An apparatus and process for recycling aluminium

Abstract

This invention relates to the field of metal smelting, and more particularly to an apparatus and process for recovering aluminum. The process for recovering aluminum includes the following steps: classifying raw materials into forged aluminum parts and cast aluminum parts based on their overall color, cross-sectional color, cross-sectional texture, and cross-sectional layering. When observing the overall color and cross-sectional color, bright white materials are likely forged aluminum parts; dark gray materials are likely cast aluminum parts. When observing the cross-sectional texture and layering, materials with no obvious particles and no layering are likely forged aluminum parts; materials with obvious particles and layering are likely cast aluminum parts. At least two conditions must be met to classify a material as cast aluminum parts; otherwise, it is classified as forged aluminum parts. During the classification of forged and cast aluminum parts, impurities in the raw materials are removed. This invention has the advantage of being able to use raw materials similar to aluminum ingots for production, thus reducing the production cost of aluminum ingots.

Description

Technical Field

[0001] This invention relates to the field of metal smelting, and more particularly to an apparatus and process for recovering aluminum. Background Technology

[0002] Recycled aluminum, also known as recycled aluminum, is an aluminum alloy or aluminum metal obtained by remelting and refining scrap aluminum and aluminum alloy materials or aluminum-containing waste. It is an important source of metallic aluminum. Recycled aluminum mainly appears in the form of aluminum alloys.

[0003] Currently, there are generally two methods for producing recycled aluminum: one is to perform preliminary sorting and preheating of the raw materials, and then send the raw materials into different furnaces for smelting, and finally produce aluminum ingots; the other is to directly send the raw materials into the furnace for smelting after preliminary sorting, and control the feeding of raw materials through the well logging and feeding device built into the furnace, and finally produce aluminum ingots.

[0004] In the aforementioned aluminum recycling process, the initial sorting of raw materials is mainly based on the volume and density of the raw material particles. The different raw materials, after screening, are then fed into the furnace for smelting in a specific order. In other words, the only difference between the different types of raw materials is the order in which they are fed into the furnace. Finally, through conversion and processing in different furnaces to remove impurities, uniformly standardized aluminum ingots are obtained.

[0005] Because the raw materials come from various industries with vastly different requirements for aluminum, the raw materials often contain numerous impurities and have complex compositions. Furthermore, different industries have strict requirements regarding the types and amounts of impurities in recycled aluminum. Additionally, the aluminum grain size varies in different raw materials, necessitating multiple tests and impurity removal processes during the aluminum recycling production process, resulting in higher production costs. Summary of the Invention

[0006] In order to reduce the impurity removal process in the aluminum recycling production process and reduce the production cost of aluminum ingots, the present invention provides an apparatus and process for aluminum recycling.

[0007] This invention provides a process for recycling aluminum, employing the following technical solution:

[0008] A process for recycling aluminum includes the following steps:

[0009] Based on the overall color, cross-sectional color, cross-sectional texture, and cross-sectional layering of the raw materials, the raw materials are classified into forged aluminum parts and cast aluminum parts.

[0010] When observing the overall color, a bright white color may indicate a forged aluminum part, while a dark gray color may indicate a cast aluminum part. When observing the cross-sectional color, a bright white cross-section may indicate a forged aluminum part, while a dark gray cross-section may indicate a cast aluminum part.

[0011] When observing the cross-sectional texture, if the cross-section has no obvious particles, it may be a forged aluminum part; if the cross-section has obvious particles, it may be a cast aluminum part.

[0012] When observing the delamination of the cross-section, if the cross-section shows delamination, it may be a forged aluminum part; if the cross-section does not show delamination, it may be a cast aluminum part.

[0013] When classifying raw materials, at least two conditions must be met to be identified as cast aluminum parts; otherwise, they must be identified as forged aluminum parts.

[0014] When identifying forged and cast aluminum parts, impurities in the raw materials are removed.

[0015] In one specific feasible implementation, before classifying the raw materials, the raw materials are initially sorted to remove the cast aluminum parts that can be directly identified from the raw materials.

[0016] In one specific feasible implementation, after sorting out the cast aluminum parts, pure aluminum is first melted, and then the sorted cast aluminum parts are added to the pure aluminum to melt the cast aluminum parts to obtain molten aluminum, and then the molten aluminum is blended.

