EP3996849A1 - Vertikal-rollenmühle - Google Patents
Vertikal-rollenmühleInfo
- Publication number
- EP3996849A1 EP3996849A1 EP20735283.2A EP20735283A EP3996849A1 EP 3996849 A1 EP3996849 A1 EP 3996849A1 EP 20735283 A EP20735283 A EP 20735283A EP 3996849 A1 EP3996849 A1 EP 3996849A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- grinding
- support arm
- compression
- vertical roller
- 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.)
- Pending
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
- 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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Definitions
- the invention relates to a vertical roller mill according to the preamble of independent patent claim 1.
- the ground material is stressed and crushed in the grinding gap between the (grinding) roller and the (grinding) plate.
- the regrind is made up of the feed material and the partly much finer circulating material (classifier size and external circulation).
- the grinding stock is fed to the grinding gap at high speed by rotating the grinding table and then comminuted in the grinding gap.
- the condition of the grinding bed has a decisive influence on the grinding process between the roller and the grinding track.
- Time-varying material accumulations in front of the roll (bow waves) have a negative effect on the introduction of the grinding force and the pressure load.
- a vertical roller mill with the features of the preamble of claim 1 is known.
- an installation (scaper 13) is provided in front of the grinding gap, which is formed between the roller and the plate, in the transport direction of the ground material.
- the installation has the function of compressing and venting the ground material and of achieving a uniform grinding bed height.
- the installation according to EP 3 238 824 A1 is a passive arrangement by means of which a pressing force, which is set once via a weight, can be exerted on the material to be ground.
- the installation has a support arm (support beam 14) on which a compression element (scaper body 15) is arranged via movable support elements (20).
- a weight (weight 21) is used to press the compression element onto the grist with a predetermined force.
- the compression element exerts a constant passive force on the grist, which leads to a compression and ventilation of the grist.
- This force cannot be adapted to changing properties and / or compositions of the grist during operation of the mill.
- the disadvantage of the known vertical roller mill is therefore that the effect of the installation cannot be flexibly adapted to changing operating conditions of the mill and, in particular, changing conditions in relation to the grinding stock, because in the known device the contact pressure of the compression element is determined by the weight initially set once and cannot be adjusted quickly and as required if the composition of the ground material changes during operation of the mill.
- the material properties e.g. particle size composition, (7) of the grist on the grinding table and the grinding track change constantly.
- the most uniform and optimized mill operation possible should be guaranteed.
- the object of the invention is to provide a vertical roller mill in which, in spite of the changing properties of the material to be ground, the most constant possible operation of the mill is guaranteed with a uniform and well-prepared grinding bed for grinding in the grinding gap.
- the object of the invention is also to specify a method for the optimized operation of a vertical roller mill.
- the object is achieved by a method for operating a vertical roller mill with the features of claim 15.
- the vertical roller mill has at least one measuring device for measuring forces acting on the installation, a control and regulating device for evaluating measuring signals from the measuring device and for Generation of an actuating signal for the active adjustment of the distance of the compression element from the surface of the plate facing the roller (hereinafter also referred to as "grinding path") as a function of the measurement signals of the measuring device and an adjusting device by means of which the distance of the compression element from the surface facing the roller Surface of the plate can be adjusted as a function of the actuating signal of the control and regulating device.
- the measurement of the forces actually acting on the paving provides information in real time about changing material properties of the ground material such as changes in the particle size composition, the maximum particle size, the proportion of particularly fine particles, the particle shape, the bulk density, the material moisture, the composition of the feed mixture and the proportion of circulating material in the fed regrind.
- a change in the measuring signals of the measuring device can be used to deduce how the compression element of the built-in must be regulated in order to react to the changed material properties of the ground material in such a way that mill operation that is optimized with regard to certain operating parameters is achieved.
- the distance of the compression element in front of the surface of the plate facing the roller is a decisive influencing variable for an energy saving that can be achieved when operating the mill.
