EP3714981B1 - Treatment plant, in particular crushing plant, in particular rock crusher - Google Patents

Description

Processing plant, in particular crushing plant, in particular rock crusher, with a feed unit that can be filled with material to be crushed, with a screening unit having a pre-screen being arranged behind the feed unit or in the feeding unit in the conveying direction, with the pre-screen being able to be set in oscillating motion by means of an oscillating drive, and with part of the supplied material being fed to a subsequent process unit, in particular a crushing unit, via the screening unit and another part being screened out in the screening unit.

Such treatment plants are used for various purposes. They are used, for example, to screen out rock material in crushing plants. Such crushing plants can be used for crushing rock material and can be used either as mobile or as stationary plants. The material to be crushed is fed into the system via the feeding unit. Excavators are usually used for this purpose. Starting from the feed unit, the material to be shredded is conveyed to the screening unit with a conveying device. The screen unit can have different designs. Designs are known in which the screen unit forms a simple conveying trough which is provided with openings in order to achieve a screening effect (grate trough). Furthermore, constructions are already known in the state of the art in which a screen deck is used as a circular or elliptical vibrator. One or more additional screen levels are installed below a conveyor chute. The rock material is fed to a crushing unit via a conveyor. For example, the crushing unit can be a jaw crusher. During transport via the upstream unit (grate channel or screen), part of the material fed in is screened out, this screened-out fraction is bypassed in the crushing unit bypassed so that it does not burden the crusher. It is now possible to transport the screened partial fraction either via the crusher discharge belt or it is possible to transport it out of the working area of the machine via a separate conveyor. Sidebands are usually used for this. The user now has the opportunity to choose whether he wants to run one or the other mode of operation. To do this, he has to set an adjustable flap of the conveying device either to the bypass position or to the conveying position.

Such a plant is from DE 10 2017 112 091 A1 known.

During operation, such crushing plants are charged with different filling materials, depending on the selected location or purpose. It often happens that the filling material has a high proportion of fines, which cannot be completely screened out in the screening unit and which then puts a strain on the crushing unit. This reduces the efficiency of the crushing unit.

EP 0 382 922 A2 discloses a jaw crusher with a crushing aggregate. Crushed material can be fed to this crushing unit via a crushed material feed device. The crushed material feed device has a feed hopper 20 and an oscillating conveyor associated therewith. A bar screen is arranged downstream of the vibrating conveyor in the transport direction. With the bar screen, a rock fraction can be screened out of the supplied material in front of the crushing unit. The rock fraction, which was fed to the crushing unit via the bar screen, is crushed there and placed on a discharge belt. The material screened in the bar screen area is also fed onto the discharge belt.

A crushing plant that works in a similar way is out DE 41 38 597 A1 known. Here, too, a jaw crusher is used as the crushing unit, to which the material to be crushed can be fed via a feed conveyor. The feed conveyor has a Ground on, which can be in the form of a bar grating. In the conveying direction after the bottom, another screen is arranged, which is part of the feed conveyor. The bottom and the other screen are excited with a vibration exciter so that material can be screened out. A first rock fraction is screened out in the area of the bar grate and a second rock fraction is screened out in the area of the further screen. The first rock fraction reaches a crusher discharge belt. The second rock fraction is crushed in the crushing unit and then also reaches the crusher discharge belt.

It is now the object of the invention to provide a processing plant of the type mentioned at the outset, with which the process unit connected to the screening unit, for example the crushing unit, can be effectively relieved, even with a wide variety of filling materials.

This object is achieved in that another screen is arranged in front of the screen unit in the conveying direction and is driven by a vibration exciter, and that a control device is provided by means of which the vibration drive and the vibration exciter are controlled separately from one another.

