Grinding type waste residue treatment equipment and harmless treatment method

By designing abrasive waste slag treatment equipment and using an inclined grinding plate and transmission mechanism, the problems of insufficient crushing and high energy consumption in the prior art are solved, and efficient powdering and resource utilization of waste slag are achieved.

CN119406893AInactive Publication Date: 2025-02-11MAANSHAN GUOYUN CONCRETE CO LTD
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Patent Information

Application Number
CN202411525788.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-02-11
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the existing waste residue treatment technology, the crushing rollers are not crushed sufficiently, making it difficult to adapt to waste residue of different sizes. Multi-stage crushing increases the complexity of the equipment and energy consumption, making it difficult to achieve powder processing.

Method used

A grinding waste slag treatment equipment is designed, using an inclined grinding plate and a transmission mechanism. The up and down movement of the grinding plate is driven by a stepper motor, and combined with the fan to increase the internal air pressure, the effective grinding and powdering treatment of waste slags of different sizes is achieved. .

Benefits of technology

The efficiency and accuracy of waste slag treatment are improved, and the powder treatment of waste slag is realized, energy consumption is reduced, and environmental pollution is reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses grinding type waste residue treatment equipment and a harmless treatment method.The grinding type waste residue treatment equipment comprises an equipment body, a feeding bin and a collecting bin, the feeding bin is located at the top end of the equipment body, the collecting bin is located at the bottom end of the equipment body, and a right mounting support and a left mounting support are arranged at the left end and the right end in the equipment body correspondingly; and transmission mechanisms are mounted in the right mounting bracket and the left mounting bracket. According to the grinding type waste residue treatment equipment and the harmless treatment method, building waste residues of different sizes can be continuously and effectively ground through the design of the inclined grinding plate, the comprehensiveness and uniformity of waste residue treatment are ensured, the size of the waste residues is gradually reduced through continuous friction of the grinding plate, the treatment efficiency is improved, and the treatment cost is reduced. The volume pressure in the subsequent treatment process is reduced, the waste residues can be ground into fine particles, and secondary utilization of resources such as building materials or roadbed materials is facilitated, so that the utilization rate of the resources is increased.
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Description

Technical Field

[0001] The invention relates to the technical field of waste residue treatment, and in particular to a grinding type waste residue treatment device and a harmless treatment method. Background Art

[0002] Among the many waste residue treatment technologies, grinding waste residue treatment technology has attracted widespread attention because it can effectively reduce the particle size of waste residue and facilitate subsequent resource utilization and harmless treatment.

[0003] Existing waste residue treatment technology usually relies on crushing rollers to crush and recycle waste residue. This technology uses two crushing rollers to squeeze and crush the waste residue to achieve the purpose of reducing the particle size of the waste residue. However, this crushing method has certain limitations. The existing crushing roller equipment is often unable to make real-time adjustments according to the actual size of the waste residue, resulting in the inability to fully crush waste residues of different sizes. In order to solve the problem of crushing accuracy, it is usually necessary to use multiple crushing rollers with different spacings for multi-stage screening, which not only increases the complexity of the equipment, but also has high requirements on the accuracy of the guide bin. Such multi-stage crushing is also space-limited. The internal space of the guide bin is narrow and the waste residue cannot be effectively compacted, which limits the crushing efficiency of the crushing roller. In addition, the design of the multi-stage crushing roller often needs to be equipped with multiple motors, resulting in high energy consumption of the entire system. Even if multiple sets of crushing mechanisms are used, it is difficult to grind the waste residue into powder. This is a major defect for some occasions that require high-fineness waste residue.

[0004] In view of the above problems, it is necessary to develop a new type of grinding waste residue treatment equipment and a corresponding harmless treatment method to improve the efficiency and accuracy of waste residue treatment, reduce energy consumption, and at the same time realize the powder treatment of waste residue to meet the growing demand for waste residue resource utilization. The present invention is proposed to solve these problems. Summary of the invention

