A kiln lining structure adapted for an inline heated rotary kiln

Abstract

This invention discloses a kiln lining structure adapted for an embedded heating rotary kiln, belonging to the field of rotary kilns. It includes a support ring structure and a ceramic ring structure, with the ceramic ring structure adhered to the inner ring surface of the support ring structure. This invention employs an embedded heating rotary kiln, setting the kiln lining structure as a spliced ​​support ring structure and a spliced ​​ceramic sheet structure. The two spliced ​​ring structures are adhered together, with the ceramic sheets connected by interlocking snaps. This solves the problem of thermal expansion mismatch between the ceramic sheet structure and the support ring structure under high-temperature operating conditions. The thickness of the assembled ceramic sheets can also be adjusted as needed, providing possibilities for thinner designs. Furthermore, the support ring structure uses a modular support body with directly built-in insulation material and heating elements. This modular splicing reduces manufacturing difficulty and cost, lowers operating costs, simplifies the manufacturing process, and creates conditions for larger rotary kilns. Additionally, the heating elements are closer to the ceramic sheets, improving their heat transfer efficiency.

Description

Technical Field

[0001] This invention belongs to the field of rotary kilns, and specifically relates to a kiln lining structure adapted to an embedded heating rotary kiln. Background Technology

[0002] A rotary kiln is a type of equipment that uses a rotating cylindrical device to mechanically, physically, or chemically process solid materials. It is widely used in many production industries, including building materials, metallurgy, chemicals, and environmental protection.

[0003] Energy crisis and energy security are severe challenges facing countries worldwide. Improving energy structure and developing clean energy are important themes in global development. Lithium-ion batteries, due to their advantages such as high voltage, high specific energy, good cycle performance, and low environmental pollution, have become an important direction for the development of the new energy industry in various countries. Sintering process is one of the most crucial links in this process. In existing technologies, the rotary kilns used are typically complex external heating systems with significant heat loss and low heating efficiency. Although internal heating methods exist, such as the ceramic rotary experimental furnace for lithium battery materials (publication number CN 209991776 U), the kiln lining structure is independently integrated for each layer, making manufacturing difficult and challenging for large and ultra-large rotary kilns. Summary of the Invention

[0004] This invention provides a kiln lining structure adapted to an embedded heating rotary kiln. The support body integrates insulation material and heating material into a module, which is then assembled into a ring. The working layer is assembled using ceramic pieces that correspond one-to-one with the support body. The ceramic pieces have their own lifting structure. This modular assembly structure reduces the manufacturing difficulty and provides conditions for the large-scale development of rotary kilns.

[0005] The technical solution adopted in this invention is as follows: A kiln lining structure adapted for an embedded heating rotary kiln includes a support ring structure and a ceramic ring structure, with the ceramic ring structure adhered to the inner ring surface of the support ring structure. The support ring structure includes several fan-shaped first support bodies, each first support body being spliced ​​end-to-end into a ring shape, and a ceramic insulation layer filling the splicing surfaces of adjacent first support bodies. The ceramic ring structure includes several fan-shaped ceramic sheets, each ceramic sheet being spliced ​​end-to-end into a ring shape, and a material lifting structure provided on the inner arc surface of each ceramic sheet. The ceramic sheets are bonded to the first support bodies one-to-one. Each first support body includes a first high thermal conductivity insulating substrate, a first heat insulation material body, a first anchor, and a first heating element. The first high thermal conductivity insulating substrate is fan-shaped, and the first heat insulation material body, the first anchor, and the first heating element are all disposed within the first high thermal conductivity insulating substrate, with the first heating element close to the ceramic sheet. The two ends of the first anchor are exposed on the outer arc surface of the first high thermal conductivity insulating substrate. The inner cavity of the ceramic ring structure serves as the heating working chamber. The outer circumference of the ceramic ring structure is bonded to the inner circumference of the support ring structure using fire clay or putty. Each ceramic sheet corresponds one-to-one with the first support body. This modular structure reduces manufacturing difficulty, creating conditions for large-scale rotary kilns. Furthermore, the thickness of the ceramic sheets can be controlled according to process requirements, improving heat transfer efficiency. The support ring structure only requires the first support body to be spliced ​​end-to-end. The first support body integrates the insulation material and heating elements, allowing it to rotate together with the rotary kiln shell after assembly, preventing displacement during operation. The end of the first anchor serves as the welding assembly point to the kiln shell, securely welding the assembled kiln lining structure into the shell.

