A type of metallurgical sludge split rotary kiln

Abstract

This invention discloses a modular rotary kiln for metallurgical sludge, relating to the field of rotary kiln technology. Specifically, it includes multiple kiln bodies, a kiln head and a kiln tail located at the outer sides of two kiln bodies, and multiple bases for supporting the kiln head, kiln bodies, and kiln tail. A burner is installed on one side of the kiln head. Two adjacent kiln bodies are connected and fixed to the top outer wall of the bases via a connecting support mechanism. One of the bases has a drive mechanism on its outer wall for rotating one of the kiln bodies. This invention, by configuring the kiln body into multiple components, adopts a modular structure, which facilitates transportation and installation for larger rotary kiln structures. Furthermore, the connecting components ensure reliable sealing between adjacent kiln bodies. Additionally, by using stepped grooves and stepped protrusions as stepped surfaces, it provides three sealing surfaces, increasing the reliability of the seal.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, and more particularly to a metallurgical sludge split-type rotary kiln. Background Technology

[0002] Rotary kilns, with their high-temperature melting capacity, process adjustability, continuous processing, and mature engineering experience, have become the preferred technology for treating metallurgical sludge (especially hazardous waste). They not only solve the problems of heavy metal stabilization and organic pollution, but also turn waste into treasure.

[0003] A search revealed a Chinese patent publication number CN115265176B, which discloses a waste heat recovery system for a rotary kiln and a rotary kiln, including a bottom plate and two support plates mounted on the bottom plate. The rotary kiln body is rotatably connected to the two support plates, and the rotary kiln body is tilted to one side.

[0004] The aforementioned patent has the following shortcomings: its rotary kiln body adopts an integrated design. On the one hand, the integrated design of the body structure makes the large rotary kiln heavy, and the hoisting, transportation and installation are inconvenient. On the other hand, when the body suffers local damage that cannot be repaired, the whole body needs to be replaced, which is costly.

[0005] Therefore, this invention proposes a split-type rotary kiln for metallurgical sludge. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a metallurgical sludge split rotary kiln.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A metallurgical sludge split-type rotary kiln includes multiple kiln bodies, a kiln head and a kiln tail located on the outer sides of two kiln bodies at their ends, and multiple bases for supporting the kiln head, kiln bodies, and kiln tail.

[0009] A burner is provided on one side of the kiln head. Two adjacent kiln bodies are connected by a connecting support mechanism and supported and fixed to the top outer wall of the base. One of the bases is provided with a drive mechanism for rotating one of the kiln bodies. The kiln head and the kiln body, and the kiln tail and the kiln body are all connected by a sealing device.

[0010] The connecting support mechanism includes a connecting component for connecting the two kiln bodies, a connecting component for rolling support of the connecting component, and a base for supporting and fixing the support component to the top outer wall of the base.

[0011] The connecting assembly includes a fixing ring welded to the outer wall of the end of the kiln body and an outer sealing ring that fits into the outer walls of the two fixing rings. One of the fixing rings has a stepped groove on its inner wall, and the other fixing ring has a stepped protrusion fixed to its side wall that contacts and seals with the stepped groove.

[0012] Preferably, when the ladder groove and the ladder protrusion are in contact, there is a compensating gap between the two adjacent kiln bodies and the adjacent fixed ring.

[0013] Furthermore, the stepped protrusion has a hollow structure, and its interior is filled with a thermal expansion medium. The composition of the thermal expansion medium is: Bi 50%, Pb 26.7%, Cd 13.3%, Sn 10%, with a melting point of 70 degrees Celsius and a coefficient of thermal expansion α = 35 × 10⁻⁶. 6 / K.

[0014] Based on the aforementioned scheme: the outer sealing ring is wrapped around the outer wall of the fixed ring, and multiple blind grooves are opened on the inner wall of the opposite side of the two fixed rings. Multiple through grooves are opened on the inner wall of the outer sealing ring, and a transmission column is provided in each set of mating through grooves and blind grooves.