[0005] The object of the present invention is to provide a grinding type waste residue treatment equipment and a harmless treatment method to solve the problem in the above background technology that the crushing roller is not sufficiently crushed and is difficult to adapt to harmless treatment.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grinding type waste residue treatment equipment and a harmless treatment method, comprising an equipment body, a feed bin and a collection bin, wherein the feed bin is located at the top of the equipment body, the collection bin is located at the bottom of the equipment body, a right mounting bracket and a left mounting bracket are respectively arranged at the left and right ends of the interior of the equipment body, and a transmission mechanism is installed inside the right mounting bracket and the left mounting bracket; The transmission mechanism includes a movable groove, a stepper motor, a transmission shaft, a transmission chain, a turntable, a positioning frame, a guide plate, a transmission slide plate and a grinding plate. The movable groove is preset inside the equipment body, the stepper motor is installed inside the equipment body, the transmission shaft is movably connected to the right mounting bracket and the left mounting bracket respectively, the output end of the stepper motor and one end of the transmission shaft are respectively provided with sprockets, the connecting end of the transmission chain is respectively connected to the stepper motor and the transmission shaft, the middle end of the turntable is fixedly connected to one end of the transmission shaft, the positioning frame is fixedly arranged on the outer surface of one end of the turntable, the guide plate is located at the front end of the positioning frame, and the transmission slide plate is connected between the guide plate and the grinding plate; A concave plate is arranged at the middle end of the guide plate, a slide groove is formed between the concave plate and the guide plate, a transmission rod is movably connected inside the slide groove, one end of the transmission rod is connected to a transmission slide plate, the transmission slide plate is slidably connected to the equipment body, and a reinforcing rib plate is arranged between the transmission slide plate and the grinding plate.

[0007] As a preferred technical solution of the present invention, a flip cover is provided at the top of the feed bin, and a hinge is provided between the flip cover and the feed bin.

[0008] By adopting the above technical solution, the flip cover covers the top of the feed bin, which can suppress dust and prevent dust from rising upward during the grinding process, and the hinge facilitates the flip cover to flip open horizontally.

[0009] As a preferred technical solution of the present invention, a fan is arranged at the top of the feed bin, and the output end of the fan and the connecting ends of the two grinding plates are located on the same vertical line.

[0010] By adopting the above technical solution, the fan installed in the feed bin can increase the wind pressure inside the equipment, causing the ground waste slag particles to settle downward, which not only avoids blockage, but also reduces the particles filling between the waste slag and the grinding plate, and increases the friction between the grinding plate and the waste slag.

[0011] As a preferred technical solution of the present invention, the outer surface of one end of the grinding plate is inclined, and grinding protrusions are evenly distributed on the surface of the grinding plate, and the length of the grinding protrusions is the same as the length of the grinding plate.

[0012] By adopting the above technical solution, the grinding plate can grind construction waste of different sizes through the inclined surface, and can grind irregular waste. Through continuous grinding, its own volume is reduced and falls downward, and the gap between the two grinding plates gradually decreases from top to bottom, so that the grinding plate can continue to keep full fit with the construction waste.

[0013] As a preferred technical solution of the present invention, guide rails are symmetrically arranged inside the equipment body, and guide grooves are slidably connected to the outer surfaces of the guide rails, and the guide grooves are preset inside the grinding plate and the reinforcing rib plate.

[0014] By adopting the above technical solution, the guide rail and the guide groove are slidably matched, and the reinforcing rib plate is used to enhance the lateral pressure of the grinding plate, so as to avoid eccentric displacement of the two grinding plates caused by the grinding action.

[0015] As a preferred technical solution of the present invention, the delay difference of the stepper motors provided for the right mounting bracket and the left mounting bracket is 1S-2S.

[0016] By adopting the above technical solution, the stepping motors of the two transmission mechanisms have a certain delay, and the delay effect facilitates the two grinding plates to move vertically and staggered downward relative to each other.

[0017] As a preferred technical solution of the present invention, a slider is provided on the outer surface of one end of the guide disk, the slider is slidably matched with the turntable, and the two ends of the upper line of the turntable are slidably matched with the outer surface of one end of the guide disk.

[0018] By adopting the above technical solution, the guide plate slides along the inside of the positioning frame through a slider, and a guide structure is provided at the connecting end of the positioning frame and the guide plate, so that the guide plate can move parallel to the turntable as the center point, and the eccentric position difference generated by the movement is used to drive the transmission rod and the transmission slide to move vertically up and down.

[0019] As a preferred technical solution of the present invention, a screw handle is movably connected inside the positioning frame, and the screw handle is threadedly connected to the slider.

[0020] By adopting the above technical solution, the screw handle (19) controls the position of the guide plate (14) by means of threaded transmission.

