Refractory brick for furnaces and method for producing the same

Abstract

The application relates to the technical field of furnace refractory bricks, and discloses a furnace refractory brick and a production method thereof, which comprises a first brick body, further comprises a second brick body, a steel structure is arranged in the first brick body and the second brick body, limit grooves are arranged at the upper and lower ends of the connecting groove, a screw rod is threadedly connected in the connecting block, a fixing block is threadedly connected on the screw rod, limit blocks matched with the limit grooves are rotationally connected at the upper and lower ends of the fixing block, clamping grooves are arranged at the upper and lower ends of the connecting block, a fixing plate is fixedly connected in the moving groove, a gear is rotationally connected on the fixing plate, a plurality of first gear teeth and a plurality of second gear teeth are meshingly connected with the gear, a first connecting plate is fixedly connected with the plurality of first gear teeth, a moving plate is fixedly connected on the first connecting plate, two slide columns are fixedly connected at the bottom end of the moving plate, the two slide columns are slidably connected with the second brick body, rollers are rotationally connected at the bottom ends of the two slide columns, and a second connecting plate is fixedly connected with the plurality of second gear teeth.

Description

Technical Field

[0001] This invention relates to the field of furnace refractory brick technology, specifically to a furnace refractory brick and its production method. Background Technology

[0002] As is well known, refractory bricks used in RH furnaces, namely directly bonded magnesia-chrome bricks, molten particle rebonded magnesia-chrome bricks, and magnesia-chrome bricks with finer pores, are usually made of chromite and brick-making magnesia. During the refining process in RH furnaces, the lower part, bottom, and throat of the RH vacuum chamber need to be subjected to high-speed circulating molten steel scouring, superheating, and penetration. Therefore, RH furnace bricks are required for lining during the construction process.

[0003] A search revealed a patent published on July 8, 2022, in China, patent publication number CN114719285A, for a refractory brick used in boiler construction. The general description includes a brick body, a locking block located at the center of the upper surface of the brick body, a locking groove located at the center of the lower surface of the brick body, and a rotating mechanism located on the upper surface of the brick body corresponding to the locking block. The rotating mechanism includes a placement groove on the upper surface of the brick body corresponding to the locking block, two fixing rings symmetrically fixedly connected to the sidewall of the placement groove at the position corresponding to the locking block, and a rotating shaft positioned between the two fixing rings. A sleeve is fitted onto the outer circumference of the rotating shaft located between the two fixing rings; a connecting block is fixedly connected to the upper end of the outer circumference of the sleeve.

[0004] Although the above-mentioned existing technical solutions can reduce the impact of the collision between bricks caused by the bumps of the transport vehicle on the jammed block, reduce the occurrence of cracks or breaks at the connection between the jammed block and the brick body, and reduce the impact on subsequent refractory brick laying, the refractory bricks are not easy to replace when damaged in the later stage, and the refractory brick laying is relatively low. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a furnace refractory brick and its production method, which solves the problem mentioned in the background art. This invention allows for the replacement of all refractory bricks at a single location during the construction process, eliminating the tedious operation of applying refractory mortar, shortening the time required for RH furnace refractory wall construction, improving the efficiency of RH furnace refractory wall construction, reducing the occurrence of large differences in joints on the constructed refractory wall, improving reliability, and enhancing convenience.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a furnace refractory brick, comprising a first brick body, a second brick body, and a connecting assembly. Steel structures are installed within both the first and second brick bodies. The first and second brick bodies are slidably connected. Moving grooves and connecting grooves are provided on both the first and second brick bodies. The connecting assembly includes a connecting block, which is detachably connected to the connecting groove. Limit grooves are provided at both the upper and lower ends of the connecting groove. A screw is threadedly connected to the connecting block, and a fixing block is threadedly connected to the screw. Both the upper and lower ends of the fixing block are rotatably connected to... A limiting block that matches the limiting groove is provided. Both the upper and lower ends of the connecting block are provided with slots. A fixed plate is fixedly connected in the moving groove. A gear is rotatably connected to the fixed plate. The gear meshes with multiple first gear teeth and multiple second gear teeth. A first connecting plate is fixedly connected to the multiple first gear teeth. A moving plate is fixedly connected to the first connecting plate. Two sliding columns are fixedly connected to the bottom end of the moving plate. Both sliding columns are slidably connected to the second brick. Rollers are rotatably connected to the bottom ends of the two sliding columns. A second connecting plate is fixedly connected to the multiple second gear teeth. A limiting plate is installed in the moving groove.

[0009] Preferably, the steel structure includes a plurality of first reinforcing bars, which are installed in the first brick body and the second brick body. The bottom ends of the plurality of first reinforcing bars are fixedly connected by a plurality of second reinforcing bars. The bottom ends of the plurality of second reinforcing bars are fixedly connected to a connecting frame. The bottom end of the connecting frame is fixedly connected to a third reinforcing bar. The bottom end of the third reinforcing bar is fixedly connected to a fourth reinforcing bar.