[0006] In a preferred embodiment of the present invention, a first thermal insulation material body and a first heating element extend axially within a first high thermal conductivity insulating substrate. The first heating element is located near the inner arc surface of the first high thermal conductivity insulating substrate, and the first thermal insulation material body is located near the outer arc surface of the first high thermal conductivity insulating substrate. A plurality of first anchors are spaced apart along the axial direction of the first high thermal conductivity insulating substrate. The anchoring body of each first anchor is located between the first heating element and the first thermal insulation material body, and the two exposed ends of the first anchor are positioned on either side of the first thermal insulation material body. The two exposed ends of the first anchors serve as welding points to the inner wall of the rotary kiln cylinder, welding the integrated support body (combining the heating element and thermal insulation material) to the cylinder to ensure synchronous rotation between the support body and the rotary kiln cylinder, thereby preventing misalignment of the heating element, support body, and cylinder during operation.

[0007] As a preferred embodiment of the present invention, the thickness of the first thermal insulation material body is 1 / 3 of the thickness of the first high thermal conductivity insulating substrate.

[0008] As a preferred embodiment of the present invention, the outer end face of the first thermal insulation material body and the outer arc surface of the first high thermal conductivity insulating substrate are on the same arc surface.

[0009] The present invention also provides a kiln lining structure adapted to an embedded heating rotary kiln. The support ring structure includes several fan-shaped first support bodies and several fan-shaped second support bodies. The first support bodies and the second support bodies form a splicing unit, and adjacent splicing units are spliced ​​end to end in sequence. A ceramic heat insulation layer is filled between the splicing surfaces of the first support bodies and the second support bodies. Each first support body and each second support body corresponds to a ceramic sheet. Each of the first supports includes a first high thermal conductivity insulating substrate, a first thermal insulation material body, a first anchor, and a first heating element; the first high thermal conductivity insulating substrate is fan-shaped, and the first thermal insulation material body, the first anchor, and the first heating element are all disposed within the first high thermal conductivity insulating substrate; and the two ends of the first anchor protrude from the outer arc surface of the first high thermal conductivity insulating substrate. Each of the second supports includes a second high thermal conductivity insulating substrate, a second thermal insulation material body, and a second anchor; the second high thermal conductivity insulating substrate is fan-shaped, and the second thermal insulation material body and the second anchor are both disposed within the second high thermal conductivity insulating substrate; and the two ends of the second anchor protrude from the outer arc surface of the second high thermal conductivity insulating substrate.

[0010] As a preferred embodiment of the present invention, the first heating element is located near the inner arc surface of the first high thermal conductivity insulating substrate, and the first thermal insulation material body is located near the outer arc surface of the first high thermal conductivity insulating substrate; the anchoring body of the first anchor is located between the first heating element and the first thermal insulation material body, and the two exposed ends of the first anchor are arranged on both sides of the first thermal insulation material body. The second thermal insulation material body is located near the outer arc surface of the second high thermal conductivity insulating substrate; the anchoring body of the second anchor wraps around the second thermal insulation material body, and the two exposed ends of the second anchor are located on both sides of the second thermal insulation material body.

[0011] As a preferred embodiment of the present invention, the thickness of the first thermal insulation material body is 1 / 3 of the thickness of the first high thermal conductivity insulating substrate; the thickness of the second thermal insulation material body is 1 / 3 of the thickness of the second high thermal conductivity insulating substrate.

[0012] In a preferred embodiment of the present invention, the outer end face of the first thermal insulation material body and the outer arc surface of the first high thermal conductivity insulating substrate are on the same arc surface; the outer end face of the second thermal insulation material body and the outer arc surface of the second high thermal conductivity insulating substrate are on the same arc surface.

[0013] In a preferred embodiment of the present invention, the first anchor and / or the second anchor includes a first exposed end, an anchoring body, and a second exposed end. The first or second thermal insulation material body is located within the area enclosed by the anchoring body. The anchoring body has a first inclined section, a straight section, and a second inclined section. The first inclined section is connected to the first exposed end, the straight section connects the first and second inclined sections, and the second inclined section is connected to the second exposed end. The straight section is located at 1 / 2 the thickness of the first or second high thermal conductivity insulating substrate. The outer arc surfaces of both the first and second exposed ends are on the same arc surface as the corresponding outer arc surface of the high thermal conductivity insulating substrate.

