Multi-stage classification equipment for waste steel and iron machining

Abstract

The invention relates to the technical field of PCB (printed circuit board) processing, and discloses multistage classification equipment for waste steel processing, which comprises a classification box, a feeding mechanism, a drying piece, an impurity removal mechanism and a classification assembly are arranged in the classification box, and the impurity removal mechanism comprises an impurity removal bin, a driving rod, a pushing wheel, a connecting rod, an auxiliary rod, a connecting block, an elastic sheet, an impurity discharge plate and a waste collection box. The impurity removal bin is installed in the classification box, the driving rod is rotationally arranged in the classification box and located below the impurity removal bin, the pushing wheel is installed at one end of the driving rod, the auxiliary rod is installed on the right side of the bottom of the impurity removal bin, and the connecting rod is installed between the pushing wheel and the auxiliary rod and used for driving the impurity removal bin to move back and forth. The number of the connecting blocks is four, the connecting blocks are distributed on the periphery of the classifying box, and the elastic pieces are installed on the outer walls between the connecting blocks and the impurity removing bin. The device has the following advantages and effects that impurities can be automatically removed, and classified recycling can be carried out.

Description

Technical Field

[0001] The invention relates to the technical field of waste steel classification, and in particular to a multi-stage classification device for processing waste steel. Background Art

[0002] The scrap steel processing industry is an industry that has developed rapidly in recent years. With the development of the global economy and the improvement of environmental awareness, the prospects for the scrap steel processing industry are very broad. People pay more and more attention to the recycling and reuse of resources, and its processing and recycling will not cause new pollution to the environment.

[0003] After recycling, scrap iron is often mixed with other metals and needs to be selected. In addition, the scrap iron is of different sizes. The larger scrap iron needs to be processed separately before it can be melted, while the smaller scrap iron can be melted directly without crushing. In addition, during the recycling process, the surface area of ​​​​the steel will be mixed with a lot of stains. If it is not treated, it will affect the quality of the molten product during subsequent recycling. Therefore, it is necessary to propose a multi-level classification equipment for scrap steel processing to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-stage classification device for processing scrap steel, which has the effect of automatically removing impurities and performing classification and recycling.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a multi-stage classification equipment for processing scrap steel, including a classification box, wherein a feeding mechanism, a drying member, a debris removal mechanism and a classification component are arranged in the classification box, wherein the debris removal mechanism includes a debris removal bin, a driving rod, a driving wheel, a connecting rod, a sub-rod, a connecting block, an elastic sheet, a debris removal plate and a waste collection box, wherein the debris removal bin is installed in the classification box, the driving rod is rotatably arranged in the classification box and is located below the debris removal bin, the driving wheel is installed at one end of the driving rod, the sub-rod is installed at the right side of the bottom of the debris removal bin, the connecting rod is installed between the driving wheel and the sub-rod for driving the debris removal bin to move back and forth, the number of the connecting blocks is four and they are distributed around the classification box, the elastic sheet is installed on the outer wall between the connecting block and the debris removal bin, the debris removal plate is located directly below the debris removal bin, the waste collection box is installed on the left side wall of the classification box and is located at the discharge port at the left end of the debris removal plate, and a material unloading component is also arranged in the debris removal bin.

[0006] By adopting the above technical scheme, the scrap steel is sent to the impurity removal bin by the feeding mechanism, and the driving rod is in a rotating state, driving the driving wheel to rotate, and the auxiliary rod and the impurity removal bin are pushed back and forth by the connecting rod. Under the elastic force of the elastic sheet, the impurity removal bin can better screen the scrap steel, screen out small-volume scrap iron fragments, and drop them to the impurity discharge plate, which are collected by the waste collection box, so that the small-volume scrap iron materials can be directly melted and the large-volume steel can continue to be classified and recycled later.

[0007] The present invention is further configured as follows: the feeding mechanism includes a conveyor belt installed on the left side wall of the classification box, a first motor for driving the conveyor belt is installed at the front end of the classification box, and a first belt is installed between one end of the driving roller on the conveyor belt and the driving rod.

[0008] By adopting the above technical solution, the first motor drives the conveyor belt to operate, and the scrap steel is sent to the impurity removal bin. At the same time, the first belt drives the driving rod to operate to achieve screening processing.

[0009] The present invention is further configured as follows: fixed plates are installed on both sides of the conveyor belt, a plurality of sprinkler heads and water pipes connecting the plurality of sprinkler heads are installed on the top between the fixed plates on both sides, and the water pipes are connected to an external water supply mechanism.

