Pre-treatment device
By introducing adjustable material guiding elements into the oversized particle chute, the load problem of the screening unit caused by oversized particles is solved, thereby improving the operating efficiency of the crushing equipment and the processing efficiency of oversized particles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KLEEMANN
- Filing Date
- 2022-07-12
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, excessively large particles can easily lead to overloading of the screening unit during the crushing process, resulting in low mechanical operating efficiency and poor continuous recycling efficiency for excessively large particles.
By equipping the chute for oversized particles with adjustable material guiding elements, operators can adjust the conveying path of oversized particles as needed, allowing them to bypass or partially bypass the screening unit and be directly conveyed to the crushing unit, thus reducing the load on the screening unit.
The mechanical operating efficiency has been optimized, the burden on the screening unit has been reduced, the processing efficiency of oversized particles has been improved, and a more efficient crushing process has been achieved.
Smart Images
Figure CN115672472B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a pretreatment apparatus for crushing, particularly mineral materials, and especially a crushing apparatus having a crushing unit, comprising a material input area including a material input mechanism and a hopper, wherein the hopper is constructed and arranged to guide the material to be crushed to the material input mechanism, and the material input mechanism is constructed and arranged to convey the material to be crushed to the crushing unit, wherein the hopper has at least one funnel wall, wherein a return conveyor is provided, the return conveyor being constructed and arranged to guide oversized particles from the crushing unit to the material input area via an oversized particle chute, and wherein the oversized particle chute has a material guiding area through which the oversized particles are guided. Background Technology
[0002] In this invention, the crushing unit can be a jaw crusher unit, which has two crushing jaw plates, preferably one of which is fixed and the other is movable. A crushing space is at least partially formed between the two crushing jaw plates. Therefore, it is preferred that the crushing jaw plates correspond to each other, thereby obtaining a gradually narrowing crushing space. The two crushing jaw plates are opposite each other in the region of the crusher outlet, wherein the crusher outlet may be formed by a crushing gap.
[0003] In this invention, the crushing unit can also be a rotary vibratory crusher unit. This rotary vibratory crusher unit has a crushing rotor that accelerates the material to be crushed and throws it towards at least one wall element. Such a rotary vibratory crusher unit may have an impact vibrating section or the like as a wall element. The crushing rotor can be formed from a crushing cone or a crushing roller.
[0004] In this invention, the crushing unit can also be a cone crusher, a rotary crusher, a roller crusher, or a similar crushing unit.
[0005] During operation, the pretreatment equipment, for example, can be loaded with the mineral material to be crushed using a wheel loader. The material to be crushed is then fed into the pretreatment equipment via a hopper. In this invention, the material input mechanism can be arranged at least partially in the area of the hopper. The material input mechanism can be, for example, an input trough driven by a vibrating conveyor. It is also conceivable that the material input mechanism be formed by a continuously looping belt.
[0006] The material to be crushed is conveyed to the crushing unit via a material input mechanism. A screening unit can be arranged in the area of the material input mechanism, positioned upstream of the crushing unit along the material flow direction. Each screening unit has at least one screen plate. The material to be crushed can be sorted on the screen plate. Unscreened coarse material is directly conveyed to the crushing unit. The screened portion can be guided in a bypass path beside the crushing unit. This screened portion already has a suitable particle size and requires no further crushing. Therefore, it is guided past the crushing unit without being loaded.
[0007] Other portions can also be screened out in the screening unit, for example, by means of a side discharge belt, from the working area of the screening unit. Material passing by the crusher unit in the bypass can be guided, for example, onto the crusher discharge belt. This crusher discharge belt will then output the material guided in the bypass, along with the crushed material from the crusher unit, from the working area of the crusher unit. A fine screening device can be arranged after the crusher unit along the material flow direction. Material output from the crusher discharge belt can be guided to the fine screening device for classification. Coarse material with excessive particle size is not screened out in the fine screening device as oversized particles. These oversized particles are then delivered to a return conveyor and fed back into the material flow along the conveying direction before the crusher unit.
