CN111744641A

CN111744641A - Pretreatment device, in particular a crushing device, in particular a rock crusher

Info

Publication number: CN111744641A
Application number: CN202010170610.1A
Authority: CN
Inventors: C·韦勒; W·施密德; S·伯格
Original assignee: Kelei Trowel Co ltd
Current assignee: Kelei Trowel Co ltd; Kleemann GmbH
Priority date: 2019-03-29
Filing date: 2020-03-12
Publication date: 2020-10-09
Also published as: EP3714981B1; EP3714981A1; DE102019108345A1; EP3714981C0

Abstract

The invention relates to a pretreatment device, in particular a comminution device, having a filling unit (20) which can be filled with material to be comminuted, wherein a screening unit (30) having a coarse screening section (32) is arranged downstream of the filling unit (20) or in the filling unit (20) in the conveying direction, wherein the coarse screening section (32) can be moved by means of a vibratory drive (38) in a vibratory manner, and wherein a part of the conveyed material is conducted to an adjoining process unit, in particular a comminution apparatus, via the screening unit (30) and another part is screened out in the screening unit (30). In order to reduce the load on the process unit, according to the invention, a further screening section (24) is arranged in front of the screening unit (30) in the conveying direction, said further screening section being driven by the vibration exciter (25), and a control device is provided, by means of which the vibration drive (38) and the vibration exciter (25) are actuated separately from one another.

Description

Pretreatment device, in particular a crushing device, in particular a rock crusher

Technical Field

The invention relates to a pretreatment device, in particular a crushing device, in particular a rock crusher, having a delivery unit which can be filled with material to be crushed, wherein a screening unit having a coarse screen section is arranged downstream of or in the delivery unit in a conveying direction, wherein the coarse screen section can be moved in a vibratory motion by means of a vibratory drive, and wherein a part of the conveyed material is transferred via the screening unit to an adjoining process unit, in particular a crushing device, and another part is screened in the screening unit.

Background

Such pre-treatment devices are used for different purposes. It is used for example for screening rock material in crushing plants. Such crushing apparatus may be used to crush rock material and may be used as a mobile or stationary apparatus. The material to be crushed is filled into the apparatus via a delivery unit. Excavators are commonly used for this purpose. The material to be comminuted is conveyed from the delivery unit to the screening unit by means of a conveying device. The screening units can have different designs. The known screening units form a simple structural form of a conveyor chute which is provided with notches to achieve a screening effect (wire mesh chute). Furthermore, the use of screening covers as a construction form of circular or oval vibrators is known in the prior art. One or more additional screening planes are installed below the conveyor chute. Rock material is transported to the crushing device via a conveyor. The crushing device may be a jaw crusher, for example. During the transport through the upstream unit (wire mesh chute or screen), a part of the transported material is screened out, the screened-out part being bypassed at the crusher device, so that it does not load the crusher. The sieved-out sub-fraction can then be transported away via a breaker draw belt or the sieved-out sub-fraction can be transported away from the working area of the machine via a separate transport device. Side belts are generally used for this purpose. The user can now choose whether he wishes to proceed in one or the other of the working modes. For this purpose, the user must set the movable valve of the delivery device into the bypass position or the delivery position.

Such a device is known from DE 102017112091 a 1.

During operation, such crushing plants are loaded with different filling materials depending on the selected application or purpose. The filling material usually has a large fine fraction which cannot be screened out completely in the screening unit and is then loaded into the crushing device. Thereby reducing the rate of action of the crushing device.

Disclosure of Invention

The object of the invention is to provide a pretreatment device of the type mentioned at the outset, by means of which process units, such as comminution apparatuses, connected to a screening unit can be effectively unloaded even when the filling material differs.

This object is achieved in that a further screening section is arranged in the conveying direction upstream of the screening unit, which further screening section is driven by the vibration exciter, and in that a control device is provided, by means of which the vibration drive and the vibration exciter are actuated separately from one another.

