Inner sleeve building system of upper part of sleeve kiln and sleeve kiln
By using a masonry system consisting of a steel fiber refractory castable layer, a clay castable layer, and a brick support flange in the upper inner sleeve of the sleeve kiln, the problems of easy detachment of refractory bricks and insufficient impact resistance at the bottom in traditional masonry methods have been solved, thus achieving high-precision and long-life operation of the sleeve kiln.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING SHOUGANG CO LTD
- Filing Date
- 2023-07-19
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional methods for constructing the upper inner sleeve of a sleeve kiln have several drawbacks, including difficulty in controlling the precision of refractory brick construction, easy detachment of refractory bricks, weak impact resistance at the bottom of the upper inner sleeve, and insufficient service life. These issues result in the steel inner sleeve losing its protection and posing a risk of collapse.
The upper inner sleeve masonry system of the sleeve kiln is composed of steel fiber refractory castable layer, clay castable layer, inner and outer high temperature resistant layers, and inner and outer support flanges. Through integral casting and zoned load-bearing design, the masonry accuracy and overall strength are improved, the number of refractory bricks is reduced, and the impact resistance of refractory materials is enhanced.
It achieves precision control and verticality requirements for the upper inner sleeve of the sleeve kiln, reduces the risk of refractory material falling off, extends service life, improves production safety and stability, and reduces production costs.
Smart Images
Figure CN116854385B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of refractory material masonry technology for industrial furnaces and kilns, and particularly to a masonry system for the upper inner sleeve of a sleeve kiln and a sleeve kiln. Background Technology
[0002] As an important process equipment for the production of high-quality metallurgical lime, the temperature control of the kiln top is one of the key technologies of the process. It has a significant impact on the preheating of limestone and the energy-saving production of the kiln. The operation of the upper inner sleeve is the key to this technology.
[0003] The traditional construction method for the upper inner sleeve of a sleeve kiln involves layering clay refractory bricks inside, outside, and at the bottom. These bricks' high-temperature resistance protects the steel inner sleeve from damage, ensuring stable and safe production of the sleeve kiln. However, under current technological conditions, this construction method has the following problems:
[0004] 1) The refractory brickwork of the upper inner sleeve, which is more than 3 meters high, is difficult to control in terms of accuracy;
[0005] 2) The strength of the brick-supporting flange at the bottom of the upper inner sleeve is insufficient, which can easily cause the refractory bricks to fall off and lose their protective function for the steel inner sleeve.
[0006] 3) Under the long-term impact load of limestone raw materials, the refractory bricks at the bottom of the upper inner sleeve fall off, and the rigidity of the brick support flange is reduced due to long-term exposure to high temperature environment, which in turn causes a large area of refractory material to fall off.
[0007] 4) The steel inner sleeve is at risk of collapse after losing the protection of refractory materials, and the kiln must be shut down for a long time for masonry repair. Summary of the Invention
[0008] This application provides a lining system for the upper inner sleeve of a sleeve kiln and a sleeve kiln, which solves the technical problems in traditional lining methods, such as the difficulty in controlling the refractory brick laying accuracy, the easy fall off of refractory bricks, the weak impact resistance of the bottom of the upper inner sleeve, and the short service life.
[0009] This application provides a masonry system for the upper inner sleeve of a kiln, including an upper inner sleeve, bottom steel profile, a steel fiber refractory castable layer, a first clay castable layer, an inner high-temperature resistant layer, an outer high-temperature resistant layer, an inner brick-supporting flange, and an outer brick-supporting flange. The bottom steel profile is arranged in a ring and welded to the bottom end of the upper inner sleeve. The steel fiber refractory castable layer is cast from steel fiber refractory castable on the inner circumference of the bottom of the upper inner sleeve and on the outside of the bottom steel profile. The first clay castable layer is cast from clay castable on the outer circumference of the bottom of the upper inner sleeve and on the bottom steel profile. The inner and outer high-temperature resistant layers are respectively set on the inner and outer circumferences of the upper inner sleeve. Both the inner and outer high-temperature resistant layers consist of brick layers made of refractory bricks. The bottom end of the inner high-temperature resistant layer is connected to the top end of the steel fiber refractory castable layer, and the bottom end of the outer high-temperature resistant layer is connected to the top end of the first clay castable layer. The inner and outer brick-supporting flanges are respectively welded to the inner and outer circumferences of the upper inner sleeve. The inner brick-supporting flange is transversely set inside the inner high-temperature resistant layer, and the outer brick-supporting flange is transversely set inside the outer high-temperature resistant layer.
