Steel slag final grinding device and using method thereof

Abstract

The invention relates to the technical field of grinding, and discloses a steel slag final grinding device and a using method thereof. A grader is installed on the top face of the equipment body, a feeding pipe fitting is installed on the left end face of the equipment body, an air heater is installed at the bottom of the equipment body, a hydraulic drive mechanical arm penetrates through the equipment body, a grinding roller is installed at the tail end of the hydraulic drive mechanical arm, and an inspection opening assembly is installed on the front end face of the equipment body. A protective net cover is arranged at the bottom of the grader, a sweeping piece is connected to the protective net cover in a clamped mode, a threaded opening is formed in the bottom of the grader, and a protective piece is connected to the interior of the threaded opening through threads. And two pre-crushing parts are mounted in the feeding pipe fitting. In the using process, after steel slag is put on the knocking plate, the steel slag can be pre-crushed through the knocking plate and the spherical structure block on the top surface, the final grinding efficiency is improved, the grinding time is shortened, and the problem that the steel slag final grinding device is difficult to pre-crush to improve the efficient energy-saving performance is solved.

Description

Technical Field

[0001] The present invention relates to the field of grinding technology, and in particular to a steel slag final grinding device and a use method thereof. Background Art

[0002] In the process of steel smelting, steel slag is produced in large quantities as the main by-product. It has a complex composition and is rich in silicates, iron oxides, etc. After proper treatment, it can be widely used in the production of building materials such as cement and concrete, turning waste into treasure and realizing the secondary utilization of resources. At present, the final grinding process of steel slag mostly relies on equipment such as ball mills and vertical mills, but these traditional equipment have exposed many disadvantages in actual operation:

[0003] First, the grinding efficiency is extremely low. The lengthy grinding time not only limits the production capacity, but also makes it difficult to improve the production efficiency and pre-crush to improve the high-efficiency and energy-saving performance. Secondly, the protective cover of the classifier is in a high-speed rotating state. The powder is graded and screened. Larger particles are easily stuck in the protective cover and cannot fall off, resulting in a gradual decrease in the grading efficiency. Moreover, the feed pipe is set obliquely, and the top surface is prone to accumulation of unground steel slag, resulting in incomplete grinding. In addition, the high hardness and strong abrasiveness of steel slag pose severe challenges to traditional grinding devices. During the grinding process, equipment components are frequently subjected to strong wear and tear by steel slag, resulting in serious wear and tear of the equipment, a significant increase in the frequency of maintenance, and a significant shortening of the equipment's service life, further increasing the production and operation costs. During operation, when checking the internal operating status of the equipment, it is difficult not to be affected by wind vortices, and the flying dust affects the line of sight and is not environmentally friendly.

[0004] In summary, it is of vital practical significance to develop a steel slag final grinding device that is efficient and energy-saving, can peel off particles stuck in the classifier protective cover, can grind completely, has excellent wear resistance, and does not fly out powder when checking the operating status. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a steel slag final grinding device and a method of using the same, which can achieve high efficiency and energy saving, can peel off the particles stuck in the classifier protective cover, can grind completely with excellent wear resistance and can check the operating status without flying out powder.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A slag final grinding device comprises an equipment body; a classifier is installed on the top surface of the equipment body, a feed pipe is installed on the left end surface of the equipment body, a hot air blower is installed on the bottom of the equipment body, and hydraulically driven mechanical arms are installed on the left and right sides of the outside of the equipment body, the hydraulically driven mechanical arms penetrate the equipment body and grinding rollers are installed at the ends, and an inspection port assembly is installed on the front end surface of the equipment body; a ground protection mesh cover is arranged at the bottom of the classifier, a sweeping piece is clamped on the protection mesh cover, and a threaded opening is opened at the bottom of the classifier, and a protective piece is connected to the inside of the threaded opening through a thread; two pre-crushing pieces are installed inside the feed pipe, and a knocking piece is arranged on the top surface of the feed pipe; the inspection port assembly comprises a fixed window frame and a push-pull plate, the front end surface of the fixed window frame is fixedly connected to a fixed clip strip, a transverse groove is opened in the fixed clip strip, and a rack plate fixedly connected to the rear end surface of the push-pull plate is clamped inside the transverse groove.

