Refractory brick and rotary kiln

Abstract

The utility model discloses a kind of firebrick and rotary kiln, firebrick includes: brick body, the brick body is ring segment, the brick body has first bottom surface and second bottom surface being oppositely arranged along axial direction, ring inner side and ring outer side being oppositely arranged along radial direction, and first end surface and second end surface being oppositely arranged along circumferential direction;First limiting part is formed on the brick body, the first limiting part is raised from the first bottom surface to the direction away from the second bottom surface and extends to the first end surface outside along the circumferential direction;First recess is formed on one side of the first limiting part located at the second bottom surface side, second recess is formed on one side of the first limiting part located at the second end surface side.The firebrick and rotary kiln provided in the utility model embodiment can improve the problem of existing rotary kiln brick drop.

Description

Technical Field

[0001] This utility model relates to the field of refractory bricks, and more particularly to a refractory brick and a rotary kiln. Background Technology

[0002] In rotary kilns, refractory bricks play a crucial role, insulating the kiln interior from the high temperatures of the materials inside, preventing oxidation and corrosion, and reducing heat loss. In a rotary kiln, multiple refractory bricks are arranged in a ring around the kiln body, and these rings are then stacked along the length of the kiln. In existing technologies, the refractory bricks or castable linings used in the production of activated carbon and carbonized materials have historically suffered from brick shedding and refractory scattering, causing inconvenience to production. Utility Model Content

[0003] Therefore, in order to overcome at least some of the defects and deficiencies in the prior art, this utility model provides a refractory brick and a rotary kiln, which can improve the problem of brick falling off easily in existing rotary kilns.

[0004] This utility model provides a refractory brick, comprising: a brick body, the brick body being annular in shape, the brick body having a first bottom surface and a second bottom surface arranged opposite each other along the axial direction, an inner side surface and an outer side surface arranged opposite each other along the radial direction, and a first end surface and a second end surface arranged opposite each other along the circumferential direction; a first limiting portion is formed on the brick body, the first limiting portion protruding from the first bottom surface in a direction away from the second bottom surface and extending circumferentially to protrude beyond the first end surface; a first recess is formed on the side of the first limiting portion located on the second bottom surface, and a second recess is formed on the side of the first limiting portion located on the second end surface.

[0005] In some embodiments, the surface of the first limiting portion facing away from the first bottom surface is an arc-shaped convex surface, and the first recess has a first arc-shaped concave surface; and / or, the surface of the first limiting portion protruding outside the first end face is an arc-shaped convex surface, and the second recess has a second arc-shaped concave surface.

[0006] In some embodiments, the height of the first limiting portion protruding from the first bottom surface is less than the depth of the first recess relative to the second bottom surface; and / or, the length of the first limiting portion protruding from the first end face is less than the depth of the second recess relative to the second end face.

[0007] In some embodiments, a first recessed structure is formed on the outer surface of the ring.

[0008] In some embodiments, the number of the first recessed structures is multiple.

[0009] In some embodiments, a first protrusion structure is formed on the outer surface of the ring.

[0010] In some embodiments, the first protrusion structure is provided with a first through hole extending along the axial direction, and the brick body is formed with a second through hole communicating with the first through hole, the second through hole extending radially from the inner side of the ring.

[0011] In some embodiments, a lifting plate portion is further formed on the brick body, the lifting plate portion protruding from the inner side of the ring toward the side away from the outer side of the ring.

[0012] This utility model embodiment also provides a rotary kiln, including a cylinder and a plurality of refractory brick groups stacked sequentially along the axial direction of the cylinder. Each refractory brick group includes a plurality of refractory bricks arranged in a ring around the circumference of the cylinder. Each refractory brick includes a brick body, which is ring-shaped. The brick body has a first bottom surface and a second bottom surface arranged opposite each other along the axial direction, an inner side surface and an outer side surface arranged opposite each other along the radial direction, and a first end surface and a second end surface arranged opposite each other along the circumference. A first limiting portion is formed on the brick body, which extends from the first bottom surface toward a direction away from the second bottom surface. The protrusion extends circumferentially beyond the first end face; a first recess is formed on one side of the first limiting portion located on the second bottom surface, and a second recess is formed on one side of the first limiting portion located on the second end face; in each of the refractory brick groups, the portion of the first limiting portion of one of two adjacent refractory bricks extending beyond the first end face engages with the first recess of the other of the two adjacent refractory brick groups; in multiple refractory brick groups, the portion of the first limiting portion of one of two adjacent refractory brick groups extending beyond the first bottom surface engages with the second recess of the other of the two adjacent refractory brick groups.