[0010] In some embodiments, the inner high-temperature resistant layer includes a lightweight clay castable layer and a high-density clay brick layer. The lightweight clay castable layer is integrally cast onto the inner circumference of the upper inner sleeve. The high-density clay brick layer is constructed by laying high-density clay bricks on the inner circumference of the lightweight clay castable layer. The bottom ends of both the lightweight clay castable layer and the high-density clay brick layer are connected to the top end of the steel fiber refractory castable layer. The inner brick-supporting flange penetrates the lightweight clay castable layer and extends into the overall cylindrical area of the high-density clay brick layer to bear the weight of the refractory brick portion in the high-density clay brick layer.
[0011] In some embodiments, the outer high-temperature resistant layer includes a diatomaceous earth brick layer and a second clay brick layer. The diatomaceous earth brick layer is constructed by building diatomaceous earth bricks on the outer periphery of the upper inner sleeve, and the second clay brick layer is constructed by building clay bricks on the outer periphery of the diatomaceous earth brick layer. The bottom ends of both the diatomaceous earth brick layer and the second clay brick layer are connected to the top end of the first clay castable layer. The outer support flange is partially arranged inside the diatomaceous earth brick layer, and the other part extends into the overall cylindrical range of the second clay brick layer to bear the weight of the refractory brick portion in the diatomaceous earth brick layer and the second clay brick layer.
[0012] In some embodiments, the upper inner sleeve masonry system of the sleeve kiln also includes a first anchor, which is arranged in the steel fiber refractory castable layer. Some of the first anchors are welded to the upper inner sleeve, and other parts of the first anchors are welded to the bottom steel section.
[0013] In some embodiments, the upper inner sleeve masonry system of the sleeve kiln also includes a second anchor, which is arranged in the lightweight clay castable layer and welded to the upper inner sleeve.
[0014] In some embodiments, the upper inner sleeve masonry system of the sleeve kiln further includes: an inner refractory fiber felt layer filled with refractory fiber felt between the upper inner sleeve and the steel fiber refractory castable layer; and an outer refractory fiber felt layer filled with refractory fiber felt between the upper inner sleeve and the first clay castable layer.
[0015] In some embodiments, the bottom end of the steel fiber refractory castable layer is flush with the bottom end of the first clay castable layer, the inner periphery of the steel fiber refractory castable layer is flush with the inner periphery of the inner high-temperature resistant layer, and the outer periphery of the first clay castable layer is flush with the outer periphery of the outer high-temperature resistant layer.
[0016] In some embodiments, the thickness of the steel fiber refractory castable layer is greater than the thickness of the first clay castable layer, and the top of the steel fiber refractory castable layer is lower than the bottom of the first clay castable layer.
[0017] In some implementations, in the upper inner sleeve masonry system of the sleeve kiln, the gaps between different refractory materials are filled with lightweight refractory mortar.
[0018] A sleeve kiln includes the aforementioned upper inner sleeve masonry system.
