Graded crushing treatment device and method for steel slag

Abstract

The invention belongs to the technical field of crushing devices, particularly relates to a graded crushing treatment device and method for steel slag, and provides the following scheme aiming at the problems that steel slag particles meeting the particle size requirement are excessively crushed and a screen is easily blocked by uncrushed steel slag due to the fact that pre-screening treatment is not carried out before crushing treatment of the steel slag. Comprising a main frame body, a pretreatment module is arranged in the main frame body, a feeding hopper is arranged at the top of the main frame body, the main frame body and the feeding hopper are provided with the same dust falling module, the inner wall of the bottom of the main frame body is fixedly connected with a pulverizer body, the pretreatment module comprises a sliding frame, and the sliding frame slides on the inner wall of the main frame body. According to the graded crushing treatment device and method for the steel slag, steel slag particles meeting the particle size requirement can be screened out before the steel slag is crushed, excessive crushing is avoided, vibration is continuously generated in the screening process, and the surface of the screen is cleaned through the cleaning roller.

Description

Technical Field

[0001] The present invention relates to the technical field of pulverizing devices, and in particular to a device and method for grading and pulverizing steel slag. Background Art

[0002] Slag classification and crushing is a way to finely process slag. It is to classify the slag into multiple levels and crush them separately according to the different sizes of slag particles, using crushing equipment or crushing processes of different specifications, so as to achieve a more reasonable particle size distribution and meet the requirements of slag particle size in different application scenarios.

[0003] In the prior art, the steel slag is usually not pre-screened before being crushed, which will cause the steel slag particles that meet the particle size requirements to be over-crushed, resulting in increased production energy consumption and reduced work efficiency. At the same time, the uncrushed steel slag is of different sizes and can easily clog the screen. Summary of the invention

[0004] The invention discloses a device and method for grading and crushing steel slag, aiming to solve the technical problem in the background technology that if the steel slag is not pre-screened before being crushed, the steel slag particles that meet the particle size requirements will be over-crushed, and the uncrushed steel slag will easily clog the screen.

[0005] The present invention proposes a grading and crushing processing device for steel slag, which includes a main frame, a pretreatment module is arranged inside the main frame, and a feed hopper is arranged on the top of the main frame, the main frame and the feed hopper are provided with the same dust reduction module, the bottom inner wall of the main frame is fixedly connected to the crusher body, the pretreatment module includes a sliding frame, the sliding frame slides on the inner wall of the main frame, and two symmetrical installation boxes are fixedly connected to the sliding frame, the top of the two installation boxes are fixedly connected to the same screen, the top of the screen is fixedly connected to two symmetrical installation frames, the dust reduction module includes a water tank, and the water tank is fixedly connected to the top of the main frame.

[0006] In a preferred embodiment, a plurality of striking parts are fixedly connected to the bottom of the screen at equal distances, threaded rods are movably connected to the two installation boxes, and a driving motor is fixedly connected to the inner wall of one side of the two installation boxes, the output ends of the two driving motors are fixedly connected to one end of the corresponding threaded rod, and the outside of the two threaded rods are connected to a sliding platform through threads.

[0007] In a preferred solution, the two sliding tables are fixedly connected to opposite sides with fixed cylinders, the interiors of the two fixed cylinders are movably connected with movable cylinders, and one side of the two fixed cylinders is fixedly connected with fixed parts, the tops of the two fixed parts are fixedly connected with arc rods, the outer walls of the two arc rods are slidably connected with sliding blocks, the two sliding blocks are fixedly connected to the corresponding movable cylinders, the outsides of the two arc rods are surrounded by two springs, one end of the two springs is fixedly connected to the corresponding sliding blocks, and the other end is fixedly connected to the corresponding fixing parts.

[0008] In a preferred embodiment, connecting rod frames are fixedly connected to opposite sides of the two sliding tables, circular holes are provided on the two connecting rod frames, a same rotating rod is movably connected in the two circular holes, a cleaning roller and two gear rings are fixedly connected to the outer wall of the rotating rod, and racks are fixedly connected to the tops of the two mounting frames, and the two gear rings are meshed with the corresponding racks.