[0010] By adopting the above technical solution, water is sent to the sprinkler head through the water pipe, so that the scrap steel on the upper end of the conveyor belt can be washed, the stains can be cleaned, and the recycling quality can be higher.

[0011] The present invention is further configured as follows: the drying element comprises an air duct installed on the top wall of the classification box, a fan is installed in the air duct, an air outlet is installed at the bottom, a plurality of heating wires are equidistantly arranged in the air outlet, and a linkage element for driving the fan to operate is arranged at the upper end of the fan.

[0012] By adopting the above technical solution, when the fan is running, the generated air flow enters the air outlet from the air duct, and after being heated by the heating wire, the scrap steel entering the impurity removal bin can be quickly dried.

[0013] The present invention is further configured as follows: the linkage member includes a first slave bevel tooth installed on the upper end of the fan rotating rod, a linkage rod is installed on the top wall of the classification box, one end of the linkage rod is installed with a first main bevel tooth adapted to the first slave bevel tooth, and a second belt is installed between the other end and the driving rod.

[0014] By adopting the above technical solution, while the driving rod rotates, the end drives the linkage rod to rotate through the second belt, so that the first main bevel gear rotates, and the first slave bevel gear rotates, so that the fan runs to dry the scrap steel.

[0015] The present invention is further configured as follows: the unloading component includes a second motor installed on the left side wall of the impurity removal bin, a first screw rod is installed at the output end of the second motor, a guide rod arranged parallel to the first screw rod is installed at the other end of the inner cavity of the impurity removal bin, a scraper slidably adapted to the guide rod is installed on the external thread of the first screw rod, and a unloading inclined plate is installed on the right side wall of the inner cavity of the classification box.

[0016] By adopting the above technical solution, the first screw is driven to rotate by the second motor, and the scraper is pushed to slide back and forth in the impurity removal bin under the guidance of the guide rod, so that the large scrap steel remaining in the impurity removal bin is pushed out and falls through the unloading inclined plate.

[0017] The present invention is further configured as follows: the classification component includes a lifting plate movably arranged at the bottom of the inner cavity of the classification box, a driving device for driving the lifting plate is arranged below the lifting plate, and a magnetic suction device is arranged on the right side wall of the classification box.

[0018] By adopting the above technical solution, when large scrap steel falls onto the lifting plate, the lifting plate is vibrated up and down by the driving device, and the iron material is sucked and recovered by the magnetic suction device, and the steel material is in the lifting plate and finally recycled and processed uniformly.

[0019] The present invention is further configured as follows: the driving device includes a third motor installed at the rear end of the classification box, two driving frames are arranged at the bottom of the inner cavity of the classification box, the output end of the third motor is connected to the end of one driving frame, a third belt is installed between the other ends of the two driving frames, and a push rod hinged to the bottom of the lifting plate is arranged on the driving frame.

[0020] By adopting the above technical solution, the third motor drives the driving frame on one side to rotate, and the other driving frame is rotated under the drive of the third belt, so that the lifting plate is driven to vibrate up and down through the push rod, and the scrap steel is thrown up to facilitate its classification and processing.

[0021] The present invention is further configured as follows: the magnetic material suction device includes a fixed frame installed on the right side wall of the classification box, a driven rod and a second screw rod extending to the inner cavity of the classification box are rotatably arranged on the fixed frame, a second slave bevel gear is installed on the right end of the second screw rod, a second main bevel gear adapted to the second slave bevel gear is installed on one end of the driven rod, and a fourth belt connected to the end of the driving frame is installed on the other end, a sliding plate is provided on the external thread of the second screw rod, a telescopic rod and a movable plate connected to the telescopic rod are provided at the bottom of the sliding plate, a plurality of magnetic frames are equidistantly arranged at the bottom of the movable plate, and a collecting bin is provided on the right side wall of the classification box directly below the fixed frame.

[0022] By adopting the above technical solution, while the driving frame rotates, the fourth belt drives the driven rod to rotate, so that the second main bevel gear at the end rotates, and the second follower bevel gear is pushed to rotate by engagement, so that the second screw rod rotates, thereby controlling the sliding plate to move left, driving the moving plate and the magnetic frame as a whole to be located directly above the lifting plate, and energizing the magnetic frame to make it magnetized so that the iron material is absorbed. The second screw rod is a reciprocating screw rod. After absorbing the iron material, it is controlled to move back and absorb it above the collection bin. After power failure, the iron material automatically falls into the collection bin for recovery.