[0008] In the prior art, a known implementation scheme is that a return conveyor transports oversized particles to an oversized particle chute at its discharge end. The oversized particle chute then transports the oversized particles to the material input mechanism. From the material input mechanism, the material is then guided again via a screening unit. It is possible that the screen plate of the screening unit has a larger mesh size than the screen plate of the fine screening unit. Thus, the oversized particles are guided in a continuous loop. Summary of the Invention
[0009] The purpose of this invention is to provide a pretreatment device that enables optimized machine operation.
[0010] This objective is achieved by equipping the slide with at least one adjustable material guiding element for excessively large particles.
[0011] Machine operators can determine, based on their machine configuration, how to design the material guiding area of the oversized particle chute using adjustable material guiding elements. For example, it is conceivable to use an adjusting element that can be adjusted at least between a retracted first operating position and an expanded second operating position to change the material guiding area. With the help of the adjusting element, the material guiding area can be expanded or altered, allowing oversized particles to be conveyed to the crusher unit completely or partially bypassing the screening unit. This results in less or no load on the screening unit, leading to optimized machine operation.
[0012] It is also conceivable that the oversized particle chute is designed to prevent or at least partially reduce the aforementioned problems of continuously circulating oversized particles. In particular, it is conceivable to extend and / or adjust the discharge area of the oversized particle chute toward the crusher unit, in which oversized particles can be guided so that they are no longer or only partially screened at the screening unit, and especially pass completely or partially beside the screening unit.
[0013] Therefore, according to a preferred variation of the invention, the adjusting element can be adjusted between two operating positions, such that the size and / or position of the unloading area of the material guiding region is changed at least partially.
[0014] A preferred design of the present invention is that the hopper wall can swing around a swing axis between a tilted transport position and a tilted operating position, and the oversized particle chute and adjusting element are fixed to the hopper wall and can swing together with it. The hopper wall can be brought from its upright operating position into the tilted operating position accordingly, enabling space-saving mechanical transport. To ensure that the oversized particle chute does not obstruct the tilting of the hopper wall in situations with limited space, the adjusting element can be adjusted accordingly to its retracted operating position.
[0015] A compact structure for an oversized particle slide can be achieved, for example, by having an adjustment element with a material guiding region that expands the material guiding bottom of the oversized particle slide in its extended second operating position compared to its retracted first operating position.
[0016] Preferably, the unloading area of the large particle chute is formed, at least partially, by the material guiding area in the expanded operating position, preferably by the expanded portion of the material guiding area.
[0017] In order to convey oversized particles toward the crusher unit in a simple manner via the oversized particle chute, a variation of the present invention allows the adjusting element to be adjusted from a retracted first operating position to an extended second operating position, thereby adjusting and / or expanding the unloading area of the oversized particle chute along the material conveying direction of the material input mechanism.
[0018] To guide the material in an orderly manner, the adjusting element can advantageously have sidewalls that laterally limit the material guiding area. If, in the retracted operating position, the sidewalls are further configured to act as stops limiting the adjusting movement of the adjusting element, then additional functions are advantageously assigned to the sidewalls.
[0019] When the adjusting element can swing around the swing axis between the retracted running position and the extended running position with the help of the support, the adjusting element can be reliably adjusted with a simple structure, wherein the swing axis is preferably perpendicular to the bottom extension of the material guide.
[0020] To optimize the operation of the large particle chute, the adjusting element can be equipped with one or more anti-wear elements, and these anti-wear elements at least partially form a material guiding region. Particularly preferably, the material guiding region of the funnel wall can be at least partially made of the same material as the material guiding region of the large particle chute. This optimizes components and operating costs.
