstufe und 3a-3d different wear profiles of a grinding roller, 4 shows a schematic representation of a plant with a roller press and an upstream screening and crushing stage and
Fig. 5 eine schematische Darstellung einer Anlage mit einer Walzenpresse und einem Vorbunker zur Zwischenlagerung des zu zerkleinerndenFig. 5 is a schematic representation of a system with a roller press and a Vorbunker for intermediate storage of the shredded
Materials. Material.
Bei der in den Fig. 1 und 2 dargstellten Anlage zur Zerkleinerung von stückigem Material, wie beispielsweise Kalkstein oder Erzmaterial, handelt es sich um eine Walzenpresse mit zwei als Mahlwalzen ausgebildeten Aggregaten 1 und 2, die in an sich bekannte Art und Weise mit einer Anpresseinrichtung 3 gegeneinander gepresst werden. Über Abstandshalter 4 wird ein vorgegebener Mahlspalt 5 aufrechterhalten. Die beiden Aggregate 1 , 2 und die Anpresseinrichtung 3 sind hierzu in einem Maschinenrahmen angeordnet, der einen Grundrahmen 6, Druckbalken 7 und Obergurte 8 umfasst. Die Anpresseinrichtung 3 weist ein hydropneumatisches Verstellelement 9 auf, dass mit Gas und Öl betrieben wird und zur Erzeugung des Mahldrucks entsprechend beaufschlagt wird. In the dargstellten in FIGS. 1 and 2 plant for crushing lumpy material, such as limestone or ore, it is a roller press with two trained as grinding rollers units 1 and 2, in a known per se with a pressing device 3 are pressed against each other. Via spacers 4, a predetermined grinding gap 5 is maintained. The two units 1, 2 and the pressing device 3 are arranged for this purpose in a machine frame comprising a base frame 6, pressure bar 7 and upper straps 8. The pressing device 3 has a hydropneumatic adjusting element 9, which is operated with gas and oil and is acted upon to produce the grinding pressure accordingly.
Die beiden als Mahlwalzen ausgebildeten Aggregate 1 , 2 werden über nicht näher dargestellte Antriebe gegenläufig angetrieben, wobei das zu zerkleinernde, stückige Material dem Mahlspalt 5 zugeführt wird. Die Aggregate 1, 2 weisen rotierende Oberflächen (Umfangsflächen la, 2a) auf, die üblicherweise mit einer geeigneten Verschleißschutzschicht versehen sind. Diese Verschleißschutzschicht kann beispielsweise aus vollflächig aufgebrachten Verschleißschutzsegmenten zusammengesetzt werden. Weiterhin ist es auch bekannt, die Verschleißschutzschicht durch eine Vielzahl von mit Abstand voneinander angeordneten, stiftförmigen Profilkörpern zu bilden, zwischen denen sich eine autogene Verschleißschutzschicht aus zu zerkleinerndem Material ausbildet. Wie auch immer die rotierende Oberfläche ausgebildet ist, kommt es im Mahlbetrieb zu einem Verschleiß, der für jedes Aggregat 1, 2 über wenigstens eine zugehörige Überwachungseinrichtung 10 bzw. 1 1 erfasst und ausgewertet wird. Fig. 3a zeigt den Zustand eines unverschlissenen Aggregats. In den Fig. 3b, 3c und 3d sind verschiedene Verschleißprofile dargestellt, wobei das Aggregat gemäß Fig. 3b teilverschlissen ist, in Fig. 3c konturfÖrmig verschlissen ist und in Fig. 3d die Walzenoberfläche teilweise ausgebrochen ist. The two formed as grinding rollers units 1, 2 are driven in opposite directions by not shown drives, wherein the comminuted, particulate material is fed to the grinding gap 5. The units 1, 2 have rotating surfaces (peripheral surfaces la, 2a), which are usually provided with a suitable anti-wear layer. This wear protection layer can for example be composed of full-surface applied wear protection segments. Furthermore, it is also known to form the wear protection layer by a plurality of spaced-apart, pin-shaped profile bodies, between which an autogenous wear protection layer of material to be comminuted is formed. Whatever the rotating surface is formed, it comes in grinding operation to wear, which is detected and evaluated for each unit 1, 2 via at least one associated monitoring device 10 or 1 1. Fig. 3a shows the state of an unworn aggregate. In FIGS. 3b, 3c and 3d, different wear profiles are shown, wherein the aggregate according to FIG. 3b is partially worn, in FIG. 3c it is worn in a contoured manner and in FIG. 3d the roller surface has partially broken away.