[0014] As a preferred embodiment of the present invention, the ceramic heat insulation layer is ceramic fiber paper or ceramic fiber blanket.

[0015] In a preferred embodiment of the present invention, the center line of the feeding line on each ceramic sheet coincides with the center line of the corresponding first or second support. This ensures that the ceramic sheet does not crack and that lithium battery material does not easily enter the support ring structure.

[0016] In a preferred embodiment of the present invention, the ceramic sheets are joined end-to-end using a snap-fit ​​connection. This snap-fit ​​connection solves the problem of thermal expansion mismatch with the support ring structure.

[0017] In a preferred embodiment of the present invention, the ceramic sheet includes a ceramic sheet body, with a protrusion at one end and a groove at the other end; the protrusion engages with the groove of an adjacent ceramic sheet body; the groove engages with the protrusion of another adjacent ceramic sheet body. The outer arc surface of the protrusion is on the same arc surface as the outer arc surface of the ceramic sheet body; the inner arc surface of the protrusion is lower than the inner arc surface of the ceramic sheet body; the groove is located at the end of the ceramic sheet body near the lifting structure, and the end face of the lifting structure away from the protrusion is on the same plane as the end face of the ceramic sheet body where the groove is located.

[0018] This invention transforms a traditional externally heated rotary kiln into an internally heated rotary kiln. The kiln lining structure is designed as a combination of a support ring structure and a ceramic sheet structure. The two ring structures are glued together, and the ceramic sheets are joined using interlocking fasteners. This solves the problem of thermal expansion mismatch between the ceramic sheet structure and the support ring structure under high-temperature operating conditions. The thickness of the assembled ceramic sheets can also be adjusted as needed, enabling thinner and lighter designs. Furthermore, the support ring structure uses a modular support body with directly built-in insulation material and heating elements. This modular design reduces manufacturing difficulty and cost, allows for the production of the required inner diameter dimensions, lowers operating costs, simplifies the manufacturing process, and creates conditions for larger rotary kilns. Additionally, the heating elements are closer to the ceramic sheets, improving heat transfer efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention.

[0021] Figure 2 This is a cross-sectional schematic diagram of the support ring structure of the present invention.

[0022] Figure 3 This is a cross-sectional schematic diagram of the first support body of the present invention.

[0023] Figure 4 This is a cross-sectional schematic diagram of the second support body of the present invention.

[0024] Figure 5 This is a cross-sectional schematic diagram of the ceramic ring structure of the present invention.

[0025] Figure 6 This is a cross-sectional schematic diagram of the ceramic sheet of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0027] A kiln lining structure adapted for embedded heating rotary kilns, such as Figure 1 As shown, it includes a support ring structure and a ceramic ring structure. The ceramic ring structure is pasted on the inner ring surface of the support ring structure. The inner cavity of the ceramic ring structure serves as a heating working chamber. The outer circumferential surface of the ceramic ring structure is bonded to the inner circumferential surface of the support ring structure using fire putty or adhesive.

[0028] In this embodiment, the support ring structure includes several fan-shaped first support bodies and several fan-shaped second support bodies. In this embodiment, the support ring structure is composed of only the fan-shaped first support bodies and fan-shaped second support bodies spliced ​​together. Taking three first support bodies and three second support bodies as an example, the first support bodies and the second support bodies constitute a splicing unit, and adjacent splicing units are spliced ​​end to end in sequence. Whether it is the same splicing unit or adjacent splicing units, the splicing surface of the first support body and the second support body is filled with a ceramic heat insulation layer. The ceramic heat insulation layer used can be ceramic fiber paper or ceramic fiber blanket.

[0029] like Figure 2 and 3 As shown, the first support body is directly integrally formed. Each of the first support bodies includes a first high thermal conductivity insulating substrate 11, a first thermal insulation material body 12, a first anchor 13, and a first heating element 14. The first high thermal conductivity insulating substrate 11 is fan-shaped. The first thermal insulation material body 12, the first anchor 13, and the first heating element 14 are all disposed within the first high thermal conductivity insulating substrate 11. Furthermore, both ends of the first anchor 13 are exposed outside the first high thermal conductivity insulating substrate 11. Specifically, the first heating element 14 is located near the inner arc surface of the first high thermal conductivity insulating substrate 11, that is, closer to the ceramic sheet. The first heating element is an electric heating element. The first insulation material body 12 is located near the outer arc surface of the first high thermal conductivity insulating substrate 11. In this example, the outer end face of the first insulation material body 12 is on the same arc surface as the outer arc surface of the first high thermal conductivity insulating substrate 11, and with the radial direction of the support ring structure as the thickness direction, the thickness of the first insulation material body 12 is 1 / 3 of the thickness of the first high thermal conductivity insulating substrate 11.

