Preparation equipment of low thermal conductivity composite mullite for lime rotary kiln

Abstract

The application discloses a kind of preparation equipment of low thermal conductivity composite mullite for lime rotary kiln, it is installed in the lower mould of the inside of the frame, the inside of the frame is located above the lower mould and is provided with upper mould;Support frame, the support frame is supported on ground and is located at the two sides of the frame, the top of the support frame is fixedly connected with two support seats, and the inside of two support seats is connected with sliding frame by driving structure;Support plate, the support plate is fixedly connected at the top of one of the support frames, the top of the support plate is provided with material frame, and the material frame is fixedly connected with the sliding frame;In the application, by setting segmented extruder, through the progressive extrusion process of "one extrusion→second extrusion→final mold pressing", the design of force increment (one extrusion force < second extrusion force < final pressing force) is matched, the gradual transformation of material from loose to dense is realized.

Description

Technical Field

[0001] This invention relates to the field of composite mullite preparation technology, and in particular to a preparation device for low thermal conductivity composite mullite for lime rotary kilns. Background Technology

[0002] Low thermal conductivity composite mullite is a type of mullite ( High-performance composite refractory and heat insulation materials are prepared by combining low thermal conductivity phases (such as hollow microspheres, porous ceramic particles, nano-insulating phases, or introducing controllable pore structures) with mullite as the matrix. They combine the high temperature resistance and low thermal conductivity of mullite and have important application value in the field of high temperature industrial heat insulation. They are often used in the construction of lime rotary kilns.

[0003] In the traditional preparation process of low thermal conductivity composite mullite, the mixed raw materials are usually poured directly into the mold of a pressing device, and then pressed into shape in one step by closing the upper and lower molds. However, because the mixture contains particles of different sizes and components with large density differences (such as lightweight polylight mullite microporous material and dense high-alumina fine powder), these components have significant differences in flow properties. During the process of pouring the raw materials into the mold and pressing, "segregation" is prone to occur due to the difference in flowability. Fine particles or heavy components with better flowability tend to aggregate towards the edge of the mold, while coarse particles or lightweight components with poorer flowability tend to accumulate in the central area. This ultimately leads to uneven material density in different areas of the mold (e.g., the edge area is denser due to the aggregation of heavy / fine particles, while the central area is relatively loose due to the accumulation of lightweight / coarse particles), which seriously affects the structural stability and performance consistency of the product. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the preparation equipment of low thermal conductivity composite mullite for lime rotary kiln, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a preparation device for low thermal conductivity composite mullite for lime rotary kilns, which solves the problem that "segregation" easily occurs in the mixture due to differences in fluidity during traditional one-time pressing, resulting in uneven density in different areas of the mold (such as dense edges and loose center).

[0007] To solve the above technical problems, the present invention provides the following technical solution: including the following structure: including: a frame, the frame including a lower mold installed on the inner side of the frame, and an upper mold disposed on the inner side of the frame above the lower mold;

[0008] A support frame, which is supported on the ground and located on both sides of the frame, has two support seats fixedly connected to the top of the support frame, and a sliding frame is connected to the inner side of the two support seats through a drive structure;

[0009] A support plate is fixedly connected to the top of one of the support frames, and a material frame is provided on the top of the support plate, and the material frame is fixedly connected to the sliding frame;

[0010] A hopper is disposed on the top of the material frame, and fixed seats are fixedly connected to both sides of the hopper, and the fixed seats are installed on the top of the support base;

[0011] The segmented extruder is located inside the hopper and is used to extrude the mixture entering the hopper in segments. The segmented extruder includes an arched slope fixedly connected to the inside of the hopper and two extrusion buckets, and the two extrusion buckets are respectively arranged on one side of the arched slope.

[0012] The oscillating feeder, located at the end of the extrusion hopper, is used to backfill the material that slides off the extrusion hopper.

[0013] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the segmented extruder further includes a fixed plate fixedly connected to the inner side of the hopper, a hydraulic cylinder is installed on the top of the fixed plate, the output end of the hydraulic cylinder extends through to the bottom of the fixed plate and is fixedly connected to a power plate, multiple sets of pressure columns are fixedly connected to the bottom of the power plate, each set of pressure columns has multiple columns, the extrusion hopper has a through hole extending to the bottom, and the through hole corresponds one-to-one with each pressure column, the bottom of the extrusion hopper is provided with an automatic closing component, and the bottom of the extrusion hopper is provided with a secondary extrusion component.