The fact that the screening unit is preceded by a further screen results in an effective enlargement of the total available screen area. This increases the dwell time of the filling material in the screen area, which makes improved screening possible. As a result of the different excitations of the pre-screen and the further screen, the screening process is significantly more effective and the load on the downstream process unit is therefore lower. In particular, the different excitations can be selected in such a way that they develop an optimal screening effect adapted to the respective filling material.

According to the invention, any type of unit with which a screening effect can be achieved can be used as a preliminary screen or as an additional screen. Accordingly, roller grates, grate channels or the like can also be used in particular for this purpose.

According to a preferred variant of the invention, it is provided that a transport section of the feed unit, in particular a feed chute, is arranged in the conveying direction before the further screen, and that the transport section can be made to vibrate independently of the pre-screen, preferably of the vibration exciter. Accordingly, the transport section and the preliminary screen can be optimally adjusted to the tasks to be performed by these structural units. The vibration of the transport section can be designed in such a way that an optimal conveying effect and an even distribution of the material fed in is achieved. Accordingly, the vibration of the pre-screen can be designed for optimized screening.

In order to reduce the outlay on parts and assembly, provision can be made in particular for the feed unit and the further screen to form a structural unit which is connected to the vibration exciter and is driven by it to generate vibratory movements. Accordingly, the feed unit and the additional screen can be driven by a common vibration exciter. In addition, these assemblies can then be combined to form a compact unit.

According to one embodiment of the invention, it can be provided that the vibration drive and the vibration exciter are controlled by the control device in such a way that the pre-screen and the additional screen and/or the pre-screen and the transport section of the feed unit each perform an oscillating movement, with the oscillating movement of the pre-screen and the oscillating movement of the additional screen or the oscillating movement of the pre-screen and the transport section differing in the form of excitation, excitation intensity, excitation direction and/or excitation frequency. This makes it possible to set the pre-screen and the transport section or the pre-screen and the additional screen individually and suitably for the upcoming screening task.

A processing plant according to the invention can be such that the additional screen is driven by a linear vibrator in order to set the additional screen into linear vibrations or into essentially linear vibrations in the conveying direction. In this way, an oscillation that supports the conveying effect is set with the additional screen and the transport section of the feed unit that is optionally coupled thereto. In this way, the transport of the filling material to the preliminary screen can be supported or effected.

It is also conceivable within the scope of the invention for the pre-screen to be driven by a circular vibrator in order to set the pre-screen in circular vibrations or rotating vibrations and for the screen surface of the pre-screen to run inclined in the conveying direction, with the screen surface of the pre-screen preferably forming an angle in the range between 6° and 10° with the horizontal. The circular vibrations or the rotating vibrations lead to an optimized screening effect in the area of the preliminary screen. In order to be able to transport the filling material remaining on the pre-screen in a simple manner, the screen surface of the pre-screen is inclined relative to the horizontal in accordance with the above information. The angular range specified above has proven to be particularly advantageous when used in rock crushing plants.

According to a possible variant of the invention, a processing plant can be designed in such a way that the feed unit has a feed section with a base, which is in particular part of a feed chute, the base being merged into the screen surface of the additional screen, that the additional screen is interchangeably coupled to a mechanical interface of the feed unit by means of a fastening section, and that the interface is equipped to accommodate a closed base instead of the additional screen. In this way, the treatment plant can be adapted to the desired application as a kit, depending on the task at hand. If a filling material is fed in that requires an intensive screening effect to relieve the downstream process unit, the additional screen can be installed. But it is If there is filling material that can already be sufficiently screened simply by using the pre-screen, a closed bottom is installed instead of the additional screen. It is also conceivable that several other screens with different screening effects are used in order to be able to make further adjustments to the processing plant.

To reduce the outlay on parts and assembly, it can be provided that the feed unit has side walls that delimit a conveying chute laterally and in the conveying direction, and that the side walls extend at least partially in the conveying direction to the side of the additional screen in order to delimit a continuous transport area. A compact design can also be realized as a result.