[0015] A better option among the aforementioned solutions is that: multiple ribs arranged in a circular array are fixed on both sides of the outer sealing ring; multiple sets of arc-shaped elastic steel plates corresponding to the number and position of the ribs are fixed on the side wall of the fixing ring; and fastening bolts are fixed on one side of the outer wall of the ribs by bolts, with the ends of the fastening bolts contacting and engaging with the arched portion of the arc-shaped elastic steel plates.

[0016] As a further aspect of the present invention: the support assembly is designed in two symmetrical configurations, including a support frame fixed to the outer wall of the top of the base by bolts and a support wheel rotatably connected to the inner wall of the support frame and in rolling contact with the ladder groove.

[0017] Meanwhile, both sides of the support wheel are connected to bushings via connecting shafts. The bushings are rotatably connected to the inner wall of the support frame. The end of the connecting shaft is fixed with an end plate by bolts, and the end plate is connected to the side wall of the bushing by a spring.

[0018] As a preferred embodiment of the present invention: the outer wall of the connecting shaft is provided with a plurality of flat key protrusions, and the connecting shaft and the flat key protrusions are fitted with the inner wall of the bushing with clearance.

[0019] Meanwhile, the driving mechanism includes an outer frame, a gear ring, and a fixed ring. The outer frame is fixed to the top outer wall of the base, the gear ring is rotatably connected to the inner wall of the outer frame, and the fixed ring is fixed to the outer wall of the kiln body. The fixed ring and the gear ring are driven by multiple transmission steel plates. A worm is rotatably connected to the bottom inner side of the outer frame, and a worm wheel that meshes with the worm is rotatably connected to the bottom inner wall of the outer frame. The gear ring meshes with the outer wall of the worm wheel through the tooth grooves on its outer wall.

[0020] As a preferred embodiment of the present invention: the side wall of the fixed ring is provided with a transmission groove that mates with the end of the transmission steel plate, and the inner wall of the toothed ring is provided with a slot that mates with the transmission steel plate with a clearance.

[0021] The slot is a structure with one end open and the other end closed, and the toothed ring is located at the open end of the slot and is fixed with a sealing plate for sealing the transmission steel plate by bolts.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The present invention, on the one hand, sets the kiln body into multiple components, which is a split structure, thereby facilitating the transportation and installation of the large rotary kiln structure. At the same time, by setting connecting components to connect adjacent kiln bodies, it can ensure reliable sealing between adjacent kiln bodies. Furthermore, by setting the ladder groove and ladder protrusion as ladder surface, it has three sealing surfaces, which increases the reliability of sealing.

[0024] 2. This invention, by making the thermal expansion medium hollow and specifically designing its composition, utilizes its melting point and thermal expansion characteristics. In use, the thermal expansion medium changes from a solid to a liquid state, increasing its volume and generating an outward expansion force on the tiered protrusion. This causes the tiered protrusion to deform slightly outward, increasing its adhesion to the tiered groove and improving the sealing effect. Conversely, in non-use, the thermal expansion medium solidifies, reducing its volume and lowering the internal stress of the tiered protrusion and the contact pressure between the tiered protrusion and the tiered groove, preventing fatigue damage and increasing service life.

[0025] 3. In this invention, based on the kiln body with a split structure, the outer sealing ring and the fixing ring are set as a sleeve structure, which can be further disassembled and installed. At the same time, by setting through grooves, transmission columns and blind grooves, the outer sealing ring can be used as a medium to make the two fixing rings rotate synchronously. This can prevent the transmission of torque by the friction force of the stepped groove and the stepped protrusion, and thus prevent friction loss caused by large static friction between the stepped groove and the stepped protrusion, ensuring the sealing effect.

[0026] 4. In this invention, by setting fastening bolts and an arc-shaped elastic steel plate, the outer sealing ring and the fixing ring can be axially limited. On the other hand, the arc-shaped elastic steel plate will undergo elastic deformation under force and store elastic potential energy. Combined with the ladder-type structure of ladder groove and ladder protrusion, even if the ladder groove and ladder protrusion are worn, the elastic potential energy stored in the arc-shaped elastic steel plate can be used for axial compensation to ensure the sealing effect.