[0014] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the extrusion hopper is inclined, the through holes arranged in each group are staggered in pairs, the height of the through holes arranged in the longitudinal direction is arranged from high to low, and the length of the pressure column for longitudinal discharge is arranged from high to low.

[0015] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the automatic closing assembly includes an abutment plate disposed at the bottom of the extrusion hopper, a rectangular block fixedly connected to one end of the extrusion hopper, an L-shaped frame slidably connected to the outer wall of the rectangular block, a power spring installed between the L-shaped frame and the extrusion hopper, one end of the L-shaped frame fixedly connected to the abutment plate, an arc-shaped block fixedly connected to the front end of the abutment plate, and a trapezoidal block fixedly connected to one side of the power plate above the arc-shaped block.

[0016] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the secondary extrusion assembly includes an auxiliary frame fixedly connected to the inner side of the hopper, and the auxiliary frame is disposed at the bottom of the contact plate. Multiple partitions are fixedly connected to the inner side of the auxiliary frame, and the multiple partitions are equally distributed on the inner side of the auxiliary frame. Each set of longitudinally arranged through holes is located between every two partitions.

[0017] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the secondary extrusion assembly further includes two reciprocating screws rotatably connected between the two auxiliary frames. A spur gear is fixedly connected to the outer wall of each of the two reciprocating screws, and the two spur gears are meshed with each other. A second drive motor is installed inside one of the auxiliary frames. The output end of the second drive motor passes through to the outside of the auxiliary frame and is fixedly connected to one of the reciprocating screws. An extrusion plate is slidably connected between every two partitions. A connecting plate is threadedly connected to the outer wall of the reciprocating screw. Multiple power rods are fixedly connected to the inner side of the connecting plate. One end of each power rod passes through to the inside of the auxiliary frame and is fixedly connected to one of the extrusion plates.

[0018] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, wherein: a limiting groove matching the power rod is provided on the inner side of the auxiliary frame, and the extrusion plate is slidably connected to the auxiliary frame through the power rod.

[0019] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the bottom of the auxiliary frame is fixedly connected to two suspension seats, the inner side of the two suspension seats is rotatably connected to a rotating block, the top of the rotating block is fixedly connected to a rotating plate, and the rotating plate is set at the feed port of the auxiliary frame to block the feed. A third drive motor is installed on one side of one of the suspension seats, and the output end of the third drive motor is fixedly connected to the rotating block.

[0020] As a preferred embodiment of the preparation equipment for low thermal conductivity composite mullite in a lime rotary kiln according to the present invention, the oscillating feeding component includes an oscillating plate rotatably connected to the inner side of the hopper, a connecting shaft is fixedly connected to both sides of the oscillating plate, one end of the connecting shaft passes through the inner side of the hopper and is rotatably connected to the hopper, a first drive motor is installed on one side of the hopper, and the output end of the first drive motor passes through the inner side of the hopper and is fixedly connected to one of the connecting shafts.

[0021] The beneficial effects of this invention are:

[0022] By setting up a segmented extruder and using a progressive extrusion process of "primary extrusion → secondary extrusion → final die pressing," coupled with an increasing force design (primary extrusion force < secondary extrusion force < final pressing force), the material is gradually transformed from loose to dense.

[0023] One extrusion (pressing column) initially compacts the loose material in the through hole to form a basic molded body, preventing the material from breaking due to being too loose during subsequent extrusion;

[0024] Secondary extrusion (extrusion plate) further compacts the material within the partitioned space, reducing internal porosity and increasing density and strength;

[0025] The final mold pressing completes the final shaping with maximum force, ensuring product density and structural stability, and reducing internal defects.

[0026] By setting up an automatic closing component (such as a contact plate or trapezoidal block), the automatic closing component controls the timing of material falling through mechanical linkage, ensuring that the material after one squeeze accurately falls into the auxiliary frame and avoiding leakage or positional deviation.

[0027] After the second extrusion, the opening and closing of the rotating plate and the reciprocating movement of the material frame work together to accurately push the material into the lower die, realizing automated transmission from extrusion to final molding, reducing manual intervention, ensuring material position accuracy, and improving pressing consistency.

