Production process and equipment of light-weight thermal-insulation magnesium-aluminum-carbon brick

Abstract

The application relates to the technical field of refractory materials, and discloses a production process and equipment of light-weight thermal-insulation magnesium-aluminum-carbon bricks, which comprises the following steps: S1, raw material proportioning: the raw material of the light-weight thermal-insulation magnesium-aluminum-carbon bricks is prepared from the following substances in parts by weight: 15-20 parts of nano carbon, 70-80 parts of magnesium-aluminum spinel, 5-10 parts of hollow microbeads and 3-5 parts of composite additives; S2, raw material pretreatment: the aggregate is crushed through a crushing device, oversized aggregate is screened out through a screening device, and then the aggregate is mixed through a mixing device; the transmission mechanism is arranged; the user pours the crushed aggregate into the feeding hopper; the aggregate enters the screening cylinder; the motor is started; the motor drives the driving rod to rotate; the driving rod drives the screening cylinder to rotate through the connecting frame; the aggregate meeting the standard is discharged from the filter holes on the surface of the screening cylinder; the aggregate falls through the discharging pipe; and the circumferential rotation of the screening cylinder can reduce the possibility that the filter holes are blocked by the aggregate.

Description

Technical Field

[0001] This invention relates to the field of refractory materials technology, specifically to a production process and equipment for lightweight thermal insulation magnesia-alumina-carbon bricks. Background Technology

[0002] Refractories are a class of inorganic non-metallic materials with a refractoriness of not less than 1580℃. Refractoriness refers to the Celsius temperature at which a conical specimen of a refractory material can resist high temperatures without softening or melting under no load. Lightweight insulating alumina-magnesia-carbon bricks are refractory materials made primarily from high-grade alumina bauxite or corundum sand, magnesia sand, and flake graphite, and belong to the category of refractory products in the metallurgical field.

[0003] A search revealed a Chinese patent document disclosing a raw material mixing and screening device for producing magnesia-carbon bricks [Announcement No.: CN223440334U]. This device includes a base, a mixing cylinder, a first screening frame, a second screening frame, and a feeding pipe. The mixing cylinder is mounted on the base, and the feeding pipe is connected to the outer wall of one end of the mixing cylinder via a connecting frame. The mixing cylinder contains a first screening frame and a second screening frame of different diameters. The feeding pipe communicates with the first screening frame, and the second screening frame is located outside the first screening frame. The raw materials in the first screening frame are stirred and screened by a first stirring blade, achieving initial screening. The raw materials in the second screening frame are screened a second time by a second stirring blade. The raw materials obtained from the second screening fall into the mixing cylinder, where a stirrer thoroughly mixes the materials to obtain the required raw materials for producing magnesia-carbon bricks. Screening and mixing are performed simultaneously, greatly improving the production efficiency of magnesia-carbon bricks.

[0004] In the production process of lightweight thermal insulation aluminum-magnesium-carbon bricks, screening equipment is used to ensure that the aggregate size meets the standard. However, the existing screening equipment has low screening efficiency, and the aggregate is easily stuck in the filter holes in the screening cylinder, resulting in ineffective screening and requiring a lot of time costs. To address this issue, we propose a production process and equipment for lightweight thermal insulation magnesium-aluminum-carbon bricks. Summary of the Invention

[0005] The purpose of this invention is to provide a production process and equipment for lightweight thermal insulation magnesium-aluminum-carbon bricks to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a production process for lightweight thermal insulation magnesium-aluminum-carbon bricks, comprising the following steps: S1. Raw material ratio: The raw materials of this lightweight thermal insulation magnesium aluminum carbon brick are prepared from the following parts by weight: 15-20 parts of nano carbon, 70-80 parts of magnesium aluminum spinel, 5-10 parts of hollow microspheres, and 3-5 parts of composite additives. S2. Raw material pretreatment: The aggregate is crushed by crushing equipment, and the oversized aggregate is screened out by screening equipment. Then it is mixed by mixing equipment. S3. Pressing and molding: The mixed raw materials are placed into the mold and pressed by a vacuum brick forming machine (pressure ≥1000T), with the pressure controlled at 55-150MPa. S4. Drying treatment: Take out the pressed brick blanks and dry them through drying equipment, with the temperature controlled at 180-250℃; S5. Sintering treatment: The dried brick blanks are placed in a kiln for sintering at a temperature of 1600-1900℃. S6. Cooling Inspection: After the sintered brick blanks are removed and allowed to cool naturally, they are then inspected.

