Masonry structure of hot section cover in chain grate
By using an inner lining structure with a staggered S-shaped joint design in the hot section cover of the chain grate machine, the problems of easy cracking and heat loss in the hot section cover under high temperature environment are solved, and cost-effectiveness and heat insulation performance are improved.
Patent Information
- Application Number
- CN202423096303.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The existing chain grate machine hot section cover has a high construction cost and is prone to cracking in high-temperature environments, resulting in heat loss and reduced insulation performance.
The inner lining is composed of materials such as aluminum silicate fiberboard, insulating bricks, side high alumina mullite cast-in-place slabs, and rock wool boards. Through the staggered S-shaped joint design, combined with anchoring bricks and refractory mortar, the top and side inner linings are formed to release thermal expansion and contraction stress and reduce the risk of cracking.
It reduces production costs and improves insulation through staggered S-shaped seam design, preventing heat loss and maintaining the stability and insulation performance of the lining.
Smart Images
Figure CN223500131U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a chain grate machine, and more particularly to the masonry structure of the hot section cover in the chain grate machine. Background Technology
[0002] A chain grate machine utilizes the waste heat from an annular cooler and the hot airflow from a rotary kiln to dry and preheat green pellets before sending them into the rotary kiln for calcination. A typical chain grate machine processes green pellets through multiple hot sections, each equipped with a heat hood for heating and insulation. Currently, the construction structure of these heat hoods on the market is as follows: Figure 1 As shown, the structure includes a bottom wall, side walls, and a top frame. A side lining is installed on the side walls, abutting against the bottom wall. A top lining is installed on the top frame, abutting against the side linings. Two layers of calcium silicate boards and a layer of high-alumina mullite casting are sequentially installed on the side linings from the outside in. The side linings are supported by anchor bricks. The top lining is assembled from large precast bricks suspended on the top frame. Precast bricks are expensive, increasing production costs. The high-alumina mullite casting layer, which is in direct contact with the high-temperature environment, will generate stress due to thermal expansion and contraction when subjected to temperature changes. If this stress cannot be released, cracks will appear. Once cracks appear, the high-temperature hot air in the heat hood will radiate through the cracks to the calcium silicate boards. Prolonged exposure to the high-temperature hot air radiation can easily cause the calcium silicate boards to pulverize, reducing their thermal insulation performance and resulting in heat loss. Utility Model Content
[0003] The purpose of this invention is to provide a masonry structure for the hot section cover of a chain grate machine that has a low cost but good heat insulation effect.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: the masonry structure of the hot section hood of the chain grate machine includes: a bottom wall, side walls, and a top frame. A side lining is provided on the side walls, abutting against the bottom wall. A top lining is provided on the top frame. The side lining includes: aluminum silicate fiberboard, insulating bricks, and high-alumina mullite cast plates sequentially bonded from the outside to the inside by refractory mortar. Several anchor bricks connected to the side walls are evenly distributed in the side lining. The aluminum silicate fiberboard, insulating bricks, and high-alumina mullite cast plates are all interlocked with the anchor bricks in the side lining. The joints between the aluminum silicate fiberboards are staggered with the joints between the insulating bricks, ensuring... The joints between the thermal bricks are misaligned with the joints between the side high-alumina mullite cast slabs. The top lining includes: lightweight thermal insulation castable, rock wool board and top high-alumina mullite cast slab arranged sequentially from top to bottom. Several anchor bricks connected to the top frame are evenly distributed in the top lining. The top high-alumina mullite cast slab and the rock wool board are both interlocked with the anchor bricks on the top frame and bonded by refractory mortar. The top high-alumina mullite cast slab abuts against the side lining and is connected by refractory mortar. The joints between the top high-alumina mullite cast slabs are misaligned with the joints between the rock wool boards. The lightweight thermal insulation castable is poured and solidified on the rock wool board and the anchor bricks on the top frame.
[0005] Furthermore, in the aforementioned masonry structure of the hot section cover of the chain grate machine, the four rectangular corners of the aluminum silicate fiberboard that do not contact the bottom wall and the top high aluminum mullite cast plate are provided with first slots for engaging with anchor bricks. The two rectangular corners of the upper side wall of the aluminum silicate fiberboard that contact the top high aluminum mullite cast plate do not have first slots, and the two rectangular corners of the lower side wall of the aluminum silicate fiberboard that contact the bottom wall do not have first slots. The left and lower side walls of the aluminum silicate fiberboard are provided with first connecting grooves, and the right and upper side walls of the aluminum silicate fiberboard are provided with first connecting blocks. The lower side wall of the aluminum silicate fiberboard that contacts the bottom wall does not have first connecting grooves, and the upper side wall of the aluminum silicate fiberboard that contacts the top high aluminum mullite cast plate does not have first connecting blocks.