[0028] By incorporating a swinging material feeding component, when material slides along the top of the extrusion hopper 12, excessive material may slip off in certain areas due to vibration, slope, or other factors, resulting in insufficient filling of the through holes inside the extrusion hopper 12 (such as some through holes lacking material). The swinging plate 17, through its 90-degree reciprocating swing, can push this "excessively slipped" material back to the top of the extrusion hopper 12 and replenish it into the through holes, ensuring that each through hole is filled with sufficient material. This avoids problems such as voids and incomplete forming during a single extrusion due to insufficient material, thus guaranteeing the quality of the basic extrusion process.

[0029] The reciprocating oscillation of the oscillating plate can "secondarily sort" the material at the top of the extrusion hopper, preventing material from accumulating in localized areas (such as the edge or bottom of the extrusion hopper). Instead, it guides the dispersed material back to the through-hole areas that need filling, improving the uniformity of material distribution within the extrusion hopper. At the same time, this process can recover excess material that might otherwise have slipped to the bottom of the hopper, reducing raw material waste and improving material utilization. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a side view of the present invention.

[0033] Figure 3 This is a schematic diagram of the top structure of the support frame of the present invention.

[0034] Figure 4 This is a cross-sectional view of the hopper and material frame of the present invention.

[0035] Figure 5 This is a schematic diagram of the internal structure of the hopper of the present invention.

[0036] Figure 6 This is a schematic diagram of the segmented extruder structure of the present invention.

[0037] Figure 7 This is a schematic diagram of the bottom structure of the auxiliary frame of the present invention.

[0038] Figure 8 This is a schematic diagram of the secondary extrusion assembly structure of the present invention.

[0039] In the diagram: 1. Frame; 2. Support frame; 3. Support base; 4. Upper die; 5. Lower die; 6. Sliding frame; 7. Material frame; 8. Support plate; 9. Hopper; 10. Fixed base; 11. Arched slope; 12. Extrusion hopper; 13. Fixed plate; 14. Hydraulic cylinder; 15. Power plate; 16. Pressure column; 17. Swing plate; 18. Auxiliary frame; 19. Partition plate; 20. Rotating plate; 21. Trapezoidal block; 22. First drive motor; 23. Connecting shaft; 24. Contact plate; 25. Arc block; 26. Rectangular block; 27. L-shaped frame; 28. Reciprocating screw; 29. ​​Spur gear; 30. Second drive motor; 31. Extrusion plate; 32. Power spring; 33. Suspension base; 34. Third drive motor; 35. Rotating block; 36. Connecting plate; 37. Power rod. Detailed Implementation

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0043] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0044] A preparation process for low thermal conductivity composite mullite for lime rotary kilns based on the preparation equipment of the present invention is characterized by comprising the following raw materials in parts by weight: 35-50 parts mullite, 15-25 parts cordierite, 8-12 parts alumina hollow spheres, 5-10 parts silicon carbide, and 0.5-1.2 parts sintering aid.

[0045] The sintering aid is prepared as follows: nano-silica is added to an aluminum fluoride solution with a mass concentration of 15-25%, and ultrasonically dispersed for 30-40 minutes to obtain a dispersion. Titanate coupling agent is added to the dispersion, and ultrasonic dispersion is continued for 20-30 minutes to obtain the sintering aid.

[0046] It also includes the following steps:

[0047] S1. Mix mullite, cordierite, hollow alumina spheres, silicon carbide and sintering aids according to the weight parts, put them into a planetary ball mill, and ball mill them for 2-3 hours with ethanol as the medium, and then dry them to obtain the mixture;

[0048] S2. Load the mixture into the lower mold 5, place it in the frame 1, and press it under a pressure of 180-220MPa for 3-5 minutes to obtain the green body;

[0049] S3. Place the billet in a box furnace for pre-sintering treatment, heat it to 800-900℃ at a rate of 5-8℃ / min, hold it for 2-3 hours, and obtain the pre-sintered billet after natural cooling.

[0050] S4. The pre-sintered blank is coated with a zirconium dioxide film by magnetron sputtering. After coating, it is placed in a silica sol curing solution and immersed in a vacuum of 0.08-0.1MPa for 1-2 hours. After removal, it is dried at 110-120℃ for 3-4 hours to obtain the coated blank.

