Anti-clogging preheating channel for waste aluminum screening

Abstract

This invention discloses an anti-clogging preheating channel for waste aluminum screening. The scheme employs an inclined preheating channel, utilizing the weight of the waste material for conveying and preheating. Multiple baffles are spaced apart within the preheating channel, each dividing the channel into independent preheating zones. The opening and closing of the baffles allows for batch conveying and control of the waste material. The baffles utilize a two-section interruption structure, with a guiding mechanism at the interruption point. The guiding mechanism includes a guiding component and an actuating component, which clears blocked waste material when the baffles are open. The guiding component uses inclined guide channels or guide surfaces to guide the movement of the waste material; the actuating component includes a sliding actuator that drives the guiding component to move up and down. The bottom of the guiding component is equipped with rollers or other rolling devices, ensuring rolling contact with the waste material. Overall, this invention provides a simple, practical, effective, and easily implemented anti-clogging preheating channel technology for waste aluminum screening.

Description

Technical Field

[0001] This invention relates to the field of recycled metal processing technology, and more particularly to a blockage prevention technology in the preheating process of waste aluminum. Specifically, the purpose of this invention is to realize the reuse of waste aluminum, belonging to the field of recycled metal processing technology. Background Technology

[0002] With socio-economic development, aluminum consumption has continued to grow, generating a large amount of scrap aluminum. Recycling and reusing scrap aluminum can not only save resources and energy but also reduce environmental pollution. Relevant patent literature includes, for example:

[0003] Authorized Publication No. CN102839288B: A Low-Temperature Rapid Melting Process for Recycled Aluminum Alloys

[0004] Authorization Publication No. CN112403602B - A Crushing and Screening Machine for Electrolytic Aluminum Waste

[0005] Authorization Publication No. CN113441423B - A sorting device for recycled aluminum production and a recycled aluminum production process using the same. Therefore, developing efficient waste aluminum screening technology is of great significance.

[0006] Currently, collected scrap aluminum often contains non-metallic impurities such as plastics, rubber, and wood. To remove these impurities, magnetic separators are typically used to separate magnetic materials, but non-magnetic impurities such as plastics are still difficult to remove effectively. The flotation method can remove some impurities, but it requires an additional drying step, making the operation more complex. Furthermore, these residual non-metallic impurities generate harmful gases during the smelting process, polluting the environment and reducing the quality of the molten aluminum.

[0007] On the other hand, in aluminum ingot production, molten aluminum from the smelting furnace is poured, cooled, and conveyed by a conveyor belt to eventually form solid aluminum ingots. During this process, a significant amount of heat is released into the environment. If the heat from the aluminum ingot conveyor belt could be recovered for pre-treatment of scrap aluminum, it would not only further save energy but also reduce the complexity of scrap aluminum disposal. However, due to the limited inclination angle of the aluminum ingot conveyor belt, the preheating channel used for transporting scrap needs to be enclosed and extremely narrow to maximize heat absorption. This causes scrap to easily clog and accumulate in the narrow preheating channel under gravity. Once a blockage occurs, it severely hinders the transport of scrap.

[0008] Therefore, developing a new technology that can absorb heat from the aluminum ingot conveyor belt to preheat and screen scrap aluminum, while simultaneously solving the problem of waste material blockage in the preheating channel, has significant economic and social implications. This not only reduces the number of steps in scrap aluminum processing but also allows for further energy recovery, demonstrating promising application prospects. Summary of the Invention

[0009] In view of this, the present invention provides a preheating channel for screening waste aluminum to prevent clogging. By setting a baffle in the preheating channel that can perform a combined action to clear the clogging waste, effective clearing is achieved and clogging of the preheating channel is avoided.

[0010] The technical solution of this invention is implemented as follows: A preheating channel for preventing clogging during waste aluminum screening, comprising:

[0011] A preheating channel that is inclined and transported using the weight of the object itself;

[0012] Multiple baffles are spaced apart within the preheating channel, each baffle forming an independent preheating zone. The intermittent batch conveying of waste material is controlled by opening and closing the baffles.

[0013] The drainage mechanism installed in the barrier can drain the blocked waste when the barrier is opened.

