A crushing device for steel slag treatment

CN224778186UActive Publication Date: 2026-09-22JIANGSU JIN MU TU TECH CO LTD
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Patent Information

Application Number
CN202522347884.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-05
Publication Date
2026-09-22
Estimated Expiration
2035-11-05

AI Technical Summary

Technical Problem

[0005]本实用新型的目的在于提供一种用于钢渣处理的破碎装置,以解决背景技术中不便对钢渣均匀破碎的问题

Benefits of technology

[0016]本实用新型通过在主箱体内部设置第一滤板,进而可将大块钢渣筛出,通过在第一破碎箱内部设置破碎组件,进而可对大块钢渣进行挤压破碎,通过在第一破碎箱与第二破碎箱之间设置连接筒,连接筒内部转料辊上阵列设有若干个转运槽,进而可向第二破碎箱内部均匀添加待破碎钢渣,以避免第二破碎箱内部堵塞,通过在第二破碎箱出料端设置输送管,输送管底端设置第二滤板,使得在螺旋板对钢渣进行输送的过程中,第二滤板可对钢渣进行筛分,通过设置循环机构,进而便于将第二滤板筛选出的钢渣重新输送至第二破碎箱内部进行循环破碎,从而增加了钢渣处理破碎装置的实用性。

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Abstract

The utility model discloses a kind of crushing devices for steel slag treatment, it is related to steel slag treatment technical field, including first crushing box and second crushing box, the first filter plate is equipped in the first crushing box feed end at main box interior, the first crushing box interior is equipped with crushing assembly, the first crushing box discharge end is connected with the feed end of second crushing box and is equipped with connecting cylinder, the connecting cylinder interior is equipped with material rotating mechanism, the second crushing box discharge end is connected with conveying pipe, the conveying pipe discharge end is equipped with circulation mechanism, the utility model is by being equipped with crushing assembly in the first crushing box interior, and then can be extruded and broken to large steel slag, by being equipped with a plurality of transfer grooves in array on material rotating roller, and then can be evenly added to the second crushing box interior to be broken steel slag, by being equipped with second filter plate, so that in the process of being transported by spiral plate to steel slag can be screened to steel slag, by being equipped with circulation mechanism, and then conveniently to be broken in cycle to steel slag.
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Description

Technical Field

[0001] This utility model relates to the field of steel slag treatment technology, specifically a crushing device for steel slag treatment. Background Technology

[0002] Steel slag is one of the main byproducts of steel production, formed during the smelting stage of steelmaking. In the steelmaking furnace, raw materials such as iron ore or scrap steel are melted at high temperatures, and various steelmaking auxiliary materials such as limestone, iron ore, and ferromanganese are added. Through a series of chemical reactions, impurities such as silicon, manganese, phosphorus, and sulfur are removed from the molten iron. These impurities react with fluxes such as calcium oxide at high temperatures to generate a mixture of various metal oxides and salts, which solidifies into a solid slag upon cooling. Currently, the main utilization methods of steel slag include recycling within steel enterprises, replacing lime as a smelting flux, and returning it to blast furnaces or sintering furnaces as raw material for ironmaking. It is also widely used in highway and railway subgrade engineering, cement production, and soil improvement. To achieve the resource utilization of steel slag, the raw steel slag usually needs to be crushed, making crushers one of the key pieces of equipment.

[0003] Based on the aforementioned utilization methods, crushing is an indispensable pretreatment step in steel slag processing. However, existing crushing equipment still has certain limitations in practical applications. Currently, most common crushers adopt a double-roll crushing structure, which, although possessing a certain crushing capacity, is prone to jamming when processing steel slag due to the presence of large-sized lumps in the raw material. This affects the continuous and stable operation of the equipment. Furthermore, the rapid descent of steel slag within the crushing chamber results in insufficient residence time in the crushing zone, making it difficult to achieve thorough and uniform crushing, ultimately impacting the uniformity of the finished product particle size and the overall crushing quality.

