REPROCESSING PLANT

Description

[0001] The invention relates to a processing plant, in particular a crushing plant with a crushing unit, for the comminution of, in particular mineral, material, wherein a material feed area is provided, comprising a material feed device and a feed hopper, wherein the feed hopper is designed and arranged to feed material to be crushed to the material feed device, and the material feed device is designed and arranged to feed the material to be crushed to the crushing unit, wherein the feed hopper has at least one hopper wall, wherein a return conveyor is provided which is designed and arranged to feed oversize material coming from the crushing unit to the material feed area by means of an oversize chute, and wherein the oversize chute has a material guide area over which the oversize material is guided.

[0002] Within the scope of the invention, a crushing unit can be a jaw crusher unit comprising two crushing jaws, preferably one of which is fixed and the other movable. The crushing chamber is formed, at least partially, between the two crushing jaws. Preferably, the crushing jaws are arranged such that a tapered crushing chamber is formed. The two crushing jaws face each other in the region of a crusher outlet, which may be formed by a crushing gap.

[0003] Within the scope of the invention, a crushing unit can also be a rotary impact crusher. This unit has a crushing rotor that accelerates the material to be crushed and throws it against at least one wall element. Such rotary impact crusher units can have impact wings or the like as wall elements. The crushing rotor can be formed by a crushing cone or a crushing roller.

[0004] Within the scope of the invention, a crushing unit can also be a cone crusher, gyratory crusher or roller crusher or a similar crushing unit.

[0005] During operation, the processing plant can be filled with the mineral material to be crushed, for example, using a wheel loader. The material to be crushed is fed into the processing plant via the feed hopper. According to the invention, a material feeding device can be arranged, at least partially, in the area of ​​the feed hopper. This material feeding device could, for example, be a feed trough driven by a vibratory conveyor. Alternatively, the material feeding device could consist of a continuously circulating belt.

[0006] The material to be crushed is fed to a crushing unit via the material feed device. A screening unit can be arranged in the area of ​​the material feed device, positioned upstream of the crushing unit in the direction of material flow. The screening unit has at least one screen deck. The material to be crushed can be classified on the screen deck. Unscreened coarse material is fed directly to the crushing unit. A screened fraction can be bypassed around the crushing unit. This screened fraction already has a sufficient particle size and does not require further crushing. Therefore, it can be bypassed to avoid unnecessarily burdening the crushing unit.

[0007] It is also possible to screen out further fractions within the screening unit, which are then discharged from the working area of ​​the screening unit, for example, via a side discharge conveyor. The material bypassed around the crushing unit can, for instance, be directed onto a crusher discharge conveyor. This crusher discharge conveyor conveys the bypassed material, along with the crushed material coming from the crushing unit, out of the crushing unit's working area. A secondary screening unit can be arranged downstream of the crushing unit in the direction of material flow. The material discharged from the crusher discharge conveyor can be fed into this secondary screening unit, where classification takes place. Coarse material with excessively large particle sizes is not screened out in the secondary screening unit.This oversize material is then fed onto a return conveyor and reintroduced into the material flow in the conveying direction in front of the crushing unit.

[0008] Solutions are known from the prior art in which the return conveyor conveys the oversize material at its discharge end onto an oversize chute. The oversize chute carries this oversize material to the material feed unit. From the material feed unit, this material is then conveyed back through the screening unit. It can happen that the screen deck of the screening unit has a mesh size larger than that of the screen deck of the subsequent screening unit. In this case, oversize material is continuously recirculated. Such a processing plant is known from document CN 112 718 211 A.

[0009] The object of the invention is to provide a processing plant that enables performance-optimized machine operation.

[0010] This task is solved by assigning at least one adjustable material guiding element to the oversize chute.

[0011] With the adjustable material guide element, the machine operator can decide how to configure the material guide area of ​​the oversize chute, depending on the machine configuration. For example, an adjusting element could be used as the material guide element, which can be adjusted between at least one preset and a second fully extended operating position to modify the material guide area. The adjusting element allows the material guide area to be extended or modified so that the oversize material is directed to the crushing unit, bypassing the screening unit completely or partially. This reduces or eliminates the load on the screening unit, resulting in optimized machine operation.

