Rotary kiln discharging bin for mixing and screening

Abstract

The utility model discloses a rotary kiln blanking bin for mixing and screening, which is connected to a rotary kiln body, the rotary kiln body is provided with a discharge port, the rotary kiln blanking bin comprises a discharge bin and a screening assembly, the discharge bin is connected to the rotary kiln body and is provided with a first bin and a second bin which are communicated with each other, and the screening assembly comprises a screening cylinder and a plurality of adjusting pieces. The screening cylinder is rotationally arranged in the first stock bin and provided with a feeding end and a discharging end, the feeding end of the screening cylinder is communicated with the discharging port, the discharging end of the screening cylinder is communicated with the interior of the second stock bin, a plurality of screening gaps are evenly formed in the circumferential side wall of the screening cylinder, and the adjusting parts are detachably arranged in the screening gaps and used for adjusting the sizes of the screening gaps. The utility model can effectively solve the problem that the size of particles of screened materials cannot be selected according to production requirements due to the fact that the distance between every two adjacent screening columns is fixed and cannot be adjusted, so that the use is inconvenient.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a rotary kiln lower bin for mixing and screening. Background Art

[0002] Continuous rotary kiln is a common equipment in the lithium battery industry.

[0003] For example, the Chinese utility model patent application number CN202022164320.4 is titled: "A screening device for a rotary kiln and a rotary kiln, comprising a screening mechanism and a discharge bin, the screening mechanism being mounted within the discharge bin, the discharge bin being supported by a rotary kiln frame; the discharge bin comprising a first discharge bin and a second discharge bin, the first discharge bin having a first discharge port at its bottom, the second discharge bin having a second discharge port at its bottom, the sidewalls of the first discharge bin being aligned with the sidewalls of the second discharge bin; the screening mechanism comprising a mounting plate, a fixed plate, and a plurality of screening columns, the mounting plate being fixed to the discharge end of the rotary kiln furnace tube, the fixed plate being located on the aligned sidewalls of the first and second discharge bins, the mounting plate having a first opening, the fixed plate having a second opening; the mounting plate and the fixed plate being connected by screening columns, the screening columns being spaced apart." This device has the advantage of being able to screen materials of different volumes. However, since the distance between two adjacent screening columns is fixed and cannot be adjusted, it is impossible to select the particle size of the screening material according to production needs.

[0004] Therefore, there is an urgent need for a rotary kiln lower hopper for mixed screening to solve the problem in the prior art that the spacing between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to select the particle size of the screening material according to production needs, thereby causing inconvenience in use. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and propose a rotary kiln lower hopper for mixed screening, so as to solve the technical problem in the prior art that the spacing between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to selectively screen the particle size of the material according to production needs, thereby causing inconvenience in use.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a rotary kiln lower hopper for mixing and screening, which is connected to the rotary kiln body. The rotary kiln body is provided with a discharge port, including:

[0008] A discharge bin is connected to the rotary kiln body and has two interconnected first and second bins; and

[0009] The screening assembly includes a screening drum and multiple adjusting parts. The screening drum is rotatably built into the first silo and has a feed end and a discharge end. The feed end of the screening drum is connected to the discharge port, and the discharge end of the screening drum is connected to the interior of the second silo. The circumferential side wall of the screening drum is evenly provided with multiple screening gaps. The adjusting parts are detachable and built into the screening gaps to adjust the size of the screening gaps.

[0010] In some embodiments, the screening drum includes two support rings and multiple screening rods, the two support rings are parallel to each other and arranged at intervals, the multiple screening rods are evenly arranged between the two support rings along the circumferential direction of the support rings, and the two ends of the screening rods are respectively connected to the two support rings, and the screening gap is formed between two adjacent screening rods.

[0011] In some embodiments, the screening drum further includes a connecting flange, a frame and a plurality of fastening connection parts. The connecting flange is connected to the discharge end of the rotary kiln body and is provided with a plurality of first threaded holes. The plurality of first threaded holes are evenly distributed along the circumferential direction of the connecting flange. The frame is annular and is fixedly mounted on the feed end of the screening drum. The frame is provided with a connecting hole relative to the first threaded hole. The fastening connection part is arranged in a one-to-one correspondence with the connecting hole. The threaded end of the fastening connection part passes through the connecting hole and is threadedly connected to the first threaded hole, and the large diameter end of the fastening connection part abuts against the frame.