[0051] S5. Place the coated blank in a vacuum high-temperature sintering furnace, first heat it to 1200-1300℃ at a rate of 3-5℃ / min, hold it for 1-2 hours, then heat it to 1450-1550℃ at a rate of 2-3℃ / min, hold it for 4-6 hours, and then cool it with the furnace to obtain low thermal conductivity composite mullite for lime rotary kilns.

[0052] Reference Figures 1-8This invention provides a preparation device for low thermal conductivity composite mullite in a lime rotary kiln. The frame 1 includes a lower mold 5 installed inside the frame 1, and an upper mold 4 located above the lower mold 5 on the inner side of the frame 1; a support frame 2, which is supported on the ground and located on both sides of the frame 1. Two support seats 3 are fixedly connected to the top of the support frame 2, and a sliding frame 6 is connected to the inner side of the two support seats 3 through a drive structure; a support plate 8, which is fixedly connected to the top of one of the support frames 2, and a material frame 7 is provided on the top of the support plate 8, and the material frame 7 is fixedly connected to the sliding frame 6; and a hopper 9, which is located on the top of the material frame 7, and fixed seats 10 are fixedly connected to both sides of the hopper 9, and the fixed seats 10 are installed on the top of the support seats 3.The segmented extruder, located inside the hopper 9, is used to segmentally extrude the mixture entering the hopper 9. The segmented extruder includes an arched ramp 11 fixedly connected to the inside of the hopper 9 and two extrusion hoppers 12, with the two extrusion hoppers 12 respectively positioned on one side of the arched ramp 11. The segmented extruder also includes a fixed plate 13 fixedly connected to the inside of the hopper 9. A hydraulic cylinder 14 is mounted on the top of the fixed plate 13, and a power plate 15 is fixedly connected to the bottom of the fixed plate 13 through the output end of the hydraulic cylinder 14. Multiple sets of pressure columns 16 are fixedly connected to the bottom of the power plate 15, with each set of pressure columns having multiple columns. The extrusion hoppers 12 have through holes extending to the bottom. Each hole corresponds one-to-one with a pressure column 16. An automatic closing assembly is installed at the bottom of the extrusion hopper 12, and a secondary extrusion assembly is also installed at the bottom of the extrusion hopper 12. The extrusion hopper 12 is tilted, and each group of horizontally arranged through holes is staggered in pairs. The heights of the vertically arranged through holes are arranged sequentially from high to low, and the lengths of the vertically discharging pressure columns 16 are arranged sequentially from high to low. The automatic closing assembly includes an abutment plate 24 at the bottom of the extrusion hopper 12. A rectangular block 26 is fixedly connected to one end of the extrusion hopper 12, and an L-shaped frame 27 is slidably connected to the outer wall of the rectangular block 26. A power spring 32 is installed between the L-shaped frame 27 and the extrusion hopper 12, and one end of the L-shaped frame 27 is fixed to the abutment plate 24. The connection includes an arc-shaped block 25 fixedly connected to the front end of the contact plate 24, and a trapezoidal block 21 fixedly connected to one side of the power plate 15 above the arc-shaped block 25. The secondary extrusion assembly includes an auxiliary frame 18 fixedly connected to the inside of the hopper 9, and the auxiliary frame 18 is located at the bottom of the contact plate 24. Multiple partitions 19 are fixedly connected to the inside of the auxiliary frame 18, and the multiple partitions 19 are evenly distributed on the inside of the auxiliary frame 18. Each set of longitudinally arranged through holes is located between every two partitions 19. The secondary extrusion assembly also includes two reciprocating screws 28 rotatably connected between the two auxiliary frames 18. A spur gear 29 is fixedly connected to the outer wall of each of the two reciprocating screws 28. The 29 are interlocked. A second drive motor 30 is installed inside one of the auxiliary frames 18. The output end of the second drive motor 30 passes through the outside of the auxiliary frame 18 and is fixedly connected to one of the reciprocating screws 28. A pressing plate 31 is slidably connected between every two partitions 19. A connecting plate 36 is threaded to the outer wall of the reciprocating screw 28. Multiple power rods 37 are fixedly connected to the inner side of the connecting plate 36. One end of each power rod 37 passes through the inside of the auxiliary frame 18 and is fixedly connected to a pressing plate 31. A limiting groove matching the power rod 37 is opened on the inner side of the auxiliary frame 18. The pressing plate 31 is slidably connected to the auxiliary frame 18 through the power rod 37.