[0019] The beneficial effects of this application are as follows: It provides a masonry system for the upper inner sleeve of a kiln, including an upper inner sleeve, bottom steel sections, a steel fiber refractory castable layer, a first clay castable layer, an inner high-temperature resistant layer, an outer high-temperature resistant layer, an inner brick-supporting flange, and an outer brick-supporting flange. The system utilizes a refractory material arrangement where a steel fiber refractory castable layer is cast on the lower inner side of the upper inner sleeve, a first clay castable layer is cast on the lower outer side, an inner high-temperature resistant layer is placed at other locations on the inner side, and an outer high-temperature resistant layer is placed at other locations on the outer side. The inner brick-supporting flange is laterally positioned within the inner high-temperature resistant layer, and the outer brick-supporting flange is laterally positioned outside the outer... Inside the high-temperature resistant layer on the side; in this system, the inner and outer brick-supporting flanges bear part of the weight of the refractory bricks, and the refractory material masonry accuracy of the entire upper inner sleeve is controlled by zones, which is conducive to achieving the verticality accuracy control requirements. Even if part of the refractory material is damaged, the other parts can still continue to work and will not fall off as a whole; multiple integral casting methods are used in this system, which improves the molding performance and overall strength; the number of refractory bricks in this system is reduced, which reduces the risk of refractory material collapse; and long-life safe operation of the refractory material in the upper inner sleeve of the kiln is achieved. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.
[0021] Figure 1 A cross-sectional schematic diagram of the upper inner sleeve masonry system of a sleeve kiln provided in this application;
[0022] Figure 2 for Figure 1 A detailed diagram illustrating the left-side structure.
[0023] Attached diagram labels: 100 - Upper inner sleeve, 200 - Bottom steel section, 300 - Steel fiber refractory castable layer, 400 - First clay castable layer, 500 - Inner high-temperature resistant layer, 510 - Lightweight clay castable layer, 520 - High-density clay brick layer, 600 - Outer high-temperature resistant layer, 610 - Diatomaceous earth brick layer, 620 - Second clay brick layer, 710 - Inner brick support flange, 720 - Outer brick support flange, 810 - First anchor, 820 - Second anchor, 910 - Inner refractory fiber felt layer, 920 - Outer refractory fiber felt layer. Detailed Implementation
[0024] To address the technical problems inherent in traditional refractory bricklaying methods, such as difficulty in controlling the precision of refractory bricklaying, easy refractory brick detachment, weak impact resistance at the bottom of the inner sleeve, and short service life, this embodiment discloses an upper inner sleeve lining system for a sleeve kiln. The aim is to improve the lining precision of the sleeve kiln, extend its operational life after a single lining, reduce production costs due to refractory material detachment requiring maintenance, and mitigate system operational safety risks. Ultimately, this system achieves safe, stable, and efficient control of sleeve kiln production and extends the overhaul cycle of the sleeve kiln. It provides valuable insights for industry professionals and offers significant economic and safety benefits.
[0025] Please refer to Figure 1 This embodiment discloses a masonry system for the upper inner sleeve 100 of a sleeve kiln, which makes an innovative design for the refractory masonry of the inner and outer sides of the upper inner sleeve of the sleeve kiln. It includes the upper inner sleeve 100, bottom steel section 200, steel fiber refractory castable layer 300, first clay castable layer 400, inner high temperature resistant layer 500, outer high temperature resistant layer 600, inner brick support flange 710 and outer brick support flange 720.
[0026] Please refer to Figure 1 , Figure 1 The upper inner sleeve 100 and the bottom steel 200 welded to the bottom end of the upper inner sleeve 100 are shown. The bottom steel 200 is arranged in a ring shape and is arranged along the circumference of the upper inner sleeve 100.
[0027] In this system, the high-temperature resistant material of the upper inner sleeve 100 mainly includes a small portion of the lower casting area and a large area of the high-temperature resistant layer. The high-temperature resistant layer is primarily composed of refractory bricks. Please refer to [reference needed]. Figure 1The upper inner sleeve 100 is divided into inner and outer circumferences. The lower part of the casting area includes a steel fiber refractory castable layer 300 and a first clay castable layer 400. The large-scale high-temperature resistant layer includes an inner high-temperature resistant layer 500 and an outer high-temperature resistant layer 600.