[0021] A method for harmless treatment of grinding waste residue comprises the following steps: S1. Preprocessing steps: A. Physical grinding: Use grinding type waste residue treatment equipment to physically grind the waste residue, and the mechanical action of the grinder will break the waste residue into smaller particles for subsequent treatment; B. Chemical treatment: For waste residues containing harmful chemical components, chemical treatment methods such as neutralization, oxidation-reduction reactions can be used to reduce the content of harmful components or convert them into harmless substances; C. Particle size adjustment: Through screening or further crushing, the particle size distribution of the waste residue is adjusted to meet the requirements of subsequent separation and treatment processes; S2, separation step: A. Separation of metal and non-metal: Use magnetic separation, electric separation, flotation and other separation equipment to separate the metal and non-metal components in the pre-treated waste slag. The metal components usually have high economic value and can be recycled; B. Screening of harmful substances: Screening of harmful substances in waste residues, using special technical means, such as biological treatment, chemical precipitation, etc., to remove or reduce the concentration of harmful substances; S3. Harmless treatment steps: A. Treatment of metal waste slag: The separated metal waste slag can be recycled by smelting, electrolysis and other methods. These methods can not only reduce the volume of waste slag, but also extract metal resources; B. Non-metallic waste residue treatment: Non-metallic waste residue can be treated by solidification (such as adding a solidifying agent to turn it into a stable solid) or stable landfill. In addition, resource utilization can also be considered, such as as a building material or roadbed material; C. Treatment of Hazardous Substances: For harmful substances in waste residues, chemical stabilization, solidification or biological treatment can be used to convert them into harmless or low-harm substances; S4. Discharge or recovery steps: A. Discharge: The waste residue that has been harmlessly treated can be safely discharged if it meets the local discharge standards; B. Recycling: Waste residues with recycling value should be utilized as resources as much as possible, such as using the waste residues as raw materials or auxiliary materials for the production of other products, so as to achieve waste residue reduction, resource utilization and harmlessness.

[0022] Compared with the prior art, the grinding type waste residue treatment equipment and harmless treatment method of the present invention have the following beneficial effects: The inclined grinding plate design can continuously and effectively grind construction waste slag of different sizes, ensuring the comprehensiveness and uniformity of waste slag treatment. Through the continuous friction of the grinding plate, the volume of the waste slag gradually decreases, which improves the treatment efficiency and reduces the volume pressure in the subsequent treatment process. The waste slag can be ground into fine particles, which is conducive to the secondary utilization of resources, such as as building materials or roadbed materials, thereby improving the utilization rate of resources. The dust and particulate matter generated during the waste slag treatment process are guided downward by the fan to reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the transmission mechanism of the present invention; Figure 2 It is a schematic diagram of the overall internal front view structure of the present invention; Figure 3 This is a schematic diagram of the motion state of the grinding plate of the present invention; Figure 4 It is a side view structural schematic diagram of the transmission mechanism of the present invention; Figure 5 It is a schematic diagram of the internal structure of the transmission mechanism of the present invention; Figure 6It is a schematic diagram of the rear view structure of the grinding plate of the present invention.

[0024] In the figure: 1. Equipment body; 2. Feed bin; 3. Flip cover; 4. Fan; 5. Hinge; 6. Right mounting bracket; 7. Left mounting bracket; 8. Movable slot; 9. Stepper motor; 10. Transmission shaft; 11. Transmission chain; 12. Turntable; 13. Positioning frame; 14. Guide plate; 15. Transmission slide plate; 16. Strengthening rib plate; 17. Grinding plate; 18. Guide rail; 19. Screw handle; 20. Slider; 21. Transmission rod; 22. Concave disc; 23. Slide groove; 24. Guide groove; 25. Grinding protrusion; 26. Aggregate bin. DETAILED DESCRIPTION

