Titanium and titanium alloy scrap treatment device and treatment method

Abstract

The invention discloses a titanium and titanium alloy scrap treatment device and method. The treatment device comprises a conveying mechanism, a crushing mechanism, a discharging mechanism and a cooling mechanism. By means of the treatment device, titanium, gold and titanium alloy scraps are always in a closed environment in the crushing treatment process, and the problem that the oxygen content in scrap powder is increased due to participation of oxygen in air is completely eradicated; meanwhile, the defects that the hydrogen content is increased and the treatment cost is relatively high when a hydrogenation method is adopted for treatment at present are overcome. And through a crushing cutter structure of the crushing main machine, it can be further guaranteed that the waste chips have the small powder particle size after crushing treatment, and subsequent re-smelting, reduction of smelting energy consumption and uniformity of full mixing of the waste chips and other doped metal are facilitated. The treatment device also realizes long-time continuous operation of the treatment device through the cooling mechanism, so that the maintenance cost of the treatment device is reduced, and the treatment yield is increased at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of titanium and titanium alloy waste cutting treatment, and in particular to a titanium and titanium alloy waste cutting treatment device and treatment method. Background Art

[0002] There are various methods for recycling titanium and titanium alloy scraps, aiming to maximize resource utilization and reduce environmental pollution. There are several key indicators for the recycling of titanium alloys, such as oxygen and hydrogen impurity content and particle size. The content of oxygen and hydrogen impurities is an important indicator affecting the performance and quality of titanium and titanium alloy materials. During the recycling process, the content of these impurities needs to be strictly controlled. For example, when the waste is prepared into titanium and titanium alloy powder by hydrogenation and dehydrogenation, the surface oxide layer state and oxygen content of the powder particles can be controlled by passivation treatment, and the hydrogen content also needs to be strictly controlled. The particle size of the crushed particles during the processing process needs to be controlled within a certain range to ensure the quality and performance of the product.

[0003] Current recycling methods include the following:

[0004] Physical method: including screening, centrifugation, gravity separation, etc. These methods separate and classify waste chips by physical means, providing convenience for subsequent processing. Physical processing is relatively simple and easy, but the output is low. It is suitable for the initial processing stage. When the waste chips are further crushed, the effective crushing particle size requirements cannot be met, which affects the quality of subsequent recycling and smelting. At the same time, the processing process will also cause the increase of impurities in the waste chips (such as oxygen content when in contact with air).

[0005] Chemical method: When treating titanium and titanium alloy waste cuttings, chemical methods are often used to treat films and oxides. Specific methods include pickling and corrosion, which remove impurities and oxides on the surface of waste cuttings through chemical reactions to improve the purity and reuse value of waste cuttings. However, harmful waste liquids may be generated during the chemical treatment process, which need to be properly handled to prevent pollution. If the treated titanium alloy waste cuttings need to be further crushed, the hydrogenation method is usually used. In a heated vacuum environment, the titanium alloy absorbs hydrogen to form titanium hydride, making the titanium alloy brittle and then crushed to a suitable particle size, and then vacuumed and heated again to release hydrogen, thereby achieving the crushing of the titanium alloy. This method is not only costly, but also hydrogen, as an impurity element in titanium alloys, will cause the hydrogen content of the titanium alloy to increase after treatment.

[0006] And also include incineration method, solidification method and other treatment methods, all of which cause pollution to the environment, and the treatment process will lead to an increase in the impurity content in the titanium alloy, affecting the subsequent re-smelting quality, so that the treatment quality of the titanium alloy needs to be further improved. At the same time, the particle size of the titanium alloy cannot be further reduced, which affects the smelting effect and increases the smelting energy consumption. Summary of the invention

[0007] In view of the above-mentioned problems, the present invention aims to provide a titanium and titanium alloy waste cuttings processing device and method. Through the processing device, the titanium and titanium alloy waste cuttings are always in a closed environment during the crushing process, thereby eliminating the problem of increased oxygen content in the waste cuttings powder due to the participation of oxygen in the air; at the same time, it also solves the disadvantages of increased hydrogen content and high processing cost during the current hydrogenation treatment.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a titanium and titanium alloy waste cutting processing device, characterized in that it comprises:

[0009] The conveying mechanism is used for conveying the cleaned titanium and titanium alloy waste cuttings in a closed manner;

[0010] A crushing mechanism, which performs closed crushing of the waste chips transported without oxygen to a designed particle size;

[0011] The discharging mechanism is used to actively drive the crushed waste chips to be stored in a closed environment;

[0012] A cooling mechanism is used to cool the conveying mechanism, crushing mechanism and discharging mechanism when they are in operation;

[0013] The conveying mechanism, the crushing mechanism and the discharging mechanism form a rotary closed passage, and the closed passage is an oxygen-free environment.