[0012] In some embodiments, one of the support rings is provided with a plurality of plug-in holes, and the plug-in holes are arranged between two adjacent screening rods, and the other support ring is provided with a through hole relative to the plug-in hole, and the other support ring is arranged away from the discharge port relative to the one support ring, and the adjusting member includes an adjusting rod, one end of the adjusting rod passes through the through hole and is inserted into the plug-in hole, and the other end of the adjusting rod is clamped with the other support ring.

[0013] In some embodiments, the screening assembly also includes at least two clips and a connecting ring, at least two clips are arranged at intervals along the circumferential direction of the other support ring, and are all connected to the other support ring, the connecting ring is connected to the other ends of the multiple adjusting rods, and can be clipped with at least two clips, so that the multiple screening rods and the connecting ring can be detachably connected to the other support ring.

[0014] In some embodiments, the clamping part includes a clamping portion and an elastic connecting portion, the clamping portion is spaced apart from the other support ring, one end of the elastic connecting portion is connected to the other support ring, and the other end is connected to the clamping portion, for pushing the clamping portion to clamp with the connecting portion.

[0015] In some embodiments, the cross-sectional area of ​​the clamping portion gradually increases in a direction approaching the elastic connecting portion.

[0016] In some embodiments, the cross-sectional area of ​​the adjusting rod is less than or equal to the cross-sectional area of ​​the screening rod.

[0017] In some embodiments, the connecting ring is provided with a second threaded hole relative to the through hole, and the adjusting member further includes a connecting screw, which is arranged in a one-to-one correspondence with the second threaded hole, and one end of the connecting screw is connected to the other end of the adjusting rod, and the other end is threadedly connected to the second threaded hole.

[0018] In some embodiments, the interior of the discharge bin is hollow, and the lower bin of the rotary kiln for mixing and screening also includes a partition, which is connected to the inner wall of the discharge bin and divides the interior of the discharge bin into a first bin and a second bin that are interconnected. The interior of one support ring is connected to the discharge port, and the interior of another support ring is connected to the interior of the second bin, and multiple screening gaps are connected to the interior of the first bin; a first discharge hole is also provided at the bottom of the first bin, and the opening of the first discharge hole is funnel-shaped; a second discharge hole is also provided at the bottom of the second bin, and the opening of the second discharge hole is funnel-shaped.

[0019] Compared with the prior art, the beneficial effects of the lower hopper of the rotary kiln for mixed screening provided by the present invention include: a first hopper and a second hopper are interconnected in the discharge hopper, a screening drum is rotatably built into the first hopper, the feed end of the screening drum is connected to the discharge port, the discharge end of the screening drum is connected to the interior of the second hopper, and a plurality of screening gaps are evenly opened on the circumferential side wall of the screening drum, the plurality of screening gaps are all connected to the interior of the first hopper, an adjusting member is built into the screening gap and is detachably connected to the screening drum for adjusting the size of the screening gap. Compared with the prior art, the screening gap can separate small particles into the first hopper and large particles into the second hopper through the screening gap, and the size of the screening gap can be adjusted by detachably connecting the adjusting rod to the screening gap, so that the particle size of the screening material can be selected according to production needs to meet different production needs, which can solve the problem in the prior art that the spacing between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to select the particle size of the screening material according to production needs, thereby causing inconvenience in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a rotary kiln lower bin for mixed screening connected to a rotary kiln body provided by an embodiment of the present utility model;

[0021] Figure 2This is a three-dimensional structural diagram of a rotary kiln lower hopper for mixing and screening provided by an embodiment of the present invention, which is connected to a rotary kiln body;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the screening drum and the clamping member provided by the embodiment of the utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the connection between the screening drum and the clamping member provided by the embodiment of the utility model from another perspective;

[0024] Figure 5 This is a schematic diagram of a three-dimensional structure of an adjusting rod and a connecting ring provided by an embodiment of the present utility model;

[0025] Figure 6 It is a schematic cross-sectional view of the structure in which the adjusting rod, the connecting screw and the connecting ring are connected, provided by an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] Rotary kiln body 1;

[0028] Discharge bin 2;

[0029] First silo 21;

[0030] Second silo 22;

