High-temperature ceramic aggregate mixing and calcining device

Abstract

This application discloses a high-temperature ceramsite aggregate mixing and calcining device, comprising a calcining box with an opening at the top for high-temperature ceramsite and phosphogypsum to enter, the opening having an opening and closing gate; an outlet at the bottom of the calcining box with an outlet opening and closing gate; a filter element located at the outlet and near the outlet opening and closing gate, allowing phosphogypsum to pass through; and a vibration device located on the side wall of the calcining box for vibrating the calcining box. By incorporating the vibration device and filter element, this application enables phosphogypsum to fully fill the gaps between the ceramsite and achieve efficient mixing and calcination, significantly improving heat utilization and calcination effect. Furthermore, the vibration device can effectively separate phosphogypsum and ceramsite.

Description

Technical Field

[0001] This application relates to the field of phosphogypsum dehydration treatment technology, and in particular to a high-temperature ceramsite aggregate mixing and calcination device. Background Technology

[0002] Expanded clay aggregate (ECA) is typically lightweight, porous, and heat-resistant. It is widely used in construction and soil improvement, serving as a filter material, filler, insulation material, and a basic raw material for various composite building materials. In the industrial production of ECA, the aggregate is first fired at high temperatures in a furnace to form a robust, porous, and stable granular structure. The high-temperature ECA is then cooled to room temperature, facilitating subsequent storage, transportation, and use.

[0003] In related technologies, there are already schemes for calcining and modifying phosphogypsum using the waste heat of high-temperature ceramsite. For example, patent application number CN202310470395.0 describes a device for calcining and harmlessly treating phosphogypsum using high-temperature ceramsite, and patent application number CN202011625305.3 describes a device and its method for calcining and regenerating phosphogypsum using high-temperature ceramsite. Both schemes utilize a rotary kiln to recover the waste heat of the high-temperature ceramsite.

[0004] However, in order to maximize the use of the waste heat of the ceramsite, the rotary kiln for mixing and calcining is usually set up 15 meters underground, and its size is usually 45 meters long and 15 meters wide. The civil engineering cost is huge and there are also safety hazards during the construction process. Utility Model Content

[0005] In order to simplify the structure while ensuring the efficiency of waste heat recovery of ceramsite, this application provides a high-temperature ceramsite aggregate mixing and calcining device.

[0006] The high-temperature ceramsite aggregate mixing and calcining device provided in this application adopts the following technical solution: A high-temperature ceramsite aggregate mixing and calcining device includes: The calcining box has an opening at the top for high-temperature ceramsite and phosphogypsum to enter, and an opening gate is provided at the opening. The bottom of the calcining box has an outlet, and an outlet gate is provided at the outlet. A filter element is provided at the outlet and located at the outlet opening and closing gate, the filter element allowing phosphogypsum to pass through; A vibration device is installed on the side wall of the calcining box to vibrate the calcining box.

[0007] By adopting the above technical solution, this high-temperature ceramsite aggregate mixing and calcining device can effectively utilize the waste heat of the high-temperature ceramsite to efficiently calcine phosphogypsum. Specifically, the calcination chamber is rationally designed, facilitating both the addition of high-temperature ceramsite and phosphogypsum and the discharge operation. The vibration device design ensures thorough mixing of the high-temperature ceramsite and phosphogypsum within the calcination chamber, guaranteeing uniform distribution of phosphogypsum among the ceramsite, thereby improving calcination efficiency and quality. Furthermore, the filter element effectively separates the calcined phosphogypsum from the uncooled high-temperature ceramsite, preventing them from mixing and affecting subsequent processing. The overall structure is simple and compact, easy to maintain and operate, significantly reducing the civil engineering costs and operational risks of the equipment, and improving production continuity and safety.

[0008] Optionally, it also includes a moving device, a high-temperature ceramsite feeding device, and a phosphogypsum feeding device. The moving device can drive the calcination box to move below the discharge port of the high-temperature ceramsite feeding device and below the discharge port of the phosphogypsum feeding device.