[0028] For details, please refer to Figure 1 The steel fiber refractory castable layer 300 is formed by casting steel fiber refractory castable, specifically cast on the bottom inner circumference of the upper inner sleeve 100. Here, "bottom" refers to a small section extending upwards from the bottom end, and it is also cast outside the bottom steel section 200, covering part of its outer surface. It should be noted that the steel fiber refractory castable layer 300 is preferably continuous and uninterrupted.
[0029] Please refer to Figure 1 The first clay castable layer 400 is formed by casting clay castable, specifically cast on the outer periphery of the bottom of the upper inner sleeve 100. Here, "bottom" refers to a small area from the bottom up, and it is also cast outside the bottom steel section 200, covering part of the outer surface of the bottom steel section 200. The first clay castable layer 400 is preferably continuous and uninterrupted in its entirety.
[0030] Both the steel fiber refractory castable layer 300 and the first clay castable layer 400 are cast outside the bottom steel section 200, with their interface defined by the boundary between the inner and outer sides of the upper inner sleeve 100. Figure 1 The cylindrical surface where the outer periphery of the upper inner sleeve 100 is located is shown as the interface between the two.
[0031] Regarding the pouring method of the steel fiber refractory castable layer 300 and the first clay castable layer 400, they are uniformly and integrally poured into the preset area and cured and hardened for a specified time.
[0032] The beneficial effects of setting up the steel fiber refractory castable layer 300 and the first clay castable layer 400 include: adopting an integral casting method, which improves the molding performance and overall strength; reducing the number of refractory bricks, which to some extent helps to control the accuracy of refractory masonry.
[0033] Regarding the inner high-temperature resistant layer 500 being arranged on the inner circumference of the upper inner sleeve 100, and the outer high-temperature resistant layer 600 being arranged on the outer circumference of the upper inner sleeve 100, these two layers occupy a large area of the upper inner sleeve 100 in the height direction. For example, the height of the upper structure of the sleeve kiln is 9m. Figure 1 The image only shows the structure of a portion of the height area of the upper inner sleeve 100.
[0034] Both the inner high-temperature resistant layer 500 and the outer high-temperature resistant layer 600 include brick layers constructed of refractory bricks, such as... Figure 1As shown, the bottom end of the inner high-temperature resistant layer 500 is connected to the top end of the steel fiber refractory castable layer 300, and the bottom end of the outer high-temperature resistant layer 600 is connected to the top end of the first clay castable layer 400.
[0035] To resolve the technical issues, please refer to... Figure 1 The upper inner sleeve 100 masonry system of the sleeve kiln disclosed in this embodiment includes an inner brick-supporting flange 710 and an outer brick-supporting flange 720. The inner brick-supporting flange 710 is disposed within the geometric range (generally cylindrical) of the inner high-temperature resistant layer 500, and the outer brick-supporting flange 720 is disposed within the geometric range (generally cylindrical) of the outer high-temperature resistant layer 600. Specifically, one end of the inner brick-supporting flange 710 is welded to the inner circumference of the upper inner sleeve 100, and the inner brick-supporting flange 710 is laterally disposed within the contour range of the inner high-temperature resistant layer 500; one end of the outer brick-supporting flange 720 is welded to the outer circumference of the upper inner sleeve 100, and the outer brick-supporting flange 720 is laterally disposed within the contour range of the outer high-temperature resistant layer 600.
[0036] The beneficial effects of setting the inner brick support flange 710 and the outer brick support flange 720 include: being able to bear part of the weight of the refractory bricks, and being able to control the refractory material masonry accuracy of the entire upper inner sleeve 100 in sections, which is conducive to achieving the accuracy control requirements of verticality; in addition, even if part of the refractory material is damaged, the other parts can still continue to work and will not fall off as a whole.