[0023] The present invention is further configured as follows: both front and rear side walls of the inner cavity of the classification box are provided with limiting slots, and both front and rear ends of the movable plate are provided with limiting columns inserted into the limiting slots and slidably matched therewith.

[0024] By adopting the above technical solution, with the cooperation of the limiting groove and the limiting column, the translation of the magnetic rack is made more stable, and at the same time, the magnetic rack enters the classification box.

[0025] The beneficial effects of the present invention are:

[0026] 1. In the present invention, the feeding mechanism delivers the scrap steel to the impurity removal bin, and the driving rod is in a rotating state, driving the driving wheel to rotate, and the connecting rod drives the auxiliary rod and the impurity removal bin to swing back and forth, and under the elastic force of the elastic sheet, the impurity removal bin can better screen the scrap steel, screen out small-volume scrap iron fragments, and drop them to the impurity discharge plate, which are collected by the waste collection box, so that the small-volume scrap iron materials can be directly melted, and the large-volume steel can continue to be classified and recycled later.

[0027] 2. In the present invention, the water pipe delivers water to the spray head, which can wash the scrap steel on the upper end of the conveyor belt, clean the stains, and make the recycling quality higher.

[0028] 3. In the present invention, the third motor drives the driving frame on one side to rotate, and the other driving frame is rotated under the drive of the third belt, so that the lifting plate is driven to vibrate up and down through the push rod, and the scrap steel is thrown up. While the driving frame rotates, the fourth belt drives the driven rod to rotate, so that the second main bevel gear at the end rotates, and the second slave bevel gear is pushed to rotate through engagement, so that the second screw rod rotates, thereby controlling the sliding plate to move left, driving the moving plate and the magnetic frame as a whole to be located directly above the lifting plate, and energizing the magnetic frame to make it magnetic to absorb the iron material. The second screw rod is a reciprocating screw rod. After absorbing the iron material, it is controlled to move back and absorb it above the collection bin. After power failure, the iron material automatically falls into the collection bin for recycling, thereby realizing automatic classification and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 The present invention is a diagram showing the overall structure of a multi-stage classification device for processing scrap steel.

[0031] Figure 2 The present invention Figure 1 Cross-sectional view of the sorting box.

[0032] Figure 3 The present invention Figure 2 Connection structure diagram of the drying unit and the impurity removal mechanism.

[0033] Figure 4 The present invention Figure 3 The overall structural diagram of the central decomposition warehouse.

[0034] Figure 5 The present invention Figure 2 Structural diagram of the medium feed mechanism.

[0035] Figure 6 The present invention Figure 3 The overall structure diagram of the drying unit.

[0036] Figure 7 The present invention Figure 2 Overall rear view structure diagram of the classified components.

[0037] Figure 8 The present invention Figure 2 The overall front view structure diagram of the classification components.

[0038] In the figure, 1, classification box; 2, feeding mechanism; 21, conveyor belt; 22, first motor; 23, first belt; 24, fixing plate; 25, sprinkler head; 26, water pipe; 3, drying element; 31, air cylinder; 32, fan; 33, air outlet; 34, heating wire; 35, first slave bevel gear; 36, linkage rod; 37, first main bevel gear; 38, second belt; 4, impurity removal mechanism; 41, impurity removal bin; 42, driving rod; 43, driving wheel; 44, connecting rod; 45, auxiliary rod; 46, connecting block; 47, elastic sheet; 48, impurity removal plate; 49, waste collection box ; 410, second motor; 411, first screw rod; 412, guide rod; 413, scraper; 414, unloading inclined plate; 5, classification component; 51, lifting plate; 52, third motor; 53, driving frame; 54, third belt; 55, push rod; 56, fixed frame; 57, driven rod; 58, second screw rod; 59, second slave bevel gear; 510, second main bevel gear; 511, fourth belt; 512, sliding plate; 513, telescopic rod; 514, moving plate; 515, magnetic frame; 516, collecting bin; 517, limiting slot; 518, limiting column. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, a multi-stage classification device for processing scrap steel includes a classification box 1, wherein the classification box 1 is provided with a feeding mechanism 2, a drying member 3, a debris removal mechanism 4 and a classification component 5, wherein the debris removal mechanism 4 includes a debris removal bin 41, a driving rod 42, a driving wheel 43, a connecting rod 44, a secondary rod 45, a connecting block 46, an elastic sheet 47, a debris removal plate 48 and a waste collection box 49, wherein the debris removal bin 41 is installed in the classification box 1, the driving rod 42 is rotatably arranged in the classification box 1 and is located below the debris removal bin 41, and the driving wheel 43 is installed at the driving rod 42. At one end, the auxiliary rod 45 is installed on the right side of the bottom of the debris removal bin 41, and the connecting rod 44 is installed between the driving wheel 43 and the auxiliary rod 45 to drive the debris removal bin 41 to move back and forth. There are four connecting blocks 46 and they are distributed around the classification box 1. The elastic sheet 47 is installed on the outer wall between the connecting block 46 and the debris removal bin 41. The debris removal plate 48 is located directly below the debris removal bin 41. The waste collection box 49 is installed on the left side wall of the classification box 1 and is located at the discharge port at the left end of the debris removal plate 48. A material unloading component is also provided in the debris removal bin 41.