[0025] See also Figure 1-6 The present invention provides a technical solution: a grinding type waste residue treatment equipment and a harmless treatment method, comprising an equipment body 1, a feed bin 2 and a collection bin 26, wherein the feed bin 2 is located at the top of the equipment body 1, and the collection bin 26 is located at the bottom of the equipment body 1, and a right mounting bracket 6 and a left mounting bracket 7 are respectively arranged at the left and right ends of the interior of the equipment body 1, and a transmission mechanism is installed inside the right mounting bracket 6 and the left mounting bracket 7; The transmission mechanism includes a movable groove 8, a stepper motor 9, a transmission shaft 10, a transmission chain 11, a turntable 12, a positioning frame 13, a guide plate 14, a transmission slide plate 15 and a grinding plate 17. The movable groove 8 is preset inside the equipment body 1, the stepper motor 9 is installed inside the equipment body 1, the transmission shaft 10 is movably connected to the right mounting bracket 6 and the left mounting bracket 7 respectively, the output end of the stepper motor 9 and one end of the transmission shaft 10 are respectively provided with sprockets, the connecting end of the transmission chain 11 is respectively connected to the stepper motor 9 and the transmission shaft 10, the middle end of the turntable 12 is fixedly connected to one end of the transmission shaft 10, the positioning frame 13 is fixedly arranged on the outer surface of one end of the turntable 12, the guide plate 14 is located at the front end of the positioning frame 13, and the transmission slide plate 15 is connected between the guide plate 14 and the grinding plate 17; A concave plate 22 is provided at the middle end of the guide plate 14, and a slide groove 23 is formed between the concave plate 22 and the guide plate 14. A transmission rod 21 is movably connected inside the slide groove 23. One end of the transmission rod 21 is connected to a transmission slide plate 15. The transmission slide plate 15 is slidably connected to the equipment body 1. A reinforcing rib plate 16 is provided between the transmission slide plate 15 and the grinding plate 17.

[0026] A flip cover 3 is provided at the top of the feed bin 2, and a hinge 5 is provided between the flip cover 3 and the feed bin 2. The flip cover 3 covers the top of the feed bin 2, which can suppress dust and prevent dust from rising upward during the grinding process. The hinge 5 facilitates the flip cover 3 to flip open horizontally.

[0027] A fan 4 is provided at the top of the feed bin 2, and the output end of the fan 4 and the connecting end of the two grinding plates 17 are located on the same vertical line. The fan 4 provided in the feed bin 2 can increase the wind pressure inside the equipment, so that the ground waste slag particles settle downward, which not only avoids blockage, but also reduces the filling of particles between the waste slag and the grinding plates, and increases the friction between the grinding plates and the waste slag.

[0028] The outer surface of one end of the grinding plate 17 is in an inclined structure, and grinding protrusions 25 are evenly spaced on the surface of the grinding plate 17, and the length of the grinding protrusions 25 is the same as the length of the grinding plate 17. The grinding plate 17 grinds construction waste slag of different sizes through the inclined surface, and can grind irregular waste slag, reduce its own volume through continuous grinding, and fall downward, and the gap between the two grinding plates 17 gradually decreases from top to bottom, so that the grinding plate 17 can continue to keep full fit with the construction waste slag.

[0029] The inside of the equipment body 1 is symmetrically provided with guide rails 18, and the outer surface of the guide rails 18 is slidably connected with guide grooves 24, and the guide grooves 24 are preset inside the grinding plate 17 and the reinforcing rib plate 16. The guide rails 18 and the guide grooves 24 are guided and slidably matched, and cooperate with the reinforcing rib plate 16 to enhance the lateral pressure of the grinding plate 17, so as to avoid eccentric displacement of the two grinding plates 17 caused by the grinding action.

[0030] The delay difference of the stepper motors 9 provided for the right mounting bracket 6 and the left mounting bracket 7 is 1-2S. The stepper motors 9 of the two transmission mechanisms have a certain delay, and the delay effect facilitates the two grinding plates 17 to move vertically and staggered downward relative to each other.

[0031] A slider 20 is provided on the outer surface of one end of the guide plate 14, and the slider 20 is slidably matched with the turntable 12, and the two ends of the upper line of the turntable 12 are slidably matched with the outer surface of one end of the guide plate 14. The guide plate 14 slides along the inside of the positioning frame 13 through the slider 20, and a guide structure is provided at the connecting end of the positioning frame 13 and the guide plate 14, so that the guide plate 14 can move parallel to the turntable 12 as the center point, and the eccentric position difference generated by the movement is used to drive the transmission rod 21 and the transmission slide plate 15 to move vertically up and down.

[0032] A screw handle 19 is movably connected inside the positioning frame 13 , and the screw handle 19 is threadedly connected to the slider 20 . The screw handle 19 controls the position of the guide plate 14 by means of thread transmission.