[0030] The first heating element 14 and the first thermal insulation material body 12 both extend along the axial direction of the support ring structure within the first high thermal conductivity insulating substrate.

[0031] The first anchor 13 is provided at intervals along the axial direction of the support ring structure. The anchoring body of each first anchor 13 is located between the first heating element 14 and the first thermal insulation material body 12, and the first thermal insulation material body 12 is located within the area surrounded by the anchoring body 32.

[0032] The first anchor 13 includes a first exposed end 31, an anchoring body 32, and a second exposed end 33. The anchoring body 32 has a first inclined section 321, a straight section 322, and a second inclined section 323. The first lower end of the anchoring body 32 is the lower end of the first inclined section 321, which is connected to the first exposed end 31. The straight section 322 connects the first inclined section 321 and the second inclined section 323. The second lower end of the anchoring body 32 is the lower end of the second inclined section, which is connected to the second exposed end 33. The straight section 322 is located at half the thickness of the first high thermal conductivity insulating substrate 11 or the second high thermal conductivity insulating substrate 21. The first exposed end 31 and the second exposed end 33 are located on both sides of the first thermal insulation material body 12, and the outer arc surfaces of the first exposed end 31 and the second exposed end 33 are on the same arc surface as the corresponding high thermal conductivity insulating substrate.

[0033] The first support body, without the first heating element, becomes the second support body. Figure 2 and 4 As shown, each of the second supports includes a second high thermal conductivity insulating substrate 21, a second thermal insulation material body 22, and a second anchor 23. The second high thermal conductivity insulating substrate 21 is fan-shaped, and both the second thermal insulation material body 22 and the second anchor 23 are disposed within the second high thermal conductivity insulating substrate 21. Both ends of the second anchor 23 protrude from the second high thermal conductivity insulating substrate 21. The second thermal insulation material body 22 is located near the outer arc surface of the second high thermal conductivity insulating substrate 21. Preferably, the outer end face of the second thermal insulation material body 22 is on the same arc surface as the outer arc surface of the second high thermal conductivity insulating substrate 21, and the thickness of the second thermal insulation material body 22 is 1 / 3 of the thickness of the second high thermal conductivity insulating substrate 21.

[0034] The anchoring body of the second anchor 23 wraps around the second insulation material body 22, and the two exposed ends of the second anchor 23 are located on both sides of the second insulation material body 22. The second anchor 23 has the same structure as the first anchor.

[0035] The support ring structure is formed by alternating fan-shaped first support bodies and fan-shaped second support bodies. Each first support body integrates the first heating element and the first insulation material body directly into the first high thermal conductivity insulating substrate. The second support body integrates the insulation material body and the anchor directly into the second high thermal conductivity insulating substrate.

[0036] The first high thermal conductivity insulating substrate 11 and the second high thermal conductivity insulating substrate 21 are made of high thermal conductivity insulating material or a combination of high thermal conductivity material and insulating material. The high thermal conductivity material is often a conductive material.

[0037] The ceramic ring structure, such as Figure 5 and 6As shown, the structure includes several annular ceramic sheets 4, which are joined end-to-end to form a ring. Each ceramic sheet 4 has a lifting structure 5 on its inner arc surface. The ceramic sheets 4 are bonded to a first support and a second support in a one-to-one correspondence. In this embodiment, there are six ceramic sheets. Furthermore, the center line of the lifting line on each ceramic sheet 4 coincides with the center line of the corresponding first or second support. This ensures that the ceramic sheets do not crack and that lithium battery materials do not easily enter the support ring structure.

[0038] In this embodiment, each ceramic sheet 4 is spliced ​​end to end using a snap-fit ​​connection. This snap-fit ​​connection solves the problem of thermal expansion mismatch with the support ring structure.