[0004] Based on this, a crushing device for steel slag treatment is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a crushing device for steel slag processing, so as to solve the problem of inconvenience in uniformly crushing steel slag in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A crushing device for steel slag treatment includes a first crushing box and a second crushing box, both installed inside a main body. The second crushing box is located below the discharge end of the first crushing box. A first filter plate is provided inside the main body and at the feed end of the first crushing box. A feed pipe is provided on the outside of the main body and connected to one end of the first filter plate. A guide plate is installed at the bottom of the first crushing box. A crushing component for crushing large pieces of steel slag is provided inside the first crushing box. A connecting cylinder is provided between the discharge end of the first crushing box and the feed end of the second crushing box. A material transfer mechanism is provided inside the connecting cylinder. Crushing rollers are symmetrically arranged inside the second crushing box. A conveying pipe is connected to the discharge end of the second crushing box. A circulation mechanism for circulating and feeding the steel slag is provided at the discharge end of the conveying pipe.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: a first gear and a second gear are fixedly mounted on one end of each of the two crushing rollers, the first gear and the second gear mesh with each other, one end of one crushing roller is fixedly connected to the output end of a second motor, the second motor is fixedly mounted on one side of the second crushing box, the second motor is electrically connected to a control component, and the control component is located on the outside of the main box.

[0010] In one alternative: the conveying pipe is provided with a mounting shaft that rotates inside, and a spiral plate is fixedly mounted on the mounting shaft. The spiral plate is in close contact with the inside of the conveying pipe. One end of the mounting shaft is fixedly connected to the output end of a third motor. The third motor is fixedly mounted at the end of the conveying pipe. The bottom end of the conveying pipe is provided with a mounting groove, and a second filter plate is installed inside the mounting groove. A discharge pipe is provided at the bottom end of the conveying pipe corresponding to the position of the second filter plate.

[0011] In one alternative embodiment: the crushing assembly includes crushing blocks, two of which are symmetrically arranged inside a first crushing box, one side of which is inclined, and the crushing blocks are fixedly installed at the output end of a first electric cylinder. The first electric cylinder is installed in a mounting groove on one side of the first crushing box, and guide blocks are fixedly provided inside the first crushing box and at the upper end of the crushing blocks. The upper ends of the guide blocks are inclined, and the first electric cylinders are electrically connected to a control component.

[0012] In one alternative embodiment: the material transfer mechanism includes a material transfer roller, which is rotatably disposed inside the connecting cylinder. The material transfer roller is provided with a plurality of transfer grooves. One end of the material transfer roller is fixedly connected to the output end of a first motor. The first motor is fixedly disposed on one side of the connecting cylinder and is electrically connected to a control component. The material transfer roller is provided with an adjustment component for adjusting the transfer amount of the transfer grooves.

[0013] In one alternative embodiment: the adjusting assembly includes adjusting plates, each adjusting plate is slidably disposed within the transfer trough, each adjusting plate has a connecting rod hinged to its bottom end, the other end of each connecting rod is hinged to a sliding rod, one end of each sliding rod has a guide rod slidably disposed thereon, the guide rod is fixedly disposed inside the transfer roller, one end of each sliding rod has an extension rod fixedly disposed thereon, one end of the extension rod extends to the outside of the main housing, one end of the extension rod has a rotating plate rotatably disposed thereon, the rotating plate is fixedly disposed at the output end of a second electric cylinder, and the second electric cylinder is fixedly disposed inside the main housing.

