Dynamic layered pyrolysis rotary kiln for tin ore

Abstract

The invention discloses a tin ore dynamic layering pyrolysis rotary kiln, and relates to the technical field of rotary kilns. A tin ore dynamic layering pyrolysis rotary kiln comprises a bottom frame, a kiln body is installed on the bottom frame, a plurality of sets of linings are arranged in the kiln body, each lining comprises a sleeve, a plurality of sets of sliding mechanisms facilitating movement of the linings in the kiln body are arranged on the outer surface of the sleeve in a circumferential equidistant mode, and each sliding mechanism comprises a rib plate fixed to the outer surface of the sleeve. A groove is formed in the top of the rib plate, an abutting plate is fixed to one end of the groove, and a plurality of rolling wheels are rotationally connected to the top of the abutting plate. Through the arrangement of the feeding device, the lining and the like, the design of the feeding device considers the characteristics of the tin ore, it is ensured that leakage or blockage cannot occur in the conveying process, in addition, through the preliminary sorting mechanism, the tin ore with large particles can be separated from fine ore, and better conditions are provided for pyrolysis of the tin ore with the large particles.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, in particular to a tin ore dynamic layered pyrolysis rotary kiln. Background Art

[0002] Tin ore is one of the important sources of refined tin, and the rotary kiln has become an important equipment for tin ore refining in terms of providing a uniform heating environment, large-scale production, and easy automatic control. However, there are still aspects that need to be improved in the processing of tin ore using the traditional rotary kiln; For example, a rotary kiln with the authorization announcement number CN202928337U discloses that a lifting plate is inlaid on the lining of the rotary kiln, which is arranged along the length of the kiln and is perpendicular to the lining of the rotary kiln. This rotary kiln uses a lifting plate for forced heat exchange in the lining of the rotary kiln, which enhances the heat exchange effect between the high-temperature hot air flow and the material in the kiln, improves the production capacity of the rotary kiln system, improves the quality of clinker, and reduces the coal consumption per ton of clinker.

[0003] The above rotary kiln adds a lifting plate to the inner lining of the rotary kiln to improve the heat exchange effect between the high-temperature hot air and the material in the kiln, but this method cannot stratify the material, so that particles of different sizes are heated at different speeds, resulting in uneven heating of the material and incomplete heating.

[0004] A rotary kiln with the authorization announcement number CN203068953U discloses that the rotary kiln is composed of: a refractory lining, a heat preservation layer, a heat insulating layer and an outer layer of the kiln shell from the inside to the outside, and a plurality of columnar protrusions are provided in the refractory lining. In the above manner, the rotary kiln can stir the materials in the kiln during the rotation process, and reduce heat loss, which is beneficial to smelting.

[0005] Although the above device can stir and reduce heat loss, this method requires the traditional rotary kiln to be modified. The heating speed of different materials and the moving speed requirements of the materials in the rotary kiln are different. Therefore, the modified rotary kiln may be difficult to apply to the processing of other materials, resulting in an excessive increase in the factory's processing costs.

[0006] From the above, we can see that the same manufacturer uses different rotary kilns for different materials, such as ceramsite sand rotary kiln, cement rotary kiln and kaolin rotary kiln. The basic structure of the rotary kiln is the same, but the cost of manufacturing rotary kilns with different performances is extremely high due to the different calcined products. In addition, the cost of remodeling the rotary kiln is relatively high. After the remodeling, the rotary kiln is difficult to be applied to the processing of other materials. We propose a new type of rotary kiln for processing tin ore materials, and make the rotary kiln still applicable to the processing of other materials to reduce cost consumption. Summary of the invention

[0007] The object of the present invention is to provide a tin ore dynamic layered pyrolysis rotary kiln to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a tin ore dynamic stratification pyrolysis rotary kiln, comprising a base frame, a kiln body is mounted on the base frame, and a plurality of bushings are arranged in the kiln body for pushing in from the feed end of the kiln body to realize the dynamic stratification of the tin ore; The bushing includes a sleeve, and the outer surface of the sleeve is equidistantly provided with a plurality of sliding mechanisms for facilitating the installation of the bushing. The bushing can reduce the friction between the bushing and the inner wall of the kiln body through the sliding mechanism, so that the bushing can be pushed into the kiln body from the feeding end in sequence; The sliding mechanism comprises: A rib plate is fixed on the outer surface of the sleeve, a groove is provided on the top of the rib plate, a support plate is fixed at one end of the groove, a plurality of rollers are rotatably connected to the top of the support plate, a top block is arranged between the bottom of the support plate and the bottom of the groove, a plurality of threaded holes are equidistantly arranged on one end of the sleeve in a circle, and each threaded hole is directly opposite to one end of the top block of the sliding mechanism.