According to one embodiment of the invention, it can be provided that the additional screen has a free end that faces the pre-screen, that the pre-screen has a feed area that faces the free end of the additional screen, that the feed area is offset downwards in the direction of gravity, forming a step compared to the free end of the additional screen, and that the height of the step is preferably at least 50 mm, particularly preferably in the range between 50 mm and 500 mm. In this way, the filling material is circulated during the transition from the further screen to the pre-screen, thereby further improving the screening effect.

A conceivable variant of the invention is such that a diverting element is arranged in the direction of gravity below the further screen, by means of which the partial fraction screened out by the further screen can be transported away, that the diverting element is preferably set in oscillating motion together with the further sieve by the vibration exciter, and that the diverting element is preferably designed as a chute, for example made of rubber material. The sieved fraction of the filling material can be reliably transported away from the working area of the further sieve via the deflection element. In particular, this prevents the machine from being impaired by dirt.

Due to the fact that the diversion element can be set in an oscillating movement together with the further screen, a transport movement induced by the oscillating movement can also be used for transport on the diversion element. Since a common vibration exciter is used, the number of parts is reduced. In addition, the diverting element then does not have to have a particularly strong inclination to support the transport effect, so that a low overall height can be achieved. A simple construction results when using a chute made of rubber material as the discharge element.

A further embodiment of the invention can be such that an additional screen deck is arranged below the pre-screen, in particular below an upper deck of the screen lining of the pre-screen, to which the fraction screened by the pre-screen (upper deck) is at least partially fed, and that a transport section for discharging the material screened by the additional screen deck is arranged below the additional screen deck. With the additional screen deck, another fine sub-fraction can be screened out of the material that has already been screened, which can also be separately conveyed out of the working area of the machine.

In the context of the invention, it can be provided that the discharge element extends below the further screen and the preliminary screen. In this way, the material screened out by both screens can be discharged together via a single discharge element.

Alternatively, it can also be provided that the deflection element has an end section which is guided to the lower screen deck in order to direct the material screened out by the further screen to the screening area of the lower screen deck. The material screened out by the further screen can then be subjected to a further screening process on the lower screen deck in order to be able to screen out a fine partial fraction here as well.

According to a particularly preferred variant of the invention, it can be provided that the preliminary screen has a discharge area at its end facing away from the further screen, which is led to a crushing unit of a crushing plant, the crushing unit preferably having a stationary crushing jaw and a movable crushing jaw opposite it, and that a crusher discharge belt or another suitable means for transporting away the material crushed by the crushing unit is arranged below the crushing unit.

In order to prevent the further screen from being damaged when the feed unit is loaded, it can be provided that the feed unit and the further screen together form a transport area, with the further screen preferably enclosing the transport area in the conveying direction, and that the further screen in the conveying direction covers a maximum of half, particularly preferably only a maximum of one third, of the length of the transport area in this conveying direction. This prevents the majority of the filling material from getting directly onto the screen area during loading. It is thus achieved in a simple manner that the additional screen is protected from excessive loads.

Figur 1:

in schematischer Prinzipdarstellung eine mobile Brechanlage in Seitenansicht,

Figur 2:

eine der Figur 1 entnommene Detaildarstellung und

Figur 3:

das Detail gemäß Figur 2 in perspektivischer Ansicht und in Schnittdarstellung.

The invention is explained in more detail below with reference to an exemplary embodiment illustrated in the drawings. Show it:

Figure 1:

in a schematic representation of the principles of a mobile crushing plant in side view,

Figure 2:

one of the figure 1 extracted detail and

Figure 3:

the detail according to figure 2 in a perspective view and in a sectional view.

figure 1 shows a processing plant, namely a mobile crushing plant 10, as is typically used for crushing rock material or other mineral material. This mobile crushing plant 10 has a Machine chassis, which is supported by two running gears 11 designed as chain drives.