[0041] The scrap steel is delivered to the impurity removal bin 41 by the feeding mechanism 2, and the driving rod 42 is in a rotating state, driving the driving wheel 43 to rotate, and the auxiliary rod 45 and the impurity removal bin 41 are pushed back and forth by the connecting rod 44. Under the elastic force of the elastic sheet 47, the impurity removal bin 41 can better screen the scrap steel, screen out small-volume scrap iron fragments, and drop them to the impurity discharge plate 48, and collect them through the waste collection box 49, so that the small-volume scrap iron materials can be directly melted, and the large-volume steel can continue to be classified and recycled later.

[0042] like Figure 5 As shown, the feeding mechanism 2 includes a conveyor belt 21 installed on the left side wall of the classification box 1, a first motor 22 for driving the conveyor belt 21 is installed at the front end of the classification box 1, a first belt 23 is installed between one end of the driving roller on the conveyor belt 21 and the driving rod 42, and fixed plates 24 are installed on both sides of the conveyor belt 21. A plurality of spray heads 25 and a water pipe 26 connecting the plurality of spray heads 25 are installed on the top between the fixed plates 24 on both sides, and the water pipe 26 is connected to an external water supply mechanism.

[0043] The first motor 22 drives the conveyor belt 21 to deliver the scrap steel into the impurity removal bin 41. The first belt 23 drives the driving rod 42 to achieve screening. The water pipe 26 delivers water to the spray head 25 to rinse the scrap steel on the upper end of the conveyor belt 21, clean the stains, and improve the recycling quality.

[0044] like Figure 3 , Figure 6 As shown, the drying part 3 includes a wind tube 31 installed on the top wall of the classification box 1, a fan 32 is installed in the wind tube 31, an air outlet 33 is installed at the bottom, a plurality of heating wires 34 are equidistantly arranged in the air outlet 33, and a linkage part for driving the fan 32 is provided at the upper end of the fan 32, and the linkage part includes a first slave bevel gear 35 installed at the upper end of the rotating rod of the fan 32, a linkage rod 36 is installed on the top wall of the classification box 1, a first main bevel gear 37 adapted to the first slave bevel gear 35 is installed at one end of the linkage rod 36, and a second belt 38 is installed between the other end and the driving rod 42.

[0045] While the driving rod 42 rotates, the end portion drives the linkage rod 36 to rotate through the second belt 38, so that the first main bevel gear 37 rotates, and the first slave bevel gear 35 rotates, so that the fan 32 operates to dry the scrap steel. When the fan is running, the generated air flow enters the air outlet 33 from the air cylinder 31, and after being heated by the heating wire 34, the scrap steel entering the impurity removal bin 41 can be quickly dried.

[0046] like Figure 3 , Figure 4As shown, the unloading component includes a second motor 410 installed on the left side wall of the impurity removal bin 41, a first screw rod 411 is installed at the output end of the second motor 410, a guide rod 412 arranged parallel to the first screw rod 411 is installed at the other end of the inner cavity of the impurity removal bin 41, a scraper 413 slidably adapted to the guide rod 412 is installed on the external thread of the first screw rod 411, and a unloading inclined plate 414 is installed on the right side wall of the inner cavity of the classification box 1. The first screw rod 411 is driven to rotate by the second motor 410, and under the guidance of the guide rod 412, the scraper 413 is pushed to slide back and forth in the impurity removal bin 41, thereby pushing out the large scrap steel remaining in the impurity removal bin 41 and dropping through the unloading inclined plate 414.

