Low-melting-loss efficient combustion rotary kiln device

Abstract

The invention discloses a low-melting-loss efficient combustion rotary kiln device, and belongs to the technical field of waste aluminum recycling equipment. A low-melting-loss efficient combustion rotary kiln device comprises a foundation base; the rotary kiln equipment is arranged on the foundation base, and the rotary kiln equipment comprises a rotary kiln barrel; the preliminary crushing mechanism comprises a treatment shell, and a preliminary crushing assembly is mounted in the treatment shell; the feeding mechanism is connected to the feeding opening of the processing shell; and the screening mechanism comprises a mounting shell, and a screening assembly is mounted in the mounting shell. According to the technical scheme, the preliminary smashing assembly and the screening mechanism are arranged, materials can be preliminarily smashed and screened before high-temperature smelting of the materials, it is ensured that the sizes of particles of the materials entering the rotary kiln cylinder are relatively consistent, the heating conditions of the materials are greatly improved, the melting loss rate is effectively reduced, and the production efficiency is improved. And meanwhile, the problems of extra transfer and site occupation caused by traditional independent pretreatment are also avoided.

Description

Technical Field

[0001] This application relates to the technical field of equipment for waste aluminum recycling, and more specifically, to a low-loss, high-efficiency combustion rotary kiln device. Background Technology

[0002] Aluminum, as an important basic metal material, has extremely high economic value and environmental benefits when recycled. Compared with smelting primary aluminum from bauxite, the production of recycled aluminum can save approximately 95% of energy and significantly reduce greenhouse gas emissions. Therefore, achieving efficient and low-carbon recycling of waste aluminum has become a key link in the resource recycling industry. Among various processing technologies, rotary kilns, due to their excellent material mixing and heat exchange characteristics, have been widely used in the smelting and recycling of waste aluminum, aluminum-containing slag, and other recycled aluminum materials.

[0003] The prior art publication CN113237324A provides a rotary kiln device. When it is necessary to transport materials into the kiln body, the materials can first be transported to the push pipe through the feeding hopper. The first motor starts and drives the first rotating shaft and drive gear to rotate, which in turn drives the rotating gear to rotate, which drives the kiln body to rotate, making it easier to drive the material inside the kiln to rotate. The rotation of the first rotating shaft drives the first rotating shaft to rotate, which in turn drives the second rotating shaft to rotate, making it easier to drive the conveying plate to rotate, which facilitates the conveying of materials and prevents materials and flue gas from overflowing from the feeding hopper, thus preventing the phenomenon of frequent material discharge.

[0004] While the aforementioned existing technologies improve feeding efficiency and reduce downtime due to feeding failures to some extent, they still have the following drawbacks: In actual production, scrap aluminum and aluminum-containing slag are generally from complex sources and come in various forms. The aforementioned technologies and most commercially available rotary kilns of this type struggle to pre-treat the scrap aluminum or aluminum slag. If these unhomogenized materials are directly fed into the rotary kiln, the mixing of large pieces with small fragments leads to severe uneven heating. Smaller materials will melt and oxidize prematurely, resulting in burn-off, while larger materials may form "cold nuclei" due to insufficient heat. This phenomenon not only leads to low kiln reaction efficiency and drastic fluctuations in aluminum melt yield, resulting in significant melting losses, but also increases energy consumption due to prolonged heating time and incomplete reaction. While pre-homogenizing the scrap aluminum or aluminum slag before transfer and feeding can improve furnace conditions to some extent, it also increases additional equipment investment, plant space, and material transfer processes, significantly extending the overall processing time and hindering the improvement of recycling efficiency.

[0005] In view of this, we propose a low-loss, high-efficiency combustion rotary kiln device. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] The purpose of this application is to provide a low-melting-loss, high-efficiency combustion rotary kiln device, which solves the technical problem that existing technologies cannot directly pre-treat waste aluminum or aluminum slag. It can perform preliminary crushing and screening of materials, ensuring that the particle size of materials entering the rotary kiln is relatively consistent, greatly improving the heating conditions of materials, and avoiding the additional transportation and site occupation problems caused by traditional independent pre-treatment.

[0008] 2. Technical Solution

[0009] This application provides a low-loss, high-efficiency combustion rotary kiln device, comprising:

[0010] Basic base;

[0011] A rotary kiln device is installed on a foundation base. The rotary kiln device includes a kiln tail, a kiln head, and a rotary kiln cylinder connected between the two. A feed pipe is connected to the kiln tail, and a discharge pipe is connected to the kiln head.

[0012] A preliminary crushing mechanism includes a processing shell, in which a preliminary crushing component is installed. The waste aluminum or aluminum slag material fed into the preliminary crushing component undergoes a preliminary crushing operation to reduce its overall size span.

[0013] A feeding mechanism is connected to the feed inlet of the processing housing and is used to transport the external material to be processed to the primary crushing component station. A conveying pipe is fixedly connected to the lower side of the processing housing.

[0014] A screening mechanism includes a mounting housing, a screening assembly is installed inside the mounting housing, the screening assembly includes at least one screening element, a conveying pipe is connected to the feed end of the screening element, and the other end of the feed pipe is connected to the discharge port at the lower end of the mounting housing.

[0015] As an optional solution to the technical solution of this application, a clearing mechanism is also installed on one side of the conveying pipe. The clearing mechanism includes a push rod and at least one electric push rod. The push rod passes through the conveying pipe, and the telescopic end of the electric push rod is connected and fixed to the push rod to drive the push rod to move along its axial direction in order to clear the material in the conveying pipe and prevent the material from blocking the conveying pipe.

[0016] As an optional solution to the technical solution of this application, the feeding mechanism includes:

[0017] A feeding hopper is inserted into and fixed to one side of the processing housing. The lower outlet of the feeding hopper extends to the feeding station of the primary crushing component to guide the material to the crushing area.

[0018] The conveyor belt is inclined and positioned on one side of the feed hopper, with the discharge end of the conveyor belt connected to the upper feed inlet of the feed hopper.