[0009] Further to this solution, a fixing flange is fixed at one end of the kiln body, wherein a plurality of bolt holes are opened on one end of the sleeve and the fixing flange, the sleeve and the fixing flange are connected by fixing bolts in the bolt holes, and a ring body matching the diameter of the outer wall of the kiln body is also fixed on one side of the fixing flange for limiting, the ring body plays a limiting role and forms an anti-fool design, it is only necessary to put the fixing flange on one end of the kiln body, it can limit the movement of the kiln body on the fixing flange, further enhancing the stability of the kiln body, and by using bolt holes and fixing bolts, the connection between the kiln body and the fixing flange can be completed quickly and conveniently.

[0010] Furthermore, the outer surface of the sleeve is fixed with a plurality of reinforcing ribs at equal intervals around the circumference, and the inner wall of the sleeve is also provided with a plurality of groups of partitions at equal intervals around the circumference, each group of partitions is provided with a plurality of partitions, and each group of partitions is located at the sliding mechanism. When the rotary kiln rotates, tin ore with small particles will quickly pass through the gaps between the partitions, which has little effect on their speed. For tin ore with larger particles, these tin ores will be blocked by the partitions and carried to rotate for a certain distance. This design allows large tin ores to be heated for a longer time during the process, thereby increasing their heating time.

[0011] Further to this solution, the feeding device includes a mounting frame, a silo is mounted on the mounting frame, bottom wheels are also provided at the bottom of the mounting frame to facilitate the movement of the feeding device, and a preliminary sorting mechanism is provided on one side of the silo.

[0012] Further to the scheme, the preliminary sorting mechanism includes: A bearing is installed on one side of the silo, and a sleeve is fixed on the inner ring of the bearing. A circle of spacer bars are fixed on one side of the sleeve at equal intervals in a circle. The spacer bars extend into the inside of the kiln body for tin ore sorting.

[0013] Further to this solution, a limiting frame is fixed on the top of one end of the base frame, and two limiting wheels are installed on the limiting frame that slide on the surface of the kiln body; A driving source is installed on the top of the other end of the base frame, and a brake gear is fixed on the output end of the driving source. A gear ring is fixed on the surface of the kiln body at the brake gear, and the gear ring is meshed with the brake gear. The driving source provides power for the movement of the kiln body, and a brake gear is fixed on the output end of the driving source. This brake gear is meshed with the gear ring on the surface of the kiln body. When the kiln body needs to stop moving, the brake gear quickly decelerates and stops the kiln body through the meshing action with the gear ring.

[0014] Preferably, one side of the abutment sleeve abuts against one end of the bushing near the feeding device, and the abutment sleeve is also provided with a circle of connecting screws threadedly connected to the kiln body. The spacer bars on the feeding device are inclined from the abutment sleeve toward the axis of the kiln body. The setting of the spacer bars can screen out smaller tin ore particles, while large particles of tin ore continue to be transported on the spacer bars. The structural design of the spacer bars slows down the transportation speed of large particles of tin ore, allowing small particles of tin ore to be transported first.

[0015] Preferably, the silo is provided with a feed port, which is bucket-shaped and the bottom of which is connected to the inside of the kiln body. The bottom of the feed port is on the same axis as the kiln body and the kiln body is inclined. The bottom of the feed port is on the same axis as the kiln body. This design allows the material to enter the kiln body more smoothly and avoids material blockage. This design not only improves the material processing efficiency.