[0039] Specifically, such as Figure 6 As shown, the ceramic sheet 4 includes a ceramic sheet body 41. A protrusion 42 is provided at one end of the ceramic sheet body 41, and the outer arc surface of the protrusion 42 is on the same arc surface as the outer arc surface of the ceramic sheet body 41. The inner arc surface of the protrusion 42 is lower than the inner arc surface of the ceramic sheet body 41. A groove 43 is provided at the other end of the ceramic sheet body 41, located near the lifting structure 5. In this example, the side end face of the lifting structure 5 away from the protrusion is on the same plane as the side end face of the ceramic sheet body 41 where the groove is located. Furthermore, the thickness of the lifting structure is greater than the thickness of the ceramic sheet body 41. The lifting structure extends axially along the ceramic ring structure on the ceramic sheet body 41. In this embodiment, the ceramic sheet body 41, the protrusion 42, the groove 43, and the lifting structure 5 are directly integrally formed into a ceramic sheet.

[0040] The protrusion 42 of the current ceramic sheet body is engaged with the groove of an adjacent ceramic sheet body 41; the groove 43 of the current ceramic sheet body is engaged with the protrusion of another adjacent ceramic sheet body 41.

[0041] In actual assembly, the prefabricated supports are first welded to the inner wall of the cylinder one by one through the exposed ends of the anchors. Then, ceramic fiber felt or ceramic fiber blanket is filled between adjacent supports. Next, ceramic pieces are pasted to the inner wall of the support ring one by one, and adjacent ceramic pieces are spliced ​​together only by snap fasteners.

[0042] The two exposed ends of all anchors in the support ring structure serve as welding points to the inner wall of the rotary kiln. The integrated support body, incorporating the heating element and insulation material, is welded to the kiln body, ensuring synchronized rotation between the support body and the kiln body to prevent misalignment during operation. Furthermore, the heating element is positioned closer to the ceramic plates, improving heat transfer efficiency. The modular assembly reduces manufacturing complexity and allows for the fabrication of the required inner diameter dimensions. The axial length of the support ring structure is typically 500-1000mm, a feature not found in existing embedded rotary kilns, thus facilitating the scaling up of rotary kilns. Modular assembly and repair can be performed on a single module, reducing operating costs.

[0043] This invention can be applied to, but is not limited to, positive electrode materials. Lithium-ion battery negative electrode materials and other similar devices are also within the scope of protection of this invention. Example

[0044] A kiln lining structure adapted for an embedded heating rotary kiln is disclosed. The support ring structure consists of several fan-shaped first support bodies joined end-to-end, with a ceramic insulation layer filling the joint surfaces of adjacent first support bodies. Each first support body includes a first high thermal conductivity insulating substrate 11, a first thermal insulation material body 12, a first anchor 13, and a first heating element 14. The first high thermal conductivity insulating substrate 11 is fan-shaped, and the first thermal insulation material body 12, the first anchor 13, and the first heating element 14 are all disposed within the first high thermal conductivity insulating substrate 11. Both ends of the first anchor 13 protrude from the first high thermal conductivity insulating substrate 11. The support structure is formed by joining fan-shaped first support bodies end-to-end. Each first support body integrally molds the first heating element and the first thermal insulation material body within the first high thermal conductivity insulating substrate. Ceramic sheets correspond one-to-one with the first support bodies; the rest is the same as in Embodiment 1.

[0045] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. 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.

[0046] 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 kiln lining structure adapted for an inline heated rotary kiln, characterised in that: The structure includes a support ring structure and a ceramic ring structure, with the ceramic ring structure bonded to the inner ring surface of the support ring structure. The support ring structure includes several annular first supports, each first support being spliced ​​end to end into a ring shape, and the splicing surfaces of adjacent first supports are filled with a ceramic heat insulation layer. The ceramic ring structure includes several annular ceramic sheets (4), each ceramic sheet (4) being spliced ​​end to end into a ring shape, and a lifting structure (5) is provided on the inner arc surface of each ceramic sheet (4). The ceramic sheets (4) are bonded to the first supports one-to-one. The first support body includes a first high thermal conductivity insulating substrate (11), a first thermal insulation material body (12), a first anchor (13), and a first heating element (14); the first high thermal conductivity insulating substrate (11) is fan-shaped, the first thermal insulation material body (12), the first anchor (13) and the first heating element (14) are all disposed inside the first high thermal conductivity insulating substrate (11), and the first heating element (14) is close to the ceramic sheet (4); the two ends of the first anchor (13) are exposed on the outer arc surface of the first high thermal conductivity insulating substrate (11).