[0014] Preferably, the barrier is a two-section interrupted structure, with the interrupted section used to install the diversion mechanism. This preferred technical solution defines the barrier as a two-section structure, which facilitates the installation of the diversion mechanism.

[0015] Preferably, the preheating channel has a rectangular cross-section. This preferred technical solution defines the preheating channel with a rectangular cross-section, which has the advantages of simple structure and easy processing.

[0016] Preferably, the barrier is kept closed by a tension spring; adjacent rocker arms of the barrier are connected by a connecting rod; an external force is applied to the connecting rod to open the barrier. This preferred technical solution defines the spring return mechanism of the barrier, which has the advantage of maintaining stable opening and closing of the barrier.

[0017] Preferably, the system also includes a track fixedly mounted on the outer surface of the preheating channel; and a slidable movable actuator mounted on the track. The movable actuator includes a moving platform and an actuating structure mounted on the moving platform, the actuating structure being used to press the connecting rod to open the barrier. This preferred technical solution adds a track actuator, which has the advantage of allowing for accurate opening of the barrier.

[0018] Preferably, the dredging mechanism includes a guiding component and an actuating component; the actuating component drives the dredging element to perform a combined downward pressing action and a swinging action on the waste material. This preferred technical solution proposes a dredging mechanism that includes a guiding component and an actuating component, which has the advantages of reasonable structure and clear function.

[0019] Preferably, the guide component is an angled guide groove or a guide surface. This preferred technical solution limits the form of the guide component, and its beneficial effect is good guiding effect.

[0020] Preferably, the actuating component includes a sliding connector, which drives the guiding component to move up and down. This preferred technical solution limits the actuating component to include a sliding connector, which has the advantage of smooth execution.

[0021] Preferably, the guide component has a rolling device at its bottom, and the contact method with the waste is rolling contact. This preferred technical solution defines the rolling contact method of the guide component, which has the beneficial effect of reducing damage to the waste.

[0022] Preferably, a sealing device is used between the inner wall of the preheating channel and the baffle. This preferred technical solution adds a sealing device between the baffle and the channel, which has the beneficial effect of preventing leakage.

[0023] Preferably, the evacuation mechanism adopts a slider-type actuation structure, which includes:

[0024] An installation part is provided on the opposite side of two adjacent baffles, and the installation part is provided with an inclined guide channel;

[0025] A guide rod is provided on one side of the guide channel, with one end of the guide rod fixed and the other end provided with a limiting component;

[0026] A slider that is mounted on the guide rod and can slide;

[0027] A compression spring fitted around the outer periphery of the guide rod to abut against the slider and the baffle;

[0028] The housing of the mechanism connecting the slider is rotated.

[0029] A guide component fixedly installed within the housing of the mechanism;

[0030] A belt drive assembly that connects to the actuator motor and drives the housing of the mechanism to rotate;

[0031] The actuator motor drives the belt transmission assembly, causing the mechanism housing and guide component to rotate. The compression spring drives the slider and guide component to slide up and down, realizing a combined downward pressing and swinging action of the guide component. This preferred technical solution proposes a slider-type actuator structure, which has the advantage of flexible and varied execution actions.

[0032] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0033] This invention discloses a preheating channel for preventing blockages in waste aluminum screening. Multiple baffles are spaced apart within the inclined preheating channel to form independent preheating zones for batch conveying. A guiding mechanism, consisting of guide components and actuators, is installed within the baffles. A slider-type actuator drives the guiding components to perform a combined downward pressing and swinging motion, effectively clearing blockages in the waste material when the baffles are open. This prevents blockages in the preheating channel, ensuring stable and continuous conveying and preheating of the waste material. This invention achieves a simple, effective, and easily implemented preheating channel for preventing blockages in waste aluminum screening. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the present invention;

[0035] Figure 2 for Figure 1 A magnified view of a section at point A, showing the motion of the connecting rod being pushed;

[0036] Figure 3 This is a structural diagram of the mobile actuator, drive mechanism, and execution structure, some of which are in an exploded state.

[0037] Figure 4 This is a structural diagram of the barrier, showing the evacuation mechanism in operation.

[0038] Figure 5 This is a structural diagram of the barrier from another angle, showing the dredging mechanism in operation.

