Preparation process and equipment of surface anti-permeation dense type magnesium-aluminum-carbon brick
By using an integrated dry-wet mixing process and continuous mixing equipment, the problems of increased process and reduced efficiency caused by equipment separation in the preparation of magnesium-aluminate-carbon bricks have been solved, achieving efficient and low-cost brick preparation and avoiding dust leakage and cross-contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HAIWEI ZHONGXING HIGH-GRADE MAGNESIA BRICK CO LTD
- Filing Date
- 2025-12-05
- Publication Date
- 2026-06-02
AI Technical Summary
The existing mixing equipment in the preparation process of magnesium-aluminum-carbon bricks separates the process, which leads to increased steps, reduced efficiency, increased costs, and risks of dust leakage, raw material loss, and cross-contamination.
The process adopts a continuous dry-wet mixing system, which combines dry and wet mixing components to achieve continuous mixing of raw materials above the grinding disc. The injection of phenolic resin solution is used for strong crushing and kneading, reducing material transfer and preventing dust leakage and cross-contamination.
The process was streamlined, production efficiency was improved, costs were reduced, and dust leakage and raw material loss were prevented, ensuring the uniformity and high density of the bricks.
Smart Images
Figure CN122125802A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of refractory material production technology, and relates to the preparation of magnesium aluminate carbon bricks, particularly a process and equipment for preparing surface impermeable and dense magnesium aluminate carbon bricks. Background Technology
[0002] Magnesium alumina carbon bricks are refractory products made by using high-melting-point basic oxide magnesium oxide and high-melting-point amphoteric oxide aluminum oxide as aggregates, adding carbon, and using resin or asphalt as binders, through high-pressure molding and low-temperature heat treatment. They have the advantages of high refractoriness, high strength, erosion resistance, excellent thermal shock resistance and impermeability. They are an indispensable basic material in modern steelmaking industry, especially in secondary refining and continuous casting processes. Currently, the preparation process of magnesium alumina carbon bricks is as follows: after batching, the materials are mixed, then high-temperature pressing is carried out, and finally heat treatment is performed to complete the preparation.
[0003] Currently, in the mixing process for preparing surface impermeable dense magnesium aluminate carbon bricks, it is necessary to first add weighed aggregates (electrominated magnesia, corundum, etc.), fine powder, and dry raw materials such as graphite to a high-speed mixer. Then, the preliminarily mixed dry materials are transferred to a roller mill mixing device and a liquid binder (such as phenolic resin) is added and crushed into mud. This requires the use of two machines to complete the mixing process, which increases the process, reduces efficiency, and increases production costs. In addition, during the material transfer process, there is a risk of dust leakage, raw material loss, and cross-contamination. Summary of the Invention
[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a process and equipment for preparing surface-impermeable dense magnesium-aluminum-carbon bricks. The technical problem this invention aims to solve is: how to achieve the integration of mixing equipment, reduce processes, increase efficiency, reduce costs, and eliminate the need for material transfer, thereby preventing the risks of dust leakage, raw material loss, and cross-contamination.
[0005] The objective of this invention can be achieved through the following technical solutions: A process for preparing surface-resistant, dense magnesium-aluminum-carbon bricks includes the following steps: S1. Material Proportioning: Select 45wt%-65wt% fused magnesia, 15wt%-30wt% corundum, 5wt%-9wt% graphite, 1wt%-3wt% metallic silicon powder, 1wt%-3wt% metallic aluminum powder, 0.5wt%-2wt% nano carbon black, 1wt%-3wt% magnesium lactate, and 3wt%-4.5wt% phenolic resin; S2. Preparation of mud: The proportioned raw materials are conveyed to the surface of the collection plate and the round cover through the feed pipe. Then, the raw materials are initially mixed by the dry mixing component to achieve uniform distribution. The mixed dry raw materials are conveyed to the top of the grinding plate through the feed pipe. During the process of the dry raw materials passing through the feed pipe, the liquid injection device injects phenolic resin solution into the feed pipe. Then, the dry raw materials are crushed and mixed by the wet mixing component to form mud. S3. Uniform material distribution: The clumps of mud are evenly distributed into the mold of the hydraulic press by an automatic material distribution machine. S4. Static pressing: The clay material in the mold is pressed under high pressure by a hydraulic press; S5. Heat treatment: After static pressing, the clay material is subjected to low-temperature heat treatment in a drying kiln to form magnesium aluminum carbon bricks with the advantages of surface impermeability and density.