[0012] It is also conceivable that the oversize chute is designed in such a way as to prevent or at least partially reduce the problem described above, in which oversize material is transported in an endless loop. In particular, it is conceivable that the discharge area of ​​the oversize chute is extended and / or adjusted towards the crushing unit, whereby the oversize material can then be guided in such a way that it is no longer, or only partially, screened out at the screening unit, and in particular, is guided completely or partially past the screening unit. According to a preferred embodiment of the invention, the actuating element can therefore be adjusted between the two operating positions in order to change the size and / or position of the discharge area of ​​the material guide section, at least in part.

[0013] A preferred embodiment of the invention is such that the hopper wall of the feed hopper is pivotable about a pivot axis between a folded-down transport position and an unfolded operating position, and that the oversize chute and the actuating element are attached to the hopper wall and pivotable with it. The hopper wall can thus be moved from its upright operating position to the folded-down transport position to enable space-saving machine transport. To prevent the oversize chute from obstructing the folding of the hopper wall in confined spaces, the actuating element can be adjusted accordingly to its set operating position.

[0014] A compact design for the oversize chute can be achieved, for example, by having the actuating element have a material guide area that extends the material guide base of the oversize chute in its second extended operating position, compared to the first set operating position.

[0015] Preferably, it can be provided that the discharge area of ​​the oversize chute in the displayed operating position is formed at least partially by the material guidance area, preferably by a displayed part of the material guidance area.

[0016] In order to easily feed the oversize material towards the crushing unit via the oversize chute, according to one embodiment of the invention, the actuating element can be adjusted from the first set operating position to the second extended operating position in such a way that the discharge area of ​​the oversize chute is adjusted and / or extended in the material conveying direction of the material feed device.

[0017] For orderly material handling, it can be advantageous for the actuating element to have a side wall that laterally limits the material handling area. If, in addition, the side wall is designed to act as a stop in the set operating position, limiting the actuating element's movement, then the side wall is advantageously assigned an additional function.

[0018] A reliable adjustment of the actuating element can then be designed to be structurally simple if it is provided that the actuating element can be pivoted about a pivot axis between the set and the displayed operating position by means of a bearing, wherein the pivot axis preferably runs perpendicular to the material guide base.

[0019] To optimize wear on the oversize chute, the actuating element can be fitted with one or more wear-resistant elements, and these elements can form at least part of the material guide area. It is particularly preferred that the material guide areas of the hopper walls are made, at least in part, of the same material as the material guide area of ​​the oversize chute. This optimizes the number of parts and the handling effort.

[0020] To achieve a compact design in which the actuating element is stored in a space-saving manner in the set position, it can be provided that the actuating element has a support which, in the set position of the actuating element, is positioned behind the rear of a base part of the oversize chute, wherein the support is adjustableally guided on the base part by means of guide elements in the area of ​​the rear.

[0021] One conceivable variant of the invention is such that a screening unit is arranged in the direction of material flow upstream of the crushing unit, which has at least one screen deck, and that a bypass channel is connected to the screening unit, through which a fraction screened out by the screening unit is routed past the crushing unit.

[0022] As mentioned above, a processing plant according to the invention can also be such that a post-screening device is arranged in the material flow direction after the crushing unit, which has at least one screen deck, wherein the oversize material is separated on the screen deck and this is fed directly or indirectly, preferably via a snag belt, onto the feed area of ​​the return conveyor.

[0023] The object of the invention is also solved with a processing plant according to claim 13, wherein it is provided that the adjustable material guidance element is a guiding element to direct the material flow according to the operator's wishes in the area of ​​the oversize chute.

[0024] In particular, it may be provided that the adjustable guide element is arranged in such a way that the material flow in the material guiding area can be changed in the various positions of the guide element.

[0025] The guide element allows the machine operator to decide, depending on the machine configuration, how to design the material handling area of ​​the oversize chute. For example, it is conceivable that the guide element can be used to modify the material handling area so that the oversize material is directed to the crushing unit, bypassing the screening unit completely or partially. This reduces or eliminates the load on the screening unit, resulting in optimized machine operation.