[0008] As a further technical solution of the present invention, a knocking plate is fixedly connected to the pre-crushing part, the top surface of the knocking plate is provided with a protruding spherical structural block, the top surface of the knocking plate is welded with a connecting plate, a water collecting tank is installed on the back of the knocking plate, the interior of the water collecting tank is filled with liquid, and a connecting strip is provided at the bottom of the water collecting tank, the connecting strip is connected to the connecting plate through a bolt assembly, and a plugging cap is buckled on the top surface of the bolt assembly, the top surface of the plugging cap is flush with the top surface of the connecting strip, and rollable balls are embedded in the front and rear inner walls of the water collecting tank, and the balls are stuck in the annular groove on the inner wall of the feed pipe.

[0009] As a further technical solution of the present invention, a reinforcement rod is inserted between two adjacent support frames, an insertion rod is provided at one end of the reinforcement rod, and a vertical slot is opened at the other end of the reinforcement rod. The top surface of the slot has arc-shaped structures on both sides, and an insertion block is inserted inside the slot. The insertion block is inserted in the rectangular hole opened inside the insertion rod, and the top surface of the insertion block is flush with the top surface of the reinforcement rod.

[0010] As a further technical solution of the present invention, the inspection port assembly also includes a transparent film, a fixed-axis gear is rotatably clamped in the transverse groove of the fixed card strip, the fixed-axis gear is meshed and connected with the rack plate on the back of the push-pull plate, a magnetic strip is embedded in the right end of the rack plate, when the push-pull plate is located at the rightmost position, the magnetic strip is adsorbed on the fixed window frame, the front end surface of the push-pull plate is fixedly connected to the fixed plate, the fixed-axis gear is connected to the other end of the transparent film, and a spring box with a built-in spring is installed on the upper and lower sides of the reel of the transparent film, and the spring is connected to the end of the transparent film.

[0011] As a further technical solution of the present invention, the knocking piece is rotatably connected to the top surface of the feed pipe through an axis, and a knocking rod is integrally formed on the left end surface of the knocking piece. When the knocking piece is located at the uppermost position, the knocking rod fits with the fixed block.

[0012] As a further technical solution of the present invention, a feeding port is arranged at the top of the feeding pipe, a shielding cloth is connected to the bottom of the feeding port, a fixing block is fixedly welded to the top surface of the feeding pipe, the fixing block is vertically established and located inside the equipment body, and a dial wheel is clamped inside the feeding pipe through an axis rotation.

[0013] As a further technical solution of the present invention, the center of the sweeping piece is a circular hole structure, the lowest movable position of the sweeping piece is lower than the lowest height of the knocking piece, and the highest movable position of the sweeping piece is lower than the highest height of the knocking piece, a vertical circular hole is opened inside the protective piece, and the protective piece has an inverted cone structure.

[0014] As a further technical solution of the present invention, a support frame is set up at the bottom of the equipment body, a grinding disc is arranged at the bottom of the equipment body, the bottom of the grinding disc is coaxially connected with the driving shaft of the driving motor, the driving motor is installed on the support frame, and the hot air blower is installed on the top of the support frame, the air inlet of the hot air blower is located outside the equipment body, and the air outlet duct of the hot air blower is an arc structure and the air outlet is located inside the equipment body.

[0015] A method for using a steel slag final grinding device comprises the following steps:

[0016] S1: Start the hot air blower through the external circuit control end, introduce the hot air from the air inlet and finally blow it into the main body of the equipment in a vortex shape;

[0017] S2: The slag is fed into the feeding port through the feeder, and the slag is buffered onto the thumbwheel through the shielding cloth. The thumbwheel rotates under the gravity of the slag and throws the slag downward to the knocking plate. The slag can be pre-crushed by the knocking plate and the spherical structure block on the top surface;

[0018] S3: Use the grinding roller and grinding disc to grind the steel slag into final powder;

[0019] S4: Start the classifier. Under the action of centrifugal force and the hot air blown by the hot air blower, the sweeper rotates synchronously with the classifier and moves upward. After moving upward, the knocking piece flips upward and knocks on the fixed block. After knocking, the knocking piece falls back and moves the sweeper downward, so that the slag stuck in the protective cover of the classifier falls back.