[0009] By adopting the above technical solution, the mobile device can precisely move the calcination box to below the discharge ports of the high-temperature ceramsite feeding device and the phosphogypsum feeding device, ensuring accurate feeding of high-temperature ceramsite and phosphogypsum, improving production efficiency and mixing uniformity. At the same time, this design avoids the risks of manual handling, reduces labor requirements, and lowers production costs.

[0010] Optionally, each of the moving devices supports one calcination box, and there are multiple moving devices arranged in sequence, with the discharge port of the phosphogypsum feeding device able to move above the calcination box.

[0011] By adopting the above technical solution, a layer of phosphogypsum material (for heat insulation) is first laid at the bottom of the calcining box. Then, high-temperature ceramsite (>800℃) freshly sintered at high temperatures is fed into the calcining box from the calcining kiln. The high-temperature ceramsite occupies most of the space in the calcining box. Phosphogypsum material is then added, and the vibration device is turned on for mixing and calcination. After calcination, the outlet gate of the calcining box is opened, and the vibration device is turned on simultaneously. Using vibration separation, the calcined phosphogypsum passes through the filter and falls into the collection device, while the ceramsite remains in the calcining box. At this time, the ceramsite still has residual heat. The outlet of the phosphogypsum feeding device is moved to the top of the calcining box to reload phosphogypsum powder, and the process of vibration mixing and calcination is repeated until the ceramsite cools down. This solution can further improve the calcination quality and yield of phosphogypsum while ensuring the accuracy and stability of the calcination process.

[0012] Optionally, the mobile device includes a moving track and multiple moving trolleys, the multiple moving trolleys being able to move on the moving track, and the calcining box being mounted on the moving trolleys.

[0013] By adopting the above technical solution, the combined design of the moving track and multiple moving trolleys not only ensures the continuity and stability of the calcination process but also reduces the need for manual intervention and lowers labor intensity. Furthermore, this design helps optimize the production line layout, reduces the floor space required, and further enhances the economy and practicality of the entire system.

[0014] Optionally, the moving track is a circular track or a converted closed track.

[0015] By adopting the above technical solutions, the moving track is designed as a circular track or a convertible closed track, ensuring the continuous cyclical operation of multiple moving trolleys on the track. This design not only improves the equipment's working efficiency but also reduces downtime caused by frequent changes in working position, thereby increasing overall production capacity. Furthermore, the circular track or convertible closed track design makes the entire system more compact, occupies less space, and helps save factory space.

[0016] Optionally, the opening and closing gates and the outlet opening and closing gates are slide gates or double-hinged gates.

[0017] By adopting the above technical solutions, the slide gate or double-hinged gate can effectively control the opening and closing of the calcination chamber's opening and outlet, ensuring the sealing and safety of high-temperature ceramsite and phosphogypsum during the mixing and calcination process. At the same time, these types of gates are simple in design, easy to operate, and have low maintenance costs, contributing to improved overall equipment efficiency and reliability.

[0018] Optionally, both the opening and closing gates and the outlet opening and closing gates are made of heat-insulating material.

[0019] By adopting the above technical solution, the opening and closing gates and outlet opening and closing gates made of heat-insulating materials can effectively reduce the heat loss of high-temperature ceramsite, ensure temperature stability during calcination, and improve the calcination effect of phosphogypsum. At the same time, the heat-insulating materials can also protect the safety of operators and avoid operational risks caused by high temperatures.

[0020] Optionally, the filter element is detachably connected to the calcination chamber.

[0021] By adopting the above technical solution, the filter elements can be easily replaced or cleaned after use. This not only improves the ease of equipment maintenance and service life but also ensures stability and efficiency during long-term operation. Specifically, when the filter becomes clogged or damaged due to long-term use, operators can quickly remove it for cleaning or replacement, thus avoiding any impact on the overall performance of the unit. Furthermore, this design helps reduce maintenance costs and improve production continuity.