[0039] Figure 6 This is a schematic diagram of the working state of the present invention, in which one of the barriers is in an open state.

[0040] Reference numerals: Preheating channel 1, rotating shaft hole 11, conveyor belt 01, mounting shaft 02, contact wheel 03, bearing seat 04, straight rack 05, reversing gear 06, actuator 07, cylinder 08, baffle 3, plate 31, swing arm 32, connecting rod 33, fixed guide rail 331, moving actuator 332, drive mechanism 333, actuator structure 334, tension spring 34, guiding mechanism 4, mounting part 41, guide channel 42, guide rod 43, slider 44, compression spring 45, mechanism housing 46, guiding component 47, belt drive assembly 48, actuator motor 49. Detailed Implementation

[0041] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0042] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0043] The embodiments of the present invention will now be described in detail with reference to all the accompanying drawings.

[0044] This invention provides a technical solution for an anti-clogging preheating channel in waste aluminum screening. This solution utilizes the waste heat from the conveyor belt lifting section during aluminum ingot production in a smelting furnace to preheat the waste aluminum. Simultaneously, by setting up multiple sets of baffles and a matching guiding mechanism, the waste material conveying is controlled and guided, preventing blockage inside the preheating channel.

[0045] The specific plan includes:

[0046] A preheating channel 1 is attached to the upper surface of the inclined conveyor belt 01 for preheating scrap aluminum blocks. The preheating channel 1 has a rectangular cross-section with reasonable dimensions to ensure smooth passage of the aluminum blocks. Rotary shaft holes 11 for installing gates are provided at regular intervals on the side wall of the preheating channel 1. The preheating channel 1 is made of high-temperature resistant, heat-insulating stainless steel to accommodate the waste heat preheating process and reduce heat loss.

[0047] like Figure 1-6 As shown, the preheating channel 1 can also be designed with a circular cross-section to facilitate flow and reduce resistance. In the case of a rectangular structure, a guiding arc surface can be provided for a smooth transition. The contact surface between the preheating channel 1 and the aluminum ingot conveyor belt 01 is precision machined to ensure good thermal contact and improve heat transfer efficiency.

[0048] The dimensions and position of the pivot hole 11 are precisely designed to ensure installation stability. The inner wall of the pivot hole 11 is coated to improve friction performance and lifespan.

[0049] A baffle 3 is spaced out within the preheating channel 1 to form an independent preheating space for controlling the quantitative batching of waste material. A two-section interrupted plate 31 is rotatably connected to each pivot hole 11, with the interrupted section used to install the guiding mechanism 4. The plate 31 is a rectangular thin plate structure, its dimensions matching the internal space of the preheating channel 1. A limiting block is provided at an appropriate position along the edge of the plate 31 to contact the top wall and limit the opening angle. The plate 31 is held closed by a tension spring 34. The plate 31 is connected to the preheating channel 1 by a swing arm 32 via a mounting shaft 02 and a connecting rod 33. One interrupted end of the mounting shaft 02 is positioned and installed via a bearing seat 04. Applying external force to the connecting rod 33 opens the plate.

[0050] The connection between plate 31 and the pivot uses a ball bearing made of high-temperature alloy to ensure normal function and minimize frictional resistance in high-temperature environments. Plate 31 can be made of high-temperature alloy or other materials to improve thermal stability.

[0051] The stability of the plate's opening and closing movements is achieved through a spring return mechanism, including a return spring assembly on the base on the side or bottom of the plate. The return spring is made of a spring material with good thermal stability.

[0052] The plate seal uses high-temperature sealing material, and the gap between it and the inner wall of the channel is precisely controlled to prevent airflow leakage from affecting the sorting effect. Cooling devices can also be installed on the rotating parts of the plate to prevent overheating and shorten its service life.

[0053] This improves the gate's sealing performance, high-temperature resistance, and lifespan, ensuring precise control over the amount of waste.