[0033] A method for harmless treatment of grinding waste residue comprises the following steps: S1. Preprocessing steps: A. Physical grinding: Use grinding type waste residue treatment equipment to physically grind the waste residue, and the mechanical action of the grinder will break the waste residue into smaller particles for subsequent treatment; B. Chemical treatment: For waste residues containing harmful chemical components, chemical treatment methods such as neutralization, oxidation-reduction reactions can be used to reduce the content of harmful components or convert them into harmless substances; C. Particle size adjustment: Through screening or further crushing, the particle size distribution of the waste residue is adjusted to meet the requirements of subsequent separation and treatment processes; S2, separation step: A. Separation of metal and non-metal: Use magnetic separation, electric separation, flotation and other separation equipment to separate the metal and non-metal components in the pre-treated waste slag. The metal components usually have high economic value and can be recycled; B. Screening of harmful substances: Screening of harmful substances in waste residues, using special technical means, such as biological treatment, chemical precipitation, etc., to remove or reduce the concentration of harmful substances; S3. Harmless treatment steps: A. Treatment of metal waste slag: The separated metal waste slag can be recycled by smelting, electrolysis and other methods. These methods can not only reduce the volume of waste slag, but also extract metal resources; B. Non-metallic waste residue treatment: Non-metallic waste residue can be treated by solidification treatment, such as adding a solidifying agent to turn it into a stable solid or by stable landfilling. In addition, resource utilization can also be considered, such as as a building material or roadbed material; C. Treatment of Hazardous Substances: For harmful substances in waste residues, chemical stabilization, solidification or biological treatment can be used to convert them into harmless or low-harm substances; S4. Discharge or recovery steps: A. Discharge: The waste residue that has been harmlessly treated can be safely discharged if it meets the local discharge standards; B. Recycling: Waste residues with recycling value should be utilized as resources as much as possible, such as using the waste residues as raw materials or auxiliary materials for the production of other products, so as to achieve waste residue reduction, resource utilization and harmlessness.

[0034] Working principle: Construction waste is introduced from the feed bin 2 into the equipment body 1, the cover plate 3 is turned over to cover the gap at the top of the feed bin 2, and the fan 4 is turned on to continuously inject air into the equipment, and the two stepper motors 9 are started, and the two stepper motors 9 are set with a delay difference, so that the two grinding plates 17 reciprocate up and down, and the turntable 12 rotates with the transmission shaft 10 as the center point, and the transmission shaft 10 drives the positioning frame 13 to rotate synchronously, and the guide plate 14 and the screw handle 19 are threaded and slide in parallel, so that the guide plate 14 and the turntable 12 have an eccentricity difference, and the eccentricity generated by the rotation is used. The difference is guided by the slide groove 23 between the guide plate 14 and the concave plate 22 to guide the transmission rod 21, thereby continuously driving the transmission slide plate 15 to reciprocate in a small vertical motion, and the grinding plate 17 grinds the waste slag. The inclined surface of the grinding plate 17 is used to grind waste slag of different sizes. The larger particles of waste slag are reduced in volume after grinding and fall downward. At the same time, the small particles are discharged downward in cooperation with the injected air flow, so that the waste slag slides downward along the surface of the grinding plate 17, and the volume continues to shrink until it becomes granular and is finally discharged into the collecting bin 26.

Claims

1. A grinding type waste residue treatment equipment, characterized in that: The device comprises a device body (1), a feed bin (2) and a collection bin (26), wherein the feed bin (2) is located at the top of the device body (1), the collection bin (26) is located at the bottom of the device body (1), a right mounting bracket (6) and a left mounting bracket (7) are respectively arranged at the left and right ends of the device body (1), and a transmission mechanism is installed inside the right mounting bracket (6) and the left mounting bracket (7); The transmission mechanism comprises a movable groove (8), a stepper motor (9), a transmission shaft (10), a transmission chain (11), a rotating disk (12), a positioning frame (13), a guide plate (14), a transmission slide plate (15) and a grinding plate (17); the movable groove (8) is preset inside the device body (1); the stepper motor (9) is installed inside the device body (1); the transmission shaft (10) is movably connected to the inside of the right mounting bracket (6) and the left mounting bracket (7); a sprocket is provided at the output end of the stepper motor (9) and one end of the transmission shaft (10); a connecting end of the transmission chain (11) is connected to the stepper motor (9) and the transmission shaft (10) respectively; a middle end of the rotating disk (12) is fixedly connected to one end of the transmission shaft (10); the positioning frame (13) is fixedly arranged on the outer surface of one end of the rotating disk (12); the guide plate (14) is located at the front end of the positioning frame (13); and the transmission slide plate (15) is connected between the guide plate (14) and the grinding plate (17); A concave disc (22) is provided at the middle end of the guide disc (14), a slide groove (23) is formed between the concave disc (22) and the guide disc (14), a transmission rod (21) is movably connected inside the slide groove (23), one end of the transmission rod (21) is connected to a transmission slide plate (15), the transmission slide plate (15) is slidably connected to the equipment body (1), and a reinforcing rib plate (16) is provided between the transmission slide plate (15) and the grinding plate (17).