[0031] Screening component 3;

[0032] Screening drum 31;

[0033] Screening gap 311;

[0034] Support ring 312;

[0035] screening rod 313;

[0036] Connecting flange 314;

[0037] border 315;

[0038] Fastening connection portion 316;

[0039] Adjustment member 32;

[0040] Adjustment rod 321;

[0041] Connecting screw 322;

[0042] Snap-on member 33;

[0043] a clamping portion 331;

[0044] elastic connecting portion 332;

[0045] Connecting ring 34;

[0046] Partition 4. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] In order to solve the technical problem that the distance between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to select the particle size of the screening material according to production needs, thereby causing inconvenience in use, the utility model provides a rotary kiln lower hopper for mixed screening, which can adjust the size of the screening gap 311 by detachably connecting the adjusting rod 321 to the screening gap 311, so that the particle size of the screening material can be selected according to production needs to meet different production needs.

[0049] It should be noted that the lower hopper of the rotary kiln for mixing and screening described in the present invention is used for but not limited to the field of rotary kiln technology, etc. For the convenience of explanation, in the present invention, only the application of the lower hopper of the rotary kiln for mixing and screening in the field of rotary kiln technology is used as an example for explanation, and the principle of applying the lower hopper of the rotary kiln for mixing and screening to other types of equipment is essentially the same as the principle applied to the field of rotary kiln technology, which will not be repeated here.

[0050] See also Figures 1 to 4 , Figure 1 This is a structural schematic diagram of a rotary kiln lower hopper for mixed screening in an embodiment of the present invention. The rotary kiln lower hopper for mixed screening is connected to the rotary kiln body 1. The rotary kiln body 1 is provided with a discharge port, including: a discharge hopper 2 and a screening assembly 3. The discharge hopper 2 is connected to the rotary kiln body 1 and has two mutually connected first hoppers 21 and second hoppers 22. The screening assembly 3 includes a screening drum 31 and a plurality of adjusting parts 32. The screening drum 31 is rotatably built into the first hopper 21 and has a feed end and a discharge end. The feed end of the screening drum 31 is connected to the discharge port, and the discharge end of the screening drum 31 is connected to the interior of the second hopper 22. The circumferential side wall of the screening drum 31 is evenly provided with a plurality of screening gaps 311. The adjusting parts 32 are detachable and built into the screening gaps 311 for adjusting the size of the screening gaps 311.

[0051] In this device, the discharge silo 2 has a first silo 21 and a second silo 22 which are connected to each other, and the screening drum 31 is rotatably built into the first silo 21, the feed end of the screening drum 31 is connected to the discharge port, and the discharge end of the screening drum 31 is connected to the interior of the second silo 22, and a plurality of screening gaps 311 are evenly opened on the circumferential side wall of the screening drum 31, and the plurality of screening gaps 311 are all connected to the interior of the first silo 21, and the adjusting part 32 is built into the screening gap 311 and is detachably connected to the screening drum 31 for adjusting the size of the screening gap 311.

[0052] Compared with the existing technology, the screening gap 311 can be used to separate materials with small particles into the first silo 21, and materials with large particles can be separated into the second silo 22. At the same time, by detachably connecting the adjusting rod 321 to the screening gap 311, the size of the screening gap 311 can be adjusted, so that the particle size of the screening material can be selected according to production needs to meet different production needs. It can solve the problem in the existing technology that the spacing between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to select the particle size of the screening material according to production needs, thereby causing inconvenience in use.

[0053] Specifically, the screening drum 31 is connected to the end of the rotary kiln body 1 and rotates with the rotary kiln body 1. During the rotation, small particles of material pass through the screening gap 311 and are separated from the screening drum 31 and fall into the first silo 21. Large particles of material slide along the length direction of the screening drum 31 and slide into the second silo 22. The rotary kiln body 1 here belongs to a conventional setting well known to those skilled in the art and will not be described in detail here.

[0054] In this embodiment, Figures 2 to 4 As shown, the screening drum 31 includes two support rings 312 and a plurality of screening rods 313 , a connecting flange 314 , a frame 315 and a plurality of fastening connection parts 316 .