[0054] In another specific embodiment, the actuator that applies external force to the connecting rod 33 adopts a track-type structure. This structure includes:

[0055] Fixed guide rail 331: A rail bar made of steel or stainless steel is fixedly installed on the outer upper surface of the preheating channel 1. The rail bar has a circular, I-shaped, or grooved cross-section, possessing sufficient strength and rigidity to prevent deformation due to temperature changes. A coating treatment can also be applied to the rail surface to improve wear resistance.

[0056] The mobile actuator 332 includes a mobile platform and an actuator structure 334 mounted on the mobile platform. The mobile platform is slidably connected to a fixed guide rail via a high-precision axle, allowing it to slide back and forth along the fixed guide rail. A shock-absorbing and buffering device can also be installed at the bottom of the platform to achieve smoother movement.

[0057] Drive mechanism 333: A small rack and worm motor drives the rack to move the platform linearly and reciprocatingly. The drive system is precise, efficient, and has a long service life. The motor power is rationally designed and used in conjunction with a reducer.

[0058] The actuator 334 can be a mechanical spring, cylinder, or hydraulic actuator, etc. Their common feature is that they can contact and press the connecting rod during movement, and then disengage from it. The actuation force can be precisely controlled, and the retraction position is precisely controlled by a limit switch. In this embodiment, the actuator 334 is powered by a cylinder 08 pushing a linear rack 05 to move. The linear rack 05 drives the meshing reversing gear 06 to rotate. The reversing gear 06 drives the connected actuator 07 to tilt one end upwards, making it parallel to or higher than the connecting rod in height. Under the propulsion of the drive mechanism 333, the actuator 334 completes the action of pressing the connecting rod.

[0059] During operation, the drive mechanism moves the mobile platform to the connecting rod, the actuator contacts and presses the connecting rod to overcome the tension of the spring, opening the plate. Then the platform moves back, the actuator disengages, and the plate closes under the action of the spring.

[0060] Compared to rotary actuators, track-type actuators offer smoother movement and are unaffected by plate rotation. By controlling the drive mechanism, the opening and closing force can be precisely applied, achieving intermittent and stable control of the plate.

[0061] The installation of the guiding mechanism 4 within the plate 31 must meet the following requirements: When the plate 31 is closed, the guiding mechanism 4 should be parallel to the plate 31 and maintain a minimal gap to prevent waste flow between adjacent spaces. When the plate 31 is open, the guiding mechanism 4 determines whether to activate the guiding function based on the waste flow situation—it does not need to be activated when the waste flows smoothly, but it will activate when blockage occurs to prevent damage to the channel. The guiding action should prevent the scrap aluminum from damaging the channel wall.

[0062] The evacuation mechanism 4 consists of two parts: a guiding device and an execution device.

[0063] The guiding device uses an angled guide hole structure to guide the movement of waste materials. The guide hole can be designed as a rectangular or rounded groove.

[0064] The actuator drives the guide component 47 to perform a combined downward pressing and swinging guiding action on the waste material. The actuator can be structured using a cylinder push rod, an eccentric wheel, etc. Alternatively, a motor can be used to drive the guide component 47 to rotate.

[0065] The guide component 47 is designed with a blunt head to avoid entanglement with waste material. It can be made of wear-resistant and high-temperature-resistant materials. The guiding and actuating devices are also made of high-temperature-resistant and wear-resistant materials. The moving parts of the device are equipped with lubrication devices and low-friction bearings to reduce resistance.

[0066] The guiding and actuating devices are precisely sized, and their transmission movements are accurately matched to achieve combined dredging actions. The device can be modularly designed for easy maintenance and replacement.

[0067] In another embodiment, the dredging mechanism 4 employs a slider-type actuation structure. This structure includes:

[0068] In each of the two plates 31 of each baffle 3, an outwardly flanged mounting portion 41 is provided on one side of each other, and an inclined guide channel 42 is provided on the mounting portion. The guide channel must have an inclination that is slightly lower at the end away from the mounting axis 02 when the plate is opened; a guide rod 43 is arranged parallel to one side of the guide channel 42, with the side of the guide rod 43 away from the mounting axis 02 being a fixed end and the other end being a free end, and a limiting nut is provided at the end of the free end; the surface of the guide channel is coated to improve wear resistance. A slider 44 is sleeved on the guide rod 43, and a compression spring 45 is sleeved on the outer periphery of the guide rod 43. The slider is partially embedded in the guide channel and fits tightly with the shape of the channel. The two ends of the spring abut against the slider and the plate respectively, providing a return spring force. A mechanism housing 46 is rotatably connected to the slider 44 at the middle, which can drive the slider 44 to slide back and forth; a guide member 47 is fixedly set in the mechanism housing 46; and a belt drive assembly 48 is connected to the actuator motor 49 to drive the mechanism housing 46 to rotate.