[0006] Using the above process, nano-carbon black can fill the tiny pores between aggregates, and magnesium lactate decomposes at high temperatures to generate refractory magnesium oxide, further blocking the pores. The combination of these two, along with optimized particle size distribution, constructs a microporous, dense structure that significantly hinders slag penetration. Furthermore, aluminum and silicon powders at high temperatures act as antioxidants, protecting graphite from oxidation, and react with carbon and magnesium oxide to form new phases. These high-temperature phases strengthen the brick structure, forming a robust ceramic bond, which, combined with the carbon formed after resin carbonization... By combining network reinforcements, the high-temperature strength and resistance to slag erosion of the bricks are significantly improved. In the dry mixing stage, the mixture is quickly mixed for 3-5 minutes, and in the wet mixing stage, it is slowly mixed for 10-15 minutes until there is no obvious color difference and the clay can be easily kneaded into a compact lump by hand. Through the continuous design of dry and wet mixing and automatic material distribution and static pressing, the ultimate uniformity and high density of the clay and brick blanks are ensured. After pressing, the bricks are dried in a kiln at 160-180℃ for 5-9 hours.
[0007] A surface impermeable dense magnesium aluminate carbon brick preparation equipment, applied to the aforementioned surface impermeable dense magnesium aluminate carbon brick preparation process, includes a middle cylinder fixed to the top of a base, a grinding disc rotating inside the base, a vertical shaft fixed to the middle of the bottom end of the grinding disc, and a reducer fixed to the bottom end of the vertical shaft. The wet mixing assembly includes a first rotary motor fixed inside the base frame, and the output end of the first rotary motor is fixedly connected to the other end of the reducer. Two fixing plates are fixedly provided on the inner wall of the bottom of the middle cylinder. The fixing plates are fixedly connected to a rotating shaft through a connecting assembly, and a rolling wheel is rotatably connected to the outer cylindrical surface of the middle part of the rotating shaft. The wet mixing assembly also includes a circular cover with an isosceles right triangle cross-section. A collection plate is fixedly provided on the inner wall of the middle cylinder. The cross-section of the collection plate is V-shaped, and a material passage pipe is fixedly provided at the bottom end of the collection plate. A positioning hole is provided inside the collection plate. A positioning rod is fixedly provided at the bottom end of the circular cover, and the positioning rod is slidably engaged in the positioning hole. The circular cover is located above the collection plate and contacts the top of the collection plate. The dry mixing assembly includes a second rotary motor fixed by a control assembly. An extension rod is fixedly provided at the output end of the second rotary motor, and a bottom cap is fixedly provided at the bottom end of the extension rod. The extension rod rotates inside the round cover, and multiple stirring racks are fixedly provided on the outer cylindrical surface of the extension rod. The stirring racks are located above the round cover. The liquid injection device includes a gear pump fixed to the outer wall of the middle cylinder. The liquid injection port of the gear pump is fixedly connected to a liquid injection pipe, which penetrates the outer wall of the middle cylinder and extends into the inside of the material passage pipe. A discharge port is opened inside the bottom end of the middle cylinder. Hydraulic valves are fixedly installed inside both the discharge port and the material passage pipe.
[0008] The working principle of this invention is as follows: The proportioned raw materials are conveyed through the feed pipe to the surface of the collecting plate and the round cover. A second rotary motor drives the extension rod and the stirring frame to rotate, thereby uniformly mixing the proportioned raw materials on the collecting plate and the round cover surface, completing the dry mixing. Then, through the control component, the second rotary motor is controlled to move upwards, causing the extension rod and the bottom cap to rise, which in turn causes the round cover to rise and detach from the collecting plate. The dry-mixed raw materials on the collecting plate and the round cover surface then fall along the feed pipe to the top of the grinding disc under gravity. During the downward movement of the dry-mixed raw materials along the feed pipe, a gear pump operates to uniformly pump the phenolic resin solution along the injection pipe. The solution is sprayed slowly and evenly into the feed pipe to contact the dry-mixed raw materials. Finally, the first rotary motor drives the vertical shaft and the grinding disc to rotate. The rotation of the grinding disc causes the raw materials on the surface of the grinding disc to rotate under the grinding wheel, so that the raw materials are crushed and mixed by the grinding wheel. This completes the continuous process of first dry mixing, then liquid injection, and immediate wet grinding. The dry raw materials are injected with phenolic resin solution as they fall into the grinding disc, and then undergo strong crushing and kneading. This device integrates mixing equipment, reduces processes, increases efficiency, reduces costs, and eliminates the need to transfer materials, preventing the risks of dust leakage, raw material loss, and cross-contamination.
[0009] The middle cylinder is movably connected to the top cover, and the top of the top cover is fixedly provided with a feed pipe. The bottom inner wall of the middle cylinder is fixedly provided with two guide plates and two scrapers.
[0010] The above structure encloses the middle cylinder to prevent powdery raw materials from escaping. During wet mixing, the mud rotates along the grinding disc and contacts the guide plate. Under the guidance of the guide plate, it enters below the grinding wheel, preventing some mud from not contacting the grinding wheel and increasing the wet mixing effect. After rolling and kneading, the mud that sticks to the grinding disc is scraped up by the scraper as the grinding disc rotates, preventing mud from being stuck in the grinding disc and causing difficulties in discharging.
[0011] Both ends of the fixed plate have sliding connecting rods inside, and the bottom ends of the two connecting rods are fixed to the outer cylindrical surfaces at both ends of the rotating shaft. A compression spring is fixed on the bottom outer cylindrical surface of the connecting rod, and the top end of the compression spring is fixed to the bottom end of the fixed plate.