[0007] Preferably, the size of the pulverized magnesium aluminum spinel particles in step S1 is ≤0.074mm.

[0008] Preferably, the composite additive in step S1 includes an antioxidant and a dispersant.

[0009] Preferably, the antioxidant is metallic silicon powder, and the dispersant is lignin sulfonate.

[0010] Preferably, the screening equipment used in step S2 is the lightweight thermal insulation magnesium-aluminum-carbon brick production equipment, which includes a shell, a screening cylinder inside the shell, a feeding hopper for loading materials fixedly installed on one side of the shell, a feeding pipe fixedly connected to the bottom of the shell, a support frame fixedly connected to the top of the shell, a compression box fixedly connected to the bottom of the support frame, a number of air jet pipes fixedly connected to the bottom of the compression box through a one-way pressure valve, and a transmission mechanism provided on one side of the shell. The transmission mechanism includes a mounting plate fixedly connected to one side of the housing. A motor is fixedly mounted on the top of one side of the mounting plate. The output end of the motor extends through to one side of the support frame and is fixedly connected to a drive rod. Three connecting frames are fixedly connected to the circumferential side of the drive rod. The outer surface of the connecting frames is fixedly connected to the inner wall of the screening cylinder. A vibration mechanism, which is fixedly mounted on the screening cylinder; A gas collection mechanism is fixedly mounted on a support frame.

[0011] Preferably, the vibration mechanism includes several vibration frames fixedly connected to the circumferential side of the screening cylinder. Vibration blocks are fixedly connected to both sides of each vibration frame. A linkage block is provided inside the vibration frame. A traction rod is fixedly connected to one side of each linkage block. A vibration spring is fixedly connected to one side of each linkage block. One end of the vibration spring is fixedly connected to the outer surface of the screening cylinder. One end of the traction rod extends through to one side of the vibration frame and is fixedly connected to a first pressing block. A second pressing block that cooperates with the first pressing block is fixedly connected to the top of the housing. Both sides of the linkage block are fixedly connected to sliding blocks. One end of the sliding block extends through to one side of the vibration frame. A striking rod is fixedly connected to one side of the sliding block, and one end of the striking rod is fixedly connected to one side of the vibration block.

[0012] Preferably, the gas collection mechanism includes a gas collection box fixedly connected to one side of the support frame, an air inlet pipe fixedly connected to one side of the gas collection box, a transmission pipe fixedly connected to the top of the gas collection box, and one end of the transmission pipe fixedly connected to one side of the compression box. The gas collection box is equipped with a piston plate inside. A push block is fixedly connected to the bottom of the piston plate. A push rod is fixedly connected to the bottom of the push block. A transmission block is fixedly connected to the bottom of the push rod. A cam is fixedly connected to the surface of the motor output end.

[0013] Preferably, a return spring is sleeved on the surface of the push rod, the top of the return spring is fixedly connected to the bottom of the air collection box, and the bottom of the return spring is fixedly connected to the top of the transmission block.

[0014] Preferably, a first one-way valve is fixedly installed on the surface of the intake pipe, and a second one-way valve is fixedly installed on the surface of the transmission pipe.