[0010] Furthermore, both the first and second bricks are curved bricks.

[0011] Furthermore, multiple first bricks and multiple second bricks form a column, with the first layer composed of first bricks and the rest composed of second bricks.

[0012] Based on the aforementioned scheme, rollers are rotatably connected to the two sliding columns.

[0013] Preferably, based on the aforementioned scheme, a handle is fixedly connected to the second connecting plate.

[0014] Furthermore, based on the aforementioned scheme, the refractory material is magnesia, comprising 85-95% MgO, 2.8-4.5% SiO2, and 0.8-1.4% CaO.

[0015] A furnace refractory brick includes the following steps:

[0016] S1. When using the refractory bricks for the furnace, firstly, multiple first bricks are connected to form a base, and then the second bricks are placed and connected in sequence. Each layer is connected by a roller. The second connecting plate is slid by a handle. The first connecting plate is moved up and down by a gear for disassembly. Multiple first bricks are connected by a connecting component, and multiple second bricks are connected by a connecting component.

[0017] S2. When refractory bricks need to be produced, the components of the aggregate are put into a mixer according to the above weight parts and mixed evenly to obtain an aggregate mixture. The components of the powder are put into a mixer according to the above weight parts and mixed evenly to obtain a powder mixture. The components of the binder are put into a mixer according to the above weight parts and mixed evenly to obtain a binder mixture. Water is added to the binder to prepare a mixed slurry. The amount of water added is 8-12% of the weight of the aggregate. The aggregate mixture and the mixed slurry are then introduced into a mixer and stirred. Finally, the aggregate is obtained and then placed into a mold to obtain refractory bricks.

[0018] S3. The raw materials for the refractory bricks used in this furnace are formulated according to the following proportions: 70-100 parts by weight of aggregate, 25-34 parts by weight of powder, and 8-14 parts by weight of binder. The aggregate is composed of 16-20 parts by weight of light-burned dolomite, 20-28 parts by weight of magnesite ore, 21-25 parts by weight of chromite ore, and 13-22 parts by weight of clay clinker. The powder is composed of 6-9 parts by weight of beryllium oxide, 15-19 parts by weight of sillimanite powder, and 1-3 parts by weight of aluminum titanate. The binder is composed of 1-3 parts by weight of light-burned high-alumina bauxite powder, 5-7 parts by weight of clay, and 2-4 parts by weight of magnesium phosphate cementing material.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a furnace refractory brick and its production method, which has the following beneficial effects:

[0021] 1. The present invention, through the setting of the connecting components, facilitates the more convenient interconnection of multiple first bricks or multiple second bricks, thereby improving convenience.

[0022] 2. This invention, through the cooperation of the first gear, the second gear, and the gear, facilitates the replacement of refractory bricks more conveniently in the later stages, improves practicality, and enables the replacement of all refractory bricks in one location, eliminating the tedious operation required to apply refractory mortar, shortening the time required for RH furnace refractory wall construction, improving the work efficiency of RH furnace refractory wall construction, and reducing the occurrence of large differences in the transition joints on the constructed refractory wall.

[0023] 3. The present invention, through the setting of steel structure, can make refractory bricks more stable and improve reliability. In addition, it is lightweight, has high reliability in operation, and has good vibration (earthquake) resistance and impact resistance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 This is a partially enlarged structural diagram of the first and second bricks of the present invention;

[0026] Figure 3 This is an enlarged structural diagram of the connection component of the present invention;

[0027] Figure 4 This is an enlarged schematic diagram of the steel structure of the present invention;

[0028] Figure 5 This is an enlarged structural diagram of the components of the present invention, including the first gear tooth, the second gear tooth, and the gear.

[0029] In the diagram: 1. First brick; 2. Second brick; 3. Connecting block; 4. Screw; 5. Fixing block; 6. Limiting block; 7. Fixing plate; 8. Gear; 9. First gear tooth; 10. Second gear tooth; 11. First connecting plate; 12. Moving plate; 13. Sliding column; 14. Second connecting plate; 15. Limiting plate; 16. First reinforcing bar; 17. Second reinforcing bar; 18. Connecting frame; 19. Third reinforcing bar; 20. Fourth reinforcing bar; 21. Roller; 22. Handle. Detailed Implementation

[0030] 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.

