WO2015051925A1 - Procédé et dispositif de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées - Google Patents

Procédé et dispositif de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées Download PDF

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Publication number
WO2015051925A1
WO2015051925A1 PCT/EP2014/055685 EP2014055685W WO2015051925A1 WO 2015051925 A1 WO2015051925 A1 WO 2015051925A1 EP 2014055685 W EP2014055685 W EP 2014055685W WO 2015051925 A1 WO2015051925 A1 WO 2015051925A1
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WO
WIPO (PCT)
Prior art keywords
grinding
bed
rollers
roller mill
bowl
Prior art date
Application number
PCT/EP2014/055685
Other languages
German (de)
English (en)
Inventor
Dirk Van Mechelen
André BÄTZ
Andreas Jungmann
Holger Wulfert
Paul ERWERTH
Original Assignee
Loesche Gmbh
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
Priority to KR1020157013337A priority Critical patent/KR101908906B1/ko
Application filed by Loesche Gmbh filed Critical Loesche Gmbh
Priority to RU2015118815A priority patent/RU2648705C2/ru
Priority to PCT/EP2014/055685 priority patent/WO2015051925A1/fr
Priority to BR112015011596-9A priority patent/BR112015011596B1/pt
Priority to SG11201503809VA priority patent/SG11201503809VA/en
Priority to EP14712271.7A priority patent/EP2903744B1/fr
Priority to CN201480003146.XA priority patent/CN105102132B/zh
Priority to JP2017500131A priority patent/JP6522731B2/ja
Priority to TW104108709A priority patent/TWI680802B/zh
Priority to ARP150100855A priority patent/AR099817A1/es
Publication of WO2015051925A1 publication Critical patent/WO2015051925A1/fr
Priority to IL238733A priority patent/IL238733A0/en
Priority to HK15108702.5A priority patent/HK1208002A1/zh

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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
    • 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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • 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

Definitions

  • the invention relates to a method for processing and separating a material from a bonded multi-fuel system as well as a vertical roller mill for carrying out this method.
  • a separating device is known in order to crush concrete fracture and, if possible, in this case also be able to recover the individual components of the concrete.
  • the desired levels of purity of the individual recycled components such as gravel and sand can not be achieved or only under particularly favorable circumstances.
  • Essential in concrete recycling is that in particular the gravel should not be crushed in the treatment of concrete fracture, otherwise he can only be used inferior for the production of concrete.
  • roller mills which are actually pure comminution units, are used for the treatment and separation of materials.
  • Such a method is known, for example, from WO 201 1/107124 A1.
  • stainless steel slags which consist of a silicate fraction and a metal fraction, are selectively comminuted and separated from one another.
  • comminution one makes use of distinct hardness differences between the individual fractions as well as density differences in order to achieve a separation. It is essential in this method to continue to use the mill primarily as a crushing unit and to significantly reduce the abandoned raw materials, and only to achieve a separation as a secondary downstream property.
  • the necessary pressure-related comminution can be achieved with this method, a separation only if one of the components to be separated is ductile, so that it is not crushed during the grinding process.
  • the separation is made by crushing one component by the roller pressure while not crushing another one. This is possible because the component not to be shredded has ductile properties. At a slightly too high grinding pressure, this component deformed, which is unintentional, but it is still not crushed.
  • This object is achieved by a method for processing and separating a material from an associated multi-component system with the features of claim 1 and a vertical roller mill with the features of claim 13.
  • a grinding bed of machined and machined material is formed on the grinding bowl, on which the grinding rolls roll.
  • the material is separated by shear stress and abrasion of the particles of the components with each other in the first and the second component by means of grinding rollers in the grinding bed, the particles of the first component, the particles of the second component and particles of the same component each other attri - be killed.
  • the contact pressure is chosen so that directly by the surface pressure directly essentially no pressure-induced comminution of the first and / or second component is performed.