[0017] In one specific feasible implementation, pure aluminum is first melted, accounting for 15-20% of the total furnace capacity, and cast aluminum parts are melted, accounting for 50-60% of the total furnace capacity. Then, pure aluminum is added to the remaining space in the furnace.

[0018] In one specific feasible implementation, after the recycled aluminum is melted, the copper and iron content in the aluminum liquid is tested. If the copper and iron content is less than the preset threshold, 10-15% of the total amount of recycled aluminum in the furnace is added, and then pure aluminum is added to the remaining space in the furnace.

[0019] If the copper and iron content is greater than or equal to the threshold, pure aluminum is added to the remaining space in the furnace to adjust the copper and iron content to be less than the threshold.

[0020] In one specific feasible implementation, after the cast aluminum parts are sorted out, the aluminum parts are melted and forged to obtain molten aluminum. The content of intermediate alloy in the molten aluminum is tested, and pure aluminum and alloy are added for blending until the requirements of aluminum ingots are met.

[0021] In one specific feasible implementation, before the forged aluminum part is melted, the content of the intermediate alloy in the raw material is tested, the test results are recorded, the test results are compared with the requirements of the aluminum ingot and the deviation value is calculated. If the deviation value is greater than or equal to 0.5%, the raw material is rejected.

[0022] This invention provides an apparatus for recycling aluminum, employing the following technical solution:

[0023] An apparatus for recycling aluminum includes a frame, a crushing assembly on the frame, a discharge assembly at the outlet end of the crushing assembly, a first conveyor belt at the outlet end of the discharge assembly, an alloy analysis element on the first conveyor belt, a sorting mechanism at the end of the first conveyor belt, and a conveying assembly at the end of the first conveyor belt, the sorting mechanism being positioned above the conveying assembly.

[0024] The sorting mechanism includes a rotating component and a translating component. The rotating component includes a mounting plate and a second drive motor. The second drive motor is mounted on the frame, and the mounting plate is connected to the output shaft of the second drive motor. The translating component is mounted on the mounting plate.

[0025] In one specific implementation, the translation component includes a lead screw and a slider, the lead screw is disposed on the mounting plate, the slider is threadedly connected to the lead screw, and a third drive motor for driving the lead screw to rotate is provided at one end of the mounting plate;

[0026] The first conveyor belt has a fixing plate at its end. The fixing plate has multiple placement rods on the side facing the slider. The multiple placement rods are arranged at intervals, and the gap between adjacent placement rods is smaller than the particle size of the raw material. The slider has multiple fixing rods on the side facing the placement rods. The multiple fixing rods are arranged at intervals, and the fixing rods are staggered with the placement rods. The gap between the fixing rods is smaller than the particle size of the raw material.

[0027] In one specific implementation, the first conveyor belt is provided with a fixed pipe, and a plurality of air nozzles are connected to the fixed pipe, with the air nozzles facing the end of the first conveyor belt.

[0028] In summary, the present invention has at least one of the following beneficial technical effects:

[0029] 1. By analyzing the color and cross-sectional structure of the raw materials, it can be determined whether the raw materials are forged aluminum parts or cast aluminum parts. This makes it easier to control the mixing ratio of forged aluminum parts and cast aluminum parts during production, reducing the need for impurity removal and proportioning treatment of molten metal, and lowering production costs.

[0030] 2. After determining the content of intermediate alloy in the raw materials, raw materials with similar intermediate alloy content can be selected for aluminum recycling, thereby further reducing the proportion of molten metal and lowering production costs.

[0031] 3. Evaluate raw materials from multiple aspects such as color, cross-sectional structure, cross-sectional color, and cross-sectional layering to improve the accuracy of raw material classification.

[0032] 4. The raw materials are spaced apart on the first conveyor belt, facilitating accurate rejection by the sorting mechanism. The slider slides along the axis of the lead screw, driving the fixed rod to move. The fixed rod extracts raw materials that do not meet production requirements from multiple pieces of material, thus enabling accurate sorting of the raw materials conveyed by the first conveyor belt. Attached Figure Description

[0033] Figure 1 Flowchart of the process used for aluminum recycling.

[0034] Figure 2 This is a schematic diagram of the overall structure of a device used for aluminum recycling.