[0013] In some embodiments, a second limiting portion is formed on the outer side of the refractory brick ring; the rotary kiln further includes an insulating brick layer located between the refractory brick assembly and the cylinder, the insulating brick layer comprising a plurality of insulating bricks, a third limiting portion being formed on the side of the insulating brick facing the refractory brick assembly, the refractory brick assembly and the insulating brick layer being connected and limited by the second limiting portion and the third limiting portion; or, a fourth limiting portion is provided on the cylinder, the refractory brick assembly being connected and limited by the fourth limiting portion and the second limiting portion.

[0014] As can be seen from the above, the above embodiments of this utility model can achieve one or more of the following beneficial effects: by setting a first limiting part in the refractory brick that protrudes in a direction away from the first bottom surface 111 and also protrudes from the first end face, the refractory brick is fixed in two directions by the integral structure of the first limiting part, so that the refractory brick can be stably limited in both the circumferential and axial directions of the cylinder in the rotary kiln, and the problem of brick falling off is not easy, and the strength is better. Attached Figure Description

[0015] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of a refractory brick provided for an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the refractory brick from another perspective.

[0018] Figure 3 for Figure 2 Top view.

[0019] Figure 4 This is a three-dimensional structural diagram of another refractory brick provided in an embodiment of the present utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of another type of refractory brick provided in an embodiment of the present utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of another type of refractory brick provided in an embodiment of the present utility model.

[0022] Figure 7 This is a schematic diagram of the structure of a rotary kiln provided for an embodiment of the present utility model.

[0023] Figure 8 This is a schematic diagram of another rotary kiln provided in an embodiment of the present utility model.

[0024] Figure 9 This is a schematic diagram of a refractory brick assembly in a rotary kiln, provided as an embodiment of the present invention.

[0025] [Explanation of Labels in the Attached Image] 1000 Rotary kiln; 10 Refractory brick; 11 Brick body; 111 First bottom surface; 112 Second bottom surface; 113 First end face; 114 Second end face; 115 Inner side of ring; 116 Outer side of ring; 117 First recessed structure; 118 First protruding structure; 119 First through hole; 1110 Second through hole; 1111 Lifting plate part; 12 First limiting part; 121 First recess; 122 Second recess; 20 Cylinder; 30 Insulating brick layer; 31 Insulating brick; 311 Second protruding structure; 312 Second recessed structure. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] It should also be noted that the division of multiple embodiments in this utility model is only for the convenience of description and should not constitute a special limitation. Features in various embodiments can be combined and referenced in each other without contradiction.

[0030] This utility model embodiment provides a rotary kiln 1000, referencing... Figure 7 The rotary kiln 1000 includes a cylinder 20 and multiple refractory brick groups stacked sequentially along the axial direction of the cylinder 20. Each refractory brick group includes multiple refractory bricks 10 arranged in a ring around the circumference of the cylinder 20. (Refer to...) Figures 1 to 3 The refractory brick 10 includes a brick body 11, which is annular in shape. The brick body 11 has a first bottom surface 111 and a second bottom surface 112 arranged axially opposite each other, an inner annular surface 115 and an outer annular surface 116 arranged radially opposite each other, and a first end surface 113 and a second end surface 114 arranged circumferentially opposite each other. A first limiting portion 12 is formed on the brick body 11. The first limiting portion 12 protrudes from the first bottom surface 111 in a direction away from the second bottom surface 112 and extends circumferentially beyond the first end surface 113. A first recess 121 is formed on the side of the first limiting portion 12 located on the second bottom surface 112, and a second recess 122 is formed on the side of the first limiting portion 12 located on the second end surface 114.