This way, a further screening section is provided before the screening unit, which in the first place effectively increases the total available screening surface. This increases the residence time of the filler material in the screening zone, which results in a better screening. The different excitation of the coarse screen section and the further screening section results in a significantly higher effectiveness of the screening process and in a lower load on the downstream process units. In particular, the different stimuli can be selected such that they produce an optimum screening action in accordance with the respective filling material.

In the present invention, any type of unit can be used as the coarse screening section or the further screening section, by means of which a screening action can be achieved. Correspondingly, roller screens, wire mesh troughs, etc., can also be used for this purpose, among others.

According to a preferred variant of the invention, a transport section, in particular a delivery chute, of the delivery unit is arranged in the conveying direction before the other screening section, and the transport section can be vibrated independently of the coarse screening section, preferably independently of the vibration exciter. Accordingly, the transport section and the coarse screen can be optimally set to the task that needs to be filled by the structural unit. The vibration of the transport section can be designed to achieve an optimum transport action and to distribute the delivered material uniformly. Accordingly, the vibration of the coarse screen section is designed for optimal screening.

In order to reduce the component and assembly effort, it can be provided, in particular, that the delivery unit and the further screening section form a structural unit which is connected to the vibration exciter and is driven by the vibration exciter to generate the vibratory movement. Accordingly, the delivery unit and the further sifting section can be driven by a common vibration exciter. In addition, the components can now be combined to form a compact structural unit.

According to a variant of the invention, the vibration drive and the vibration exciter can be actuated by the control device in such a way that the coarse screen and the further screen and/or the coarse screen and the transport section of the transfer unit each execute a vibration movement, wherein the vibration movement of the coarse screen and the vibration movement of the further coarse screen or the vibration movement of the coarse screen and the vibration movement of the transport section differ in terms of the excitation pattern, the excitation intensity, the excitation direction and/or the excitation frequency. This enables the coarse screen section and the transport section, or the coarse screen section and the further screening section, respectively, to be set appropriately for the screening task at hand.

The pretreatment device according to the invention can be designed such that the further sifting section is driven by means of a linear vibrator for linear or substantially linear oscillation of the further sifting section in the conveying direction. In this way, the vibration of the secondary conveying action is set by means of the optionally coupled transport section of the further sifting section and the transfer unit. Thereby may assist or cause the transport of the filling material towards the coarse screen.

In the invention it is also conceivable that the coarse screen section is driven by a circular vibrator for circular or rotational vibration of the coarse screen section and that the screening surface of the coarse screen section extends obliquely in the conveying direction, wherein preferably the screening surface of the coarse screen section makes an angle with the horizontal in the range between 6 ° and 10 °. Circular or rotary oscillation allows the screening action in the region of the coarse screen section to be optimized. In order to be able to carry away the filler material remaining on the coarse screen section in a simple manner, the screen surface of the coarse screen section is inclined relative to the horizontal according to the present instructions. The above-given angular range has proven to be advantageous here in particular when applied in rock breaking installations.

According to a possible variant of the invention, the pretreatment device can be designed such that the delivery unit has a delivery section with a bottom, in particular a part of the delivery chute, wherein the bottom merges into the screening surface of the further screening section such that the further screening section is replaceably coupled to the mechanical port of the delivery unit by means of the fixing section and the port can be equipped for accommodating the closed bottom instead of the further screening section. In this way, the preprocessing device can be adapted to the desired application purpose in the form of an installation package to the current task. If filler material is delivered that requires a tight screening action to relieve the load on subsequent process units, another screening section may be incorporated. But instead of another screening section a closed bottom is fitted if there is a filling material that can be screened sufficiently only by using a coarse screening section. It is also conceivable to use a plurality of other sifting sections with different sifting action, so that the pretreatment device can be further adjusted.

In order to reduce the component and installation outlay, the delivery unit can have side walls which delimit the conveying trough laterally and in the conveying direction and which extend at least partially in the conveying direction laterally of the other sieve section, so that a continuous transport area is defined. This also makes possible a compact design.

