Kiln lining building structure

Abstract

The utility model discloses a kiln lining building structure, and belongs to the technical field of kilns, the kiln lining building structure comprises a working layer, the working layer comprises a plurality of first prefabricated bricks and a plurality of second prefabricated bricks, the first prefabricated bricks are solid bricks, the second prefabricated bricks are hollow sphere bricks, the plurality of first prefabricated bricks are built to form a layer of ring, and a plurality of layers of first barrel structures are vertically stacked to form a plurality of layers; a plurality of second prefabricated bricks are built to form a layer of ring and are vertically stacked in multiple layers to form a second barrel structure, the second barrel structure is built on the first barrel structure, and the first barrel structure and the second barrel structure are located on the inner side of the kiln and are spaced from the inner wall of the kiln; and the pouring layer is of a layer structure formed by pouring and curing and is arranged at the interval. The lining can replace an existing lining adopted for overhaul and maintenance, the overhaul period is effectively shortened, and the problem that an existing lining is long in replacement period is solved.

Description

Technical Field

[0001] This application belongs to the field of kiln technology, and in particular relates to a kiln lining construction structure. Background Technology

[0002] Tabular corundum is a pure sintered corundum that undergoes complete shrinkage during firing without any additives such as B2O3. It can be used as a main component in alumina-carbon, alumina-magnesia-carbon, magnesia-alumina-carbon, magnesia-sinite, and alumina-chromium refractory bricks, or as an alumina-enriched component in high-alumina unshaped refractories. It can be widely used in industries such as steel, casting, and ceramics. However, the production of tabular corundum requires a sintering process, which necessitates the use of appropriate kilns.

[0003] Existing corundum kiln linings have long maintenance and construction cycles. For example, a vertical kiln with a kiln lining construction structure (referencing CN200996785) features multiple sintering layers in the middle, each with multiple burners, ensuring the formation of typical microstructure characteristics of high-temperature, rapid-fired corundum. This arrangement allows the firing temperature and holding time to meet process requirements. However, this structure requires a 70-day construction period for a major lining overhaul, including kiln shutdown, material handling, cooling, dismantling, casting and curing, and kiln drying, following normal construction procedures. Therefore, existing kilns suffer from long maintenance and drying cycles, impacting annual corundum kiln capacity and enterprise profits. Utility Model Content

[0004] This application aims to at least partially solve the technical problem of long kiln maintenance cycles. To this end, this application provides a kiln lining construction structure that can replace the existing lining used for maintenance, effectively shorten the maintenance period, and solve the problem of long lining replacement cycles.

[0005] This application provides a kiln lining construction structure, which includes:

[0006] The working layer includes multiple first precast bricks and multiple second precast bricks. The first precast bricks are solid bricks, and the second precast bricks are hollow spherical bricks. Multiple first precast bricks are laid to form a ring, and multiple layers are stacked vertically to form a first cylindrical structure. Multiple second precast bricks are laid to form a ring, and multiple layers are stacked vertically to form a second cylindrical structure. The second cylindrical structure is built on top of the first cylindrical structure. The first cylindrical structure and the second cylindrical structure are located inside the kiln and are spaced apart from the inner wall of the kiln.

[0007] The casting layer is a layer structure formed by casting and curing, and is located at the intervals.

[0008] In some embodiments, the first precast brick is a wedge-shaped corundum brick with wedge-shaped surfaces on both sides, and multiple first precast bricks are laid together by fitting the wedge-shaped surfaces to form a ring.

[0009] In some embodiments, multiple reinforcing ribs are also included, which are spaced apart and embedded in the cast layer.

[0010] In some embodiments, the second cylindrical structure is provided with a slot that divides the second cylindrical structure into upper and lower sections.

[0011] In some embodiments, the casting layer is a ring structure formed by casting corundum, and the ring structure has a casting support section that matches the groove opening.

[0012] In some embodiments, the casting layer also includes a support member disposed in the groove, with both ends of the support member abutting against the upper and lower sections of the second cylindrical structure, respectively.