  • the preparation of the material takes place essentially only by the attrition of the material or of the particles of the first and / or second component mutually. A pressure-related crushing is not provided. If a comminution is carried out, this is done mainly by the juxtaposition of the material.
  • the roller mill is operated such that the grinding bed has a minimum height which is greater than the diameter of the particles of one of the two components. Subsequent to the in-bed attrition or the machining in the grinding bed, at least the first and the second component are removed from the processing circuit of the roller mill and sorted.
  • a basic idea of the method according to the invention can be seen in using a roller mill, in particular a vertical roller mill, no longer as a comminution unit, in which the material to be comminuted is "crushed" by the pressure of the rollers, but the roller mill, in particular that formed on the roller mill Grinding bed, for the separation and preparation of the feed material into its constituents, in particular into the first and second components, This separation and processing of the feed material takes place within the grinding bed by mutual frictional stress, ie attrition of the material.
  • Another basic idea on which the invention is based is to design the grinding bed such that it has a minimum height, which is greater than the diameter of the particles of one of the two components.
  • the harder or tougher of the two components of the joined multi-component system is selected.
  • This design of the grinding bed ensures that the harder component is not comminuted by the roller pressure.
  • it does not necessarily have to be the hardest of the components.
  • the Mahlbett Turner is at least as high as the average size of one of the components. In this way, it is ensured with sufficient likelihood that during the preparation process it does not come to a pressure-related comminution but essentially to the preparation or comminution due to attrition processes in the grinding bed, that is to say rubbing comminution.
  • the connected multicomponent system may also consist of more than the two components exemplified here.
  • the better cohesive component As a harder component can be understood in the context of the invention, the better cohesive component.
  • the preferred selected pressing force of the rollers which may alternatively be referred to as grinding rollers is selected so that a surface pressure in the range of 15 kN / m 2 to a maximum of 140 kN / m 2 occurs.
  • the contact pressure depends, among other things, on the size of the rolls, the size of the vertical mill and / or the weight of the rolls.
  • the reference pressure used here is the surface pressure, so that a guide size is available irrespective of the size of the rollers or mill.
  • the preferred range of the surface pressure depends on the materials to be processed, wherein the surface pressure is chosen so that there is essentially no pressure-related comminution of the material to be ground.
  • the invention is further based on the surprising finding that, despite the fact that the surface pressure is actually too low for the operation of a roller mill, it is possible to machine the material to be charged. This is essentially due to the fact that, in contrast to the previous operating mode of the mill, no actual grinding takes place, but the materials essentially process one another and are not processed by the rollers. This even leads to the fact that with the inventive method, a treatment and separation of materials is possible whose components have substantially no density differences.
  • the contact pressure is chosen such that, in the case of in-bed attrition, shearing forces between the particles are in the range from 5 kN / m 2 to 70 kN / m 2 , in particular between 7 kN / m 2 and 20 kN / m 2 ,
  • the ranges given for the shear forces between the particles of the various components of the bonded multi-component system allow good attrition in the grinding bed so that the processing and separation of the connected multi-component system can be carried out in the mill. This can be achieved by the existing shear forces and a sufficiently large purity of the individual components with each other, without risking excessive crushing.
  • One component that is essential in adjusting the shear forces is the contact force of the rollers. This should ideally be adjusted so that the desired shear forces occur in the grinding bed by the rotation of the grinding table in combination with the rollers and the rotation of the rollers.
  • different shear or friction forces act on the material to be processed: On the one hand, the shear and frictional forces of the individual material particles with one another; on the other hand, the shear forces that are applied to the material via the rollers.
  • the generation of shear forces is essentially due to the velocity of the particles passing under the mill compared to the peripheral speed of the roller passing the particles or past the particles.
  • the grinding bed preferably has a maximum height of 8% of the grinding bowl diameter, but preferably about 4% of the grinding bowl diameter.