[0021] To achieve a space-saving, compact structure for the adjustment element in its retracted position, the adjustment element may have a support that, after being adjusted to the rear of the base component of the oversized particle slide in the retracted position, is adjustablely guided in the rear region of the base component by means of a guide element.
[0022] A conceivable variation of the invention is designed such that a screening unit is arranged in the direction of material flow before the crusher, the screening unit having at least one screen plate and a bypass channel connected to the screening unit, the portion screened by the screening unit being guided past the crusher via the bypass channel.
[0023] As described above, the pretreatment equipment according to the invention can also be configured such that a fine screening device is arranged after the crusher unit along the material flow direction, the fine screening device having at least one screen plate, wherein oversized particles are separated on the screen plate and delivered directly or indirectly, preferably via a stitching belt, to the delivery area of the return conveyor.
[0024] The object of the present invention is also achieved by means of a pretreatment device according to the invention, wherein the adjustable material guiding element is configured as a guiding element to guide the material flow in the area of the oversized particle chute according to the operator's expectations.
[0025] In particular, the adjustable guide elements can be arranged such that the material flow in the material guiding region can be varied in different adjustment positions of the guide elements.
[0026] With the aid of guide elements, machine operators can determine how to design the material guiding area of the oversized particle conveyor, depending on the machine configuration. For example, it is conceivable to alter the material guiding area using guide elements, allowing oversized particles to be conveyed to the crusher unit completely or partially bypassing the screening unit. This reduces or eliminates the load on the screening unit, resulting in optimized machine operation.
[0027] It is also conceivable that the guiding elements are configured to prevent or at least partially reduce the aforementioned problems of continuously transporting oversized particles. In particular, it is conceivable to extend and / or adjust the discharge area of the oversized particle chute toward the crusher unit, wherein the oversized particles can be guided so that they are no longer or only partially screened at the screening unit, and especially pass completely or partially beside the screening unit.
[0028] A simple structure can be achieved when the guide element is oscillatingly coupled to a slide for excessively large particles using a oscillating bearing. The oscillating bearing also allows for quick, reliable, and easy adjustment of the guide element.
[0029] To reliably ensure continuous operation, the guide element can be configured to have a guide mechanism, with at least one anti-wear element fixed to the guide mechanism in the material guiding area. The anti-wear element may also be made of the same material used for lining the crusher wall.
[0030] A simplified structural modification allows the guide element to have a support section that rests on the bottom of the material guide. This support section also includes an adjustment section, which has at least partially an elongated hole extending along the adjustment direction of the guide element. The clamping element is guided within this elongated hole. The support section securely supports the guide element on the bottom of the material guide, ensuring reliable positioning even under severe stress. To adjust the guide element, the clamping element can be released, allowing the guide element to move. For example, the support section can function as a sliding guide for the adjustment movement on the bottom of the material guide. Once the desired position is reached, the clamping element can be used to re-secure the guide element. Attached Figure Description
[0031] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. Wherein are shown:
[0032] Figure 1 A side view of the pretreatment equipment is shown.
[0033] Figure 2 It shows according to Figure 1 A three-dimensional view of the hopper of the pretreatment equipment.
[0034] Figure 3 It shows Figure 1 Enlarged images of details in the image.
[0035] Figure 4 It shows according to Figures 2 to 3 The hopper in changing operating positions, and
[0036] Figure 5 A 3D detail diagram showing the changes in the oversized particle track is provided. Detailed Implementation
[0037] Figure 1 A pretreatment device in the form of a crushing device 10 is shown. The crushing device 10 is configured as a movable crushing device, and therefore has a traveling mechanism 15. However, it is also conceivable that the crushing device 10 is a stationary crushing device.
[0038] The crushing equipment 10 has a base frame 11 that carries mechanical components or at least a portion of them. The base frame 11 has a cantilever 12 at its rear end. A material input area is formed in the region of the cantilever 12.
[0039] The material input area includes a hopper 20 and a material input mechanism 16.