2. The kiln lining structure adapted for embedded heating rotary kilns according to claim 1, characterized in that: The first thermal insulation material body (12) and the first heating element (14) are arranged axially within the first high thermal conductivity insulating substrate (11), with the first heating element (14) located near the inner arc surface of the first high thermal conductivity insulating substrate (11) and the first thermal insulation material body (12) located near the outer arc surface of the first high thermal conductivity insulating substrate (11). Several first anchors (13) are arranged at intervals along the axial direction of the first high thermal conductivity insulating substrate (11), with the anchoring body of each first anchor (13) located between the first heating element (14) and the first thermal insulation material body (12), and the two exposed ends of the first anchor (13) are arranged on both sides of the first thermal insulation material body (12).

3. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 2, characterized in that: The outer end face of the first thermal insulation material body (12) and the outer arc surface of the first high thermal conductivity insulating substrate (11) are on the same arc surface.

4. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 1, characterized in that: The support ring structure includes several fan-shaped first support bodies and several fan-shaped second support bodies. The first support bodies and the second support bodies form a splicing unit, and adjacent splicing units are spliced ​​end to end in sequence. A ceramic heat insulation layer is filled between the splicing surfaces of the first support bodies and the second support bodies. Each first support body and each second support body corresponds to a ceramic sheet (4). Each of the first supports includes a first high thermal conductivity insulating substrate (11), a first thermal insulation material body (12), a first anchor (13), and a first heating element (14); the first high thermal conductivity insulating substrate (11) is fan-shaped, and the first thermal insulation material body (12), the first anchor (13), and the first heating element (14) are all disposed inside the first high thermal conductivity insulating substrate (11); and the two ends of the first anchor (13) are exposed on the outer arc surface of the first high thermal conductivity insulating substrate (11); Each of the second supports includes a second high thermal conductivity insulating substrate (21), a second thermal insulation material body (22), and a second anchor (23); the second high thermal conductivity insulating substrate (21) is fan-shaped, and the second thermal insulation material body (22) and the second anchor (23) are both disposed inside the second high thermal conductivity insulating substrate (21); and the two ends of the second anchor (23) are exposed on the outer arc surface of the second high thermal conductivity insulating substrate (21).

5. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 4, characterized in that: The first heating element (14) is located near the inner arc surface of the first high thermal conductivity insulating substrate (11), and the first thermal insulation material body (12) is located near the outer arc surface of the first high thermal conductivity insulating substrate (11); the anchoring body of the first anchor (13) is located between the first heating element (14) and the first thermal insulation material body (12), and the two exposed ends of the first anchor (13) are arranged on both sides of the first thermal insulation material body (12); The second thermal insulation material body (22) is located near the outer arc surface of the second high thermal conductivity insulating substrate (21); the anchoring body of the second anchor (23) wraps around the second thermal insulation material body (22), and the two exposed ends of the second anchor (23) are arranged on both sides of the second thermal insulation material body (22).

6. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 5, characterized in that: The outer end face of the first thermal insulation material body (12) is on the same arc surface as the outer arc surface of the first high thermal conductivity insulating substrate (11); the outer end face of the second thermal insulation material body (22) is on the same arc surface as the outer arc surface of the second high thermal conductivity insulating substrate (21).

7. The kiln lining structure for an adapted embedded heating rotary kiln according to any one of claims 1-6, characterized in that: The first anchor (13) and / or the second anchor (23) include a first exposed end (31), an anchor body (32) and a second exposed end (33), and the first insulation material body (12) or the second insulation material body (21) is located within the area surrounded by the anchor body (32); the anchor body (32) has a first inclined section (321), a straight section (322) and a second inclined section (323); the first inclined section (321) is connected to the first exposed end (31), the straight section (322) is connected to the first inclined section (321) and the second inclined section (323), and the second inclined section (323) is connected to the second exposed end (33).

8. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 7, characterized in that: The center line of the lifting line on each ceramic piece (4) coincides with the center line of the corresponding first or second support.

9. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 8, characterized in that: Each ceramic piece (4) is joined end to end by a snap fastener.

10. The kiln lining structure adapted for an embedded heating rotary kiln according to claim 9, characterized in that: The ceramic sheet (4) includes a ceramic sheet body (41), with a protrusion (42) on one side end and a groove (43) on the other side end; the protrusion (42) is joined with the groove of an adjacent ceramic sheet body (41); the groove (43) is joined with the protrusion of another adjacent ceramic sheet body (41).

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