[0069] The actuator 49 is a small servo motor, using a worm gear reduction mechanism. The drive system's power and torque are rationally designed, resulting in precise, sensitive, and vibration-free motion. A cooling device has been incorporated to improve adaptability.

[0070] The evacuation actuator 47 is made of wear-resistant and high-temperature-resistant materials with a smooth surface treatment. It contacts the waste material via a rolling mechanism to avoid scratching the waste surface. It can also be designed with a belt drive for rotation.

[0071] The working principle of the traffic control mechanism is:

[0072] 1. After the motor is turned on, it drives the belt drive to rotate, causing the housing of the mechanism connected to it to begin to rotate slowly clockwise;

[0073] 2. When the housing of the mechanism rotates, its upper end will rub against and collide with the top wall of the preheating channel;

[0074] 3. Under the action of the counterforce generated by this collision, the slider fixedly connected to the housing of the mechanism will be driven to slide downward along the inclined guide groove;

[0075] 4. When the slider slides downwards, it will drive the dredging actuator, i.e. the dredging component, located at the top of the slider, to move downwards along the direction of the guide groove;

[0076] 5. Through vertical movement combined with three-dimensional rotation, the front end of the dredging component can pry, squeeze, and guide the blockage in a three-dimensional direction, achieving a highly efficient composite dredging action that combines downward pressing with rotational guidance;

[0077] 6. This combined action is significantly superior to a single linear push and press, allowing for more flexible and effective unblocking of waste materials;

[0078] 7. Another method of dredging is to have the mechanism housing rotate approximately 60 to 120 degrees, then automatically stop working and reverse to reset, periodically repeating the above-mentioned dredging process;

[0079] 8. Alternatively, other transmission methods, such as gear transmission or rack and pinion transmission, can be used instead of belt transmission; the movement of the slider and guide components can also be designed to be curvilinear, enriching the guiding action and improving the effect. The drive equipment can also use hydraulic cylinders or pneumatic push rods instead of motors to provide power.

[0080] Based on the foregoing embodiments, the following improvements can also be made:

[0081] 1. The guide component can be configured with a belt drive structure, enabling it to rotate when in contact with the waste material. This avoids direct rigid collisions and allows for a gentler contact method, improving efficiency and reducing secondary damage to the waste material. Furthermore, the rotating structure of the guide component can utilize gear drives, friction wheels, or other alternatives to belt drives.

[0082] 2. The belt drive structure also changes the contact between the guide component and the top wall of the preheating channel to a rolling contact between the pulley and the top wall, which reduces frictional losses between them. Alternatively, ball bearings or similar materials can be used between the guide component and the top wall to achieve rolling contact and further reduce frictional losses.

[0083] 3. A pulley or other contact wheel can be installed on one side of the lower part of the mechanism housing. This allows the mechanism housing to make contact with the top wall in advance when it rotates. In addition to pulleys, pulleys, ball bearing wheels, or other similar contact wheels can also be installed on one side of the mechanism housing to make early contact with the top wall.

[0084] 4. Early contact of the contact wheel allows the mechanism housing to generate sufficient resistance more quickly, thereby driving the slider and guide component to move, enriching the motion trajectory of the guide component and improving the dredging efficiency. Furthermore, the motion of the slider and guide component can also be designed as spiral motion, rhythmic oscillation, etc., further enriching the motion modes of the guide component.

[0085] 5. The above improvements can enhance the adaptability of the guide components to waste and equipment, achieving gentler and more efficient dredging, while also better protecting the equipment itself.

[0086] 6. Cooling or heating devices can also be installed to control the temperature of the device and improve its adaptability.