[0022] Optionally, the filter element includes a filter frame and a filter screen installed inside the filter frame. The inner wall of the calcination chamber is provided with a snap-fit ​​mechanism, and the filter frame is detachably connected to the calcination chamber through the snap-fit ​​mechanism.

[0023] By adopting the above technical solution, the detachable connection design between the filter frame and the calcination box not only facilitates equipment maintenance and cleaning but also improves the operational flexibility of the entire unit. When the filter screen needs to be replaced or cleaned, simply removing the filter frame is sufficient, greatly reducing downtime and improving production efficiency. Furthermore, this design helps maintain the cleanliness of the filter screen, ensuring optimal results in each calcination process, thereby improving the calcination quality and yield of phosphogypsum.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a vibration device and a filter, phosphogypsum can fully fill the gaps between the ceramsite and be efficiently mixed and calcined, which significantly improves the heat utilization rate and calcination effect. Furthermore, the vibration device can also effectively separate phosphogypsum and ceramsite. 2. The design of the mobile device enables continuous production, avoiding the inefficiency of the traditional fixed container method and significantly improving production efficiency; 3. The opening and closing gate of the calcination chamber is made of heat-insulating material, which effectively prevents high temperature damage to the equipment and extends the service life of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0026] Figure 2 This is a cross-sectional view of the calcination chamber in an embodiment of this application.

[0027] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0028] Explanation of reference numerals in the attached figures: 1. Calcination box; 11. Opening; 12. Opening gate; 13. Outlet; 14. Outlet gate; 2. Filter element; 21. Filter frame; 22. Filter screen; 3. Vibration device; 4. Buckling mechanism; 41. Buckle block; 42. Pull rod; 43. Telescopic spring; 5. Moving device; 51. Moving track; 52. Moving trolley; 6. High-temperature ceramsite feeding device; 61. Conveyor belt; 7. Phosphogypsum feeding device; 71. Pneumatic feeder. Detailed Implementation

[0029] The following will be combined with the appendix Figure 1-3The technical solutions in the embodiments of this utility model are clearly and completely described herein. The described embodiments are only possible technical implementations of this utility model and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of this utility model without creative effort, and these embodiments are also within the protection scope of this utility model.

[0030] The inventors of this application have discovered that existing devices for the calcination and harmless treatment of phosphogypsum using high-temperature ceramsite have problems such as high civil engineering costs and safety hazards during construction. Therefore, this application mainly adopts the following high-temperature ceramsite aggregate mixing and calcination device, which achieves the effects of simplifying equipment structure, reducing construction costs and improving production efficiency. The following is a further detailed description of this application.

[0031] This application provides a high-temperature ceramsite aggregate mixing and calcination device, referring to... Figure 1 and Figure 2 The calcination apparatus includes a calcination chamber 1, a filter element 2, and a vibration device 3. The calcination chamber 1 has an opening 11 at the top for the high-temperature ceramsite and phosphogypsum to enter, and an opening / closing gate 12 is installed at the opening 11. The bottom of the calcination chamber 1 has an outlet 13, and an outlet / closing gate 14 is installed at the outlet 13. The filter element 2 is located at the outlet 13 and is positioned within the outlet / closing gate 14, allowing phosphogypsum to pass through. The vibration device 3 is located on the side wall of the calcination chamber 1 to vibrate the calcination chamber 1.

[0032] Specifically, the calcining chamber 1 includes a metal outer shell and an internal lining. The metal outer shell is made of high-strength stainless steel to ensure sufficient strength and corrosion resistance. The internal lining can be made of refractory bricks, which can effectively resist thermal shock under high-temperature environments. This design ensures both the durability of the equipment and improves energy efficiency. Furthermore, both the opening gate 12 and the outlet gate 14 can be either slide gates or double-hinged gates, both made of insulating materials such as aluminum silicate fiberboard to reduce heat loss.