- the active height adjustment of the compression element relative to the plate or the grinding path provided according to the invention, makes it possible to react to changed process conditions (circulation, particle size, material moisture, wear ).
- the forces and loads acting on the installation can be measured using strain gauges, force measuring devices and piezo force transducers. If necessary, these measuring devices or sensors can be cooled by a fluid. For example, they can be installed in a protected interior space. Attachment to the outside of the mill housing is also conceivable.
- the measurement signals from the measurement device are fed to a control and regulating device which evaluates the measurement signals and provides an actuating signal for actively adjusting the distance between the compression element and the Roller facing surface of the plate (ie the grinding track) generated depending on the measurement signals of the measuring device.
- the distance between the compression element and the grinding path is reduced via the actuating signal and, at the same time, it is ensured that the forces acting on the installation do not exceed a predetermined load limit value.
- the power consumption of the grinding system to evaluate the energy consumption and the grinding bed height to evaluate the comminution, a model-based setpoint is generated and the control signal is actively adjusted.
- the actuating signal generated by the control and regulating device is fed to an actuating device.
- the adjusting device adjusts the distance between the compression element and the surface of the plate facing the roller (that is to say the grinding path) as a function of the adjusting signal from the control and regulating device.
- the adjusting device can be designed differently, depending on how the installation or the compression element is designed and which adjusting movement is to be carried out in order to change the distance between the compression element and the grinding track. For example, translational movements or rotary movements can be used to carry out the desired positioning movement of the compression element. Different embodiments according to the invention of the installation and of the compression element are described below, for which appropriately adapted actuating devices are then also provided.
- the distance of the compression element from the surface of the plate facing the roller i.e. the grinding path
- an operating parameter relevant to the operation of the mill assumes an optimized value.
- the measurement according to the invention of the forces and loads acting on the installation is a prerequisite for actively adapting the distance between installation and grinding path. It can be assumed that the deeper the compression element protrudes into the grinding stock fed to the grinding gap, the higher the forces and loads that occur. At the same time there will be a Set greater material compression or material ventilation, which enables more efficient grinding with lower energy consumption and possibly higher throughputs (ie higher production volumes).
- the machine loads (vibrations, accelerations, expansions, torques) occurring in the mill are usually recorded. These measured machine loads on the mill can be used in connection with the height adjustment of the installation or the compression element for the new control concept of the mill according to the invention.
- the installation according to the invention enables a new control concept or an extension of existing control concepts for vertical roller mills, whereby the grinding bed is actively prepared and the grinding process is improved in terms of throughput, energy and water consumption.
- the force measurement at the installation can be used to reduce the distance between the compression element and the grinding path until a significant reduction in the power consumption of the mill drive has been achieved.
- the specific energy consumption i.e. the drive power based on the product quantity
- the forces acting on the installation increase and the machine loads (e.g. vibrations) increase.
- the control concept according to the invention now has the task of stabilizing these loads below defined limit values and at the same time minimizing energy consumption.
- control concept should also be geared towards minimizing the amount of process water (ie the amount of process water sprayed onto the grist) or maximizing the amount produced by the mill.
- the installation has a support arm arranged in front of the grinding gap in the transport direction of the grinding bed, the support arm carrying the compression element.
- the compression element can be arranged to be movable relative to the support arm, or the compression element can be rigidly connected to the support arm.
- the adjustment device can be designed in such a way that it effects an adjustment movement of the compression element relative to the support arm, i.e. the support arm can be designed to be stationary (e.g. firmly connected to the mill housing) and only the compression element performs the adjustment movement in order to change its distance from the grinding path.
- the adjusting device can be designed in such a way that the entire support arm together with the compression element is adjusted relative to the grinding path, so that the distance between the compression element is thereby adjusted changed by the grinding track.
- the actuating devices can be arranged outside the mill housing so that they are not affected by the rough operating conditions in the interior of the mill.
- the support arm has a hollow interior, sensors of the measuring device for measuring forces acting on the installation being arranged in the hollow interior.