[0019] As an optional solution to the technical solution of this application, the screening component includes a rotary screening section, which is installed in an inclined structure within the mounting housing. The rotary screening section includes:

[0020] A screening cylinder, wherein the screening cylinder is a cylindrical structure and its cylinder wall is densely covered with sieve holes in the circumferential direction;

[0021] The screen cylinder has two fixed cylinders arranged symmetrically at both ends. The fixed cylinders are fixedly installed on the mounting housing. The screen cylinder is rotatably arranged between the two fixed cylinders. The lower end of the conveying pipe is connected to the upper fixed cylinder. The lower end of the lower fixed cylinder is fixedly connected to a waste pipe, and a discharge valve is installed on the waste pipe.

[0022] A rotating mechanism is used to drive the screening cylinder to rotate.

[0023] As an optional solution to the technical solution of this application, a pushing mechanism is further installed in the rotary screening section, the pushing mechanism comprising:

[0024] A second electric motor is mounted on the outside of one of the fixed cylinders;

[0025] A rotating rod is rotatably disposed within the rotary screening section, and one end of the rotating rod is fixedly connected to the output end of the second motor.

[0026] An auger conveyor is fixedly mounted on a rotating rod.

[0027] As an optional solution to the technical solution of this application, the rotating mechanism includes:

[0028] A transmission rod is rotatably mounted on the outside of one of the fixed cylinders, and pulleys are sleeved and fixed on one side of the transmission rod and the other side of the rotating rod.

[0029] A transmission belt, wherein the transmission belt and the pulley engage in frictional transmission;

[0030] The second gear is fixedly connected to the other side of the transmission rod;

[0031] A toothed ring is disposed on one side of the screening cylinder and is meshed with a second gear.

[0032] As an optional solution to the technical solution in this application, the auger conveyor includes two first auger blades, which are fixedly mounted on the rotating rod at a certain distance apart. A crushing component is correspondingly provided in the gap area between the two first auger blades, and the crushing component includes:

[0033] A grinding ring is embedded and fixed on a screening cylinder, and its inner ring surface forms a grinding working surface.

[0034] Multiple connecting rods are fixedly installed on the rotating rod between the two first auger blades. The connecting rods are evenly distributed circumferentially and staggered axially. Each connecting rod is made of an elastic telescopic rod, which includes:

[0035] A receiving sleeve is fixedly installed on the rotating rod;

[0036] A sliding rod is slidably mounted on the outside of the receiving sleeve, and the crushing roller is mounted on the outer end of the sliding rod.

[0037] An elastic element is fixedly connected between the sliding rod and the receiving sleeve;

[0038] Multiple crushing rollers are fixedly mounted on the outer end of a connecting rod, and the crushing rollers include:

[0039] A fixed roller is fixedly installed on the outer end of the sliding rod;

[0040] At least one rotating roller, which is constrained by and rotatably connected to the end of a fixed roller.

[0041] As an optional solution to the technical solution of this application, a flexible scraper is fixedly installed on the outer edge of the first auger blade. The flexible scraper is made of rubber or a flexible wear-resistant material with similar properties. The length direction of the flexible scraper is adapted to the spiral edge of the first auger blade. The flexible scraper maintains sliding contact with the inner wall of the screening cylinder. Buffer members are installed at both ends of the screening cylinder. The buffer members include:

[0042] A driving ring, which is rotatably limited and installed inside the fixed cylinder;

[0043] An elastic connecting ring is fixedly installed between the driving ring and the screening cylinder, and the elastic connecting ring is made of rubber or polyurethane elastic material.

[0044] As an optional solution to the technical solution of this application, an exhaust pipe is also fixedly connected to the mounting housing, and a waste heat utilization component is also installed on one side of the base. The waste heat utilization component includes:

[0045] A flue gas pipe is provided on one side of the kiln head to collect the flue gas generated after combustion in the furnace.

[0046] An exhaust gas burner is mounted on a base, and the exhaust gas pipe outlet is connected to the exhaust gas burner inlet.

[0047] An exhaust fan, wherein the air inlet of the exhaust fan is connected to the air outlet of the exhaust gas burner;

[0048] An air supply pipe is fixedly connected to the air outlet end of the induced draft equipment;

[0049] An air distribution pipe is fixedly connected to the other end of an air supply pipe;

[0050] Multiple nozzles are fixedly connected to the air distribution pipe at certain intervals, and a one-way valve is installed on the air outlet side of each nozzle.

[0051] As an optional solution to the technical solution in this application, a feeding and tilting assembly is further installed inside the rotary kiln cylinder, the feeding and tilting assembly comprising:

[0052] A third electric motor is installed on the outside of the rotary kiln shell;

[0053] A rotating rod is rotatably mounted inside the rotary kiln cylinder, and the end of the rotating rod is connected to the output end of a third motor.

[0054] Multiple stirring rods are fixedly mounted on a rotating rod;

[0055] Several material-turning plates are installed on the radially outer side of the rotating rod, and the material-turning plates are connected and fixed to the outer end of the stirring rod;

[0056] The feeding and tilting assembly also includes:

[0057] A rotating shaft is rotatably disposed inside the feed pipe;

[0058] The second auger blade is sleeved and fixed on the rotating shaft;

[0059] A driving mechanism, used to drive the rotating shaft to rotate, includes:

[0060] Two bevel gears are respectively sleeved and fixed on one side of the rotating shaft and the rotating rod, and the two bevel gears mesh perpendicularly.

[0061] A protective box is provided, which covers the outside of the two bevel gears and is fixedly connected to the feed pipe.

[0062] 3. Beneficial effects

[0063] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0064] I. The technical solution of this application, by setting up a preliminary crushing component and a screening mechanism, can perform preliminary crushing and screening of materials before high-temperature melting, ensuring that the particle size of the materials entering the rotary kiln is relatively consistent, greatly improving the heating conditions of the materials, reducing metal oxidation and burning caused by insufficient internal heating of large pieces of materials or overheating of small pieces of materials, effectively reducing the melting loss rate, and also avoiding the additional transportation and site occupation problems caused by traditional independent pretreatment.