[0040] The hopper 20 may be formed at least partially by a funnel wall 21 extending in the longitudinal direction of the crushing device 10 and a rear wall 22 extending transversely to the longitudinal direction. The hopper 20 leads to the material input mechanism 16.
[0041] The material input mechanism 16 may have a conveying trough, as shown in this embodiment, which can be driven by a vibration driver. The material to be crushed can be loaded into the crushing equipment 10 via the hopper 20, for example by a wheel loader, and delivered to the conveying trough.
[0042] The material to be crushed arrives at the area of the screening unit 30 from the conveying trough. The screening unit 30 can also be referred to as a pre-screening assembly. At least one screen plate 30.1, 30.2 is arranged in the area of the screening unit 30. In this embodiment, two screen plates 30.1, 30.2 are used.
[0043] A sub-fraction is screened from the material to be crushed on the upper screen plate 30.1. This sub-fraction has a suitable particle size that does not require further crushing in the crushing unit 10. In this respect, the screened sub-fraction can be guided past the crusher unit 40 in the bypass passage 31.
[0044] If a second screen plate 30.2 is used in the screening unit 30, a further fine particle portion can be screened from the sub-section falling below the screen plate 30.1. The fine particle portion is guided below the screen plate 30.2 to the side discharge belt 32. The fine particle portion is guided away by the side discharge belt 32 and conveyed to the stockpile 70.2 arranged on the side of the machine.
[0045] like Figure 1 As seen, the screening unit 30 can be a vibrating screen with a screening drive 33. The screening drive 33 places the screen plate 30.1 and / or screen plate 30.2 in a vibrating motion. Due to the inclined arrangement of the screen plates 30.1, 30.2 and their association with the vibrating motion, material is transported on the screen plates 30.1, 30.2 toward the crusher unit 40 or the bypass channel 31.
[0046] The material to be crushed from screen plate 30.1 is guided to crusher unit 40, such as... Figure 1 As can be seen in the text.
[0047] The crusher unit 40 can, for example, be configured as a rotary vibratory crusher unit. The crusher unit 40 then has a crushing rotor 42, which is driven by a motor 41. Figure 1 The rotation axis of the medium crushing rotor 42 extends horizontally along the direction of the drawing depth.
[0048] The crushing rotor 42 may be equipped with impact slats 43, for example, on its outer circumferential surface. A wall element, preferably in the form of an impact vibrating section 44, may be arranged opposite the crushing rotor 42. As the crushing rotor 42 rotates, the material to be crushed is thrown outward by the impact slats 43. Here, the material collides with the impact vibrating section 44 and is crushed based on high kinetic energy. If the material to be crushed has a suitable particle size that allows material particles to pass through the gap between the radially outer ends of the impact vibrating section 44 and the impact slats 43, the crushed material exits the crusher unit 40 through the crusher outlet 45.
[0049] It is conceivable that the crushed material from the crusher unit 40, along with the material from the bypass channel 31, is guided together in the area of the crusher outlet 45 and brought onto the belt conveyor 13. The belt conveyor 13 can then be used to remove the material from the working area of the crusher unit 40.
[0050] As shown in the attached figures, the belt conveyor 13 may have a continuously looping conveyor belt with a loaded return section 13.3 and an unloaded return section 13.4. The loaded return section 13.3 is used to collect and remove the crushed material falling from the crusher outlet 45 of the crusher unit 40. At the belt end, the conveyor belt can be reversed between the loaded return section 13.3 and the unloaded return section 13.4 by means of reversing rollers 13.1 and 13.2. Guides, especially support rollers, may be provided in the area between the reversing rollers 13.1 and 13.2 to change the conveying direction of the conveyor belt, provide a specific shape for the conveyor belt, and / or support the conveyor belt.
[0051] The belt conveyor 13 has a belt driver that can drive the belt conveyor 13. The belt driver is preferably arranged on or in the region of the discharge end 13.5 of the belt conveyor 13.