[0013] In some embodiments, the casting layer further includes a fiber blanket, which is attached to the support and positioned between the support and the casting support section.

[0014] In some embodiments, a skeleton layer is also included, which is used to fix the inner wall of the kiln and is located outside the cast layer. The bottom end of the skeleton layer extends to the corresponding position of the first cylindrical structure and the top end extends to the top end of the second cylindrical structure.

[0015] In some embodiments, a heat insulation layer is also included, which is fixed to the inner wall of the skeleton layer and located on the outside of the cast layer, with the heat insulation layer located at the corresponding position of the second cylinder structure.

[0016] In some embodiments, an insulating layer is also included, which is applied between the insulation layer and the casting layer, and serves to separate the casting layer from the insulation layer.

[0017] As can be seen from the above technical solution, the beneficial effects of this application are as follows:

[0018] This application utilizes first and second precast bricks to construct a multi-layered first and second cylindrical structure within the kiln. Vertically, the first cylindrical structure is located at the bottom, while the second cylindrical structure is built upon it. Both the first and second cylindrical structures employ multi-layered masonry construction. Each layer of the first cylindrical structure is constructed using multiple first precast bricks, and each layer of the second cylindrical structure uses multiple second precast bricks. This creates working layers at intervals along the kiln's inner wall. After forming these working layers, the intervals can be filled by pouring concrete, thus completing the entire lining structure. This approach can replace the existing lining used for maintenance. If any part of the lining is damaged during later use, the corresponding first or second precast brick can be directly replaced, eliminating the need for extensive repairs and effectively shortening the maintenance period. This solves the problem of long lining replacement cycles currently in place. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced one by one below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other embodiments and drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This diagram shows a longitudinal sectional view of an embodiment of the kiln lining construction structure of this utility model;

[0021] Figure 2 It shows Figure 1 Top view diagram of point AA;

[0022] Figure 3 It shows Figure 1 Schematic diagram of longitudinal section at point AA;

[0023] Figure 4 This diagram shows a longitudinal sectional view of an embodiment of the kiln lining construction structure of this utility model;

[0024] Reference numerals: 100, kiln lining structure; 110, working layer; 111, first precast brick; 112, second precast brick; 113, burner brick; 120, casting layer; 121, ring structure; 121a, casting support section; 122, support component; 123, fiber blanket; 130, reinforcing rib; 140, skeleton layer; 150, heat insulation layer; 160, insulation layer; 170, corundum buffer slurry layer; 180, corundum mullite casting layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] This application is described below with reference to the accompanying drawings and specific embodiments:

[0030] Please refer to Figure 1This application provides a kiln lining structure 100, which includes a working layer 110 and a casting layer 120. The working layer 110 is the structure that directly bears the high temperature during production in the kiln. The working layer 110 includes a plurality of first precast bricks 111 and a plurality of second precast bricks 112. The first precast bricks 111 are solid bricks, and the second precast bricks 112 are hollow spherical bricks. In order to improve the high temperature resistance, both the first precast bricks 111 and the second precast bricks 112 are made of high temperature resistant materials. The first precast bricks 111 and the second precast bricks 112 are pre-prepared at the factory and can be used directly during the kiln lining construction. The second precast bricks 112 are built on top of the first precast bricks 111. This is because the ignition port of a typical kiln is located at the bottom, and the fire spreads upward, resulting in a higher temperature at the top of the kiln. The bottom is made of solid bricks, which have a certain load-bearing capacity and can withstand a certain load, while the upper part is made of hollow spherical bricks, which can reduce the heat transfer to the outside and reduce heat loss. Specifically, multiple first precast bricks 111 are laid to form a ring, meaning that in each layer, multiple first precast bricks 111 are laid in a ring and stacked vertically in multiple layers to form a first cylindrical structure. Multiple second precast bricks 112 are laid to form a ring and stacked vertically in multiple layers to form a second cylindrical structure. Similarly, following the structure formed by the first precast bricks 111, both the first and second cylindrical structures are cylindrical. The second cylindrical structure is built on top of the first cylindrical structure, and multiple second precast bricks 112 are then laid on top of the first cylindrical structure. The first and second cylindrical structures are located inside the kiln and are spaced from the kiln's inner wall, thus providing space for casting between the working layer 110 and the kiln's inner wall. The casting layer 120 is a layer structure formed by casting and solidification, located at the intervals. The casting material can be high-temperature resistant corundum casting material, thus forming a corundum casting layer 120.