- the sensors are protected against influences from the interior of the mill (e.g. dust, mechanical stress from the ground material, process water, etc.), which significantly reduces the risk of functional failures or measurement inaccuracies of the sensors.
- the sensors for the measuring device can be designed, for example, as strain gauges, force measuring devices or piezo force transducers.
- connection and signal cables from can be brought up to the sensors outside the mill housing.
- the cables required for transmitting the measured values can be led simply and wear-resistant from the sensors to the outside to a control and regulating device arranged outside the mill housing.
- sensors for metal detection can be arranged in the hollow interior of the support arm, with which metallic foreign bodies in the ground material such as nuts, screws, excavator teeth can be detected. If such foreign bodies are detected in good time, the grinding system can be shut down in a targeted manner and thus protected from damage. This contributes to an increase in the system availability and to a reduction in downtimes of the grinding system.
- sensors can be arranged in the hollow interior of the support arm, with which the wear state of the roller or damage to the roller surface can be detected. Such sensors can, for example, be designed as ultrasonic sensors with which the surface of the roller to which the support arm is assigned is scanned.
- the water injection nozzles with which the process water is sprayed onto the grinding stock in front of the grinding gap can also be arranged in the hollow interior of the support arm.
- the supply lines for the process water to the nozzles can then also be laid in the hollow interior of the support arm.
- the water jet has to be guided through the wall of the hollow support arm, e.g. by inserting the spray nozzles into openings or holes in the support arm wall (e.g. screwing them in). In this way, the water pipes and the nozzles for the process water are arranged protected from influences from the interior of the mill.
- the compression element is designed as a compression plate which is arranged to be movable relative to the support arm, the actuating device being designed as a drive by means of which the position of the compression plate can be adjusted relative to the support arm.
- Another element that can be arranged in a protected manner in the hollow interior of the support arm is an adjustment gear with which the compression element can be moved relative to the support arm to perform the active adjustment movement according to the invention.
- a drive shaft for example, can extend through the hollow interior of the support arm, to which pinions are attached which cooperate with toothings which in turn are attached to the compression element.
- the drive motor for driving the adjusting gear can be arranged outside of the support arm and also outside of the mill interior.
- the drive motor can be arranged on the outside of the housing wall of the mill.
- the actuating device has a drive unit with which the support arm can be moved relative to the plate in such a way that the distance between a central axis of the support arm and the surface of the plate facing the roller (i.e. the grinding path) changes.
- the compression element can be designed as a compression plate which is rigidly connected to the support arm. A particularly robust rigid connection between the support arm and the compression plate is obtained if the compression plate is welded to the support arm. The change in the distance between the compression element and the grinding path then takes place in that the distance between the support arm and the compression element are changed.
- the drive unit can be arranged on the outside of the housing wall of the mill.
- the drive unit can, for example, have a mechanical spindle drive with which the support arm is adjusted relative to the housing wall and the plate of the mill.
- a hydraulic system can also be provided for adjusting the support arm.
- the support arm is designed as a rotatably mounted shaft and the compression element as a compression tube, the shaft being arranged eccentrically in the compression tube and connected to it in a rotationally fixed manner, the distance between an outer jacket surface of the compression tube being reduced by rotating the shaft by means of the adjusting device from the one facing the role Surface of the plate (i.e. the grinding track) is adjustable. Due to the eccentric arrangement of the shaft in the compression pipe, i.e. the distance between the center axis of the shaft from the center axis of the compression pipe, a rotation of the shaft leads to a change in the distance between the outer surface of the compression pipe and the surface of the roller facing the Grinding track arranged on a plate.
- the movement of the compression element causing the adjustment is a rotary movement, namely the rotation of the shaft on which the compression pipe is eccentrically mounted.
- a rotary drive transmitting the rotational movement to the shaft can be arranged on the outside of the housing wall of the mill.
- the compression element is designed as a one-piece compression plate.