[0020] S5: The qualified steel slag powder is discharged after being screened by the classifier.

[0021] The beneficial effects of the present invention are:

[0022] Firstly, during the use of the present invention, after the steel slag is put onto the striking plate, the steel slag can be pre-crushed by the striking plate and the spherical structural block on the top surface, thereby improving the efficiency of final grinding and shortening the grinding time;

[0023] Secondly, when the present invention is in use, after the classifier is started, the sweeping piece is caused to rotate synchronously with the classifier and move upwards due to the centrifugal force and the hot air blown by the hot air blower, and after moving upwards, the knocking piece is turned upwards, and the knocking piece will fall back after turning over, thereby moving the sweeping piece downwards, and so on, so that the sweeping piece moves up and down on the protective cover of the classifier, and the steel slag stuck in the protective cover of the classifier can be peeled off, and finally falls back from the round hole in the middle of the sweeping piece to continue grinding;

[0024] Thirdly, after the knocking piece is pushed upward by the sweeping piece, the knocking rod knocks against the fixed block, thereby vibrating the feed pipe once, shaking off the steel slag powder accumulated on the top surface of the feed pipe. After the knocking piece is at the top, it falls down under its own gravity, and the bottom surface of the knocking piece knocks against the top surface of the feed pipe again, shaking off the steel slag powder accumulated on the top surface of the feed pipe again, ensuring the completeness of the final grinding process and reducing the unground steel slag.

[0025] Fourthly, the spiral groove can increase the surface roughness of the grinding roller, increase the grinding force, and enhance the wear resistance;

[0026] Fifth, after pinching the fixed plate and pulling the push-pull plate to the left, the rack plate is driven to move synchronously, and the fixed-axis gear is driven to rotate, so that the transparent film can be unfolded, and the spring is wound to pull the transparent film flat, so that the operation status inside the equipment body can be checked, and at the same time, it can be ensured that no slag powder flies out. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the main body of the device of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the main body of the device of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the grinding disc of the present invention;

[0030] Figure 4 It is a schematic diagram of the expansion of the inspection port assembly of the present invention;

[0031] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 6 It is a cross-sectional development schematic diagram of the feed pipe fitting of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the pre-crushed part of the present invention;

[0034] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at B in the middle;

[0035] Fig. 9It is a schematic diagram of the structure of the sweeping member and the protective member of the present invention;

[0036] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at D in the middle;

[0037] Fig.11 It is a schematic diagram of the unfolded structure between the support frame and the reinforcement rod of the present invention;

[0038] Fig.12 for Fig.11 Schematic diagram of the enlarged structure at point C in the middle.

[0039] Reference numerals in the figure: 1, equipment body; 101, support frame; 102, grinding disc; 103, air inlet; 1011, reinforcement rod; 10111, insertion rod; 10112, insertion block;

[0040] 2. Feed pipe; 201. Feeding port; 2011. Shielding cloth; 202. Fixing block; 203. Drag wheel;

[0041] 3. Pre-crushed parts; 301. knocking plate; 3011. connecting plate; 302. water collecting box; 3021. plugging cap; 3022. ball bearing;

[0042] 4. striking piece; 401. striking rod;

[0043] 5. Scan the documents;

[0044] 6. Protective parts;

[0045] 7. Inspection port assembly; 71. Fixed window frame; 7101. Fixed clip strip; 71011. Fixed axis gear; 72. Push-pull plate; 7201. Fixed plate; 7202. Rack plate; 73. Transparent film; 7301. Scroll. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please refer to the attached Figure 1 To Attachment Fig.12A steel slag final grinding device comprises an equipment body 1; a classifier is installed on the top surface of the equipment body 1, a feed pipe 2 is installed on the left end surface of the equipment body 1, a hot air blower is installed on the bottom of the equipment body 1, and hydraulically driven mechanical arms are installed on the left and right sides of the outside of the equipment body 1, the hydraulically driven mechanical arms penetrate the equipment body 1 and grinding rollers are installed at the ends, and an inspection port assembly 7 is installed on the front end surface of the equipment body 1; a protective mesh cover is arranged at the bottom of the classifier, a sweeping piece 5 is clamped on the protective mesh cover, and a threaded opening is provided at the bottom of the classifier, and a protective piece 6 is connected to the inside of the threaded opening through a thread; two pre-crushing pieces 3 are installed inside the feed pipe 2, and a knocking piece 4 is arranged on the top surface of the feed pipe 2; the inspection port assembly 7 comprises a fixed window frame 71 and a push-pull plate 72, the front end surface of the fixed window frame 71 is fixedly connected with a fixed card strip 7101, a transverse groove is provided in the fixed card strip 7101, and a rack plate 7202 fixedly connected to the rear end surface of the push-pull plate 72 is clamped inside the transverse groove.

