Steel slag screening device and process thereof

Abstract

The application discloses a steel slag screening device and a process thereof, and relates to the technical field of steel slag screening, which comprises a screening box, a sliding perforation is formed on the outer side of the opening end of the screening box, and a pneumatic suspension assembly is arranged on the inner side of the screening box at the sliding perforation. The steel slag screening device and the process thereof have the advantages that the steel slag is guided into the screening box, an air compressor is started, the air compressor blows out compressed gas through the air holes on the hollow arc-shaped plate, the dispersing rods have a certain separation effect on the steel slag in the process that the steel slag passes through the dispersing rods, the steel slag accumulation is avoided, the magnetic attractor below cannot collect the magnetic-attractable components, the steel slag prolongs the time of staying on the outer side of the magnetic attractor under the pneumatic action after the compressed gas is blown out, the magnetic attractor adsorption effect is improved, the compressed gas is blown, the steel slag is further separated, and the collection effect of the magnetic-attractable components in the steel slag is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel slag screening, and particularly relates to a steel slag screening device and a process thereof. BACKGROUND

[0002] Steel slag is an industrial solid waste, which is discharged from steelmaking, and is divided into converter slag, open-hearth furnace slag and electric furnace slag according to the furnace type. The steel slag is mainly composed of calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus and other oxides. In order to recycle the materials in the steel slag, the steel slag needs to be screened and collected after being crushed.

[0003] In the prior art, for some components in the steel slag that can be magnetically attracted, a magnetic attractor is generally used to adsorb the components, so as to realize the screening and separation effect. However, in the prior art, the magnetic attractor is only used to adsorb the iron, cobalt and nickel components in the steel slag during the movement of the steel slag. Some components that can be magnetically attracted are blocked by other components that cannot be magnetically attracted, and cannot be adsorbed. This results in poor magnetic attraction effect and poor steel slag screening effect, and reduces the use value of the steel slag screening device. SUMMARY

[0004] The present application discloses a steel slag screening device, which aims to solve the technical problem that the prior art steel slag screening device has poor magnetic attraction effect and poor steel slag screening effect.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] The utility model provides a kind of steel slag screening device and process, including screening box, the sliding perforation is opened in the outside of opening end of screening box, and pneumatic suspension assembly is equipped in the inside of screening box at sliding perforation, the pneumatic suspension assembly includes two hollow arc plates, and two hollow arc plates are fixedly connected to the inner wall of screening box, two hollow arc plates are below sliding perforation, the same side of two hollow arc plates is opened with communicating hole, and the inside of two communicating holes is fixedly connected with same communicating pipe, hollow arc plate away from sliding perforation is fixedly connected with support rod towards the outside of upper side, support rod is fixedly connected with annular frame towards the side of sliding perforation, annular frame is annularly distributed with dispersion rod, and the direction of dispersion rod is the center point of annular frame, the side of screening box close to hollow arc plate is fixedly connected with rack, and the top of rack is fixedly connected with air compressor, and the gas delivery end of air compressor is fixedly connected with gas delivery pipe, and the other end of gas delivery pipe is inserted into the inside of one of hollow arc plate, and the outside of two hollow arc plates towards dispersion rod is opened with air hole at equal intervals.

[0007] By being provided with pneumatic suspension assembly, by introducing steel slag into screening box, starting air compressor, air compressor is inflated with compressed gas through the air hole on hollow arc plate, in the process that steel slag passes through each dispersion rod, dispersion rod plays a certain separation effect on steel slag, to avoid that steel slag accumulation causes that the lower magnetic attracter cannot collect the magnetic attractable component in it, after compressed gas is inflated, steel slag prolongs the time of staying outside magnetic attracter under the action of pneumatic, to improve the adsorption effect of magnetic attracter, the blowing of compressed gas further separates and separates steel slag, to further improve the collection effect of magnetic attractable component in the steel slag.