[0053] The inner side of the contact plate 24 is provided with a guide hole that matches the through hole inside the extrusion hopper 12. A vibration motor can be installed at the bottom of the arched slope 11, so that the material falls into the top of the arched slope 11 and slides down through the vibration generated by the vibration motor. First, when the mixed material needs to be pressed into shape, the mixed material is poured into the hopper 9 one after another. Under the action of the arched slope 11, the material can slide towards the extrusion hopper 12. Then, the hydraulic cylinder 14 is started intermittently by the PLC controller. After the material slides towards the extrusion hopper 12 for a period of time, it can fill the through hole inside the extrusion hopper 12 during the sliding process. The hydraulic cylinder 14 is started, and the output end of the hydraulic cylinder 14 drives the power plate 15 to drive the pressure column 16 downward. The pressure column 16 is moved so that it is inserted into the through hole inside the extrusion hopper 12 to perform a first extrusion operation on the material. After the pressure column 16 extrudes the material accumulated inside the through hole for a certain distance, the power plate 15 continues to move downward so that the inclined surface at the bottom of the trapezoidal block 21 contacts the arc block 25, thereby pushing the arc block 25 to drive the contact plate 24 to move towards the extrusion hopper 12, so that the guide hole inside the contact plate 24 is aligned with the through hole inside the extrusion hopper 12. When the inclined surface at the bottom of the trapezoidal block 21 separates from the arc block 25, the arc block 25 abuts against the inner plane of the trapezoidal block 21 under the action of the power spring 32. At this time, the power plate 15 continues to move downward until the material inside the through hole and the guide hole is pushed into the inner side of the auxiliary frame 18 for a second extrusion operation.

[0054] The two sets of hydraulic cylinders 14 used in the above extrusion operation operate alternately. When one set of hydraulic cylinders 14 is running, the other set returns to its initial position.

[0055] After the initially extruded material enters the inner side of the auxiliary frame 18 and is located between every two partitions 19, the second drive motor 30 can be started. The output end of the second drive motor 30 drives a reciprocating screw 28 to rotate, thereby driving another reciprocating screw 28 to rotate synchronously through the meshing action of two spur gears 29. This causes a connecting plate 36 to drive a set of power rods 37 to drive an extrusion plate 31 to perform a secondary extrusion operation on the material that has entered the inner side of the partition 19 and undergone the first extrusion molding. Another connecting plate 36 drives another set of power rods 37 to drive an extrusion plate 31 to reset.

[0056] The pressing force generated by the hydraulic cylinder 14 is less than the pressing force generated by the second drive motor 30, which is less than the final pressing force generated by the mold closing.

[0057] Two suspension seats 33 are fixedly connected to the bottom of the auxiliary frame 18. A rotating block 35 is rotatably connected to the inner side of the two suspension seats 33. A rotating plate 20 is fixedly connected to the top of the rotating block 35. The rotating plate 20 is set at the material outlet of the auxiliary frame 18 to block the material. A third drive motor 34 is installed on one side of one of the suspension seats 33. The output end of the third drive motor 34 is fixedly connected to the rotating block 35.

[0058] The drive structure installed inside the support base 3 can be an electric push rod or other power element used to drive the material frame 7 to reciprocate. Since it is existing technology, it is not described in detail in this solution. When the material inside the partition 19 is subjected to secondary extrusion, the extrusion plate 31 is reset. The third drive motor 34 is started. The output end of the third drive motor 34 drives the rotating block 35 to rotate the rotating plate 20, thereby opening the discharge port at the front end of the auxiliary frame 18. This allows the material that has been extruded to fall into the material frame 7 automatically. The material frame 7 is driven to move laterally and reciprocally by the drive structure inside the support base 3, thereby pushing the material after secondary extrusion into the lower die 5 for final extrusion.

[0059] Through a progressive extrusion process of "primary extrusion → secondary extrusion → final die pressing," coupled with an increasing force design (primary extrusion force < secondary extrusion force < final pressing force), the material is gradually transformed from loose to dense.