[0055] Among them, the two support rings 312 are parallel to each other and arranged at intervals, and multiple screening rods 313 are evenly arranged between the two support rings 312 along the circumferential direction of the support ring 312, and the two ends of the screening rod 313 are respectively connected to the two support rings 312, and a screening gap 311 is formed between the two adjacent screening rods 313.

[0056] Two support rings 312 are respectively arranged at the two ends of multiple screening rods 313, thereby forming the structure of the screening drum 31. Small particles of material pass through the screening gap 311, are separated from the screening drum 31, and fall into the first silo 21. Large particles of material slide along the length direction of the screening drum 31 and slide into the second silo 22.

[0057] As an implementation method, Figures 2 to 4As shown, the connecting flange 314 is connected to the discharge end of the rotary kiln body 1 and is provided with a plurality of first threaded holes, which are evenly distributed along the circumferential direction of the connecting flange 314. The frame 315 is annular and is fixedly sleeved on the feed end of the screening drum 31. The frame 315 is provided with a connecting hole relative to the first threaded hole. The fastening connection part 316 is arranged in a one-to-one correspondence with the connecting hole. The threaded end of the fastening connection part 316 passes through the connecting hole and is threadedly connected to the first threaded hole, and the large diameter end of the fastening connection part 316 abuts against the frame 315.

[0058] A detachable connection structure with threaded connection is formed by connecting flange 314, frame 315 and multiple fastening connection parts 316. The fastening connection parts 316 here are bolts and screws that are common and easy to purchase on the market. This is a conventional setting known to technicians in this field and will not be described in detail.

[0059] As an implementation method, Figures 2 to 5 As shown, a support ring 312 is provided with a plurality of plug-in holes, and the plug-in holes are arranged between two adjacent screening rods 313, and another support ring 312 is provided with a through hole relative to the plug-in hole, and the other support ring 312 is arranged away from the discharge port relative to the one support ring 312, and the adjusting member 32 includes an adjusting rod 321, one end of the adjusting rod 321 passes through the through hole and is inserted into the plug-in hole, and the other end of the adjusting rod 321 is clamped with the other support ring 312.

[0060] The plug-in hole is arranged between two adjacent screening rods 313 , and the plug-in hole cooperates with the through hole to be arranged for the sliding of the adjustment rod 321 to play a connecting and guiding role.

[0061] Furthermore, the adjusting rod 321 can be engaged with another supporting ring 312 , thereby achieving a detachable connection between the adjusting rod 321 and the screening drum 31 .

[0062] As an implementation method, Figures 2 to 4 As shown, the screening assembly 3 also includes at least two clips 33 and a connecting ring 34. The at least two clips 33 are arranged at intervals along the circumferential direction of another support ring 312 and are all connected to the other support ring 312. The connecting ring 34 is connected to the other ends of multiple adjustment rods 321 and can be clipped with at least two clips 33, so that the multiple screening rods 313 and the connecting ring 34 can be detachably connected to the other support ring 312.

[0063] The plurality of adjusting rods 321 are connected to form a whole through the connecting ring 34 , and at least two clamping members 33 are engaged with the connecting ring 34 , so that the plurality of adjusting rods 321 can be detachably built into the screening gap 311 .

[0064] In one embodiment, see Figure 2The clamping member 33 includes a clamping portion 331 and an elastic connecting portion 332. The clamping portion 331 is spaced apart from the other support ring 312. One end of the elastic connecting portion 332 is connected to the other support ring 312, and the other end is connected to the clamping portion 331, which is used to push the clamping portion 331 to clamp with the connecting portion.

[0065] The clamping portion 331 is connected to the other support ring 312 through the elastic connecting portion 332. The connecting ring 34 slides along the axis of the other support ring 312 close to the other support ring 312 and can push the clamping portion 331 away. When the connecting ring 34 abuts against the other support ring 312, the elastic restoring force generated by the elastic connecting portion 332 pushes the clamping portion 331 to automatically reset and clamps the connecting ring 34.

[0066] Furthermore, the elastic connection part 332 here is an elastic block or soft plastic that is commonly available and easy to purchase on the market. This is a conventional setting well known to those skilled in the art and will not be described in detail.

[0067] As an implementation method, Figure 4 As shown, the cross-sectional area of ​​the clamping portion 331 gradually increases in a direction approaching the elastic connecting portion 332 .