[0008] In a preferred scheme, the outside of the screening box is fixedly connected with a collection frame, and the side of the screening box above the collection frame is fixedly connected with a motor plate, the top of the motor plate is fixedly connected with a drive motor one, the output shaft of the drive motor one is fixedly connected with a drive frame through a shaft coupling, and the outer side of the drive frame is annularly distributed with a motor box.

[0009] In a preferred scheme, the inside of each motor box is fixedly connected with a drive motor two, and the output shaft of the drive motor two is fixedly connected with a rotating shaft through a shaft coupling, the other end of the rotating shaft is fixedly connected with a mounting plate, and the outer side of the mounting plate is annularly distributed with a magnetic attracter.

[0010] In a preferred scheme, the outside of the collection frame is provided with a quick release assembly, and the quick release assembly includes a push-on collar and a connecting frame, and the connecting frame is fixedly connected to the outside of the collection frame.

[0011] In a preferred scheme, the connecting frame is fixedly connected with a hydraulic cylinder II on the side facing the collecting frame, and the output end of the hydraulic cylinder II is fixedly connected with a pushing block, the pushing sleeve ring is fixedly connected to the outer side of the pushing block, the guide vane is fixedly connected to the inner side of the pushing sleeve ring close to the lower side, the cross section of the guide vane is trapezoidal structure, and the inner side of the pushing sleeve ring is equally distributed with hard bristles.

[0012] By setting the quick release assembly, when the partially magnetically attractable components are collected, the driving motor I is started to rotate the magnet attractor inside the screening box to the quick release assembly, then the hydraulic cylinder II drives the pushing sleeve ring to move to the outside of the magnet attractor, at the same time, the driving motor II behind the magnet attractor is started, the magnet attractor is powered off, the hard bristles scrape off the components attached to the outside of the magnet attractor, the scraped components are guided into the collecting frame below through the guide vane, and the quick release collection of the magnetically attractable components is realized.

[0013] In a preferred scheme, the two sides of the screening box close to the top end are fixedly connected with fixed blocks, and the bottom of each of the two fixed blocks is fixedly connected with a hydraulic cylinder I, the output ends of the two hydraulic cylinders I are fixedly connected with the same blocking plate, and the blocking plate is attached to the outer side of the screening box.

[0014] In a preferred scheme, a door hole is formed in the side close to the lower side of the screening box, a box door is connected to the inner side of the door hole through a hinge, and a layered screening assembly is arranged inside the screening box close to the box door.

[0015] In a preferred scheme, the layered screening assembly comprises a fine sieve plate and a coarse sieve plate, and the inner side of the screening box is fixedly connected with four lifting sliding rails, the inner side of each lifting sliding rail is slidingly connected with two sliding blocks, the fine sieve plate is fixedly connected to the outer side of the four sliding blocks below, and the coarse sieve plate is fixedly connected to the outer side of the four sliding blocks above.

[0016] In a preferred scheme, the inner side of the screening box between the coarse sieve plate and the fine sieve plate is fixedly connected with an intermediate fixed rod, the top and bottom of the intermediate fixed rod are fixedly connected with hydraulic cylinders III, the output ends of the two hydraulic cylinders III are fixedly connected with impact rods, and the opposite sides of the two impact rods are equally fixedly connected with semicircular impact balls, and the opposite sides of the coarse sieve plate and the fine sieve plate are fixedly connected with four connecting spring rods.

[0017] By setting the layered screening assembly, after the magnetically attractable components are collected by the magnet attractor above, the steel slag falls on the coarse sieve plate below, the hydraulic cylinder III drives the semicircular impact balls on the impact rods to impact the coarse sieve plate and the fine sieve plate, the connecting spring rods are passively stretched in the process of impact, then the hydraulic cylinder III drives the impact rods to reset, the fine sieve plate and the coarse sieve plate are in a state of vibration, the screening process of the steel slag is accelerated, the double-layer screening is simultaneously realized, and the use value of the screening device is improved.