[0060] One extrusion (pressure column 16) initially compacts the loose material in the through hole to form a basic molded body, preventing the material from breaking due to being too loose during subsequent extrusion;

[0061] Secondary extrusion (extrusion plate 31) further compacts the material within the partition space, reducing internal porosity and increasing density and strength;

[0062] The final mold pressing completes the final shaping with maximum force, ensuring product density and structural stability, and reducing internal defects;

[0063] The automatic closing components (contact plate 24, trapezoidal block 21, etc.) control the timing of material falling through mechanical linkage to ensure that the material after one squeeze falls accurately into the auxiliary frame 18, avoiding leakage or positional deviation.

[0064] After the second extrusion, the opening and closing of the rotating plate 20 and the reciprocating movement of the material frame 7 work together to accurately push the material into the lower die 5, realizing automated transmission from extrusion to final molding, reducing manual intervention, ensuring material position accuracy, and improving pressing consistency.

[0065] Reference Figures 5-6The oscillating material feeding component is located at the end of the extrusion hopper 12 and is used to backfill the material that slides down from the extrusion hopper 12. The oscillating material feeding component includes an oscillating plate 17 rotatably connected to the inside of the hopper 9. A connecting shaft 23 is fixedly connected to both sides of the oscillating plate 17. One end of the connecting shaft 23 passes through the inside of the hopper 9 and is rotatably connected to the hopper 9. A first drive motor 22 is installed on one side of the hopper 9, and the output end of the first drive motor 22 passes through the inside of the hopper 9 and is fixedly connected to one of the connecting shafts 23.

[0066] The inner side of the swing plate 17 is provided with a groove with a diameter larger than that of the trapezoidal block 21, so that the trapezoidal block 21 can move during the swinging process of the swing plate 17. When the material slides along the top of the extrusion hopper 12, the first drive motor 22 drives synchronously. The output end of the first drive motor 22 drives the connecting shaft 23 to drive the swing plate 17 to swing back and forth in a range of ninety degrees, so that the material that has fallen too much can be sprinkled back onto the top of the extrusion hopper 12 for filling.

[0067] When material slides along the top of the extrusion hopper 12, excessive slippage may occur locally due to factors such as vibration and slope, resulting in insufficient filling of the through holes inside the extrusion hopper 12 (such as some through holes lacking material). The swing plate 17, through its 90-degree forward and reverse reciprocating swing, can push this "excessively slipped" material back to the top of the extrusion hopper 12 and replenish it into the through holes, ensuring that each through hole is filled with sufficient material. This avoids problems such as voids and incomplete forming during a single extrusion due to insufficient material, thus ensuring the quality of the basic extrusion.