[0065] II. The technical solution of this application, by setting a rotating mechanism, can drive the screening cylinder to rotate during material screening, so that the material inside the screening cylinder will continuously tumble, effectively improving screening efficiency; at the same time, by setting a pushing mechanism, the material inside the screening cylinder can be actively pushed to the lower end, avoiding material accumulation inside the screening cylinder, and effectively ensuring the smooth progress of material screening.

[0066] Third, the technical solution of this application can perform secondary crushing of materials by setting up a grinding ring and crushing roller, thereby improving the yield of qualified fine materials; at the same time, by setting up an elastic telescopic rod, the crushing roller can periodically strike the material and the working surface of the grinding ring. On the one hand, it can significantly improve the crushing effect of the material, and on the other hand, the periodic impact force will cause the screening cylinder to generate high-frequency micro-amplitude vibration, effectively shaking off the material particles stuck in the screen holes, preventing screen hole blockage, and thus maintaining stable screening efficiency.

[0067] Fourth, the technical solution of this application sets up a waste heat utilization component, and the purified high-temperature exhaust gas is blown towards the screening cylinder, which can not only preheat the material and improve the thermal efficiency of the entire system; but also help prevent the material from adhering to or clogging the screen holes after the airflow is blown towards the screen holes, further ensuring the smooth progress of screening.

[0068] V. The technical solution of this application, by setting up a stirring rod and a turning plate, can actively stir and turn the material inside the rotary kiln when the material is subjected to high temperature treatment, thereby further improving the heat exchange efficiency and chemical reaction rate of the material inside the rotary kiln. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of the overall structure of a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0070] Figure 2 This is a cross-sectional view of the structure of the housing in the low melting loss and high efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0071] Figure 3This is a schematic diagram of the structure of the screening component in the low melting loss and high efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0072] Figure 4 This is a schematic diagram of the feeding mechanism in a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0073] Figure 5 This is a schematic diagram of the crushing component in a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0074] Figure 6 This is a schematic diagram of the elastic telescopic rod and crushing roller in a low melting loss and high efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application.

[0075] Figure 7 This is a structural breakdown diagram of the crushing roller in a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0076] Figure 8 This is a partial structural diagram of one side of the gas distribution pipe in a low melting loss, high efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application.

[0077] Figure 9 This is a cross-sectional view of the processing shell in a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0078] Figure 10 This is a schematic diagram of the rotating mechanism in a low-melting-loss, high-efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0079] Figure 11 This is a schematic diagram of the feeding and turning component structure in a low melting loss and high efficiency combustion rotary kiln device disclosed in a preferred embodiment of this application;

[0080] The following are the labeling instructions in the diagram: 1. Foundation base; 2. Kiln tail; 3. Kiln head; 4. Discharge pipe; 5. Feeding and turning assembly; 501. Third motor; 502. Rotating rod; 503. Stirring rod; 504. Protective box; 505. Turning plate; 506. Second auger blade; 507. Rotating shaft; 508. Bevel gear; 6. Screening assembly; 601. Fixed cylinder; 602. Screening cylinder; 603. Gear ring; 604. Discharge valve; 605. Drive ring; 606. Elastic connecting ring; 607. Second gear; 608. Rotating rod; 609. Pulley; 610. Transmission belt; 611. Second motor; 612. First auger blade; 613. Flexible scraper; 614. Transmission rod; 615. Screen hole; 616. Waste pipe; 7. Crushing assembly; 701. Grinding ring; 702. Fixed roller; 703. Rotating roller; 704. Receiving sleeve; 705. Elastic element; 706. Sliding rod; 8. Preliminary crushing assembly; 801. Crushing roller; 802. First gear; 803. First motor; 9. Waste heat utilization assembly; 901. Flue gas pipe; 902. Tail gas burner; 903. Gas distribution pipe; 904. One-way valve; 905. Gas supply pipe; 906. Nozzle; 907. Exhaust fan; 10. Processing shell; 11. Conveyor belt; 12. Waste gas pipe; 13. Electric push rod; 14. Feed hopper; 15. Conveying pipe; 16. Feed pipe; 17. Rotary kiln shell; 18. Mounting shell; 19. Push rod. Detailed Implementation

[0081] The present application will be further described in detail below with reference to the accompanying drawings.

[0082] Reference Figures 1-11 This application provides a low-melting-loss, high-efficiency combustion rotary kiln device, which includes a base 1, a rotary kiln device, a preliminary crushing mechanism, a feeding mechanism, and a screening mechanism.