[0014] In one alternative embodiment: the circulation mechanism includes a material transfer ring, with several partitions arranged in an array on the inner side of the material transfer ring, and a sealing ring fitted on the inner side of the material transfer ring. One end of each partition is in close contact with the outer side of the sealing ring. The partitions, the material transfer ring, and the sealing ring are combined to form several material distribution grooves. The sealing ring is installed at the discharge end of the conveying pipe. Support rings are rotatably provided at both ends of the material transfer ring. Each support ring is fixedly installed inside the main housing. A return pipe is connected to one side of each support ring, and the other end of the return pipe is connected to the interior of the second crushing box. A toothed ring is fixedly provided on the outer side of the material transfer ring, and a third gear meshes on the toothed ring. The third gear is fixedly installed at the output end of a fourth motor, and the fourth motor is fixedly installed inside the main housing.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention features a first filter plate inside the main housing to screen out large pieces of steel slag, a crushing assembly inside the first crushing chamber to crush the large pieces of steel slag, a connecting cylinder between the first and second crushing chambers with several transfer grooves arrayed on the transfer roller inside the connecting cylinder to evenly add the steel slag to be crushed into the second crushing chamber to prevent blockage, a conveying pipe at the discharge end of the second crushing chamber with a second filter plate at the bottom of the conveying pipe to screen the steel slag during the conveying process by the spiral plate, and a circulation mechanism to facilitate the return of the steel slag screened by the second filter plate to the second crushing chamber for cyclic crushing, thereby increasing the practicality of the steel slag processing and crushing device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the main body of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the connecting cylinder and the second crushing box of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the first crushing box of this utility model.

[0021] Figure 5 This is a schematic diagram of the installation of the second filter plate of this utility model.

[0022] Figure 6 This is a schematic diagram of the sliding rod structure of this utility model.

[0023] Figure 7 This is a schematic diagram of the installation of the fourth electric motor of this utility model.

[0024] Figure 8 This is a schematic diagram of the partition installation of this utility model.

[0025] Figure 9 This is a schematic diagram of the material transfer ring structure of this utility model.

[0026] Figure reference numerals: 11 Main housing, 12 Feed pipe, 13 First filter plate, 14 Guide plate, 15 First crushing box, 16 Guide block, 17 Crushing block, 18 First electric cylinder, 19 Connecting cylinder, 20 Rotating roller, 21 First motor, 22 Adjusting plate, 23 Connecting rod, 24 Sliding rod, 25 Second electric cylinder, 26 Second crushing box, 27 Crushing roller, 28 Second motor, 29 Conveying pipe, 30 Spiral plate, 31 Third motor, 32 Second filter plate, 33 Discharge pipe, 34 Rotating ring, 35 Partition plate, 36 Sealing ring, 37 Support ring, 38 Toothed ring, 39 Fourth motor, 40 Return pipe, 41 Control components. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, such as Figures 1-6As shown, a crushing device for steel slag treatment includes a first crushing box 15 and a second crushing box 26. Both the first crushing box 15 and the second crushing box 26 are installed inside a main body 11. The second crushing box 26 is located below the discharge end of the first crushing box 15. A first filter plate 13 is provided inside the main body 11 at the feed end of the first crushing box 15. A feed pipe 12 is provided on the outside of the main body 11, communicating with one end of the first filter plate 13. A guide plate 14 is installed at the bottom of the first crushing box 15. The first crushing box 15 contains a material guide plate 14 for... A crushing assembly for crushing large pieces of steel slag includes a connecting cylinder 19 that connects the discharge end of the first crushing box 15 to the feed end of the second crushing box 26. The connecting cylinder 19 is equipped with a material transfer mechanism. Crushing rollers 27 are symmetrically arranged inside the second crushing box 26. A conveying pipe 29 is connected to the discharge end of the second crushing box 26. The discharge end of the conveying pipe 29 is equipped with a circulation mechanism for circulating and feeding steel slag. The material transfer mechanism facilitates the uniform addition of steel slag into the second crushing box 26, and the circulation mechanism facilitates the circulating and conveying of the screened steel slag.