[0014] Preferably, the conveying mechanism comprises a material storage barrel and a material conveying pipe connected thereto, and the waste cuttings in the material storage barrel seal the connection between the material conveying pipe and the material storage barrel.

[0015] Preferably, the crushing mechanism comprises a crushing main machine, in which a crushing cutter is arranged, and the crushing main machine is sealed and connected with the discharge end of the conveying pipe.

[0016] Preferably, the discharging mechanism comprises a discharging pipe which is sealed and connected with the crushing main machine, the other end of the discharging pipe is sealed and connected with a drop hopper, and the discharging end of the drop hopper is sealed and connected with a collection trough.

[0017] Preferably, a return pipeline is sealed and connected between the drop hopper and the joint between the feed pipe and the crushing main machine, and the return pipeline drives the waste chips in the feed pipe to be transported to the crushing main machine.

[0018] A method for treating waste cuttings of titanium and titanium alloys comprises the following steps:

[0019] S1. Expel the air from the rotary closed passage formed by the conveying mechanism, crushing mechanism and discharging mechanism, and then start the crushing host to run until it reaches a stable state;

[0020] S2, the cleaned waste chips are placed in a storage barrel and transported to the port connected to the crushing host through a sealed conveying pipe;

[0021] S3, the waste chips enter the crushing host and are crushed to a certain particle size;

[0022] S4. The discharge pipe transports the crushed waste chips to the drop hopper, and they are accumulated in the aggregate trough in a closed state.

[0023] Preferably, in step S3, negative pressure suction is performed from the discharge end of the crushing main unit through the reflux pipeline, so that the waste chips transported by the conveying pipe are dispersed into the crushing main unit, and the crushed waste chips are discharged into the discharge pipe for transportation through negative pressure suction.

[0024] The beneficial effects of the present invention are as follows: the processing device can ensure that the titanium-titanium alloy waste chips are always in a closed environment during the crushing process, eliminating the problem of the increase of oxygen content in the waste chip powder caused by the participation of oxygen in the air; at the same time, it also solves the disadvantages of the increase of hydrogen content and high processing cost during the current hydrogenation treatment. The crushing tool structure of the crushing host can further ensure that the waste chips have a smaller powder particle size after crushing, which is convenient for subsequent re-smelting, reduction of smelting energy consumption and uniformity of full mixing with other doped metals. The processing device also realizes long-term continuous operation of the processing device through a cooling mechanism, reduces the maintenance cost of the processing device, and increases the processing output. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall structural diagram of the processing device of the present invention.

[0026] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle.

[0027] Figure 3 This is a diagram of the flow path during waste cutting treatment according to the present invention (indicated by the arrows).

[0028] Figure 4 This is a diagram of the gas reflux path during waste chip processing according to the present invention (indicated by the arrow).

[0029] Figure 5 This is a diagram showing the internal structure of the crushing host of the present invention.

[0030] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B.

[0031] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point C in the middle.

[0032] Figure 8 The movable blade of the present invention is provided with an inclined surface.

[0033] Fig. 9This is a diagram showing the contact between the scrap cuttings along the inclined surface and the crushing teeth of the moving blade of the present invention.

[0034] Fig.10 This is a diagram showing the arrangement of a crushing tip on an inclined plane and the crushing of waste chips.

[0035] Fig.11 It is a diagram showing the internal structure of the cooling jacket of the present invention.

[0036] Fig.12 This is a physical illustration of the material storage barrel and the main machine of the present invention.

[0037] Fig.13 It is a physical illustration of the drop hopper and the return pipeline of the present invention.