The crushing plant 10 is equipped with a feed unit 20 which is usually designed as a hopper-shaped feed unit with two hopper side walls 21 and a hopper rear wall 22 . The crushing plant 10 can be filled with the material to be crushed via this feed unit 20 . The feed unit 20 has a transport device on the bottom. The material to be comminuted is conveyed to a screening unit 30 via this conveying device. The screen unit 30 is associated with a vibration exciter 38, which can be designed as an eccentric drive. With this vibration exciter 38, the screen unit 30 can be made to vibrate in order to subject the conveyed material to a screening process. The vibration exciter 38 not only causes the screen unit 30 to vibrate for screening purposes, but also, in connection with the inclined arrangement of one or more screen decks, a transport effect, as in the case of a vibrating conveyor, is achieved.

How figure 1 can be seen, the coarse rock fraction, which is not screened out, is conveyed from the screening unit 30 to a crushing unit 40 . In the present case, the crushing unit 40 is designed in the form of a jaw crusher. This crushing unit 40 has two crushing jaws 42, 43 which form a converging gap. The material to be comminuted is conveyed into this gap area. The crushing unit 40 has a fixed crushing jaw 42 and a movable crushing jaw 43. The movable crushing jaw 43 is driven by an eccentric drive 41.

How figure 1 can be seen, the coarse rock material is broken in the converging fissure. The crushed and crushed rock material leaves the crushing unit 40 on the bottom side and falls onto a crusher discharge belt 60 due to the force of gravity.

The crushed rock material is discharged via the crusher discharge belt 60 and piled up next to the crushing plant 10 .

A magnetic separator 61 is provided on the crushing plant 10 in the area of the crusher discharge belt 60 . This is arranged above the material flow, which is guided on the crusher discharge belt 60 . Metal parts in the material flow are magnetically attracted by the magnetic separator 61 and separated from the material flow.

As can be seen from the drawing, the material coming from the feed unit 20 is guided in the screening unit 30 over a preliminary screen 32 (e.g. upper screen deck). Part of the rock material is screened out. These are pieces of rock which, because of their size, do not have to be sent through the crushing unit 40 since they are already of a size which roughly corresponds to the size of the rock which is broken by the crushing unit 40 . As can be seen from the drawing, part of this rock fraction that has been screened out is fed directly onto the crusher discharge belt 60, in a bypass past the crushing unit 40.

How figure 3 can be seen, below the preliminary screen 32 there is now a further lower screen deck 34 in the screen unit 30 . This lower screen deck 34 screens out another, fine partial fraction from the material that has already been screened out. The lower screen deck 34 is in figure 3 marked, the screen element belonging to the lower screen deck 34 not being shown for the sake of clarity. This screen element is mounted on supporting parts 33 of the bottom deck 34 of the screen. It is now sometimes desirable to separate this particularly fine partial fraction, for which purpose a side discharge belt 50 is used. The fine sub-fraction is fed onto this endlessly revolving side discharge belt 50, conveyed out of the working area of the crushing plant 10 and accumulated, like this figure 1 reveals.

It is now the case that it is not always desirable to discharge the fine partial fraction. Rather, the machine operator would like to have the choice of separating them or would like to give up directly on the crusher discharge belt 60 together with the coarser screened material. An adjustable flap chute 70 is used for this purpose.

As the figures 2 and 3 can be seen further, the screen unit 30 has two screen side walls 31 which are spaced apart from each other. The conveying area for the rock material is formed between the two screen side walls 31 . The representation shows that at least one of the screen side walls 31 has a receptacle for the vibration exciter 38 . The vibration energy of the vibration exciter 38 can thus be transferred to the pre-screen 32 . A different arrangement of the vibration exciter 38 is also conceivable, but it should be provided that the vibration energy from the vibration exciter 38 is introduced into the screen unit 30 so that the screen unit 30 (and with it the preliminary screen 32 and the lower screen deck 34) vibrates with the frequency and amplitude of the vibration exciter 38.