[0029] One end of each of the two crushing rollers 27 is fixedly provided with a first gear and a second gear, which mesh with each other. One end of one crushing roller 27 is fixedly connected to the output end of a second motor 28. The second motor 28 is fixedly installed on one side of the second crushing box 26 and electrically connected to a control component 41. The control component 41 is located on the outside of the main box 11. In use, when the crushing roller 27 needs to crush the steel slag, the second motor 28 is started by the control component 41. The output end of the second motor 28 drives one crushing roller 27 to rotate. Since the first gear and the second gear mesh with each other, the two crushing rollers 27 rotate simultaneously and in opposite directions, thereby crushing the steel slag.

[0030] The conveying pipe 29 has a rotating mounting shaft inside, on which a spiral plate 30 is fixedly mounted. The spiral plate 30 is in close contact with the inside of the conveying pipe 29. One end of the mounting shaft is fixedly connected to the output end of the third motor 31. The third motor 31 is fixedly mounted at the end of the conveying pipe 29. The bottom end of the conveying pipe 29 has a mounting groove, inside which a second filter plate 32 is installed. A discharge pipe 33 is located at the bottom end of the conveying pipe 29 corresponding to the position of the second filter plate 32. In use, after the crushing roller 27 crushes the steel slag, the steel slag enters the inside of the conveying pipe 29. At this time, the control component 41 controls the third motor 31 to start. The output end of the third motor 31 drives the mounting shaft to rotate, and the mounting shaft drives the spiral plate 30 to rotate, thereby conveying the steel slag. Under the action of gravity, the steel slag is placed on the second filter plate 32, so that the steel slag can be screened during the steel slag conveying process. The screened steel slag is discharged through the discharge pipe 33.

[0031] The crushing assembly includes crushing blocks 17, two of which are symmetrically arranged inside the first crushing box 15. One side of each crushing block 17 is inclined. Each crushing block 17 is fixed to the output end of a first electric cylinder 18, which is installed in a mounting groove on one side of the first crushing box 15. Guide blocks 16 are fixedly provided inside the first crushing box 15 and at the upper end of each crushing block 17, with their upper ends inclined. The first electric cylinder 18 is electrically connected to a control component 41. During use, when… When steel slag needs to be crushed, the steel slag to be crushed is added into the main box 11 through the feed pipe 12. Then the steel slag rolls on the first filter plate 13, which can perform initial screening of the steel slag. The screened steel slag falls onto the upper end of the guide plate 14, and the large pieces of steel slag enter the first crushing box 15. At the same time, the output ends of the two first electric cylinders 18 drive the two crushing blocks 17 to move, so that the two crushing blocks 17 squeeze and crush the large pieces of steel slag. The crushed steel slag and the steel slag on the upper end of the guide plate 14 both enter the connecting cylinder 19.

[0032] The material transfer mechanism includes a material transfer roller 20, which is rotatably mounted inside the connecting cylinder 19. The material transfer roller 20 has several transfer grooves. One end of the material transfer roller 20 is fixedly connected to the output end of the first motor 21. The first motor 21 is fixedly mounted on one side of the connecting cylinder 19 and is electrically connected to the control component 41. In use, when steel slag enters the connecting cylinder 19, the control component 41 controls the first motor 21 to start. The output end of the first motor 21 drives the material transfer roller 20 to rotate. When the transfer groove is aligned with the discharge end of the first crushing box 15, the steel slag on the upper end of the guide plate 14 and inside the first crushing box 15 enters the transfer groove. Subsequently, when the material transfer roller 20 rotates to the feed end of the second crushing box 26, the steel slag in the transfer groove enters the second crushing box 26. At the same time, the two crushing rollers 27 can crush the steel slag. The material transfer roller 20 is equipped with an adjustment component for adjusting the transfer amount of the transfer groove.