[0049] Please refer to the attached Figure 1 and attached Figure 2 In a preferred embodiment, a support frame 101 is provided at the bottom of the equipment body 1, a grinding disc 102 is provided at the bottom of the equipment body 1, a driving shaft of a driving motor is coaxially connected to the bottom of the grinding disc 102, the driving motor is mounted on the support frame 101, and a hot air blower is mounted on the top of the support frame 101, an air inlet 103 of the hot air blower is located outside the equipment body 1, and an air outlet duct of the hot air blower is an arc-shaped structure and an air outlet is located inside the equipment body 1. After the hot air blower is started by an external circuit control end, the air inlet 103 is connected to a machine pump to blow hot air into the interior of the equipment body 1, so that the steel slag that has been ground into powder can be blown upward, and the steel slag powder can be obtained by graded filtration through a classifier;

[0050] Specifically, the air outlet of the hot air blower is located inside the equipment body 1. Through the arc-shaped air outlet duct design, the hot air can be blown out in a vortex manner inside the equipment body 1, thereby forming a vortex, thereby improving the efficiency of sending powder upward, and at the same time, the steel slag thrown from the feed pipe 2 can be concentrated on the top surface of the grinding disc 102 to ensure the grinding efficiency.

[0051] Please refer to the attached Fig.11 and attached Fig.12In a preferred embodiment, a reinforcing rod 1011 is inserted between two adjacent support frames 101, and an insertion rod 10111 is provided at one end of the reinforcing rod 1011, and a vertical slot is provided at the other end of the reinforcing rod 1011, and both sides of the top surface of the slot are arc-shaped structures, and an insertion block 10112 is inserted inside the slot, and the insertion block 10112 is inserted into the rectangular hole provided inside the insertion rod 10111, and the top surface of the insertion block 10112 is flush with the top surface of the reinforcing rod 1011, and the insertion rod 10111 is inserted into another perpendicular reinforcement rod 1011 slot, and the insertion block 10112 is inserted into the reinforcement rod 1011 slot and the rectangular hole of the insertion rod 10111, thereby completing the assembly of the reinforcement rod 1011;

[0052] Furthermore, during the final grinding process of the equipment body 1, the vibration caused by the motor and other components causes the support frame 101 to shake, but the reinforcement rod 1011 can reinforce the support frame 101 while achieving the shaking without falling apart through the mortise and tenon structure, and the arc structure on the top surface of the slot makes it easy to remove the insert block 10112, which is convenient for maintenance or replacement.

[0053] Please refer to the attached Figure 2 In a preferred embodiment, a spiral groove is provided on the surface of the grinding roller, and the surface of the grinding roller is in contact with the top surface of the grinding disc 102. The spiral groove can increase the surface roughness of the grinding roller, increase the grinding force, and enhance the wear resistance.

[0054] Please refer to the attached Fig.10 In a preferred embodiment, the knocking member 4 is connected to the top surface of the feed pipe 2 by an axial rotation, and a knocking rod 401 is integrally formed on the left end surface of the knocking member 4. When the knocking member 4 is located at the uppermost position, the knocking rod 401 fits with the fixed block 202. When the knocking member 4 is pushed upward by the sweeping member 5, the knocking rod 401 knocks the fixed block 202, thereby vibrating the feed pipe 2 once and shaking off the steel slag powder accumulated on the top surface of the feed pipe 2.

[0055] Furthermore, when the knocking piece 4 is at the topmost position, its own gravity will push the sweeping piece 5 down, and the bottom surface of the knocking piece 4 will hit the top surface of the feed pipe 2 again, thereby shaking off the steel slag powder accumulated on the top surface of the feed pipe 2 again, ensuring the completeness of the final grinding process and reducing the unground steel slag.

