Special magnetic separation device based on waste steel recovery

Abstract

The invention discloses a special magnetic separation device based on waste steel recovery, and relates to the technical field of waste steel recovery. Comprising a rack, a magnetic separation conveying belt, a magnetic suction conveying belt and a horizontal conveying belt are arranged in the rack from top to bottom, a feeding part is installed at the top of the rack and located above the magnetic separation conveying belt, and waste steel raw materials subjected to primary crushing fall on the magnetic separation conveying belt after passing through the feeding part; and a vertical plate is arranged on one side of the rack. The magnetic separation conveying belt, the crushing part, the horizontal conveying belt and the magnetic suction conveying belt are compactly integrated in the single rack through vertical layered layout, the occupied transverse space needed by a traditional multi-section magnetic suction line is remarkably reduced, the plant building and operation and maintenance cost is reduced, the continuous process of double magnetic separation and crushing enhanced separation is adopted, and the production efficiency is improved. And after crushing, secondary magnetic separation is carried out to precisely separate residual iron materials, efficient multi-stage separation can be realized without multi-section independent equipment, and the treatment efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of scrap steel recycling, and in particular to a magnetic separation device dedicated to scrap steel recycling. Background Art

[0002] Magnetic separation for scrap steel recycling generally uses magnetic screening to separate scrap steel and non-magnetic materials mixed in the scrap steel. Specifically, the scrap steel is allowed to move in the magnetic field. The scrap steel is attracted by the magnetic field and will not fall until it is far away from the magnetic field. Non-magnetic materials are not affected by the magnetic field and fall directly.

[0003] To achieve this goal, scrap steel recycling plants generally use magnetic conveyor belts for screening. In order to achieve a better screening purpose, the magnetic conveyor line is generally set up in multiple sections for multi-stage sorting. This method occupies a large area and requires a larger plant area to build the production line, which increases the plant production cost and has relatively low efficiency. In view of this situation, the present invention proposes a new solution to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a magnetic separation device dedicated to scrap steel recovery to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a magnetic separation device dedicated to scrap steel recovery, comprising: Magnetic conveyor belts, loading parts, crushing parts, horizontal conveyor belts and magnetic conveyor belts; The magnetic separation device for scrap steel recycling also includes a frame, a magnetic separation conveyor belt, a magnetic suction conveyor belt and a horizontal conveyor belt are arranged in the frame from top to bottom, a loading piece is installed at the top of the frame and located above the magnetic separation conveyor belt, and the scrap steel raw materials that have undergone primary crushing pass through the loading piece and fall onto the magnetic separation conveyor belt; A vertical plate is set on one side of the frame, and the crushing piece is installed on one side of the vertical plate. At the same time, the crushing piece is also located under one end of the magnetic separation conveyor belt. A part of the scrap steel raw materials falls into the crushing piece after magnetic separation for further crushing. The crushed scrap steel raw materials are spread on the horizontal conveyor belt and further transported. During the transportation process, the remaining iron materials in the scrap steel raw materials are removed by the magnetic suction conveyor belt.

[0006] Further regarding this solution, the magnetic separation conveyor belt includes a conveyor belt frame, one end of the conveyor belt frame is fixed to one side of the vertical plate and the other end is fixed to the frame through a fixed plate, the conveyor belt frame is inclined toward one end of the vertical plate, rollers are rotatably installed at both ends of the conveyor belt frame, the rollers are connected by a magnetic conveyor belt, and the surface of the magnetic conveyor belt is covered with a layer of external conveyor belt.

[0007] Further to this solution, two separating rollers are rotatably installed at the bottom of the conveyor belt frame, and a gap is set between the two separating rollers. The magnetic conveyor belt passes under the first separating roller and then over the other separating roller, and the external conveyor belt passes under the two separating rollers in turn.

[0008] Further to this scheme, the loading part includes a drop hopper, which is fixed at the top of the frame, and the discharge end of the drop hopper is located above the magnetic separation conveyor belt. Two arms are fixed on the drop hopper, and a spreading roller 1 is rotatably installed at the end of the two arms. A gap is set between the spreading roller 1 and the external conveyor belt. A driving source is installed on one side of one of the arms, and the rotation of the spreading roller 1 is controlled by the driving source.

[0009] Further regarding this scheme, the crushing part includes a crusher, which is located below the unloading end of non-ferrous materials. One end of a horizontal conveyor belt is installed on one side of a vertical plate, and the horizontal conveyor belt is located below the crusher. The scrap steel raw materials crushed by the crusher fall onto the horizontal conveyor belt.