  • the grinding gap that is, the distance between the grinding rollers and the grinding table or the grinding bowl, is not too large, so that the forces introduced by the grinding rollers in the grinding bed forces can be used actively for crushing the ground material.
  • the grinding gap is too large, it may happen on the one hand that the material to be ground is in some cases only compacted and thus no sufficient pressure is applied to the material to be ground, and on the other hand that the material to be ground flows out of the grinding gap, so that it displaces but does not break up becomes.
  • the Mahlbett catch is significantly higher than Wälzmühlen, which are used exclusively for grinding. Due to the higher Mahlbett dam it comes to more relative movements of the particles or components in the grinding bed with each other, so that in this way the in-bed attrition is achieved.
  • the Mahlbett dam can be adjusted by means of the contact pressure of the rollers, a feed mass flow, a Mahlschüsselformatbaum, a height of a storage edge of the grinding bowl and / or an internal circulation flow.
  • Another parameter that can be used to set the grinding bed height is the internal circulation flow. These are, in particular in roller mills with integrated sifter, the amount of particles which are rejected during the sighting and are returned to the grinding bowl for further processing. If the internal circulation flow is increased, the grinding bed height also increases.
  • the internal circulation flow can be influenced for example by means of the classifier settings as well as by means of the volume of the process air flow.
  • the material binding of the multicomponent system is increased, to increase the contact pressure, in order to achieve the necessary forces for in-bed attrition despite the increased material binding.
  • the Mahlbettiere should be kept the same, other parameters must be adjusted because the Mahlbettiere is initially reduced by the increased contact pressure.
  • the Mahlschüsselwindiere can be reduced.
  • the setting of these parameters is also possible during operation, so that if it is found, for example, in tests that the material binding of the multi-component system is higher than before, it can be responded to by the parameters specified here.
  • Another option is to increase the height of the storage area. However, this is not or only with difficulty possible during operation, so that this variation is mainly used when the roller mill used is to be switched to another multicomponent system or designed for this.
  • the mass flow rate is increased in order to increase the throughput, it is advantageous if, in particular, the grinding bowl rotational speed is increased in order to maintain the grinding bed height.
  • Increasing the contact force of the rolls would also reduce the millbase height, but this would lead to a change in the in-bed attrition variables.
  • the higher pressure force of the rollers would increase the grinding pressure, that is to say the force which is introduced into the grinding bed by means of the rollers, as a result of which the surface pressure also increases. This can lead to a poorer treatment and separation of the multicomponent system.
  • the rolling mill is operated at startup with a higher contact pressure of the rollers than the contact force selected during operation. This is necessary in order to initially set the rollers, which have a starting torque to be overcome, in rotation. Subsequently, during in-bed attrition operation, the friction between the grinding bed and grinding rolls is usually sufficient to maintain the rotation of the rolls.
  • the rotation of the rollers is monitored during operation, and the pressing force of the rollers is at least temporarily increased if too little rotation of the rollers is detected. Too low a rotation of the rolls causes the shear forces introduced by the rolls into the grinding bed to change and thus the quality of the in-bed attrition also changes. Due to the short-term increase in the contact force of the rollers is achieved that they have a sufficient rotation or a sufficient angular momentum. For the purposes of the invention, too little rotation of the rollers is understood when the peripheral speed of the roller is less than 50% of the speed of the material flow under the roller.
  • the roller bearings are designed with a larger game than conventionally. On the one hand, this reduces the starting torque and, on the other hand, also reduces the risk of stoppage or of the grinding rollers having too low a rotational speed.
  • the roller mill is operated in an overflow and / or air flow mode. In the mode of operation as a pure overflow mill, the prepared ground material is conveyed, inter alia, by the rotation of the grinding bowl over a possibly existing storage area and falls into an area below the grinding bowl. Here it can be transported away.
  • the grinding material falling over the grinding plate is picked up by means of a process air flow and, in particular, blown away upwards.