The design according to the invention makes it possible for the further screening section to have a free end facing the coarse screening section, the coarse screening section having a delivery area facing the free end of the further screening section, the delivery area being arranged downwards in the direction of gravity with a step formed relative to the free end of the further screening section, and the height of the step preferably being at least 50mm, particularly preferably being selected in the range between 50mm and 500 mm. In this way, the filling material is rolled during the transition from the further screen section to the coarse screen section and thus the screening action is again improved.

A conceivable variant of the invention provides that a discharge element is arranged in the direction of gravity below the further screen section, by means of which the sub-components screened by the further screen section can be transported, the discharge element preferably being moved in a vibratory motion together with the further screen section by means of a vibratory exciter, the discharge element preferably being configured as a chute, for example, made of rubber material. The screened-out portion of the filling material can be reliably transported away from the working area of the other screening section via the discharge element. In particular, damage to the mechanical function by dirt is thereby avoided. Since the discharge element can be subjected to a vibratory movement jointly with the further screen section, the transport movement caused by the vibratory movement can also be used for transport to the discharge element. Because a common vibration exciter is used, the component costs are reduced. Furthermore, the discharge element does not need to have a particularly large inclined portion to assist the transport action, so that a small structural height can be achieved. A simple construction is achieved when using a runner made of rubber material as the discharge element.

A further embodiment of the invention can provide that an additional screening cover is arranged below the coarse screen section, in particular below the upper cover screening washer of the coarse screen section, to which screening cover the components screened off by the coarse screen section (upper cover) are at least partially conveyed, and that a transport section for discharging the material screened off by the additional screening cover is arranged below the additional screening cover. By means of the additional screening cover, a further sub-fraction of the fine particles can be screened out of the already screened-out material, which can also be discharged separately from the working area of the machine.

In the present invention it is possible to have the discharge element extend under the further screening section and the coarse screening section. In this way, the material sifted out by the two sifting sections can be jointly removed via a single discharge element.

Alternatively, it is also possible for the discharge element to have an end section which is guided to the screening lower cover, so that material screened by the other screening section is guided onto the screening area of the screening lower cover. The material screened off by the further screening section is then subjected to a further screening process on the screening lower cover, in order here also to screen off fine-grained sub-components.

According to a particularly preferred variant of the invention, the coarse screen can have, at its end facing away from the further screen, a discharge region which leads to a crushing device of the crushing plant, wherein the crushing device preferably has a stationary crusher jaw plate and, opposite thereto, a movable crusher jaw plate, and a crusher pulling belt or another suitable means for carrying away the material crushed by the crushing device is arranged below the crushing device.

In order to prevent damage to the further screen section when feeding the delivery unit, the delivery unit and the further screen section may jointly form a transport area, wherein the further screen section preferably closes the transport area in the transport direction and the further screen section covers half, particularly preferably only one third, of the length of the transport area in the transport direction to the greatest extent in the transport direction. In this case, it is prevented that the majority of the filling material reaches directly onto the screening area during the supply. This is achieved in a simple manner by protecting the other sifting portion against high loads.

Drawings

The invention will be explained in more detail below on the basis of embodiments shown in the drawings. In which is shown:

figure 1 shows a side view of a movable crushing plant in a schematic principle drawing,

FIG. 2 shows a detailed schematic of FIG. 1, an

Fig. 3 shows a perspective view and a sectional view of a detail according to fig. 2.

Detailed Description

Fig. 1 shows a pretreatment device (Aufbereitungsanlage), i.e. a mobile crushing device 10, which is generally used for crushing rock material or other mineral material. The mobile crushing plant 10 has a machine frame which is supported by two travelling mechanisms 11 which are designed as chain conveyors.