[0056] Please refer to the attached Figure 4 and attached Figure 5In a preferred embodiment, the inspection port assembly 7 further includes a transparent film 73, a fixed axis gear 71011 is rotatably connected in the transverse groove of the fixed card strip 7101, the fixed axis gear 71011 is meshed and connected with the rack plate 7202 on the back of the push-pull plate 72, a magnetic strip is embedded in the right end of the rack plate 7202, when the push-pull plate 72 is located at the rightmost position, the magnetic strip is adsorbed on the fixed window frame 71, the front end surface of the push-pull plate 72 is fixedly connected with the fixed plate 7201, and the fixed axis gear 71011 The other end of the transparent film 73 is connected to the winding shaft 7301 of the transparent film 73. The winding shaft 7301 of the transparent film 73 is provided with a spring box with a built-in spring on both sides. The spring is connected to the end of the transparent film 73. After pinching the fixed plate 7201 and pulling the push-pull plate 72 to move to the left, the rack plate 7202 is driven to move synchronously, and the fixed axis gear 71011 is driven to rotate, so that the transparent film 73 can be unfolded. The winding spring pulls the transparent film 73 to be flattened, and the operation status inside the equipment body 1 can be checked, and at the same time, it can be ensured that no slag powder flies out.

[0057] Furthermore, after the push-pull plate 72 is pushed back to the right, the fixed axis gear 71011 is driven to rotate through the rack plate 7202, so that the transparent film 73 is wound, and at the same time, the end of the spring is stretched and extended to reduce the impact of particles on the transparent film 73 during grinding inside the equipment body 1, thereby extending the service life.

[0058] Please refer to the attached Figure 6 In a preferred embodiment, a feeding port 201 is provided at the top of the feeding pipe 2, a shielding cloth 2011 is connected to the bottom of the feeding port 201, a fixing block 202 is fixedly welded to the top surface of the feeding pipe 2, the fixing block 202 is vertically set up and located inside the equipment body 1, a thumbwheel 203 is connected to the inside of the feeding pipe 2 through an axial rotation, when the steel slag is fed into the feeding port 201, the shielding cloth 2011 buffers the steel slag onto the thumbwheel 203, the thumbwheel 203 rotates under the gravity of the steel slag and feeds the steel slag downward, and the shielding cloth 2011 can avoid dust inside the equipment body 1;

[0059] Preferably, after the steel slag is fed into the feed pipe 2, the steel slag can be quantitatively and evenly fed downward by the thumbwheel 203, and after being fed onto the pre-crushing member 3, it can be pre-crushed, thereby ensuring that the fed steel slag is in small pieces and fed in equal and uniform amounts.

[0060] Please refer to the attached Fig. 9In a preferred embodiment, the center of the sweeping piece 5 is a circular hole structure, the lowest movable position of the sweeping piece 5 is lower than the lowest height of the knocking piece 4, and the highest movable position of the sweeping piece 5 is lower than the highest height of the knocking piece 4. A vertical circular hole is opened inside the protective piece 6, and the protective piece 6 is an inverted cone structure. After starting the classifier, the sweeping piece 5 is subjected to the centrifugal force and the hot air blown out by the hot air blower, so that the sweeping piece 5 will rotate synchronously with the classifier and move upward, and after moving upward, it will push the knocking piece 4 to flip upward, and the knocking piece 4 will fall back after flipping, thereby pushing the sweeping piece 5 to move downward, and so on, so that the sweeping piece 5 moves back and forth up and down on the protective cover of the classifier, which can peel off the steel slag stuck in the protective cover of the classifier, and finally fall back downward from the circular hole in the middle of the sweeping piece 5 and the circular hole inside the protective piece 6, while at the same time increasing the protection effect on the bottom of the classifier.