[0031] The existing technology for corundum kiln linings involves a long maintenance and reconstruction cycle. Corundum is a superior high-temperature resistant material, capable of withstanding temperatures close to 2000℃. Therefore, high-temperature resistant kilns are required for corundum production. After the kiln is in use, the combustion chamber in the middle of the kiln is at a high temperature, making the lining prone to damage, such as cracks, collapses, and breaks. These issues will affect corundum production, so timely maintenance or replacement is necessary to ensure production quality and safety. However, the maintenance of the kiln lining requires replacement or reconstruction, which takes a long time and seriously affects corundum production. This is because kilns are generally large in volume, and conventional masonry cannot meet the requirements for corundum production. The existing masonry uses corundum material to form the lining. Since corundum contains moisture, this structure must be dried, generally at a temperature of 500℃ to 700℃. Drying the kiln takes about a month. On the other hand, when the lining needs to be replaced, it takes about 20 days to completely dismantle the original lining. The existing masonry construction requires a part to be done during the day, and after it solidifies at night, the construction continues the next day. This means that rebuilding takes about a week. In addition, the kiln needs to be started and dried, which requires a long period of time.

[0032] This application uses first precast bricks 111 and second precast bricks 112 to form a multi-layered first and second cylindrical structure within the kiln. Vertically, the first cylindrical structure is located at the bottom, while the second cylindrical structure is built on top of the first cylindrical structure. Both the first and second cylindrical structures are multi-layered masonry structures. Each layer of the first cylindrical structure is constructed using multiple first precast bricks 111, and each layer of the second cylindrical structure is constructed using multiple second precast bricks 112. This creates a working layer 110 at the intervals on the kiln's inner wall. After the working layer 110 is formed, the intervals can be filled by pouring concrete, thus completing the entire inner lining structure. This can replace the existing inner lining used for maintenance. If the inner lining is damaged in a certain area during later use, the corresponding first precast brick 111 or second precast brick 112 can be directly replaced, eliminating the need for extensive repairs, effectively shortening the maintenance period, and solving the problem of long replacement cycles for the current inner lining. Based on the on-site construction conditions, this application offers the following advantages: It enhances the strength of the lining structure, reducing the impact of the kiln drying process on the refractory bricks; it also extends service life, allowing for the retention of the lining during the next high-temperature section replacement, thus reducing material costs; and it reduces downtime. In total, it saves 40% of the construction period, reducing downtime losses; it reduces kiln drying costs by 50%; it reduces the construction cycle by 30%, saving construction costs; it has low implementation costs and stable production indicators; it shortens the lining replacement cycle and extends the operating cycle; and it shortens the construction period and kiln drying time.

[0033] In some embodiments, both the first precast brick 111 and the second precast brick 112 are formed in the factory. After the precast bricks are poured, vibrated, and demolded, they are thoroughly mixed, vibrated, cured indoors, and dried. The precast bricks achieve the effect of refractory bricks. Their pouring, curing, and pre-drying are carried out at the factory, thereby shortening the construction time of the lining and the kiln drying time. The first precast brick 111 is a wedge-shaped corundum brick. Both sides of the first precast brick 111 are wedge-shaped surfaces. Multiple first precast bricks 111 are laid together by fitting the wedge-shaped surfaces to form a ring. If the second precast brick 112 is an alumina hollow spherical brick, the second precast brick 112 also adopts a wedge-shaped brick structure. The first precast brick 111 and the second precast brick 112 can both adopt the same structure and shape, only differing in material, composition or internal structure. The first precast brick 111 and the second precast brick 112 have the same structure. The first precast brick 111 will be described below. The second precast brick 112 has the same structure. Since the first precast brick 111 can be arranged in a ring, each first precast brick 111 is part of the ring. The top and bottom of the first precast brick 111 are horizontal flat surfaces. One end of the first precast brick 111 is narrower and serves as the inner side of the ring. The other end of the second precast brick 112 is wider and serves as the outer side of the ring. The two sides of the first precast brick 111 are wedge-shaped surfaces, thus forming a wedge-shaped structure. Multiple first precast bricks 111 are spliced ​​together by the wedge-shaped surfaces to form a circle.