2. A grinding type waste residue treatment equipment according to claim 1, characterized in that: A flip cover plate (3) is provided at the top of the feed bin (2), and a hinge (5) is provided between the flip cover plate (3) and the feed bin (2).

3. A grinding type waste residue treatment equipment according to claim 1, characterized in that: A fan (4) is provided at the top of the feed bin (2), and an output end of the fan (4) and connection ends of the two grinding plates (17) are located on the same vertical line.

4. A grinding type waste residue treatment equipment according to claim 1, characterized in that: The outer surface of one end of the grinding plate (17) is in an inclined structure, and grinding protrusions (25) are distributed on the surface of the grinding plate (17) at equal intervals, and the length of the grinding protrusions (25) is the same as the length of the grinding plate (17).

5. The grinding type waste residue treatment equipment according to claim 1, characterized in that: The equipment body (1) is symmetrically provided with guide rails (18) inside, and the outer surface of the guide rails (18) is slidably connected with guide grooves (24), and the guide grooves (24) are preset inside the grinding plate (17) and the reinforcing rib plate (16).

6. The grinding type waste residue treatment equipment according to claim 1, characterized in that: The delay difference of the stepping motor (9) provided on the right mounting bracket (6) and the left mounting bracket (7) is 1S-2S.

7. The grinding type waste residue treatment equipment according to claim 1, characterized in that: A slider (20) is provided on the outer surface of one end of the guide disk (14), the slider (20) is slidably matched with the rotating disk (12), and both ends of the upper line of the rotating disk (12) are slidably matched with the outer surface of one end of the guide disk (14).

8. The grinding type waste residue treatment equipment according to claim 1, characterized in that: A screw handle (19) is movably connected inside the positioning frame (13), and the screw handle (19) is threadedly connected to the slider (20).

9. The method for harmless treatment of grinding waste residue according to claim 1, characterized in that: The following steps are also included: S1. Preprocessing steps: A. Physical grinding: Use grinding type waste residue treatment equipment to physically grind the waste residue, and the mechanical action of the grinder will break the waste residue into smaller particles for subsequent treatment; B. Chemical treatment: For waste residues containing harmful chemical components, chemical treatment methods such as neutralization, oxidation-reduction reactions can be used to reduce the content of harmful components or convert them into harmless substances; C. Particle size adjustment: Through screening or further crushing, the particle size distribution of the waste residue is adjusted to meet the requirements of subsequent separation and treatment processes; S2, separation step: A. Separation of metal and non-metal: Use magnetic separation, electric separation, flotation and other separation equipment to separate the metal and non-metal components in the pre-treated waste slag. The metal components usually have high economic value and can be recycled; B. Screening of harmful substances: Screening of harmful substances in waste residues, using special technical means, such as biological treatment, chemical precipitation, etc., to remove or reduce the concentration of harmful substances; S3. Harmless treatment steps: A. Treatment of metal waste slag: The separated metal waste slag can be recycled by smelting, electrolysis and other methods. These methods can not only reduce the volume of waste slag, but also extract metal resources; B. Non-metallic waste residue treatment: Non-metallic waste residue can be treated by solidification (such as adding a solidifying agent to turn it into a stable solid) or stable landfill. In addition, resource utilization can also be considered, such as as a building material or roadbed material; C. Treatment of Hazardous Substances: For harmful substances in waste residues, chemical stabilization, solidification or biological treatment can be used to convert them into harmless or low-harm substances; S4. Discharge or recovery steps: A. Discharge: The waste residue that has been harmlessly treated can be safely discharged if it meets the local discharge standards; B. Recycling: Waste residues with recycling value should be utilized as resources as much as possible, such as using the waste residues as raw materials or auxiliary materials for the production of other products, so as to achieve waste residue reduction, resource utilization and harmlessness.