[0016] The installation of this rotary kiln requires the renovation of the traditional rotary kiln first, especially the cleaning of the inside of the rotary kiln to ensure the cleanliness of the inside of the kiln. After the cleaning is completed, a fixed flange is installed at the discharge end of the kiln, and then the installation of the bushing is completed in sequence at the feed end of the kiln.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The tin ore dynamic stratified pyrolysis rotary kiln is provided with a feeding device and a bushing, etc. The design of the feeding device takes into account the problem that the inconsistency of the size of the tin ore particles leads to uneven and insufficient calcination, ensuring that no leakage or blockage occurs during the transportation process. In addition, through the preliminary sorting mechanism, the larger tin ore particles can be separated from the fine ore, providing better conditions for the pyrolysis of the large tin ore particles, which can improve the utilization rate of the ore and reduce the waste of energy and raw materials. At the same time, a partition on the inner wall of the sleeve is provided in the kiln body, which can slow down the larger tin ore particles and prolong their residence time in the kiln, thereby improving the heating efficiency. By increasing the contact time between the tin ore and the combustion gas, the rate of the pyrolysis reaction is effectively increased, so that the tin ore can be more fully heated and decomposed.

[0018] At the same time, the device also has great advantages in terms of stability. The design of the kiln body's fixing flange, bolt holes, fixing bolts and ring body increases the stability of the kiln body, making it less likely to be displaced or deformed when subjected to external forces. This ensures the stability of the kiln body during operation, reduces equipment failures and downtime, and improves production efficiency. Secondly, the rotary kiln is modified on the traditional rotary kiln, and can be dismantled later without causing damage to the original rotary kiln. In summary, the tin ore dynamic layered pyrolysis rotary kiln improves the heating efficiency, stability and reliability by optimizing the design and structure. It can heat the tin ore more efficiently, improve the utilization rate of the ore, and reduce the waste of energy and raw materials. At the same time, this optimized design and structure have high stability and reliability. This stability and reliability ensure the long-term stable operation of the equipment and improve the production efficiency and product quality. These advantages and beneficial effects make the improved device have great application potential in the tin ore heating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the tin ore dynamic layered pyrolysis rotary kiln of the present invention; Figure 2 It is a schematic diagram of the internal structure of the tin ore dynamic layered pyrolysis rotary kiln of the present invention; Figure 3 It is a schematic diagram of the liner structure of the tin ore dynamic layered pyrolysis rotary kiln of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram of part A in the middle; Figure 5 The figure is a schematic diagram of the structure of the feeding device of the tin ore dynamic layered pyrolysis rotary kiln of the present invention.

[0020] In the figure: 1, base frame; 2, kiln body; 3, feeding device; 301, bearing; 302, sleeve; 303, spacer; 304, mounting frame; 305, bottom wheel; 306, silo; 4, limit frame; 5, limit wheel; 6, driving source; 7, brake gear; 8, ring frame; 9, bushing; 901, sleeve; 902, reinforcing rib; 903, rib plate; 904, sleeve; 905, roller; 906, top block; 907, bolt hole; 908, threaded hole; 909, partition; 10, fixing flange; 11, fixing bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] During the calcination process of tin ore, large particles and small particles are mixed together. When the calcination time of large particles is insufficient, the small particles have been calcined and discharged. Calcination of large and small particles together will affect the reduction efficiency. Therefore, we design a new type of rotary kiln, by installing a bushing 9 inside the rotary kiln. The bushing 9 is spliced ​​and pushed into the interior from one end for automatic alignment. A partition plate 909 structure is provided on the bushing 9 to slow down the travel speed of large particles of tin ore. A feeding device 3 is installed at the other end to fix the bushing 9. A screening device is provided at the feeding device 3 to screen large tin ore and small tin ore when feeding, so that small tin ore enters the rotary kiln first for calcination, and the large particles of ore that enter later can be fully calcined.

[0023] like Figure 1-Figure 5 As shown, the present invention provides a technical solution: a tin ore dynamic layered pyrolysis rotary kiln, comprising a base frame 1, a kiln body 2 is mounted on the base frame 1, and a plurality of sets of bushings 9 are arranged in the kiln body 2; The liner 9 includes a sleeve 901. The outer surface of the sleeve 901 is equidistantly provided with multiple sets of sliding mechanisms for facilitating the movement of the liner 9 in the kiln body 2. The liner 9 is installed in a splicing manner in the rotary kiln. The liner 9 reduces the traveling speed of the tin ore with larger particles, thereby ensuring that the tin ore with larger particles is fully burned. The sliding mechanism includes: A rib plate 903 is fixed on the outer surface of the sleeve 901, a groove is formed on the top of the rib plate 903, a support plate 904 is fixed on one end of the groove, a plurality of rollers 905 are rotatably connected to the top of the support plate 904, a top block 906 is arranged between the bottom of the support plate 904 and the bottom of the groove, a plurality of threaded holes 908 are formed at equal distances from one end of the sleeve 901, and each threaded hole 908 is directly opposite to one end of the top block 906 of the sliding mechanism; A feeding device 3 for preliminary sorting is provided at one end of the kiln body 2. The feeding device 3 is installed at the feeding end of the rotary kiln to reinforce the bushing 9 installed in the rotary kiln. A screening device is provided at the feeding device 3 to screen large tin ore and small tin ore during feeding, so that the small tin ore enters the rotary kiln first for calcination, and the ore with large particles entering later can be fully calcined.