[0006] Furthermore, in the aforementioned masonry structure of the hot section cover of the chain grate machine, a second slot for engaging with the anchoring brick is provided at the center of the upper and lower side walls of the insulating brick that does not contact the bottom wall and the top high-alumina mullite cast plate. There is no second slot on the upper side wall of the insulating brick that contacts the top high-alumina mullite cast plate, and there is no second slot on the lower side wall of the insulating brick that contacts the bottom wall. A second connecting groove is provided on both the left and lower side walls of the insulating brick. A second connecting block extends from both the right and upper side walls of the insulating brick. There is no second connecting groove on the lower side wall of the insulating brick that contacts the bottom wall, and there is no second connecting block on the upper side wall of the insulating brick that contacts the top high-alumina mullite cast plate.
[0007] Furthermore, in the aforementioned masonry structure of the hot section shroud of the chain grate machine, a third groove capable of engaging with the anchor brick is provided at each of the four apex corners of the outer side wall of the high-alumina mullite cast slab that does not contact the bottom wall or the top high-alumina mullite cast slab. There is no third groove on the lower side wall of the high-alumina mullite cast slab that contacts the bottom wall, and no third groove on the upper side wall of the high-alumina mullite cast slab that contacts the top high-alumina mullite cast slab. The left and lower side walls of the aluminum mullite cast plate are provided with third connecting grooves. The right and upper side walls of the side-height aluminum mullite cast plate are provided with third connecting blocks. There are no third connecting grooves on the lower side wall of the side-height aluminum mullite cast plate that contacts the bottom wall. There are no third connecting blocks on the upper side wall of the side-height aluminum mullite cast plate that contacts the top-height aluminum mullite cast plate. The top-height aluminum mullite cast plate has the same structure as the side-height aluminum mullite cast plate.
[0008] Furthermore, in the aforementioned masonry structure of the hot section cover of the chain grate machine, a fourth slot for engaging with the anchor brick is provided at the center of the left and right side walls of the rock wool board that does not contact the left and right side walls. There is no fourth slot on the left side wall of the rock wool board that contacts the left side wall, and there is no fourth slot on the right side wall of the rock wool board that contacts the right side wall. A fourth connecting groove is provided on both the left and front side walls of the rock wool board. A fourth connecting block extends from both the right and rear side walls of the rock wool board. There is no fourth connecting groove on the left side wall of the rock wool board that contacts the left side wall, and there is no fourth connecting block on the right side wall of the rock wool board that contacts the right side wall.
[0009] Furthermore, in the aforementioned chain grate machine's hot section shroud construction structure, a refractory plastic is provided on the bottom wall, and the side lining abuts against the refractory plastic.
[0010] Furthermore, in the aforementioned construction structure of the hot section cover of the chain grate machine, the thickness of the side high-alumina mullite cast plate and the top high-alumina mullite cast plate is 200-210mm, the thickness of the insulation brick is 60-70mm, the thickness of the aluminum silicate fiber board is 100-110mm, the thickness of the rock wool board is 50-60mm, and the thickness of the lightweight insulation castable is 150-160mm.
[0011] The advantages of this invention are as follows: The top lining, composed of a top-heavy alumina mullite cast-in-place slab, rock wool board, lightweight insulating castable, and anchoring bricks, replaces the original large-scale precast brick suspension system. This not only reduces costs but also provides excellent thermal insulation. The parts of the top and side linings that directly contact the high-temperature environment are respectively composed of top-heavy alumina mullite cast-in-place slabs and side-heavy alumina mullite cast-in-place slabs spliced together. During thermal expansion and contraction, the stress caused by structural deformation can be released through the joints, thereby reducing the likelihood of cracks appearing in the side-heavy alumina mullite cast-in-place slabs and top-heavy alumina mullite cast-in-place slabs. This design ensures that the top and side linings maintain good thermal insulation. In the side lining, S-shaped joints are used between the aluminum silicate fiber boards, between the insulating bricks, and between the high-alumina mullite cast boards. In the top lining, S-shaped joints are used between the rock wool boards and between the high-alumina mullite cast boards. Compared with the traditional straight joints, the S-shaped joints enable the side and top linings to provide better thermal insulation. Moreover, the S-shaped joints in each layer of the top and side linings are staggered, which further improves the thermal insulation effect of the top and side linings. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the existing hot section cover's masonry structure.