[0010] Furthermore, regarding this solution, two connecting arms are fixed on one side of the crusher, and a spreading roller 2 is also rotatably installed between the two connecting arms. A synchronization component is installed on one side of the crusher to achieve synchronous rotation of the spreading roller 2 and the crushing roller inside the crusher.

[0011] Further to this solution, the magnetic conveyor belt is located between the magnetic separation conveyor belt and the horizontal conveyor belt and is parallel to the horizontal conveyor belt, and a gap is provided between the bottom of the magnetic conveyor belt and the horizontal conveyor belt.

[0012] Further to the scheme, a partition plate is fixedly installed at the bottom of the frame, the partition plate is vertically arranged and extends upward to the bottom of the magnetic separation conveyor belt, and the left and right sides of the partition plate are respectively divided into a non-ferrous material collection area and a ferrous material collection area by the partition plate, and a discharge hopper is fixed on the side of the partition plate facing the ferrous material collection area; Further to the solution, a window is provided on the partition plate, a part of the magnetic conveyor belt passes through the window, and the top surface of the magnetic conveyor belt is attached to the top of the window, and a fixing plate is also installed on the frame of the magnetic conveyor belt to connect with the frame to maintain the stability of the magnetic conveyor belt; Further to this solution, a separation conveyor belt is arranged below the ferrous material discharge end of the magnetic separation conveyor belt, and the vertical projection area of ​​the separation conveyor belt does not overlap with the projection area of ​​the release area of ​​the magnetic separation conveyor belt.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Based on the magnetic separation device specially used for scrap steel recycling, the magnetic separation conveyor belt, crushed parts, horizontal conveyor belt and magnetic suction conveyor belt are compactly integrated into a single frame through a vertical layered layout, which significantly reduces the lateral space occupied by the traditional multi-section magnetic suction line, reduces the plant construction and operation and maintenance costs, and adopts a continuous process of double magnetic separation + crushing and enhanced sorting. After crushing, the secondary magnetic separation accurately separates the residual ferrous materials. Efficient multi-stage sorting can be achieved without multiple independent equipment, greatly improving the processing efficiency.

[0014] At the same time, its dynamic magnetic control and automatic spreading technology optimizes the sorting effect. The magnetic conveyor belt realizes controllable release of magnetic force through the separation roller design, and combines with the spreading roller to evenly disperse the material, which not only avoids the omission of traditional magnetic belts due to material accumulation, but also reduces the entrapment of non-ferrous materials. The crushing process breaks up sticky waste and exposes hidden iron. Combined with the magnetic conveyor belt with precise gaps, it ensures that the rejection rate of iron materials is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the magnetic separation conveyor belt, crushing parts, horizontal conveyor belt and magnetic suction conveyor belt of the present invention; Figure 3 It is a schematic diagram of the front view position structure of the magnetic separation conveyor belt, crushing parts, horizontal conveyor belt and magnetic suction conveyor belt of the present invention; Figure 4 It is a schematic diagram of the overall front view structure of the present invention.