[0012] With the above structure, when the mud is squeezed by the roller, the roller moves upward, which drives the rotating shaft to move upward. This causes the connecting rod to squeeze the compression spring. The elastic force of the compression spring pushes the rotating shaft in the opposite direction, driving the roller to squeeze the mud, thereby increasing the effect of crushing and kneading. It also allows the roller to have excess force space, so that the mud in all parts below the roller is subjected to uniform force.
[0013] The bottom of the stirring rack is fixedly provided with a pusher, and the bottom of the pusher is in contact with the top of the round cover and the collecting plate. Two round rods rotate inside one end of the pusher, and multiple shearing plates are fixed on the outer cylindrical surface of the round rods. Multiple scrambling holes are opened inside the shearing plates.
[0014] With the above structure, when the pusher rotates, it pushes the raw materials that are in contact with the round cover and the collecting plate to move up to the shearing plate. The shearing plate rotates and works in conjunction with the round rod to complete the combination of rotation and revolution to dry mix the raw materials, thereby increasing the dry mixing effect.
[0015] The control assembly includes a third rotary motor fixed to the outer wall of the fixed foot. The output end of the third rotary motor passes through and extends into the interior of the fixed foot. A gear is fixedly fitted onto the outer cylindrical surface of the middle part of the output end of the third rotary motor. A toothed plate slides inside the fixed foot and meshes with the gear. A limit hole is opened on one side of the fixed foot. A limit plate is fixed on one side of the toothed plate, and one end of the limit plate is slidably engaged inside the limit hole. The top of the toothed plate is fixedly connected to a second rotary motor.
[0016] With the above structure, the third rotary motor drives the gear to rotate, and the rotation of the gear pushes the toothed plate to move upward, which in turn drives the second rotary motor to move upward.
[0017] It also includes an automatic material distribution machine, one end of which is fixedly equipped with a screw conveyor, and the feed end of the screw conveyor is fixedly connected to the discharge port.
[0018] With the above structure, the wet-mixed mud enters the screw conveyor through the discharge port and then enters the automatic material distributor along the screw conveyor.
[0019] The automatic material feeder is fixedly connected to a hydraulic press at its discharge end. The hydraulic press is a 1200T hydraulic press.
[0020] With the above structure, the mud is evenly distributed into the mold of the hydraulic press along the discharge end of the automatic feeding machine.
[0021] The hydraulic press has a conveyor belt fixedly connected to its discharge end.
[0022] Using the above structure, the mud is statically pressed into brick shape by a hydraulic press.
[0023] A drying kiln is installed outside the conveyor belt.
[0024] Using the above structure, the statically pressed brick-shaped clay is conveyed along the conveyor belt to the drying kiln for heat treatment by a hydraulic press, thus completing the preparation of surface impermeable dense magnesium aluminate carbon bricks.
[0025] Compared with existing technologies, the preparation process and equipment for this surface-resistant, dense magnesium-aluminum-carbon brick have the following advantages: This invention utilizes a second rotary motor to drive an extension rod and a stirring frame to rotate, thereby uniformly mixing the proportioned raw materials on the collecting plate and the surface of the round cover to complete dry mixing. Then, a control component controls the second rotary motor to move upwards, causing the extension rod and bottom cap to rise, which in turn causes the round cover to rise and detach from the collecting plate. This allows the dry-mixed raw materials on the collecting plate and the round cover to fall under gravity along the feed pipe onto the grinding disc. As the dry-mixed raw materials move downwards along the feed pipe, a gear pump operates to evenly and slowly spray a phenolic resin solution along the injection pipe into the feed pipe to mix with the dry mixture. After the raw materials are mixed, the first rotary motor drives the vertical shaft and the grinding disc to rotate. The rotation of the grinding disc causes the raw materials on the surface of the grinding disc to rotate under the grinding wheel, so that the raw materials are crushed and mixed by the grinding wheel. This completes the continuous process of first dry mixing, then liquid injection, and immediate wet grinding. The dry raw materials are injected with phenolic resin solution as they fall into the grinding disc, and then undergo strong crushing and kneading. This device integrates the mixing equipment, reduces the process, increases efficiency, reduces costs, and eliminates the need to transfer materials, preventing the risk of dust leakage, raw material loss, and cross-contamination.
[0026] In this invention, during wet mixing, the mud rotates along the millstone and contacts the guide plate. Under the guidance of the guide plate, it enters below the millstone, preventing some mud from not contacting the millstone and increasing the wet mixing effect. After crushing and kneading, the mud that sticks to the millstone is scraped up by the scraper as the millstone rotates, preventing mud from being stuck in the millstone and causing difficulty in discharging.
[0027] In this invention, when the mud is squeezed by the grinding wheel, the grinding wheel moves upward, which in turn moves the rotating shaft upward. This causes the connecting rod to squeeze the compression spring. The elastic force of the compression spring pushes the rotating shaft in the opposite direction, causing the grinding wheel to squeeze the mud, thereby increasing the effect of crushing and kneading. It also allows the grinding wheel to have excess force space, so that the mud in all parts below the grinding wheel is subjected to uniform force.