The crushing plant 10 is equipped with a delivery unit 20, which is typically implemented as a funnel-shaped delivery unit having two funnel side walls 21 and one funnel rear wall 22. Via the delivery unit 20 the crushing plant 10 can be filled with material to be crushed. The delivery unit 20 has a conveying device at the bottom. The material to be crushed is conveyed to the sieving unit 30 via the conveying means. The screening unit 30 is assigned a vibration exciter 38, which may be embodied as an eccentric wheel drive. The screening unit 30 can be vibrated by means of the vibration exciter 38 in order to subject the conveyed material to the screening process. The vibration exciter 38 not only vibrates the screening unit 30 for screening, but also, in combination with a corresponding combination of one or more screening caps, performs the transport function, as in a vibrating conveyor.

As can be seen from fig. 1, the unscreened coarse rock fraction is transported from the screening unit 30 to the crushing device 40. The crushing device 40 is embodied here in the form of a jaw crusher. The crushing device 40 has two

crusher jaw plates

42, 43, which form a converging gap. The material to be comminuted is conveyed into the gap region. The crushing device 40 has a stationary crusher jaw plate 42 and a movable crusher jaw plate 43. The movable crusher jaw 43 is driven by an eccentric wheel drive 41.

As can be seen in fig. 1, coarse rock material is broken up in the converging gap. The crushed and crushed rock material leaves the crushing device 40 at the bottom side and falls by gravity onto the crusher pulling belt 60. The crusher pulling belt 60 can be designed here as an endless circulating conveyor belt.

The crushed rock material is guided away via the crusher pulling belt 60 and is piled beside the crushing plant 10.

In the region of the crusher pulling belt 60, a magnetic separator 61 is provided on the crushing plant 10. The magnetic separator is arranged above the material flow, which is guided on the crusher pulling belt 60. The metal portion of the material stream is magnetically attracted from the magnetic separator 61 and separated from the material stream.

As can be seen in the figures, material from the delivery unit 20 is guided in the sieving unit 30 through a coarse sieve section 32 (e.g. an upper sieving cover). Where a portion of the rock material is screened out. The rock parts are referred to here, which, because of their size, do not need to be transported through the breaking device 40, because they already have a size approximately corresponding to the size of the rock to be broken by the breaking device 40. As can be seen from the drawing, a portion of the screened rock fraction is delivered directly to the breaker draw string 60, to be precise in the bypass past the breaker device 40.

As can be seen from fig. 3, there is now a further screening lower cover 34 in the screening unit 30 below the coarse screening portion 32. The sifting lower cover 34 sifts another fine particle fraction from the material that has been sifted. The sifting cover 34 can be seen in fig. 3, wherein the sifting elements belonging to the sifting cover 34 are not shown for the sake of clarity. The screening elements are mounted on support members 33 of a screening lower cover 34. It is partially desirable here to divide it into particularly fine-grained sub-fractions, for which a side discharge belt 50 is used. The sub-components of the fine particles are delivered onto an endless, circulating side discharge belt 50, transported out of the working area of the crushing plant 10 and deposited, as can be seen in fig. 1.

It is not always desirable to output fine-grained sub-components at this point. But rather the machine driver desires the option of separating the fine-grained sub-fraction or delivering it directly onto the crusher drag belt 60 together with the sifted out coarser material. A movable, oscillating chute 70 is used for this purpose.

As can also be seen in fig. 2 and 3, the screening unit 30 has two screening side walls 31, which are arranged spaced apart from each other. Between the two screening side walls 31 a transport area for rock material is formed. As can be seen from the schematic illustration, at least one of the screening side walls 31 has a receptacle for a vibration exciter 38. The vibration energy of the vibration exciter 38 can thereby be transmitted to the coarse screen section 32. A different arrangement of the vibration exciter 38 is also conceivable, but it should be provided therein that the vibration energy of the vibration exciter 38 is introduced into the screening unit 30, whereby the screening unit 30 (and its coarse screening portion 32 and screening lower cover 34) vibrates with the frequency and amplitude of the vibration exciter 38.