[0018] A steel slag screening process using a steel slag screening device as described above, the screening process comprising the following steps:

[0019] Step one: after the steel slag is introduced into the screening box, the air compressor is started, the air compressor blows out compressed gas through the air holes on the hollow arc plate, the dispersion rods have a certain separation effect on the steel slag during the process of the steel slag passing through the dispersion rods, after the compressed gas is blown out, the steel slag prolongs the time of staying outside the magnetic attractor under the action of the compressed gas, the magnetic attractor in the screening box is powered on, the driving motor two drives the rotation of each magnetic attractor, and the collection of the magnetic attractable components is accelerated;

[0020] Step two: start the driving motor one to rotate the magnetic attractor after adsorption in the screening box to the rapid separation assembly, then adjust the hydraulic cylinder two to drive the movement of the push ring to the outside of the magnetic attractor, at the same time, the driving motor two behind the magnetic attractor is started, the magnetic attractor is powered off, the hard bristles scrape off the components attached to the outside of the magnetic attractor, and the scraped components are introduced into the collection frame below through the flow guide piece;

[0021] Step three: the steel slag falls on the lower coarse sieve plate, the hydraulic cylinder three drives the semicircular impact ball on the impact rod to impact the coarse sieve plate and the fine sieve plate, the connecting spring rod is passively stretched in the process of impact, then the hydraulic cylinder three drives the impact rod to reset, and the fine sieve plate and the coarse sieve plate are in a state of vibration, which accelerates the screening process of the steel slag and synchronously realizes double-layer screening.

[0022] As can be seen from the above, the steel slag screening device provided by the present application has the technical effects that when the steel slag is introduced into the screening box, the air compressor is started, the air compressor blows out compressed gas through the air holes on the hollow arc plate, the dispersion rods have a certain separation effect on the steel slag during the process of the steel slag passing through the dispersion rods, the steel slag is prevented from being accumulated to cause the magnetic attractor below to be unable to collect the magnetic attractable components therein, after the compressed gas is blown out, the steel slag prolongs the time of staying outside the magnetic attractor under the action of the compressed gas, thereby improving the adsorption effect of the magnetic attractor, the compressed gas is blown to further separate the steel slag, and the collection effect of the magnetic attractable components in the steel slag is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application provides a steel slag screening device.

[0024] Figure 2 The present application provides a steel slag screening device.

[0025] Figure 3 The present application provides a steel slag screening device.

[0026] Figure 4A schematic view of a magnetic attractor and collection frame combination structure of a steel slag screening device according to the present application.

[0027] Figure 5 The overall structure of the present application is a top view. Figure 4

[0028] Figure 6 A schematic view of a quick disengagement assembly of a steel slag screening device according to the present application.

[0029] Figure 7 A schematic view of a layered screening assembly of a steel slag screening device according to the present application.

[0030] In the figure: 1, screening box; 2, hydraulic cylinder one; 3, sliding perforation; 4, box door; 5, collection frame; 6, magnetic attractor; 7, mounting plate; 8, plugging plate; 9, fixed block; 10, quick disengagement assembly; 1001, push-in collar; 1002, push-in block; 1003, connecting frame; 1004, flow guide fin; 1005, hydraulic cylinder two; 1006, hard bristles; 11, pneumatic suspension assembly; 1101, hollow arc-shaped plate; 1102, air compressor; 1103, ring-shaped frame; 1104, dispersing rod; 1105, rack; 1106, gas conveying pipe; 1107, support rod; 1108, air hole; 1109, communication pipe; 12, layered screening assembly; 1201, fine sieve plate; 1202, coarse sieve plate; 1203, lifting slide rail; 1204, sliding block; 1205, hydraulic cylinder three; 1206, semicircular impact ball; 1207, connecting spring rod; 1208, intermediate fixed rod; 1209, impact rod; 13, motor plate; 14, drive motor one; 15, drive motor two; 16, drive frame; 17, motor box; 18, rotating shaft. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0032] The steel slag screening device disclosed by the present application is mainly applied to the existing steel slag screening device in use. For some components that can be magnetically attracted in the steel slag, the components are generally adsorbed by a magnetic attractor, so as to realize the effect of screening and separation. However, the existing screening device only adsorbs the components such as iron, cobalt and nickel contained in the steel slag by the magnetic attractor during the movement of the steel slag. Some components that can be magnetically attracted are blocked by other components that cannot be magnetically attracted, and cannot be adsorbed, which causes poor magnetic attraction effect and poor steel slag screening effect.