[0028] In this invention, when the pusher rotates, it pushes the raw material that is in contact with the round cover and the collecting plate to move upward to the shearing plate. The shearing plate rotates and works in conjunction with the round rod to complete the combination of rotation and revolution to dry mix the raw material, thereby increasing the dry mixing effect. Attached Figure Description
[0029] Figure 1 This is a process flow diagram of the present invention.
[0030] Figure 2 This is a schematic diagram of the overall structure of the present invention.
[0031] Figure 3 This is an exploded view of the base and millstone structure in this invention.
[0032] Figure 4 This is a schematic diagram of the structure of the cylinder in this invention.
[0033] Figure 5 This is a schematic diagram of the dry mixing component in this invention.
[0034] Figure 6 This is the present invention. Figure 5 Enlarged view of the structure at point A in the middle.
[0035] Figure 7 This is a diagram showing the positional relationship between the collecting plate and the round cover in this invention.
[0036] Figure 8 This is an exploded view of the control component in this invention.
[0037] Figure 9 This is a diagram showing the positional relationship between the cylinder, top cover, and gear pump in this invention.
[0038] Figure 10 This is a diagram showing the positional relationship between the dry and wet mixing components and the control component in this invention.
[0039] Figure 11 This is the present invention. Figure 10 Enlarged view of the structure at point A in the middle. Figure 12 This is a product experimental performance test table in an embodiment of the present invention.
[0040] In the diagram, 101 is the middle cylinder; 102 is the base; 103 is the discharge port; 104 is the grinding disc; 105 is the vertical shaft; 106 is the base frame; 107 is the first rotary motor; 108 is the reducer; 109 is the grinding wheel; 110 is the rotating shaft; 111 is the fixing plate; 112 is the connecting rod; 113 is the compression spring; 114 is the guide plate; 115 is the scraper; 201 is the second rotary motor; 202 is the extension rod; 203 is the bottom cap; 204 is the mixing rack; 205 is the pusher; 206 is the round rod; and 207 is the shear. Cutting plate; 208, Scraping hole; 301, Collecting plate; 302, Feed pipe; 303, Positioning hole; 304, Round cover; 305, Positioning rod; 401, Fixing foot; 402, Third rotary motor; 403, Gear; 404, Gear plate; 405, Limiting plate; 406, Limiting hole; 501, Top cover; 502, Feed pipe; 601, Gear pump; 602, Liquid injection pipe; 701, Automatic material feeder; 702, Screw conveyor; 801, Hydraulic press; 802, Conveyor belt; 901, Drying kiln. Detailed Implementation
[0041] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0042] like Figures 1-11 As shown, the preparation process of this surface-resistant, dense magnesium-aluminum-carbon brick includes the following steps: S1. Material Proportioning: Select 45wt%-65wt% fused magnesia, 15wt%-30wt% corundum, 5wt%-9wt% graphite, 1wt%-3wt% metallic silicon powder, 1wt%-3wt% metallic aluminum powder, 0.5wt%-2wt% nano carbon black, 1wt%-3wt% magnesium lactate, and 3wt%-4.5wt% phenolic resin; S2. Preparation of mud: The proportioned raw materials are conveyed to the surface of the collection plate 301 and the round cover 304 through the feed pipe 502. Then, the raw materials are initially mixed by the dry mixing component to achieve uniform distribution. The mixed dry raw materials are conveyed to the top of the grinding disc 104 through the feed pipe 302. During the process of the dry raw materials passing through the feed pipe 302, the phenolic resin solution is injected into the feed pipe 302 by the liquid injection device. Then, the dry raw materials are crushed and mixed by the wet mixing component to form mud. S3. Uniform material distribution: The automatic material distribution machine 701 evenly distributes the clumps of mud into the mold of the hydraulic press 801. S4. Static pressing: The mud material in the mold is pressed under high pressure by the hydraulic press 801; S5. Heat treatment: After static pressing, the clay material is subjected to low-temperature heat treatment in drying kiln 901 to form magnesium aluminate carbon bricks with the advantages of surface impermeability and density.
[0043] Using the above process, nano-carbon black can fill the tiny pores between aggregates, and magnesium lactate decomposes at high temperatures to generate refractory magnesium oxide, further blocking the pores. The combination of these two, along with optimized particle size distribution, constructs a microporous, dense structure that significantly hinders slag penetration. Furthermore, aluminum and silicon powders at high temperatures act as antioxidants, protecting graphite from oxidation, and react with carbon and magnesium oxide to form new phases. These high-temperature phases strengthen the brick structure, forming a robust ceramic bond, which, combined with the carbon bond formed after resin carbonization, further enhances the brick structure. The composite network reinforces each other, significantly improving the high-temperature strength and resistance to slag erosion of the bricks. In the dry mixing stage, it is mixed quickly for 3-5 minutes, and in the wet mixing stage, it is mixed slowly for 10-15 minutes until there is no obvious color difference and the clay can be easily kneaded into a compact lump by hand. Through the continuous design of dry and wet mixing and automatic material distribution and static pressure molding, the ultimate uniformity and high density of the clay and brick blanks are ensured. After pressing and molding, the bricks are dried in kiln 901 and kept at 160-180℃ for 5-9 hours.