[0015] Preferably, the first extrusion block has sloping sides, and the second extrusion block has an arc-shaped side.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, through the setting of a transmission mechanism, allows the user to pour the crushed aggregate into the feeding hopper, after which the aggregate will enter the screening cylinder. At the same time, the motor is started, and the motor will drive the drive rod to rotate. The drive rod will drive the screening cylinder to rotate through the connecting frame. The aggregate that meets the standard will be discharged from the filter holes on the surface of the screening cylinder and then fall down through the discharge pipe. At the same time, the circumferential rotation of the screening cylinder can reduce the occurrence of aggregate clogging the filter holes. 2. This invention incorporates a vibration mechanism. When the screening cylinder rotates, it drives the first extrusion block in the vibration mechanism to rotate as well. When the sloping part of the first extrusion block contacts the arc-shaped part of the second extrusion block, the first extrusion block, under the influence of extrusion, drives the traction rod, linkage block, sliding block, and striking rod to move closer to the vibration spring. When the first extrusion block moves to a point where it no longer contacts the second extrusion block, the elastic force generated by the vibration spring pushes the linkage block, sliding block, and striking rod back to their original positions, causing the striking rod to strike the vibration block and generate vibration. The vibration force is then transmitted through the vibration frame to the inside of the screening cylinder, dislodging the aggregate stuck in the filter holes and further improving the screening efficiency. 3. This invention, through the setting of a gas collection mechanism, when the motor output end rotates, it drives the cam to rotate. When the cam's protruding end contacts the transmission block, under the influence of compression, the transmission block drives the push rod, push block, and piston plate to move upward, compressing the gas in the gas collection box. The gas is then sent through the transmission pipe into the compression box. When the cam rotates to the point where it no longer contacts the transmission block, the elastic force generated by the return spring pushes the transmission block, push rod, push block, and piston plate downward. At this time, the gas collection box is under negative pressure, and the gas enters the gas collection box through the air inlet pipe. This cycle continues, intermittently supplying gas to the compression box. When the gas in the compression box reaches the limit of the one-way pressure valve, the gas is ejected downward through the jet pipe. The compressed airflow impacts the screening cylinder, further generating vibration, preventing aggregate from getting stuck in the filter holes, and further improving the screening effect. Attached Figure Description

[0017] Figure 1 This is a process flow diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure in this invention; Figure 3 This is a side-view perspective view of the present invention; Figure 4 This is a perspective view taken in cross-section in this invention; Figure 5 This is a perspective view of the vibration mechanism in this invention; Figure 6 This is a perspective view of the screening cylinder in this invention; Figure 7 This is a perspective view of the gas collecting mechanism in this invention; Figure 8 This is a perspective view of the cross-section of the gas collection box in this invention.

[0018] In the diagram: 1. Shell; 2. Screening cylinder; 3. Feeding hopper; 4. Feeding pipe; 5. Support frame; 6. Compression box; 7. Jet pipe; 8. Mounting plate; 9. Motor; 10. Drive rod; 11. Connecting frame; 12. Vibrating frame; 13. Vibrating block; 14. Linkage block; 15. Traction rod; 16. Vibration spring; 17. First extrusion block; 18. Second extrusion block; 19. Sliding block; 20. Striking rod; 21. Air collection box; 22. Air inlet pipe; 23. Transmission pipe; 24. Piston plate; 25. Pushing block; 26. Pushing rod; 27. Transmission block; 28. Cam; 29. ​​Return spring; 30. First one-way valve; 31. Second one-way valve. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-8 As shown, Example 1: A production process for lightweight thermal insulation magnesium-aluminum-carbon bricks includes the following steps: S1. Raw material ratio: The raw materials of this lightweight thermal insulation magnesium aluminum carbon brick are prepared from the following parts by weight: 15-20 parts of nano carbon, 70-80 parts of magnesium aluminum spinel, 5-10 parts of hollow microspheres, and 3-5 parts of composite additives. S2. Raw material pretreatment: The aggregate is crushed by crushing equipment, and the oversized aggregate is screened out by screening equipment. Then it is mixed by mixing equipment. S3. Pressing and molding: The mixed raw materials are placed into the mold and pressed by a vacuum brick forming machine (pressure ≥1000T), with the pressure controlled at 55-150MPa. S4. Drying treatment: Take out the pressed brick blanks and dry them through drying equipment, with the temperature controlled at 180-250℃; S5. Sintering treatment: The dried brick blanks are placed in a kiln for sintering at a temperature of 1600-1900℃. S6. Cooling Inspection: After the sintered brick blanks are removed and allowed to cool naturally, they are then inspected.