[0016] In the figure: 1. frame; 2. magnetic separation conveyor belt; 201. conveyor belt frame; 202. separation roller; 203. roller; 204. external conveyor belt; 205. magnetic conveyor belt; 206. baffle; 207. fixed plate; 3. loading part; 301. drop hopper; 302. support arm; 303. driving source; 304. spreading roller one; 4. crushing part; 401. crusher; 402. spreading roller two; 403. connecting arm; 404. synchronous component; 5. vertical plate; 6. horizontal conveyor belt; 7. magnetic suction conveyor belt; 8. separation plate; 801. window; 9. unloading hopper; 10. separation conveyor belt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1As shown, the present invention provides a technical solution: a magnetic separation device dedicated to scrap steel recycling, comprising a magnetic separation conveyor belt 2, a feeding piece 3, a crushing piece 4, a horizontal conveyor belt 6 and a magnetic suction conveyor belt 7; The special magnetic separation device for scrap steel recycling also includes a frame 1, which is a rectangular frame structure formed by welding multiple steel rods. A magnetic separation conveyor belt 2, a magnetic suction conveyor belt 7 and a horizontal conveyor belt 6 are arranged from top to bottom in the frame 1, wherein a loading piece 3 is installed at the top of the frame 1 and is located above the magnetic separation conveyor belt 2. The scrap steel raw materials that have undergone primary crushing pass through the loading piece 3 and fall onto the magnetic separation conveyor belt 2. The magnetic separation conveyor belt 2 can remove a large amount of ferrous materials from the scrap steel raw materials. A vertical plate 5 is provided on one side of the frame 1, and a crushing piece 4 is installed on one side of the vertical plate 5. At the same time, the crushing piece 4 is also located below one end of the magnetic separation conveyor belt 2. A portion of the scrap steel raw materials fall into the crushing piece 4 after magnetic separation for further crushing, and the crushed scrap steel raw materials are spread on the water The scrap steel is further transported on the flat conveyor belt 6. During the transportation process, the remaining ferrous materials in the scrap steel raw materials are removed by the magnetic conveyor belt 7. The device significantly improves the sorting efficiency and resource recovery rate through the coordinated design of multi-stage magnetic separation and crushing. It adopts a vertical layered layout, and the magnetic separation conveyor belt 2, the magnetic conveyor belt 7 and the horizontal conveyor belt 6 are integrated from top to bottom in the frame 1. Combined with the action of gravity, the material is automatically circulated, saving space and energy consumption. After a large proportion of ferrous materials are removed by the initial magnetic separation, the scrap steel that is not adsorbed is refined by the crushing pieces 4, and when it is spread on the horizontal conveyor belt 6, the surface area is increased to improve the accuracy of the secondary magnetic attraction, ensuring that the iron residue is minimized. The frame 1 adopts a welded steel pole frame structure, which is stable and easy to expand.

[0019] like Figure 2 and Figure 3As shown, in order to ensure the smooth implementation of the above embodiment, it is necessary to understand that the magnetic separation conveyor belt 2 includes a conveyor belt frame 201, one end of the conveyor belt frame 201 is fixed to one side of the vertical plate 5 and the other end is fixed to the frame 1 through a fixing plate 207, baffles 206 are fixed on both sides of the conveyor belt frame 201, and the baffles 206 are used to prevent the scrap steel raw materials from falling directly, and the conveyor belt frame 201 is tilted toward one end of the vertical plate 5. Rollers 203 are rotatably installed at both ends of the conveyor belt frame 201, and the rollers 203 are connected by a magnetic conveyor belt 205. The magnetic conveyor belt 205 is used to remove magnetic materials in the scrap steel raw materials. The surface of the conveyor belt 201 is covered with an outer conveyor belt 204, and the outer conveyor belt 204 and the magnetic conveyor belt 205 are in contact with each other. There is a large friction between the outer conveyor belt 204 and the magnetic conveyor belt 205. Therefore, the outer conveyor belt 204 can stably cover the surface of the magnetic conveyor belt 205. When conveying materials, the magnetic materials in the scrap steel raw materials are removed by the magnetic conveyor belt 205, and the outer conveyor belt 204 can protect the magnetic conveyor belt 205 and avoid scratches on the magnetic conveyor belt 205 caused by the scrap steel raw materials. It should be understood that two sub-belts are rotatably installed at the bottom of the conveyor belt frame 201. The two separating rollers 202 are provided with a gap between them. The magnetic conveyor belt 205 passes under the first separating roller 202 and then passes over the other separating roller 202. The external conveyor belt 204 passes under the two separating rollers 202 in sequence. That is to say, at the gap between the two separating rollers 202, the external conveyor belt 204 does not contact the magnetic conveyor belt 205. The magnetic conveyor belt 205 loses its ability to absorb magnetic materials at this position. That is to say, between the two separating rollers 202, the external conveyor belt 204 separates from the magnetic conveyor belt 205, forcing the magnetic separation conveyor belt 205 to be at this position. The magnetic attraction effect is lost at the point where the ferrous material is released, which means that the vertical projection area between the two separation rollers 202 is the release area of ​​the ferrous material, and the external conveyor belt 204 covers the surface of the magnetic conveyor belt 205, and moves synchronously through friction, which not only protects the magnetic conveyor belt 205 from being scratched by sharp scrap steel, but also ensures that the ferrous material is stably adsorbed. During use, when the conveyor belt runs to the bottom, at the gap between the two rollers, the magnetic conveyor belt 205 is disengaged from the external conveyor belt 204, causing the magnetic field to fail due to the increase in distance, and the adsorbed ferrous material loses its magnetic bondage, automatically detaches and falls into the designated collection area, completing the precise release of the magnetic material.