[0044] A surface impermeable dense magnesium aluminate carbon brick preparation equipment, applied to the surface impermeable dense magnesium aluminate carbon brick preparation process, includes a middle cylinder 101 fixed at the top of a base 102, a grinding disc 104 rotating inside the base 102, a vertical shaft 105 fixed at the bottom center of the grinding disc 104, and a reducer 108 fixed at the bottom of the vertical shaft 105. The wet mixing assembly includes a first rotary motor 107 fixed inside the base frame 106, and the output end of the first rotary motor 107 is fixedly connected to the other end of the reducer 108. Two fixing plates 111 are fixedly provided on the inner wall of the bottom of the middle cylinder 101. The fixing plates 111 are fixedly connected to the rotating shaft 110 through the connecting assembly, and a rolling wheel 109 is rotatably connected to the outer cylindrical surface of the middle part of the rotating shaft 110. The wet mixing assembly also includes a circular cover 304 with an isosceles right triangle cross-section. A collection plate 301 is fixedly provided on the inner wall of the middle cylinder 101. The cross-section of the collection plate 301 is V-shaped, and a material passage pipe 302 is fixedly provided at the bottom end of the collection plate 301. A positioning hole 303 is provided inside the collection plate 301. A positioning rod 305 is fixedly provided at the bottom end of the circular cover 304, and the positioning rod 305 is slidably engaged inside the positioning hole 303. The circular cover 304 is located above the collection plate 301 and contacts the top end of the collection plate 301. The dry mixing assembly includes a second rotary motor 201 fixed by a control assembly. An extension rod 202 is fixed at the output end of the second rotary motor 201, and a bottom cap 203 is fixed at the bottom end of the extension rod 202. The extension rod 202 rotates inside the round cover 304, and a plurality of stirring racks 204 are fixed on the outer cylindrical surface of the extension rod 202. The stirring racks 204 are located above the round cover 304. The liquid injection device includes a gear pump 601 fixed to the outer wall of the middle cylinder 101. The liquid injection port of the gear pump 601 is fixedly connected to a liquid injection pipe 602, and the liquid injection pipe 602 passes through the outer wall of the middle cylinder 101 and extends into the inside of the feed pipe 302. A discharge port 103 is opened inside the bottom end of the middle cylinder 101. Hydraulic valves are fixed inside both the discharge port 103 and the feed pipe 302.
[0045] The proportioned raw materials are conveyed through the feed pipe 502 to the surface of the collecting plate 301 and the round cover 304. The second rotary motor 201 drives the extension rod 202 and the mixing frame 204 to rotate, thereby uniformly mixing the proportioned raw materials on the surface of the collecting plate 301 and the round cover 304 to complete the dry mixing. Then, through the control component, the second rotary motor 201 is controlled to move upward, driving the extension rod 202 and the bottom cap 203 to rise, which in turn drives the round cover 304 to rise and detach from the collecting plate 301. The dry-mixed raw materials on the surface of the collecting plate 301 and the round cover 304 fall under the action of gravity along the feed pipe 302 to the top of the grinding disc 104. During the process of the dry-mixed raw materials moving downward along the feed pipe 302, the gear pump 601 operates to pump phenolic resin. The solution is sprayed evenly and slowly along the injection pipe 602 into the inside of the feed pipe 302, where it comes into contact with the dry-mixed raw materials. Finally, the first rotary motor 107 drives the vertical shaft 105 and the grinding disc 104 to rotate. The rotation of the grinding disc 104 causes the raw materials on its surface to rotate to the bottom of the grinding wheel 109, where they are crushed and mixed by the grinding wheel 109. This completes the continuous process of dry mixing followed by injection and immediate wet grinding. The dry raw materials are injected with phenolic resin solution as they fall into the grinding disc 104, and then subjected to strong crushing and kneading. This device integrates mixing equipment, reduces processes, increases efficiency, reduces costs, and eliminates the need to transfer materials, preventing the risks of dust leakage, raw material loss, and cross-contamination.
[0046] The middle cylinder 101 is movably connected to the top cover 501, and the top of the top cover 501 is fixedly provided with the feed pipe 502. The bottom inner wall of the middle cylinder 101 is fixedly provided with two guide plates 114 and two scrapers 115.
[0047] In this embodiment, the middle cylinder 101 is sealed to prevent the powdery raw materials from drifting away. During wet mixing, the mud rotates along the grinding disc 104 and contacts the guide plate 114. Under the guidance of the guide plate 114, it enters below the grinding wheel 109, preventing some mud from not contacting the grinding wheel 109 and increasing the wet mixing effect. After grinding and kneading, the mud that sticks to the grinding disc 104 is scraped up by the scraper 115 as the grinding disc 104 rotates, preventing the mud from getting stuck in the grinding disc 104 and causing difficulty in discharging.