[0013] Figure 2 This is a schematic diagram of the masonry structure of the hot section cover in the chain grate machine described in this utility model.
[0014] Figure 3 yes Figure 2 A schematic diagram of the structure of aluminosilicate fiberboard.
[0015] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along the AA direction.
[0016] Figure 5 This is a schematic diagram of the connection structure between the aluminum silicate fiberboard and the anchoring brick.
[0017] Figure 6 yes Figure 2 A schematic diagram of the structure of medium-insulation bricks.
[0018] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure in the middle BB direction.
[0019] Figure 8 This is a schematic diagram of the connection structure between the insulation brick and the anchoring brick.
[0020] Figure 9 yes Figure 2 Schematic diagram of the structure of the high-alumina mullite cast slab in the middle.
[0021] Figure 10 yes Figure 9 A schematic diagram of the cross-sectional structure along the CC direction. Detailed Implementation
[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.
[0023] like Figures 2 to 10As shown, the masonry structure of the hot section cover of the chain grate machine of this utility model includes: a bottom wall 1, a side wall 11, and a top frame 12. A side lining 2 is provided on the side wall 11, and a refractory plastic 13 is provided on the bottom wall 1. The side lining 2 abuts against the refractory plastic 13 to improve the sealing performance between the side lining 2 and the bottom wall 1. A top lining 3 is provided on the top frame 12. The side lining 2 includes: an aluminosilicate fiberboard 21, an insulating brick 22, and a high-alumina mullite cast plate 23, which are sequentially bonded from the outside to the inside by refractory mortar. The three layers of heat insulation materials are combined together to effectively insulate heat and prevent heat loss. Several anchoring bricks 4 connected to the side wall 11 are evenly distributed in the side lining 2. The anchoring bricks 4 are existing technology. The aluminosilicate fiberboard 21, the insulating brick 22, and the high-alumina mullite cast plate 23 are all anchored in the side lining 2. The four-phase interlocking of the solid bricks and the joints between the aluminum silicate fiberboard 21 and the joints between the insulating bricks 22 are staggered. The joints between the insulating bricks 22 and the joints between the high-alumina mullite cast slabs 23 are also staggered. Each joint is filled with refractory mortar. When the high-alumina mullite cast slabs 23 undergo thermal expansion and contraction, the stress caused by structural deformation can be released through the joints, thereby reducing the possibility of cracks in the high-alumina mullite cast slabs 23. The complete high-alumina mullite cast slabs 23, together with the insulating bricks 22 and the aluminum silicate fiberboard 21, can play a good role in heat insulation. The joints between the aluminum silicate fiberboard 21, the joints between the insulating bricks 22, and the joints between the high-alumina mullite cast slabs 23 are staggered in sequence, which can prevent high-temperature hot air from directly overflowing from the joints. The top lining 3 includes, from top to bottom, lightweight insulating castable 31, rock wool board 32, and a top high-alumina mullite castable slab 33. Several anchoring bricks 4 connected to the top frame 12 are evenly distributed within the top lining 3. The top high-alumina mullite castable slab 33 and the rock wool board 32 are interlocked with the anchoring bricks 4 on the top frame 12 and bonded together with refractory mortar. The top high-alumina mullite castable slab 33 abuts against the side lining 2 and is connected with refractory mortar. The joints between the top high-alumina mullite castable slabs 33 are staggered with the joints between the rock wool boards 32. Material 31 is poured and solidified on rock wool board 32 and anchor brick 4 connected to top frame 12. The function of top high alumina mullite casting plate 33 is the same as that of side high alumina mullite casting plate 23, which is to prevent cracking. Directly pouring lightweight thermal insulation casting material 31 on rock wool board 32 can improve the stability of top lining. In this embodiment, lightweight thermal insulation casting material 31 can be any one of perlite casting material, alumina hollow sphere casting material or high alumina lightweight casting material. Using the above structure for top lining 3 can reduce production costs while also providing good thermal insulation.
[0024] In this embodiment, the thickness of the side high-alumina mullite casting plate 23 and the top high-alumina mullite casting plate 33 is 200-210mm, the thickness of the thermal insulation brick 22 is 60-70mm, the thickness of the aluminum silicate fiber board 21 is 100-110mm, the thickness of the rock wool board 32 is 50-60mm, and the casting thickness of the lightweight thermal insulation castable 31 is 150-160mm.
