A high-strength roll magnetic separator for regenerating fine aggregate

Abstract

The utility model relates to the technical field of magnetic separation equipment, concretely relates to a high strength roller type magnetic separator for separating magnetic impurities in recycled fine aggregate. The high strength roller type magnetic separator for recycled fine aggregate, the magnetic roller and the rear roller are rotatably installed on the frame, the belt is tensioned through the magnetic roller and the rear roller, the driving mechanism comprises a motor and a transmission mechanism, the motor is connected with the magnetic roller through the transmission mechanism to drive the belt movement, the feeding hopper is arranged above the belt, the distributing mechanism comprises a flow divider, and the flow divider is arranged below the magnetic roller. The high strength roller type magnetic separator for recycled fine aggregate solves the problems of insufficient magnetic field strength, low separation efficiency and poor adaptability of the traditional magnetic separator. The magnetic roller forms a high gradient magnetic field with sharp change near the roller surface, which fundamentally overcomes the defects of weak magnetic field and low gradient of the traditional magnetic separator, and ensures the accurate separation of magnetic impurities and non-magnetic aggregate under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of magnetic separation equipment technology, specifically to a high-strength roller magnetic separator for separating magnetic impurities in recycled fine aggregates. Background Technology

[0002] The rapid development of urban construction has led to a year-on-year increase in the demand for sand. However, natural fine aggregate resources are limited, and their extraction is increasingly difficult and costly, making it difficult to meet future construction needs. Against this backdrop, crushing waste concrete into recycled fine aggregate to replace natural sand can significantly reduce dependence on natural fine aggregate resources and effectively alleviate the problem of waste concrete accumulation, thus playing a positive role in environmental protection. However, compared to natural fine aggregate, recycled fine aggregate has a large amount of hardened cement paste and other magnetic impurities on its surface, resulting in high water absorption, low apparent density, and low compressive strength. These characteristics limit the application of recycled fine aggregate in high-performance concrete and mortar. Therefore, producing high-quality recycled fine aggregate that can replace natural fine aggregate has become a primary task for the construction industry.

[0003] Existing magnetic separators are mostly drum or belt types, which suffer from problems such as insufficient magnetic field strength, low separation efficiency, and poor adaptability, making it difficult to meet the demand for high-precision separation of recycled fine aggregates. Therefore, to address the limitations of existing magnetic separators, this paper proposes a high-strength roller magnetic separator suitable for the efficient separation of recycled fine aggregates, thereby improving the quality of recycled fine aggregates and meeting the needs for high-value utilization. Utility Model Content

[0004] This invention provides a stirring device for achieving efficient powder-liquid mixing and a wet dyeing and finishing process for leather blanks, thus solving the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-strength roller magnetic separator for recycled fine aggregate, comprising a frame, a magnetic roller, a rear roller, a belt, a drive mechanism, a feed hopper, and a distribution mechanism. The magnetic roller and the rear roller are rotatably mounted on the frame. The belt is tensioned through the magnetic roller and the rear roller. The drive mechanism includes a motor and a transmission mechanism. The motor is connected to the magnetic roller through the transmission mechanism to drive the belt. The feed hopper is located above the belt. The distribution mechanism includes a diverter plate located below the magnetic roller.

[0006] Furthermore, the magnetic roller includes a roller, a plurality of neodymium iron boron permanent magnets and a high-permeability steel disk. The roller is rotatably mounted on a frame. The plurality of neodymium iron boron permanent magnets and the high-permeability steel disk are alternately arranged and fixed on the roller. The magnetic poles of adjacent neodymium iron boron permanent magnets are opposite to each other to form a high gradient magnetic field.

[0007] Furthermore, the magnetic roller also includes end caps, which are disposed at both ends of the roller to achieve sealing and magnetic isolation.

[0008] Furthermore, the transmission mechanism includes a motor shaft gear, a roller gear, and a chain. The motor shaft gear is mounted on the output end of the motor, the roller gear is mounted on a roller, and the chain is connected to the motor shaft gear and the roller gear.

[0009] Furthermore, the rear roller includes an inert roller.

[0010] Furthermore, the feed hopper has an elongated discharge port, which is arranged along the width direction of the feed belt.

[0011] Furthermore, the elongated discharge port of the feed hopper is arranged close to the conveyor belt.

[0012] Furthermore, the material distribution mechanism also includes a movable frame, on which the diverting plate is mounted and can move back and forth relative to the magnetic roller, and the movable frame is connected to the frame.

[0013] Furthermore, the movable frame is equipped with a slide rail for the movement of the diverter plate.

[0014] Furthermore, the material distribution mechanism also includes a high-quality aggregate collection frame and a magnetic aggregate collection frame, which are disposed on both sides of the diversion plate.