[0026] It is also conceivable that the guide element could be adjusted to prevent or at least partially reduce the problem described above, in which oversize material is transported in an endless loop. In particular, it is conceivable that the discharge area of ​​the oversize chute could be extended and / or adjusted towards the crushing unit, so that the oversize material is guided in such a way that it is no longer, or only partially, screened out at the screening unit, and in particular, is completely or partially diverted past the screening unit.

[0027] A simple design can be achieved if the guide element is pivotally coupled to the oversize chute by means of a swivel bearing. The swivel bearing also allows for quick, reliable, and easy adjustment of the guide element.

[0028] To reliably guarantee continuous operation, the guide element may be designed to include a guide device to which at least one wear protection element is attached in the material guidance area. The same material used to line the crusher walls can also be used for this wear protection element.

[0029] In a simplified design variant, the guide element may have a support section that rests on the material guide base. This support section includes an adjustment section, at least partially equipped with an elongated hole extending in the direction of the guide element's adjustment, and a clamping element is guided within this elongated hole. The support section provides stable support for the guide element on the material guide base, ensuring reliable positioning even under heavy loads. To adjust the guide element, the clamping element can be released, allowing the guide element to be moved. For example, the support section may act as a sliding guide for the adjustment movement on the material guide base. Once the desired position is reached, the guide element can be re-secured with the clamping element.

[0030] The invention will be explained in more detail below with reference to an embodiment illustrated in the drawings. The drawings show: Figure 1 schematic representation of a processing plant in side view, Figure 2 in perspective view a feed hopper of the processing plant according to Figure 1 , Figure 3 one of the Figure 2 Detail taken from an enlarged view, Figure 4 the feed hopper according to the Figures 2 to 3 in a changed operating position and Figure 5 A detailed view of the oversize chute from a different perspective.

[0031] Figure 1 Figure 1 shows a processing plant in the form of a crushing plant 10. The crushing plant 10 is designed as a mobile crushing plant and therefore has chassis 15. However, it is also conceivable that the crushing plant 10 is a stationary crushing plant.

[0032] The crushing plant 10 has a chassis 11 which supports the machine components or at least some of the machine components. At its rear end, the chassis 11 has a boom 12. A material feed area is formed in the area of ​​the boom 12.

[0033] The material feed area includes a feed hopper 20 and a material feed device 16.

[0034] The feed hopper 20 can be formed, at least partially, by hopper walls 21 extending in the direction of the longitudinal extent of the crushing plant 10 and a rear wall 22 extending transversely to the longitudinal extent. The feed hopper 20 leads to the material feed device 16.

[0035] The material feed device 16 can, as shown in the present embodiment, have a conveying trough that can be driven by a vibratory drive. Material to be crushed can be fed into the crushing plant 10 via the feed hopper 20, for example by means of a wheel loader, and fed onto the conveying trough.

[0036] From the conveying trough, the material to be shredded enters the area of ​​a screening unit 30. This screening unit 30 can also be referred to as a pre-screening arrangement. At least one screen deck 30.1, 30.2 is arranged in the area of ​​the screening unit 30. In the present embodiment, two screen decks 30.1, 30.2 are used.

[0037] At the upper screen deck 30.1, a partial fraction is screened out of the material to be crushed. This partial fraction already has a sufficient particle size that no longer needs to be crushed in the crushing plant 10. Therefore, this screened partial fraction can be routed in a bypass channel 31 past a crushing unit 40.

[0038] If a second screen deck 30.2 is used in the screening unit 30, a further fine particle fraction can be screened from the sub-fraction that accumulates below the screen deck 30.1. This fine particle fraction is conveyed below the screen deck 30.2 to a side discharge conveyor 32. From the side discharge conveyor 32, the fine particle fraction is discharged and conveyed to a stockpile 70.2 located to the side of the machine.

[0039] How Figure 1As illustrated, the screening unit 30 can be a vibrating screen with a screen drive 33. The screen drive 33 sets the screen deck 30.1 and / or the screen deck 30.2 into vibratory motion. Due to the inclined arrangement of the screen decks 30.1, 30.2, and in conjunction with the vibratory motion, material is transported on the screen decks 30.1, 30.2 towards the crushing unit 40 or the bypass channel 31, respectively.

[0040] The material to be crushed, coming from the screen deck 30.1, is fed to the crushing unit 40, as shown here. Figure 1 This can be seen.