[0035] Figure 3 This is a structural diagram of the material feeding assembly.

[0036] Figure 4 This is a schematic diagram of the first conveyor belt.

[0037] Figure 5 This is a schematic diagram of the sorting mechanism.

[0038] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Crushing assembly; 21. Chassis; 22. Crushing roller; 23. First drive motor; 3. Feeding assembly; 31. Collection box; 32. Discharge pipe; 4. First conveyor belt; 5. Sorting mechanism; 51. Translation assembly; 511. Lead screw; 512. Slider; 513. Third drive motor; 52. Rotation assembly; 521. Mounting plate; 522. Second drive motor; 6. Conveying assembly; 61. Second conveyor belt; 62. Third conveyor belt; 7. Alloy analyzer; 8. Fixed pipe; 9. Air nozzle; 10. Fixed plate; 11. Placement rod; 12. Fixed rod; 13. Stop bar; 14. Slide chute; 15. Guide plate; 16. Clearance groove; 17. Feed hopper; 18. Vibrating motor. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0040] Reference Figure 1 This invention discloses a process for recycling aluminum, comprising the following steps:

[0041] S100, initial sorting of raw materials.

[0042] Many manufacturers mark aluminum parts with batch numbers, serial numbers, and other markings to indicate the manufacturing process and aluminum content. These markings are usually retained on the aluminum parts after they are discarded and used as raw materials for recycled aluminum. By observing these markings, aluminum parts can be initially sorted, and cast aluminum parts that can be directly sorted by observing the markings can be removed from the raw materials.

[0043] In some other embodiments, the raw materials can be further subdivided according to their type and aluminum content. For example, window frames with 80% aluminum content, window frames with 90% aluminum content, and automotive parts with 90% aluminum content. First, the raw materials are divided into one group (window frames) and one group (automotive parts) based on their type. Then, the raw materials in the window frame group are further subdivided according to their aluminum content, into a window frame group with 80% aluminum content and a window frame group with 90% aluminum content. This ensures that the grouped raw materials closely approximate or meet the requirements of aluminum ingot products.

[0044] S200, a classification of forged aluminum parts and cast aluminum parts.

[0045] Based on the overall color, cross-sectional color, cross-sectional texture, and cross-sectional layering of the raw materials, the raw materials are classified into forged aluminum parts and cast aluminum parts. The specific criteria for this classification are as follows:

[0046] When observing the overall color, a bright white color may indicate a forged aluminum part, while a dark gray color may indicate a cast aluminum part.

[0047] When observing the cross-sectional color, a bright white cross-section may indicate a forged aluminum part, while a dark gray cross-section may indicate a cast aluminum part.

[0048] When observing the texture of the cross-section, if there are no obvious particles, it may be a forged aluminum part; if there are obvious particles, it may be a cast aluminum part. "Obvious" means that it can be clearly identified with the naked eye, and "obvious particles" means that the texture on the cross-section can be clearly seen with the naked eye.

[0049] When observing the delamination of the cross-section, if delamination is present, it may be a forged aluminum part; if delamination is not present, it may be a cast aluminum part.

[0050] When classifying raw materials, at least two of the above conditions must be met to classify them as cast aluminum parts; otherwise, they are classified as forged aluminum parts. For example, when classifying a piece of raw material, it is necessary to first observe the overall color. If the overall color of the raw material is bright white, then further observe the cross-section. If the cross-section is dark gray and has obvious particles or no layering, it indicates that it is a cast aluminum part. Conversely, if the overall color of the raw material is bright white, and the cross-section is also bright white and smooth with no obvious particles or layering, it indicates that the raw material is a forged aluminum part.

[0051] During the sorting process of forged and cast aluminum parts, impurities mixed in with the raw materials are also screened out. These impurities include coated aluminum parts, rubber, copper products, and iron products, which can contaminate the subsequent molten aluminum.

[0052] There are significant differences in the content of some intermediate alloys between forged aluminum parts and cast aluminum parts, such as silicon, iron, copper, and magnesium. In some other embodiments, an alloy analyzer can be used to analyze the alloy composition in each raw material and detect the content of each intermediate alloy. By analyzing and detecting the content of intermediate alloys in the raw materials, forged aluminum parts and cast aluminum parts in the raw materials can be screened.