[0027] 5. In this invention, by setting up a support assembly, wherein the support wheel, when rolling support is provided to the outer sealing ring, can undergo axial displacement due to the connection shaft and the clearance fit between the connection shaft and the bushing. This allows the kiln body to have a certain degree of axial movement freedom while providing radial support, thereby ensuring that the movement energy for sealing compensation can be reliably realized and increasing the reliability of the seal.

[0028] 6. In this invention, based on the design of a split kiln body, the entire drive mechanism is also designed as a split mechanism. Thus, except for the fixing ring, the entire drive mechanism is detachably connected to the kiln body. Compared with the traditional welded transmission, it has a certain transmission buffer gap and is also easier to disassemble and assemble. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a metallurgical sludge split rotary kiln proposed in this invention.

[0030] Figure 2 This is a schematic diagram of the connection and support mechanism of a metallurgical sludge split rotary kiln proposed in this invention.

[0031] Figure 3 This is a partial cross-sectional view of the connecting components of a metallurgical sludge split rotary kiln proposed in this invention.

[0032] Figure 4 This is a schematic diagram of the matching structure of the fixed ring and the outer sealing ring of a metallurgical sludge split rotary kiln proposed in this invention;

[0033] Figure 5 This is a cross-sectional view of the fixed ring and outer sealing ring of a metallurgical sludge split rotary kiln proposed in this invention.

[0034] Figure 6 This is a schematic diagram of the fixing ring and outer sealing ring matching and limiting fixing structure of a metallurgical sludge split rotary kiln proposed in this invention;

[0035] Figure 7 This is a schematic diagram of the support component structure of a metallurgical sludge split rotary kiln proposed in this invention.

[0036] Figure 8 This invention proposes a separate rotary kiln for metallurgical sludge treatment. Figure 7 Enlarged structural diagram of section A;

[0037] Figure 9 This is a schematic diagram of the drive mechanism structure of a metallurgical sludge split rotary kiln proposed in this invention.

[0038] Figure 10 This is a cross-sectional schematic diagram of the drive mechanism of a metallurgical sludge split rotary kiln proposed in this invention.

[0039] Figure 11 This is a schematic diagram of the sealing plate structure of a metallurgical sludge split rotary kiln proposed in this invention.

[0040] In the diagram: 1. Base; 2. Burner; 3. Kiln head; 4. Drive mechanism; 5. Connecting support mechanism; 6. Kiln body; 7. Sealing device; 8. Kiln tail; 9. Base; 10. Support assembly; 11. Connecting assembly; 12. Thermal expansion medium; 13. Fixing ring; 14. Ladder groove; 15. Ladder protrusion; 16. Outer sealing ring; 17. Through groove; 18. Transmission column; 19. Blind groove; 20. Fastening bolt; 21. Arc-shaped elastic steel plate; 22. Support wheel; 23. Support frame; 24. Spring; 25. Connecting shaft; 26. End plate; 27. Bushing; 28. Flat key protrusion; 29. ​​Outer frame; 30. Transmission steel plate; 31. Slot; 32. Transmission groove; 33. Gear ring; 34. Motor; 35. Worm; 36. Worm wheel; 37. Gear groove; 38. Sealing plate; 39. Fixing ring; 40. Rib. Detailed Implementation

[0041] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] Example 1:

[0044] A type of metallurgical sludge split rotary kiln, such as Figures 1-11 As shown, the system includes multiple kiln bodies 6, kiln heads 3 and kiln tails 8 located on the outer sides of two kiln bodies 6 at their ends, and multiple bases 1 for supporting the kiln heads 3, kiln bodies 6, and kiln tails 8. A burner 2 is provided on one side of the kiln head 3. Two adjacent kiln bodies 6 are connected by a connecting support mechanism 5 and supported and fixed to the top outer wall of the base 1. One of the bases 1 has a drive mechanism 4 on its outer wall for rotating one of the kiln bodies 6. The kiln head 3 and the kiln body 6, and the kiln tail 8 and the kiln body 6 are connected by a sealing device 7. In this embodiment, since the sealing device 7 is prior art, for example, it has been disclosed in patent publication number CN119043004B, this embodiment has not made any inventive effort on it, so it will not be described in detail.