[0038] In the figure: 1-storage barrel; 1a-exhaust hole; 2-feeding pipe; 3-crushing main machine; 4-stationary blade; 41-crushing tooth; 5-moving blade; 5a-inclined surface; 51-crushing tip; 6-argon gas inlet; 7-discharge pipe; 8-feeding hopper; 9-collecting trough; 10-air shut-off device; 10a-observation window; 11-return pipe; 12-air blower; 13-oxygen sensor; 14-cold water jacket; 15-spiral blade; 16-waste cuttings. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] See attached Figures 1 to 13 A titanium and titanium alloy waste cutting processing device is shown, comprising:

[0041] The conveying mechanism is used to convey the cleaned titanium and titanium alloy waste cuttings 16 in a closed manner. Figure 1 As shown, it includes a storage barrel 1 and a conveying pipe 2 connected thereto, and the waste shavings 16 in the storage barrel 1 seal the connection between the conveying pipe 2 and the storage barrel 1. The conveying pipe 2 is preferably a spiral conveying structure, and the conveying pipe 2 is arranged at an angle, and is connected to the lower end of the storage barrel 1 at the bottom side. The waste shavings 16 contained in the storage barrel 1 always seal the connection between the discharge port of the storage barrel 1 and the conveying pipe 2, so that the conveying pipe 2 is in a closed environment during the conveying process. An exhaust hole 1a is also provided at the top of the storage barrel 1. Before the waste shavings 16 are stored, an inert gas (such as argon) can be introduced into the storage barrel 1 and the conveying pipe 2 to discharge the air (oxygen) in the inner cavity of the two, so that the waste is transported and processed in an oxygen-free environment, eliminating the participation of oxygen, and solving the problem of the increase in the oxygen (impurity) content in the titanium and titanium alloy waste shavings 16.

[0042] The crushing mechanism is used to crush the waste chips 16 transported without oxygen into a closed state to a designed particle size. Figure 5-6As shown, it includes a crushing main machine 3, in which a crushing tool is arranged, and the crushing main machine 3 is closed and connected with the discharge end of the conveying pipe 2. The waste chips 16 are transported to the crushing main machine 3 in the closed conveying pipe for crushing. In order to achieve an effective crushing operation, as shown in FIG. Figure 6 As shown, the crushing tool in the crushing host 3 includes a stationary blade 4 arranged on the inner cavity wall and a movable blade 5 rotatably arranged in the inner cavity. The number of the stationary blades 4 and the movable blades 5 is preferably twice the number, such as 412 stationary blades and 24 movable blades 5.

[0043] In order to effectively crush the waste chips 16, Figure 7 As shown, each moving blade 5 is provided with crushing teeth 41 at intervals. When the moving blade 5 rotates to drive the waste chips 16, the waste chips 16 are located between the crushing teeth 41 of the moving blade 5 and the stationary blade 4, and the waste chips 16 can be effectively and quickly mechanically crushed. Figure 7 The state shown, and the designed particle size is reached, as well as the crushing efficiency is improved.

[0044] In order to realize continuous crushing operation and continuously output the crushed waste chips 16, Figure 6 As shown, preferably, the stationary blade 4 is set to an inclined structure (the inclination angle is preferably 11-15°, such as a spiral blade 15 structure), and the crushed waste chips 16 can be continuously output under the rotation drive of the movable blade 5. If the movable blade 5 is set to an inclined structure, the output rate of the waste chips 16 will be accelerated under its rotation drive, resulting in a shorter effective crushing time of the waste chips 16 in the inner cavity of the crushing host 3, and the effective crushing particle size cannot be achieved.

[0045] In the above crushing process, the waste chips 16 can only be mechanically crushed when they are in the gap between the moving blade 5 and the stationary blade 4. However, when the moving blade 5 drives the waste chips 16 to rotate, most of the waste chips 16 are in the cavity of the crushing main machine 3, so that the waste chips 16 cannot be effectively crushed. Therefore, in order to solve this problem, Figure 8-9 As shown, a slope 5a is provided at the top of the moving blade 5 and on the rotating side. During the rotation of the waste chips 16, the waste chips 16, under the action of centrifugal force, will be embedded in the slope 5a when reaching the top of the moving blade 5. Figure 8-9 The waste chips 16 are driven toward the static blade 4 and contact the static blade 4, thereby effectively crushing the waste chips 16 and improving the crushing efficiency. At the same time, in order to facilitate the waste chips 16 to slide to the inclined surface 5a on the side wall of the dynamic blade 5 under the action of centrifugal force, each dynamic blade 5 is preferably arranged at an angle, so that the waste chips 16 can slide along the side wall of the dynamic blade 5 to the inclined surface 5a under the action of centrifugal force and contact the crushing teeth 41 of the static blade 4.