[0068] The surface of the clamping portion 331 is formed with a wedge-shaped surface, which facilitates the deformation of the elastic connecting portion 332 and the clamping portion 331 when the connecting ring 34 slides close to the other supporting ring 312, thereby facilitating the installation and use of the device.

[0069] As an embodiment, the cross-sectional area of ​​the adjusting rod 321 is smaller than or equal to the cross-sectional area of ​​the screening rod 313 .

[0070] The user can select an adjustment rod 321 with a cross-sectional area smaller than or equal to the cross-sectional area of ​​the screening rod 313 according to production requirements, thereby adjusting the size of the screening gap 311 to meet the needs of different production scenarios.

[0071] In this embodiment, Figure 5 、 Figure 6 As shown, the connecting ring 34 is provided with a second threaded hole relative to the through hole, and the adjusting member 32 also includes a connecting screw 322, which is arranged in a one-to-one correspondence with the second threaded hole, and one end of the connecting screw 322 is connected to the other end of the adjusting rod 321, and the other end is threadedly connected to the second threaded hole.

[0072] The adjusting rod 321 is detachably connected to the connecting ring 34 by a threaded connection, which can also be replaced by a snap connection, and will not be described in detail here.

[0073] In this device, if Figure 1As shown, the interior of the discharge bin 2 is hollow, and the lower bin of the rotary kiln for mixing and screening also includes a partition 4, which is connected to the inner wall of the discharge bin 2 and divides the interior of the discharge bin 2 into a first bin 21 and a second bin 22 that are interconnected. The interior of a support ring 312 is connected to the discharge port, and the interior of the other support ring 312 is connected to the interior of the second bin 22. A plurality of screening gaps 311 are connected to the interior of the first bin 21; a first discharge hole is further provided at the bottom of the first bin 21, and the opening of the first discharge hole is funnel-shaped; a second discharge hole is further provided at the bottom of the second bin 22, and the opening of the second discharge hole is funnel-shaped.

[0074] The interior of the discharge bin 2 is divided into a first bin 21 and a second bin 22 which are interconnected by a partition 4. Funnel-shaped discharge ports are formed at the bottom of the first bin 21 and the second bin 22 respectively to facilitate discharge.

[0075] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the utility model is described in detail:

[0076] The discharge silo 2 comprises a first silo 21 and a second silo 22 which are interconnected. A screening drum 31 is rotatably built into the first silo 21. The feed end of the screening drum 31 is connected to the discharge port, and the discharge end of the screening drum 31 is connected to the interior of the second silo 22. A plurality of screening gaps 311 are evenly formed on the circumferential sidewalls of the screening drum 31. The plurality of screening gaps 311 are all connected to the interior of the first silo 21. An adjusting member 32 is built into the screening gaps 311 and is detachably connected to the screening drum 31 for adjusting the size of the screening gaps 311. Compared to the prior art, the screening gaps 311 can separate materials with small particles into the first silo 21 and materials with large particles into the second silo 22. At the same time, by detachably connecting the adjusting rod 321 to the screening gap 311, the size of the screening gap 311 can be adjusted, thereby enabling the particle size of the screened material to be selected according to production needs to meet different production requirements.

[0077] The specific working process of the present invention is that when in use, the material inside the rotary kiln body 1 is transported to the screening drum 31 formed by two support rings 312 and multiple screening rods 313 as it rotates. During the rotation process, small particles of material pass through the screening gap 311, and are separated from the screening drum 31 and fall into the first silo 21. Large particles of material slide along the length direction of the screening drum 31 and slide into the second silo 22. Small particles of material are discharged from the bottom of the first silo 21, and large particles of material are discharged from the bottom of the second silo 22.

[0078] The lock member 312 is unlocked when the locking cam 331 is unlocked, and the lock member 312 is unlocked when the locking cam 331 is unlocked.

[0079] The device, through the above structure, can solve the problem in the prior art that the distance between two adjacent screening columns is fixed and cannot be adjusted, making it impossible to select the particle size of the screening material according to production needs, thereby causing inconvenience in use.