[0033] Reference Figures 1-7 ​The utility model provides a steel slag screening device, including screening box 1, the outside of screening box 1 is close to open end and is opened sliding perforation 3, and the inside of screening box 1 is equipped with pneumatic suspension assembly 11 at sliding perforation 3, pneumatic suspension assembly 11 includes two hollow arc plate 1101, and two hollow arc plate 1101 are all fixedly connected to the inner wall of screening box 1, two hollow arc plate 1101 all are located below sliding perforation 3, and the same side of two hollow arc plate 1101 is opened and is communicated with hole, and the inside of two communication holes is fixedly connected with same communication pipe 1109, and the hollow arc plate 1101 away from sliding perforation 3 is fixedly connected with support rod 1107 towards the outside of upper side, and the side of support rod 1107 towards sliding perforation 3 is fixedly connected with annular frame 1103, and annular frame 1103 is annularly distributed with dispersing rod 1104, and the direction of dispersing rod 1104 is all the center point of annular frame 1103, and the side of screening box 1 close to hollow arc plate 1101 is fixedly connected with gantry 1105, and the top of gantry 1105 is fixedly connected with air compressor 1102, and the gas delivery end of air compressor 1102 is fixedly connected with gas delivery pipe 1106, and the other end of gas delivery pipe 1106 is inserted into the inside of one of hollow arc plate 1101, and the outside of two hollow arc plate 1101 towards dispersing rod 1104 is all opened and is communicated with hole 1108.

[0034] In a more specific application scenario, when the steel slag is introduced into the screening box 1, the air compressor 1102 is started, and the air compressor 1102 blows out compressed gas through the air holes 1108 on the hollow arc plates 1101. During the process of the steel slag passing through each dispersing rod 1104, the dispersing rod 1104 has a certain separation effect on the steel slag, which avoids the accumulation of the steel slag causing the magnetic attractor 6 below to be unable to collect the magnetically attractable components. After the compressed gas is blown out, the steel slag prolongs the time of staying outside the magnetic attractor 6 under the action of the compressed gas, thereby improving the adsorption effect of the magnetic attractor 6. The blowing of the compressed gas further separates and disrupts the steel slag, thereby further improving the collection effect of the magnetically attractable components in the steel slag.

[0035] Referring to Figure 1 , Figure 4 and Figure 5 , in a preferred embodiment, the outside of the screening box 1 is fixedly connected with the collecting frame 5, and the side of the screening box 1 above the collecting frame 5 is fixedly connected with the motor plate 13. The top of the motor plate 13 is fixedly connected with the drive motor one 14. The output shaft of the drive motor one 14 is fixedly connected with the drive frame 16 through a shaft coupling. The outside of the drive frame 16 is annularly distributed with the motor box 17. The inside of each motor box 17 is fixedly connected with the drive motor two 15. The output shaft of the drive motor two 15 is fixedly connected with the rotating shaft 18 through a shaft coupling. The other end of the rotating shaft 18 is fixedly connected with the mounting plate 7. The outside of the mounting plate 7 is annularly distributed with the magnetic attractor 6. The magnetic attractor 6 inside the screening box 1 is located between the hollow arc plate 1101 and the dispersing rod 1104.