[0053] Furthermore, the analysis results of an alloy analyzer can be used to compare the content of the intermediate alloy in the forged aluminum part with the requirements of the aluminum ingot to be cast. If the deviation exceeds 0.2%, the raw material needs to be removed from the forged aluminum part and used for the production of other aluminum ingots. For ease of understanding, examples are given using raw material A with a silicon content of 0.6% and raw material B with a silicon content of 0.8%.

[0054] If the requirement for aluminum ingots is a silicon content of 0.4%-0.5%, and raw material A has a silicon content that deviates from the requirement by 0.1%, it can be used for aluminum ingot production. However, raw material B has a silicon content that deviates from the requirement by 0.3%, so raw material B needs to be discarded and used for the production of other aluminum ingots.

[0055] S300, raw material melting.

[0056] The sorted raw materials are sent to the corresponding furnace for melting and aluminum liquid preparation. Since the requirements of aluminum ingots for cast aluminum parts and forged aluminum parts are different, the melting process is also different.

[0057] When melting aluminum castings, pure aluminum is first melted in the furnace, filling 15-20% of the furnace volume. Then, the aluminum castings are added, filling 50-60% of the furnace volume. Simultaneously, the total volume of the melted pure aluminum and castings is controlled to be 70-75%. At this point, the composition of the molten aluminum is analyzed to determine the copper and iron content. This content is compared to preset thresholds. If the copper and iron content is less than the threshold, the molten aluminum meets the requirements for aluminum ingots. If the copper and iron content is greater than or equal to the threshold, pure aluminum is added to the furnace to adjust the filtrate, ensuring it meets the requirements for aluminum ingots.

[0058] For molten aluminum that meets the requirements for aluminum ingots in terms of composition, cast aluminum parts accounting for 12-15% of the furnace volume are added to the furnace. The copper and iron content of the molten aluminum is then tested. If it meets the requirements for aluminum ingots, pure aluminum is added to complete the preparation of the filtrate. If it does not meet the requirements, pure aluminum is added to adjust it until it meets the requirements.

[0059] When melting forged aluminum parts, forged aluminum parts are put into the furnace. After all the forged aluminum parts have been melted into molten aluminum, the content of intermediate alloy in the molten aluminum is tested. Intermediate alloy is added to adjust the molten aluminum so that the content of intermediate alloy in the molten aluminum meets the requirements of aluminum ingots.

[0060] S400 is used to make aluminum ingots.

[0061] The molten aluminum is fed into a mold to form aluminum ingots.

[0062] Reference Figure 2 The present invention also discloses an apparatus for recycling aluminum, comprising a frame 1, on which a crushing assembly 2 is mounted. The crushing assembly 2 includes a housing 21 and crushing rollers 22. The housing 21 is fixed to the frame 1, and a feed hopper 17 is fixed to the top of the housing 21. There are two crushing rollers 22, which are arranged parallel to each other in the housing 21, and their shafts are connected to each other by gears. A first drive motor 23 is fixed to the outer wall of the housing 21, and the output shaft of the first drive motor 23 is coaxially and fixedly connected to the shaft of one of the crushing rollers 22. The operation of the first drive motor 23 drives the crushing rollers 22 to rotate, thereby crushing the raw material fed into the housing 21 into particles of a specified size.

[0063] Reference Figure 2 and Figure 3 The bottom of the casing 21 is equipped with a material discharge assembly 3, and the bottom of the material discharge assembly 3 is equipped with a first conveyor belt 4. After being crushed, the raw materials are dispersed onto the first conveyor belt 4 after passing through the material discharge assembly 3, and the first conveyor belt 4 continues to transport the raw materials. The material discharge assembly 3 includes a collection box 31 with an inlet and multiple discharge pipes 32. The collection box 31 is fixed to the side wall of the frame 1, and the inlet of the collection box 31 faces the outlet of the casing 21. The multiple discharge pipes 32 are connected to the bottom surface of the collection box 31, and there are gaps between the multiple discharge pipes 32. There is a gap at the end of the adjacent discharge pipes 32 away from the collection box 31. A vibration motor 18 is fixed on the outer wall of the collection box 31. After the raw materials fall from the casing 21 into the collection box 31, the vibration motor vibrates and transports the raw materials, so that the raw materials are transported to the first conveyor belt 4 through the discharge pipes 32. The discharge pipes 32 guide the raw materials onto the first conveyor belt 4 and maintain a certain distance between the raw material particles.