[0031] Example

[0032] Please see Figure 1-5A furnace refractory brick includes a first brick body 1, a second brick body 2, and a connecting assembly. Steel structures are installed within both the first brick body 1 and the second brick body 2 to enhance their stability. The first brick body 1 and the second brick body 2 are slidably connected, facilitating future replacement of refractory bricks in different positions. Both the first brick body 1 and the second brick body 2 have moving grooves and connecting grooves. The connecting assembly includes a connecting block 3, which is detachably connected to the connecting groove. Multiple first brick bodies 1 or second brick bodies 2 can be connected through the cooperation of the connecting block 3 and the connecting groove. Limiting grooves are provided at both the upper and lower ends of the connecting groove. A screw rod 4 is threadedly connected to the connecting block 3, and a fixing block 5 is threadedly connected to the screw rod 4, allowing the fixing block 5 to move. Limiting blocks 6, matching the limiting grooves, are rotatably connected to both the upper and lower ends of the fixing block 5. Slots are provided at both the upper and lower ends of the connecting block 3 to facilitate better connection of multiple first brick bodies 1 or second brick bodies 2. The second bricks 2 are more easily connected to each other, improving convenience, eliminating the tedious operation of applying refractory mortar, shortening the time required for RH furnace refractory wall construction, improving the work efficiency of RH furnace refractory wall construction, and reducing the occurrence of large differences in the joints of the constructed refractory walls. In addition, a fixed plate 7 is fixedly connected in the moving groove, and a gear 8 is rotatably connected on the fixed plate 7. The gear 8 meshes with multiple first gear teeth 9 and multiple second gear teeth 10. Multiple first gear teeth 9 are fixedly connected to a first connecting plate 11, and a moving plate 12 is fixedly connected to the first connecting plate 11. Two sliding columns 13 are fixedly connected to the bottom of the moving plate 12. Both sliding columns 13 are slidably connected to the second bricks 2. Rollers are rotatably connected to the bottom of the two sliding columns 13. Multiple second gear teeth 10 are fixedly connected to a second connecting plate 14. A limit plate 15 is installed in the moving groove, which facilitates the replacement of refractory bricks in the later stage, improves practicality, and allows all refractory bricks to be replaced in one position.

[0033] It should also be noted that the steel structure includes multiple first reinforcing bars 16, which are installed inside the first brick body 1 and the second brick body 2. The bottom ends of the multiple first reinforcing bars 16 are fixedly connected by multiple second reinforcing bars 17. The bottom ends of the multiple second reinforcing bars 17 are fixedly connected to a connecting frame 18. The bottom ends of the connecting frame 18 are fixedly connected to a third reinforcing bar 19. The bottom ends of the third reinforcing bar 19 are fixedly connected to a fourth reinforcing bar 20. This structure can better stabilize the refractory bricks, improve reliability, and has a lighter weight, higher reliability, and good vibration resistance and impact resistance. The first brick body 1 and the second brick body 2 are both arc-shaped bricks. The multiple first brick bodies 1 and the multiple second brick bodies 2 form a column. The first layer is composed of first brick bodies 1, and the rest are composed of second brick bodies 2. Rollers 21 are rotatably connected to the two sliding columns 13. Handles 22 are fixedly connected to the second connecting plate 14. The refractory material is magnesia, including 85-95% MgO, 2.8-4.5% SiO2, and 0.8-1.4% CaO.

[0034] In summary, when using this furnace refractory brick, firstly, multiple first bricks 1 are connected to form a base, and then second bricks 2 are placed and connected sequentially. Each layer is slidably connected by rollers 21. The second connecting plate 14 is slidable by the handle 22, and the first connecting plate 11 is moved up and down by the gear 8 for disassembly. The multiple first bricks 1 are connected to each other by connecting components, and the multiple second bricks 2 are connected to each other by connecting components. When refractory brick production is required, the components of the aggregate are added to a mixer according to the above-mentioned weight proportions and mixed evenly to obtain an aggregate mixture. Then, the components of the powder are added to a mixer according to the above-mentioned weight proportions and mixed evenly to obtain a powder mixture. Finally, the components of the binder are added to a mixer according to the above-mentioned weight proportions and mixed evenly to obtain a binder mixture. Water is added to prepare a mixed slurry, with the water amount being 8-12% of the aggregate weight. The aggregate mixture and the mixed slurry are then introduced into a mixer and stirred to obtain aggregate. The aggregate is then placed into a mold to obtain refractory bricks. The raw materials for the refractory bricks used in this furnace are composed of 70-100 parts of aggregate, 25-34 parts of powder, and 8-14 parts of binder by weight. The aggregate is composed of 16-20 parts of light-burned dolomite, 20-28 parts of magnesite ore, 21-25 parts of chromite ore, and 13-22 parts of clay clinker by weight. The powder is composed of 6-9 parts of beryllium oxide, 15-19 parts of sillimanite powder, and 1-3 parts of aluminum titanate by weight. The binder is composed of 1-3 parts of light-burned high-alumina bauxite powder, 5-7 parts of clay, and 2-4 parts of magnesium phosphate cementing material by weight.