[0037] In some implementation methods, please refer to Figure 1 The inner high-temperature resistant layer 500 includes a lightweight clay castable layer 510 and a high-density clay brick layer 520. The lightweight clay castable layer 510 is integrally cast from lightweight clay castable onto the inner circumference of the upper inner sleeve 100. The high-density clay brick layer 520 is constructed from high-density clay bricks on the inner circumference of the lightweight clay castable layer 510. The bottom ends of both the lightweight clay castable layer 510 and the high-density clay brick layer 520 are connected to the top end of the steel fiber refractory castable layer 300. Under the aforementioned limitations of the brick-supporting flange, such as... Figure 1 As shown, the inner brick-supporting flange 710 penetrates the lightweight clay castable layer 510, and part of the inner brick-supporting flange 710 extends into the overall cylindrical range of the high-density clay brick layer 520, so that the brick-supporting flange, together with the upper inner sleeve 100, can smoothly bear the weight of the refractory brick portion in the high-density clay brick layer 520.
[0038] Regarding the lightweight clay castable layer 510, it is made by integrally casting lightweight clay castable into a preset area and then curing and hardening it for a specified time.
[0039] The beneficial effects of using the lightweight clay castable layer 510 include: reducing the number of refractory bricks, using lightweight refractory materials, reducing the overall weight, and greatly reducing the risk of refractory material collapse; and using an integral casting method in the area of the lightweight clay castable layer 510 inside the upper inner sleeve 100, which improves the molding performance and overall strength.
[0040] In some implementation methods, please refer to Figure 1 The outer high-temperature resistant layer 600 includes a diatomaceous earth brick layer 610 and a second clay brick layer 620. The diatomaceous earth brick layer 610 is constructed of diatomaceous earth bricks on the outer periphery of the upper inner sleeve 100, and the second clay brick layer 620 is constructed of clay bricks on the outer periphery of the diatomaceous earth brick layer 610. The bottom ends of both the diatomaceous earth brick layer 610 and the second clay brick layer 620 are connected to the top end of the first clay castable layer 400. Under the aforementioned limitations of the brick-supporting flange, such as Figure 1 As shown, the outer brick-supporting flange 720 is partially arranged inside the diatomaceous earth brick layer 610, and the other part extends into the overall cylindrical range of the second clay brick layer 620, so that the brick-supporting flange, together with the upper inner sleeve 100, can smoothly bear the weight of the refractory brick portion in the diatomaceous earth brick layer 610 and the second clay brick layer 620.
[0041] In some implementation methods, please refer to Figure 1 The upper inner sleeve 100 masonry system of the sleeve kiln also includes a first anchor 810. The first anchor 810 is arranged in the steel fiber refractory castable layer 300. Some of the first anchors 810 are welded to the upper inner sleeve 100, and the other first anchors 810 are welded to the bottom section steel 200.
[0042] Based on the anchoring function, in some embodiments, the upper inner sleeve 100 masonry system of the sleeve kiln also includes a second anchor 820, which is arranged in the lightweight clay castable layer 510 and welded to the upper inner sleeve 100.
[0043] The beneficial effects of the first anchor 810 and the second anchor 820 mentioned above include: further enhancing the impact resistance of the castable, further extending the service life of the upper inner sleeve 100, and ensuring that the castable still protects the upper inner sleeve 100 even if the refractory brick falls off.
[0044] Regarding the arrangement of the numerous first anchors 810 and second anchors 820 in this system, they can be evenly arranged along the axial direction of the upper inner sleeve 100. The numerous second anchors 820 can also be evenly spaced along the height direction.
[0045] In some implementation methods, please refer to Figure 1The upper inner sleeve 100 masonry system of the sleeve kiln also includes an inner refractory fiber felt layer 910 and an outer refractory fiber felt layer 920, which are uniformly filled on the inner and outer sides of the bottom of the upper inner sleeve 100 using refractory fiber felt.