[0041] The crushing unit 40 can, for example, be designed in the form of a rotary impact crushing unit. The crushing unit 40 then has a crushing rotor 42 which is driven by a motor 41. Figure 1 The rotation axis of the refractive rotor 42 runs horizontally in the direction of the image depth.

[0042] The crushing rotor 42 can, for example, be equipped with impact bars 43 on its outer circumference. Opposite the crushing rotor 42, wall elements, preferably in the form of impact arms 44, can be arranged. When the crushing rotor 42 is rotating, the material to be crushed is thrown outwards by the impact bars 43. This material then strikes the impact arms 44 and is crushed due to the high kinetic energy. If the material to be crushed has a sufficient particle size to allow the material particles to pass through the gap between the impact arms 44 and the radially outer ends of the impact bars 43, the crushed material leaves the crushing unit 40 via the crusher outlet 45.

[0043] It is conceivable that in the area of ​​the crusher outlet 45, the crushed material coming from the crushing unit 40 is combined with the material coming from the bypass channel 31 and conveyed onto a belt conveyor 13. The belt conveyor 13 can then transport the material out of the working area of ​​the crushing unit 40.

[0044] As the drawings show, the belt conveyor 13 can have an endlessly circulating conveyor belt with a loaded side 13.3 and an unloaded side 13.4. The loaded side 13.3 serves to collect and transport the crushed material that falls from the crusher outlet 45 of the crushing unit 40. At the belt ends, the conveyor belt can be deflected between the loaded side 13.3 and the unloaded side 13.4 by means of deflection rollers 13.1, 13.2. In the area between the deflection rollers 13.1, 13.2, guides, in particular support rollers, can be provided to change the conveying direction of the conveyor belt, to give the conveyor belt a specific shape, and / or to support the conveyor belt.

[0045] The belt conveyor 13 has a belt drive by means of which the belt conveyor 13 can be driven. The belt drive can preferably be arranged at the discharge end 13.5 or in the area of ​​the discharge end 13.5 of the belt conveyor 13.

[0046] The belt conveyor 13 can be connected to a control unit via a control line, for example by means of the belt drive.

[0047] According to the invention, one or more further belt conveyors 60 and / or a return conveyor 80 can be used, which in principle have the same design as the belt conveyor 13. In this respect, reference can be made to the preceding explanations.

[0048] In the area between the feed end and the discharge end, a magnet 14 can be arranged above the load section 13.3. The magnet 14 can be used to lift iron parts from the broken material and move them out of the conveying area of ​​the belt conveyor 13.

[0049] In the transport direction downstream of the belt conveyor 13, a secondary screening device 50 can be arranged. The secondary screening device 50 has a screen housing 51 in which at least one screen deck 52 is housed. Below the screen deck 52, a lower housing section 53 is formed, which serves as a collection chamber for the material screened out at the screen deck 52.

[0050] The lower part of the housing creates a spatial connection to another belt conveyor 60 via an opening. Here, the second belt conveyor 60 forms its feed section 61, whereby the screened material is directed onto the load side of the second belt conveyor 60 in the feed section 61. The second belt conveyor 60 conveys the screened material to its discharge end 62. From there, the screened material is transferred to a stockpile 70.2.

[0051] The material not screened at the screen deck 52 of the secondary screen 50 is conveyed from the screen deck 52 onto a conveyor belt 54. The conveyor belt 54 can also be designed as a belt conveyor, so reference can be made to the explanations given above regarding the belt conveyor 13. The conveyance direction of the conveyor belt 54 is in Figure 1 in the direction of the image depth.

[0052] At its discharge end, the conveyor belt 54 transfers the unsifted material, also known as oversize, to the feed area 81 of the return conveyor 80. The return conveyor 80, which can be a belt conveyor, conveys the oversize towards the feed hopper 20. At its discharge end 82, the return conveyor 80 transfers the oversize back into the material flow, specifically into the material feed area. The oversize can then be fed back to the crushing unit 40 and crushed there to the desired particle size.

[0053] The return conveyor 80 transfers the oversize material in the area of ​​its discharge end 82 into the material feed area by means of an oversize chute 27, which is located in Figure 2 shown.