  • a process air flow Above the grinding bowl is usually a sifter to which the prepared ground material is transported by means of the process air stream.
  • a sighting takes place, so that sufficiently finely prepared ground material is withdrawn from the preparation process, whereas further to be processed ground material is fed back to the reprocessing process as a so-called reject.
  • in-bed attrition is also referred to as a milling process in the context of the invention, as it may be considered as being distantly related to standard milling processes, but differs therefrom by another shredding technique.
  • the in-bed attrition is carried out by means of a roller mill, so that the terminology for mills is used for ease of understanding, although in the true sense, grinding no longer takes place.
  • the process air stream that passes around the grinding bowl does not absorb all the overflowing regrind, but only a portion thereof. Another part falls down and is transported by means of subsidy from below the grinding bowl.
  • the material to be processed and separated from the connected multi-component system concrete fracture is concrete fracture itself consists mostly of gravel, sand and cement.
  • gravel and sand are separated from one another and from the cement stone by means of the in-bed attrition and cleaned. Due to the in-bed attrition, the cement stone in particular is rubbed off by the gravel and sand, so that, according to the method according to the invention, gravel and sand are again essentially in pure form and can thus be used again for the production of concrete.
  • a vertical roller mill with separator which can also be integrated, is used. additionally a process air stream is adjusted so that from the overflowing millbase a component, such as cement paste, and at least partially compounds of the first and the second component, such as cement stone and sand, are transported by means of the process air flow to the classifier, while the first purified component, such as gravel and sand, are removed as coarse material from the grinding process.
  • a component such as cement paste
  • the first and the second component such as cement stone and sand
  • the shredded second component such as comminuted cement stone
  • the first and the second component such as cement stones and Compounds made of cement stones and sand
  • sand can be separated from the coarse material withdrawn by sieving, so as to enable further separation in multi-component systems comprising more than two components.
  • a vertical roller mill is operated in the combined overflow and air flow mode.
  • the process air stream which sweeps from below around the grinding bowl, adjusted so that it only light or small materials, especially crushed cement stone and adhesions of cement stone and sand, transported upwards towards the sifter.
  • Cleaned heavy components such as sand and gravel can fall down against the process stream and be removed as coarse material from the grinding process.
  • fused material which is also called intergrown, can be discharged from the components such as gravel, sand and cement stone as coarse material from the grinding process. This insufficiently processed material can be detected by sorting processes and fed back to the in-bed attrition method according to the invention.
  • a subsequent separation by sieving is suitable.
  • the material brought to the classifier with the process air stream is sighted there.
  • only crushed cement paste is discharged as fine material, whereas the remaining material is fed back to the grinding bowl.
  • the comminution of the cement stone takes place accordingly the process of the invention essentially not by a compressive stress but by the in-bed attrition instead.
  • the cement is crushed by the other particles as well as other cement stones.
  • the inventive method may preferably with a roller mill with a rotatable grinding bowl, on the operation of a grinding bed is made of ground material and with at least two stationary, rotatable grinding rollers, which roll on the ground during operation run.
  • a sifter is preferably arranged above the grinding rollers and additionally provided a device for defining and maintaining a minimum grinding gap between the grinding bowl and the grinding rollers.
  • the vertical roller mill according to the invention is based on the finding that in the case of in-bed attrition a significantly lower compression of the ground material on the grinding bed is necessary, or may occur, than with a conventional grinding bed, which is present, for example, during coal grinding. Due to this low compression or force through the grinding rollers, however, there is a problem in connection with locally different hardnesses and other properties of the grinding bed, which can be significantly different pronounced. For example, in some places due to the low compression and relatively high height of the grinding bed more air bubbles may be present than at others. Now, if the grinding rollers operated with a constant contact pressure, so there is a risk that at the points where more air bubbles are present, the grinding rollers squeeze the grinding bed much stronger than at others.
  • corresponding stops or stop buffers may be provided for the grinding rollers.