[0052] The belt conveyor 13 can be connected to the control mechanism via control lines, for example, by means of a belt driver.
[0053] According to the present invention, one or more additional belt conveyors 60 and / or return conveyors 80 may be used, which in principle have the same structural form as belt conveyor 13. Reference can be made to the foregoing embodiments for this.
[0054] Magnet 14 can be arranged on the load return section 13.3 in the area between the delivery end and the discharge end. Magnet 14 can be used to lift iron components from the crushed material and move them out of the conveying area of the belt conveyor 13.
[0055] A fine screening device 50 may be arranged after the belt conveyor 13 along the transport direction. The fine screening device 50 has a screening housing 51 in which at least one screen plate 52 is installed. A lower part 53 of the housing is formed below the screen plate 52, which serves as a collection chamber for the material screened on the screen plate 52.
[0056] The lower part of the housing provides spatial connection to another belt conveyor 60 via an opening. This other belt conveyor 60 forms its delivery area 61, in which the screened material is guided onto the load return section of the other belt conveyor 60. The other belt conveyor 60 transports the screened material to its discharge end 62. The screened material reaches the stockpile 70.1 from the discharge end.
[0057] Material not screened on the sieve plate 52 of the fine screening device 50 is conveyed from the sieve plate 52 to the sewing belt 54. The sewing belt 54 can also be constructed as a belt conveyor, as can be seen in the embodiment described above regarding the belt conveyor 13. The transport direction of the sewing belt 54 is... Figure 1 It extends along the direction of the drawing depth.
[0058] The stitching belt 54 transfers the unscreened material, also known as oversized particles, at its discharge end to the delivery area 81 of the return conveyor 80. The return conveyor 80, which can be configured as a belt conveyor, transports the oversized particles toward the hopper 20. At its discharge end 82, the return conveyor 80 transfers the oversized particles back into the material flow, specifically into the material input area. Thus, the oversized particles can be re-conveyed to the crusher unit 40 and crushed into the desired particle size.
[0059] The return conveyor 80, in the region of its discharge end 82, by means of Figure 2 The oversized particle chute 27 shown transfers oversized particles to the material input area.
[0060] Figure 2 As shown, the funnel wall 21 can be indirectly or directly coupled to the base frame 11 via the adjustment unit 23. The adjustment unit 23 allows the funnel wall 21 to be adjusted from... Figure 2 The vertical operating position shown in the figure deflects to Figure 4 The overturned transport location is shown in the image.
[0061] Figure 2As shown, the rear wall 22 can be indirectly or directly deflectedly coupled to the base frame 11 via the adjustment unit 25. The adjustment unit 25 allows the rear wall 22 to be deflected from... Figure 2 The vertical operating position shown in the figure deflects to Figure 4 The overturned transport location is shown in the image.
[0062] In the upright operating position, the funnel wall 21 is coupled to the rear wall 22 at the connection area 24, thus forming a funnel profile there.
[0063] Preferably, at least one funnel wall 26 may be extended in its region opposite to the rear wall 22 by means of an oversized particle chute 27. For example, the funnel wall 21 may have a coupling region 26 to which the oversized particle chute 27 is connected or attached. In the region of the coupling region, for example, a connecting section 27.2 may be used, connected to the funnel wall 21 via a coupling member 27.1. Therefore, it is preferably arranged such that the connecting section 27.2 is outwardly oriented relative to the funnel profile formed by the funnel wall 21 and facing the funnel cavity. This allows for easy filling of oversized particles from the discharge end 82 of the return conveyor 80.
[0064] In this embodiment, the oversized particle slide 27 preferably has a base component 27.15, which can be bent from the connecting section 27.2. It is conceivable that the base component 27.15 forms a material guiding region 27.4. The material guiding region 27.4 may have an anti-wear element 27.3, which is applied, preferably screwed, onto the base component 27.15. The anti-wear element 27.3 is made of a wear-resistant material. Specifically, the anti-wear element 27.3 is made more wear-resistant than the material forming the base component 27.15.