[0025] In this embodiment, the four rectangular corners of the aluminosilicate fiberboard 21, which is not in contact with the refractory plastic 13 and the top-height alumina mullite cast plate 33, are each provided with a first slot 211 for engaging with the anchor brick 4. The aluminosilicate fiberboard 21 can be fixed by engaging with the four adjacent anchor bricks 4 through the four first slots 211. The two rectangular corners of the upper sidewall of the aluminosilicate fiberboard 21, which is in contact with the top-height alumina mullite cast plate 33, do not have first slots 211. The two rectangular corners of the lower sidewall of the aluminosilicate fiberboard 21 have first slots 211. After the first slot 211 engages with the two anchor bricks 4, the upper sidewall of the aluminum silicate fiberboard 21 can fit into the top-height aluminum mullite cast plate 33. The two rectangular corners of the lower sidewall of the aluminum silicate fiberboard 21, which contacts the refractory plastic 13, do not have the first slot 211. After the two first slots 211 on the upper sidewall of the aluminum silicate fiberboard 21 engage with the two anchor bricks 4, the lower sidewall of the aluminum silicate fiberboard 21 can fit into the refractory plastic 13. The first slots 211 on the left and lower sidewalls of the aluminum silicate fiberboard 21 are... A first connecting groove 212 is provided. First connecting blocks 213 extend from the right and top side walls of the aluminosilicate fiberboard 21, which does not contact the refractory plastic 13 or the top-height alumina mullite cast plate 33. Two adjacent aluminosilicate fiberboards 21 are connected by the first connecting blocks 213 and the first connecting groove 212. Two adjacent aluminosilicate fiberboards 21 are also connected by the first connecting blocks 213 and the first connecting groove 212. The first connecting groove 212 and the first connecting block 212 are connected by these connecting blocks. Refractory mortar is applied between blocks 213. The joint that appears after insertion is S-shaped, which provides better insulation and stability than the common straight joint. There is no first connecting groove 212 on the lower side wall of the aluminosilicate fiberboard 21 in contact with the refractory plastic 13, and there is no first connecting block 213 on the upper side wall of the aluminosilicate fiberboard 21 in contact with the top high alumina mullite cast plate 33, ensuring the sealing between the aluminosilicate fiberboard 21 and the refractory plastic 13 or the top high alumina mullite cast plate 33.
[0026] Second slots 221 are provided at the center of the upper and lower side walls of the insulating brick 22 that do not contact the refractory plastic 13 and the top high alumina mullite cast plate 33, for engaging with the anchor bricks 4. The insulating brick 22 engages with the two adjacent anchor bricks 4 through the two second slots 221. There are no second slots 221 on the upper side wall of the insulating brick 22 that contacts the top high alumina mullite cast plate 33, thus ensuring that the insulating brick 22 is in close contact with the top high alumina mullite cast plate 33. There are no second slots 221 on the lower side wall of the insulating brick 22 that contacts the refractory plastic 13, thus ensuring that the insulating brick 22 is in close contact with the refractory plastic 13. Second connecting slots 222 are provided on the left and lower side walls of the insulating brick 22 that do not contact the refractory plastic 13 and the top high alumina mullite cast plate 33. A second connecting block 223 is extended on both the right side wall and the upper side wall. When the insulation bricks 22 of this structure are spliced, the two adjacent insulation bricks 22 on the left and right sides are inserted into each other through the second connecting groove 222 and the second connecting block 223. The two adjacent insulation bricks 22 on the top and bottom are also inserted into each other through the second connecting groove 222 and the second connecting block 223. Refractory mortar is applied between the inserted second connecting groove 222 and the second connecting block 223. The S-shaped joint formed by the insertion of the second connecting groove 222 and the second connecting block 223 is misaligned with the S-shaped joint formed by the insertion of the first connecting groove 212 and the first connecting block 213. There is no second connecting groove 222 on the lower side wall of the insulation brick 22 that is in contact with the refractory plastic 13. There is no second connecting block 223 on the upper side wall of the insulation brick 22 that is in contact with the top high aluminum mullite casting plate 33.