  • Another possibility is to design the hydraulic system of the grinding rollers accordingly.
  • a hydraulic system for adjusting the contact force of the grinding rollers during operation, which counteracts the weight of the grinding rollers to a surface pressure in the range of 15 kN / m 2 to 140 kN / m 2 based on the vertically projected area of the mean roller diameter to enable.
  • the hydraulic system is designed in vertical roller mills, in particular the LOESCHE type, such that the pressing force of the grinding rollers acts in the same direction as the weight force.
  • LOESCHE type such that the pressing force of the grinding rollers acts in the same direction as the weight force.
  • a surface pressure of 600 kN / m 2 up to 1000 kN / m 2 or more should be achieved by means of the hydraulic system. In the case of in-bed attrition, however, this is not desired.
  • a monitoring system is provided on each grinding roller, which monitors the rotation of the grinding rollers during operation. wakes. This is necessary when using a vertical roller mill for in-bed Attrition, since, as already stated, with very low contact pressure is used, so that it may happen that the grinding rollers no longer rotate sufficiently.
  • this state can be detected and appropriate countermeasures can be triggered, for example, the temporary increase of the contact force can be performed.
  • FIG. 1 shows a flow chart of a concrete preparation according to the invention
  • FIG. 3 shows a detail of the vertical roller mill from FIG. 2.
  • FIG. 1 a flow diagram 10 for concrete fracture treatment is shown as an example of the method according to the invention for processing and separating a material from a connected multicomponent system.
  • the method for treating concrete fracture described in more detail below can also be used in the same or similar manner for other material systems in which the individual components have no ductile properties.
  • the following embodiment is merely exemplary in order to clarify the exact embodiment of the method according to the invention and its advantages by way of examples.
  • the individual method steps, which are described in a coherent manner in this example can also be carried out individually and are thus to be considered separately as part of the invention.
  • concrete granules having a size of, for example, up to 80 mm grit size are used as starting material or feed product 1 1.
  • This concrete granulate which is also referred to as concrete fracture, is given to a roller mill 12 according to the invention as a feedstock.
  • the roller mill 12 is operated in the method of FIG. 1 in combined overflow and airflow modes and is also referred to as a vertical roller mill. The processes occurring in the roller mill 12 and the operation of the roller mill 12 will be discussed in more detail later with reference to FIG. 2.
  • the roller mill 12 is operated according to the invention as an in-bed Attritionsaggregat and not as a crushing unit.
  • processed and crushed cement stone 16 are withdrawn from the treatment cycle.
  • coarse material 13 which consists essentially of processed gravel, sand and still fused material, the proportion of which is significantly lower than the feed material 1 1.
  • the intergrown material may be, in particular, gravel and / or sand with the adhesion of cement stone.
  • the coarse material 13 is subjected to a screening 14, with which the sand 17 can be removed as a fraction of 0 mm to 2 mm. This sand 17 is so well cleaned by the inventive method 10 that it can be used similar to primary sand in concrete production.
  • the coarse material 13 which has a size of over 2 mm, is then subjected to a density sorting 15. This serves to be able to discharge cleaned gravel 18, which has a higher density, out of the processing circuit. Material which does not have a sufficiently high density - this is in particular Gravel and / or sand, on which cementum stone adhesions are still present, are again supplied to the in-bed attrition in the roller mill 12.
  • the procedure is conceivable, but not shown here, that the sand is also fed to a density sorting, in order to possibly also remove there any remaining adhesions to cement paste or other impurities and to feed it again to the rolling mill process.
  • the density sorting can be done as a dry density sorting for example by means of wind sifters, air mesh machines and / or air fluidized bed sorting. Alternatively, a wet density sorting can be performed. In this case, however, then the rolling mill 12 again supplied materials must be dried again.
  • a wet sorting method for example, floating-sink divorce, both static and dynamic, setting sorting, Wendelscheider- or herdsorttechnik and Wirbel harshsortier processor possible.