- the compression plate extends in one plane, this plane enclosing an angle of less than 90 ° with a reference plane which is perpendicular to the surface of the plate and in which a central longitudinal axis of the support arm extends. This angle can be used to influence which portion of the ground material transported to the side is transported away.
- the compression plate can also be arranged tilted at a further angle towards the support arm or away from the support arm.
- the compression element is designed as a compression plate, the compression plate being divided into at least two parts in its direction of extension transversely to the grinding bed, the mutually adjacent parts of the connecting plate extending in different planes, the planes at an angle of less than 180 ° lock in.
- the tip of the angle points away from the roll, i.e. against the direction of transport of the grist.
- the individual parts of the compression plate have different lengths in their direction of extension transversely to the grinding bed.
- the material flow of the grinding stock in the direction of the grinding gap is influenced.
- the grist is pre-compressed and vented by the compression plate.
- the ground material can for example be specifically retained and pre-compressed to a greater extent, or a larger proportion of the ground material can, on the other hand, preferably be directed radially outward towards the nozzle ring, especially when large material flows are to be processed, so that this partial flow becomes the so-called external regrind circulation (short: external circulation) is fed.
- external regrind circulation short: external circulation
- the angle of incidence of the compression plate or the compression plate parts can be designed and optimized depending on the material to be ground (e.g. cement, slag sand, raw material, ).
- the shape of the compression plate can be adapted to the grinding gap or the grinding path contour.
- the angle which the planes in which the parts of the compression plate extend enclose with one another is between 90 ° and 180 °, the planes also being tilted by an angle towards or away from the support arm.
- the choice of this tilt angle can also be used to specifically influence the flow of material to be ground or the design of the grinding bed, in that the material to be ground is dammed less or more strongly by the tilted compression plate.
- an injection device is provided with which a liquid such as water (also referred to as “process water”) is sprayed onto the grinding bed in an area between the installation and the grinding gap or, viewed in the direction of transport of the ground material, in an area before installation can be sprayed onto the grist.
- a liquid such as water (also referred to as “process water”)
- process water also referred to as “process water”
- the inventive design of the installation results in new possibilities for arranging the water injection or for complete integration the water injection into the installation. Because the grinding bed is pre-compressed and has a more uniform fleas across the width of the grinding path, the more targeted introduction of water can reduce both the amount of water and the vibration level of the grinding system.
- sensors are provided with which the rollers are monitored with regard to the state of wear and damage such as material breakouts or with which undesired foreign objects in the grinding stock can be detected before they get into the grinding gap. If a foreign body is detected, the grinding system can be shut down in a targeted manner and protected from damage. In this way, downtimes of the mill can be reduced and the service life of the mill can be extended.
- a long service life of the installation can be achieved both through structural measures and through a suitable choice of material or armoring of the compression element and possibly also of the support arm.
- FIG. 1 shows an embodiment of the invention in a side view from a viewing point inside the mill housing, with a compression element designed as a compression plate, the compression plate being movable relative to the support arm;
- FIG. 2 shows a plan view of an embodiment which is slightly modified compared to the embodiment according to FIG. 1, the plan view also showing the components arranged outside the mill housing;
- FIG. 3 shows a different embodiment of the invention compared to FIGS. 1 and 2; 4 shows an embodiment of the invention that is different from FIGS. 1 and 2 as well as from FIG. 3;
- FIG. 8 shows a fourth embodiment of the compression plate.
- FIG. 1 shows the part according to the invention of a vertical roller mill, otherwise not shown further for reasons of clarity. Only a single grinding roller 3 is shown, which forms a grinding gap 4 with a surface 8 of the plate 1. Several, for example three or four, rollers 3 can be arranged around the circumference of the grinding table 1. Grist 2 is applied to the plate 1 from the outside via a feeding device (not shown). The rotation of the plate transports the material to be ground 2 in the direction of the grinding gap 4.