[0087] In one embodiment, the guiding device of the dredging mechanism 4 adopts a rectangular oblique guide groove structure, and the surface of the guide groove is coated to improve wear resistance. The actuator is a pneumatic cylinder, and its output end is fixedly connected to the dredging component 47. The head of the dredging component 47 is hemispherical, which allows for rolling contact with the waste material. The pneumatic cylinder is powered by compressed air, and the flow is controlled by a pneumatic valve to obtain a slow and smooth push-pull motion. The dimensions of the guiding device and the actuator are matched to ensure that the dredging component 47 can move smoothly within the guide groove. During operation, the pneumatic cylinder drives the dredging component 47 to move downward and rotate along the guide groove, performing composite dredging of the waste material. This embodiment has a simple structure, and the dredging motion can be precisely controlled by adjusting the air source parameters.

[0088] In another embodiment, the guiding device of the dredging mechanism 4 is an arc-shaped guide surface with a surface coating. The actuating device includes an actuating motor, a coupling, and a gear pair. The motor output shaft is connected to the first gear via the coupling, and the first gear drives the fork-shaped linkage mechanism, enabling the dredging component 47 to achieve a compound curved oscillating motion. The bottom of the dredging component 47 has a small-diameter protruding rotary wheel, which rolls when in contact with waste. The motor speed is controlled by frequency conversion, which can change the oscillation frequency of the dredging component. This embodiment uses curved oscillation dredging, resulting in rich motion trajectories and improved dredging effect. The structure is slightly complex but precise and controllable.

[0089] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A preheating channel for screening waste aluminum to prevent clogging, characterized in that... ,include: A preheating channel that is inclined and transported by the weight of the object (1); Multiple baffles (3) are spaced apart in the preheating channel (1), each baffle (3) forming an independent preheating zone. The intermittent batch conveying of waste material is controlled by opening and closing the baffles (3). The dredging mechanism (4) installed in the baffle (3) can dredge the blocked waste when the baffle (3) is opened; The barrier (3) is a two-section interrupted structure, and the interrupted section is used to install the diversion mechanism (4); The dredging mechanism (4) adopts a slider-type execution structure, which includes: An installation part (41) is provided on the opposite side of two adjacent baffles (3), and an inclined guide channel (42) is provided on the installation part (41); A guide rod (43) is provided on one side of the guide channel (42), with one end of the guide rod (43) fixed and the other end provided with a limiting member; A slider (44) is mounted on the guide rod (43) and is slidable; A compression spring (45) is fitted around the outer periphery of the guide rod (43) to abut against the slider (44) and the baffle (3); Rotate the housing (46) in the middle of the connecting slider (44); A guide member (47) is fixedly installed inside the housing (46) of the mechanism; A belt drive assembly (48) that connects to the actuator motor (49) and drives the mechanism housing (46) to rotate; The actuator motor (49) drives the belt drive assembly (48) to work and drive the mechanism housing (46) and the guide component (47) to rotate. The compression spring (45) drives the slider (44) and the guide component (47) to slide up and down, realizing the combined downward pressing and swinging action of the guide component (47).

2. The waste aluminum screening anti-clogging preheating channel as described in claim 1, characterized in that... The preheating channel (1) has a rectangular cross-section.

3. The waste aluminum screening anti-clogging preheating channel as described in claim 1, characterized in that... The barrier (3) is kept closed by a tension spring (34); the adjacent rocker arms (32) of the barrier (3) are connected by a connecting rod (33); an external force is applied to the connecting rod (33) to open the barrier (3).

4. The waste aluminum screening anti-clogging preheating channel as described in claim 3, characterized in that... It also includes a track (331), which is fixedly set on the outer surface of the preheating channel (1); a movable actuator (332) set on the track (331) and slidable, the movable actuator (332) including a movable platform and an actuator (334) installed on the movable platform, the actuator (334) being used to press the connecting rod (33) to open the baffle (3).

5. The waste aluminum screening anti-clogging preheating channel as described in claim 1, characterized in that... The bottom of the guide component is equipped with a rolling device, and the contact method with the waste material is rolling contact.

6. The waste aluminum screening anti-clogging preheating channel as described in claim 1, characterized in that... A sealing device is used between the inner wall of the preheating channel (1) and the baffle (3).

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