[0036] With reference to Figure 1 , Figure 4 and Figure 6 , in a preferred embodiment, the outer side of the collecting frame 5 is provided with a quick release assembly 10, and the quick release assembly 10 comprises a propelling collar 1001 and a connecting frame 1003, the connecting frame 1003 is fixedly connected to the outer side of the collecting frame 5, the side of the connecting frame 1003 facing the collecting frame 5 is fixedly connected with a hydraulic cylinder two 1005, and the output end of the hydraulic cylinder two 1005 is fixedly connected with a propelling block 1002, the propelling collar 1001 is fixedly connected to the outer side of the propelling block 1002, the inner side of the propelling collar 1001 close to the lower side is fixedly connected with a flow guide vane 1004, the cross section of the flow guide vane 1004 is trapezoidal structure, and the inner side of the propelling collar 1001 is equidistantly distributed with hard bristles 1006.

[0037] With reference to Figure 1 and Figure 2 , in a preferred embodiment, the two sides of the screening box 1 close to the top are fixedly connected with a fixed block 9, and the bottom of each of the two fixed blocks 9 is fixedly connected with a hydraulic cylinder one 2, the output ends of the two hydraulic cylinder ones 2 are fixedly connected with the same blocking plate 8, and the blocking plate 8 is attached to the outer side of the screening box 1.

[0038] With reference to Figure 1 , in a preferred embodiment, the side of the screening box 1 close to the lower side is provided with a door hole, and the inner side of the door hole is connected with a box door 4 through a hinge, and the inside of the screening box 1 close to the box door 4 is provided with a layered screening assembly 12.

[0039] With reference to Figure 1 , Figure 2 and Figure 7 , in a preferred embodiment, the layered screening assembly 12 comprises a fine sieve plate 1201 and a coarse sieve plate 1202, and the inner side of the screening box 1 is fixedly connected with four lifting slide rails 1203, the inside of each of the four lifting slide rails 1203 is slidingly connected with two sliding blocks 1204, the outer side of the four sliding blocks 1204 located at the lower side is fixedly connected with the fine sieve plate 1201, the outer side of the four sliding blocks 1204 located at the upper side is fixedly connected with the coarse sieve plate 1202, the inner side of the screening box 1 between the coarse sieve plate 1202 and the fine sieve plate 1201 is fixedly connected with an intermediate fixed rod 1208, the top and bottom of the intermediate fixed rod 1208 are fixedly connected with a hydraulic cylinder three 1205, the output ends of the two hydraulic cylinder threes 1205 are fixedly connected with an impact rod 1209, and the opposite sides of the two impact rods 1209 are equidistantly fixedly connected with a semicircular impact ball 1206, and the opposite sides of the coarse sieve plate 1202 and the fine sieve plate 1201 are fixedly connected with four connecting spring rods 1207.

[0040] Need to explain, in through the magnetic attraction device 6 above the magnetic attraction component collection after the steel slag falls into the lower coarse sieve plate 1202, adjust the hydraulic cylinder three 1205 drive impact rod 1209 on the semicircle impact ball 1206 to the coarse sieve plate 1202 and fine sieve plate 1201 impact, impact in the process of passive stretching, then the hydraulic cylinder three 1205 drive impact rod 1209 reset, fine sieve plate 1201 and coarse sieve plate 1202 in the state of shock, accelerate the screening process of steel slag, synchronous realization double layer screening, improve the use value of the screening device.

[0041] A kind of steel slag screening process, using as described above according to a kind of steel slag screening device, screening process includes the following steps:

[0042] Step one: in the steel slag is introduced into screening box 1, start air compressor 1102, air compressor 1102 passes through the air hole 1108 on hollow arc plate 1101 compressed gas is drummed out, steel slag passes through each dispersion rod 1104, dispersion rod 1104 has certain separation effect to steel slag, after compressed gas is drummed out, steel slag is under the action of pneumatic, prolongs the time of magnetic attraction device 6 outside, magnetic attraction device 6 in screening box 1 is electrified, drive motor two 15 drive each magnetic attraction device 6 rotates, accelerates the collection of magnetic attraction component;