[0045] The connecting support mechanism 5 includes a connecting component 11 for connecting the two kiln bodies 6, a connecting component 11 for rolling support of the connecting component 11, and a base 9 for supporting and fixing the support component 10 to the top outer wall of the base 1.

[0046] The connecting assembly 11 includes a fixing ring 13 welded to the outer wall of the end of the kiln body 6 and an outer sealing ring 16 that fits into the outer wall of the two fixing rings 13. One of the fixing rings 13 has a stepped groove 14 on its inner wall, and the other fixing ring 13 has a stepped protrusion 15 that contacts and seals with the stepped groove 14 on its side wall.

[0047] Furthermore, when the ladder groove 14 and the ladder protrusion 15 are in contact and engaged, there is a compensating gap between the two adjacent kiln bodies 6 and the adjacent fixed ring 13.

[0048] The stepped protrusion 15 has a hollow structure, and the interior of the stepped protrusion 15 is filled with a thermal expansion medium 12. The thermal expansion medium 12 is a metal or alloy with a high coefficient of thermal expansion and a melting point below the operating temperature of the entire rotary kiln.

[0049] The thermal expansion medium 12 has the following composition: Bi 50%, Pb 26.7%, Cd 13.3%, Sn 10%, with a melting point of 70 degrees Celsius and a coefficient of thermal expansion α = 35 × 10⁻⁶. 6 / K.

[0050] This device limits the filling form of the thermally expanding medium 12 into the inner cavity of the stepped protrusion 15, and includes the following steps:

[0051] S1: First, a filling port is opened on one side of the ladder protrusion 15, and a filling valve is installed. The filling valve is embedded and will not affect the mating surface between the ladder groove 14 and the ladder protrusion 15.

[0052] S2: Then the molten thermal expansion medium 12 is injected into the inner cavity of the ladder protrusion 15 through the filling valve until it reaches 90%-95% of the total volume of the inner cavity of the ladder protrusion 15 and then stops.

[0053] S3: Let stand and wait for the thermal expansion medium 12 to cool down and solidify. After solidification, continue to add thermal expansion medium 12 until it fills the entire inner cavity of the ladder protrusion 15.

[0054] This step ensures that the thermal expansion medium 12 inside the ladder protrusion 15 becomes liquid, which can apply sufficient external expansion force to the ladder protrusion 15.

[0055] This device, on the one hand, sets the kiln body 6 into multiple components, which is a split structure, thus facilitating the transportation and installation of the large rotary kiln structure. On the other hand, by setting the connecting component 11 to connect adjacent kiln bodies 6, it can ensure reliable sealing between adjacent kiln bodies 6. Furthermore, by setting the ladder groove 14 and ladder protrusion 15 as ladder surface, it has three sealing surfaces, which increases the reliability of sealing.

[0056] In addition, this device makes the thermal expansion medium 12 hollow and designs its composition accordingly. By utilizing its melting point and thermal expansion characteristics, the thermal expansion medium 12 changes from solid to liquid in the use state, and its volume increases. This increases the outward expansion force on the ladder protrusion 15, causing the ladder protrusion 15 to deform slightly outward. This makes its fit with the ladder groove 14 stronger and the sealing effect better. At the same time, in the non-use state, the thermal expansion medium 12 becomes solid and its volume decreases. This reduces the internal stress of the ladder protrusion 15 and the contact pressure between the ladder protrusion 15 and the ladder groove 14, preventing fatigue damage and increasing service life.

[0057] like Figure 4 , Figure 5 As shown, the outer sealing ring 16 is wrapped around the outer wall of the fixing ring 13, and multiple blind grooves 19 are opened on the inner wall of the opposite side of the two fixing rings 13. Multiple through grooves 17 are opened on the inner wall of the outer sealing ring 16, and a transmission column 18 is provided in each set of mating through grooves 17 and blind grooves 19.