[0054] Figure 2 This illustrates that the hopper walls 21 can each be coupled to the chassis 11 directly or indirectly by means of an actuating unit 23. The actuating unit 23 allows the hopper walls 21 to be separated from the chassis 11. Figure 2 The depicted operating position is located in a... Figure 4 The shown folded-down transport position can be swivelled.

[0055] Figure 2 This illustrates that the rear panel 22 can be pivotally coupled to the chassis 11 either directly or indirectly by means of an actuating unit 25. The actuating unit 25 allows the rear panel 22 to be pivoted away from the chassis 11, in which Figure 2 depicted, established operating position in a Figure 4 The shown folded-down transport position can be swivelled.

[0056] In the erected operating position, the funnel walls 21 are coupled to the rear wall 22 at connection areas 24, so that a funnel contour is formed here.

[0057] Preferably, at least one of the hopper walls 26 is extended in its area facing away from the rear wall 22 by means of the oversize chute 27. For example, the hopper wall 21 may have a coupling area 26 to which the oversize chute 27 is connected or attached. In the coupling area, a connecting section 27.2 may be used, which is connected to the hopper wall 21 via a coupling piece 27.1. Preferably, the arrangement is such that the connecting section 27.2 is flared outwards relative to the hopper contour formed by the hopper wall 21 and facing the hopper chamber. This facilitates the filling of the oversize material from the discharge end 82 of the return conveyor 80.

[0058] In the present embodiment, the oversize chute 27 preferably has a base part 27.15, which may be angled away from the connecting section 27.2. It is conceivable that the base part 27.15 forms a material guidance area 27.4. The material guidance area 27.4 may have wear protection elements 27.3, which are applied to the base part 27.15, preferably screwed on. The wear protection elements 27.3 are made of a wear-resistant material. In particular, the wear protection elements 27.3 are more wear-resistant than the material that forms the base part 27.15.

[0059] In the Figure 2 In the illustrated operating position, the oversize chute 27 forms the discharge end of the oversize chute 27 at its lower end region. Opposite the discharge end, the oversize chute 27 has a wall 27.5, which is preferably angled away from the base part 27.15.

[0060] The oversize chute 27 has an adjusting element 28 that is adjustable between at least one first set and a second extended operating position in order to change the material guiding area 27.4. Figure 2 The operating position shown is displayed. Figures 4 and 5 show the set operating position of the oversize chute 27.

[0061] How Figure 5 As illustrated, the actuating element 28 has a support 28.9, from which a side wall 28.2 may be bent. Figure 2 Illustrates that the carrier 28.9 forms a material guidance area 28.3 on its front side, which may be covered with wear protection elements 28.1.

[0062] A bearing 28.4, in particular a pivot bearing, can be used to adjust the adjusting element 28. The pivot bearing can in particular form a pivot axis which is formed and / or arranged in the end region of the oversize chute 27 opposite the discharge end of the oversize chute 27.

[0063] To guide the actuating movement of the actuating element 28, a guide 28.6 can be provided, which may, for example, be in the form of an elongated slot. A guide element 28.7 works in conjunction with the guide 28.6, which, as Figure 5 illustrated, for example, that it can be mounted in the area of ​​the back of the base part 27.15.

[0064] How Figure 5 As further illustrated, in the area of ​​a body edge of the actuating element 28, a further guide element 28.5 can be provided in order to guarantee stable guidance of the actuating movement of the actuating element 28 in a simple manner.

[0065] To stiffen the actuating element, a bend 28.8 and / or a strut 28.10 can be used, which can be arranged in particular on the back of the support 28.9.

[0066] Figure 3 Figure 27.6 illustrates that a guide element 27.6 can be arranged in the material guidance area 27.4. The guide element 27.6 has a guide device 27.13, which can be formed by a wall. The guide device 27.13 preferably has one or more wear protection elements 27.12. The wear protection elements 27.12 can be made of the same material as the wear protection elements 28.1 and 27.3.

[0067] It is conceivable that a support section 27.7 is connected directly or indirectly to the guide device 27.13, with the support section 27.7 resting on the material guide area 27.4.