[0020] like Figure 3As shown, it should be understood that the material transporting direction of the magnetic separation conveyor belt 2 is toward the first direction, that is, the material transporting direction is away from the vertical plate 5. Since the magnetic separation conveyor belt 2 is inclined toward one end of the vertical plate 5, under ideal conditions, the non-ferrous materials in the scrap steel raw materials tend to roll toward one end of the vertical plate 5, and the ferrous materials in the scrap steel raw materials are transported to the other end under the adsorption effect of the magnetic conveyor belt 205, thereby separating the non-ferrous materials and ferrous materials in the scrap steel raw materials.

[0021] like Figure 3 and Figure 4 As shown, to ensure the smooth implementation of the above embodiment, the loading part 3 includes a drop hopper 301, the drop hopper 301 is fixed at the top of the frame 1, and the discharge end of the drop hopper 301 is located above the magnetic separation conveyor belt 2, and two support arms 302 are fixed on the drop hopper 301, and the ends of the two support arms 302 are rotatably installed with a spreading roller 304, and a gap is set between the spreading roller 304 and the external conveyor belt 204, and a driving source 303 is installed on one side of one of the support arms 302, and the rotation of the spreading roller 304 is controlled by the driving source 303. When the scrap steel raw material is discharged from the drop hopper 301 to the magnetic separation conveyor belt 2, the scrap steel raw material is spread by the spreading roller 304, thereby increasing the contact between the scrap steel raw material and the magnetic separation conveyor belt 2. In this case, the removal efficiency of the magnetic separation conveyor belt 2 for ferrous materials can be increased.

[0022] The scrap steel raw materials after preliminary crushing contain more ferrous materials and are mixed with non-ferrous materials. In this case, due to the entrainment of non-ferrous materials, or because the ferrous materials and non-ferrous materials are sticky or the non-ferrous materials are heavy, the ferrous materials are not completely removed, and part of the ferrous materials and the non-ferrous materials move away from the first direction and fall down; The crushing unit 4 includes a crusher 401, which is located just below the unloading end of the non-ferrous material. The scrap steel raw materials screened by the magnetic separation conveyor belt 2 enter the crusher 401, and the scrap steel raw materials are further crushed, and the non-ferrous materials in the scrap steel raw materials are further crushed to expose the ferrous materials in the scrap steel raw materials, and the ferrous materials are crushed into smaller pieces, thereby reducing the quality of the ferrous materials and making them easier to be removed. One end of the horizontal conveyor belt 6 is installed on one side of the vertical plate 5, and the horizontal conveyor belt 6 is just below the crusher 401. After being crushed by the crusher 401, the scrap steel raw materials are further crushed. The scrap steel raw materials fall onto the horizontal conveyor belt 6. Two connecting arms 403 are fixed on one side of the crusher 401. A spreading roller 2 402 is also rotatably installed between the two connecting arms 403 for spreading the crushed scrap steel raw materials and reducing the thickness of the scrap steel raw materials on the horizontal conveyor belt 6 after spreading. A synchronization component 404 is installed on one side of the crusher 401. The synchronization component 404 realizes the synchronous rotation of the spreading roller 2 402 and the crushing roller inside the crusher 401. The synchronization component 404 can be a gear-driven or belt-driven component, which is a relatively mature prior art and will not be elaborated here.

[0023] like Figure 3 and Figure 4 As shown, the magnetic conveyor belt 7 is located between the magnetic separation conveyor belt 2 and the horizontal conveyor belt 6 and is arranged parallel to the horizontal conveyor belt 6. The conveyor belt of the magnetic conveyor belt 7 also adopts a conveyor belt containing magnetic material, which can adsorb ferrous materials. A gap is arranged between the bottom of the magnetic conveyor belt 7 and the horizontal conveyor belt 6. The thickness of the scrap steel raw material after being spread by the spreading roller 2 402 does not exceed 2 cm, and the gap between the conveyor belt surface of the magnetic conveyor belt 7 and the conveyor belt surface of the horizontal conveyor belt 6 does not exceed 2.5 cm. The magnetic conveyor belt 7 adsorbs the ferrous materials in the scrap steel raw material, thereby further removing the ferrous materials in the scrap steel raw material, and the non-ferrous materials fall downward and are collected.