[0034] Please refer to Figure 2 In some embodiments, the kiln lining structure 100 also includes a plurality of reinforcing ribs 130. The plurality of reinforcing ribs 130 are arranged at intervals and embedded in the casting layer 120. As shown in the figure, six reinforcing ribs 130 are arranged at intervals around the outer side of the second cylinder structure in the casting layer 120. The reinforcing ribs 130 are plate-shaped, such as triangular plates. One end of the reinforcing ribs 130 extends to the inner wall of the kiln or other structures of the inner wall of the kiln, and the other end extends to the outer wall of the second cylinder structure. In this way, multiple support structures are formed in the casting layer 120. The use of reinforcing ribs 130 improves the structural strength of the casting layer and makes the kiln lining structure more stable.

[0035] Please refer to Figure 3In some embodiments, the second cylindrical structure is provided with a slot, which divides the second cylindrical structure into upper and lower sections. The slot is located at the middle of the vertical direction of the second cylindrical structure. Due to the setting of the slot, the inner and outer sides of the second cylindrical structure are connected. During casting, the casting material can also be poured into the gap through the slot. The slot is set because the upper part of the kiln has a higher temperature and is the highest temperature area of ​​the entire kiln. It is easy for it to burn out. The slot is set at this place to provide a certain transition and prevent the inner lining from burning out directly. In some embodiments, the casting layer 120 is a ring structure 121 formed by corundum casting, that is, the entire casting layer 120 extends from the bottom of the first precast brick 111 to the top of the second precast brick 112, thus forming a ring structure. The ring structure 121 has a casting support section 121a, which is formed by protruding inward from the upper part of the casting layer. The casting support section 121a matches the groove, that is, the groove is filled by the casting support section 121a. The casting support section 121a using corundum casting material can better withstand the high temperature in the kiln and increase the stability at that point.

[0036] Please refer to Figure 3 In some embodiments, the casting layer 120 further includes a support member 122, which is disposed within the groove. The support member 122 is made of a hard, high-temperature resistant material, such as a high-temperature resistant tungsten-molybdenum alloy. The support member 122 may be annular, with both ends abutting against the upper and lower sections of the second cylindrical structure, respectively. Both ends of the support member 122 can be fixed in place, providing support between the two sections of the second cylindrical structure. In some embodiments, the support member 122 is bent, for example, the support member 122 is divided into three sections in cross-section, with horizontal sections at both ends and a vertical section connecting them in the middle. Thus, both ends of the support member 122 have contact surfaces for abutting, which are the surfaces of the horizontal sections. This ensures that both ends of the support member 122 are in contact with and fixed to the second cylindrical structure. The support member 122 may also be a support brick, providing support. In some embodiments, the casting layer 120 further includes a fiber blanket 123, which is made of high-temperature resistant fiber, such as zirconium oxide or graphite fiber. The fiber blanket 123 is attached to the support member 122. For example, the fiber blanket 123 is annular and is attached to the horizontal section of one end of the support member 122. The fiber blanket 123 is located between the support member 122 and the casting support section 121a. The fiber blanket 123 is used because the coefficient of thermal expansion of the metal is different from that of the casting material. The support member 122 and the casting support section 121a at the groove position have inconsistent thermal deformation at high temperature, and the fiber blanket 123 can play a buffering role.