[0024] The equipment is retrofitted on a traditional rotary kiln to achieve dynamic stratification of tin ore, which can reduce the difficulty and cost of rotary kiln modification. The design of the internally installed bushing 9 and the feeding device 3 is used to achieve dynamic stratification of the equipment, so that the tin ore can be fully burned during the processing, the heating efficiency is improved, and the processing quality is guaranteed.

[0025] To ensure the smooth implementation of this embodiment, it is necessary to understand that a fixing flange 10 is fixed to one end of the kiln body 2. This fixing flange 10 plays an important fixing role in the kiln body 2. In order to achieve this fixation, one end of the sleeve 901 is connected to a plurality of bolt holes 907 opened on the fixing flange 10. These bolt holes 907 are part of the fixing flange 10 and are used to insert the fixing bolts 11, thereby tightly connecting the sleeve 901 and the fixing flange 10 together.

[0026] This connection method not only increases the stability of the kiln body 2, but also makes it less likely for the kiln body 2 to be displaced or deformed when subjected to external forces. In addition, a ring body that matches the diameter of the outer wall of the kiln body 2 is fixed on one side of the fixed flange 10. This ring body serves as a limit and forms an anti-foolproof design. It is only necessary to put the fixed flange 10 on one end of the kiln body 2. It can limit the movement of the kiln body 2 on the fixed flange 10, further enhancing the stability of the kiln body 2.

[0027] This design not only takes into account the stability of the kiln body 2, but also fully considers its convenience of use. By using the bolt holes 907 and the fixing bolts 11, the connection between the kiln body 2 and the fixing flange 10 can be completed quickly and conveniently. At the same time, the use of the ring body also makes the kiln body 2 more convenient during installation and disassembly.

[0028] To ensure the smooth implementation of this embodiment, it should be understood that a number of reinforcing ribs 902 are fixed equidistantly around the outer surface of the sleeve 901 of the rotary kiln. These reinforcing ribs 902 not only increase the strength of the sleeve 901, but also provide it with better stability.

[0029] The inner wall of the sleeve 901 is even more unique. It is provided with multiple groups of partitions 909 at equal intervals around the circumference. Each group of partitions 909 is provided with multiple partitions. Their main function is to slow down the tin ore with large particles. When the rotary kiln rotates, the tin ore with small particles will quickly pass through the gaps between the partitions 909, which has little effect on their speed.

[0030] However, for tin ores with larger particles, these tin ores will be blocked by the partition 909 and carried to rotate for a certain distance. This design allows the large tin ores to be heated for a longer time during the process, thereby increasing their heating time. This design not only improves the heating efficiency of the tin ore, but also allows the large tin ores to better contact with the heat source, further improving their heating effect.

[0031] To ensure the smooth implementation of this embodiment, it should be understood that the loading device 3 is mainly responsible for transporting raw materials from one place to another. This device is composed of a mounting frame 304 , a silo 306 and a bottom wheel 305 .

[0032] The mounting frame 304 supports the entire device and is also equipped with a silo 306, which is where the raw materials are stored. Its capacity can be adjusted as needed to meet production needs. The design of the silo 306 takes into account the characteristics of the raw materials to ensure that no leakage or blockage occurs during transportation.

[0033] The bottom wheel 305 is a part of the bottom of the mounting frame 304, which provides convenience for the loading device 3 to move. The design of the bottom wheel 305 allows the loading device 3 to be easily moved on the ground, so that it can be reconfigured according to production needs. In addition, the bottom wheel 305 also has a braking function, which can fix the position of the device when necessary. A preliminary sorting mechanism is provided on one side of the silo 306. Through this preliminary sorting mechanism, tin ores of different sizes can be preliminarily screened, providing better conditions for the pyrolysis of large tin ores.