[0065] exist Figure 2 In the shown operating position, the oversized particle chute 27 forms an oversized particle chute 27 discharge end in its lower end region. Opposite to the discharge end, the oversized particle chute 27 has a wall 27.5 that is preferably bent from the base component 27.15.
[0066] The oversized particle slide 27 has an adjustment element 28, which is adjustable at least between a retracted first running position and an extended second running position to change the material guiding area 27.4. Figure 2 The expanded running position is shown in the figure. Figure 4 and Figure 5 The running position of the retraction of the oversized particle slide 27 is shown.
[0067] like Figure 5 As shown, the adjusting element 28 has a bracket 28.9, and the side wall 28.2 can be bent from the bracket. Figure 2As shown, the bracket 28.9 forms a material guiding area 28.3 on its front side, which may be provided with an anti-wear element 28.1.
[0068] To adjust the adjusting element 28, a support portion 28.4, particularly a swing support portion, may be used. The swing support portion may particularly form a swing shaft, which is formed and / or arranged in the end region of the oversized particle chute 27 opposite to the discharge end of the oversized particle chute 27.
[0069] To guide the adjusting movement of the adjusting element 28, a guide portion 28.6 may be provided. The guide portion may be constructed, for example, in the form of an elongated hole. The guiding element 28.7 works in conjunction with the guide portion 28.6. Figure 5 As shown, it can be installed in the area on the rear side of the base component 27.15.
[0070] like Figure 5 It can also be seen that an additional guide element 28.5 may be provided in the area of the main body edge of the adjusting element 28 to ensure stable guidance of the adjusting movement of the adjusting element 28 in a simple manner.
[0071] To reinforce the adjusting element, chamfered portion 28.8 and / or diagonal brace 28.10 may be used, particularly on the rear side of bracket 28.9.
[0072] Figure 3 As shown, a guide element 27.6 may be arranged in the material guiding area 27.4. The guide element 27.6 has a guide mechanism 27.13, which may be formed by a wall portion. The guide mechanism 27.13 preferably has one or more abrasion-resistant elements 27.12. Here, the abrasion-resistant elements 27.12 may be formed of the same material as that used for the abrasion-resistant elements 28.1 and 27.3.
[0073] It is conceivable that the support section 27.7 is connected indirectly or directly to the guide mechanism 27.13, wherein the support section 27.7 is placed on the material guide area 27.4.
[0074] The guide element 27.6 is oscillatingly coupled to the oversized particle slide 27 via a sway bearing 27.11. The sway bearing 27.11 may be formed, for example, by a hole in the guide element 27.6 through which the bearing pin of the oversized particle slide 27 passes. Preferably, the sway bearing 27.11 is protectively mounted on the side of the guide mechanism 27.13 opposite to the wear-resistant element 27.12. In particular, the sway bearing 27.11 may be formed by a support section 27.7.
[0075] The guide element 27.6 may also have an adjustment section 27.8, which is equipped with a clamping element 27.10. The adjustment section can guide and / or fix the adjustment position of the guide element 27.6. For fixation, the clamping element 27.10 can be tensioned with the oversized particle slide 27. For this purpose, for example, an elongated hole 27.9 can be introduced in the adjustment section 27.8. The clamping element 20.10, configured as a bolt, extends through the elongated hole 27.9, through which a nut can be screwed on the bolt to achieve clamping.
[0076] In order to bring the crushing equipment 10 into its designated operating position, the hopper wall 21 and the rear wall 22 can be... Figure 4 The transport location shown in the image has been moved to... Figure 2 The machine is shown in the vertical operating position. When the funnel wall 21 is upright, the operator can bring the adjusting element 28 into place. Figure 2 or Figure 3 The extended operating position is shown. This is simple and feasible because the side wall 28.2 provides a handle for the machine operator, who can use the handle to adjust the movement.