[0021] The size of the crushed magnesium aluminum spinel particles in step S1 is ≤0.074mm.

[0022] The composite additive in step S1 includes antioxidants and dispersants.

[0023] The antioxidant is metallic silicon powder, and the dispersant is lignin sulfonate.

[0024] Using the above method, nano-carbon materials (0.1-100nm) are used as raw materials to replace traditional graphite, reducing the carbon content to ≤5%. At the same time, magnesium aluminum spinel (particle size ≤0.074mm) can form a nanostructure matrix, improving high-temperature stability; while hollow microspheres (5-10wt%) can reduce the bulk density and control the apparent porosity at 7%-10%, effectively improving the thermal insulation and thermal shock resistance of magnesium aluminum carbon bricks.

[0025] The screening equipment used in step S2 is the lightweight thermal insulation magnesium aluminum carbon brick production equipment, which includes a shell 1, a screening cylinder 2 inside the shell 1, a feeding hopper 3 for loading materials fixedly installed on one side of the shell 1, a feeding pipe 4 fixedly connected to the bottom of the shell 1, a support frame 5 fixedly connected to the top of the shell 1, a compression box 6 fixedly connected to the bottom of the support frame 5, and several air jet pipes 7 fixedly connected to the bottom of the compression box 6 through a one-way pressure valve. A transmission mechanism is provided on one side of the shell 1. The transmission mechanism includes a mounting plate 8 fixedly connected to one side of the housing 1. A motor 9 is fixedly mounted on the top of one side of the mounting plate 8. The output end of the motor 9 extends through to one side of the support frame 5 and is fixedly connected to a drive rod 10. Three connecting frames 11 are fixedly connected to the circumferential side of the drive rod 10. The outer surface of the connecting frame 11 is fixedly connected to the inner wall of the screening cylinder 2. Vibration mechanism, which is fixedly mounted on screening cylinder 2; The gas collection mechanism is fixedly mounted on the support frame 5.

[0026] In this embodiment, by setting up a transmission mechanism, the user pours the crushed aggregate into the feeding hopper 3, and then the aggregate enters the screening cylinder 2. At the same time, the motor 9 is started, and the motor 9 drives the drive rod 10 to rotate. The drive rod 10 drives the screening cylinder 2 to rotate through the connecting frame 11. The aggregate that meets the standard will be discharged from the filter holes on the surface of the screening cylinder 2 and then fall down through the discharge pipe 4. At the same time, the circumferential rotation of the screening cylinder 2 can reduce the occurrence of aggregate clogging the filter holes.

[0027] Example 2: The vibration mechanism includes several vibration frames 12 fixedly connected to the circumferential side of the screening cylinder 2. Vibration blocks 13 are fixedly connected to both sides of the vibration frame 12. A linkage block 14 is provided inside the vibration frame 12. A traction rod 15 is fixedly connected to one side of the linkage block 14. A vibration spring 16 is fixedly connected to one side of the linkage block 14. One end of the vibration spring 16 is fixedly connected to the outer surface of the screening cylinder 2. One end of the traction rod 15 passes through to one side of the vibration frame 12 and is fixedly connected to a first extrusion block 17. A second extrusion block 18 that cooperates with the first extrusion block 17 is fixedly connected to the top of the housing 1. Both sides of the linkage block 14 are fixedly connected to sliding blocks 19. One end of the sliding block 19 extends through to one side of the vibration frame 12. A striking rod 20 is fixedly connected to one side of the sliding block 19. One end of the striking rod 20 is fixedly connected to one side of the vibration block 13.