[0033] The adjustment assembly includes an adjustment plate 22, which is slidably disposed within each of the transfer troughs. A connecting rod 23 is hinged to the bottom end of each adjustment plate 22, and the other end of each connecting rod 23 is hinged to a sliding rod 24. A guide rod is slidably disposed at one end of the sliding rod 24, which is fixedly disposed inside the transfer roller 20. An extension rod is fixedly disposed at one end of the sliding rod 24, extending to the outside of the main housing 11. A rotating plate is rotatably disposed at one end of the extension rod, and the rotating plate is fixedly disposed at the output end of the second electric cylinder 25. The second electric cylinder 25 is fixedly disposed inside the main housing 11. In use, when the transfer volume of the transfer trough needs to be adjusted, the control component 41 controls the second electric cylinder 25 to start. The output end of the second electric cylinder 25 drives the sliding rod 24 to slide via the extension rod. Under the action of the connecting rod 23, the sliding rod 24 drives the adjustment plate 22 to slide within the transfer trough, thereby adjusting the transfer volume.

[0034] The circulation mechanism includes a material transfer ring 34, with several partitions 35 arranged in an array on the inner side of the material transfer ring 34. A sealing ring 36 is fitted inside the material transfer ring 34, with one end of each partition 35 tightly attached to the outer side of the sealing ring 36. The partitions 35, the material transfer ring 34, and the sealing ring 36 combine to form several material distribution grooves. The sealing ring 36 is installed at the discharge end of the conveying pipe 29. Support rings 37 are rotatably provided at both ends of the material transfer ring 34. The support rings 37 are fixedly installed inside the main housing 11. A return pipe 40 is connected to one side of each support ring 37, and the other end of the return pipe 40 is connected to the inside of the second crushing box 26. A toothed ring 38 is fixedly provided on the outer side of the material transfer ring 34. A third gear is meshed on the gear ring 38. The third gear is fixedly mounted on the output end of the fourth motor 39. The fourth motor 39 is fixedly mounted inside the main housing 11. During use, when the spiral plate 30 is conveying the steel slag, the second filter plate 32 can screen the steel slag. The screened steel slag then enters the distribution trough. The fourth motor 39 is started, and the output end of the fourth motor 39 drives the third gear to rotate. The third gear meshes with the gear ring 38, causing the rotating ring 34 to rotate, which in turn causes the distribution trough to move the steel slag. When the steel slag rotates to the top of the rotating ring 34, it enters the second crushing box 26 through the return pipe 40, where it is crushed again.

[0035] The above embodiment discloses a crushing device for steel slag treatment. When steel slag needs to be crushed, the slag to be crushed is added to the main housing 11 through the feed pipe 12. The slag then rolls on the first filter plate 13, which performs initial screening. The screened slag falls onto the upper end of the guide plate 14, and large pieces of slag enter the first crushing chamber 15. Simultaneously, the output ends of two first electric cylinders 18 drive two crushing blocks 17 to move, causing the two crushing blocks 17 to crush the large pieces of slag. The crushed slag and the slag on the upper end of the guide plate 14 both enter the connecting cylinder 19. The control component 41 controls the start of the first motor 21, and the output end of the first motor 21 drives the rotating roller 20 to rotate. When the transfer trough aligns with the discharge end of the first crushing chamber 15, the slag on the upper end of the guide plate 14 and inside the first crushing chamber 15 enters the transfer trough. Inside, when the transfer roller 20 rotates to the feed end of the second crushing box 26, the steel slag in the transfer trough enters the second crushing box 26. The second motor 28 is started by the control component 41. The output end of the second motor 28 drives a crushing roller 27 to rotate. Since the first gear and the second gear mesh with each other, the two crushing rollers 27 rotate simultaneously and in opposite directions, thus crushing the steel slag. After the crushing roller 27 crushes the steel slag, the steel slag enters the conveying pipe 29. At this time, the third motor 31 is started by the control component 41. The output end of the third motor 31 drives the mounting shaft to rotate. The mounting shaft drives the spiral plate 30 to rotate, thus conveying the steel slag. Under the action of gravity, the steel slag is placed on the second filter plate 32, so that the steel slag can be screened during the steel slag conveying process. The screened steel slag is discharged through the discharge pipe 33.