Between the two screening side walls 31, a coarse screen section 32 is held in the upper region of the screening unit 30. A sifting lower cover 34 is disposed below the coarse sifter portion 32. A conveying area is created between the coarse screen section 32 and the screening lower cover 34. Accordingly, the filler material screened out by the coarse screen section 32 can be transported away on the screen elements of the screen lower cover 34. The material carried away reaches directly onto the breaker draw string 60 via the end 37 of the sifter lower cover 34, as shown in fig. 1.

Above the coarse screen section 32, a conveying area is defined by means of two side walls and the coarse screen section 32.

A further transport section 35 is formed under the screening lower cover 34. This transport section 35 can be designed as a flexible component, wherein the transport section extends with its longitudinal extent from the left side of the screening unit 30 up to the displaceable oscillating chute 70. The filler material screened by the screening elements of the screening lower cover 34 can be transported away on the transport section 35. The fine-grained screening material can be conducted away under the end 37, as described above, directly onto the crusher pulling belt 60 or onto the side discharge belt 50 in the respective position of the movable oscillating chute 70.

As can be further seen from fig. 2 and 3, two support sections 39 extend between the two screening side walls 31. The coarse screen portion 32 is fixed to the support section 39. Here, the coarse screen section 32 covers the area between the two screening side walls 31 of the screening unit 30. The coarse screen section 32 has a delivery area 32.1, which transitions into the screening area of the coarse screen section 32. Opposite the delivery area 32.1, the coarse screen 32 has a discharge area 32.2. The reject zone 32.2 is curved at an angle relative to the actual screening surface of the coarse screen section 32. In the ejection area 32.2, a screw receptacle is provided. The coarse screen 32 can be screwed to the corresponding support section 39 by means of the screw receptacles. In the region of the transition region 32.1, further screw receptacles are provided for the fastening of corresponding support sections 39. Furthermore, on the opposite ends of the longitudinal sides of the coarse screen section 32, fixing receptacles are provided, by means of which the coarse screen section 32 can be connected to the respective screening side wall 31.

As can be seen from fig. 1, the ejection region 32.2 opens directly into the crushing region, which is formed between the stationary and movable crushing

jaws

42, 43.

The oscillating drive mechanism 38 is best seen in fig. 3. The vibratory drive mechanism is positioned between the two screening sidewalls 31 under the coarse screen upper cover 32.

As further seen in fig. 2 and 3, the frame of the movable crushing device 10 has a boom 12. The boom 12 carries a delivery unit 20. The delivery unit 20 has two opposite side walls 21 extending in the conveying direction. The delivery unit 20 is closed at the rear side by a rear wall 22. This forms an upwardly open filling funnel which is closed at the bottom side by means of a delivery chute.

The delivery chute has a bottom 23. The bottom 23 may be constituted by one plate member or a plurality of plate members. As can be seen in fig. 3, a further sifting portion 24 is arranged between the two side walls 21 of the filling unit 20. The further sifting portion 24 is preferably flange-free connected to the bottom 23 in the conveying direction. The further sifting portion 24 has a fixing section 24.1 on its end facing the bottom 23. The further screening portion 24 is placed by means of the fixed section 24.1 on a port 26 of the delivery unit 20. The mechanical port 26 may be formed, for example, by a carrier extending transversely to the conveying direction. The further sifting portion 24 can be connected to the port 26 via suitable fasteners, such as screws, which can be disengaged. Next to the fixed section 24.1 in the conveying direction, the further screening section 24 has a screening area. The further sifting portion 24 has a further supporting section of the mechanical port 26 in the region of its free end 24.2 facing away from the fixing section 24.1, so that the further sifting portion 24 can be supported firmly.

The further sifting portion 24 projects with its free end 24.2 in the conveying direction over the delivery area 32.1 in an overlapping manner. Furthermore, the transfer region 32.1 is offset downward in the direction of gravity relative to the free end 24.2, so that a step is formed.

Below the further sifting portion 24 a discharge unit 28 is arranged. The discharge unit 28 is designed as an obliquely arranged chute which can be made of a flexible component, in particular of a rubber material. The discharge element 28 has an end section 28.1. The end section 28.1 is led to the upper side of the screening element (not shown in fig. 3) of the screening lower cover 34.