[0083] The rotary kiln equipment is mounted on the foundation base 1 and includes a kiln tail 2, a kiln head 3, and a rotary kiln cylinder 17 connected between the two. The rotary kiln cylinder 17 forms a high-temperature rotary kiln feeding system, which can handle the drying, paint removal, and feeding of waste materials such as aluminum shavings and crushed materials. The rotary kiln cylinder 17 utilizes its internal high temperature to dry, remove paint, and degrease materials from various sources. Volatile substances such as paint, coatings, and oil adhering to the materials are carbonized and gasified at high temperatures inside the kiln. The resulting flue gas can be drawn out through the flue of the kiln tail 2 and then led to the flue gas incineration system for incineration by a high-temperature circulating fan. The rotary kiln cylinder 17 can be designed with an inner diameter of 1500mm, an outer diameter of 1926mm, and a cylinder length of 15500mm. The kiln body is made of 16mm thick steel plate, and the inner lining is constructed using FHC-80 high-temperature sintered precast components and refractory fiber blankets to ensure insulation. The rotary kiln shell 17 is installed at an incline, with an inclination angle of, for example, 2.85 degrees. Axial movement of the material is achieved through its inclination angle and rotation. The drive system can employ a 30kW cycloidal pinwheel reducer, transmitted via a chain coupling. The rotational speed of the rotary kiln shell 17 can be adjusted within the range of 1-5.3 r / min via a frequency converter. The rotary kiln shell 17 adopts a double-roller support structure, with an outer diameter of, for example, 2350mm. A roller support mechanism is designed at the roller ring to improve the stability of the rotary kiln shell 17 during operation. The base and columns can be welded from 45# I-beams, and their strength meets the requirements for stable operation of the rotary kiln. A roller drive is used between the drum and the rollers to prevent deformation, jamming, and damage to the transmission device caused by thermal expansion. A feed pipe 16 is connected to the kiln tail 2 to receive pre-treated materials, and a discharge pipe 4 is connected to the kiln head 3 to discharge smelting products. The lining of the kiln head 3 area can be a replaceable structure and uses high-strength wear-resistant refractory material to cope with the scouring of high-temperature materials. The primary crushing mechanism includes a processing shell 10, in which a primary crushing component 8 is installed. The waste aluminum or aluminum slag material fed into the primary crushing component 8 is subjected to a primary crushing operation to reduce its overall size span. The feeding mechanism is connected to the feed port of the processing shell 10 to transport the external material to be processed to the station of the primary crushing component 8. A conveying pipe 15 is fixedly connected to the lower side of the processing shell 10. The screening mechanism includes an installation shell 18, in which a screening component 6 is installed. The screening component 6 includes at least one screening element. The conveying pipe 15 is connected to the feed end of the screening element, and the other end of the feed pipe 16 is connected to the discharge port at the lower end of the installation shell 18.

[0084] Under the action of the feeding mechanism, the aluminum slag and other materials to be processed enter the processing shell 10. The preliminary crushing component 8 will perform preliminary crushing on these materials. The pre-crushed materials are then conveyed to the screening component through the conveying pipe 15. Smaller-volume materials that meet the preset size specifications are screened out and enter the rotary kiln shell 17 through the feed pipe 16 for high-temperature smelting. In this way, this technical solution can complete the crushing and screening pretreatment of materials before they enter the high-temperature smelting stage, ensuring the relative uniformity of the particle size of the materials entering the kiln. This significantly improves the material's entry conditions into the furnace, fundamentally promotes the uniformity of heating of materials in the kiln, and reduces metal oxidation and burning loss and "cold nucleation" phenomena caused by local overheating or underheating, thereby achieving the goal of reducing melting loss and improving reaction efficiency and thermal energy utilization. At the same time, the integrated design avoids the additional transportation and site occupation problems caused by traditional independent pretreatment, improving the continuity and efficiency of the entire recycling process.

[0085] Reference Figure 1 , Figure 9 and Figure 10 The low melting loss and high efficiency combustion rotary kiln device provided in this application embodiment includes a crushing execution unit and a rotating mechanism in the preliminary crushing component 8.

[0086] The crushing unit includes two parallel crushing rollers 801; the rotating mechanism drives the crushing rollers 801 on both sides to rotate in opposite directions, thereby squeezing and shearing the material falling between the two crushing rollers 801 to achieve preliminary crushing.

[0087] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, the rotating mechanism of which includes a first electric motor 803 and two first gears 802.

[0088] The output end of the first motor 803 is fixedly connected to the shaft end of one of the crushing rollers 801; the first gears 802 are coaxially fixedly connected to the corresponding crushing rollers 801, and the two first gears 802 mesh with each other.

[0089] After the material to be processed is conveyed between the two crushing rollers 801, the first motor 803 starts. Since the two first gears 802 mesh with each other, the crushing rollers 801 on both sides will rotate in opposite directions to perform preliminary crushing of the material.

[0090] It should be noted that the above description uses a double-roll crushing mechanism as an example, but those skilled in the art will understand that the preliminary crushing component 8 can also be replaced by other suitable equipment in the prior art that can achieve the material crushing function, without departing from the core concept of this application.

[0091] Based on the above solution, the present application provides a low melting loss and high efficiency combustion rotary kiln device, in which a clearing mechanism is also installed on one side of the conveying pipe 15. The clearing mechanism includes a pusher rod 19 and at least one electric pusher rod 13. The pusher rod 19 passes through the conveying pipe 15, and the telescopic end of the electric pusher rod 13 is connected and fixed to the pusher rod 19 to drive the pusher rod 19 to move along its axial direction in order to clear the material in the conveying pipe 15 and prevent the material from blocking the conveying pipe 15.

[0092] Reference Figure 1 and Figure 9 The low melting loss and high efficiency combustion rotary kiln device provided in this application embodiment includes a feeding mechanism comprising a feeding hopper 14 and a conveyor belt 11.

[0093] The feeding hopper 14 is inserted and fixed to one side of the processing housing 10. The lower outlet of the feeding hopper 14 extends to the feeding station of the preliminary crushing component 8 to guide the material to the crushing area. The conveyor belt 11 is set on one side of the feeding hopper 14 with an inclined structure. The discharge end of the conveyor belt 11 is connected to the upper feed port of the feeding hopper 14 to receive the external material to be processed and lift it into the feeding hopper 14.

[0094] Workers use external equipment to feed the material to be processed onto the conveyor belt 11. As the conveyor belt 11 runs, the material is lifted to a high position and falls into the feed hopper 14. Then, guided by the feed hopper 14, it enters the station of the primary crushing component 8 for processing.

[0095] Reference Figure 2 , Figure 3 and Figure 4 The low melting loss and high efficiency combustion rotary kiln device provided in this application embodiment includes a screening component 6, which is a rotary screening part installed in the mounting housing 18 with an inclined structure. The rotary screening part includes a screening cylinder 602, a fixed cylinder 601 and a rotating mechanism.