[0027] On the four apex corners of the outer wall of the side high-alumina mullite cast plate 23, which does not contact the refractory plastic 13 and the top high-alumina mullite cast plate 33, there are third slots 231 that can be engaged with the anchor bricks 4. The engagement structure between the side high-alumina mullite cast plate 23 and the anchor bricks 4 is similar to the engagement structure between the aluminum silicate fiber board 21 and the anchor bricks 4. The side high-alumina mullite cast plate 23 is connected to the adjacent... The four anchor bricks are interlocked. There is no third slot 231 on the lower side wall of the high-alumina mullite cast plate 23 that contacts the refractory plastic 13, nor on the upper side wall of the high-alumina mullite cast plate 23 that contacts the top high-alumina mullite cast plate 33. Third connecting slots 232 are provided on both the left and lower side walls of the high-alumina mullite cast plate 23. On the right side of the high-alumina mullite cast plate 23… A third connecting block 233 extends from both the side wall and the upper side wall. Two adjacent high-alumina mullite cast plates 23 are connected by a third connecting groove 232 and a third connecting block 233. Two adjacent high-alumina mullite cast plates 23 are also connected by a third connecting groove 232 and a third connecting block 233. Refractory mortar is applied between the interlocking third connecting groove 232 and the third connecting block 233. The S-shaped joint formed by the interlocking third connecting groove 232 and the third connecting block 233 is misaligned with the S-shaped joint formed by the interlocking second connecting groove 222 and the second connecting block 223. There is no third connecting groove 232 on the lower side wall of the high-alumina mullite cast plate 23 that is in contact with the refractory plastic 13. There is no third connecting block 233 on the upper side wall of the high-alumina mullite cast plate 23 that is in contact with the top high-alumina mullite cast plate 33.
[0028] The structure of the top high alumina mullite cast plate 33 is the same as that of the side high alumina mullite cast plate 23, except that the top high alumina mullite cast plate 33 is arranged horizontally and connected to the anchor bricks 4 on the top frame 12. The structure of the top high alumina mullite cast plate 33 that contacts the left and right side walls 11 is the same as that of the side high alumina mullite cast plate 23 that contacts the refractory plastic 13 or the top high alumina mullite cast plate 33 respectively. The side walls of the top high alumina mullite cast plate 33 that do not have the third connecting groove 232 or the third connecting block 233 contact the left and right side walls 11 respectively.
[0029] The structure of the rock wool board 32 is the same as that of the insulation brick 22. A fourth groove for engaging with the anchor brick 4 is provided at the center of the left and right side walls of the rock wool board 32 that do not contact the left and right side walls 11. When the rock wool board 32 is placed horizontally, it engages with two adjacent anchor bricks 4. There is no fourth groove on the left side wall of the rock wool board 32 that contacts the left side wall, and there is no fourth groove on the right side wall of the rock wool board 32 that contacts the right side wall. This ensures that the rock wool boards 32 at both ends can be sealed and fitted tightly with the corresponding side walls 11. On the left and front side walls of the rock wool board 32 that do not contact the left and right side walls 11... Each rock wool board 32 is provided with a fourth connecting groove. A fourth connecting block is provided on the right side wall and the rear side wall of the rock wool board 32 that does not contact the left and right side walls 11. Two adjacent rock wool boards 32 can be inserted through the fourth connecting groove and the fourth connecting block. Two adjacent rock wool boards 32 can also be inserted through the fourth connecting groove and the fourth connecting block. The S-shaped joint between the rock wool boards 32 is misaligned with the S-shaped joint between the top high aluminum mullite cast plate 33. There is no fourth connecting groove on the left side wall of the rock wool board 32 that contacts the left side wall, and there is no fourth connecting block on the right side wall of the rock wool board 32 that contacts the right side wall.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. The masonry structure of the hot section shroud in the chain grate machine, including: The system comprises a bottom wall, side walls, and a top frame. Side linings are provided on the side walls, abutting against the bottom wall. A top lining is provided on the top frame. The side linings are characterized by comprising: aluminosilicate fiberboard, insulating bricks, and high-alumina mullite cast slabs sequentially bonded from the outside to the inside by refractory mortar; a plurality of anchoring bricks connected to the side walls are evenly distributed within the side lining; the aluminosilicate fiberboard, insulating bricks, and high-alumina mullite cast slabs are all interlocked with the anchoring bricks in the side lining; the joints between the aluminosilicate fiberboards are misaligned with the joints between the insulating bricks; and the joints between the insulating bricks are misaligned with the high-alumina mullite cast slabs. The joints between the boards are staggered. The top lining includes: lightweight thermal insulation castable, rock wool board and top high aluminum mullite castable board arranged sequentially from top to bottom. Several anchoring bricks connected to the top frame are evenly distributed in the top lining. The top high aluminum mullite castable board and the rock wool board are both interlocked with the anchoring bricks on the top frame and bonded by refractory mortar. The top high aluminum mullite castable board abuts against the side lining and is connected by refractory mortar. The joints between the top high aluminum mullite castable boards and the joints between the rock wool boards are staggered. The lightweight thermal insulation castable is poured and solidified on the rock wool board and the anchoring bricks on the top frame.