[0064] Reference Figure 2 and Figure 4A sorting mechanism 5 is mounted on the frame 1, and a conveying assembly 6 is located below the first conveyor belt 4. The conveying assembly 6 includes a second conveyor belt 61 and a third conveyor belt 62. The second conveyor belt 61 is positioned between the first conveyor belt 4 and the sorting mechanism 5, and the third conveyor belt 62 is positioned on the side of the sorting mechanism 5 away from the first conveyor belt 4. An alloy analysis element, specifically an alloy analyzer 7, is installed on the first conveyor belt 4. The alloy analyzer 7 performs composition analysis on the raw materials on the first conveyor belt 4 to determine whether the raw materials are forged aluminum parts. If the raw materials on the first conveyor belt 4 are forged aluminum parts, the raw materials are marked, and the sorting mechanism 5 transfers the raw materials to the third conveyor belt 62. The remaining raw materials are conveyed to the second conveyor belt 61. The second conveyor belt 61 and the third conveyor belt 62 then transport the raw materials to subsequent processes.

[0065] Reference Figure 2 and Figure 4 A fixing plate 10 is fixed to the end of the first conveyor belt 4. The top surface of the fixing plate 10 is flush with the top surface of the conveyor belt. Multiple placement rods 11 are fixed to the side of the fixing plate 10 facing the sorting mechanism 5. The multiple placement rods 11 are arranged along the width direction of the conveyor belt, and the interval between the placement rods 11 is smaller than the particle size of the raw material, that is, the raw material will not fall from the gap between the placement rods 11. Under the conveying action and inertia of the first conveyor belt 4, the raw material moves to the fixing plate 10 or the placement rods 11, which facilitates the sorting mechanism 5 to sort it. A fixing pipe 8 is fixed to the top of the first conveyor belt 4. Multiple air nozzles 9 are connected to the side wall of the fixing pipe 8. The air nozzles 9 are set facing the second conveyor belt 61. The air nozzles 9 are set one-to-one with the air outlet pipes on the collection box 31, so that the airflow blown by the air nozzles 9 can accurately blow the raw material, and blow the raw material to the second conveyor belt 61 through the airflow, thus conveying the raw material.

[0066] Reference Figure 5 The sorting mechanism 5 includes a rotating component 52 and a translating component 51. The rotating component 52 includes a mounting plate 521 and a second drive motor 522. The second drive motor 522 is fixed to the side wall of the frame 1, and the mounting plate 521 is fixed to the output shaft of the second drive motor 522. The translating component 51 is mounted on the mounting plate 521. The operation of the second drive motor 522 can drive the mounting plate 521 and the translating component 51 to rotate together.

[0067] Reference Figure 5The translation component 51 includes a lead screw 511 and a slider 512. The lead screw 511 is mounted on a mounting plate 521, and its axis is set along the width direction of the first conveyor belt 4. The slider 512 is threadedly connected to the lead screw 511, with one side of the slider 512 in contact with the side wall of the mounting plate 521, allowing it to slide relative to the mounting plate 521. A third drive motor 513 is fixed to the end of the mounting plate 521 away from the second drive motor 522. The output shaft of the third drive motor 513 is coaxially connected to the lead screw 511, driving the lead screw 511 to rotate. The rotation of the lead screw 511 causes the slider 512 to move along the width direction of the first conveyor belt 4.

[0068] Reference Figure 5 Multiple fixing rods 12 are fixed to the side of the slider 512 facing the first conveyor belt 4. The fixing rods 12 are spaced apart and arranged along an arc. A groove 14 is provided on the slider 512, so that the inner bottom surface of the groove 14 is flush with the top surface of the fixing rod 12. The gap between the fixing rods 12 is smaller than the particle size of the raw material, that is, the raw material will not fall between the fixing rods 12. The fixing rods 12 are staggered with the placement rods 11, and the fixing rods 12 extend into the gap between the placement rods 11, so that when the second drive motor 522 drives the fixing rods 12 to rotate, the fixing rods 12 can pass through the gap between the placement rods 11.