[0033] The filter element 2 includes a filter frame 21 and a filter screen 22 installed inside the filter frame 21. The filter frame 21 is made of aluminum alloy, which is lightweight and high-strength, and easy to disassemble and clean. The mesh size of the filter screen 22 can be adjusted according to production needs, generally using an 80-120 mesh screen to ensure that the phosphogypsum powder can pass through smoothly without clogging. The filter frame 21 is detachably connected to the calcination chamber 1 via a snap-fit ​​mechanism 4, facilitating periodic replacement or cleaning.

[0034] Reference Figure 2 and Figure 3Optionally, the latching mechanism 4 includes a latching block 41, a pull rod 42, and a telescopic spring 43. The latching block 41 is slidably connected to the inner wall of the calcining chamber 1. One end of the pull rod 42 is connected to the latching block 41, and the other end extends out of the calcining chamber 1 for easy operation of the latching block 41. The telescopic spring 43 is disposed between the latching block 41 and the inner wall of the calcining chamber 1 to allow the latching block 41 to pop out from the side wall of the calcining chamber 1. The top of the latching block 41 abuts against the bottom of the filter frame 21. The calcining chamber 1 is provided with multiple sets of latching mechanisms 4 to achieve a detachable connection between the filter frame 21 and the calcining chamber 1. In other embodiments, the latching mechanism 4 may also have other structural forms.

[0035] Reference Figure 1 Vibration devices 3 are installed on both sides of the calcination chamber 1, including vibration motors. The vibration motors are designed for low noise and high power, with a frequency range of 20-50Hz and an amplitude of 2-5mm, which can be adjusted according to actual needs. The purpose of this design is to improve the mixing effect and ensure that the phosphogypsum powder is evenly distributed among the high-temperature ceramsite, thereby improving the calcination quality and efficiency.

[0036] Reference Figure 1 In another preferred embodiment, the calcination apparatus further includes a moving device 5, a high-temperature ceramsite feeding device 6, and a phosphogypsum feeding device 7. Specifically, the moving device 5 can move the calcination box 1 to below the discharge port of the high-temperature ceramsite feeding device 6 and below the discharge port of the phosphogypsum feeding device 7.

[0037] Specifically, the mobile device 5 includes a moving track 51 and multiple mobile trolleys 52. The moving track 51 is a circular track or a convertible closed track, made of high-strength steel with a rust-proof surface to ensure it does not deform over long-term use. The moving track 51 has a central space for movement, allowing the outlet gate 14 to move freely within this space. Multiple mobile trolleys 52 are arranged sequentially, receiving high-temperature ceramsite from the high-temperature ceramsite feeding device 6. Each mobile trolley 52 can move freely on the moving track 51, supporting one calcination box 1. The mobile trolleys 52 are electrically driven and equipped with an intelligent positioning system, allowing for precise position control and ensuring accurate stopping at the designated location each time.

[0038] The high-temperature ceramsite feeding device 6 mainly includes a calcining kiln (not shown in the figure) and a conveyor belt 61. The conveyor belt 61 is used to transport the high-temperature ceramsite from the calcining kiln to the calcining box 1. The conveyor belt 61 can adopt a chain design with adjustable speed and a maximum conveying capacity of 10 tons / hour. The advantage of this design is that it can achieve continuous feeding and improve production efficiency.

[0039] The phosphogypsum feeding device 7 mainly includes a storage tank (not shown in the figure) and a pneumatic feeder 71. The storage tank stores phosphogypsum, and the pneumatic feeder 71 is connected to the discharge end of the storage tank. The pneumatic feeder 71 can move along the moving track 51 so that the discharge port of the pneumatic feeder 71 is located directly above the calcining box 1, so as to transport phosphogypsum powder into the calcining box 1, thereby accurately controlling the amount and time of phosphogypsum powder feeding.