[0061] Please refer to the attached Figure 6 To Attachment Figure 8 In a preferred embodiment, a knocking plate 301 is fixedly connected to the pre-crushing member 3, a protruding spherical structural block is arranged on the top surface of the knocking plate 301, a connecting plate 3011 is welded on the top surface of the knocking plate 301, a water collecting tank 302 is installed on the back of the knocking plate 301, the inside of the water collecting tank 302 is filled with liquid, and a connecting strip is arranged at the bottom of the water collecting tank 302, the connecting strip is connected to the connecting plate 3011 through a bolt assembly, and a plugging cap 3021 is buckled on the top surface of the bolt assembly, and the top surface of the plugging cap 3021 is flush with the top surface of the connecting strip. The inner walls of the front and rear sides of the water collecting box 302 are embedded with rolling balls 3022, and the balls 3022 are stuck in the annular grooves on the inner wall of the feeding pipe 2. When the steel slag is put onto the knocking plate 301, the steel slag can be pre-crushed by the knocking plate 301 and the spherical structure block on the top surface. At the same time, the steel slag pushes the knocking plate 301 downward to rotate. After the knocking plate 301 rotates to the lowest point, the liquid inside the water collecting box 302 on the back of the knocking plate 301 at the other radial end falls back, driving the pre-crushing part 3 to continue to rotate, so as to maintain the continuity of rotation;

[0062] Specifically, the ball bearings 3022 slide in the annular groove on the inner wall of the feed pipe 2 , which can reduce friction and increase the rotational axial positioning of the pre-crushed component 3 .

[0063] Working principle of the present invention:

[0064] First, the hot air blower is started through the external circuit control end to blow hot air into the interior of the equipment body 1, and then the steel slag to be ground is put into the feeding port 201 through the feeder, and the steel slag is buffered onto the thumbwheel 203 through the shielding cloth 2011. The thumbwheel 203 rotates under the gravity of the steel slag to feed the steel slag downward;

[0065] After the steel slag is placed on the striking plate 301, the steel slag can be pre-crushed by the striking plate 301 and the spherical structural blocks on the top surface.

[0066] When the classifier is started again, the sweeping piece 5 will rotate synchronously with the classifier and move upwards due to the centrifugal force and the hot air blown by the hot air blower. After moving upwards, it will push the knocking piece 4 to flip upwards, and the knocking piece 4 will fall back after flipping, thereby pushing the sweeping piece 5 to move downwards, and so on, so that the sweeping piece 5 moves up and down on the protective cover of the classifier, and the steel slag stuck in the protective cover of the classifier can be peeled off, and finally fall back downwards from the round hole in the middle of the sweeping piece 5 and the round hole inside the protective piece 6;

[0067] Finally, the qualified steel slag powder is discharged through the screening of the classifier.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel slag final grinding device, comprising a device body (1); characterized in that: A classifier is installed on the top surface of the equipment body (1), a feed pipe (2) is installed on the left end surface of the equipment body (1), a hot air blower is installed on the bottom of the equipment body (1), and hydraulically driven mechanical arms are installed on the left and right sides of the outside of the equipment body (1), the hydraulically driven mechanical arms penetrate the equipment body (1) and a grinding roller is installed at the end, and an inspection port assembly (7) is installed on the front end surface of the equipment body (1); a protective mesh cover is arranged at the bottom of the classifier, a sweeping piece (5) is clamped on the protective mesh cover, and a threaded The threaded opening has a protective member (6) connected thereto by means of a thread; two pre-crushing members (3) are installed inside the feed pipe (2), and a knocking member (4) is arranged on the top surface of the feed pipe (2); the inspection port assembly (7) comprises a fixed window frame (71) and a push-pull plate (72); a fixed clip (7101) is fixedly connected to the front end surface of the fixed window frame (71), a transverse groove is provided in the fixed clip (7101), and a rack plate (7202) fixedly connected to the rear end surface of the push-pull plate (72) is clamped inside the transverse groove.

2. A steel slag final grinding device according to claim 1, characterized in that: A support frame (101) is provided at the bottom of the device body (1), a grinding disc (102) is provided at the bottom of the device body (1), a driving shaft of a driving motor is coaxially connected to the bottom of the grinding disc (102), the driving motor is mounted on the support frame (101), and a hot air blower is mounted on the top of the support frame (101), an air inlet (103) of the hot air blower is located outside the device body (1), and an air outlet duct of the hot air blower is an arc-shaped structure and the air outlet is located inside the device body (1).