[0080] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A rotary kiln lower hopper for mixing and screening, connected to a rotary kiln body, wherein the rotary kiln body is provided with a discharge port, characterized in that: include: A discharge bin is connected to the rotary kiln body and has two interconnected first and second bins; as well as The screening assembly includes a screening drum and multiple adjusting parts. The screening drum is rotatably built into the first silo and has a feed end and a discharge end. The feed end of the screening drum is connected to the discharge port, and the discharge end of the screening drum is connected to the interior of the second silo. The circumferential side wall of the screening drum is evenly provided with multiple screening gaps. The adjusting parts are detachable and built into the screening gaps to adjust the size of the screening gaps.

2. The lower hopper of the rotary kiln for mixing and screening according to claim 1, characterized in that: The screening drum includes two support rings and multiple screening rods. The two support rings are parallel to each other and arranged at intervals. The multiple screening rods are evenly arranged between the two support rings along the circumferential direction of the support rings, and the two ends of the screening rods are respectively connected to the two support rings. The screening gap is formed between two adjacent screening rods.

3. The lower hopper of the rotary kiln for mixing and screening according to claim 2, characterized in that: The screening drum also includes a connecting flange, a frame and a plurality of fastening connection parts. The connecting flange is connected to the discharge end of the rotary kiln body and is provided with a plurality of first threaded holes. The plurality of first threaded holes are evenly distributed along the circumferential direction of the connecting flange. The frame is annular and is fixedly sleeved on the feed end of the screening drum. The frame is provided with a connecting hole relative to the first threaded hole. The fastening connection parts are arranged in a one-to-one correspondence with the connecting holes. The threaded end of the fastening connection part passes through the connecting hole and is threadedly connected to the first threaded hole, and the large-diameter end of the fastening connection part abuts against the frame.

4. The lower hopper of the rotary kiln for mixing and screening according to claim 3, characterized in that: One of the support rings is provided with a plurality of plug-in holes, and the plug-in holes are arranged between two adjacent screening rods. The other support ring is provided with a through hole relative to the plug-in hole, and the other support ring is arranged away from the discharge port relative to the one support ring. The adjusting member includes an adjusting rod, one end of the adjusting rod passes through the through hole and is inserted into the plug-in hole, and the other end of the adjusting rod is clamped with the other support ring.

5. The lower hopper of the rotary kiln for mixing and screening according to claim 4, characterized in that: The screening assembly also includes at least two clips and a connecting ring. The at least two clips are arranged at intervals along the circumferential direction of the other support ring and are all connected to the other support ring. The connecting ring is connected to the other ends of the multiple adjusting rods and can be clipped with at least two clips, so that the multiple screening rods and the connecting ring can be detachably connected to the other support ring.

6. The lower hopper of the rotary kiln for mixing and screening according to claim 5, characterized in that: The clamping part includes a clamping portion and an elastic connecting portion. The clamping portion is spaced apart from the other supporting ring. One end of the elastic connecting portion is connected to the other supporting ring and the other end is connected to the clamping portion, and is used to push the clamping portion to clamp with the connecting portion.

7. The lower hopper of the rotary kiln for mixing and screening according to claim 6, characterized in that: The cross-sectional area of ​​the clamping portion gradually increases in a direction approaching the elastic connecting portion.

8. The lower hopper of the rotary kiln for mixing and screening according to claim 7, characterized in that: The cross-sectional area of ​​the adjusting rod is smaller than or equal to the cross-sectional area of ​​the screening rod.

9. The lower hopper of the rotary kiln for mixing and screening according to claim 8, characterized in that: The connecting ring is provided with a second threaded hole relative to the through hole, and the adjusting member further includes a connecting screw, which is arranged in a one-to-one correspondence with the second threaded hole, and one end of the connecting screw is connected to the other end of the adjusting rod, and the other end is threadedly connected to the second threaded hole.

10. The lower hopper of the rotary kiln for mixing and screening according to claim 9, characterized in that: The interior of the discharge bin is hollow, and the lower bin of the rotary kiln for mixing and screening also includes a partition, which is connected to the inner wall of the discharge bin and divides the interior of the discharge bin into a first bin and a second bin that are interconnected. The interior of one support ring is connected to the discharge port, and the interior of another support ring is connected to the interior of the second bin. Multiple screening gaps are connected to the interior of the first bin; a first discharge hole is also provided at the bottom of the first bin, and the opening of the first discharge hole is funnel-shaped. A second discharge hole is also provided at the bottom of the second bin, and the opening of the second discharge hole is funnel-shaped.

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