[0046] Specifically, refractory fiber felt is filled between the upper inner sleeve 100 and the steel fiber refractory castable layer 300, forming an inner refractory fiber felt layer 910. The lower end of the inner refractory fiber felt layer 910 is connected to the bottom profile 200, and the upper end is connected to the inner high-temperature resistant layer 500. In the scheme where the inner high-temperature resistant layer 500 includes a lightweight clay castable layer 510 and a high-density clay brick layer 520, the upper end of the inner refractory fiber felt layer 910 is connected to the lightweight clay castable layer 510. The bottom ends are connected; refractory fiber felt is filled between the upper inner sleeve 100 and the first clay castable layer 400 to form an outer refractory fiber felt layer 920. The lower end of the outer refractory fiber felt layer 920 is connected to the bottom steel section 200, and the upper end is connected to the outer high temperature resistant layer 600. In the scheme where the outer high temperature resistant layer 600 includes a diatomaceous earth brick layer 610 and a second clay brick layer 620, the upper end of the outer refractory fiber felt layer 920 is connected to the bottom end of the diatomaceous earth brick layer 610.
[0047] By arranging refractory fiber felt, the thermal insulation performance is further improved, heat conduction is reduced, and the cooling effect of the steel inner sleeve is further enhanced.
[0048] In some implementation methods, please refer to The bottom end of the steel fiber refractory castable layer 300 is flush with the bottom end of the first clay castable layer 400. The inner periphery of the steel fiber refractory castable layer 300 is flush with the inner periphery of the inner high-temperature resistant layer 500. The outer periphery of the first clay castable layer 400 is flush with the outer periphery of the outer high-temperature resistant layer 600. The upper inner sleeve 100 masonry system of the sleeve kiln is arranged in a cylindrical shape as a whole.
[0049] In some embodiments, the thickness of the steel fiber refractory castable layer 300 is greater than the thickness of the first clay castable layer 400, and the top of the steel fiber refractory castable layer 300 is lower than the bottom of the first clay castable layer 400. The first clay castable layer 400 is clay-based, with good wear resistance and a large contact area and height with the raw materials; the steel fiber refractory castable layer 300 is high-alumina, with good high-temperature resistance but slightly lower wear resistance. In actual operation, only the bottom contacts the raw materials, so the steel fiber refractory castable layer 300 and the first clay castable layer 400 do not need to be set too high. Furthermore, economic considerations are taken into account, as the steel fiber refractory castable is cheaper than the clay castable.
[0050] In some embodiments, in the upper inner sleeve 100 masonry system of the sleeve kiln, the gaps between different refractory materials are filled with lightweight refractory mortar. This includes gaps between different refractory materials, such as between the diatomaceous earth brick layer 610 and the second clay brick layer 620, between the diatomaceous earth brick layer 610 and the first clay castable layer 400, between the lightweight clay castable layer 510 and the high-density clay brick layer 520, and so on.
[0051] This embodiment also protects a sleeve kiln, which includes the above-mentioned upper inner sleeve 100 masonry system of the sleeve kiln, wherein the upper and middle parts of the sleeve kiln are spaced apart from each other, such as spaced 2m apart.