[0028] In this embodiment, a vibration mechanism is set up so that when the screening cylinder 2 rotates, it will drive the first extrusion block 17 in the vibration mechanism to rotate. When the sloping part of the first extrusion block 17 contacts the arc-shaped part of the second extrusion block 18, the first extrusion block 17 will drive the traction rod 15, linkage block 14, sliding block 19 and striking rod 20 to move closer to the vibration spring 16 due to the extrusion. When the first extrusion block 17 moves to the point where it is no longer in contact with the second extrusion block 18, the elastic force generated by the vibration spring 16 will push the linkage block 14, sliding block 19 and striking rod 20 to reset, so that the striking rod 20 will hit the vibration block 13 to generate vibration. Then the vibration force will be transmitted to the inside of the screening cylinder 2 through the vibration frame 12, shaking off the aggregate stuck in the filter holes, and further improving the screening efficiency.

[0029] The first extrusion block 17 has sloping sides, and the second extrusion block 18 has an arc-shaped side.

[0030] In this embodiment, a first extrusion block 17 and a second extrusion block 18 are provided. The sloping part of the first extrusion block 17 contacts the arc-shaped part of the second extrusion block 18. Under the influence of extrusion, the first extrusion block 17 will drive the traction rod 15, the linkage block 14, the sliding block 19 and the striking rod 20 to move towards the side closer to the vibration spring 16, thus playing a transmission role.

[0031] Example 3: The gas collection mechanism includes a gas collection box 21 fixedly connected to one side of the support frame 5. An air inlet pipe 22 is fixedly connected to one side of the gas collection box 21, and a transmission pipe 23 is fixedly connected to the top of the gas collection box 21. One end of the transmission pipe 23 is fixedly connected to one side of the compression box 6. The air collection box 21 is equipped with a piston plate 24. A push block 25 is fixedly connected to the bottom of the piston plate 24. A push rod 26 is fixedly connected to the bottom of the push block 25. A transmission block 27 is fixedly connected to the bottom of the push rod 26. A cam 28 is fixedly connected to the surface of the output end of the motor 9.

[0032] In this embodiment, a gas collection mechanism is set up. When the output end of the motor 9 rotates, it will drive the cam 28 to rotate. When the protruding end of the cam 28 contacts the transmission block 27, the transmission block 27 will drive the push rod 26, the push block 25 and the piston plate 24 to move upward due to the squeezing effect. This will squeeze the gas in the gas collection box 21 and allow the gas to enter the compression box 6 through the transmission pipe 23. When the cam 28 rotates to the point where it no longer contacts the transmission block 27, the elastic force generated by the return spring 29 will push the transmission block 27, the push rod 26, the push block 25 and the piston plate 24 to move downward. At this time, the gas collection box 21 is under negative pressure, and the gas will enter the gas collection box 21 through the air inlet pipe 22. This cycle will intermittently deliver gas to the compression box 6. When the gas in the compression box 6 reaches the limit of the one-way pressure valve, the gas will be sprayed downward through the jet pipe 7. The compressed airflow will hit the screening cylinder 2 and further generate vibration, preventing the aggregate from getting stuck in the filter holes and further improving the screening effect.

[0033] A return spring 29 is fitted on the surface of the push rod 26. The top of the return spring 29 is fixedly connected to the bottom of the air collection box 21, and the bottom of the return spring 29 is fixedly connected to the top of the transmission block 27.

[0034] In this embodiment, a reset spring 29 is provided. When the cam 28 rotates to the point where it is no longer in contact with the transmission block 27, the elastic force generated by the reset spring 29 will push the transmission block 27, the push rod 26, the push block 25 and the piston plate 24 downward, thus achieving the function of resetting.

[0035] A first one-way valve 30 is fixedly installed on the surface of the intake pipe 22, and a second one-way valve 31 is fixedly installed on the surface of the transmission pipe 23.