[0096] The screening cylinder 602 has a cylindrical structure with sieve holes 615 densely distributed around its circumferential wall. Two fixed cylinders 601 are provided, symmetrically arranged at both ends of the screening cylinder 602. The fixed cylinders 601 are fixedly installed on the mounting housing 18, and the screening cylinder 602 is rotatably arranged between the two fixed cylinders 601. The lower end of the conveying pipe 15 is connected to the upper fixed cylinder 601, and the lower end of the lower fixed cylinder 601 is fixedly connected to a waste pipe 616, on which a discharge valve 604 is installed. The rotating mechanism is used to drive the screening cylinder 602 to rotate.

[0097] The pre-crushed material enters the fixed cylinder 601 above through the conveying pipe 15 and slides down the inclined screening cylinder 602 under the action of gravity. Driven by the rotating mechanism, the screening cylinder 602 rotates continuously, causing the material inside the screening cylinder to tumble continuously. Fine material that meets the particle size specification falls through the screen holes 615, achieving screening; coarse material that does not meet the specification remains in the cylinder and gradually moves to the lower end, and is finally discharged out through the waste pipe 616.

[0098] Based on the above solution, the present application provides a low melting loss and high efficiency combustion rotary kiln device, in which a pushing mechanism is also installed in the rotary screening section. The pushing mechanism includes a second motor 611, a rotating rod 608 and an auger conveyor.

[0099] The second motor 611 is installed on the outside of one of the fixed cylinders 601; the rotating rod 608 is rotatably disposed in the rotary screening section, and one end of the rotating rod 608 is connected and fixed to the output end of the second motor 611; the auger conveyor is fixedly installed on the rotating rod 608.

[0100] When screening the pre-crushed material, the second motor 611 starts, and the rotating rod 608 drives the auger conveyor to rotate in the opposite direction to the screening cylinder 602, thereby actively pushing the material in the screening cylinder 602 to the lower end and preventing the material from accumulating in the screening cylinder 602.

[0101] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, the rotating mechanism of which includes a transmission rod 614, a transmission belt 610, a second gear 607, and a gear ring 603.

[0102] The transmission rod 614 is rotatably disposed on the outside of one of the fixed cylinders 601. Pulleys 609 are sleeved and fixed on one side of the transmission rod 614 and the other side of the rotating rod 608. The transmission belt 610 is driven by friction with the pulleys 609. The second gear 607 is fixedly connected to the other side of the transmission rod 614. The toothed ring 603 is disposed on one side of the screening cylinder 602 and meshes with the second gear 607.

[0103] During the operation of the second motor 611, under the connection between the transmission belt 610 and the pulley 609, the transmission rod 614 will drive the second gear 607 to rotate. Since the gear ring 603 is meshed with the second gear 607, the screening cylinder 602 will then drive the material to be screened to rotate.

[0104] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The low melting loss and high efficiency combustion rotary kiln device provided in this application embodiment includes two first auger blades 612 as the auger conveyor. The two first auger blades 612 are fixedly installed on the rotating rod 608 at a certain distance apart. A crushing component 7 is correspondingly provided in the gap area between the two first auger blades 612. The crushing component 7 includes a grinding ring 701, multiple connecting rods and multiple crushing rollers.

[0105] The grinding ring 701 is embedded and fixed on the screening cylinder 602, and its inner ring surface forms the grinding working surface; the connecting rod is fixedly installed on the rotating rod 608 at the position between the two first auger blades 612. The connecting rod is evenly distributed in the circumferential direction and staggered in the axial direction to cover a longer grinding area. The crushing roller is fixedly installed on the outer end of the connecting rod.

[0106] The material enters the crushing station as it passes through the gap between the two first auger blades 612. Here, the grinding ring 701, fixed to the inner wall of the screening cylinder 602, rotates together with the cylinder. Simultaneously, the rotating rod 608 drives the crushing roller to rotate in the opposite direction to the screening cylinder 602. The material is squeezed and ground between the relatively moving grinding ring 701 and the crushing roller, achieving secondary crushing and improving the yield of qualified fine material.

[0107] Based on the above solution, the present application provides a low melting loss and high efficiency combustion rotary kiln device, wherein the connecting rod is made of an elastic telescopic rod, and the elastic telescopic rod includes a receiving sleeve 704, a sliding rod 706 and an elastic element 705.

[0108] The receiving sleeve 704 is fixedly installed on the rotating rod 608; the sliding rod 706 is slidably installed on the outside of the receiving sleeve 704, and the crushing roller is installed on the outer end of the sliding rod 706; the elastic element 705 is fixedly connected between the sliding rod 706 and the receiving sleeve 704.

[0109] During the rotation of the rotating rod 608, the receiving sleeve 704 drives the sliding rod 706 and the crushing roller to rotate synchronously in the opposite direction to the screening cylinder 602. When the receiving sleeve 704 drives the sliding rod 706 and the crushing roller to a high position, under the gravity of the crushing roller, the sliding rod 706 and the crushing roller will move downward and disengage from the grinding ring 701, effectively reducing unnecessary wear on both in the non-effective working area. Moreover, when the receiving sleeve 704 drives the sliding rod 706 and the crushing roller to a lower position, under the combined action of the gravity of the crushing roller and the restoring force of the elastic element 705, the crushing roller will impact the material and the working surface of the grinding ring 701 with a certain impact force. This can significantly improve the crushing effect of the material, and the periodic impact force will be transmitted to the entire screening cylinder 602 through the grinding ring 701, causing it to generate high-frequency micro-amplitude vibration. This can effectively shake off the material particles stuck in the screen holes 615, prevent the screen holes 615 from clogging, and thus maintain the continuous stability of screening efficiency.

[0110] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, wherein the crushing roller includes a fixed roller 702 and at least one rotating roller 703.

[0111] The fixed roller 702 is fixedly installed on the outer end of the sliding rod 706; the rotating roller 703 is constrained by the end of the fixed roller 702 and is rotatably connected to it.

[0112] When the crushing roller comes into contact with the material and the grinding ring 701, the rotating roller 703 can roll. Compared with pure sliding friction, this rolling contact is more conducive to producing a compound crushing effect of kneading and crushing the material, thus improving the crushing efficiency.