- An installation 6 is arranged in front of the grinding gap 4 in the transport direction of the ground material 2.
- the installation 6 has a support arm 12 which, in the exemplary embodiment shown, has a rectangular cross section and has a hollow interior 13.
- the support arm 12 carries a compression element 7, which is designed as a compression plate 7a.
- the compression plate 7a is formed in one piece, ie it consists, for example, of a one-piece sheet metal element.
- the compression plate 7a could also consist of several parts (eg several individual sheet metal elements) in its direction of extension transversely to the grinding gap 4.
- the compression element 7 or the compression plate 7a is arranged so as to be movable relative to the support arm 12. This is indicated by the double arrow 30.
- the double arrow 30 indicates that the compression plate 7a can be moved in the direction of the double arrow on the plate 1 towards or away from the divider. As a result, the distance between the lower edge of the compression plate 7a and the surface 8 of the plate 1 facing the roller 3 is changed.
- a is located in the interior 13 of the hollow support arm 12
- Adjusting gear arranged, which comprises a driven adjusting element such as a shaft on which, for example, drive pinions are arranged, which for example interact with a toothing of the compression plate 7a and cause an adjustment of the compression plate 7a.
- the grinding stock 2 is transported against the compression plate 7a by the rotation of the plate 1.
- the compression plate 7a exerts a compression force on the ground material 2, as a result of which the ground material is compressed and vented.
- a grinding bed 5 with an almost uniform grinding bed height is thereby produced.
- the grinding bed 5 is transported further in the direction of the grinding gap 4 by the rotation of the plate 1.
- the ground material 2 is comminuted and ground.
- the degree of compression of the grinding bed 4 before it is drawn into the grinding gap 4 and the height of the grinding bed 4 in front of the grinding gap 4 have a direct influence on the energy consumption of the mill. In the context of the invention, opposing effects were found.
- the sensors 14, designed as strain gauges, force measuring devices or piezo force transducers, for example, are arranged in the interior 13 of the hollow support arm 14 and thus protected from the rough influences from the mill interior during operation (e.g. from dust, splash water, stone chips, etc.).
- the necessary cables and lines for the power supply and the signal transmission can also be laid protected through the interior 13.
- injection nozzles 31 are also arranged in the interior 13 of the support arm 12, via which process water can be sprayed onto the ground material 2.
- the nozzles 31 are aligned with the area between the installation 6 and the grinding gap 4.
- the injection nozzles 31 can alternatively also be positioned at other locations, e.g. on the underside of the support arm 12 facing the grist 2 or on the compression plate 7a.
- the alternative positions for the injection nozzles are shown in FIG. 1
- a sensor 32 for metal detection is also arranged, with which metallic foreign bodies in the ground material 2 can be detected.
- this sensor 32 for example, screws, nuts, broken excavator teeth or other metallic foreign bodies in the grinding stock 2 can be detected before they get into the grinding gap 4 and there can lead to damage to the grinding roller 3.
- Another sensor 26 which is arranged in a protected manner in the interior 13 of the support arm 12, is designed as an ultrasonic sensor for scanning the surface of the roller 3. With this sensor 26, the state of wear of the roller 3 can thus be determined and damage such as, for example, breakouts from the roller surface can be determined.
- FIG. 2 shows a plan view of an embodiment which is slightly modified compared to the embodiment shown in FIG. 1.
- a sensor 14 for measuring the forces acting on the installation 6 is located in the interior 13 of the support arm 12 arranged.
- FIG. 2 also shows further, alternative positions for the arrangement of the force sensors. Two alternative positions, in which the force measuring sensors of the measuring device 9 can be arranged, are identified by the reference symbols 14 ′ and 14 ′′.
- the positions 14 ′ and 14 ′′ shown in FIG. 2 lie outside the mill housing 21 and are therefore withdrawn from the rough influences of the grinding process inside the mill housing 21.
- the motor 33 for adjusting the compression plate 7a relative to the support arm 12 is arranged on the outside of the housing 21 of the mill.