[0068] The guide element 27.6 is pivotally coupled to the oversize chute 27 by means of a pivot bearing 27.11. The pivot bearing 27.11 can, for example, be formed by a bore in the guide element 27.6 through which a bearing pin of the oversize chute 27 passes. Preferably, the pivot bearing 27.11 is protected on the side of the guide device 27.13 opposite the wear protection elements 27.12. In particular, the pivot bearing 27.11 can be formed by the support section 27.7.

[0069] The guide element 27.6 can also have an adjusting section 27.8 equipped with a clamping element 27.10. The adjusting section can be used to guide and / or fix the adjustment of the guide element 27.6. For fixing, the clamping element 27.10 can, for example, be clamped to the oversize slide 27. For this purpose, an elongated hole 27.9 may be provided in the adjusting section 27.8. The clamping element 20.10, designed as a screw bolt, projects through this elongated hole 27.9, and a nut can be screwed onto the screw bolt to achieve clamping.

[0070] To bring the crushing plant 10 into its intended operating position, the hopper walls 21 and the rear wall 22 can be removed from the Figure 4 shown transport positions in the Figure 2The upright operating positions shown can be adjusted. When the hopper walls 21 are erected, the machine operator can move the adjusting element 28 into the position shown. Figure 2 or 3 Bring the displayed operating position shown. This is easily possible because the side panel 28.2 provides a handle with which the adjustment movement can be effected.

[0071] The positioning movement of the actuating element 28 takes place about the pivot axis of the bearing 28.4. As soon as the in Figure 2 Once the indicated position is reached, the actuating element 28 can be fixed in its displayed position, for example with a clamping element. Alternatively, automatic locking, for example via friction and / or gravity, is also conceivable. The clamping element can be separated from the guide element 28.7 (see Figure 5 ) be educated.

[0072] During operation, the oversize material is conveyed from the return conveyor 80 to the oversize chute 27. The oversize material then enters the material feed via the material guide area 28.3 of the actuating element 28 and / or the material guide area 27.4 of the base part 27.15.

[0073] If the user wishes to further influence the material flow of the oversize material, he can adjust the guide element 27.6 to a desired position, whereby the pivoting movement of the guide element 27.6 takes place around the pivot bearing 27.11.

[0074] How Figure 3 As illustrated, the material flow in the oversize chute 27 can be directed by means of the guide element 27.6 towards the material guidance area 28.3 of the actuating element 28, so that the discharge area of ​​the oversize chute 27 shifts more towards the crushing unit 40.

[0075] Within the scope of the invention, it can therefore be provided, for example, that the material flow, preferably with the adjustable actuating element 28 and / or with the guide element 20.6, is designed in such a way that the oversize material is conveyed indirectly or directly to the crushing unit 40 via the oversize chute 27, bypassing the sieve unit 30.

[0076] It is also conceivable that the material flow with the adjusting element 28 and / or with the guiding element 20.6 is designed in such a way that the oversize material is at least partially applied to the screening unit 30, but to an area of ​​the screening unit that is further in the direction of material flow towards the crushing unit 40.

[0077] This allows the sieve unit 30 to be relieved of pressure.

Claims

1. A processing plant, in particular a crushing plant (10) with a crushing unit (40), for comminution of material, in particular mineral material, wherein a material feed section, comprising a material feed device (16) and a feed hopper (20), is provided, wherein the feed hopper (20) is designed and arranged to feed material to be comminuted to the material feed device (16), and the material feed device (16) is designed and arranged to feed the material to be comminuted to the crushing unit (40), wherein the feed hopper (20) comprises at least one hopper wall (21), wherein a return conveyor (80) is provided, which is designed and arranged to convey oversize material coming from the crushing unit (40) to the material feed section via an oversize chute (27), and wherein the oversize chute (27) comprises a material-guiding section (27.4) through which the oversize material is conveyed, characterized in that at least one adjustable material-guiding element (28, 27.6) is associated with the oversize chute (27).

2. The processing plant according to claim 1, characterized in that the adjustable material-guiding element (28, 27.6) is an adjusting element (28) that is movable between at least a first retracted operating position and a second extended operating position in order to alter the material-guiding section (27.4).

3. The processing plant according to claim 1 or 2, characterized in that the adjusting element (28) is movable between the two operating positions to alter the discharge area of the material-guiding section in terms of its size and / or position, at least in certain regions.