[0043] Step two: start drive motor one 14 and rotate magnetic attraction device 6 after adsorption in screening box 1 to fast disengagement assembly 10, then adjust hydraulic cylinder two 1005 drive propelling collar 1001 moves to the outside of the magnetic attraction device 6, at the same time, drive motor two 15 behind the magnetic attraction device 6 is started, the magnetic attraction device 6 is powered off, hard bristle 1006 is scraped to the component attached to the outside of the magnetic attraction device 6, and the scraped component is guided into the lower collecting frame 5 by flow guide piece 1004;

[0044] Step three: steel slag falls into the lower coarse sieve plate 1202, adjust the hydraulic cylinder three 1205 drive impact rod 1209 on the semicircle impact ball 1206 to the coarse sieve plate 1202 and fine sieve plate 1201 impact, impact in the process of passive stretching, then the hydraulic cylinder three 1205 drive impact rod 1209 reset, fine sieve plate 1201 and coarse sieve plate 1202 in the state of shock, accelerate the screening process of steel slag, synchronous realization double layer screening.

[0045] The above, only for the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme of the present application and the invention concept equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A steel slag screening device comprising a screening box (1), characterized in that, The screening box (1) is provided with a sliding hole (3) on the outer side close to the opening end, and a pneumatic suspension assembly (11) is arranged on the inner side of the screening box (1) at the sliding hole (3). The pneumatic suspension assembly (11) comprises two hollow arc-shaped plates (1101), and the two hollow arc-shaped plates (1101) are fixedly connected to the inner wall of the screening box (1). The two hollow arc-shaped plates (1101) are located below the sliding hole (3), and the same side of the two hollow arc-shaped plates (1101) is provided with a communication hole. The same communication hole is fixedly connected with a same communication pipe (1109). The hollow arc-shaped plate (1101) away from the sliding hole (3) is fixedly connected with a support rod (1107) on the outer side facing upward. The support rod (1107) is fixedly connected with a ring-shaped frame (1103) on the side facing the sliding hole (3). The ring-shaped frame (1103) is annularly provided with a plurality of dispersion rods (1104), and the dispersion rods (1104) are directed to the center point of the ring-shaped frame (1103). The screening box (1) is fixedly connected with a rack (1105) close to one side of the hollow arc-shaped plate (1101), and the top of the rack (1105) is fixedly connected with an air compressor (1102). The air outlet end of the air compressor (1102) is fixedly connected with a gas conveying pipe (1106), and the other end of the gas conveying pipe (1106) is inserted into one of the hollow arc-shaped plates (1101). The outer side of the two hollow arc-shaped plates (1101) facing the dispersion rods (1104) is provided with a plurality of air holes (1108) at equal intervals. The outer side of the screening box (1) is fixedly connected with a collecting frame (5), and one side of the screening box (1) above the collecting frame (5) is fixedly connected with a motor plate (13). The top of the motor plate (13) is fixedly connected with a driving motor (14), and the output shaft of the driving motor (14) is fixedly connected with a driving frame (16) through a shaft coupling. The outer side of the driving frame (16) is annularly provided with a plurality of motor boxes (17). The outer side of the collecting frame (5) is provided with a quick release assembly (10), and the quick release assembly (10) comprises a propelling sleeve ring (1001) and a connecting frame (1003). The connecting frame (1003) is fixedly connected to the outer side of the collecting frame (5). The side of the connecting frame (1003) facing the collecting frame (5) is fixedly connected with a hydraulic cylinder (1005), and the output end of the hydraulic cylinder (1005) is fixedly connected with a propelling block (1002). The propelling sleeve ring (1001) is fixedly connected to the outer side of the propelling block (1002). The inner side of the propelling sleeve ring (1001) close to the lower side is fixedly connected with a flow guide vane (1004). The cross section of the flow guide vane (1004) is in trapezoidal structure. The inner side of the propelling sleeve ring (1001) is provided with a plurality of hard bristles (1006) at equal intervals. The inner side of each motor box (17) is fixedly connected with a driving motor two (15), the output shaft of the driving motor two (15) is fixedly connected with a rotating shaft (18) through a shaft coupling, the other end of the rotating shaft (18) is fixedly connected with a mounting plate (7), the outer side of the mounting plate (7) is annularly distributed with magnetic attractors (6), the magnetic attractors (6) inside the screening box (1) are located between the hollow arc-shaped plate (1101) and the dispersion rods (1104); The two sides of the screening box (1) near the top are fixedly connected with fixed blocks (9), the bottoms of the two fixed blocks (9) are fixedly connected with hydraulic cylinders one (2), the output ends of the two hydraulic cylinders one (2) are fixedly connected with the same blocking plate (8), and the blocking plate (8) is attached to the outer side of the screening box (1); A door hole is formed in the side of the screening box (1) near the lower portion, a box door (4) is connected to the inner side of the door hole through a hinge, and a layered screening assembly (12) is arranged inside the screening box (1) near the box door (4); The layered screening assembly (12) comprises fine screening plates (1201) and coarse screening plates (1202), the inner side of the screening box (1) is fixedly connected with four lifting slide rails (1203), the inner side of each lifting slide rail (1203) is slidingly connected with two sliding blocks (1204), the fine screening plates (1201) are fixedly connected to the outer sides of the four sliding blocks (1204) at the lower portion, and the coarse screening plates (1202) are fixedly connected to the outer sides of the four sliding blocks (1204) at the upper portion; The inner side of the screening box (1) between the coarse screening plates (1202) and the fine screening plates (1201) is fixedly connected with an intermediate fixed rod (1208), the top and bottom of the intermediate fixed rod (1208) are fixedly connected with hydraulic cylinders three (1205), the output ends of the two hydraulic cylinders three (1205) are fixedly connected with impact rods (1209), and the opposite sides of the two impact rods (1209) are fixedly connected with semicircular impact balls (1206) at equal distances, and the opposite sides of the coarse screening plates (1202) and the fine screening plates (1201) are fixedly connected with four connecting spring rods (1207).