[0031] In each refractory brick assembly, the portion of the first limiting part 12 of one of two adjacent refractory bricks 10 protruding beyond the first end face 113 engages with the first recess 121 of the other adjacent refractory brick assembly. This ensures a tight connection between the refractory bricks 10 in the same ring, preventing them from falling off. In multiple refractory brick assemblies, the portion of the first limiting part 12 of one of two adjacent refractory brick assemblies protruding beyond the first bottom face 111 engages with the second recess 122 of the other adjacent refractory brick assembly. This ensures a tight connection of multiple refractory brick assemblies along the length of the cylinder 20, preventing them from falling off.

[0032] Specifically, the diameter of the cylinder 20 of the rotary kiln 1000 can be 1.2m to 2.5m. The dimensions of the refractory bricks 10 can be specifically designed according to different diameter cylinders 20 and different numbers of bricks. The brick body 11 is annular, allowing multiple refractory bricks 10 to be arranged in a ring to form a ring-shaped refractory brick group. The axial, circumferential, and radial directions of the brick body 11 are the axial, circumferential, and radial directions of the ring segment. Inside the rotary kiln 1000, the axial direction of the cylinder 20 is the axial direction of the refractory bricks 10; the radial direction of the cylinder 20 is the radial direction of the refractory bricks 10; and the circumferential direction of the cylinder 20 is the circumferential direction of the refractory bricks 10. In the rotary kiln 1000, refractory mortar is provided between adjacent refractory bricks 10 and between adjacent refractory brick groups, and the brick joints between adjacent refractory brick groups are staggered, for example.

[0033] The first limiting part 12 is, for example, centrally located relative to the inner side 115 and outer side 116 of the brick body 11. The difference in radius between the outer side 116 and the inner side 115 is defined as the width of the brick body 11, and the width of the first limiting part 12 can be one-third of the width of the brick body 11. For example, the width of the brick body 11 can be 150 mm, the width of the first limiting part 12 can be 50 mm, the width between the first limiting part 12 and the outer side 116 is 50 mm, and the width between the first limiting part 12 and the inner side 115 is 50 mm. In this embodiment, the first limiting part 12 protrudes in a direction away from the first bottom surface 111 and also protrudes from the first end face 113. The integral structure of the first limiting part 12 achieves the locking and fixing of the refractory brick 10 in two directions, ensuring stable positioning of the refractory brick 10 in both the circumferential and axial directions of the cylinder 20 within the rotary kiln 1000, reducing the likelihood of brick falling off, and improving strength.

[0034] In some embodiments, the surface of the first limiting part 12 facing away from the first bottom surface 111 is an arc-shaped convex surface, and the first recess 121 has a first arc-shaped concave surface. In some embodiments, the surface of the first limiting part 12 protruding beyond the first end surface 113 is an arc-shaped convex surface, and the second recess 122 has a second arc-shaped concave surface. The design of the arc surface matching the arc surface makes the first limiting part 12 stronger and less prone to damage due to transportation bumps, ensuring that the refractory bricks 10 can be more perfectly fitted together

[11] .

[0035] In some embodiments, the height of the first limiting portion 12 protruding from the first bottom surface 111 is less than the depth of the first recess 121 relative to the second bottom surface 112. For example, the height of the first limiting portion 12 protruding from the first bottom surface 111 is 50 mm, and the depth of the first recess 121 relative to the second bottom surface 112 is 54 mm. In some embodiments, the length of the first limiting portion 12 protruding from the first end face 113 is less than the depth of the second recess 122 relative to the second end face 114. For example, the length of the first limiting portion 12 protruding from the first end face 113 is 50 mm, and the depth of the second recess 122 relative to the second end face 114 is 54 mm. This configuration allows for the provision of filling space for the refractory mortar and provides redundant width for alignment between the first limiting portion 12 and the first recess 121 or the second recess 122, facilitating alignment.

[0036] In some embodiments, the rotary kiln 1000 further includes an insulating brick layer 30, which is located between the refractory brick group 10 and the cylinder 20, and includes a plurality of insulating bricks 31. The insulating brick layer 30 can provide better thermal insulation.

[0037] In some embodiments, a second limiting portion is formed on the outer circumferential surface 116 of the refractory brick 10, and a third limiting portion is formed on the side of the insulating brick 31 facing the refractory brick 10 assembly. The refractory brick 10 assembly and the insulating brick layer 30 are connected and limited by the second limiting portion and the third limiting portion. Specifically, the second limiting portion can be a recessed structure or a protruding structure, and the third limiting portion can be a protruding structure or a recessed structure.