[0009] In a preferred solution, the inner walls of the two mounting frames are movably connected with the same adjustable screen plate, and the adjustable screen plate slides on the top of the screen. The top of the screen is fixedly connected with two electric telescopic rods, and the driving ends of the two electric telescopic rods are fixedly connected to the adjustable screen plate.

[0010] In a preferred solution, the inner walls on the opposite sides of the two installation frames are movably connected with support rods, one ends of the two support rods are movably connected with clamping pieces, and the inner walls on the opposite sides of the two installation frames are fixedly connected with electric push rods and guide rails, the two guide rails are slidably connected with sliding pieces, the driving ends of the two electric push rods are fixedly connected to the corresponding sliding pieces, the two sliding pieces are movably connected with support rods, and the ends of the two support rods away from the sliding pieces are movably connected to the corresponding support rods.

[0011] By setting up a pre-treatment module, the screen plate is pushed and pulled by an electric telescopic rod to control the size of the screen holes for the slag to pass through, and the slag particles that meet the particle size requirements are screened out in advance to avoid excessive crushing. Then the electric push rod pushes the sliding part, which drives the support rod to push the clamping part to fix the position of the adjustable screen plate to prevent sliding during screen vibration and affect the screening effect. During screening, the sliding table is driven by a motor to slide back and forth, and the impact part is continuously driven to impact the impacted part under the elastic action of the spring, so that the screen vibrates continuously and the screening efficiency is increased. At the same time, through the meshing of the tooth ring and the rack, the rotating rod drives the cleaning roller to rotate, and the slag on the adjustable screen plate is continuously turned over to avoid clogging of the screen holes, thereby improving work efficiency.

[0012] In a preferred solution, the dust reduction module also includes a delivery pump, which is fixedly connected to one side of a water tank, and the input end of the delivery pump is fixedly connected to the water tank, a shunt pipe is fixedly connected to the top of the main frame, the output end of the delivery pump is fixedly connected to the shunt pipe, and both ends of the shunt pipe are fixedly connected to connecting pipes.

[0013] In a preferred solution, both sides of the feed hopper are fixedly connected with fixed frames, both fixed frames are fixedly connected with dust reduction pipes, multiple nozzles are evenly arranged on the two dust reduction pipes, and the ends of the two connecting pipes away from the diversion pipes are fixedly connected to the corresponding dust reduction pipes.

[0014] In a preferred solution, a feeding piece is fixedly connected to the inner wall of the main frame, and two mounting holes are provided on the main frame, crushing rollers are movably connected in the two mounting holes, gears are fixedly connected to the outer walls of the two crushing rollers, the two gears are meshed with each other, a transmission wheel 2 is fixedly connected to the outer wall of one of the crushing rollers, a universal motor is fixedly connected to one side of the main frame, a transmission wheel 1 is fixedly connected to the output end of the universal motor, and the outer walls of the transmission wheel 1 and the transmission wheel 2 are slidably connected to the same transmission belt.

[0015] By providing a dust reduction module, during the feeding and screening process, the water in the water tank is pumped into the diversion pipe through the delivery pump, enters the dust reduction pipe through the connecting pipe, and is sprayed out through the nozzle. The fine dust generated when the slag is fed and screened is treated for dust reduction, which improves the cleanliness of the working environment and prevents the staff from inhaling it.

[0016] A method for treating steel slag by graded crushing, using the steel slag graded crushing device as described above, comprises the following steps: Step 1: Before feeding, start the electric telescopic rod to push and pull the adjusting screen plate to control the size of the screen hole for the slag to pass through, and screen out the slag particles that meet the particle size requirements in advance to avoid excessive crushing. Then the electric push rod pushes the sliding part, driving the support rod to push the clamping part to fix the position of the adjusting screen plate. During screening, the sliding table is driven by the driving motor to slide back and forth. Under the elastic action of the spring, the impact part is continuously driven to impact the impacted part, causing the screen to vibrate continuously. At the same time, through the meshing of the gear ring and the rack, the rotating rod drives the cleaning roller to rotate, and the slag on the adjusting screen plate is continuously turned over; Step 2: During the feed screening process, the delivery pump is started to pump the water in the water tank into the diversion pipe, and then enters the dust reduction pipe through the connecting pipe and is sprayed out through the nozzle for dust reduction treatment; Step 3. After the pre-screening is completed, start the double-headed motor to drive the winding wheel to rotate, reel in the winding rope, pull the sliding frame to move to the top of the crushing roller, control the adjustment of the screen plate through the electric telescopic rod to fully open the screen hole so that all the slag falls into the crushing roller, start the universal motor to drive the two crushing rollers to rotate in opposite directions to crush the slag. The crushed slag enters the crusher through the feeding piece for secondary crushing.