[0037] Please refer to Figure 4In some embodiments, the kiln lining structure 100 further includes a skeleton layer 140. The skeleton layer 140 is used to fix the inner wall of the kiln and is located outside the cast-in-place layer 120. The bottom end of the skeleton layer 140 extends to the corresponding position of the first cylindrical structure, and the top end extends to the top end of the second cylindrical structure. As shown in the figure, the skeleton layer 140 adopts a cylindrical structure and is made of round steel. It can adopt a layered structure, as long as the whole forms a cylindrical structure. For example, if the skeleton layer 140 is made of round steel, the outer wall of the round steel matches the inner wall of the kiln. Then, anchors, such as rivets, are used to fix the round steel to the inner wall of the kiln. The bottom end of the skeleton layer 140 is located below 1 / 2 of the height of the entire kiln. The bottom end of the skeleton layer 140 corresponds to the first precast brick 111 of the first cylinder structure. The top end of the skeleton layer 140 extends all the way to the top end of the second cylinder structure. Since the height of the entire cast layer 120 is relatively high, basically equivalent to the height of the kiln, the skeleton layer 140 can play a certain supporting role on the outside of the cast layer 120 during casting, maintaining the structure of the entire cast layer 120.

[0038] Please refer to Figure 4 In some embodiments, the kiln lining structure 100 also includes a heat insulation layer 150, which is fixed to the inner wall of the skeleton layer 140. The heat insulation layer 150 can also be fixed to the inner wall of the skeleton layer 140 using anchors. The heat insulation layer 150 is also cylindrical, with its outer wall fitting against the inner wall of the skeleton layer 140. The heat insulation layer 150 is made of high-temperature resistant material, such as corundum brick, which can be a prefabricated brick structure. The heat insulation layer 150 is located outside the cast layer 120, i.e., the cast layer 120 rests against the inner wall of the heat insulation layer 150. The heat insulation layer 150 is located at the corresponding position of the second cylindrical structure. The top of the heat insulation layer 150 extends to the corresponding top of the second cylindrical structure, and its bottom corresponds to the bottom of the second cylindrical structure. The heat insulation layer 150 is provided because the upper part of the kiln has a higher temperature, and the heat insulation layer 150 can provide a certain degree of insulation against the high temperature inside the kiln. In some embodiments, the kiln lining structure 100 further includes an insulating layer 160, which is cylindrical in shape and its dimensions match the inner wall dimensions of the insulation layer 150. If the insulating layer 160 is made of fiber paper, it is attached between the insulation layer 150 and the casting layer 120. The insulating layer 160 is used for separation between the casting layer 120 and the insulation layer 150. With the insulating layer 160, the casting layer 120 can be easily separated from the insulation layer 150 when it is peeled off.

[0039] In some embodiments, the system also includes a corundum buffer slurry layer 170, a burner brick 113, and a corundum mullite casting layer 180. The corundum buffer slurry layer 170 is constructed in the early stage and is located at the bottom of the first precast brick 111 for easy construction. The burner brick 113 is located in the middle of the kiln, specifically between the first precast brick 111 and the second precast brick 112, that is, between the first cylinder structure and the second cylinder structure. The burner brick 113 is an existing structure. The burner brick 113 is located at this position because it corresponds to the combustion chamber and the corresponding position of the combustion device during combustion. The burner brick 113 can ensure efficient combustion production. The corundum mullite casting layer 180 is a ring structure formed by casting corundum mullite material on top of the insulation layer 150 and the skeleton layer 140, which can improve the structural stability of the kiln lining.

[0040] The construction process for this application is as follows:

[0041] (1) Referring to the original dimensions of the corundum bricks in the vertical kiln, corundum wedge-shaped precast bricks were modified and precast at the factory to form the first precast brick 111 and the second precast brick 112. Referring to the original dimensions of the corundum bricks in the lower part of the vertical kiln, the vertical wedge-shaped bricks were 300*(79 / 52)*200mm. Now, the design is to use corundum wedge-shaped precast bricks of 300*(160 / 106)*199mm. After the precast bricks were cast, vibrated, and demolded, they were naturally cured for 7 days and then dried in a medium-temperature furnace at 500 degrees Celsius. Then, the construction was carried out according to the structural design drawing of the kiln lining masonry structure 100.