[0069] Normally, the fixed rod 12 is above the placement rod 11, allowing the raw material on the first conveyor belt 4 to be conveyed to the second conveyor belt 61. When raw material is detected that needs to be rejected, the third drive motor 513 operates to adjust the position of the slider 512. After the slider 512 is adjusted, the second drive motor 522 operates, causing the fixed rod 12 to rotate below the placement rod 11. When the raw material is conveyed onto the placement rod 11, the second drive motor 522 operates again, causing the fixed rod 12 to rotate upwards. The raw material is transferred from the placement rod 11 to the fixed rod 12, and as the fixed rod 12 continues to rotate, the raw material slides along the fixed rod 12 towards the slider 512 and then slides from the chute 14 towards the third conveyor belt 62. Due to the length difference between the placement rod 11 and the fixed rod 12, there is a situation where the raw material cannot be lifted by the fixed rod 12. The air nozzle 9 moves the raw material towards the end of the placement rod 11 away from the fixed plate 10, allowing the fixed rod 12 to reject the raw material. By arranging the fixing rods 12 in an arc shape, the raw material can be lifted more stably, preventing it from falling off the edges of the fixing rods 12. The inner bottom surface of the chute 14 can be set to an arc shape to facilitate the positioning and fixing of the fixing rods 12.

[0070] Reference Figure 5A stop bar 13 is fixed on the fixed rod 12. When the raw material slides onto the fixed rod 12, the stop bar 13 blocks the raw material and positions it on the placement rod 11, making it easier for the fixed rod 12 to remove the raw material. At the same time, when the removed raw material is transferred, the stop bar 13 can guide the raw material instead of the chute 14, so that the raw material moves to the third conveyor belt 62.

[0071] Reference Figure 2 A guide plate 15 is fixed on the side wall of the frame 1. The guide plate 15 is located between the sorting mechanism 5 and the third conveyor belt 62. A clearance groove 16 is provided on the guide plate 15 for the fixed rod 12 to pass through. After the raw material is removed from the first conveyor belt 4, it slides along the placement rod 11 to the guide plate 15. The guide plate 15 conveys the raw material to the third conveyor belt 62.

[0072] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An apparatus for recycling aluminum, characterized by: The utility model provides a kind of alloy sorting device, including rack, the outlet end of the crushing component is equipped with blanking component on the rack, the outlet end of the blanking component is equipped with first conveyor belt, alloy analysis element is equipped on the first conveyor belt, the end of the first conveyor belt is equipped with sorting mechanism, the end of the first conveyor belt is equipped with conveying component, and the sorting mechanism is arranged above the conveying component. The sorting mechanism includes a rotating component and a translation component, the rotating component includes a mounting plate and a second drive motor, the second drive motor is arranged on the rack, the mounting plate is connected with the output shaft of the second drive motor, and the translation component is arranged on the mounting plate. The first conveyor belt is provided with a fixed tube, and a plurality of air blowers are communicated on the fixed tube, and the air blowers are directed towards the end of the first conveyor belt. The translation component includes a lead screw and a sliding block, the lead screw is arranged on the mounting plate, the sliding block is threadedly connected to the lead screw, and one end of the mounting plate is provided with a third drive motor for driving the lead screw to rotate. The end of the first conveyor belt is provided with a fixed plate, one side of the fixed plate facing the sliding block is provided with a plurality of storage rods, the plurality of storage rods are arranged at intervals, and the gap between adjacent storage rods is smaller than the particle size of the raw material. Under normal conditions, the fixed rod is above the storage rod, so that the raw material on the first conveyor belt can be conveyed to the second conveyor belt; when it is detected that the raw material needs to be rejected, the third drive motor operates to adjust the position of the sliding block, and after adjustment, the second drive motor operates to rotate the fixed rod below the storage rod; after the raw material is conveyed to the storage rod, the second drive motor operates again to rotate the fixed rod upward, the raw material is transferred from the storage rod to the fixed rod, and continues to rotate along the fixed rod, and the raw material slides along the fixed rod to the third conveyor belt through the sliding slot; due to the length difference between the storage rod and the fixed rod, there is a case that the raw material cannot be lifted by the fixed rod, the air blower moves the raw material away from the fixed plate to the end of the storage rod, so that the fixed rod can reject the raw material.

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