[0017] From the above, it can be seen that the grading and crushing processing device for steel slag provided by the present invention can, through the pretreatment module, screen out the steel slag particles that meet the particle size requirements before the steel slag is crushed, and directly carry out the next stage of crushing to avoid excessive crushing and improve work efficiency. At the same time, vibration is continuously generated during the screening process, and the screen surface is cleaned by a cleaning roller to avoid blockage. In addition, the fine dust generated when the steel slag is discharged and screened is subjected to dust reduction treatment through the dust reduction module, thereby improving the cleanliness of the working environment and avoiding inhalation by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a grading and crushing device for steel slag proposed by the present invention; Figure 2 This is a schematic diagram of the overall internal structure of a grading and crushing device for steel slag proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a pre-processing module of a grading and crushing processing device for steel slag proposed by the present invention; Figure 4 This is a schematic diagram of the internal structure of an installation box of a grading and crushing processing device for steel slag proposed by the present invention; Figure 5 This is a structural schematic diagram of the connecting rod frame of the pre-processing module of the grading and crushing processing device for steel slag proposed by the present invention; Figure 6 This is a schematic structural diagram of a sliding table of a grading and crushing device for steel slag proposed by the present invention; Figure 7 This is a schematic diagram of the internal structure of an installation frame of a grading and crushing processing device for steel slag proposed by the present invention; Figure 8 This is a schematic diagram of the structure of a dust reduction module of a grading and crushing processing device for steel slag proposed by the present invention; Fig. 9 This is a schematic structural diagram of the dust reduction pipe of the dust reduction module of the grading and crushing processing device for steel slag proposed in the present invention.

[0019] In the figure: 1, main frame; 2, pre-processing module; 201, double-headed motor; 202, winding wheel; 203, sliding frame; 204, installation box; 205, screen; 206, installation frame; 207, adjusting screen plate; 208, cleaning roller; 209, driving motor; 210, threaded rod; 211, impact piece; 212, sliding table; 213, connecting rod frame; 214, rotating rod; 215, gear ring; 216, rack; 217, fixed cylinder; 218, fixed piece; 219, arc rod; 220, spring; 221, sliding block; 222, movable cylinder; 223. Impact piece; 224. Winding rope; 225. Electric telescopic rod; 226. Guide rail piece; 227. Sliding piece; 228. Electric push rod; 229. Support rod; 230. Clamping piece; 231. Support rod; 3. Dust suppression module; 301. Water tank; 302. Delivery pump; 303. Diverter pipe; 304. Connecting pipe; 305. Fixed frame; 306. Dust suppression pipe; 307. Nozzle; 4. Feed hopper; 5. Universal motor; 6. Transmission wheel one; 7. Transmission belt; 8. Transmission wheel two; 9. Crushing roller; 10. Gear; 11. Feeding piece; 12. Crusher body. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] The grading and crushing device for steel slag disclosed in the present invention is mainly used in the scenario where no pre-screening treatment is performed before the steel slag is crushed, which will cause the steel slag particles that meet the particle size requirements to be over-crushed, and the uncrushed steel slag will easily clog the screen.

[0022] Reference Figure 1-Figure 9 A grading and crushing processing device for steel slag comprises a main frame 1, a pretreatment module 2 is arranged inside the main frame 1, and a feed hopper 4 is arranged on the top of the main frame 1, the main frame 1 and the feed hopper 4 are provided with the same dust reduction module 3, the bottom inner wall of the main frame 1 is fixedly connected with a crusher body 12, the pretreatment module 2 comprises a sliding frame 203, the sliding frame 203 slides on the inner wall of the main frame 1, and two symmetrical installation boxes 204 are fixedly connected to the sliding frame 203, the tops of the two installation boxes 204 are fixedly connected with the same screen 205, and the tops of the screen 205 are fixedly connected with two symmetrical installation frames 206, the dust reduction module 3 comprises a water tank 301, and the water tank 301 is fixedly connected to the top of the main frame 1.