[0034] To ensure the smooth implementation of this embodiment, it should be understood that the preliminary sorting mechanism includes: A bearing 301 is installed on one side of the silo 306, and a sleeve 302 is fixed to the inner ring of the bearing 301. A circle of spacer bars 303 are fixed to one side of the sleeve 302 at equal intervals. The spacer bars 303 extend into the interior of the kiln body 2 for tin ore sorting.

[0035] In order to ensure the smooth implementation of this embodiment, it is necessary to understand that the base frame 1 plays a vital role as the supporting structure of the entire system. A limit frame 4 is fixed on the top of one end of the base frame 1 to ensure that the kiln body 2 does not exceed a predetermined range during movement. Two limit wheels 5 are installed on the limit frame 4. The two limit wheels 5 slide along the surface of the kiln body 2 to play a guiding and limiting role.

[0036] A driving source 6 is installed on the top of the other end of the base frame 1. The driving source 6 provides power for the movement of the kiln body 2. A brake gear 7 is fixed to the output end of the driving source 6. The brake gear 7 meshes with the gear ring on the surface of the kiln body 2. When the kiln body 2 needs to stop moving, the brake gear 7 meshes with the gear ring to quickly decelerate and stop the kiln body 2. A ring frame 8 for protecting the gear ring is also installed on the base frame 1.

[0037] The design of this base frame 1 not only takes into account the movement requirements of the kiln body 2, but also fully considers the stability, safety and reliability of the system. Through the coordinated work of the base frame 1, the limit frame 4, the limit wheel 5, the driving source 6 and the brake gear 7, the entire system can operate efficiently and stably, providing a strong guarantee for the movement of the kiln body 2.

[0038] To ensure the smooth implementation of this embodiment, it is necessary to understand that the sleeve 302 is an important part of the feeding device 3. It is located near the connection between the feeding device 3 and the kiln body 2. One side of the sleeve 302 is tightly against one end of the bushing 9, which can tightly against the bushing 9, increase the tightness of the connection between the bushings 9, reduce the gap between the bushings 9, and make the entire conveying path smooth. Not only that, the sleeve 302 is also provided with a circle of connecting screws that are threadedly connected to the kiln body 2. These screws not only enhance the connection strength between the feeding device 3 and the kiln body 2, but also ensure the stability and reliability between the two.

[0039] It is worth mentioning that the spacer bars 303 on the feeding device 3 are inclined from the sleeve 302 to the axis of the kiln body 2. The setting of the spacer bars 303 can screen out smaller tin ore particles, while large particles of tin ore continue to be transported on the spacer bars 303. The structural design of the spacer bars 303 slows down the transportation speed of large particles of tin ore, allowing small particles of tin ore to be transported first.

[0040] The design of the sleeve 302 plays a vital role in the entire equipment. It not only provides stable support and connection, but also ensures the smooth transmission of materials and the long-term stable operation of the equipment.

[0041] To ensure the smooth implementation of this embodiment, it should be understood that the feed port of the silo 306 is bucket-shaped and is designed to be very spacious to accommodate a large amount of material. The bottom of the feed port is connected to the inside of the kiln body 2, so that the material can smoothly enter the inside of the kiln body 2.

[0042] The kiln body 2 is an inclined device. Its inclined design allows the material to flow better when entering the kiln body 2. At the same time, the bottom end of the feed port is on the same axis as the kiln body 2. This design allows the material to enter the kiln body 2 more smoothly and avoids material blockage. This design not only improves the material processing efficiency, but also makes the operation of the entire silo 306 more convenient.