The preliminary screen 32 is held between the two screen side walls 31 in the upper area of the screen unit 30 . The bottom deck 34 of the screen is arranged below the preliminary screen 32 . A conveying area results between the pre-screen 32 and the lower screen deck 34 . Accordingly, filling material that was screened out by the preliminary screen 32 can be transported away on the screening element of the screening lower deck 34 . This transported material passes through an end piece 37 of the lower screen deck 34 directly onto the crusher discharge belt 60, like this figure 1 shows.

A conveying area is delimited above the pre-screen 32 by means of the two side walls and the pre-screen 32 .

Below the lower screen deck 34 there is another transport section 35. This transport section 35 can be designed as a flexible component, with the transport section extending in its longitudinal extension from the left side of the screen unit 30 to the adjustable flap chute 70. On the transport section 35, the filling material, which from the screen element of Sieve lower deck 34 was screened, are transported away. This fine screening material is discharged below the end piece 37 and can, as explained above, be routed either directly to the crusher discharge belt 60 or to the side discharge belt 50 when the adjustable flap chute 70 is in the appropriate position.

As the figures 2 and 3 can be seen further, two support sections 39 extend between the two sieve side walls 31. On these support sections 39, the pre-screen 32 is attached. The pre-screen 32 covers the area between the two screen side walls 31 of the screen unit 30. The pre-screen 32 has a feed area 32.1, which is merged into a screen area of the pre-screen 32. Opposite the feed area 32.1, the preliminary sieve 32 has a discharge area 32.2. This discharge area 32.2 is angled relative to the actual screen surface of the preliminary screen 32. Screw receptacles are provided in the dropping area 32.2. The preliminary sieve 32 can be screwed to the associated support section 39 by means of these screw receptacles. Additional screw receptacles are also provided in the area of the feed area 32.1 for screwing to the support section 39 assigned there. Furthermore, 32 fastening receptacles are provided on the longitudinal opposite ends of the pre-screen, by means of which the pre-screen 32 can be connected to the associated side walls 31 of the screen.

The dropping area 32.2 opens like this figure 1 can be seen directly in the crushing area, which is formed between the fixed and the movable crushing jaw 42, 43.

figure 3 clearly shows the vibration drive 38. This is positioned below the pre-screen upper deck 32 between the two screen side walls 31 .

From the figures 2 and 3 it is further clear that the chassis of the mobile crushing plant 10 has a boom 12 . This boom 12 carries a task unit 20. The task unit 20 has two opposite and in Conveying direction extending side walls 21 on. The feed unit 20 is closed off at the rear with the rear wall 22 . This results in a filling hopper that is open at the top and is closed off at the bottom with a feed chute.

The feed chute has a floor 23 . This floor 23 can be formed by a sheet metal element or by several sheet metal elements. How figure 3 can be seen, a further screen 24 is arranged between the two side walls 21 of the filling unit 20 . The additional screen 24 adjoins the bottom 23 in the conveying direction, preferably without a step. The further sieve 24 has at its end facing the base 23 a fastening section 24.1. The further sieve 24 is placed on an interface 26 of the feed unit 20 with this fastening section 24.1. This mechanical interface 26 can be formed, for example, by a carrier that extends transversely to the conveying direction. The additional screen 24 can be used with the interface 26 via suitable detachable fastening means, for example screws. The further screen 24 has a screen area adjoining the attachment section 24.1 in the conveying direction. In the region of its free end 24.2 facing away from the fastening section 24.1, the further screen 24 has a further support section of the mechanical interface 26 in order to enable stable support of the further screen 24.

The free end 24.2 of the other screen 24 protrudes in the conveying direction a little, overlapping the feed area 32.1. In addition, the task area 32.1 is offset downwards in the direction of gravity compared to the free end 24.2, resulting in a step.

A discharge unit 28 is arranged below the additional screen 24 . The discharge unit 28 is designed as an inclined chute, which can be formed from a flexible component, in particular from a rubber material. The discharge element 28 has an end section 28.1. The end section 28.1 is attached to the top of the screen element (in figure 3 not shown) of the lower screen deck 34 passed.