[0023] Reference Figure 1 , Figure 3 and Figure 4A plurality of striking pieces 211 are fixedly connected to the bottom of the screen 205 at equal intervals, threaded rods 210 are movably connected to the two installation boxes 204, and a driving motor 209 is fixedly connected to the inner wall of one side of the two installation boxes 204, and the output ends of the two driving motors 209 are fixedly connected to one end of the corresponding threaded rod 210, and the outside of the two threaded rods 210 are connected to a sliding table 212 through threads.

[0024] Reference Figure 1 , Figure 5 and Figure 6 , the two sliding tables 212 are fixedly connected to the opposite side with a fixed cylinder 217, the interior of the two fixed cylinders 217 are movably connected with a movable cylinder 222, and one side of the two fixed cylinders 217 is fixedly connected with a fixing part 218, the top of the two fixing parts 218 is fixedly connected with an arc rod 219, the outer walls of the two arc rods 219 are slidably connected with sliding blocks 221, and the two sliding blocks 221 are fixedly connected to the corresponding movable cylinder 222, and the outside of the two arc rods 219 are surrounded by two springs 220, one end of the two springs 220 is fixedly connected to the corresponding sliding block 221, and the other end is fixedly connected to the corresponding fixing part 218.

[0025] Reference Figure 1 , Figure 5 and Figure 6 The two sliding tables 212 are fixedly connected to the opposite side with a connecting rod frame 213, and the two connecting rod frames 213 are provided with round holes. The same rotating rod 214 is movably connected in the two round holes. The outer wall of the rotating rod 214 is fixedly connected to a cleaning roller 208 and two gear rings 215, and the tops of the two mounting frames 206 are fixedly connected to racks 216, and the two gear rings 215 are meshed with the corresponding racks 216.

[0026] Reference Figure 1 , Figure 3 and Figure 7 The inner walls of the two mounting frames 206 are movably connected with the same adjustable screen plate 207, and the adjustable screen plate 207 slides on the top of the screen 205. The top of the screen 205 is fixedly connected with two electric telescopic rods 225, and the driving ends of the two electric telescopic rods 225 are fixedly connected to the adjustable screen plate 207.

[0027] Reference Figure 1 , Figure 3 and Figure 7The inner walls on the opposite sides of the two mounting frames 206 are movably connected with support rods 231, one end of the two support rods 231 is movably connected with clamping pieces 230, and the inner walls on the opposite sides of the two mounting frames 206 are fixedly connected with electric push rods 228 and guide rails 226, the two guide rails 226 are slidably connected with sliding pieces 227, the driving ends of the two electric push rods 228 are fixedly connected to the corresponding sliding pieces 227, the two sliding pieces 227 are movably connected with support rods 229, and the ends of the two support rods 229 away from the sliding pieces 227 are movably connected to the corresponding support rods 231.

[0028] In a specific application scenario, the screen plate 207 is pushed and pulled by the electric telescopic rod 225 to control the size of the screen holes through which the slag can pass, and the slag particles that meet the particle size requirements are screened out in advance. Then the electric push rod 228 pushes the sliding part 227, driving the support rod 231 to push the clamping part 230 to fix the position of the adjustable screen plate 207. During screening, the sliding table 212 is driven back and forth by the driving motor 209. Under the elastic action of the spring 220, the impact part 223 is continuously driven to impact the impact part 211, causing the screen 205 to vibrate continuously. At the same time, through the engagement of the tooth ring 215 and the rack 216, the rotating rod 214 drives the cleaning roller 208 to rotate, and continuously flips the slag on the adjustable screen plate 207.

[0029] Reference Figure 1 , Figure 8 and Fig. 9 The dust reduction module 3 also includes a delivery pump 302, which is fixedly connected to one side of the water tank 301, and the input end of the delivery pump 302 is fixedly connected to the water tank 301, a shunt pipe 303 is fixedly connected to the top of the main frame 1, the output end of the delivery pump 302 is fixedly connected to the shunt pipe 303, and both ends of the shunt pipe 303 are fixedly connected to connecting pipes 304.