[0058] Based on the kiln body 6 with a split structure, this device sets the outer sealing ring 16 and the fixing ring 13 as a sleeve structure, which can be further disassembled and installed. At the same time, by setting the through groove 17, the transmission column 18 and the blind groove 19, the outer sealing ring 16 can be used as a medium to make the two fixing rings 13 rotate synchronously. This can prevent the transmission of torque by the friction force of the stepped groove 14 and the stepped protrusion 15, and thus prevent friction loss caused by the large static friction between the stepped groove 14 and the stepped protrusion 15, ensuring the sealing effect.

[0059] like Figure 6 As shown, multiple ribs 40 arranged in a circular array are fixed on both sides of the outer sealing ring 16. Multiple sets of arc-shaped elastic steel plates 21, which correspond to the number and position of the ribs 40, are fixed on the side wall of the fixing ring 13. Fastening bolts 20 are fixed on one side of the outer wall of the ribs 40 by bolts. The ends of the fastening bolts 20 are in contact with the arched part of the arc-shaped elastic steel plates 21.

[0060] This device, by setting fastening bolts 20 and arc-shaped elastic steel plate 21, can axially limit the outer sealing ring 16 and the fixing ring 13. On the other hand, the arc-shaped elastic steel plate 21 will elastically deform and store elastic potential energy when subjected to force. Combined with the ladder-type structure of ladder groove 14 and ladder protrusion 15, even if the ladder groove 14 and ladder protrusion 15 are worn, the elastic potential energy stored in the arc-shaped elastic steel plate 21 can be used for axial compensation to ensure the sealing effect.

[0061] To solve the support problem; such as Figure 7 , 8 As shown, the support assembly 10 has two sets of symmetrical designs, including a support frame 23 that is fixed to the top outer wall of the base 9 by bolts and a support wheel 22 that is rotatably connected to the inner side wall of the support frame 23 and rolls into contact with the ladder groove 14.

[0062] Both sides of the support wheel 22 are connected to bushings 27 via connecting shafts 25. The bushings 27 are rotatably connected to the inner wall of the support frame 23. The end of the connecting shaft 25 is fixed with an end plate 26 by bolts. The end plate 26 is connected to the side wall of the bushing 27 by springs 24.

[0063] The outer wall of the connecting shaft 25 is provided with a plurality of flat key protrusions 28, and the connecting shaft 25 and the flat key protrusions 28 are fitted with the inner wall of the bushing 27 with clearance.

[0064] Because of the stepped groove 14, stepped protrusion 15, fastening bolts 20, and arc-shaped elastic steel plate 21, the entire kiln body 6 needs a certain degree of axial movement to ensure sealing during wear. Therefore, one end of the rotary kiln needs to be fixed while the other end is movable. In this embodiment, the kiln tail 8, with its relatively simple structure, is preferably used as the movable end, which can be slidably connected to the base 1 via a track. Simultaneously, since the kiln body 6 also requires axial displacement freedom, therefore:

[0065] This device, by setting up a support assembly 10, wherein the support wheel 22, while rolling support to the outer sealing ring 16, can undergo axial displacement due to the connection shaft 25 and the clearance fit between the connection shaft 25 and the bushing 27, thereby ensuring that the kiln body 6 has a certain degree of axial movement freedom while providing radial support, thus ensuring that the movement of the sealing compensation can be reliably realized and increasing the sealing reliability.

[0066] In this embodiment, assembly is required first. Since the kiln head 3 is fixed and the kiln tail 8 is movable, the entire rotary kiln must be assembled from the kiln head 3 to the kiln tail 8. The steps are as follows: First, the kiln head 3 is positioned and fixed. Then, one of the kiln bodies 6 is connected to the kiln head 3 through the sealing device 7. Next, the other kiln body 6 is hoisted so that the two kiln bodies 6, the ladder groove 14, and the fixing ring 13 are engaged. At the same time, the blind groove 19 is rotated and aligned. Then, the transmission column 18 is inserted, and the outer sealing ring 16 is fitted onto the outer wall of the two fixing rings 13. Then, the fastening bolts 20 are screwed into the rib 40 and gradually tightened so that the arc-shaped elastic steel plate 21 has a certain deformation. The two kiln bodies 6 can then be assembled. The assembly continues until the required number of kiln bodies 6 is reached. Then, the kiln body 6 is connected to the kiln tail 8 through the sealing device 7, and the axial distance is compensated by the track of the kiln tail 8.