[0047] like Figure 2 , Figure 7 , Figure 8 As shown, the classification component 5 includes a lifting plate 51 movably arranged at the bottom of the inner cavity of the classification box 1, and a driving device for driving the lifting plate 51 is arranged below the lifting plate 51. A magnetic suction device is arranged on the right side wall of the classification box 1. The driving device includes a third motor 52 installed at the rear end of the classification box 1, and two driving frames 53 are arranged at the bottom of the inner cavity of the classification box 1. The output end of the third motor 52 is connected to the end of one driving frame 53, and a third belt 54 is installed between the other ends of the two driving frames 53. A push rod 55 hinged to the bottom of the lifting plate 51 is arranged on the driving frame 53.

[0048] When large scrap steel falls onto the lifting plate 51, the lifting plate 51 is vibrated up and down by the driving device, and the iron material is sucked and recovered by the magnetic suction device. The steel material is in the lifting plate 51 and finally recycled. The driving frame 53 on one side is driven by the third motor 52 to rotate, and the other driving frame 53 is rotated under the drive of the third belt 54, so that the lifting plate 51 is driven to vibrate up and down through the push rod 55, and the scrap steel is thrown up, which is convenient for its classification and processing.

[0049] like Figure 7 , Figure 8As shown, the magnetic material suction device includes a fixed frame 56 installed on the right side wall of the classification box 1, and a driven rod 57 and a second screw rod 58 extending to the inner cavity of the classification box 1 are rotatably arranged on the fixed frame 56. A second slave bevel gear 59 is installed at the right end of the second screw rod 58. A second main bevel gear 510 adapted to the second slave bevel gear 59 is installed at one end of the driven rod 57, and a fourth belt 511 connected to the end of the driving frame 53 is installed at the other end. The external thread of the second screw rod 58 is provided with a sliding plate 512, a telescopic rod 513 and a movable plate 514 connected to the telescopic rod 513 are provided at the bottom of the sliding plate 512, a plurality of magnetic frames 515 are equidistantly provided at the bottom of the movable plate 514, a collecting bin 516 is provided on the right side wall of the classification box 1 just below the fixed frame 56, limiting grooves 517 are provided on the front and rear side walls of the inner cavity of the classification box 1, and limiting columns 518 are provided at the front and rear ends of the movable plate 514 which are inserted into the limiting grooves 517 and slidably adapted thereto.

[0050] When the driving frame 53 rotates, the driven rod 57 is driven to rotate through the fourth belt 511, so that the second main bevel gear 510 at the end rotates, and the second slave bevel gear 59 is pushed to rotate through engagement, so that the second screw rod 58 rotates, thereby controlling the sliding plate 512 to move left, driving the movable plate 514 and the magnetic frame 515 to be located above the lifting plate 51 as a whole, and the magnetic frame 515 is energized to make it magnetic to absorb the iron material. The second screw rod 58 is a reciprocating screw rod. After absorbing the iron material, it is controlled to move back and absorb it above the collection bin 516. After power is off, the iron material automatically falls into the collection bin 516 for recovery. With the cooperation of the limit slot 517 and the limit column 518, the translation of the magnetic frame 515 is more stable, and at the same time, it enters the classification box 1.

Claims

1. A multi-stage classification device for processing scrap steel, comprising a classification box (1), characterized in that: The classification box (1) is provided with a feeding mechanism (2), a drying component (3), a debris removal mechanism (4) and a classification component (5); the debris removal mechanism (4) comprises a debris removal bin (41), a driving rod (42), a driving wheel (43), a connecting rod (44), a secondary rod (45), a connecting block (46), an elastic sheet (47), a debris removal plate (48) and a waste collection box (49); the debris removal bin (41) is installed in the classification box (1); the driving rod (42) is rotatably arranged in the classification box (1) and is located below the debris removal bin (41); the driving wheel (43) is installed at one end of the driving rod (42); the secondary rod (45) is connected to the classification box (1); and the secondary rod (45) is connected to the classification box (1). The connecting rod (44) is installed between the driving wheel (43) and the auxiliary rod (45) to drive the cleaning bin (41) to move back and forth. The number of the connecting blocks (46) is four and they are distributed around the classification box (1). The elastic sheet (47) is installed on the outer wall between the connecting block (46) and the cleaning bin (41). The cleaning plate (48) is located directly below the cleaning bin (41). The waste collection box (49) is installed on the left side wall of the classification box (1) and is located at the discharge port at the left end of the cleaning plate (48). A material unloading component is also provided in the cleaning bin (41).