[0048] Both ends of the fixed plate 111 have sliding connecting rods 112 inside, and the bottom ends of the two connecting rods 112 are fixed to the outer cylindrical surfaces at both ends of the rotating shaft 110. A compression spring 113 is fixed on the bottom outer cylindrical surface of the connecting rod 112, and the top end of the compression spring 113 is fixed to the bottom end of the fixed plate 111.
[0049] In this embodiment, when the mud is squeezed by the roller 109, the roller 109 moves upward, causing the rotating shaft 110 to move upward, which causes the connecting rod 112 to squeeze the compression spring 113. Under the elastic force of the compression spring 113, the rotating shaft 110 is pushed in the opposite direction to drive the roller 109 to squeeze the mud, thereby increasing the effect of crushing and kneading, and giving the roller 109 an overflow space, so that the mud in each part below the roller 109 is subjected to uniform force.
[0050] The bottom end of the stirring rack 204 is fixedly provided with a pusher 205, and the bottom end of the pusher 205 is in contact with the top end of the round cover 304 and the collecting plate 301. There are two round rods 206 rotating inside one end of the pusher 205. Multiple shearing plates 207 are fixed on the outer cylindrical surface of the round rods 206. Multiple scrambling holes 208 are opened inside the shearing plates 207.
[0051] In this embodiment, when the pusher 205 rotates, it pushes the raw material that is in contact with the round cover 304 and the collecting plate 301 to move and rise to the shear plate 207. The shear plate 207 rotates and cooperates with the round rod 206 to complete the combination of rotation and revolution to dry mix the raw material, thereby increasing the dry mixing effect.
[0052] The control assembly includes a third rotary motor 402 fixed to the outer wall of the fixed foot 401. The output end of the third rotary motor 402 extends through and into the interior of the fixed foot 401. A gear 403 is sleeved and fixed on the outer cylindrical surface in the middle of the output end of the third rotary motor 402. A toothed plate 404 slides inside the fixed foot 401 and meshes with the gear 403. A limiting hole 406 is opened on one side of the fixed foot 401. A limiting plate 405 is fixed on one side of the toothed plate 404, and one end of the limiting plate 405 is slidably engaged inside the limiting hole 406. The top end of the toothed plate 404 is fixedly connected to the second rotary motor 201.
[0053] In this embodiment, the third rotary motor 402 drives the gear 403 to rotate, and the rotation of the gear 403 pushes the toothed plate 404 to move upward, thereby driving the second rotary motor 201 to move upward.
[0054] It also includes an automatic material feeder 701, one end of which is fixedly equipped with a screw conveyor 702, and the feed end of the screw conveyor 702 is fixedly connected to the discharge port 103.
[0055] In this embodiment, the wet-mixed mud enters the screw conveyor 702 through the discharge port 103 and then enters the automatic material distributor 701 through the screw conveyor 702.
[0056] The automatic concrete placing machine 701 has a hydraulic press 801 fixedly connected to its discharge end. The hydraulic press 801 is a 1200T hydraulic press.
[0057] In this embodiment, the mud is evenly distributed along the discharge end of the automatic material feeder 701 into the mold of the hydraulic press 801.
[0058] A conveyor belt 802 is fixedly connected to the discharge end of the hydraulic press 801.
[0059] In this embodiment, the mud is statically pressed into a brick shape using a hydraulic press 801.
[0060] A drying kiln 901 is installed outside the conveyor belt 802.
[0061] In this embodiment, the statically pressed brick-shaped clay is conveyed along the conveyor belt 802 to the drying kiln 901 for heat treatment by the hydraulic press 801, thus completing the preparation of surface impermeable dense magnesium aluminate carbon bricks.