Die Überwachungseinrichtungen 10, 1 1 sind vorzugsweise so ausgelegt, dass sie eine Überwachung der rotierenden Oberflächen la, 2a während des Mahlbetriebes durchfuhren können. Auf diese Weise kann der zunehmende Verschleiß rechtzeitig erkannt werden, sodass die Betriebsweise der Anlage an den ermittelten Verschleißzustand angepasst werden kann. Erfolgt die Reparatur und Wartung der Aggregate 1 und 2 in vorgegebenen Intervallen wird die Betriebsweise der Walzenpresse an den ermittelten Verschleißzustand der rotierenden Oberflächen 1 a und 2a derart angepasst, dass die Anlage bis zum vorgesehenen Wartung- und Reparaturintervallzeitpunkt betrieben werden kann. Dies kann unter Umständen dazu führen, dass der Durchsatz der Walzenpresse ggf. durch die geänderte Betriebsweise etwas reduziert wird. Ohne Anpassung müsste der Betrieb ggf. vorzeitig eingestellt werden, wodurch sich insgesamt ein niedrigerer Gesamtdurchsatz ergeben würde. Eine wirtschaftlichere Betriebsweise der Anlage ergibt sich daher dadurch, dass die Betriebsweise der Anlage an den Verschleißzustand der rotierenden Oberfläche angepasst wird. Als Maßnahmen kommen dabei insbesondere eine Veränderung der Drehzahl der Mahlwalzen und eine Anpassung des Mahldrucks durch die Anpresseinrichtung in Betracht. Die Anpassung des Mahldrucks kann dabei insbesondere durch eine Veränderung des Verhältnisses von Gasdruck zu Öldruck im hydropneumatischen Verstell dement 9 verwirklicht werden. The monitoring devices 10, 11 are preferably designed so that they can carry out monitoring of the rotating surfaces 1a, 2a during the grinding operation. In this way, the increasing wear can be detected in time, so that the operation of the system can be adapted to the determined state of wear. If the repair and maintenance of the units 1 and 2 at predetermined intervals, the operation of the roller press to the determined state of wear of the rotating surfaces 1 a and 2 a is adjusted so that the system can be operated until the scheduled maintenance and repair interval time. Under certain circumstances, this can lead to a slightly reduced throughput of the roller press due to the changed operating mode. Without adjustment, the operation may need to be stopped prematurely, resulting in a lower overall throughput. A more economical mode of operation of the system results from the fact that the operation of the system is adapted to the state of wear of the rotating surface. In particular, a change in the rotational speed of the grinding rollers and an adaptation of the grinding pressure by the pressing device come into consideration as measures. The adjustment of the grinding pressure can be realized in particular by a change in the ratio of gas pressure to oil pressure in the hydropneumatic adjustment accordingly 9.