[0067] Example 2:

[0068] A type of metallurgical sludge split rotary kiln, such as Figures 1-11 As shown, in order to solve the driving problem, this embodiment makes the following improvements based on embodiment 1: In this embodiment, the installation position of the driving mechanism 4 is not limited. However, since all kiln bodies 6 except those connected to the kiln head 3 require axial compensation degrees of freedom, this embodiment sets the driving mechanism 4 at the kiln body 6 connected to the kiln head 3. Specifically:

[0069] The driving mechanism 4 includes an outer frame 29, a toothed ring 33, and a fixed ring 39. The outer frame 29 is fixed to the top outer wall of the base 1. The toothed ring 33 is rotatably connected to the inner wall of the outer frame 29. The fixed ring 39 is fixed to the outer wall of the kiln body 6. The fixed ring 39 and the toothed ring 33 are connected by multiple transmission steel plates 30. A worm gear 35 is rotatably connected to the bottom inner side of the outer frame 29. A worm wheel 36 that meshes with the worm gear 35 is rotatably connected to the bottom inner wall of the outer frame 29. The toothed ring 33 meshes with the outer wall of the worm wheel 36 through the tooth groove 37 on its outer wall.

[0070] The side wall of the fixed ring 39 is provided with a transmission groove 32 that mates with the end of the transmission steel plate 30, and the inner wall of the toothed ring 33 is provided with a slot 31 that mates with the transmission steel plate 30 with a clearance.

[0071] The slot 31 has a structure with one end open and the other end closed, and the toothed ring 33 is located at the open end of the slot 31 and is fixed with a sealing plate 38 for sealing the transmission steel plate 30 by bolts.

[0072] In this embodiment, during assembly, the transmission steel plate 30 can be inserted into the slot 31 and the transmission groove 32 to complete the transmission engagement between the gear ring 33 and the fixed ring 39. At the same time, the sealing plate 38 is installed to prevent the transmission steel plate 30 from displacing and falling off from the opening of the slot 31. In use, when the motor 34 is started, it can drive the worm gear 35 to rotate, thereby driving the gear ring 33 to rotate through the worm wheel 36, and then driving the fixed ring 39 to rotate through the transmission steel plate 30, ultimately driving multiple kiln bodies 6 to rotate synchronously.

[0073] In this device, the entire drive mechanism 4 is also set as a separate unit based on the split kiln body 6. Thus, except for the fixing ring 39, the entire drive mechanism 4 is detachably connected to the kiln body 6. Compared with the traditional welded transmission, it has a certain transmission buffer gap and is also easier to disassemble and assemble.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A metallurgical sludge split rotary kiln, comprising a plurality of kiln bodies (6), a kiln head (3) and a kiln tail (8) respectively located outside two kiln bodies (6) at the end, and a plurality of bases (1) for supporting the kiln head (3), the kiln body (6) and the kiln tail (8), characterized in that, one side of the kiln head (3) is provided with a burner (2), and the adjacent two kiln bodies (6) are connected by a connecting support mechanism (5) and are fixedly supported on the top outer wall of the base (1), the outer wall of one of the bases (1) is provided with a driving mechanism (4) for driving rotation of one of the kiln bodies (6), and the kiln head (3) and the kiln body (6), the kiln tail (8) and the kiln body (6) are connected by sealing devices (7); the connecting support mechanism (5) comprises a connecting assembly (11) for connecting the two kiln bodies (6), a connecting assembly (11) for rolling support of the connecting assembly (11), and a base (9) for supporting and fixing the support assembly (10) on the top outer wall of the base (1); the connecting assembly (11) comprises a fixed ring (13) welded to the outer wall of the end of the kiln body (6) and an outer sealing ring (16) fitted to the outer wall of the two fixed rings (13), the inner wall of one of the fixed rings (13) is provided with a ladder groove (14), and the side wall of the other fixed ring (13) is fixed with a ladder protrusion (15) in sealing contact with the ladder groove (14); The ladder protrusion (15) is a cavity structure, and the inside of the ladder protrusion (15) is injected with a thermal expansion medium (12), the composition of the thermal expansion medium (12) is: Bi 50%, Pb 26.7%, Cd 13.3%, Sn 10%, the melting point of the thermal expansion medium (12) is 70 degrees Celsius, and the thermal expansion coefficient α=35×10 6 / K. the outer wall of the outer sealing ring (16) is fixed with a plurality of circular array rib frames (40), the side wall of the fixed ring (13) is fixed with a plurality of groups of arc-shaped elastic steel plates (21) corresponding in number and position to the rib frames (40), one side of the rib frame (40) is fixed with a fastening bolt (20) through a bolt, and the end of the fastening bolt (20) is in contact with the arch part of the arc-shaped elastic steel plate (21).