[0030] Reference Figure 1 , Figure 8 and Fig. 9 , both sides of the feed hopper 4 are fixedly connected with fixed frames 305, and dust reduction pipes 306 are fixedly connected to the two fixed frames 305. Multiple nozzles 307 are evenly arranged on the two dust reduction pipes 306, and one end of the two connecting pipes 304 away from the diversion pipe 303 is fixedly connected to the corresponding dust reduction pipe 306.

[0031] Reference Figure 1 , Figure 8 and Fig. 9A feeding piece 11 is fixedly connected to the inner wall of the main frame 1, and two mounting holes are provided on the main frame 1, and crushing rollers 9 are movably connected in the two mounting holes, and gears 10 are fixedly connected to the outer walls of the two crushing rollers 9, and the two gears 10 are meshed with each other, and a transmission wheel 2 8 is fixedly connected to the outer wall of one of the crushing rollers 9, and a universal motor 5 is fixedly connected to one side of the main frame 1, and a transmission wheel 1 6 is fixedly connected to the output end of the universal motor 5, and the outer walls of the transmission wheel 1 6 and the transmission wheel 2 8 are slidably connected to the same transmission belt 7.

[0032] In a specific application scenario, during the feed screening process, the water in the water tank 301 is pumped into the diversion pipe 303 through the delivery pump 302, enters the dust reduction pipe 306 through the connecting pipe 304, and is sprayed out through the nozzle 307. The fine dust generated when the slag is fed and screened is treated to reduce dust, thereby maintaining the cleanliness of the working environment and preventing the staff from inhaling it.

[0033] A method for treating steel slag by graded crushing, using the steel slag graded crushing device as described above, comprises the following steps: Step 1: Before feeding, start the electric telescopic rod 225 to push and pull the adjusting screen plate 207 to control the size of the screen hole for the steel slag to pass through, and screen out the steel slag particles that meet the particle size requirements in advance to avoid excessive crushing. Then the electric push rod 228 pushes the sliding member 227, driving the support rod 231 to push the clamping member 230 to fix the position of the adjusting screen plate 207 to prevent sliding during the vibration of the screen and affect the screening effect. During screening, the sliding table 212 is reciprocated by the driving motor 209. Under the elastic action of the spring 220, the impact member 223 is continuously driven to impact the impact member 211, so that the screen 205 is continuously vibrated. At the same time, through the meshing of the toothed ring 215 and the rack 216, the rotating rod 214 drives the cleaning roller 208 to rotate, and the steel slag on the adjusting screen plate 207 is continuously flipped. Step 2: During the feed screening process, the delivery pump 302 is started to pump the water in the water tank 301 into the diversion pipe 303, and then enters the dust reduction pipe 306 through the connecting pipe 304, and is sprayed out through the nozzle 307 for dust reduction treatment; Step 3, after the pre-screening is completed, start the double-headed motor 201 to drive the winding wheel 202 to rotate, reel in the winding rope 224, pull the sliding frame 203 to move to the top of the crushing roller 9, control the electric telescopic rod 225 to adjust the screen plate 207 to fully open the screen hole, so that all the slag falls into the crushing roller 9, start the universal motor 5 to drive the two crushing rollers 9 to rotate in opposite directions, crush the slag, and the crushed slag enters the crusher through the feeding piece 11 for secondary crushing.