[0038] For example, in some embodiments, a first recessed structure 117 is formed on the outer surface 116 of the ring. The first recessed structure 117 can serve as a second limiting portion. In some embodiments, a second protruding structure 311 is formed on the insulating brick 31, and the second protruding structure 311 can serve as a third limiting portion. Figure 7 The refractory brick 10 and the insulating brick 31 shown are connected and limited by interlocking with each other through the first recessed structure 117 and the second protruding structure 311.

[0039] In some embodiments, refer to Figure 4A first protrusion structure 118 is formed on the outer side 116 of the ring. The first protrusion structure 118 can serve as a second limiting part. Correspondingly, refer to... Figure 8 A second recessed structure 312 is formed on the insulating brick 31, and the second recessed structure 312 can serve as a third limiting part. For example... Figure 8 As shown, the refractory brick 10 and the insulating brick 31 are connected and limited by the first protruding structure 118 and the second recessed structure 312.

[0040] In some embodiments, refer to Figure 5 The first protruding structure 118 has a first through hole 119 extending axially, and the brick body 11 has a second through hole 1110 communicating with the first through hole 119. The second through hole 1110 extends radially from the inner side surface 115 of the ring. The first through hole 119 can be used to pass through a steam pipe, which has a steam hole communicating with the second through hole 1110, so that steam in the steam pipe can enter the cylinder 20 through the second through hole 1110. The first through hole 119 can not only allow the steam pipe to pass through, but also limit the refractory brick assembly through the steam pipe. In some embodiments, the diameter of the first through hole 119 gradually decreases in the direction close to the first through hole 119 to avoid clogging the steam pipe.

[0041] In some embodiments, continue to refer to Figure 5 The brick body 11 also has a lifting plate 1111, which protrudes from the inner side 115 of the ring toward the side away from the outer side 116 of the ring. The lifting plate 1111 can be used to achieve sufficient mixing of the material inside the cylinder 20. The length of the lifting plate 1111 protruding from the inner side 115 of the ring is, for example, 50 mm, and it can have suitable strength.

[0042] It should be noted that the rotary kiln 1000 can use only one type of refractory brick 10, or it can be a combination of multiple types of refractory bricks 10, for example... Figure 8 As shown, some refractory bricks 10 have a first through hole 119 and a lifting plate portion 1111, while other refractory bricks 10 do not have a first through hole 119 and a lifting plate portion 1111.

[0043] In some embodiments, a fourth limiting part is provided on the cylinder 20, and the refractory brick group 10 is limited and connected to the second limiting part through the fourth limiting part. The second limiting part may be, for example, a first recessed structure 117, and the fourth limiting part may be, for example, a steel pipe fixed to the cylinder 20. In some embodiments, refer to... Figure 6 The first recessed structure 117 is multiple, and multiple refractory bricks 10 can be arranged to form such a shape. Figure 9The refractory brick assembly shown. The fourth limiting part can be limited and connected to a first recessed structure 117 of a portion of the multiple refractory bricks 10. For example, the brick joints of two adjacent refractory brick assemblies are staggered along the axial direction of the cylinder 20. The two adjacent refractory brick assemblies are respectively referred to as the first refractory brick assembly and the second refractory brick assembly, and the two first recessed structures 117 of each refractory brick 10 in the first refractory brick assembly are respectively aligned with a first recessed structure 117 of two adjacent refractory bricks 10 in the second refractory brick assembly. In this way, multiple refractory brick assemblies can be limited by a steel pipe.

[0044] The refractory brick 10 and the rotary kiln 1000 including the refractory brick 10 provided in the above embodiments of this utility model, through the specific setting of the first limiting part 12 on the refractory brick 10, the refractory bricks 10 in the same ring of the rotary kiln 1000 can be mutually limited and connected, and the refractory bricks 10 in two adjacent rings can also be mutually limited and connected, so as to achieve the effect of stability and not easy to fall off the bricks.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A refractory brick, characterized in that, include: The brick body (11) is annular in shape. The brick body (11) has a first bottom surface (111) and a second bottom surface (112) arranged opposite each other along the axial direction, an inner side surface (115) and an outer side surface (116) arranged opposite each other along the radial direction, and a first end surface (113) and a second end surface (114) arranged opposite each other along the circumferential direction. A first limiting part (12) is formed on the brick body (11). The first limiting part (12) protrudes from the first bottom surface (111) in a direction away from the second bottom surface (112) and extends along the circumferential direction to protrude out of the first end surface (113). A first recess (121) is formed on the side of the first limiting part (12) located on the second bottom surface (112), and a second recess (122) is formed on the side of the first limiting part (12) located on the second end surface (114).