- the motor 33 drives a gear, not shown in detail, which transmits an adjustment movement to the compression plate 7a.
- the motor 33 is controlled or regulated by an actuating signal which it receives from a control and regulating device 10 which is also arranged outside the housing 21 of the mill.
- the sensors 14 (or 14 ‘, 14 ′′) are connected to the control and regulating device 10 via lines. The measured values for the forces acting on the installation 6 are transferred from the sensors 14 (or 14, 14 ′′) to the control and regulating device 10 via the lines.
- control and regulating device 10 can also receive measurement signals from other sensors provided inside or outside the housing 21, for example from sensors which measure the machine load (e.g. the vibrations) in the grinding plant (not shown). At the same time, the control and regulating device 10 can also be sent the power consumption of the mill drive. With this information, the control of the vertical roller mill already described above can be implemented with the aim of minimizing energy consumption with machine loads remaining below a predetermined limit value.
- three sensors 26 spaced from each other in the longitudinal direction of the support arm are arranged within the interior 13 of the support arm 12, which are designed as ultrasonic sensors and which serve to determine the wear condition of the roller 3 and damage to the roller such as breakouts to be detected in the area of the grinding surface of the roller 3.
- Fig. 3 shows a compared to FIGS. 1 and 2, another embodiment of the invention in a front view, both inside and outside the housing 21 of the Mill shows arranged system components.
- the compression element 7 is designed as a compression plate 7a.
- the compression plate 7a is rigidly connected to the support arm 12, for example welded to the support arm 12, screwed to it or riveted to it.
- the entire support arm 12 together with the compacting plate 7a rigidly attached to it is adjusted in order to change the distance between the compacting plate 7a and the surface 8 of the plate 1 facing the roller 3.
- an adjusting device 11 is arranged on the outside of the housing 21 of the mill.
- This adjusting device 11 can be designed, for example, as a spindle drive or as a hydraulic system, for example with an adjustable hydraulic ram.
- a sensor 14 for measuring the forces acting on the installation 6 is arranged on the outside of the housing 21 of the mill.
- the sensor 14 is connected to a control and regulating device, also not shown, via lines not shown, analogous to the description for FIG. 2.
- the compression plate 7a is divided into two parts 34, 35.
- the two parts 34, 35 each have a different length in their direction of extension transversely to the roller 3.
- the two parts 34, 35 are angled relative to one another, as shown in more detail in FIG. 5. Because of the perspective chosen for FIG. 3, the angle between the parts 34, 35 in FIG. 3 cannot be seen.
- the longer part 35 of the compression plate 7a is positioned so that it diverts the ground material 2 radially inwards towards the center of the plate 1 (indicated by the arrow 37 pointing to the right.
- the shorter part 34 is positioned so that it removes the ground material 2 radially outwardly over the edge 36 of the plate 1 (indicated by the arrow 38 pointing to the left), so that the ground material diverted in this way reaches the ground material circulation.
- the compression plate 7a can also be designed in one piece.
- the diversion of the ground material can then only be influenced in one direction (either in the direction of the center of the plate or radially outwards over the edge 36 of the plate 1) through the setting angle.
- FIG. 4 shows another embodiment of the invention compared with FIGS. 1 to 3.
- the compression element 7 is designed here as a compression pipe 19.
- the compression pipe 19 is rotatably mounted on a shaft 18.
- the shaft 18 is connected to the compression pipe 19 in a rotationally fixed manner.
- the shaft 18 is arranged eccentrically to the central axis 41 of the compression pipe 19.
- the measuring device 9, not shown in FIG. 4, and the control and regulating device 10, also not shown, can be arranged and designed analogously to the exemplary embodiments according to FIGS. 1 to 3. Instead of being arranged in the interior of a hollow support arm, the sensors and / or the components of the adjustment device can be arranged in the interior of the compression pipe 19.
- FIG. 5 shows a compression plate 7a which is divided into two parts 22, 23.