[0062] Working principle of the invention: The proportioned raw materials are conveyed through the feed pipe 502 to the surface of the collecting plate 301 and the round cover 304. The second rotary motor 201 drives the extension rod 202 and the stirring frame 204 to rotate. The rotation of the stirring frame 204 drives the pusher 205 to rotate. When the pusher 205 rotates, it pushes the raw materials in contact with the round cover 304 and the collecting plate 301 to the shear plate 207. The rotation of the shear plate 207, in conjunction with the rotation of the round rod 206, completes the combination of rotation and revolution, uniformly mixing the proportioned raw materials on the surface of the collecting plate 301 and the round cover 304, completing the dry mixing. Then, the third rotary motor 402 drives the gear 403 to rotate, and the rotation of the gear 403 pushes the toothed plate. 404 moves upward, which in turn drives the second rotary motor 201 to move upward. The upward movement of the second rotary motor 201 drives the extension rod 202 and the bottom cap 203 to rise, which in turn drives the round cover 304 to rise and detach from the collecting plate 301. This allows the dry-mixed material on the surface of the collecting plate 301 and the round cover 304 to fall along the feed pipe 302 under gravity and onto the grinding disc 104. As the dry-mixed material moves downward along the feed pipe 302, the gear pump 601 works to spray the phenolic resin solution evenly and slowly along the injection pipe 602 into the inside of the feed pipe 302 to contact the dry-mixed material. Finally, the first rotary motor 107 works to drive the vertical shaft 105 and the grinding disc 104 to rotate, and the grinding disc... The rotation of 104 causes the raw material on the surface of the grinding disc 104 to rotate to below the grinding wheel 109, causing the mud to squeeze the grinding wheel 109. As the mud squeezes the grinding wheel 109, it causes the grinding wheel 109 to move upwards, driving the rotating shaft 110 upwards. This causes the connecting rod 112 to squeeze the compression spring 113. The elastic force of the compression spring 113 pushes the rotating shaft 110 in the opposite direction, driving the grinding wheel 109 to squeeze the mud. This also provides the grinding wheel 109 with excess force space, ensuring that the mud in all parts below the grinding wheel 109 is evenly stressed. Simultaneously, the mud rotates along the grinding disc 104, contacting the guide plate 114. Under the guidance of the guide plate 114, it enters below the grinding wheel 109, preventing some mud from not contacting the grinding wheel 109 and increasing... In the wet mixing process, the clay that sticks to the grinding disc 104 after crushing and kneading is scraped off by the scraper 115 as the grinding disc 104 rotates, preventing the clay from getting stuck in the grinding disc 104. After wet mixing, the clay enters the screw conveyor 702 through the discharge port 103 and then enters the automatic spreading machine 701. The clay is evenly distributed into the mold of the hydraulic press 801 through the discharge end of the automatic spreading machine 701. The hydraulic press 801 statically presses the clay into a brick shape. The statically pressed brick-shaped clay is then transported along the conveyor belt 802 to the drying kiln 901 for heat treatment, completing the preparation of surface impermeable dense magnesium aluminate carbon bricks.
[0063] Experimental Example Under the same raw material ratio, the performance of the magnesia-carbon bricks in this embodiment was tested; Experimental Example 1 Prepare the mud mixture: In the dry mixing stage, mix quickly for 3 minutes, and in the wet mixing stage, mix slowly for 15 minutes; Heat treatment: The pressed bricks were kept at 160℃ for 9 hours in drying kiln 901.
[0064] Experiment Example 2 Prepare the mud mixture: In the dry mixing stage, mix quickly for 5 minutes, and in the wet mixing stage, mix slowly for 10 minutes; Heat treatment: The pressed bricks were kept at 160℃ for 5 hours in drying kiln 901.
[0065] Experimental Example 3 Prepare the mud mixture: In the dry mixing stage, mix quickly for 4 minutes, and in the wet mixing stage, mix slowly for 12 minutes; Heat treatment: The pressed bricks were kept at 160℃ for 7 hours in drying kiln 901.
[0066] To test product performance, the static crucible method was used to test key parameters. The test results are as follows: Figure 12 .
[0067] In summary, by setting up an integrated dry and wet mixing device inside the middle cylinder 101, and cooperating with the control components to control the round cover 304 to rise and detach from the collection plate 301, the dry-mixed raw materials can be rolled and mixed along the feed pipe 302 to the surface of the grinding disc 104. At the same time, phenolic resin solution is injected as the raw materials fall along the feed pipe 302, completing a continuous process of first dry mixing, then liquid injection, and immediate wet grinding. This device integrates mixing equipment, reduces processes, increases efficiency, reduces costs, and eliminates the need to transfer materials, preventing the risks of dust leakage, raw material loss, and cross-contamination.
[0068] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.
Claims
1. A process for preparing surface-resistant, dense magnesium-aluminum-carbon bricks, characterized in that, Includes the following steps: S1. Material Proportioning: Select 45wt%-65wt% fused magnesia, 15wt%-30wt% corundum, 5wt%-9wt% graphite, 1wt%-3wt% metallic silicon powder, 1wt%-3wt% metallic aluminum powder, 0.5wt%-2wt% nano carbon black, 1wt%-3wt% magnesium lactate, and 3wt%-4.5wt% phenolic resin; S2, preparing mud: The proportioned raw materials are conveyed to the surface of the collecting plate (301) and the round cover (304) through the feed pipe (502). Then, the raw materials are initially mixed by the dry mixing component to achieve uniform distribution. The mixed dry raw materials are conveyed from the feed pipe (302) to the top of the grinding plate (104). During the process of the dry raw materials passing through the feed pipe (302), the phenolic resin solution is injected into the feed pipe (302) by the liquid injection device. Then, the dry raw materials are crushed and mixed by the wet mixing component to form mud. S3. Uniform material distribution: The clump of mud is evenly distributed into the mold of the hydraulic press (801) by the automatic material distribution machine (701); S4. Static pressing: The mud material in the mold is pressed under high pressure by a hydraulic press (801); S5. Heat treatment: After static pressing, the clay material is subjected to low-temperature heat treatment in a drying kiln (901) to form magnesium aluminate carbon bricks with the advantages of surface impermeability and density.