2. A split kiln for smelting sludge according to claim 1, characterised in that, When the ladder groove (14) and the ladder protrusion (15) are in contact, the adjacent two kiln bodies (6) and the adjacent fixed rings (13) have a compensation gap.

3. A split kiln for smelting sludge according to claim 1, characterised in that, The outer sealing ring (16) is wrapped around the outer wall of the fixed ring (13), and the opposite inner walls of the two fixed rings (13) are provided with a plurality of blind grooves (19), and the inner wall of the outer sealing ring (16) is provided with a plurality of through grooves (17), and each group of matched through grooves (17) and blind grooves (19) are provided with a transmission column (18).

4. A split kiln for smelting sludge according to claim 1, characterised in that, The support assembly (10) is designed in two symmetrical groups, which comprises a support frame (23) fixed on the top outer wall of the base (9) by a bolt and a support wheel (22) rotatably connected to the inner wall of the support frame (23) and in rolling contact with the ladder groove (14).

5. A split kiln for smelting sludge according to claim 4, characterised in that, The both sides of the support wheel (22) are connected with a shaft sleeve (27) through a connecting shaft (25), the shaft sleeve (27) is rotatably connected to the inner wall of the support frame (23), and the end of the connecting shaft (25) is fixed with an end plate (26) through a bolt, and the end plate (26) is connected to the side wall of the shaft sleeve (27) through a spring (24).

6. A split kiln for smelting sludge according to claim 5, characterised in that, The outer wall of the connecting shaft (25) is provided with a plurality of flat key protrusions (28), and the connecting shaft (25) and the flat key protrusions (28) are in clearance fit with the inner wall of the shaft sleeve (27).

7. A split kiln for smelting sludge as claimed in claim 1, wherein The driving mechanism (4) comprises an outer frame (29), a gear ring (33) and a fixing ring (39), the outer frame (29) is fixed to the top outer wall of the base (1), the gear ring (33) is rotationally connected to the inner wall of the outer frame (29), the fixing ring (39) is fixed to the outer wall of the kiln body (6), and the fixing ring (39) and the gear ring (33) are in driving fit through a plurality of transmission steel plates (30), the bottom inner side of the outer frame (29) is rotationally connected with a worm (35), the bottom inner wall of the outer frame (29) is rotationally connected with a worm wheel (36) engaged with the worm (35), and the gear ring (33) is engaged with the outer wall of the worm wheel (36) through the tooth groove (37) of the outer wall thereof.

8. A split kiln for smelting sludge according to claim 7, characterised in that, The side wall of the fixing ring (39) is provided with a transmission groove (32) matched with the end of the transmission steel plate (30), and the inner wall of the gear ring (33) is provided with an insertion groove (31) in clearance fit with the transmission steel plate (30). The insertion groove (31) is in structure that one end is open and the other end is closed, and the gear ring (33) at the open end of the insertion groove (31) is fixed with a sealing plate (38) for sealing the transmission steel plate (30) through bolts.

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