2. A steel slag screening process using a steel slag screening device as claimed in claim 1, characterized by, The screening process comprises the following steps: In step one, the steel slag is introduced into the screening box (1), the air compressor (1102) is started, the air compressor (1102) blows out compressed gas through the air holes (1108) on the hollow arc-shaped plate (1101), the dispersion rods (1104) have a certain separation effect on the steel slag during the process of the steel slag passing through the dispersion rods (1104), after the compressed gas is blown out, the steel slag prolongs the time of staying outside the magnetic attractors (6) under the action of the air pressure, the magnetic attractors (6) in the screening box (1) are electrified, the driving motor two (15) drives the magnetic attractors (6) to rotate, and the collection of the magnetic components is accelerated. Step two: start the drive motor one (14) to rotate the magnetic attraction device (6) in the screening box (1) to the rapid release assembly (10), and then adjust the hydraulic cylinder two (1005) to drive the push sleeve ring (1001) to move to the outside of the magnetic attraction device (6), at the same time, the drive motor two (15) behind the magnetic attraction device (6) is started, the magnetic attraction device (6) is powered off, the hard bristle (1006) scrapes the components attached to the outside of the magnetic attraction device (6), and the scraped components are guided into the collection frame (5) below through the flow guide piece (1004); Step three: the steel slag falls on the coarse sieve plate (1202) below, the hydraulic cylinder three (1205) drives the semicircular impact ball (1206) on the impact rod (1209) to impact the coarse sieve plate (1202) and the fine sieve plate (1201), and the connecting spring rod (1207) is passively stretched in the process of impact, so that the fine sieve plate (1201) and the coarse sieve plate (1202) are in a state of vibration after the hydraulic cylinder three (1205) drives the impact rod (1209) to reset, which accelerates the screening process of the steel slag and synchronously realizes double-layer screening.

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