3. A steel slag final grinding device according to claim 2, characterized in that: A reinforcement rod (1011) is inserted between two adjacent support frames (101), an insertion rod (10111) is provided at one end of the reinforcement rod (1011), a vertical slot is provided at the other end of the reinforcement rod (1011), both sides of the top surface of the slot are arc-shaped structures, an insertion block (10112) is inserted inside the slot, the insertion block (10112) is inserted into a rectangular hole provided inside the insertion rod (10111), and the top surface of the insertion block (10112) is flush with the top surface of the reinforcement rod (1011).

4. The steel slag final grinding device according to claim 1, characterized in that: The top of the feed pipe (2) is provided with a feeding port (201), the bottom of the feeding port (201) is connected to a shielding cloth (2011), a fixing block (202) is fixedly welded to the top surface of the feed pipe (2), the fixing block (202) is vertically arranged and located inside the equipment body (1), and a dial wheel (203) is connected to the inside of the feed pipe (2) through an axis of rotation.

5. The steel slag final grinding device according to claim 4, characterized in that: The pre-crushing member (3) is fixedly connected to a knocking plate (301), the top surface of the knocking plate (301) is provided with a protruding spherical structural block, the top surface of the knocking plate (301) is welded with a connecting plate (3011), a water collecting box (302) is installed on the back of the knocking plate (301), the interior of the water collecting box (302) is filled with liquid, and a connecting strip is provided at the bottom of the water collecting box (302), the connecting strip is connected to the connecting plate (3011) through a bolt assembly, and a plugging cap (3021) is buckled on the top surface of the bolt assembly, the top surface of the plugging cap (3021) is flush with the top surface of the connecting strip, and rollable balls (3022) are embedded in the inner walls of the front and rear sides of the water collecting box (302), and the balls (3022) are stuck in the annular grooves on the inner wall of the feed pipe (2).

6. The steel slag final grinding device according to claim 4, characterized in that: The knocking piece (4) is rotatably connected to the top surface of the feed pipe (2) via an axis, and a knocking rod (401) is integrally formed on the left end surface of the knocking piece (4). When the knocking piece (4) is located at the uppermost position, the knocking rod (401) fits with the fixing block (202).

7. The steel slag final grinding device according to claim 6, characterized in that: The center of the sweeping member (5) is a circular hole structure, the lowest movable position of the sweeping member (5) is lower than the lowest height of the knocking member (4), and the highest movable position of the sweeping member (5) is lower than the highest height of the knocking member (4), a vertical circular hole is opened inside the protective member (6), and the protective member (6) is an inverted cone structure.

8. The steel slag final grinding device according to claim 1, characterized in that: The inspection port assembly (7) also includes a transparent film (73), a fixed axis gear (71011) is rotatably engaged in the transverse groove of the fixed clamping strip (7101), the fixed axis gear (71011) is meshedly connected with a rack plate (7202) on the back of the push-pull plate (72), a magnetic strip is embedded in the right end of the rack plate (7202), when the push-pull plate (72) is located at the rightmost position, the magnetic strip is adsorbed on the fixed window frame (71), the front end surface of the push-pull plate (72) is fixedly connected with the fixed plate (7201), the fixed axis gear (71011) is connected to the other end of the transparent film (73), and a spring box with a built-in spring is installed on the upper and lower sides of the reel (7301) of the transparent film (73), and the spring is connected to the end of the transparent film (73).

9. A method for using a steel slag final grinding device, using a steel slag final grinding device as described in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Start the hot air blower through the external circuit control end, introduce hot air from the air inlet (103) and finally blow it into the interior of the device body (1) in a vortex manner; S2: The slag is fed into the feeding port (201) by a feeder, and the slag is buffered onto the thumbwheel (203) through the shielding cloth (2011). The thumbwheel (203) rotates under the gravity of the slag and feeds the slag downward to the knocking plate (301). The slag can be pre-crushed by the knocking plate (301) and the spherical structure block on the top surface; S3: Use the grinding roller and grinding disc to grind the steel slag into final powder; S4: The classifier is started. The sweeping piece (5) is rotated synchronously with the classifier and moves upwards due to the centrifugal force and the hot air blown by the hot air blower. After moving upwards, the knocking piece (4) is turned upwards and knocks against the fixed block (202). After the knocking, the knocking piece (4) falls back and moves the sweeping piece (5) downwards, so that the slag stuck in the protective cover of the classifier falls back. S5: The qualified steel slag powder is discharged after being screened by the classifier.

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