[0052] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0053] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A system for constructing the inner sleeve of an upper part of a sleeve kiln, characterized in that, The upper inner sleeve lining system of the sleeve kiln includes: Upper inner sleeve; The bottom section steel is arranged in a ring and welded to the bottom end of the upper inner sleeve; The steel fiber refractory castable layer and the first clay castable layer are provided. The steel fiber refractory castable layer is cast by steel fiber refractory castable on the bottom inner circumference of the upper inner sleeve and outside the bottom steel section. The first clay castable layer is cast by clay castable on the bottom outer circumference of the upper inner sleeve and outside the bottom steel section. An inner high-temperature resistant layer and an outer high-temperature resistant layer are respectively disposed on the inner and outer circumferential sides of the upper inner sleeve. Both the inner and outer high-temperature resistant layers consist of brick layers constructed of refractory bricks. The bottom end of the inner high-temperature resistant layer connects to the top end of the steel fiber refractory castable layer, and the bottom end of the outer high-temperature resistant layer connects to the top end of the first clay castable layer. The inner brick-supporting flange and the outer brick-supporting flange are respectively welded to the inner and outer circumferences of the upper inner sleeve. The inner brick-supporting flange is transversely arranged in the inner high-temperature resistant layer, and the outer brick-supporting flange is transversely arranged in the outer high-temperature resistant layer. The inner high-temperature resistant layer includes a lightweight clay castable layer and a high-density clay brick layer. The lightweight clay castable layer is integrally cast onto the inner circumference of the upper inner sleeve. The high-density clay brick layer is constructed by building high-density clay bricks onto the inner circumference of the lightweight clay castable layer. The bottom ends of both the lightweight clay castable layer and the high-density clay brick layer are connected to the top end of the steel fiber refractory castable layer. The inner brick-supporting flange penetrates the lightweight clay castable layer, and the inner brick-supporting flange extends into the overall cylindrical area of the high-density clay brick layer to bear the weight of the refractory brick portion in the high-density clay brick layer. The outer high-temperature resistant layer includes a diatomaceous earth brick layer and a second clay brick layer. The diatomaceous earth brick layer is constructed by building diatomaceous earth bricks on the outer periphery of the upper inner sleeve. The second clay brick layer is constructed by building clay bricks on the outer periphery of the diatomaceous earth brick layer. The bottom ends of the diatomaceous earth brick layer and the bottom ends of the second clay brick layer are connected to the top end of the first clay castable layer. The outer supporting flange is partially arranged inside the diatomaceous earth brick layer, and the other part extends into the overall cylindrical range of the second clay brick layer to bear the weight of the refractory brick portion in the diatomaceous earth brick layer and the second clay brick layer.
2. The upper inner sleeve masonry system of the sleeve kiln as described in claim 1, characterized in that, The upper inner sleeve masonry system of the sleeve kiln also includes a first anchor, which is arranged in the steel fiber refractory castable layer. Part of the first anchor is welded to the upper inner sleeve, and the other part of the first anchor is welded to the bottom steel section.
3. The upper inner sleeve masonry system of the sleeve kiln as described in claim 1, characterized in that, The upper inner sleeve masonry system of the sleeve kiln also includes a second anchor, which is arranged in the lightweight clay castable layer and welded to the upper inner sleeve.
4. The upper inner sleeve masonry system of the sleeve kiln as described in claim 1, characterized in that, The upper inner sleeve construction system of the sleeve kiln also includes: The refractory fiber felt is filled in the inner refractory fiber felt layer formed between the upper inner sleeve and the steel fiber refractory castable layer; The refractory fiber felt is filled in the outer refractory fiber felt layer formed between the upper inner sleeve and the first clay castable layer.
5. The upper inner sleeve masonry system of the sleeve kiln as described in claim 1, characterized in that, The bottom end of the steel fiber refractory castable layer is flush with the bottom end of the first clay castable layer, the inner periphery of the steel fiber refractory castable layer is flush with the inner periphery of the inner high-temperature resistant layer, and the outer periphery of the first clay castable layer is flush with the outer periphery of the outer high-temperature resistant layer.
6. The upper inner sleeve masonry system of the sleeve kiln as described in claim 5, characterized in that, The thickness of the steel fiber refractory castable layer is greater than the thickness of the first clay castable layer, and the top of the steel fiber refractory castable layer is lower than the bottom of the first clay castable layer.
7. The upper inner sleeve masonry system of the sleeve kiln as described in any one of claims 1-6, characterized in that, In the upper inner sleeve masonry system of the sleeve kiln, the gaps between different refractory materials are filled with lightweight refractory mortar.
8. A sleeve kiln, characterized in that, The system includes the upper inner sleeve construction system of the sleeve kiln as described in any one of claims 1-7.