2. The masonry structure of the hot section cover in the chain grate machine according to claim 1, characterized in that: On the four rectangular corners of the aluminum silicate fiberboard that does not contact the bottom wall and the top high aluminum mullite cast plate, there are first slots for engaging with anchor bricks. On the two rectangular corners of the upper side wall of the aluminum silicate fiberboard that contacts the top high aluminum mullite cast plate, there are no first slots. On the two rectangular corners of the lower side wall of the aluminum silicate fiberboard that contacts the bottom wall, there are no first slots. On the left side wall and the lower side wall of the aluminum silicate fiberboard, there are first connecting grooves. On the right side wall and the upper side wall of the aluminum silicate fiberboard, there are first connecting blocks extending. On the lower side wall of the aluminum silicate fiberboard that contacts the bottom wall, there are no first connecting grooves. On the upper side wall of the aluminum silicate fiberboard that contacts the top high aluminum mullite cast plate, there are no first connecting blocks.
3. The masonry structure of the hot section cover in the chain grate machine according to claim 2, characterized in that: A second slot is provided at the center of the upper and lower side walls of the insulation brick that does not contact the bottom wall or the top high aluminum mullite cast plate, and it engages with the anchor brick. There is no second slot on the upper side wall of the insulation brick that contacts the top high aluminum mullite cast plate, and there is no second slot on the lower side wall of the insulation brick that contacts the bottom wall. A second connecting groove is provided on both the left and lower side walls of the insulation brick. A second connecting block extends from both the right and upper side walls of the insulation brick. There is no second connecting groove on the lower side wall of the insulation brick that contacts the bottom wall, and there is no second connecting block on the upper side wall of the insulation brick that contacts the top high aluminum mullite cast plate.
4. The masonry structure of the hot section cover in the chain grate machine according to claim 3, characterized in that: A third slot is provided at each of the four top corners of the outer side wall of the high-alumina mullite cast slab that does not contact the bottom wall or the high-alumina mullite cast slab, allowing it to engage with the anchor brick. There is no third slot on the lower side wall of the high-alumina mullite cast slab that contacts the bottom wall. There is no third slot on the upper side wall of the high-alumina mullite cast slab that contacts the top high-alumina mullite cast slab. A third connecting groove is provided on the left and lower side walls of the high-alumina mullite cast slab. A third connecting block extends from the right and upper side walls of the high-alumina mullite cast slab. There is no third connecting groove on the lower side wall of the high-alumina mullite cast slab that contacts the bottom wall. There is no third connecting block on the upper side wall of the high-alumina mullite cast slab that contacts the top high-alumina mullite cast slab. The top high-alumina mullite cast slab has the same structure as the side high-alumina mullite cast slab.
5. The masonry structure of the hot section cover in the chain grate machine according to claim 4, characterized in that: A fourth slot for engaging with anchor bricks is provided at the center of the left and right side walls of the rock wool board that does not contact the left and right side walls. There is no fourth slot on the left side wall of the rock wool board that contacts the left side wall, and there is no fourth slot on the right side wall of the rock wool board that contacts the right side wall. A fourth connecting slot is provided on the left side wall and the front side wall of the rock wool board. A fourth connecting block is provided on the right side wall and the rear side wall of the rock wool board. There is no fourth connecting slot on the left side wall of the rock wool board that contacts the left side wall, and there is no fourth connecting block on the right side wall of the rock wool board that contacts the right side wall.
6. The masonry structure of the hot section cover in the chain grate machine according to claim 5, characterized in that: A fire-resistant plastic is installed on the bottom wall, and the side lining abuts against the fire-resistant plastic.
7. The masonry structure of the hot section cover in the chain grate machine according to claim 6, characterized in that: The thickness of the side high-alumina mullite cast-in-place slab and the top high-alumina mullite cast-in-place slab is 200-210mm, the thickness of the thermal insulation brick is 60-70mm, the thickness of the aluminum silicate fiber board is 100-110mm, the thickness of the rock wool board is 50-60mm, and the thickness of the lightweight thermal insulation castable is 150-160mm.