[0015] As described above, the high-strength roller magnetic separator for recycled fine aggregates provided by this utility model solves the problems of insufficient magnetic field strength, low separation efficiency, and poor adaptability of traditional magnetic separators. By forming a rapidly changing high-gradient magnetic field near the roller surface, the defects of weak magnetic field and low gradient in traditional magnetic separators are fundamentally overcome. The nylon end caps at both ends of the magnetic roller achieve zero magnetic leakage and magnetic system sealing, significantly improving separation efficiency, adaptability, and equipment lifespan, and simultaneously improving the iron removal rate and quality of recycled fine aggregates. The diverter plate ensures accurate separation of magnetic impurities and non-magnetic aggregates under different working conditions. The feed hopper facilitates uniform unloading of recycled fine aggregates on the belt, which helps reduce dust diffusion of recycled fine aggregates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the high-strength roller magnetic separator for recycled fine aggregates according to this utility model;

[0017] Figure 2 This is a perspective view of the high-strength roller magnetic separator for recycled fine aggregates according to this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the magnetic roller of the high-strength roller magnetic separator for recycled fine aggregates according to this utility model. Detailed Implementation

[0019] The present invention will be further described below through specific embodiments.

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Reference Figures 1 to 3 As shown, a high-strength roller magnetic separator for recycled fine aggregate includes a frame 1, a magnetic roller 2, a rear roller 3, a belt 4, a drive mechanism 5, a feed hopper 6, and a material distribution mechanism 7.

[0022] Frame 1 is made of welded steel sections, and the bottom of Frame 1 is equipped with leveling feet;

[0023] The magnetic roller 2 includes a roller 21, a plurality of neodymium iron boron permanent magnets 22, a high-permeability steel disk 23, and an end cap 24. The roller 21 is rotatably mounted on the frame 1 via a bearing seat. The neodymium iron boron permanent magnets 22 and the high-permeability steel disk 23 are alternately arranged and fixed on the roller 21. The magnetic poles of adjacent neodymium iron boron permanent magnets 22 are opposite to each other to form a high gradient magnetic field. The end cap 24 is disposed at both ends of the roller 21 to achieve sealing and magnetic isolation, prevent magnetic leakage and protect the magnetic system. Preferably, the end cap is made of nylon material.

[0024] The rear roller 3 includes an inert roller, which is rotatably mounted on the frame 1;

[0025] The belt 4 is tensioned by the magnetic roller 2 and the rear roller 3. The belt 4 is made of wear-resistant rubber and has anti-slip texture on the outer surface. The tension of the belt 4 is adjusted by tensioning bolts at both ends.

[0026] The drive mechanism 5 includes a motor 51 and a transmission mechanism 52. The motor is fixed on the frame 1. The motor 51 is connected to the magnetic roller 2 through the transmission mechanism 52 to drive the belt 4 to move. The transmission mechanism 52 includes a motor shaft gear 521, a roller shaft gear 522, and a chain 523. The motor shaft gear 521 is installed at the output end of the motor 51. The roller shaft gear 522 is installed on the roller 21. The chain 523 is connected to the motor shaft gear 521 and the roller shaft gear 522. When the motor 2 starts, the motor shaft gear 521 rotates, which drives the chain 523 to rotate. The chain 523 rotates, which drives the roller shaft gear 522 to rotate. The roller shaft gear 522 rotates, which drives the magnetic roller 2 to rotate. The magnetic roller 2 rotates, which drives the belt 4 to move.

[0027] The feed hopper 6 is located above the belt 4. The feed hopper has a long strip-shaped discharge port 61. The long strip-shaped discharge port 61 is arranged along the width direction of the feeding belt 4. The recycled fine aggregate contains small particles. The long strip-shaped discharge port 61 facilitates the uniform discharge of the aggregate on the belt. The long strip-shaped discharge port 61 is arranged close to the belt 4, which helps to reduce the dust diffusion of the recycled fine aggregate.

[0028] The material sorting mechanism 7 includes a diversion plate 71, a movable frame 72, a high-quality aggregate collection frame 73, and a magnetic aggregate collection frame 74. The diversion plate 71 is located below the magnetic roller 2. The diversion plate 71 is mounted on the movable frame 72 and can move back and forth relative to the magnetic roller 2. The movable frame 72 is connected to the frame 1 and is provided with a slide rail 721 for the diversion plate 71 to move. The high-quality aggregate collection frame 73 and the magnetic impurity collection frame 74 are located on both sides of the diversion plate 71 and are used to receive the sorted aggregate and magnetic impurities.