As can also be seen in fig. 3, the delivery unit 20 has a vibration exciter, for example an eccentric wheel drive. The vibration exciter is used to vibrate the delivery unit 20. On the basis of this vibration, the bottom 23 of the trough and the other sifting portion 24 jointly perform a vibrating movement. Preferably, a linear oscillation is generated, which extends in the conveying direction or substantially in the conveying direction.

The mode of operation is explained below with reference to fig. 3. The filling material to be processed is delivered by means of an excavator onto the bottom 23 of the delivery unit 20. The filling material is moved from the bottom 23 via the further sifting portion 24 in the conveying direction on the basis of the vibrations generated by the vibration exciter 25. In this case, the subcomponents are screened from the packing material in the screening zone of the further screening section 24. The subcomponents arrive at a discharge unit 28. On the basis of the inclined 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 delivery unit 20 such that the delivery unit also vibrates under vibration excitation by the vibration exciter 25. This vibratory motion contributes to the transport action.

The filler material conducted via the further screening portion 24 reaches the coarse screening portion 32 via a step section between the further screening portion 24 and the coarse screening portion 32. The filling material is rolled in this case, which enables a better screening effect to be achieved in the subsequent screening process on the coarse screen section 32. The coarse screen section 32 is preferably rotationally vibrated by a vibratory drive mechanism 38. In this way a good screening effect is achieved. As mentioned above, the transport action is facilitated by the inclination of the coarse screen section 32 with respect to the horizontal. Another sub-component is screened from the filler material at the coarse screening section 32. The screened sub-components fall onto the screening elements of the screening lower cover 34. Here, another screening process is performed as described above.

At this point in time, when filling the filling material into the delivery unit 20, the filling material should undergo a less rigorous screening process, so that the further screening section 24 can be removed. Where the other sifting portion is disengaged from the machine port 26 and removed. The closed bottom may then be secured at the mechanical port 26 in place of another sifting portion 24. The closed bottom now directs the fill material directly onto the coarse screen 32.

According to the invention, a control device is provided. The coarse screen section 32 and the further screen section 24 can be actuated separately from one another by means of a control device by using the vibration drive 38 and the vibration exciter 25. In this way, a significantly better screening effect is achieved.

Claims

1. A pre-treatment apparatus, in particular a mobile crushing apparatus (10), in particular a rock crusher, having a delivery unit (20) which can be filled with material to be crushed,

wherein a screening unit (30) with a coarse screen section (32) is arranged in the conveying direction after the delivery unit (20) or in the delivery unit (20),

wherein the coarse screen part (32) can be moved in an oscillating manner by means of an oscillating drive (38), and

wherein a part of the conveyed material is directed via the screening unit (30) to an immediate process unit, in particular a crushing device (40), and another part is screened out in the screening unit (30),

characterized in that a further sifting section (24) is arranged in the conveying direction upstream of the sifting unit (30), which is driven by a vibration exciter (25), and in that a control device is provided, by means of which the vibration drive (38) and the vibration exciter (25) are actuated separately from one another.

2. The pretreatment apparatus according to claim 1, characterized in that a transport section, in particular a delivery chute, of the filling unit (20) is arranged in the conveying direction before the further sifting section (24) and can be vibrated independently of the coarse sifter section (32), preferably independently of the vibration exciter (25).

3. The pretreatment apparatus according to claim 1 or 2, wherein the filling unit (20) and the further sifting section (24) form one structural unit which is connected to the vibration exciter (25) and is driven by the vibration exciter to produce a vibratory movement.

4. A pretreatment apparatus according to any one of claims 1 to 3, characterized in that the vibration drive mechanism (38) and the vibration exciter (25) are operated by the control device such that the coarse screen section (32) and the further screening section (24) and/or the coarse screen section (32) and the transport section of the filling unit (20) respectively execute a vibrating movement, wherein the vibrating movement of the coarse screen section (32) and the vibrating movement of the further coarse screen section (24) or the vibrating movement of the coarse screen section (32) and the vibrating movement of the transport section differ in terms of excitation form, excitation strength, excitation direction and/or excitation frequency.