Bei der Anlage gemäß Fig. 4 ist neben der Walzenpresse 100 ein Vorbunker 101 zur Zwischenlagerung des zu zerkleinernden Materials, eine Siebstufe 102 und ein Brechstufe 103 zur Vorbehandlung des zu zerkleinernden Material 104 vorgesehen. Das im Vorbunker 101 zwischengelagerte, zu zerkleinernde Material 104 gelangt zunächst in die Siebstufe 102, wobei der Feinanteil direkt in einen Aufgabeschacht 105 der Walzenpresse 100 und das Grobmaterial über die Brechstufe 103 dorthin gelangt. Die Verschleißgeschwindigkeit der Mahlwalzen der Walzenpresse 100 hängt unter anderem auch von der Korngröße bzw. Kornzusammensetzung des zu zerkleinernden Gutes ab. Eine Verlagerung eines Teils der Zerkleinerungsarbeit von Walzenpresse 100 zur Brechstufe 103 hat daher unmittelbaren Einfluss auf die Geschwindigkeit, mit der die rotierende Oberfläche der Aggregate der Walzenmühle verschleißt. 4, in addition to the roll press 100, a pre-bunker 101 for intermediate storage of the material to be comminuted, a screening stage 102 and a crushing stage 103 for pre-treatment of the material 104 to be comminuted are provided. The intermediately stored in Vorbunker 101, to be crushed material 104 first passes into the screening stage 102, wherein the fine fraction passes directly into a feed slot 105 of the roller press 100 and the coarse material on the crushing stage 103 there. The wear rate of the grinding rolls of the roll press 100 depends inter alia on the grain size or grain composition of the material to be shredded. Displacement of a portion of the crushing work of roller press 100 to crushing stage 103 therefore has a direct impact on the speed at which the rotating surface of the aggregates of the roller mill wears.
Fig. 5 zeigt eine Anlage, bei das zu zerkleinernde Material 4 direkt aus einem Vorbunker 101 zur Walzenpresse 100 gelangt, ohne dass es vorher eine Sieb- oder Brechstufe durchläuft. Der Materialfluss aus dem Vorbunker 101 wird durch die Stellung von Schiebern 106 beeinflusst. Damit wird auch die Menge des der Walzenpresse 100 zugeführten Materials entsprechend geregelt. Ein erhöhter Verschleiß an den rotierenden Oberfläche la, 2a der Mahlwalzen kann durch einen zu geringen Massenstrom des zu zerkleinernden Materials verursacht werden, da in diesem Fall statt einer Gutbettzerkleinerung vermehrt eine Einzelkornzerkleinerung stattfindet. Eine Erhöhung des Massenstroms durch eine entsprechende Stellung des Schiebers 106 kann daher eine Verbesserung bewirken. FIG. 5 shows a plant in which material 4 to be comminuted passes directly from a pre-bunker 101 to the roller press 100 without it having previously passed through a screening or crushing stage. The flow of material from the Vorbunker 101 is influenced by the position of sliders 106. Thus, the amount of the roller press 100 supplied material is regulated accordingly. An increased wear on the rotating surface la, 2a of the grinding rollers can be caused by a too low mass flow of the material to be crushed, as in this case instead of a comminution comminution increasingly takes place a single grain size reduction. An increase in the mass flow through a corresponding position of the slide 106 can therefore bring about an improvement.

Claims

Patentansprüche claims
1. Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat (1, 2), das eine rotierende Oberfläche aufweist, die während des Betriebs der Anlage in zunehmendem Maße verschleißt, wobei der Verschleißzustand der rotierenden Oberfläche (l a, 2a) ermittelt und ausgewertet wird, wobei in Abhängigkeit des Verschleißzustandes der rotierenden Oberfläche (la, 2a) eine Handlungsanweisung für eine geänderte, an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage gegeben wird, dadurch gekennzeichnet, dass das Aggregat in vorgegebenen Intervallen gewartet oder repariert wird und die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage so eingestellt wird, dass die Restlaufzeit des Aggregats an den verbleibenden Zeitraum bis zur vorgesehenen Wartung oder Reparatur angepasst ist. A method of operating a plant having at least one aggregate (1, 2) having a rotating surface that increasingly wears during operation of the plant, wherein the state of wear of the rotating surface (1a, 2a) is determined and evaluated, wherein, depending on the state of wear of the rotating surface (1a, 2a), an instruction for a modified, to the determined state of wear of the rotating surface (la, 2a) adapted further operation of the plant is given, characterized in that the unit is maintained at predetermined intervals or is repaired and adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the system is adjusted so that the remaining life of the unit is adapted to the remaining period until the scheduled maintenance or repair.