[0046] By means of the inclined surface 5a provided at the top of the moving blade 5, the waste cuttings 16 can be effectively driven toward the moving blade 5 and contact the moving blade 5, thereby further reducing the gap between the moving blade 5 and the stationary blade 4 ( Fig. 9 The broken particle size of the waste chips 16 can be further reduced.

[0047] When the moving blade 5 rotates and is misaligned with the stationary blade 4, the waste chips 16 cannot be effectively crushed. Therefore, the waste chips 16 can be effectively crushed during the short contact time between the moving blade 5 and the stationary blade 4. Fig.10 As shown, preferably, crushing tips 51 are evenly distributed on the inclined surface 5a. When the waste chips 16 are on the inclined surface 5a and under the reverse extrusion action of the crushing teeth 41, the waste chips 16 can be rolled into and crushed through the contact between the crushing teeth 41 and the waste chips 16, thereby further improving the crushing effect and crushing efficiency of the waste chips 16.

[0048] After the above-mentioned effective crushing of the waste is achieved, the present application also provides a discharging mechanism, which is used to actively drive the crushed waste chips 16 to be stored in a closed environment. The specific structure is as follows Figure 1 As shown, it includes a discharge pipe 7 which is sealed and connected with the crushing main machine 3, and a drop hopper 8 is sealed and connected at the other end of the discharge pipe 7, and a collection tank 9 is sealed and connected at the discharge end of the drop hopper 8. The crushed waste chips 16 are transported to the drop hopper 8 through the discharge pipe 7, and then fall into the collection tank 9 to be collected. Among them, the drop pipe is a conical structure, so that the material forms a spiral downward state therein, and the collection tank 9 is filled with a closed water body, and the drop hopper 8 extends into the water body to achieve blocking, and the waste chips 16 are deposited in the water body of the collection tank 9 in a closed state. The whole processing process of the waste chips 16 is closed by the water body and the water body falling in the storage barrel 1. The waste chips 16 enter the discharge pipe and move downward along the inner wall of the discharge pipe. Under the closed effect of the water body, the waste chips 16 move downward and generate pressure. The pressure acts in the discharge pipe 7 in the opposite direction and simultaneously acts on the discharge port of the crushing host 3, limiting the rapid discharge of the crushed waste chips 16, ensuring the effective crushing time of the waste chips 16 in the crushing host 3, and achieving a certain crushing particle size.

[0049] In order to avoid the problem that the waste chips 16 are blocked and cannot rotate to generate reverse pressure due to untimely processing of the drop hopper 8, as Figure 1 As shown, a drop hopper 8 is connected in parallel to one side of the drop hopper 8, so that when a single drop hopper 8 fails to process the material in time, another drop hopper 8 can be used to separate the materials. Figure 1As shown, preferably, a blower 10 is also provided on the drop hopper 8, which has an observation window 10a for real-time observation of the drop conditions in the parallel drop hopper 8, so as to judge whether the drop conditions in the main drop hopper 8 meet the needs of timely drop, and adjust the delivery rate of the delivery pipe 2 in a targeted manner to ensure the smooth operation of the entire device.

[0050] When the waste chips 16 are processed as described above, since they are in a closed environment, in order to realize the reflux effect of the entire processing system, Figure 1 As shown, a return line 11 is closed and connected between the drop hopper 8 and the joint of the conveying pipe 2 and the crushing main machine 3, and the return line 11 drives the waste chips 16 in the conveying pipe 2 to be transported to the crushing main machine 3. Among them, a blower 12 is arranged on the return line 11, which drives the air volume to enter from the joint of the conveying pipe 2 and the crushing main machine 3, and drives the material transported by the conveying pipe to passively enter the crushing main machine 3, and the discharge end of the crushing main machine 3 is exhausted by the blower 12, thereby forming a negative pressure, and the crushed waste chips 16 are stably extracted from the crushing main machine 3 into the drop hopper 8 and rotated and dropped. Through the sealing effect of the water body, the pressure and rate of material transportation are guaranteed, so that the waste chips 16 in the crushing main machine 3 can reach a certain crushing time.