[0068] The reciprocating oscillation of the oscillating plate can "secondarily sort" the material at the top of the extrusion hopper, preventing material from accumulating in localized areas (such as the edge or bottom of the extrusion hopper). Instead, it guides the dispersed material back to the through-hole areas that need filling, improving the uniformity of material distribution within the extrusion hopper. At the same time, this process can recover excess material that might otherwise have slipped to the bottom of the hopper, reducing raw material waste and improving material utilization.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for preparing low thermal conductivity composite mullite for a lime rotary kiln, characterized in that: include: A frame (1) includes a lower mold (5) installed inside the frame (1), and an upper mold (4) is provided on the inner side of the frame (1) above the lower mold (5). Support frame (2), the support frame (2) is supported on the ground and located on both sides of the frame (1). Two support seats (3) are fixedly connected to the top of the support frame (2). The inner sides of the two support seats (3) are connected to a sliding frame (6) through a drive structure. A support plate (8) is fixedly connected to the top of one of the support frames (2), and a material frame (7) is provided on the top of the support plate (8), and the material frame (7) is fixedly connected to the sliding frame (6). The hopper (9) is located on the top of the material frame (7), and fixed seats (10) are fixedly connected to both sides of the hopper (9), and the fixed seats (10) are installed on the top of the support base (3); The segmented extruder is located inside the hopper (9) and is used to extrude the mixture entering the hopper (9) in segments. The segmented extruder includes an arched slope (11) fixedly connected to the inside of the hopper (9) and two extrusion buckets (12), and the two extrusion buckets (12) are respectively arranged on one side of the arched slope (11). A swinging material feeder, located at the end of the extrusion hopper (12), is used to backfill the material that slides off the extrusion hopper (12); The segmented extruder also includes a fixed plate (13) fixedly connected to the inner side of the hopper (9). A hydraulic cylinder (14) is installed on the top of the fixed plate (13). The output end of the hydraulic cylinder (14) extends through to the bottom of the fixed plate (13) and is fixedly connected to a power plate (15). Multiple sets of pressure columns (16) are fixedly connected to the bottom of the power plate (15). Each set of pressure columns (16) is provided with multiple columns. The extrusion hopper (12) has a through hole extending to the bottom, and the through hole corresponds one-to-one with each pressure column (16). An automatic closing assembly is provided at the bottom of the extrusion hopper (12). A secondary extrusion assembly is provided at the bottom of the extrusion hopper (12). The extrusion bucket (12) is inclined, and the transversely arranged through holes are staggered in pairs. The height of the longitudinally arranged through holes is arranged from high to low, and the length of the longitudinally discharged pressure column (16) is arranged from high to low. The automatic closing assembly includes an abutment plate (24) disposed at the bottom of the extrusion hopper (12), a rectangular block (26) fixedly connected to one end of the extrusion hopper (12), an L-shaped frame (27) slidably connected to the outer wall of the rectangular block (26), a power spring (32) installed between the L-shaped frame (27) and the extrusion hopper (12), one end of the L-shaped frame (27) fixedly connected to the abutment plate (24), an arc-shaped block (25) fixedly connected to the front end of the abutment plate (24), and a trapezoidal block (21) fixedly connected to one side of the power plate (15) above the arc-shaped block (25). The secondary extrusion assembly includes an auxiliary frame (18) fixedly connected to the inner side of the hopper (9), and the auxiliary frame (18) is located at the bottom of the contact plate (24). Multiple partitions (19) are fixedly connected to the inner side of the auxiliary frame (18). The multiple partitions (19) are evenly distributed on the inner side of the auxiliary frame (18), and each set of longitudinally arranged through holes is located between every two partitions (19).

2. The equipment for preparing low thermal conductivity composite mullite for a lime rotary kiln according to claim 1, characterized in that: The secondary extrusion assembly also includes two reciprocating screws (28) rotatably connected between the two auxiliary frames (18). A spur gear (29) is fixedly connected to the outer wall of each of the two reciprocating screws (28). The two spur gears (29) are meshed with each other. A second drive motor (30) is installed inside one of the auxiliary frames (18). The output end of the second drive motor (30) extends through to the outside of the auxiliary frame (18) and is fixedly connected to one of the reciprocating screws (28). An extrusion plate (31) is slidably connected between every two partitions (19). A connecting plate (36) is threadedly connected to the outer wall of the reciprocating screw (28). Multiple power rods (37) are fixedly connected to the inner side of the connecting plate (36). One end of each power rod (37) extends through to the inside of the auxiliary frame (18) and is fixedly connected to one of the extrusion plates (31).

3. The equipment for preparing low thermal conductivity composite mullite for a lime rotary kiln according to claim 2, characterized in that: The inner side of the auxiliary frame (18) is provided with a limiting groove that matches the power rod (37), and the extrusion plate (31) is slidably connected to the auxiliary frame (18) through the power rod (37).

4. The equipment for preparing low thermal conductivity composite mullite for a lime rotary kiln according to claim 2, characterized in that: The bottom of the auxiliary frame (18) is fixedly connected to two suspension seats (33), and a rotating block (35) is rotatably connected to the inner side of the two suspension seats (33). A rotating plate (20) is fixedly connected to the top of the rotating block (35), and the rotating plate (20) is set at the feed port of the auxiliary frame (18) to block it. A third drive motor (34) is installed on one side of one of the suspension seats (33), and the output end of the third drive motor (34) is fixedly connected to the rotating block (35).

5. The equipment for preparing low thermal conductivity composite mullite for a lime rotary kiln according to claim 1, characterized in that: The oscillating feeding component includes an oscillating plate (17) rotatably connected to the inner side of the hopper (9). A connecting shaft (23) is fixedly connected to both sides of the oscillating plate (17). One end of the connecting shaft (23) passes through the inner side of the hopper (9) and is rotatably connected to the hopper (9). A first drive motor (22) is installed on one side of the hopper (9), and the output end of the first drive motor (22) passes through the inner side of the hopper (9) and is fixedly connected to one of the connecting shafts (23).

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