2. Verfahren zum Betreiben einer Anlage nach Anspruch 1 , dadurch gekennzeichnet, dass der Verschleißzustand im laufenden Betrieb der Anlage ermittelt wird. 2. A method for operating a system according to claim 1, characterized in that the state of wear is determined during operation of the system.
3. Verfahren zum Betreiben einer Anlage nach Anspruch 1 oder 2, wobei die Geschwindigkeit, mit der die rotierende Oberfläche (la, 2a) verschleißt, von der Betriebsweise der Anlage abhängt. 3. A method for operating a plant according to claim 1 or 2, wherein the speed at which the rotating surface (1a, 2a) wears depends on the operation of the plant.
4. Verfahren zum Betreiben einer Anlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Anlage zur Zerkleinerung von stückigem Material dient. 4. A method for operating a plant according to claim 1 or 2, characterized in that the plant is used for crushing of lumpy material.
5. Verfahren zum Betreiben einer Anlage nach Anspruch 3, dadurch gekennzeichnet, dass es sich bei dem wenigstens einen Aggregat (1 , 2) um eine Mahlwalze handelt. 5. A method for operating a plant according to claim 3, characterized in that it is the at least one unit (1, 2) is a grinding roller.
6. Verfahren zum Betreiben einer Anlage nach Anspruch 1 , dadurch gekennzeichnet, dass die Anlage als Walzenpresse (100) mit zwei als Mahlwalzen ausgebildeten Aggregaten (1, 2) betrieben wird. 6. A method for operating a plant according to claim 1, characterized in that the plant as a roller press (100) with two units designed as grinding rollers units (1, 2) is operated.
7. Verfahren zum Betreiben einer Anlage nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der Drehzahl der rotierenden Oberfläche (la, 2a) besteht. 7. A method for operating a system according to one or more of claims 1 to 6, characterized in that adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the system in a change in the rotational speed of the rotating surface (la, 2a).
8. Verfahren zum Betreiben einer Anlage nach Anspruch 3 oder 5, dadurch gekennzeichnet, dass die Anlage mit einer der wenigstens einen Mahlwalze vorgeschalteten Siebstufe und/oder Brechstufe ( 102, 103) zur Vorbehandlung des zu zerkleinernden Materials (104) betrieben wird und die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der Einstellung der Siebstufe (102) und/oder Brechstufe (103) besteht. 8. A method for operating a plant according to claim 3 or 5, characterized in that the plant with one of the at least one grinding roller upstream screening stage and / or crushing stage (102, 103) for pretreatment of the material to be crushed (104) is operated and the the determined state of wear of the rotating surface (la, 2a) adapted further operation of the system in a change in the setting of the screening stage (102) and / or crushing stage (103).
9. Verfahren zum Betreiben einer Anlage nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Anlage mit einem der wenigstens einen Mahlwalze vorgeschalteten Vorbunker (101) zur Zwischenlagerung des zu zerkleinernden Materials (104) betrieben wird, wobei der Materialfluss aus dem Vorbunker (101) durch die Stellung eines Schiebers (106) beeinflusst wird und die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der Stellung des Schiebers (106) besteht. 9. A method for operating a plant according to claim 4 or 5, characterized in that the system with one of the at least one grinding roller upstream Vorbunker (101) for temporary storage of the material to be crushed (104) is operated, the material flow from the Vorbunker (101 ) is influenced by the position of a slide (106) and the further mode of operation of the system adapted to the determined state of wear of the rotating surface (1a, 2a) consists of a change in the position of the slide (106).
10. Verfahren zum Betreiben einer Anlage nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (l a, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der dem zu zerkleinernden stückigen Material eingespritzten Wassermenge besteht. 10. A method for operating a plant according to claim 3, 4 or 5, characterized in that the adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the system consists in a change in the injected to be crushed lumpy material amount of water.