[0024] like Figure 3 and Figure 4As shown, in order to ensure the smooth implementation of the above embodiment, it is necessary to understand that a partition plate 8 is fixedly installed at the bottom of the frame 1, and the partition plate 8 is vertically arranged and extends upward to the bottom of the magnetic separation conveyor belt 2. The left and right sides of the partition plate 8 are respectively divided into a non-ferrous material collection area and a ferrous material collection area, wherein the side of the partition plate 8 facing the horizontal conveyor belt 6 is the non-ferrous material collection area, and the other side is the ferrous material collection area. A discharge hopper 9 is fixed on the side of the partition plate 8 facing the ferrous material collection area, and the ferrous materials are collected at the discharge hopper 9, wherein a window is provided on the partition plate 8. Opening 801, a part of the magnetic conveyor belt 205 passes through the window 801, and the top surface of the magnetic conveyor belt 205 is in contact with the top of the window 801. When the magnetic conveyor belt 205 adsorbs the ferrous material on the conveyor belt, it will be transported to the ferrous material collection area through the window 801. Since the top of the conveyor belt is in contact with the top of the window 801, under the continuous movement of the conveyor belt, the ferrous material will be scraped off the magnetic conveyor belt 7 by the partition plate 8 and fall on the discharge hopper 9 to complete the collection. It should be noted that a fixed plate 207 is also installed on the frame of the magnetic conveyor belt 7 and connected to the frame 1 to maintain the stability of the magnetic conveyor belt 7.

[0025] What needs to be known about the above-mentioned embodiment is that, since the scrap steel raw material is an irregular material, when the scrap steel raw material is separated from the non-ferrous material and the ferrous material on the magnetic separation conveyor belt 2, due to the shape of the non-ferrous material and the entrapment of the ferrous material, a part of the ferrous material will still be discharged toward the first direction together with the ferrous material. In order to reduce the mixing of non-ferrous materials, a separation conveyor belt 10 is arranged below the ferrous material unloading end of the magnetic separation conveyor belt 2. The separation conveyor belt 10 is used to catch the non-ferrous material dropped from the magnetic separation conveyor belt 2 to avoid mixing. It should be understood that the vertical projection area a of the separation conveyor belt 10 does not overlap with the release projection area b of the magnetic separation conveyor belt 2 in any way to avoid both ferrous materials and non-ferrous materials falling on the separation conveyor belt 10.

[0026] After primary crushing, the scrap steel raw materials are evenly spread to the inclined magnetic separation conveyor belt 2 through the drop hopper 301 of the feeding part 3. The magnetic conveyor belt 205 absorbs the iron materials under the protection of the external conveyor belt 204, and the non-iron materials slide to the end of the vertical plate 5 due to gravity and fall into the crusher 401 (a vibrator can be installed on the conveyor belt frame 201 to improve the shaking effect). When the magnetic conveyor belt 205 runs to the bottom, the separation roller 202 cooperates with the external conveyor belt 204 to realize the dropping of iron materials, and the iron materials are collected by the discharge hopper 9. The mixed material that has not been completely removed is finely crushed by the pulverizer 401, and then spread into a thin layer by the spreading roller 402 and placed on the horizontal conveyor belt 6. The magnetic conveyor belt 7 is arranged in parallel to absorb the residual iron at a close distance, and the non-iron is collected by free fall. The device adopts a vertical layered structure and uses gravity to achieve automatic material flow. Combined with spreading optimization, multi-stage magnetic separation and crushing coordination, it not only improves the sorting accuracy and iron recovery rate, but also ensures compact space, reduced energy consumption and anti-mixing effect through the separation conveyor belt 10 and the frame integrated design.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A magnetic separation device dedicated to scrap steel recovery, characterized in that: include: A magnetic separation conveyor belt (2), a loading piece (3), a crushing piece (4), a horizontal conveyor belt (6), and a magnetic suction conveyor belt (7); The magnetic separation device for scrap steel recycling further comprises a frame (1), a magnetic separation conveyor belt (2), a magnetic suction conveyor belt (7) and a horizontal conveyor belt (6) arranged from top to bottom in the frame (1), a loading piece (3) installed at the top of the frame (1) and located above the magnetic separation conveyor belt (2), and the scrap steel raw materials that have undergone primary crushing pass through the loading piece (3) and fall onto the magnetic separation conveyor belt (2); A vertical plate (5) is provided on one side of the frame (1), and a crushing piece (4) is installed on one side of the vertical plate (5). The crushing piece (4) is also located below one end of the magnetic separation conveyor belt (2). A portion of the scrap steel raw materials falls into the crushing piece (4) after magnetic separation for further crushing. The crushed scrap steel raw materials are spread on the horizontal conveyor belt (6) and further conveyed. During the conveying process, the remaining iron materials in the scrap steel raw materials are removed by the magnetic suction conveyor belt (7).