[0051] According to the above closed path including the reflux pipeline 11, the argon inlet 6 is arranged at the junction of the feed pipe 2 and the crushing main unit 3. After the argon is introduced, one path of argon can enter the feed pipe 2 and reversely enter the storage barrel 1, and discharge the air in the storage barrel 1 from the exhaust hole 1a, while the other path enters the crushing main unit 3, enters the drop hopper 8 from the discharge pipe 7, and reversely enters the feed pipe 2 and the storage barrel 1 through the reflux pipe to be discharged. An oxygen sensor 13 is arranged on the reflux pipe. After the entire processing device runs for a period of time and detects that the oxygen content in the entire reflux pipeline 11 reaches the standard through the oxygen sensor 13, the raw materials are placed in the storage barrel 1 to start the entire crushing and discharging process.

[0052] The conveying mechanism, crushing mechanism and discharging mechanism constitute a rotary closed passage, and the closed passage is an oxygen-free environment, so that the processing device is operated in a closed environment, and heat is generated between various devices during continuous operation, which leads to the problem of failure of the seal at the joint of the components, thereby affecting the closed environment during the waste cutting 16 processing process. Therefore, in order to solve this problem, the present application is also provided with a cooling mechanism, which is used to cool the conveying mechanism, crushing mechanism and discharging mechanism in the operating state. The specific structure is as follows Figure 1As shown, a cold water jacket 14 (i.e., a sleeve covering the pipe body) is provided on the pipe connecting the feed pipe 2 and the crushing host 3, the outside of the crushing host 3, the discharge pipe 7, the drop hopper 8, and the return pipe, and each cold water jacket 14 is provided with a water inlet and a drain outlet for achieving cooling during the entire operation of the processing device, thereby ensuring long-term operation.

[0053] When the water body is cooling, it will be subjected to the heat conduction generated by the various components of the device, causing the cooling water to heat up. After the water body heats up, the part close to the inner wall of the delivery pipe heats up faster, while the water body in the part of the original delivery pipe and close to the cold water jacket 14 is less heated, resulting in insufficient cooling effect of the cooling water on the device components. Therefore, in order to solve this problem, Fig.11 As shown, each cooling water jacket 14 is provided with a spiral blade 15 on its inner wall. When cooling water flows through, the spiral blade 15 causes the cooling water to form a swirling state ( Fig.11 As shown by the arrow in the middle, the water in the cooling water jacket 14 is mixed with each other to achieve a uniform heating effect, thereby improving the cooling effect on the device and extending the operating time of the device.

[0054] According to the above processing device, the present application also provides a method for processing titanium and titanium alloy waste cuttings 16, which specifically includes the following steps:

[0055] S1. First, start the device, including the feed pipe 2, crushing host 3, return pipe 11 and cold water jacket 14, and run them idle for a certain period of time. At the same time, argon gas is introduced through the argon inlet 6 to exhaust the air in the whole device, and the oxygen content in the return pipe 11 is detected by the oxygen sensor 13.

[0056] S2. When the oxygen content reaches the standard, the cleaned waste chips 16 are placed in the storage barrel 1 and transported to the port connected to the crushing host 3 through the closed conveying pipe 2.

[0057] S3, the waste chips 16 are blown through the reflux pipe at one end of the feed port of the crushing main unit 3 and sucked through the negative pressure of the discharge pipe 7, so that the waste chips 16 enter the crushing main unit 3 and are crushed to a certain particle size by the crushing tool.

[0058] S4. Under the negative pressure absorption in the discharge pipe 7, the discharge pipe 7 transports the crushed waste chips 16 to the drop hopper 8. The waste chips 16 spirally fall in the drop hopper 8 under the action of the reflux pressure and generate pressure. Under the closed action of the water body in the collection tank 9, the waste chips react in the discharge pipe 7, and the discharge pressure is constant. The materials in the drop hopper 8 accumulate in the collection tank 9 in a closed state. The reflux gas enters the parallel drop hopper 8 through the top of the drop hopper 8, and enters the reflux pipeline 11 from the drop hopper 8, and realizes reflux through the blower 12.