[0077] The adjusting element 28 moves around the swing axis of the support 28.4. Once it reaches... Figure 2 The position shown can be used to fix the deployed position of the adjusting element 28, for example, by means of a clamping element. Alternatively, automatic fixing, such as by means of a friction connection and / or by means of a oscillating force, is also conceivable. The clamping element may be a guide element 28.7 (see [reference]). Figure 5 )form.
[0078] During operation, oversized particles are guided from the return conveyor 80 onto the oversized particle chute 27. The oversized particles then reach the material input section via the material guide area 28.3 of the adjusting element 28 and / or the material guide area 27.4 of the base component 27.15.
[0079] If the user wishes to further influence the flow of material with excessively large particles, the user will position the guide element 27.6 in the desired position, wherein the guide element 27.6 oscillates around the oscillating bearing 27.11.
[0080] like Figure 3 As shown, the material flow in the oversized particle chute 27 can be deflected towards the material guiding area 28.3 of the adjusting element 28 by the guide element 27.6, so that the unloading area of the oversized particle chute 27 is shifted more towards the crusher unit 40.
[0081] Therefore, in this invention, the material flow may preferably be designed with deployable adjustment element 28 and / or guide element 27.6, so that oversized particles are indirectly or directly guided to the crusher unit 40 via oversized particle chute 27 while bypassing the screening unit 30.
[0082] It is also conceivable that the material flow is designed with regulating elements 28 and / or guiding elements 27.6 so that although oversized particles are at least partially loaded onto the screening unit 30, they are loaded onto the area of the screening unit that is further displaced towards the crusher unit 40 along the material flow direction.
[0083] Therefore, the screening unit 30 can be unloaded.
Claims
1. A pretreatment device for crushing materials, comprising a material input area including a material input mechanism (16) and a hopper (20), wherein the hopper (20) is configured and arranged to guide the material to be crushed to the material input mechanism (16), and the material input mechanism (16) is configured and arranged to convey the material to be crushed to a crushing unit (40), wherein the hopper (20) has at least one funnel wall (21) and a return conveyor (80) is provided, the return conveyor being configured and arranged to guide oversized particles from the crushing unit (40) to the material input area via an oversized particle chute (27), and wherein the oversized particle chute (27) has a material guiding area (27.4) through which the oversized particles are guided. Its features are, At least one adjustable material guiding element (28, 27.6) is provided for the oversized particle slide (27).
2. The pretreatment equipment according to claim 1, characterized in that, The adjustable material guiding element (28, 27.6) is an adjusting element (28) that can be adjusted at least between a retracted first operating position and an extended second operating position to change the material guiding area (27.4).
3. The pretreatment equipment according to claim 2, characterized in that, The adjustment element (28) can be adjusted between two operating positions, such that the size and / or position of the unloading area of the material guiding area is changed at least partially.
4. The pretreatment equipment according to claim 2 or 3, characterized in that, The hopper wall (21) of the hopper (20) can swing around the swing axis between the down-turned transport position and the up-turned running position, and the oversized particle chute (27) and the adjusting element (28) are fixed on the hopper wall (21) and can swing together with it.
5. The pretreatment equipment according to claim 2 or 3, characterized in that, The adjusting element (28) has a material guiding region (28.3) that expands the material guiding bottom (27.4) of the oversized particle slide (27) in its deployed second operating position compared to its retracted first operating position.
6. The pretreatment equipment according to claim 5, characterized in that, The unloading area of the oversized particle chute (27) is at least partially formed by the material guiding area (28.3) in the second operating position of the unfolded structure.
7. The pretreatment equipment according to claim 6, characterized in that, The unloading area of the oversized particle chute (27) in the second operating position is at least partially formed by the unfolded portion of the material guiding area (28.3).