5. A pre-treatment plant according to any one of claims 1 to 4, characterised in that the further sieving section (24) is driven by a linear vibrator for subjecting the further sieving section (24) to linear or substantially linear vibrations in the conveying direction.

6. The pretreatment apparatus according to any one of claims 1 to 5, characterized in that the coarse screen section (32) is driven by a circular vibrator to cause the coarse screen section (32) to perform circular or rotational vibrations and to extend the screening surface of the coarse screen section (32) obliquely towards the conveying direction, wherein preferably the screening surface of the coarse screen section (32) makes an angle with the horizontal in the range between 6 ° and 10 °.

7. The pretreatment apparatus according to any one of claims 1 to 6, characterized in that the filling unit (20) has a delivery section comprising a bottom (23), in particular a part of a delivery chute, wherein the bottom (23) transitions into a sifting surface of the further sifting section (24), the further sifting section (24) being replaceably coupled to a mechanical port (26) of the filling unit (20) by means of a fixing section (24.1), and the port (26) being equipped instead of the further sifting section (24) for accommodating a closed bottom.

8. A pretreatment device according to any one of claims 1 to 7, characterized in that the filling unit (20) has side walls (21) which define a conveying trough at the side and in the conveying direction, and that the side walls (21) extend at least partially in the conveying direction at the side of the further sieve section (24) so as to define a continuous transport area.

9. The pretreatment apparatus according to any one of claims 1 to 8, characterized in that the further sieve section (24) has a free end (24.2) facing the coarse sieve section (32), the coarse sieve section (32) having a delivery area (32.1) facing the free end (24.2) of the further sieve section (24), the delivery area (32.1) being arranged downwards in the direction of gravity with a step formed with respect to the free end (24.1) of the further sieve section (24), and preferably the height of the step is at least 50mm, particularly preferably selected in a range between 50mm and 500 mm.

10. The pretreatment apparatus according to any one of claims 1 to 9, characterized in that a discharge element (28) is arranged in the direction of gravity below the further sifting section (24), by means of which the sub-components sifted by the further sifting section (24) can be transported away, the discharge element (28) preferably being in a vibrating movement together with the further sifting section (24) by means of the vibration exciter (25), the discharge element (28) preferably being configured as a chute, for example composed of rubber material.

11. The pretreatment apparatus according to any one of claims 1 to 10, characterized in that a sifting lower cover (34) is arranged below the coarse sifter section (32), to which the components sifted out by the coarse sifter section (32) are at least partially conveyed, and a transport section (35) for discharging the material sifted out by the sifting lower cover (34) is arranged below the sifting lower cover (34).

12. The pretreatment apparatus according to any one of claims 1 to 11, characterized in that the discharge element (28) extends below the further screening section (24) and the coarse screening section (32), or the discharge element (28) has an end section (28.1) which is directed to the screening lower cover (34) so that material screened by the further screening section (34) is directed onto a screening area of the screening lower cover (34).

13. The pretreatment apparatus according to any one of claims 1 to 12, characterized in that the coarse screen section (32) has, at its end facing away from the further screen section (24), a throw-out region (32.2) which leads to a crushing device (40) of the crushing apparatus, wherein the crushing device (40) preferably has a stationary crusher jaw (42) and, opposite thereto, a movable crusher jaw (43), and a crusher pulling belt (60) or another suitable means for carrying away material crushed by the crushing device (40) is arranged below the crushing device (40).

14. The pretreatment apparatus according to any one of claims 1 to 13, characterized in that the filling unit (20) and the further sifting section (24) jointly form a transport area, wherein the further sifting section (24) preferably closes off the transport area in a transport direction and the further sifting section (24) covers maximally half, particularly preferably maximally only one third, of the length of the transport area in the transport direction.