1 1. Verfahren zum Betreiben einer Anlage nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung einer dem zu zerkleinernden, stückigen Material zuzugebenden Mahlhilfsmittelmenge besteht. 1 1. A method for operating a plant according to claim 3, 4 or 5, characterized in that adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the plant in a change in the grinding material to be crushed to be added, particulate material consists.
12. Verfahren zum Betreiben einer Anlage nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung des Anpressdrucks wenigstens einer Mahlwalze besteht. 12. A method for operating a plant according to claim 4 or 5, characterized in that adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the system consists in a change in the contact pressure of at least one grinding roller.
13. Verfahren zum Betreiben einer Anlage nach Anspruch 6, dadurch gekennzeichnet, dass der Mahldruck zwischen den beiden Mahlwalzen durch eine Anpresseinrichtung (3) aufgebaut wird, die wenigstens ein mit Gas und Öl betriebenes, hydropneumatisches Verstellelement (9) aufweist und die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise (la, 2a) der Anlage in einer Veränderung des Verhältnisses von Gasdruck zu Öldruck besteht. 13. A method for operating a plant according to claim 6, characterized in that the grinding pressure between the two grinding rollers by a pressing device (3) is constructed, which has at least one operated with gas and oil, hydropneumatic adjusting element (9) and at the determined Wear state of the rotating surface (la, 2a) adapted further mode of operation (la, 2a) of the system consists in a change in the ratio of gas pressure to oil pressure.
14. Verfahren zum Betreiben einer Anlage nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der Materialverteilung und/oder des Massenstroms des zu zerkleinernden, stückigen Materials besteht. 14. A method for operating a plant according to claim 4 or 5, characterized in that the adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the plant in a change in the material distribution and / or the mass flow of the comminuted, lumpy Material exists.
15. Verfahren zum Betreiben einer Anlage nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die an den ermittelten Verschleißzustand der rotierenden Oberfläche (la, 2a) angepasste weitere Betriebsweise der Anlage in einer Veränderung der Zufuhrmenge des zu zerkleinernden, stückigen Materials besteht. 15. A method for operating a plant according to claim 4 or 5, characterized in that adapted to the determined state of wear of the rotating surface (la, 2a) further operation of the system consists in a change in the supply amount of chunky, lumpy material.
16. Verfahren zum Betreiben einer Anlage mit wenigstens einem Aggregat, das eine rotierende Oberfläche aufweist, die während des Betriebs der Anlage in zunehmendem Maße verschleißt, wobei der Verschleißzustand der rotierenden Oberfläche ermittelt und ausgewertet wird, dadurch gekennzeichnet, dass in Abhängigkeit des Verschleißzustandes der rotierenden Oberfläche eine Handlungsanweisung für eine geänderte, an den ermittelten Verschleißzustand der rotierenden Oberfläche angepasste weitere Betriebsweise der Anlage gegeben wird. 16. A method for operating a system with at least one unit having a rotating surface, which during operation of the system in Wears increasingly, wherein the state of wear of the rotating surface is determined and evaluated, characterized in that depending on the state of wear of the rotating surface an instruction for an amended, adapted to the determined state of wear of the rotating surface further operation of the system is given.
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CA2924968A1 (en) 2015-04-09
AU2014331405A1 (en) 2016-04-14
BR112016007229A2 (en) 2017-08-01
AU2014331405B2 (en) 2018-02-01
EP3052239B1 (en) 2019-04-17
PE20161087A1 (en) 2016-10-21
US20160243556A1 (en) 2016-08-25
WO2015049043A1 (en) 2015-04-09
ZA201602072B (en) 2017-07-26
CN105592926B (en) 2017-12-15
DE102013110981A1 (en) 2015-04-02
EA201690440A1 (en) 2016-09-30
DK3052239T3 (en) 2019-07-01
US10556239B2 (en) 2020-02-11
CN105592926A (en) 2016-05-18
CA2924968C (en) 2017-07-04
MX2016004048A (en) 2016-06-02
MX368561B (en) 2019-10-07
EA032792B1 (en) 2019-07-31
BR112016007229B1 (en) 2021-05-25

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