[0036] In this embodiment, a first one-way valve 30 and a second one-way valve 31 are provided. The first one-way valve 30 is a valve that can only allow air to enter the air inlet pipe 22 in the air collection box 21, and the second one-way valve 31 is a valve that can only allow air to enter the compression box 6. Therefore, when there is a negative pressure in the air collection box 21, the gas will enter the air collection box 21 through the air inlet pipe 22. When the gas in the air collection box 21 is compressed, the gas will enter the compression box 6 through the transmission pipe 23.

[0037] The working principle and usage process of this invention: The user pours the crushed aggregate into the feeding hopper 3, and then the aggregate enters the screening cylinder 2. At the same time, the motor 9 is started, and the motor 9 drives the drive rod 10 to rotate. The drive rod 10 drives the screening cylinder 2 to rotate through the connecting frame 11. The aggregate that meets the standard will be discharged from the filter holes on the surface of the screening cylinder 2 and then fall down through the discharge pipe 4. At the same time, the circumferential rotation of the screening cylinder 2 can reduce the occurrence of aggregate clogging the filter holes. As the screening cylinder 2 rotates, it drives the first extrusion block 17 in the vibration mechanism to rotate. When the sloping part of the first extrusion block 17 contacts the arc-shaped part of the second extrusion block 18, the first extrusion block 17 will drive the traction rod 15, linkage block 14, sliding block 19 and striking rod 20 to move closer to the vibration spring 16 due to the extrusion. When the first extrusion block 17 moves to the point where it is no longer in contact with the second extrusion block 18, the elastic force generated by the vibration spring 16 will push the linkage block 14, sliding block 19 and striking rod 20 to reset, so that the striking rod 20 will strike the vibration block 13 to generate vibration. Then the vibration force will be transmitted to the inside of the screening cylinder 2 through the vibration frame 12, shaking off the aggregate stuck in the filter holes and further improving the screening efficiency. When the output end of motor 9 rotates, it drives cam 28 to rotate. When the protruding end of cam 28 contacts transmission block 27, under the influence of compression, transmission block 27 will drive push rod 26, push block 25 and piston plate 24 to move upward, compressing the gas in gas collection box 21, so that the gas enters compression box 6 through transmission pipe 23. When cam 28 rotates to the point where it no longer contacts transmission block 27, the elastic force generated by return spring 29 will push transmission block 27, push rod 26, push block 25 and piston plate 24 downward. At this time, the gas collection box 21 is under negative pressure, and the gas will enter the gas collection box 21 through air inlet pipe 22. This cycle continues, intermittently supplying gas to compression box 6. When the gas in compression box 6 reaches the limit of one-way pressure valve, the gas will be sprayed downward from jet pipe 7. The compressed airflow hits the screening cylinder 2, which will further generate vibration, preventing aggregate from getting stuck in the filter holes and further improving the screening effect.

[0038] It should be noted that the motor 9 is a device or equipment existing in the prior art, or a device or equipment that can be implemented by the prior art, and the specific composition and principle of the power supply of the motor 9 are clear to those skilled in the art, so they will not be described in detail.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production process for lightweight thermal insulation magnesium-aluminum-carbon bricks, comprising the following steps: S1. Raw material ratio: The raw materials of this lightweight thermal insulation magnesium aluminum carbon brick are prepared from the following parts by weight: 15-20 parts of nano carbon, 70-80 parts of magnesium aluminum spinel, 5-10 parts of hollow microspheres, and 3-5 parts of composite additives. S2. Raw material pretreatment: The aggregate is crushed by crushing equipment, and the oversized aggregate is screened out by screening equipment. Then it is mixed by mixing equipment. S3. Pressing and molding: The mixed raw materials are placed into the mold and pressed by a vacuum brick forming machine (pressure ≥1000T), with the pressure controlled at 55-150MPa. S4. Drying treatment: Take out the pressed brick blanks and dry them through drying equipment, with the temperature controlled at 180-250℃; S5. Sintering treatment: The dried brick blanks are placed in a kiln for sintering at a temperature of 1600-1900℃. S6. Cooling Inspection: After the sintered brick blanks are removed and allowed to cool naturally, they are then inspected.

2. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 1, characterized in that: In step S1, the size of the crushed magnesium aluminum spinel particles is ≤0.074mm.

3. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 1, characterized in that: The composite additive in step S1 includes antioxidants and dispersants.

4. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 3, characterized in that: The antioxidant is metallic silicon powder, and the dispersant is lignin sulfonate.

5. The production process for lightweight thermal insulation magnesium-aluminum-carbon bricks according to any one of claims 1-4, characterized in that: The screening equipment used in step S2 is the lightweight thermal insulation magnesium aluminum carbon brick production equipment, including a shell (1), a screening cylinder (2) is provided inside the shell (1), a feeding hopper (3) for loading is fixedly installed on one side of the shell (1), a discharge pipe (4) is fixedly connected to the bottom of the shell (1), a support frame (5) is fixedly connected to the top of the shell (1), a compression box (6) is fixedly connected to the bottom of the support frame (5), and a number of air jet pipes (7) are fixedly connected to the bottom of the compression box (6) through a one-way pressure valve. A transmission mechanism is provided on one side of the shell (1). The transmission mechanism includes a mounting plate (8) fixedly connected to one side of the housing (1). A motor (9) is fixedly mounted on the top of one side of the mounting plate (8). The output end of the motor (9) extends through to one side of the support frame (5) and is fixedly connected to a drive rod (10). Three connecting frames (11) are fixedly connected to the circumferential side of the drive rod (10). The outer surface of the connecting frame (11) is fixedly connected to the inner wall of the screening cylinder (2). A vibration mechanism is fixedly mounted on the screening cylinder (2); Gas collection mechanism: The gas collection mechanism is fixedly mounted on the support frame (5).

6. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 5, characterized in that: The vibration mechanism includes several vibration frames (12) fixedly connected to the circumferential side of the screening cylinder (2). Vibration blocks (13) are fixedly connected to both sides of each vibration frame (12). A linkage block (14) is provided inside the vibration frame (12). A traction rod (15) is fixedly connected to one side of the linkage block (14). A vibration spring (16) is fixedly connected to one side of the linkage block (14). One end of the vibration spring (16) is fixedly connected to the outer surface of the screening cylinder (2). One end of the traction rod (15) extends through to one side of the vibration frame (12) and is fixedly connected to a first extrusion block (17). A second extrusion block (18) that cooperates with the first extrusion block (17) is fixedly connected to the top of the housing (1). Both sides of the linkage block (14) are fixedly connected to sliding blocks (19). One end of the sliding block (19) extends through to one side of the vibration frame (12). One side of the sliding block (19) is fixedly connected to a striking rod (20). One end of the striking rod (20) is fixedly connected to one side of the vibration block (13).

7. The production process for lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 6, characterized in that: The gas collection mechanism includes a gas collection box (21) fixedly connected to one side of the support frame (5), an air inlet pipe (22) fixedly connected to one side of the gas collection box (21), a transmission pipe (23) fixedly connected to the top of the gas collection box (21), and one end of the transmission pipe (23) fixedly connected to one side of the compression box (6). The gas collection box (21) is equipped with a piston plate (24), a push block (25) is fixedly connected to the bottom of the piston plate (24), a push rod (26) is fixedly connected to the bottom of the push block (25), a transmission block (27) is fixedly connected to the bottom of the push rod (26), and a cam (28) is fixedly connected to the surface of the output end of the motor (9).

8. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 7, characterized in that: A return spring (29) is fitted on the surface of the push rod (26). The top of the return spring (29) is fixedly connected to the bottom of the air collection box (21), and the bottom of the return spring (29) is fixedly connected to the top of the transmission block (27).

9. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 7, characterized in that: A first one-way valve (30) is fixedly installed on the surface of the air intake pipe (22), and a second one-way valve (31) is fixedly installed on the surface of the transmission pipe (23).

10. The production process of lightweight thermal insulation magnesium-aluminum-carbon bricks according to claim 6, characterized in that: The first extrusion block (17) has sloping sides, and the second extrusion block (18) has an arc-shaped side.

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