How figure 3 can further be seen, the task unit 20 has a vibration exciter, for example an eccentric drive. This vibration exciter serves to cause the feed unit 20 to vibrate. Because of this vibration, the conveying chute with its bottom 23 and the further screen 24 are set in vibrating movements together. Linear vibrations are preferably generated which run in the conveying direction or essentially in the conveying direction.

The operation is explained below with reference to figure 3 explained. The filling material to be processed is placed on the floor 23 of the feed unit 20 by means of an excavator. Due to the vibration generated by the vibration exciter 25, the filling material is moved from the bottom 23 over the additional screen 24 in the conveying direction. Here, in the screen area of the further screen 24, a partial fraction is screened out of the filling material. This sub-fraction reaches the discharge unit 28. Due to the oblique arrangement of the discharge unit 28, the screened-out material is transported to the end section 28.1 of the discharge unit 28. The discharge unit 28 is connected to the feed unit 20 in such a way that it is also made to vibrate when vibration is excited by the vibration exciter 25 . This oscillating movement supports the transport effect.

The filling material passed over the further screen 24 arrives at the pre-screen 32 via the step section between the further screen 24 and the pre-screen 32. The filling material is circulated here, which leads to an improved screening effect in the subsequent screening process on the pre-screen 32. The preliminary sieve 32 is preferably set in torsional vibration with the vibration drive 38 . A good screening effect is achieved in this way. Due to the inclination of the pre-screen 32 relative to the horizontal, a transport effect is supported, as has already been described above. At the pre-screen 32, another partial fraction is screened out of the filling material. This screened-out partial fraction falls onto the screening element of the screening lower deck 34. Another screening process takes place here, as has already been explained above.

If now a filling material is filled into the feed unit 20, which is to be subjected to a less intensive screening process, the additional screen 24 can be dismantled. In the process, it is detached from the mechanical interface 26 and removed. Instead of the additional screen 24, a closed base can then be attached to the mechanical interface 26. This closed floor then guides the filling material directly onto the pre-screen 32.

According to the invention, a control device is provided. With this, the preliminary sieve 32 and the further sieve 24 can be controlled separately from one another using the vibration drive 38 and the vibration exciter 25 . In this way, a significantly improved screening effect is achieved.

Claims (14)