[0113] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, in which a flexible scraper 613 is fixedly installed on the outer edge of the first auger blade 612. The flexible scraper 613 is made of rubber or a flexible wear-resistant material with similar properties. The length direction of the flexible scraper 613 is adapted to the spiral edge of the first auger blade 612. The flexible scraper 613 maintains sliding contact with the inner wall of the screening cylinder 602.

[0114] The flexible scraper 613 possesses a certain degree of extensibility. On one hand, it can effectively absorb the impact of hard or agglomerated materials, preventing direct damage to the rigid edges of the first auger blade 612 and extending its service life. On the other hand, when the screening cylinder 602 vibrates due to the impact of the crushing roller, it can better adapt to the slight deformation and vibration of the cylinder wall, maintaining good contact at all times. This ensures that it can continuously and effectively scrape away fine powder materials adhering to the inner wall of the screening cylinder 602, preventing material from sticking to the wall and fully guaranteeing the ability to push materials.

[0115] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, in which buffer components are installed at both ends of the screening cylinder 602, and the buffer components include a driving ring 605 and an elastic connecting ring 606.

[0116] The drive ring 605 is installed inside the fixed cylinder 601 to limit rotation. An elastic connecting ring 606 is fixedly installed between the drive ring 605 and the screening cylinder 602. The elastic connecting ring 606 is made of rubber or polyurethane-based elastic material. As a core buffer medium, the elastic connecting ring 606 effectively attenuates the high-frequency vibrations generated by the screening cylinder 602 during high-speed rotation and the instantaneous impact force generated by the crushing rollers, preventing these vibrations from being directly transmitted to the fixed cylinder 601. This significantly reduces the overall noise and resonance risk during operation and improves the operational reliability of adjacent components.

[0117] Reference Figure 1 , Figure 2 and Figure 8 The embodiment of this application provides a low melting loss and high efficiency combustion rotary kiln device. The installation shell 18 is also fixedly connected to the exhaust gas pipe 12. The base base 1 is also installed on one side of the waste heat utilization component 9. The waste heat utilization component 9 includes a flue gas pipe 901, a tail gas burner 902, an induced draft device 907, an air supply pipe 905, an air distribution pipe 903, and multiple nozzles 906.

[0118] A flue gas pipe 901 is located on one side of the kiln head 3 to collect the flue gas generated after combustion in the furnace. A tail gas burner 902 is installed on the base 1, and the outlet end of the flue gas pipe 901 is connected to the inlet end of the tail gas burner 902. The inlet end of the induced draft fan 907 is connected to the outlet end of the tail gas burner 902. An air supply pipe 905 is fixedly connected to the outlet end of the induced draft fan 907. An air distribution pipe 903 is fixedly connected to the other end of the air supply pipe 905. A nozzle 906 is fixedly connected to the air distribution pipe 903 at certain intervals, and a one-way valve 904 is installed on the outlet side of the nozzle 906.

[0119] During the operation of the rotary kiln, the exhaust gas containing incompletely burned combustible components discharged from the kiln head 3 is transported to the exhaust gas burner 902 via the flue gas pipe 901. After being purified by the exhaust gas burner 902, the high-temperature gas, under the action of the induced draft device 907, sequentially passes through the air supply pipe 905 and the air distribution pipe 903, and finally enters each spray pipe 906. The high-temperature gas opens the one-way valve 904, forming a directional airflow that blows towards the screening cylinder 602. This not only preheats the material, reducing the heat energy consumption required to heat it to the reaction temperature in the rotary kiln, thereby improving the thermal efficiency of the entire system, but also, the directional airflow blowing towards the screen holes 615 helps prevent material adhesion or blockage of the screen holes 615, ensuring continuous and efficient operation of the screening process and reducing maintenance requirements.

[0120] Reference Figure 1 and Figure 11 The embodiment of this application provides a low melting loss and high efficiency combustion rotary kiln device. The rotary kiln body 17 is also equipped with a feeding and turning component 5. The feeding and turning component 5 includes a third motor 501, a rotating rod 502 and multiple stirring rods 503.

[0121] The third motor 501 is installed on the outside of the rotary kiln body 17; the rotating rod 502 is rotatably installed inside the rotary kiln body 17, and the end of the rotating rod 502 is connected to the output end of the third motor 501; the stirring rod 503 is fixedly installed on the rotating rod 502.

[0122] Based on the above scheme, the present application provides a low melting loss and high efficiency combustion rotary kiln device, wherein a plurality of turning plates 505 are installed on the radially outer side of the rotating rod 502, and the turning plates 505 are connected and fixed to the outer end of the stirring rod 503.

[0123] When the material is subjected to high-temperature treatment, the third motor 501 is started, and the rotating rod 502 drives the stirring rod 503 to rotate in the opposite direction to the rotary kiln cylinder 17, actively cutting and stirring the material inside the cylinder. At the same time, the tipping plate 505 will tip and throw the material. In this way, the accumulation layer formed by the material due to its own weight is broken, so that the material particles are in more sufficient and uniform contact with the high-temperature kiln gas and the kiln wall, which greatly improves the heat exchange efficiency and chemical reaction rate inside the rotary kiln cylinder 17.

[0124] Based on the above scheme, the embodiment of this application provides a low melting loss and high efficiency combustion rotary kiln device, wherein the feeding and turning component 5 further includes a rotating shaft 507, a second auger blade 506, and a driving mechanism.

[0125] The rotating shaft 507 is rotatably disposed inside the feed pipe 16; the second auger blade 506 is sleeved and fixed on the rotating shaft 507; and the driving mechanism is used to drive the rotating shaft 507 to rotate.

[0126] Based on the above solution, this application provides a low melting loss and high efficiency combustion rotary kiln device, the driving mechanism of which includes two bevel gears 508 and a protective box 504.

[0127] Among them, bevel gears 508 are respectively sleeved and fixed on one side of rotating shaft 507 and rotating rod 502, and the two bevel gears 508 mesh vertically; the protective box 504 is covered on the outside of the two bevel gears 508 and is connected and fixed to the feed pipe 16.