  • roller mill 12 and its operation for in-bed attrition will now be explained in more detail below with reference to the more detailed FIG. 2.
  • FIG. 2 shows a schematic sectional view through a vertical roller mill 30 of the LOESCHE type.
  • An essential component of the roller mill 30 are truncated cone-shaped grinding rollers 31, which roll on a grinding bed 41.
  • truncated cone-shaped grinding rollers 31 which roll on a grinding bed 41.
  • vertical rolling mills 30 having three, four, six or more grinding rolls may also be used.
  • the grinding bed 41 is formed on a grinding bowl 32.
  • the grinding rollers 31 themselves, which may alternatively be referred to as rollers, are provided fixed, but rotatable about the drawn axis.
  • the grinding bowl 32 in turn is rotatable about its central axis as indicated. If now the grinding Turned bowl 32, so the grinding material 42 present on the grinding bed also rotates. As a result, the grinding rollers 31 are rotated by friction between the ground material 42 and the outer contour of the grinding rollers 31 in rotation.
  • a separator 34 which can be designed both dynamically and statically, is provided.
  • the in-bed attrition process according to the invention will now be discussed in more detail.
  • the feedstock or ground material 42 for example concrete fracture, is fed to the preparation process via a material feed 35.
  • the material task 35 is designed such that the feedstock 42 is abandoned in the central region of the grinding bowl 32.
  • the material to be ground is accelerated on the one hand and, on the other hand, transported spirally outwards, so that it is rolled over by the grinding rolls 31.
  • the grinding rollers 31 are operated in a different manner than normally known in Wälzmühlen 30. They are essentially not used here for pressure reduction of the ground material.
  • only a very small surface pressure is applied to the grinding bed 41 by the grinding rollers 31. This is in the range of 15 kN / m 2 to a maximum of 140 kN / m 2 . It is preferably in the range between 30 kN / m 2 and 80 kN / m 2 .
  • This surface pressure essentially serves to introduce sufficiently large shear forces into the grinding bed 41, so that the particles present therebetween attritieren each other.
  • a not shown in Fig. 2 inverse hydraulic system is provided, which serves to counteract the weight of the rollers 31.
  • This hydraulic system can act as a negative force on a rocker arm 33 of the grinding rollers 31.
  • the inverse hydraulic system pushes on the pivot lever 33, that the roller 31 is slightly raised or acting on the roller a force against its weight.
  • the material located on the grinding bowl 32 which is already partially processed, displaced and runs over a storage edge 36 in a gap between Grinding bowl 32 and mill housing over.
  • the amount of the supplied process air 37 is essential for the first sighting.
  • the sighting can also be influenced by a blade ring 38.
  • the process air 37 is set in combination with the blade ring 38 such that substantially overflowing coarse material 51 gravel and sand from the processing cycle can be deducted. This is then screened as described in relation to FIG.
  • the injected process air 37 carries in particular crushed cement stone as well as particles of sand with adhesive cement stone to prepare for shipment. There takes place a second sighting. Again, this is a density sorting.
  • the classifier 34 in particular, sufficiently comminuted cement stone is removed from the processing cycle. This crushed cement stone is removed from the processing cycle with the outflowing process air at the process air outlet.
  • Not sufficiently crushed cement stone or fused cement stone and sand material is passed through a semolina cone 40 back to the grinding bowl 32 and there fed to a further in-bed Attrition.
  • roller speed meter 46 are provided which determine the rotational speed of the rollers 31 during operation. This is necessary because it may happen that the rollers rotate too slowly due to the low contact pressure at which the rollers 31 are pressed onto the grinding bed during in-bed attrition. If this is detected by means of the roller speed meter 46, the contact force can be temporarily increased so as to increase the rotation of the rollers.