2. A surface-impermeable, dense magnesium-aluminum-carbon brick preparation device, characterized in that, The process for preparing surface impermeable dense magnesium aluminum carbon bricks according to claim 1 includes a middle cylinder (101) fixed at the top of a base (102), a grinding disc (104) rotating inside the base (102), a vertical shaft (105) fixed at the middle of the bottom end of the grinding disc (104), and a reducer (108) fixed at the bottom end of the vertical shaft (105). The wet mixing assembly includes a first rotary motor (107) fixed inside the base frame (106), and the output end of the first rotary motor (107) is fixedly connected to the other end of the reducer (108). Two fixing plates (111) are fixedly provided on the inner wall of the bottom of the middle cylinder (101). The fixing plates (111) are fixedly connected to a rotating shaft (110) through a connecting assembly, and a grinding wheel (109) is rotatably connected to the outer cylindrical surface of the middle part of the rotating shaft (110). The wet mixing assembly also includes a round cover (304) with an isosceles right triangle cross-section. A collection plate (301) is fixedly provided on the inner wall of the middle cylinder (101). The cross-section of the collection plate (301) is V-shaped, and a feed pipe (302) is fixedly provided at the bottom end of the collection plate (301). A positioning hole (303) is provided inside the collection plate (301). A positioning rod (305) is fixedly provided at the bottom end of the round cover (304), and the positioning rod (305) is slidably engaged inside the positioning hole (303). The round cover (304) is located above the collection plate (301) and contacts the top of the collection plate (301). The dry mixing assembly includes a second rotary motor (201) fixed by a control assembly. An extension rod (202) is fixed at the output end of the second rotary motor (201), and a bottom cap (203) is fixed at the bottom end of the extension rod (202). The extension rod (202) rotates inside the round cover (304), and a plurality of stirring racks (204) are fixed on the outer cylindrical surface of the extension rod (202). The stirring racks (204) are located above the round cover (304). The liquid injection device includes a gear pump (601) fixed to the outer wall of the middle cylinder (101). The injection port of the gear pump (601) is fixedly connected to an injection pipe (602), and the injection pipe (602) penetrates the outer wall of the middle cylinder (101) and extends into the inside of the feed pipe (302). The bottom end of the middle cylinder (101) is provided with a discharge port (103), and hydraulic valves are fixedly installed inside both the discharge port (103) and the feed pipe (302).
3. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 2, characterized in that, The middle cylinder (101) is movably connected to the top cover (501), and the top of the top cover (501) is fixedly provided with a feed pipe (502). The bottom inner wall of the middle cylinder (101) is fixedly provided with two guide plates (114) and two scrapers (115).
4. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 2, characterized in that, Both ends of the fixed plate (111) have sliding connecting rods (112), and the bottom ends of the two connecting rods (112) are fixed on the outer cylindrical surfaces at both ends of the rotating shaft (110). A compression spring (113) is fixed on the bottom outer cylindrical surface of the connecting rod (112), and the top end of the compression spring (113) is fixed to the bottom end of the fixed plate (111).
5. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 2, characterized in that, The bottom end of the stirring rack (204) is fixedly provided with a pusher (205), and the bottom end of the pusher (205) is in contact with the top end of the round cover (304) and the collecting plate (301). There are two round rods (206) rotating inside one end of the pusher (205). Multiple shearing plates (207) are fixed on the outer cylindrical surface of the round rods (206). Multiple scrambling holes (208) are opened inside the shearing plates (207).
6. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 2, characterized in that, The control assembly includes a third rotary motor (402) fixed to the outer wall of the fixed foot (401). The output end of the third rotary motor (402) extends through and into the interior of the fixed foot (401). A gear (403) is fixedly fitted onto the outer cylindrical surface of the middle part of the output end of the third rotary motor (402). A toothed plate (404) slides inside the fixed foot (401). The toothed plate (404) meshes with the gear (403). A limiting hole (406) is opened on one side of the fixed foot (401). A limiting plate (405) is fixed on one side of the toothed plate (404), and one end of the limiting plate (405) is slidably engaged inside the limiting hole (406). The top end of the toothed plate (404) is fixedly connected to the second rotary motor (201).
7. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 1, characterized in that, It also includes an automatic material feeder (701), one end of which is fixedly equipped with a screw conveyor (702), and the feed end of the screw conveyor (702) is fixedly connected to the discharge port (103).
8. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 7, characterized in that, The automatic material feeder (701) has a hydraulic press (801) fixedly connected to its discharge end. The hydraulic press (801) is a 1200T hydraulic press.
9. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 8, characterized in that, The hydraulic press (801) has a conveyor belt (802) fixedly connected to its discharge end.
10. The equipment for preparing surface-resistant, dense magnesium-aluminum-carbon bricks according to claim 9, characterized in that, A drying kiln (901) is provided outside the conveyor belt (802).