[0128] When the rotating rod 502 rotates, the rotating shaft 507, connected by the bevel gear 508, drives the second auger blade 506 to rotate, generating axial thrust to stably and continuously push the material in the feed pipe 16 into the rotary kiln shell 17. This avoids the problems of intermittent feeding, blockage, or material slugging that can occur when relying solely on gravity feeding, ensuring the stability and uniformity of material supply to the main kiln. At the same time, the second auger blade 506 can also form a dynamic seal within the feed pipe 16, helping to reduce heat loss within the rotary kiln shell 17.

[0129] Reference Figure 1 This application provides a low-loss, high-efficiency combustion rotary kiln device. The rotary kiln shell 17 integrates a combustion system for high-temperature material processing and a temperature control system to ensure stable process temperature. The rotary kiln shell 17 is supported and driven by an external transmission device to rotate around its axis, thereby completing the material conveying and tumbling. The combustion system, temperature control system, and transmission device adopt conventional configurations in the art, and their specific structures are not the focus of this application's improvement and will not be described in detail here.

[0130] The implementation principle of the low-loss, high-efficiency combustion rotary kiln device in this application embodiment is as follows: When relevant personnel need to use this technical solution to process materials such as aluminum slag, the personnel first feed the aluminum slag material to be processed onto the conveyor belt 11. The conveyor belt 11 lifts the material and unloads it into the feed hopper 14. The material is guided by the feed hopper 14 and falls between two crushing rollers 801. Then, the first motor 803 runs, and the two crushing rollers 801 rotate in opposite directions to perform preliminary crushing of the material.

[0131] The pre-crushed material enters the screening cylinder 602 through the conveying pipe 15. During this process, the second motor 611 operates, and the screening cylinder 602 rotates around its axis. Simultaneously, the rotating rod 608 drives the first auger blades 612 to rotate in the opposite direction to the screening cylinder 602, pushing the material towards the lower end of the screening cylinder 602. In this process, qualified fine material falls through the screen holes 615.

[0132] When the material passes between the two first auger blades 612, the rotating grinding ring 701, along with the fixed roller 702 and the rotating roller 703 that rotate in the opposite direction with the rotating rod 608, will perform secondary crushing on the material. Coarse material that fails to pass through the sieve hole 615 will be pushed to the lower end of the screening cylinder 602 and finally discharged through the waste pipe 616.

[0133] The qualified fine material screened out enters the feed pipe 16 through the discharge port at the lower end of the housing 18. At this time, the third motor 501 starts, and under the connection of the bevel gear 508, the rotating shaft 507 drives the second auger blade 506 to rotate, stably conveying the material in the feed pipe 16 to the inside of the rotary kiln cylinder 17.

[0134] When the rotary kiln cylinder 17 rotates to melt the material at high temperature, the rotating rod 502 will drive the stirring rod 503 and the turning plate 505 to rotate in the opposite direction to the rotary kiln cylinder 17, stirring and turning the material inside the rotary kiln cylinder 17, so that the material is heated evenly.

[0135] During the operation of the rotary kiln, high-temperature exhaust gas enters the exhaust gas burner 902 through the flue gas pipe 901 for purification and combustion. The purified high-temperature gas, under the action of the induced draft fan 907, enters each spray pipe 906 through the air supply pipe 905 and the air distribution pipe 903, and opens the one-way valve 904, blowing it toward the screening cylinder 602 to preheat the material.

[0136] After smelting, the material is discharged through discharge pipe 4. This process continues to complete the processing of aluminum slag and other waste aluminum.

Claims

1. A low-loss, high-efficiency combustion rotary kiln device, characterized in that: Include: Basic base (1); A rotary kiln device is set on a base (1). The rotary kiln device includes a kiln tail (2), a kiln head (3) and a rotary kiln cylinder (17) connected between the two. A feed pipe (16) is connected to the kiln tail (2) and a discharge pipe (4) is connected to the kiln head (3). A preliminary crushing mechanism, comprising a processing housing (10), wherein a preliminary crushing component (8) is installed inside the processing housing (10), wherein the waste aluminum or aluminum slag material fed into the preliminary crushing component (8) is subjected to preliminary crushing operation to reduce its overall size span; The feeding mechanism is connected to the feed port of the processing housing (10) and is used to transport the external material to be processed to the primary crushing component (8) station. The processing housing (10) is fixedly connected to the lower side of the conveying pipe (15). The screening mechanism includes a mounting housing (18), a screening component (6) is installed inside the mounting housing (18), the screening component (6) includes at least one screening element, the conveying pipe (15) is connected to the feed end of the screening element, and the other end of the feed pipe (16) is connected to the discharge port at the lower end of the mounting housing (18).

2. The low-loss, high-efficiency combustion rotary kiln device according to claim 1, characterized in that: A clearing mechanism is also installed on one side of the conveying pipe (15). The clearing mechanism includes a push rod (19) and at least one electric push rod (13). The push rod (19) is inserted into the conveying pipe (15). The telescopic end of the electric push rod (13) is connected and fixed to the push rod (19) to drive the push rod (19) to move along its axial direction in order to clear the material in the conveying pipe (15) and prevent the material from blocking the conveying pipe (15).

3. The low-loss, high-efficiency combustion rotary kiln device according to claim 1, characterized in that: The feeding mechanism includes: The feeding hopper (14) is inserted and fixed to one side of the processing housing (10). The lower outlet of the feeding hopper (14) extends to the feeding station of the primary crushing component (8) to guide the material to the crushing area. The conveyor belt (11) is inclined and located on one side of the feed hopper (14). The unloading end of the conveyor belt (11) is connected to the upper feed port of the feed hopper (14).