4. The processing plant according to any one of claims 1 through 3, characterized in that the hopper wall (21) of the feed hopper (20) is pivotable about a pivot axis between a folded-down transport position and an unfolded operating position, and in that the oversize chute (27) and the adjusting element (28) are attached to the hopper wall (21) and are pivotable therewith.

5. The processing plant according to any one of claims 1 through 4, characterized in that the adjusting element (28) comprises a material-guiding section (28.3) that extends a material-guiding bottom (27.4) of the oversize chute (27) in its second extended operating position, compared to the first retracted operating position, wherein it is preferably provided that the discharge area of the oversize chute (27) in the extended operating position is formed, at least in part, by the material-guiding section (28.3), preferably by an extended portion of the material-guiding section (28.3).

6. The processing plant according to any one of claims 1 through 5, characterized in that the adjusting element (28) is movable from the first retracted operating position to the second extended operating position in such a way that the discharge area of the oversize chute (27) is moved and / or extended in the material conveying direction of the material feed device (16).

7. The processing plant according to any one of claims 1 through 6, characterized in that the adjusting element (28) comprises a side wall (28.2) that laterally bounds the material-guiding section (28.3) and that, preferably in the retracted operating position, acts as a stop to limit the adjusting movement of the adjusting element (28).

8. The processing plant according to any one of claims 1 through 7, characterized in that the adjusting element (28) is pivotable about a pivot axis between the retracted and the extended operating positions by means of a bearing (28.4), wherein the pivot axis preferably extends perpendicular to the material-guiding bottom.

9. The processing plant according to any one of claims 1 through 8, characterized in that the adjusting element (28) is equipped with one or more wear protection elements (28.1), and that the wear protection elements (28.1) form the material-guiding section (28.3) at least in some regions.

10. The processing plant according to any one of claims 1 through 9, characterized in that the adjusting element (28) comprises a carrier (28.9) which, in the set position of the adjusting element (28), is moved behind the rear side of a base part (27.15) of the oversize chute (27), wherein the carrier (28.9) is adjustably guided by means of guide elements (28.5, 28.7) in the region of the rear side of the base part.

11. The processing plant according to any one of claims 1 through 10, characterized in that a screening unit (30) is arranged upstream of the crushing unit (40) in the direction of material flow, which screening unit comprises at least one screen deck (30.1, 30.2), and that a bypass channel (31) is connected to the screening unit (30), through which a fraction screened out by the screening unit (30) is routed past the crushing unit (40).

12. The processing plant according to any one of claims 1 through 11, characterized in that a secondary screening device (50) is arranged downstream of the crushing unit (40) in the direction of material flow, which secondary screening device comprises at least one screen deck (52), wherein the oversize material (52) is separated and fed directly or indirectly-preferably via a cross conveyor belt (51)-onto the feed area (81) of the return conveyor (80).

13. The processing plant according to any one of claims 1 through 12, characterized in that the adjustable material-guiding element (28, 27.6) is a directing element (27.6).

14. The processing plant according to claim 13, characterized in that the adjustable directing element (27.6) is arranged in the material-guiding section (27.4) in order to alter the material flow in the material-guiding section (27.4) in the various setting positions of the directing element (27.6).

15. The processing plant according to claim 13 or 14, characterized in that the directing element (27.6) is pivotably coupled to the oversize chute by means of a pivot bearing (27.11).

16. The processing plant according to any one of claims 13 through 15, characterized in that the directing element (27.6) comprises a directing device (27.13) to which at least one wear protection element (27.12) is attached in the material-guiding section.

17. The processing plant according to any one of claims 13 through 16, characterized in that the directing element (27.6) comprises a support section (27.7) that is supported on the material-guiding bottom (27.4), that the support section (27.7) comprises an adjustment section (27.8) that is provided, at least in some areas, with a slot (27.9) extending in the adjustment direction of the directing element (27.6), and that a clamping element (27.10) is guided in the slot (27.9).

18. The processing plant according to any of the preceding claims, characterized in that the oversize chute (27) comprises, as adjustable material-guiding elements, at least one adjusting element (28) and at least one directing element (27.6).