[0029] Reference Figures 1 to 3 As shown, the process of the high-strength roller magnetic separator used for recycled fine aggregates is as follows:

[0030] The motor 2 of the drive mechanism 5 starts and drives the motor shaft gear 521 to rotate. The rotation of the motor shaft gear 521 drives the chain 523 to rotate. The rotation of the chain 523 drives the roller shaft gear 522 to rotate. The rotation of the roller shaft gear 522 drives the magnetic roller 2 to rotate. The rotation of the magnetic roller 2 drives the belt 4 to move. The recycled fine aggregate falls evenly onto the belt 4 through the feed hopper 6 and moves towards the magnetic roller 2 along with the belt 4. The recycled fine aggregate contains non-magnetic aggregate and magnetic impurities. The magnetic roller 2 adsorbs the magnetic impurities and falls into the magnetic aggregate collection frame 74 through the diversion plate 71. The non-magnetic aggregate falls into the high-quality aggregate collection frame 73 through the diversion plate 71. The position of the diversion plate 71 can be moved back and forth. The falling trajectory is changed in real time according to different belt speeds of the belt 4 or material layer thickness to ensure accurate separation of magnetic impurities and non-magnetic aggregates under different working conditions.

[0031] The above technical solution solves the problems of insufficient magnetic field strength, low sorting efficiency, and poor adaptability of traditional magnetic separators. By alternating the arrangement of multiple neodymium iron boron permanent magnets 22 and high-permeability steel discs 23 inside the magnetic roller with adjacent magnetic poles facing each other, a rapidly changing high-gradient magnetic field is formed near the roller surface, fundamentally overcoming the defects of weak magnetic field and low gradient in traditional magnetic separators. The nylon end caps at both ends of the magnetic roller achieve zero magnetic leakage and magnetic system sealing, significantly improving sorting efficiency, adaptability, and equipment lifespan, and simultaneously improving the iron removal rate and quality of recycled fine aggregates. The position of the diverter plate 71 is adjustable, and the discharge trajectory can be changed in real time according to different belt speeds 4 or material layer thicknesses to ensure accurate separation of magnetic impurities and non-magnetic aggregates under different working conditions. The feed hopper 6 uses a long strip discharge port 61 to facilitate the uniform unloading of recycled fine aggregates on the belt. The long strip discharge port 61 is arranged close to the belt 4, which helps to reduce the dust diffusion of recycled fine aggregates.

[0032] The above are only some specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A high-strength roller magnetic separator for recycled fine aggregates, characterized in that: The device includes a frame, a magnetic roller, a rear roller, a belt, a drive mechanism, a feed hopper, and a distribution mechanism. The magnetic roller and the rear roller are rotatably mounted on the frame. The belt is tensioned by the magnetic roller and the rear roller. The drive mechanism includes a motor and a transmission mechanism. The motor is connected to the magnetic roller through the transmission mechanism to drive the belt. The feed hopper is located above the belt. The distribution mechanism includes a flow divider plate located below the magnetic roller.

2. A high-strength roller magnetic separator for recycled fine aggregates according to claim 1, characterized in that: The magnetic roller includes a roller, multiple neodymium iron boron permanent magnets and a high-permeability steel disk. The roller is rotatably mounted on a frame. The multiple neodymium iron boron permanent magnets and the high-permeability steel disk are alternately arranged and fixed on the roller. The magnetic poles of adjacent neodymium iron boron permanent magnets are opposite to each other to form a high-gradient magnetic field.

3. A high-strength roller magnetic separator for recycled fine aggregates according to claim 2, characterized in that: The magnetic roller also includes end caps, which are disposed at both ends of the roller to achieve sealing and magnetic isolation.

4. A high-strength roller magnetic separator for recycled fine aggregates according to claim 2, characterized in that: The transmission mechanism includes a motor shaft gear, a roller gear, and a chain. The motor shaft gear is mounted on the output end of the motor, the roller gear is mounted on a roller, and the chain is connected to the motor shaft gear and the roller gear.

5. A high-strength roller magnetic separator for recycled fine aggregates according to claim 1, characterized in that: The rear roller includes an inert roller.

6. A high-strength roller magnetic separator for recycled fine aggregates according to claim 1, characterized in that: The feed hopper has an elongated discharge port, which is arranged along the width of the feed belt.

7. A high-strength roller magnetic separator for recycled fine aggregates according to claim 6, characterized in that: The long, narrow outlet of the feed hopper is arranged close to the conveyor belt.

8. A high-strength roller magnetic separator for recycled fine aggregates according to claim 1, characterized in that: The material distribution mechanism also includes a movable frame, on which the diverting plate is mounted and can move back and forth with the magnetic roller, and the movable frame is connected to the frame.

9. A high-strength roller magnetic separator for recycled fine aggregates according to claim 8, characterized in that: The mobile frame is equipped with slide rails for the movement of the diverter plate.

10. A high-strength roller magnetic separator for recycled fine aggregates according to claim 1, characterized in that: The material distribution mechanism also includes a high-quality aggregate collection frame and a magnetic aggregate collection frame, which are disposed on both sides of the diversion plate.

Images