4. The low-loss, high-efficiency combustion rotary kiln device according to claim 1, characterized in that: The screening assembly (6) includes a rotary screening section, which is installed in an inclined structure within the mounting housing (18). The rotary screening section includes: Screening cylinder (602), the screening cylinder (602) is a cylindrical structure, and its cylinder wall is densely covered with screen holes (615) in the circumferential direction. Two fixed cylinders (601) are provided and are symmetrically arranged at both ends of the screening cylinder (602). The fixed cylinders (601) are fixedly installed on the mounting housing (18). The screening cylinder (602) is rotatably arranged between the two fixed cylinders (601). The lower end of the conveying pipe (15) is connected to the upper fixed cylinder (601). The lower end of the lower fixed cylinder (601) is fixedly connected to a waste pipe (616). A discharge valve (604) is installed on the waste pipe (616). A rotating mechanism is used to drive the screening cylinder (602) to rotate.

5. The low-loss, high-efficiency combustion rotary kiln device according to claim 4, characterized in that: The rotary screening section is also equipped with a pushing mechanism, which includes: The second motor (611) is mounted on the outside of one of the fixed cylinders (601); A rotating rod (608) is rotatably disposed in the rotary screening section, and one end of the rotating rod (608) is connected and fixed to the output end of the second motor (611); Screw conveyor, which is fixedly installed on the rotating rod (608).

6. The low-loss, high-efficiency combustion rotary kiln device according to claim 5, characterized in that: The rotating mechanism includes: A transmission rod (614) is rotatably disposed on the outside of one of the fixed cylinders (601), and pulleys (609) are sleeved and fixed on one side of the transmission rod (614) and the side of the rotating rod (608). A transmission belt (610) is used for frictional transmission with a pulley (609); The second gear (607) is fixedly connected to the other side of the transmission rod (614); A toothed ring (603) is disposed on one side of the screening cylinder (602), and the toothed ring (603) is meshed with the second gear (607).

7. The low-loss, high-efficiency combustion rotary kiln device according to claim 5, characterized in that: The auger conveyor includes two first auger blades (612), which are fixedly mounted on the rotating rod (608) at a certain distance apart. A crushing component (7) is correspondingly provided in the gap area between the two first auger blades (612). The crushing component (7) includes: Grinding ring (701), the grinding ring (701) is embedded and fixed on the screening cylinder (602), and its inner ring surface constitutes the grinding working surface; Multiple connecting rods are fixedly installed on the rotating rod (608) at a position between the two first auger blades (612). The connecting rods are evenly distributed in the circumferential direction and staggered in the axial direction. The connecting rods are made of elastic telescopic rods, which include: A receiving sleeve (704) is fixedly installed on the rotating rod (608); A sliding rod (706) is slidably mounted on the outside of the receiving sleeve (704), and the crushing roller is mounted on the outer end of the sliding rod (706); An elastic element (705) is fixedly connected between the sliding rod (706) and the receiving sleeve (704); Multiple crushing rollers are fixedly mounted on the outer end of a connecting rod, and the crushing rollers include: A fixed roller (702) is fixedly installed on the outer end of a sliding rod (706); At least one rotating roller (703) is constrained at the end of a fixed roller (702) and rotatably connected thereto.

8. The low-loss, high-efficiency combustion rotary kiln device according to claim 7, characterized in that: A flexible scraper (613) is fixedly installed on the outer edge of the first auger blade (612). The flexible scraper (613) is made of rubber or a flexible wear-resistant material with similar properties. The length direction of the flexible scraper (613) is adapted to the spiral edge of the first auger blade (612). The flexible scraper (613) maintains sliding contact with the inner wall of the screening cylinder (602). Both ends of the screening cylinder (602) are equipped with buffer components, which include: A drive ring (605) is installed at the inner end of a fixed cylinder (601) for limited rotation. An elastic connecting ring (606) is fixedly installed between the driving ring (605) and the screening cylinder (602). The elastic connecting ring (606) is made of rubber or polyurethane elastic material.

9. The low-loss, high-efficiency combustion rotary kiln device according to claim 1, characterized in that: An exhaust pipe (12) is also fixedly connected to the mounting housing (18), and a waste heat utilization component (9) is also installed on one side of the base base (1). The waste heat utilization component (9) includes: The flue gas pipe (901) is located on one side of the kiln head (3) and is used to collect the flue gas generated after the furnace body is burned. The exhaust gas burner (902) is mounted on the base base (1), and the exhaust gas pipe (901) outlet end is connected to the exhaust gas burner (902) inlet end; An exhaust fan (907) is provided, wherein the air inlet of the exhaust fan (907) is connected to the air outlet of the exhaust gas burner (902); An air supply pipe (905) is fixedly connected to the air outlet end of the induced draft device (907); An air distribution pipe (903) is fixedly connected to the other end of an air supply pipe (905); Multiple nozzles (906) are fixedly connected to the air distribution pipe (903) at certain intervals, and a one-way valve (904) is installed on the air outlet side of the nozzles (906).

10. The low-loss, high-efficiency combustion rotary kiln device according to claim 1, characterized in that: The rotary kiln body (17) is also equipped with a feeding and tilting assembly (5), which includes: The third electric motor (501) is installed on the outside of the rotary kiln shell (17); A rotating rod (502) is rotatably disposed inside the rotary kiln cylinder (17), and the end of the rotating rod (502) is connected to the output end of a third motor (501); Multiple stirring rods (503) are fixedly mounted on a rotating rod (502); A plurality of tipping plates (505) are installed on the radially outer side of the rotating rod (502), and the tipping plates (505) are connected and fixed to the outer end of the stirring rod (503); The feeding and turning assembly (5) also includes: A rotating shaft (507) is rotatably disposed inside the feed pipe (16); The second auger blade (506) is sleeved and fixed on the rotating shaft (507); A driving mechanism, used to drive the rotating shaft (507) to rotate, the driving mechanism comprising: Two bevel gears (508) are respectively sleeved and fixed on one side of the rotating shaft (507) and the rotating rod (502), and the two bevel gears (508) mesh vertically; The protective box (504) is placed on the outside of the two bevel gears (508) and is connected and fixed to the feed pipe (16).

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