[0059] When a single dropping hopper 8 fails to drop materials in time, the material division and dropping operations are realized through the parallel dropping hoppers 8.

[0060] The principle of the present invention is: when the processing device disclosed in the present application is used to process the waste cuttings 16 of titanium and titanium alloys, the device is first started, including the feed pipe 2, the crushing main machine 3, the return pipe 11 and the cold water jacket 14, etc., which are run idly for a certain period of time, and argon is introduced through the argon inlet 6 to discharge the air in the entire device, and the oxygen content in the return pipe 11 is detected by the oxygen sensor 13. When the oxygen content reaches the standard, the cleaned waste cuttings 16 are placed in the storage barrel 1 and sealed and transported to the port connected to the crushing main machine 3 through the feed pipe 2. The waste cuttings 16 are blown at one end of the feed inlet of the crushing main machine 3 by the return pipe, and sucked by the negative pressure of the discharge pipe 7, so that the waste cuttings 16 enter the crushing main machine 3 and are crushed to a certain particle size by the crushing tool. Under the negative pressure absorption in the discharge pipe 7, the discharge pipe 7 conveys the crushed waste chips 16 to the hopper 8. The waste chips 16 spirally fall in the hopper 8 under the action of the reflux pressure and generate pressure. Under the closed action of the water body in the collection tank 9, the waste chips react in the discharge pipe 7, and the discharge pressure is constant. The materials in the hopper 8 accumulate in the collection tank 9 in a closed state. The reflux gas enters the parallel hopper 8 through the top of the hopper 8, and enters the reflux pipeline 11 from the hopper 8, and realizes reflux through the blower 12.

[0061] The above shows and describes the basic principle, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention claimed.

Claims

1. A titanium and titanium alloy waste cutting processing device, characterized in that: include: The conveying mechanism is used for conveying the cleaned titanium and titanium alloy waste cuttings in a closed manner; A crushing mechanism, which performs closed crushing of the waste chips transported without oxygen to a designed particle size; The discharging mechanism is used to actively drive the crushed waste chips to be stored in a closed environment; A cooling mechanism is used to cool the conveying mechanism, crushing mechanism and discharging mechanism in operation; The conveying mechanism, the crushing mechanism and the discharging mechanism form a rotary closed passage, and the closed passage is an oxygen-free environment.

2. The processing device according to claim 1, characterized in that: The conveying mechanism comprises a material storage barrel and a material conveying pipe connected thereto, and the waste cuttings in the material storage barrel seal the connection between the material conveying pipe and the material storage barrel.

3. The processing device according to claim 2, characterized in that: The crushing mechanism comprises a crushing main machine, in which a crushing cutter is arranged, and the crushing main machine is sealed and connected with the discharge end of the conveying pipe.

4. The processing device according to claim 3, characterized in that: The discharging mechanism comprises a discharging pipe which is closed and connected with the crushing main machine, the other end of the discharging pipe is closed and connected with a dropping hopper, and the discharging end of the dropping hopper is closed and connected with a collecting trough.

5. The processing device according to claim 4, characterized in that: A return pipeline is sealed and connected between the drop hopper, the material delivery pipe and the crushing main machine, and the return pipeline drives the waste chips in the material delivery pipe to be transported to the crushing main machine.

6. A method for treating waste cuttings of titanium and titanium alloys, characterized in that: The following steps are involved: S1. Expel the air from the rotary closed passage formed by the conveying mechanism, crushing mechanism and discharging mechanism, and then start the crushing host to run until it reaches a stable state; S2, the cleaned waste chips are placed in a storage barrel and transported to the port connected to the crushing host through a sealed conveying pipe; S3, the waste chips enter the crushing host and are crushed to a certain particle size; S4. The discharge pipe transports the crushed waste chips to the drop hopper, and they are accumulated in the aggregate trough in a closed state.

7. The processing method according to claim 6, characterized in that: In step S3, negative pressure suction is performed from the discharge end of the crushing main unit through the reflux pipeline, so that the waste chips transported by the conveying pipe are dispersed into the crushing main unit, and the crushed waste chips are discharged into the discharge pipe for transportation through negative pressure suction.

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