[0034] Working principle: Before feeding, start the electric telescopic rod 225 to push and pull the adjustable screen plate 207 to control the size of the screen hole for the slag to pass through. Then start the electric push rod 228 to push the sliding member 227, so that the sliding member 227 drives the support rod 231 to move through the support rod 229. The position of the adjustable screen plate 207 is fixed by the clamping piece 230 to prevent it from sliding during the vibration and affecting the screening effect. The poured slag falls from the feed hopper 4 onto the screen 205 and the adjustable screen plate 207, and the slag that meets the particle size requirements is The desired slag particles are screened out in advance to avoid over-crushing. The driving motor 209 is started to drive the threaded rod 210 to rotate, so that the sliding table 212 slides back and forth. When the impact member 223 is blocked by the impact member 211, the impact member 223 drives the movable cylinder member 222 to rotate, so that the sliding block 221 compresses the spring 220 to slide on the outer wall of the arc rod 219. After the impact member 223 is separated from the impact member 211, the spring 220 elastically recovers, driving the impact member 223 to impact the next impact member 211. The screen 205 is continuously vibrated by the impact, thereby increasing the screening efficiency. At the same time, the connecting rod frame 213 reciprocates with the sliding table 212. Through the meshing of the gear ring 215 and the rack 216, the rotating rod 214 drives the cleaning roller 208 to rotate, and the steel slag on the screen plate 207 is continuously turned over to avoid clogging of the screen holes. During the process, the delivery pump 302 is started to pump the water in the water tank 301 into the shunt pipe 303, and then enters the dust suppression pipe 306 through the connecting pipe 304, and is sprayed out through the nozzle 307. For dust reduction treatment, after the pre-screening is completed, the double-headed motor 201 is started to drive the winding wheel 202 to rotate, the winding rope 224 is wound, and the sliding frame 203 is pulled to move to the top of the crushing roller 9. The screen plate 207 is controlled and adjusted by the electric telescopic rod 225 to fully open the screen hole so that all the slag falls into the crushing roller 9, and the universal motor 5 is started to drive the two crushing rollers 9 to rotate in opposite directions to crush the slag. The crushed slag enters the crusher through the feeding piece 11 for secondary crushing.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A grading and crushing device for steel slag, comprising a main frame (1), characterized in that: A pre-processing module (2) is arranged inside the main frame (1), and a feed hopper (4) is arranged on the top of the main frame (1); the main frame (1) and the feed hopper (4) are provided with the same dust reduction module (3); the inner wall of the bottom of the main frame (1) is fixedly connected to a crusher body (12); the pre-processing module (2) comprises a sliding frame (203), the sliding frame (203) slides on the inner wall of the main frame (1), and two mutually symmetrical installation boxes (204) are fixedly connected to the sliding frame (203); the tops of the two installation boxes (204) are fixedly connected to the same screen (205), and the tops of the screens (205) are fixedly connected to two mutually symmetrical installation frames (206); the dust reduction module (3) comprises a water tank (301), and the water tank (301) is fixedly connected to the top of the main frame (1).

2. The grading and crushing device for steel slag according to claim 1, characterized in that: The bottom of the screen (205) is fixedly connected to a plurality of striking pieces (211) at equal intervals, the two installation boxes (204) are movably connected to threaded rods (210), and one side inner wall of the two installation boxes (204) is fixedly connected to a driving motor (209), the output ends of the two driving motors (209) are fixedly connected to one end of the corresponding threaded rod (210), and the outside of the two threaded rods (210) is threadedly connected to a sliding platform (212).

3. The grading and crushing device for steel slag according to claim 2, characterized in that: The two sliding tables (212) are fixedly connected to a fixed cylinder (217) on one side opposite to the other, the inside of the two fixed cylinders (217) are movably connected to a movable cylinder (222), and one side of the two fixed cylinders (217) is fixedly connected to a fixed member (218), the tops of the two fixed members (218) are fixedly connected to an arc-shaped rod (219), the outer walls of the two arc-shaped rods (219) are slidably connected to a sliding block (221), the two sliding blocks (221) are fixedly connected to the corresponding movable cylinder (222), and the outside of the two arc-shaped rods (219) are surrounded by two springs (220), one end of the two springs (220) is fixedly connected to the corresponding sliding block (221), and the other end is fixedly connected to the corresponding fixed member (218).

4. The grading and crushing device for steel slag according to claim 3, characterized in that: A connecting rod frame (213) is fixedly connected to the opposite side of the two sliding tables (212), and a circular hole is opened on the two connecting rod frames (213). The two circular holes are rotatably connected to the same rotating rod (214) via bearings. The outer wall of the rotating rod (214) is fixedly connected to a cleaning roller (208) and two gear rings (215), and the tops of the two mounting frames (206) are fixedly connected to racks (216), and the two gear rings (215) are meshed with the corresponding racks (216).

5. The grading and crushing device for steel slag according to claim 4, characterized in that: The inner walls of the two mounting frames (206) are movably connected to the same adjustable screen plate (207), and the adjustable screen plate (207) slides on the top of the screen (205). The top of the screen (205) is fixedly connected to two electric telescopic rods (225), and the driving ends of the two electric telescopic rods (225) are fixedly connected to the adjustable screen plate (207).