8. The pretreatment equipment according to claim 2 or 3, characterized in that, The adjusting element (28) can be adjusted from the retracted first operating position to the extended second operating position, so that the unloading area of the oversized particle chute (27) is adjusted and / or expanded along the material conveying direction of the material input mechanism (16).
9. The pretreatment equipment according to claim 2 or 3, characterized in that, The adjusting element (28) has a sidewall (28.2) that laterally limits the material guiding region (28.3).
10. The pretreatment equipment according to claim 9, characterized in that, The sidewall acts as a stop in the retracted first operating position, limiting the adjusting movement of the adjusting element (28).
11. The pretreatment apparatus according to claim 2 or 3, characterized in that, The adjusting element (28) can swing around the swing axis between the retracted first operating position and the deployed second operating position by means of the support (28.4).
12. The pretreatment equipment according to claim 11, characterized in that, The swing axis is perpendicular to the bottom extension of the material guide.
13. The pretreatment apparatus according to claim 2 or 3, characterized in that, The adjustment element (28) is provided with one or more anti-wear elements (28.1), and the anti-wear elements (28.1) at least partially form the material guiding region (28.3).
14. The pretreatment apparatus according to claim 2 or 3, characterized in that, The adjusting element (28) has a bracket (28.9) which is adjusted to the rear side of the base component (27.15) of the oversized particle slide (27) in the first operating position of the adjusted element (28) after being adjusted, wherein the bracket (28.9) is adjustablely guided in the region on the rear side of the base component (27.15) by means of guide elements (28.5, 28.7).
15. The pretreatment apparatus according to claim 2 or 3, characterized in that, A screening unit (30) is arranged in front of the crusher unit (40) along the material flow direction. The screening unit has at least one screen plate (30.1, 30.2) and a bypass channel (31) is connected to the screening unit (30). The portion screened by the screening unit (30) is guided to pass by the crusher unit (40) via the bypass channel.
16. The pretreatment apparatus according to claim 2 or 3, characterized in that, A fine screening device (50) is arranged after the crusher unit (40) along the material flow direction. The fine screening device has at least one screen plate (52) on which oversized particles are separated and delivered directly or indirectly to the delivery area (81) of the return conveyor (80).
17. The pretreatment apparatus according to claim 16, characterized in that, Oversized particles are separated on the sieve plate (52) and delivered via stitching tape (51) to the delivery area (81) of the return conveyor (80).
18. The pretreatment equipment according to claim 1, characterized in that, The adjustable material guiding element (28, 27.6) is the guiding element (27.6).
19. The pretreatment apparatus according to claim 18, characterized in that, An adjustable guide element (27.6) is arranged in the material guiding region (27.4) so that the material flow in the material guiding region (27.4) can be changed at different adjustment positions of the guide element (27.6).
20. The pretreatment apparatus according to claim 18 or 19, characterized in that, The guiding element (27.6) is oscillatingly coupled to the oversized particle slide by means of an oscillating bearing (27.11).
21. The pretreatment apparatus according to claim 18 or 19, characterized in that, The guiding element (27.6) has a guiding mechanism (27.13), on which at least one abrasion-resistant element (27.12) is fixed in the material guiding area.
22. The pretreatment apparatus according to claim 18 or 19, characterized in that, The guide element (27.6) has a support section (27.7) supported on the material guide bottom (27.4) such that the support section (27.7) has an adjustment section (27.8) at least partially provided with an elongated hole (27.9) extending along the adjustment direction of the guide element (27.6), and a clamping element (27.10) is guided in the elongated hole (27.9).
23. The pretreatment equipment according to claim 1, characterized in that, The oversized particle slide (27) has at least one adjusting element (28) and at least one guiding element (27.6) as adjustable material guiding elements.
24. The pretreatment equipment according to claim 1, characterized in that, The material is a mineral material.
25. The pretreatment equipment according to claim 1, characterized in that, The pretreatment equipment is a crushing equipment (10) with a crushing unit (40).