2. The multi-stage classification equipment for scrap steel processing according to claim 1 is characterized in that: The feeding mechanism (2) comprises a conveyor belt (21) mounted on the left side wall of the classification box (1); a first motor (22) for driving the conveyor belt (21) is mounted at the front end of the classification box (1); and a first belt (23) is mounted between one end of a driving roller on the conveyor belt (21) and a driving rod (42).

3. The multi-stage classification equipment for scrap steel processing according to claim 2 is characterized in that: Fixed plates (24) are installed on both sides of the conveyor belt (21), and a plurality of spray heads (25) and a water pipe (26) connecting the plurality of spray heads (25) are installed on the top between the fixed plates (24) on both sides, and the water pipe (26) is connected to an external water supply mechanism.

4. The multi-stage classification equipment for scrap steel processing according to claim 1, characterized in that: The drying element (3) comprises an air duct (31) mounted on the top wall of the classification box (1), a fan (32) being mounted in the air duct (31), an air outlet (33) being mounted at the bottom, a plurality of heating wires (34) being arranged at equal intervals in the air outlet (33), and a linkage element for driving the fan (32) to operate being arranged at the upper end thereof.

5. The multi-stage classification equipment for scrap steel processing according to claim 4 is characterized in that: The linkage member comprises a first slave bevel tooth (35) mounted on the upper end of a rotating rod of the fan (32); a linkage rod (36) is mounted on the top wall of the classification box (1); a first main bevel tooth (37) adapted to the first slave bevel tooth (35) is mounted on one end of the linkage rod (36); and a second belt (38) is mounted between the other end and the driving rod (42).

6. The multi-stage classification equipment for scrap steel processing according to claim 1, characterized in that: The material unloading component comprises a second motor (410) installed on the left side wall of the impurity removal bin (41); a first screw rod (411) is installed on the output end of the second motor (410); a guide rod (412) arranged parallel to the first screw rod (411) is installed on the other end of the inner cavity of the impurity removal bin (41); a scraper (413) slidably matched with the guide rod (412) is installed on the external thread of the first screw rod (411); and a material unloading inclined plate (414) is installed on the right side wall of the inner cavity of the classification box (1).

7. The multi-stage classification equipment for scrap steel processing according to claim 6, characterized in that: The classification component (5) comprises a lifting plate (51) movably arranged at the bottom of the inner cavity of the classification box (1), a driving device for driving the lifting plate (51) to be lifted is arranged below the lifting plate (51), and a magnetic material suction device is arranged on the right side wall of the classification box (1).

8. The multi-stage classification equipment for scrap steel processing according to claim 7, characterized in that: The driving device comprises a third motor (52) installed at the rear end of the classification box (1); two driving frames (53) are arranged at the bottom of the inner cavity of the classification box (1); the output end of the third motor (52) is connected to the end of one driving frame (53); a third belt (54) is installed between the other ends of the two driving frames (53); and a push rod (55) hinged to the bottom of the lifting plate (51) is arranged on the driving frame (53).

9. The multi-stage classification equipment for scrap steel processing according to claim 8, characterized in that: The magnetic material suction device comprises a fixed frame (56) installed on the right side wall of the classification box (1), a driven rod (57) and a second screw rod (58) extending to the inner cavity of the classification box (1) are rotatably arranged on the fixed frame (56), a second slave bevel gear (59) is installed at the right end of the second screw rod (58), a second main bevel gear (510) adapted to the second slave bevel gear (59) is installed at one end of the driven rod (57), and a fourth belt (511) connected to the end of the driving frame (53) is installed at the other end, a sliding plate (512) is provided on the external thread of the second screw rod (58), a telescopic rod (513) and a movable plate (514) connected to the telescopic rod (513) are provided at the bottom of the sliding plate (512), and a plurality of magnetic frames (515) are equidistantly arranged at the bottom of the movable plate (514), and a collecting bin (516) is provided on the right side wall of the classification box (1) directly below the fixed frame (56).

10. The multi-stage classification equipment for scrap steel processing according to claim 9, characterized in that: The front and rear side walls of the inner cavity of the classification box (1) are both provided with limiting slots (517), and the front and rear ends of the movable plate (514) are both provided with limiting columns (518) inserted into the limiting slots (517) and slidably matched therewith.

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