  • Essential for the method according to the invention and the successful in-bed attrition is to make the grinding bed sufficiently high so that sufficient particles of the feed material are present, so that a mutual attrition is made possible. Possible influencing variables for the grinding bed are explained in more detail below in FIG. 3.
  • FIG. 3 shows a detail of the roller mill 30 from FIG. 2.
  • the same reference numerals as in FIG. 2 are used here.
  • the feed mass flow rh m in, the contact pressure F w of the grinding rollers 31, the grinding bowl speed n s , the height h of the storage rim 36, and the internal circulating flow are available for influencing the grinding bed height s.
  • the internal circulation flow is not shown here in FIG. 3. When it is essentially rejected by separator material which riv a part of the object of the mass flow in mind.
  • the Mahlbett shoulders s can be varied by a variation of the contact pressure F w of the rollers 31, which influences the surface pressure.
  • the surface pressure is the force acting directly below the rollers on the grinding bed. If the contact pressure F w of the rollers is increased, then the millbase is more compacted or comminuted, so that the Mahlbett Americans s decreases. Conversely, the Mahlbettiere Americans s increases when the rollers 31 are pressed with a lower contact force F w on the grinding bed 41.
  • the influencing of the feed mass flow rh m , i n can be done in two ways.
  • the roller mill 30 can be given more feed material per unit of time; on the other hand, the separator can be set differently, so that a higher reject, ie a higher rejection on the separator, is present, so that more material is fed back to the grinding bowl 32 becomes.
  • the reject can also be increased by increasing the process air flow, as in this case less regrind down than coarse material is withdrawn from the processing cycle, but instead is transported as a potential fines to the classifier.
  • the feed mass flow ri in as well as the internal circulation flow significantly influence the discharge mass flow rh m 0 ut- If the internal circulation flow increases, it is said that the circulating load is increased.
  • the storage area 36 Another possibility to influence the Mahlbettiere too s, is the storage area 36. If its height h increased so accumulates more material on the grinding table. This means that in principle more material has to be present on the grinding bowl 32 so that it can flow from the grinding bowl 32 with the discharge mass flow rh m 0 .
  • the example in particular in Figures 1 and 2, based on the treatment of concrete fracture.
  • the method according to the invention can also be used for the preparation and separation of many different connected multi-substance systems.
  • the in-bed attrition in the roller mill which in other words allows only a frictional stress of the material to be processed and not actual comminution
  • natural shale which from slate and impurities such as lime, ores or other organic components exists to be used. It is essential to ensure that the natural shale to produce slate flour, in which, despite its fineness, the individual particles continue to have a plate-like shape.
  • the method is suitable for processing mica, which consists of phyllosilicates and possible impurities.
  • mica which consists of phyllosilicates and possible impurities.
  • impurities mainly pure deposits are exploited until now.
  • this is only the case since no suitable treatment methods for dry attrition and separation have been known hitherto.
  • the process according to the invention can be used in the treatment of kaolin-containing industrial sands, which consist of kaolin, feldspar and quartz sand.
  • kaolin-containing industrial sands which consist of kaolin, feldspar and quartz sand.
  • graphite ore which consists of graphite and ore matrices, and of clay or bentonite, contaminated by sand or non-layered silicates, as well as the digestion by attrition of heavy mineral sands for separating cohesive constituents and subsequent density separation of rutile, zirconium, llmenit , etc. of an unsatisfied sandy fraction with the method according to the invention possible.
  • Even FeCr slags consisting of disintegrating slag, corresponding metal and possibly stabilized slags can be treated.