6. The grading and crushing device for steel slag according to claim 5, characterized in that: The inner walls on the opposite sides of the two installation frames (206) are movably connected to support rods (231), one end of the two support rods (231) is movably connected to a clamping piece (230), and the inner walls on the opposite sides of the two installation frames (206) are fixedly connected to electric push rods (228) and guide rails (226), the two guide rails (226) are slidably connected to sliding pieces (227), the driving ends of the two electric push rods (228) are fixedly connected to the corresponding sliding pieces (227), the two sliding pieces (227) are movably connected to support rods (229), and the ends of the two support rods (229) away from the sliding pieces (227) are movably connected to the corresponding support rods (231).

7. The grading and crushing device for steel slag according to claim 6, characterized in that: The dust reduction module (3) further comprises a delivery pump (302), the delivery pump (302) being fixedly connected to one side of the water tank (301), and the input end of the delivery pump (302) being fixedly connected to the water tank (301), a shunt pipe (303) being fixedly connected to the top of the main frame (1), the output end of the delivery pump (302) being fixedly connected to the shunt pipe (303), and connecting pipes (304) being fixedly connected to both ends of the shunt pipe (303).

8. The grading and crushing device for steel slag according to claim 7, characterized in that: Both sides of the feed hopper (4) are fixedly connected to fixed frames (305), and the two fixed frames (305) are fixedly connected to dust reduction pipes (306), and a plurality of nozzles (307) are evenly spaced on the two dust reduction pipes (306), and the ends of the two connecting pipes (304) away from the diversion pipe (303) are fixedly connected to the corresponding dust reduction pipes (306).

9. The grading and crushing device for steel slag according to claim 8, characterized in that: The inner wall of the main frame (1) is fixedly connected to a material feeding member (11), and the main frame (1) is provided with two mounting holes, in which crushing rollers (9) are rotatably connected via bearings, the outer walls of the two crushing rollers (9) are fixedly connected to gears (10), and the two gears (10) are meshed with each other, the outer wall of one of the crushing rollers (9) is fixedly connected to a second transmission wheel (8), one side of the main frame (1) is fixedly connected to a universal motor (5), the output end of the universal motor (5) is fixedly connected to a first transmission wheel (6), and the outer walls of the first transmission wheel (6) and the second transmission wheel (8) are slidably connected to the same transmission belt (7).

10. A method for treating steel slag by grading and crushing, using a device for treating steel slag by grading and crushing according to claim 9, characterized in that: The steps include: Step 1: Before feeding, the electric telescopic rod (225) is started to push and pull the adjusting screen plate (207) to control the size of the screen holes through which the steel slag can pass, and the steel slag particles that meet the particle size requirements are screened out in advance to avoid excessive crushing. Then, the electric push rod (228) pushes the sliding member (227) to drive the support rod (231) to push the clamping member (230) to fix the position of the adjusting screen plate (207) to prevent sliding during the vibration of the screen and affecting the screening effect. During screening, the sliding table (212) is driven to slide back and forth by the driving motor, and the impact member (223) is continuously driven to impact the impact member (211) under the elastic action of the spring (220), so that the screen (205) is continuously vibrated to increase the screening efficiency. At the same time, through the meshing of the toothed ring (215) and the rack (216), the rotating rod (214) drives the cleaning roller (208) to rotate, and the steel slag on the adjusting screen plate (207) is continuously flipped to avoid clogging of the screen holes. Step 2: During the feed screening process, the delivery pump (302) is started to pump the water in the water tank (301) into the diversion pipe (303), and then enters the dust reduction pipe (306) through the connecting pipe (304) and is sprayed out through the nozzle (307) to perform dust reduction treatment; Step 3: After the slag particles meeting the particle size requirements are screened, the double-headed motor (201) is started to drive the winding wheel (202) to rotate, the winding rope (224) is wound, the sliding frame (203) is pulled to move above the crushing roller (9), the screen plate (207) is controlled and adjusted by the electric telescopic rod (225) to fully open the screen hole so that all the slag falls into the crushing roller (9), the universal motor (5) is started to drive the two crushing rollers (9) to rotate in opposite directions, and the slag is crushed. The crushed slag enters the crusher through the feeding piece (11) for secondary crushing.

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