[0042] (2) Multiple control measures were taken for risk points: grooves (on all four sides) were added at 2 / 3 of the position of the precast bricks to ensure the stability of the masonry structure and prevent cross-contamination of powder and flame. Precast bricks with holes (Φ30mm) were built at the temperature and pressure measuring holes of the kiln body, and corundum castable was used to level the top and bottom.

[0043] (3) Burner brick section: In order to ensure the stability of the burner brick position, the corundum precast brick is laid close to the bottom of the burner brick, with a height of about 100-200mm. The corundum castable is poured as a whole to form an integral foundation to ensure that the 12 burner bricks are subjected to the same force.

[0044] (4) Low-temperature section: 2.1m down from the top of the kiln. This section has a low temperature, less material wear, and a long operating time. Heat-resistant steel triangular ribs (400*500mm, δ=20mm, 8 pieces, material 310S) and brick support plates (Φ1800 / Φ1600, δ=20mm, material 310S) are installed at the 2.1m position. Corundum castable is poured at the brick support plate area to ensure flatness. Expansion joints are left at the brick support plate area.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," "optional example," or "optional implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0046] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0047] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A kiln lining construction structure, characterized in that, include: The working layer (110) includes multiple first precast bricks (111) and multiple second precast bricks (112). The first precast bricks (111) are solid bricks, and the second precast bricks (112) are hollow spherical bricks. Multiple first precast bricks (111) are built to form a ring, and multiple layers are stacked vertically to form a first cylindrical structure. Multiple second precast bricks (112) are built to form a ring, and multiple layers are stacked vertically to form a second cylindrical structure. The second cylindrical structure is built on top of the first cylindrical structure. The first cylindrical structure and the second cylindrical structure are located inside the kiln and are spaced apart from the inner wall of the kiln. The casting layer (120) is a layer structure formed by casting and curing, and is located at the interval.

2. The kiln lining construction structure according to claim 1, characterized in that, The first precast brick (111) is a wedge-shaped corundum brick. Both sides of the first precast brick (111) are wedge-shaped surfaces. Multiple first precast bricks (111) are laid together by fitting the wedge-shaped surfaces to form a ring.

3. The kiln lining construction structure according to claim 1, characterized in that, It also includes multiple reinforcing ribs (130), which are arranged at intervals and embedded in the cast layer (120).

4. The kiln lining construction structure according to claim 1, characterized in that, The second cylindrical structure is provided with a slot, which divides the second cylindrical structure into upper and lower sections.

5. The kiln lining construction structure according to claim 4, characterized in that, The casting layer (120) is a ring structure (121) formed by casting corundum. The ring structure (121) has a casting support section (121a) that matches the groove.

6. The kiln lining construction structure according to claim 5, characterized in that, The casting layer (120) also includes a support member (122), which is located in the groove and whose two ends are respectively in contact with the upper and lower sections of the second cylindrical structure.

7. The kiln lining construction structure according to claim 6, characterized in that, The casting layer (120) also includes a fiber blanket (123), which is attached to the support member (122) so that the fiber blanket (123) is located between the support member (122) and the casting support section (121a).

8. The kiln lining construction structure according to any one of claims 1-7, characterized in that, It also includes a skeleton layer (140), which is used to fix the inner wall of the kiln and is located outside the casting layer (120). The bottom end of the skeleton layer (140) extends to the corresponding position of the first cylindrical structure and the top end extends to the top end of the second cylindrical structure.

9. The kiln lining construction structure according to claim 8, characterized in that, It also includes a heat insulation layer (150), which is fixed to the inner wall of the skeleton layer (140) and located on the outside of the casting layer (120). The heat insulation layer (150) is located at the corresponding position of the second cylindrical structure.

10. The kiln lining construction structure according to claim 9, characterized in that, It also includes an insulating layer (160) that is attached between the heat insulation layer (150) and the casting layer (120) and is used for separation between the casting layer (120) and the heat insulation layer (150).

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