  • the metal component is a non-ductile component, since otherwise attrition according to the method according to the invention is not possible, since otherwise no frictional stress in the sense of the invention

Abstract

L'invention concerne un procédé de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées. Pour cela, le matériau est introduit en tant que charge de départ dans un broyeur à rouleaux. Dans le broyeur à rouleaux, on effectue un broyage en lit au moyen de rouleaux de broyage dans un lit de broyage en faisant subir au matériau des efforts de cisaillement et des frottements mutuels. On fait fonctionner le broyeur à rouleaux de telle façon que le lit de broyage présente une hauteur minimale supérieure au diamètre d'une particule de l'un des deux composants et on choisit la force d'appui des rouleaux de façon à obtenir une pression par unité de surface allant de 50 kN/m² à 140 kN/m² rapportée à la projection verticale de la surface du diamètre de rouleau moyen. L'invention concerne en outre un broyeur à rouleaux verticaux perfectionné pour la mise en œuvre du procédé selon l'invention.
PCT/EP2014/055685 2014-03-21 2014-03-21 Procédé et dispositif de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées WO2015051925A1 (fr)

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EP14712271.7A EP2903744B1 (fr) 2014-03-21 2014-03-21 Procédé et dispositif de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées
RU2015118815A RU2648705C2 (ru) 2014-03-21 2014-03-21 Способ и устройство для обработки и выделения материала из комбинированной многокомпонентной системы
PCT/EP2014/055685 WO2015051925A1 (fr) 2014-03-21 2014-03-21 Procédé et dispositif de traitement et de séparation d'un matériau à partir d'un système contenant plusieurs substances liées
BR112015011596-9A BR112015011596B1 (pt) 2014-03-21 2014-03-21 método e dispositivo para o preparo e a separação de um material contendo um sistema compósito de múltiplas substâncias e moinho vertical de rolos
SG11201503809VA SG11201503809VA (en) 2014-03-21 2014-03-21 Method and device for preparing and separating a material comprising a composite multi-substance system
KR1020157013337A KR101908906B1 (ko) 2014-03-21 2014-03-21 혼합 멀티성분 시스템을 포함하는 재료를 준비하고 분리하기 위한 방법과 장치
CN201480003146.XA CN105102132B (zh) 2014-03-21 2014-03-21 用于制备和分离包括复合多物质系统的物料的方法和装置
JP2017500131A JP6522731B2 (ja) 2014-03-21 2014-03-21 多物質系の複合材を含む材料を前処理および分離するための方法およびデバイス
TW104108709A TWI680802B (zh) 2014-03-21 2015-03-19 預備及分離一包含合成的多物質系統的材料之方法與設備
ARP150100855A AR099817A1 (es) 2014-03-21 2015-03-20 Procedimiento y dispositivo para preparar y separar un material que comprende un sistema de múltiples sustancias compuesto
IL238733A IL238733A0 (en) 2014-03-21 2015-05-10 Method and device and preparation and separation of material consisting of a multi-material system
HK15108702.5A HK1208002A1 (zh) 2014-03-21 2015-09-08 用於從組合的多組分系統中製備和分離材料的方法和設備

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AR (1) AR099817A1 (fr)
BR (1) BR112015011596B1 (fr)
HK (1) HK1208002A1 (fr)
IL (1) IL238733A0 (fr)
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BE1029729B1 (de) * 2021-09-03 2023-04-03 Thyssenkrupp Ind Solutions Ag Vorrichtung und Verfahren zur Aufbereitung von Altbeton
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CN105102132B (zh) 2019-06-07
JP2017513709A (ja) 2017-06-01
AR099817A1 (es) 2016-08-17
KR20150112927A (ko) 2015-10-07
TW201540365A (zh) 2015-11-01
EP2903744B1 (fr) 2017-02-22
KR101908906B1 (ko) 2018-10-17
BR112015011596A2 (pt) 2017-07-11
RU2015118815A (ru) 2017-03-07
CN105102132A (zh) 2015-11-25
HK1208002A1 (zh) 2016-02-19
TWI680802B (zh) 2020-01-01
RU2648705C2 (ru) 2018-03-28
IL238733A0 (en) 2015-06-30
JP6522731B2 (ja) 2019-05-29
EP2903744A1 (fr) 2015-08-12
SG11201503809VA (en) 2015-06-29

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