[0035] It should also be noted that the refractory bricks used in this furnace have high erosion resistance, high compressive strength, and low surface roughness, which can prevent the refractory bricks from falling off due to impact during the rotation of the rotary kiln. The low surface roughness and strong corrosion resistance of the refractory bricks reduce the friction of materials on the inner wall of the rotary kiln, thereby effectively preventing the phenomenon of material accumulation and ring formation caused by high friction adhering to the refractory bricks. The refractory coating on the surface of the refractory bricks has good thermal conductivity, which can effectively prevent the ring formation caused by the temperature difference between the material and the kiln wall.

[0036] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A furnace refractory brick, comprising: The first brick (1) is characterized by: It also includes a second brick body (2) and a connecting assembly. Steel structures are installed inside both the first brick body (1) and the second brick body (2). The first brick body (1) and the second brick body (2) are slidably connected. Moving grooves and connecting grooves are provided on both the first brick body (1) and the second brick body (2). The connecting assembly includes a connecting block (3), which is detachably connected to a connecting groove. Limiting grooves are provided at both the upper and lower ends of the connecting groove. A screw (4) is threadedly connected to the connecting block (3), and a fixing block (5) is threadedly connected to the screw (4). Limiting blocks (6) matching the limiting grooves are rotatably connected to both the upper and lower ends of the fixing block (5). Slots are provided at both the upper and lower ends of the connecting block (3). Furthermore: A fixed plate (7) is fixedly connected inside the movable groove. A gear (8) is rotatably connected to the fixed plate (7). The gear (8) meshes with multiple first gear teeth (9) and multiple second gear teeth (10). A first connecting plate (11) is fixedly connected to the multiple first gear teeth (9). A movable plate (12) is fixedly connected to the first connecting plate (11). Two sliding columns (13) are fixedly connected to the bottom end of the movable plate (12). Both sliding columns (13) are slidably connected to the second brick (2). Rollers (21) are rotatably connected to the bottom end of the two sliding columns (13). A second connecting plate (14) is fixedly connected to the multiple second gear teeth (10). A limit plate (15) is installed inside the movable groove. A handle (22) is fixedly connected to the second connecting plate (14).

2. The furnace refractory brick according to claim 1, characterized in that: The steel structure includes a plurality of first reinforcing bars (16), which are installed inside the first brick body (1) and the second brick body (2). The bottom ends of the plurality of first reinforcing bars (16) are fixedly connected by a plurality of second reinforcing bars (17). The bottom ends of the plurality of second reinforcing bars (17) are fixedly connected to a connecting frame (18). The bottom ends of the connecting frame (18) are fixedly connected to a third reinforcing bar (19). The bottom ends of the third reinforcing bar (19) are fixedly connected to a fourth reinforcing bar (20).

3. The furnace refractory brick according to claim 2, characterized in that: Both the first brick (1) and the second brick (2) are arc-shaped bricks.

4. A furnace refractory brick according to claim 3, characterized in that: Multiple first bricks (1) and multiple second bricks (2) form a column, with the first layer composed of first bricks (1) and the rest composed of second bricks (2).

5. A method for producing furnace refractory bricks, characterized in that: The method of using a furnace refractory brick according to claim 4 includes the following steps: S1. When using this furnace refractory brick, firstly connect multiple first bricks (1) to form a base, then place and connect the second bricks (2) in sequence. Each layer is connected by a roller (21). The second connecting plate (14) is slid by the handle (22). The first connecting plate (11) is moved up and down by the gear (8) for disassembly. Multiple first bricks (1) are connected by the connecting component, and multiple second bricks (2) are connected by the connecting component. S2. When refractory bricks need to be produced, the components of the aggregate are put into a mixer and mixed evenly to obtain an aggregate mixture. Then, the components of the powder are put into a mixer and mixed evenly to obtain a powder mixture. The components of the binder are put into a mixer and mixed evenly to obtain a binder mixture. Water is added to the binder mixture to prepare a slurry. The amount of water added is 5-8% of the weight of the aggregate components. The aggregate mixture and the slurry are then introduced into a mixer and stirred to obtain aggregate. Finally, the aggregate is placed into a mold to obtain refractory bricks. S3. The raw materials for the refractory bricks used in this furnace are formulated according to the following proportions: 70-100 parts by weight of aggregate, 25-34 parts by weight of powder, and 8-14 parts by weight of binder. The aggregate is composed of 16-20 parts by weight of light-burned dolomite, 20-28 parts by weight of magnesite, 21-25 parts by weight of chromite, and 13-22 parts by weight of clay clinker. The powder is composed of 6-9 parts by weight of beryllium oxide, 15-19 parts by weight of sillimanite powder, and 1-3 parts by weight of aluminum titanate. The binder is composed of 1-3 parts by weight of light-burned high-alumina bauxite powder, 5-7 parts by weight of clay, and 2-4 parts by weight of magnesium phosphate cementing material.

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