[0040] The implementation principle of this embodiment is as follows: First, a layer of phosphogypsum material (for heat insulation) is laid at the bottom of the calcining box 1. Then, high-temperature ceramsite (>800℃) obtained by high-temperature sintering is fed into the calcining box 1 from the calcining kiln. The high-temperature ceramsite occupies most of the space in the calcining box 1. Then, phosphogypsum material is added, and the vibration device 3 is turned on for mixing and calcination. After calcination, the outlet gate 14 of the calcining box 1 is opened, and the vibration device 3 is turned on at the same time. Using vibration separation, the calcined phosphogypsum will pass through the filter element 2 and fall into the collection device, while the ceramsite remains in the calcining box 1. At this time, the ceramsite still has residual heat. The pneumatic feeder 71 moves to the top of the calcining box 1, reloads the phosphogypsum powder, and vibrates and mixes for calcination again. The process is repeated until the ceramsite cools down. This scheme can further improve the calcination quality and yield of phosphogypsum while ensuring the accuracy and stability of the calcination process.

[0041] This embodiment achieves efficient mixing and calcination of high-temperature ceramsite and phosphogypsum by rationally designing the calcination box 1, filter element 2, and vibration device 3. The entire process does not require a complex mixing and calcination kiln, which greatly reduces civil engineering investment and safety risks, and improves economic benefits.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-temperature ceramsite aggregate mixing and calcining device, characterized in that, include: A calcining box (1) is provided with an opening (11) at the top for high-temperature ceramsite and phosphogypsum to enter. An opening gate (12) is provided at the opening (11). An outlet (13) is provided at the bottom of the calcining box (1). An outlet gate (14) is provided at the outlet (13). A filter element (2) is provided at the outlet (13) and located at the outlet opening and closing gate (14), the filter element (2) allowing phosphogypsum to pass through; A vibration device (3) is installed on the side wall of the calcining box (1) to vibrate the calcining box (1).

2. The high-temperature ceramsite aggregate mixing and calcining device according to claim 1, characterized in that: It also includes a moving device (5), a high-temperature ceramsite feeding device (6), and a phosphogypsum feeding device (7). The moving device (5) can drive the calcining box (1) to move below the outlet of the high-temperature ceramsite feeding device (6) and below the outlet of the phosphogypsum feeding device (7).

3. The high-temperature ceramsite aggregate mixing and calcining device according to claim 2, characterized in that: Each of the moving devices (5) supports a calcining box (1). There are multiple moving devices (5) arranged in sequence. The outlet of the phosphogypsum feeding device (7) can be moved to the top of the calcining box (1).

4. A high-temperature ceramsite aggregate mixing and calcining device according to claim 2 or 3, characterized in that: The mobile device (5) includes a mobile track (51) and multiple mobile trolleys (52), the multiple mobile trolleys (52) being able to move on the mobile track (51), and the calcining box (1) being mounted on the mobile trolleys (52).

5. The high-temperature ceramsite aggregate mixing and calcining device according to claim 4, characterized in that: The moving track (51) is a circular track or a converted closed track.

6. The high-temperature ceramsite aggregate mixing and calcining device according to claim 1, characterized in that: The opening gate (12) and the outlet gate (14) are either slide gates or double-hinged gates.

7. The high-temperature ceramsite aggregate mixing and calcining device according to claim 1, characterized in that: Both the opening gate (12) and the outlet gate (14) are made of heat-insulating material.

8. The high-temperature ceramsite aggregate mixing and calcining device according to claim 1, characterized in that: The filter element (2) is detachably connected to the calcining box (1).

9. The high-temperature ceramsite aggregate mixing and calcining device according to claim 8, characterized in that: The filter element (2) includes a filter frame (21) and a filter screen (22) installed in the filter frame (21). The inner wall of the calcining box (1) is provided with a buckling mechanism (4). The filter frame (21) is detachably connected to the calcining box (1) through the buckling mechanism (4).

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