2. The magnetic separation device dedicated to scrap steel recovery according to claim 1 is characterized in that: The magnetic separation conveyor belt (2) comprises a conveyor belt frame (201), one end of the conveyor belt frame (201) is fixed to one side of the vertical plate (5) and the other end is fixed to the frame (1) via a fixing plate (207), the conveyor belt frame (201) is inclined toward one end of the vertical plate (5), rollers (203) are rotatably mounted at both ends of the conveyor belt frame (201), the rollers (203) are connected via a magnetic conveyor belt (205), and a layer of external conveyor belt (204) covers the surface of the magnetic conveyor belt (205).

3. The magnetic separation device dedicated to scrap steel recovery according to claim 2 is characterized in that: Two separation rollers (202) are rotatably mounted at the bottom of the conveyor belt frame (201), a gap being provided between the two separation rollers (202), the magnetic conveyor belt (205) passing under the first separation roller (202) and then passing over the other separation roller (202), and the external conveyor belt (204) passes under the two separation rollers (202) in sequence.

4. The magnetic separation device dedicated to scrap steel recovery according to claim 1 is characterized in that: The loading member (3) comprises a hopper (301), the hopper (301) being fixed at the top of the frame (1), and a discharge end of the hopper (301) being located above the magnetic separation conveyor belt (2), two arms (302) being fixed on the hopper (301), and a paving roller (304) being rotatably mounted at the ends of the two arms (302), a gap being provided between the paving roller (304) and the external conveyor belt (204), and a driving source (303) being mounted on one side of one of the arms (302), and the rotation of the paving roller (304) is controlled by the driving source (303).

5. The magnetic separation device dedicated to scrap steel recovery according to claim 1 is characterized in that: The crushing element (4) comprises a crusher (401), the crusher (401) is located below the non-ferrous material discharge end, one end of a horizontal conveyor belt (6) is installed on one side of a vertical plate (5), and the horizontal conveyor belt (6) is located below the crusher (401), and the scrap steel raw materials crushed by the crusher (401) fall onto the horizontal conveyor belt (6).

6. The magnetic separation device dedicated to scrap steel recovery according to claim 5 is characterized in that: Two connecting arms (403) are fixed on one side of the pulverizer (401), and a second spreading roller (402) is also rotatably mounted between the two connecting arms (403). A synchronization component (404) is mounted on one side of the pulverizer (401) to achieve synchronous rotation of the second spreading roller (402) and a pulverizing roller inside the pulverizer (401).

7. The magnetic separation device dedicated to scrap steel recovery according to claim 1 is characterized in that: The magnetic conveyor belt (7) is located between the magnetic separation conveyor belt (2) and the horizontal conveyor belt (6) and is parallel to the horizontal conveyor belt (6), and a gap is provided between the bottom of the magnetic conveyor belt (7) and the horizontal conveyor belt (6).

8. The magnetic separation device dedicated to scrap steel recovery according to claim 1 is characterized in that: A partition plate (8) is fixedly mounted at the bottom of the frame (1); the partition plate (8) is vertically arranged and extends upward to the bottom of the magnetic separation conveyor belt (2); the left and right sides of the partition plate (8) are respectively divided into a non-ferrous material collection area and a ferrous material collection area by the partition plate (8); a discharge hopper (9) is fixed on the side of the partition plate (8) facing the ferrous material collection area.

9. The magnetic separation device dedicated to scrap steel recovery according to claim 8 is characterized in that: A window (801) is provided on the partition plate (8), a portion of the magnetic conveyor belt (205) passes through the window (801), and the top surface of the magnetic conveyor belt (205) is attached to the top of the window (801). A fixing plate (207) is also installed on the frame of the magnetic conveyor belt (7) and connected to the frame (1) to maintain the stability of the magnetic conveyor belt (7).

10. The magnetic separation device dedicated to scrap steel recovery according to claim 1, characterized in that: A separation conveyor belt (10) is arranged below the ferrous material discharge end of the magnetic separation conveyor belt (2), and the vertical projection area of ​​the separation conveyor belt (10) does not overlap with the projection area of ​​the release area of ​​the magnetic separation conveyor belt (2).

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