[0043] The modification steps of this rotary kiln on the traditional rotary kiln are: First, the traditional rotary kiln is renovated, and in particular, the interior of the rotary kiln needs to be cleaned to ensure the cleanliness of the interior of the kiln body. After the cleaning is completed, a fixed flange 10 is installed at one end of the kiln body 2 where the material is discharged, and then the bushing 9 is installed in sequence at the feed end of the kiln body 2; Determine the number of bushings 9 according to the length of the kiln body 2, first push the bushings 9 into the kiln body 2, then insert a threaded rod into each threaded hole 908 at one end of the sleeve 901, use a tool to rotate the threaded rod to resist one end of the top block 906, push the top block 906 to the other end, lift the support plate 904, and let the roller 905 roll on the inner wall of the kiln body 2, so as to facilitate pushing the sleeve 901 into the kiln body 2, and before pushing the first bushing 9 into the kiln body 2, put the fixing bolts 11 on the bushing 9, and then fix it with the fixing flange 10 to complete the installation and connection of the end, then push the bushings 9 into the kiln body 2 in turn, and finally push the feeding device 3 to the feeding end of the kiln body 2 and install and fix it to complete the improved installation of the rotary kiln.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tin ore dynamic layered pyrolysis rotary kiln, comprising a base frame (1), characterized in that: A kiln body (2) is mounted on the base frame (1), and a plurality of bushings (9) are arranged in the kiln body (2) and are pushed in from the feed end of the kiln body (2) to realize dynamic stratification of tin ore; The bushing (9) comprises a sleeve (901), the outer surface of the sleeve (901) being equidistantly arranged with a plurality of sets of sliding mechanisms for facilitating installation of the bushing (9), the bushing (9) being able to reduce friction with the inner wall of the kiln body (2) through the sliding mechanisms, so that the bushing (9) can be pushed in sequentially from the feed end of the kiln body (2); The sliding mechanism comprises: A rib plate (903) is fixed to the outer surface of the sleeve (901), the rib plate (903) having a groove at the top, a support plate (904) being fixed at one end of the groove, a plurality of rollers (905) being rotatably connected to the top of the support plate (904), a top block (906) being arranged between the bottom of the support plate (904) and the bottom of the groove, a plurality of threaded holes (908) being equidistantly arranged at one end of the sleeve (901), each threaded hole (908) being directly opposite to one end of the top block (906) of the sliding mechanism; The kiln body (2) is provided with a feeding device (3) for preliminary sorting and feeding of tin ore particles of different sizes. The bushings (9) can be provided with a thrust by means of the feeding device (3) so that the contact surfaces between the bushings (9) are in contact with each other for stabilization.

2. A tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: A fixing flange (10) is fixed to one end of the kiln body (2), wherein a plurality of bolt holes (907) are provided on one end of the sleeve (901) and the fixing flange (10), and the sleeve (901) and the fixing flange (10) are connected via fixing bolts (11) in the bolt holes (907), and a ring body having a diameter matching that of the outer wall of the kiln body (2) is also fixed to one side of the fixing flange (10) for limiting the position.

3. The tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: The outer surface of the sleeve (901) is fixed with a plurality of reinforcing ribs (902) at equal intervals around the circumference, and the inner wall of the sleeve (901) is also provided with a plurality of groups of partitions (909) at equal intervals around the circumference, each group of partitions (909) is provided with a plurality of partitions, and each group of partitions (909) is arranged at the position of the sliding mechanism.

4. The tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: The loading device (3) comprises a mounting frame (304), a material bin (306) being mounted on the mounting frame (304), a bottom wheel (305) being arranged at the bottom of the mounting frame (304) for facilitating the movement of the loading device (3), and a preliminary sorting mechanism being arranged at one side of the material bin (306).

5. The tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: The preliminary sorting mechanism comprises: A bearing (301) is mounted on one side of the silo (306), a sleeve (302) is fixed to the inner ring of the bearing (301), a circle of spacer bars (303) are fixed to one side of the sleeve (302) in a circular equidistant pattern, and the spacer bars (303) extend into the interior of the kiln body (2) for tin ore sorting.

6. The tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: A limiting frame (4) is fixed to the top of one end of the base frame (1), and two limiting wheels (5) are mounted on the limiting frame (4) and slide on the surface of the kiln body (2); A driving source (6) is installed on the top of the other end of the base frame (1), a brake gear (7) is fixed to the output end of the driving source (6), and a gear ring is fixed on the surface of the kiln body (2) at the brake gear (7), and the gear ring is meshed with the brake gear (7).

7. The tin ore dynamic layered pyrolysis rotary kiln according to claim 1, characterized in that: One side of the abutment sleeve (302) abuts against one end of the bushing (9) near the feeding device (3), and the abutment sleeve (302) is also provided with a circle of connecting screws that are screwed to the kiln body (2), and the spacing bars (303) on the feeding device (3) are all inclined from the abutment sleeve (302) to the axis of the kiln body (2).

8. The tin ore dynamic layered pyrolysis rotary kiln according to claim 4, characterized in that: The material bin (306) is provided with a feed inlet, which is bucket-shaped and has a bottom end connected to the inside of the kiln body (2). The bottom end of the feed inlet and the kiln body (2) are located on the same axis and the kiln body (2) is arranged tilted.

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