1. Processing plant, in particular a mobile crushing plant (10), in particular a rock crusher, with a feed unit (20) which can be filled with a material to be crushed, wherein a screening unit (30) with a pre-screen (32) is arranged downstream of the feed unit (20) or in the feed unit (20) in a conveying direction, wherein the pre-screen (32) can be caused to oscillate by means of an oscillation drive (38), and wherein a portion of the material supplied is fed via the screening unit (30) to a subsequent processing unit (40), in particular a crushing unit (40), via the screening unit (30), and a further part being screened out in the screening unit (30), a further screen (24) being arranged upstream of the screening unit (30) in the conveying direction, which screen is driven by an oscillation exciter (25), characterized in that a control device is provided, by means of which the oscillation drive (38) and the oscillation exciter (25) are controlled separately from one another.
2. Processing plant according to claim 1, characterized in that a transport section of the filling unit (20), in particular a feed trough, is arranged upstream of the further screen (24) in the conveying direction, and in that the transport section can be caused to oscillate independently of the pre-screen (32), preferably by the oscillation exciter (25).
3. Processing plant according to claim 1 or 2, characterized in that the filling unit (20) and the further screen (24) form a structural unit which is connected to the oscillation exciter (25) and is driven by the latter to generate oscillation movements.
4. Processing plant according to any one of claims 1 to 3, characterized in that the oscillation drive (38) and the oscillation exciter (25) are controlled by the control device in such a way that the pre-screen (32) and the further screen (24) and/or the pre-screen (32) and the transport section of the filling unit (20) each perform an oscillating movement, wherein the oscillating movement of the pre-screen (32) and the oscillating movement of the further screen (24) or, respectively, the oscillating movement of the pre-screen (32) and the transport section differ in excitation form, excitation intensity, excitation direction and/or excitation frequency.
5. Processing plant according to any one of claims 1 to 4, characterized in that the further screen (24) is driven by a linear vibrator to cause the further screen (24) to vibrate linearly or to vibrate substantially linearly in the conveying direction.
6. Processing plant according to any one of claims 1 to 5, characterized in that the pre-screen (32) is driven by a circular oscillator to set the pre-screen (32) into circular or rotary oscillations and that the screening surface of the pre-screen (32) is inclined in the conveying direction, preferably the screening surface of the pre-screen (32) enclosing an angle in the range between 6° and 10° with the horizontal.
7. Processing plant according to any one of claims 1 to 6, characterized in that the filling unit (20) has a feed section with a bottom (23), which in particular is part of a feed trough, the bottom (23) being transitioned into the screen surface of the further screen (24), in that the further screen (24) is coupled by means of a fastening section (24. 1) to a mechanical interface (26) of the filling unit (20), and in that the interface (26) is equipped to receive a closed bottom instead of the additional screen (24).
8. Processing plant according to any one of claims 1 to 7, characterized in that the filling unit (20) has side walls (21) which delimit a conveying trough laterally and in the conveying direction, and in that the side walls (21) extend at least partially in the conveying direction laterally of the further screen (24) in order to delimit a continuous transport region.
9. Processing plant according to any one of claims 1 to 8, characterized in that the further screen (24) has a free end (24.2) which faces the pre-screen (32), in that the pre-screen (32) has a feed area (32.1) which faces the free end (24.2) of the further screen (24), in that the feed area (32. 1) is offset downwards in the direction of gravity relative to the free end (24.1) of the further screen (24), forming a step, and in that the height of the step is preferably at least 50 mm, and is particularly preferably selected to be in the range between 50 mm and 500 mm.
10. Processing plant according to any one of claims 1 to 9, characterized in that a deflector element (28) is arranged below the further screen (24) in the direction of gravity, by means of which deflector element the partial fraction screened out by the further screen (24) can be transported away, in that the deflector element (28) is preferably set in oscillating motion together with the further screen (24) by the oscillation exciter (25), and in that the deflector element (28) is preferably designed as a chute, for example of rubber material.
11. Processing plant according to any one of claims 1 to 10, characterized in that a screen subdeck (34) is arranged below the pre-screen (32), to which the fraction screened out by the pre-screen (32) is at least partially fed, and in that a transport section (35) is arranged below the screen subdeck (34) for discharging the material screened out by the screen subdeck (34).
12. Processing plant according to any one of claims 1 to 11, characterized in that the deflector element (28) extends below the further screen (24) and the pre-screen (32), or in that the deflector element (28) has an end portion (28.1) which is led to the screen subdeck (34) in order to guide the material screened out by the further screen (34) onto the screening area of the screen subdeck (34).
13. Processing plant according to any one of claims 1 to 12, characterized in that the pre-screen (32) has, at its end facing away from the further screen (24), a discharge region (32. 2) which is guided to a crushing unit (40) of a crushing plant, the crushing unit (40) preferably having a fixed crushing jaw (42) and a movable crushing jaw (43) opposite the latter, and in that a crusher discharge belt (60) or another suitable means for discharging the material crushed by the crushing unit (40) is arranged below the crushing unit (40).
14. Processing plant according to any one of claims 1 to 13, characterized in that the filling unit (20) and the further screen (24) together form a transport region, the further screen (24) preferably closing off the transport region in the conveying direction, and in that the further screen (24) covers, in the conveying direction, at most half, and particularly preferably only at most one third, of the length of the transport region in this conveying direction.

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