2. The refractory brick as described in claim 1, characterized in that, The surface of the first limiting part (12) facing away from the first bottom surface (111) is an arc-shaped convex surface, and the first recess (121) has a first arc-shaped concave surface; and / or, the surface of the first limiting part (12) protruding out of the first end surface (113) is an arc-shaped convex surface, and the second recess (122) has a second arc-shaped concave surface.

3. The refractory brick as described in claim 1, characterized in that, The height of the first limiting part (12) protruding from the first bottom surface (111) is less than the depth of the first recess (121) recessed relative to the second bottom surface (112); and / or, the length of the first limiting part (12) protruding from the first end surface (113) is less than the depth of the second recess (122) recessed relative to the second end surface (114).

4. The refractory brick as described in claim 1, characterized in that, The outer side surface (116) of the ring has a first recessed structure (117).

5. The refractory brick as described in claim 4, characterized in that, The number of the first recessed structures (117) is multiple.

6. The refractory brick as described in claim 1, characterized in that, The outer side (116) of the ring has a first protrusion structure (118).

7. The refractory brick as described in claim 6, characterized in that, The first protruding structure (118) is provided with a first through hole (119) that extends along the axial direction, and the brick body (11) is provided with a second through hole (1110) that communicates with the first through hole (119). The second through hole (1110) extends radially from the inner side surface (115) of the ring.

8. The refractory brick as described in claim 1, characterized in that, The brick body (11) also has a lifting plate (1111) formed on it, the lifting plate (1111) protruding from the inner side (115) of the ring toward the side away from the outer side (116) of the ring.

9. A rotary kiln, characterized in that, It includes a cylinder (20) and a plurality of refractory brick groups stacked sequentially along the axial direction of the cylinder (20), each refractory brick group including a plurality of refractory bricks (10) arranged in a ring around the circumference of the cylinder (20). The refractory brick (10) includes a brick body (11), which is annular in shape. The brick body (11) has a first bottom surface (111) and a second bottom surface (112) arranged opposite each other along the axial direction, an inner side surface (115) and an outer side surface (116) arranged opposite each other along the radial direction, and a first end surface (113) and a second end surface (114) arranged opposite each other along the circumferential direction. A first limiting part (12) is formed on the brick body (11). The first limiting part (12) protrudes from the first bottom surface (111) in a direction away from the second bottom surface (112) and extends along the circumferential direction to protrude outside the first end surface (113). A first recess (121) is formed on the side of the first limiting part (12) located on the second bottom surface (112), and a second recess (122) is formed on the side of the first limiting part (12) located on the second end surface (114). In each of the refractory brick groups, the first limiting portion (12) of one of the two adjacent refractory bricks (10) extends out of the first end face (113) and engages with the first recess (121) of the other of the two adjacent refractory brick groups. In the plurality of refractory brick groups, the portion of the first limiting part (12) of one of the two adjacent refractory brick groups protruding from the first bottom surface (111) is engaged with the second recess (122) of the other of the two adjacent refractory brick groups.

10. The rotary kiln as described in claim 9, characterized in that, The outer side (116) of the refractory brick (10) has a second limiting portion formed thereon; The rotary kiln (1000) further includes an insulating brick layer (30), which is located between the refractory brick (10) assembly and the cylinder (20). The insulating brick layer (30) includes a plurality of insulating bricks (31), and a third limiting part is formed on the side of the insulating brick (31) facing the refractory brick (10) assembly. The refractory brick (10) assembly and the insulating brick layer (30) are connected and limited by the second limiting part and the third limiting part; or, The cylinder (20) is provided with a fourth limiting part, and the refractory brick (10) group is limited and connected to the second limiting part through the fourth limiting part.

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