- the two parts 22, 23 are arranged in planes Ei and E 2 and form an angle ⁇ between them.
- the two-part compression plate 7a thus acts like a plow on the ground material 2 in the installed state.
- the mutually adjacent parts 22, 23 of the connecting plate 7a extend in different planes Ei, E 2 , the planes Ei, E 2 enclosing an angle ⁇ of less than 180 ° with one another.
- the angle a is approximately in the range from 130 ° to 160 °.
- FIG. 6 shows the same division of the compression plate 7a into two parts 22, 23 as FIG. 5, but the parts 22, 23 are tilted at an angle ⁇ in the direction of the support arm 12.
- This tilting of the compression plate 7a creates a wedge-shaped material intake.
- the grist 2 By rotating the grinding track, the grist 2, in Compared to the previously vertically arranged compression plate 7a, in this tilted variant more ventilated and compressed.
- FIG. 7 shows a three-part compression plate 7a.
- the parts 22 and 23 are designed in a manner comparable to that in FIG. 5, with a third part 40 additionally provided, which lies in a plane E 3 which is aligned parallel to a reference plane B which is perpendicular to the surface 8 of the plate 1 and in which a central longitudinal axis of the support arm 12 extends.
- Such a design of the compression plate 7a achieves that the ground material is enriched at one position of the grinding track and compressed more strongly.
- the grinding bed 5 can be prepared in a targeted manner depending on the shape of the grinding track and / or the roller geometry.
- the tilt angle ⁇ can be in the range between 0 ° and 40, preferably between 5 ° and 30 °.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019210047.3A DE102019210047B3 (de) | 2019-07-08 | 2019-07-08 | Vertikal-Rollenmühle |
PCT/EP2020/067079 WO2021004757A1 (de) | 2019-07-08 | 2020-06-19 | Vertikal-rollenmühle |
Publications (1)
Publication Number | Publication Date |
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EP3996849A1 true EP3996849A1 (de) | 2022-05-18 |
Family
ID=70859575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20735283.2A Pending EP3996849A1 (de) | 2019-07-08 | 2020-06-19 | Vertikal-rollenmühle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3996849A1 (de) |
DE (1) | DE102019210047B3 (de) |
WO (1) | WO2021004757A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2765130B2 (ja) * | 1989-12-01 | 1998-06-11 | 宇部興産株式会社 | 竪型粉砕機 |
DE4202784C2 (de) * | 1992-01-31 | 2002-08-08 | Loesche Gmbh | Luftstrom-Wälzmühle |
DE19806896A1 (de) * | 1998-02-19 | 1999-09-02 | Pfeiffer Ag Geb | Vorrichtung zur Vergleichmäßigung des Mahlbettes von Walzenschüsselmühlen |
JP2000140663A (ja) * | 1998-11-09 | 2000-05-23 | Babcock Hitachi Kk | ローラミル |
DE102012106553B4 (de) * | 2012-07-19 | 2014-05-22 | Thyssenkrupp Resource Technologies Gmbh | Zerkleinerung von Mahlgut in einer Vertikalrollenmühle |
DE102012106554A1 (de) * | 2012-07-19 | 2014-05-15 | Thyssenkrupp Resource Technologies Gmbh | Verfahren und Anlage zur Zerkleinerung von Mahlgut mit einer Rollenmühle |
JP6656805B2 (ja) | 2014-12-22 | 2020-03-04 | 川崎重工業株式会社 | 竪型ローラミル |
-
2019
- 2019-07-08 DE DE102019210047.3A patent/DE102019210047B3/de active Active
-
2020
- 2020-06-19 EP EP20735283.2A patent/EP3996849A1/de active Pending
- 2020-06-19 WO PCT/EP2020/067079 patent/WO2021004757A1/de unknown
Also Published As
Publication number | Publication date |
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DE102019210047B3 (de) | 2020-06-18 |
WO2021004757A1 (de) | 2021-01-14 |
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