[0036] The steel slag that is then screened out enters the distribution trough. The fourth motor 39 is started. The output end of the fourth motor 39 drives the third gear to rotate. The third gear meshes with the gear ring 38 to drive the rotating ring 34 to rotate, so that the distribution trough moves the steel slag. When the steel slag rotates to the top of the rotating ring 34, the steel slag enters the second crushing box 26 through the return pipe 40, and then the steel slag is crushed again.

[0037] When it is necessary to adjust the transfer volume of the transfer trough, the control unit 41 controls the second electric cylinder 25 to start. The output end of the second electric cylinder 25 drives the sliding rod 24 to slide through the extension rod. Under the action of the connecting rod 23, the sliding rod 24 drives the adjusting plate 22 to slide in the transfer trough, thereby adjusting the transfer volume.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A crushing device for steel slag treatment, comprising a first crushing box (15) and a second crushing box (26), both the first crushing box (15) and the second crushing box (26) being installed inside a main body (11), the second crushing box (26) being located below the discharge end of the first crushing box (15), a first filter plate (13) being provided inside the main body (11) and at the feed end of the first crushing box (15), a feed pipe (12) being provided on the outside of the main body (11) communicating with one end of the first filter plate (13), and a guide plate (14) being installed at the bottom of the first crushing box (15), characterized in that, The first crushing box (15) is equipped with a crushing component for crushing large pieces of steel slag. A connecting cylinder (19) is connected between the discharge end of the first crushing box (15) and the feed end of the second crushing box (26). A material transfer mechanism is provided inside the connecting cylinder (19). Crushing rollers (27) are symmetrically arranged inside the second crushing box (26). A conveying pipe (29) is connected to the discharge end of the second crushing box (26). A circulation mechanism for circulating and feeding steel slag is provided at the discharge end of the conveying pipe (29).

2. The crushing device for steel slag treatment according to claim 1, characterized in that, One end of each of the two crushing rollers (27) is fixedly provided with a first gear and a second gear, which mesh with each other. One end of one of the crushing rollers (27) is fixedly connected to the output end of a second motor (28). The second motor (28) is fixedly provided on one side of the second crushing box (26). The second motor (28) is electrically connected to a control component (41), which is located on the outside of the main box (11).

3. A crushing device for steel slag treatment according to claim 2, characterized in that, The conveying pipe (29) has a rotating mounting shaft inside, and a spiral plate (30) is fixedly mounted on the mounting shaft. The spiral plate (30) is in close contact with the inside of the conveying pipe (29). One end of the mounting shaft is fixedly connected to the output end of the third motor (31). The third motor (31) is fixedly mounted at the end of the conveying pipe (29). The bottom end of the conveying pipe (29) has a mounting groove, and a second filter plate (32) is installed inside the mounting groove. A discharge pipe (33) is provided at the bottom end of the conveying pipe (29) corresponding to the position of the second filter plate (32).

4. A crushing device for steel slag treatment according to claim 2, characterized in that, The crushing assembly includes crushing blocks (17), two of which are symmetrically arranged inside the first crushing box (15). One side of each crushing block (17) is inclined. Each crushing block (17) is fixedly installed at the output end of a first electric cylinder (18). The first electric cylinder (18) is installed in a mounting groove on one side of the first crushing box (15). Guide blocks (16) are fixedly provided inside the first crushing box (15) and at the upper end of each crushing block (17). The upper end of each guide block (16) is inclined. The first electric cylinder (18) is electrically connected to the control component (41).

5. A crushing device for steel slag treatment according to claim 2, characterized in that, The material transfer mechanism includes a material transfer roller (20), which is rotatably disposed inside the connecting cylinder (19). The material transfer roller (20) is provided with a plurality of transfer grooves. One end of the material transfer roller (20) is fixedly connected to the output end of the first motor (21). The first motor (21) is fixedly disposed on one side of the connecting cylinder (19). The first motor (21) is electrically connected to the control component (41). The material transfer roller (20) is provided with an adjustment component for adjusting the transfer amount of the transfer grooves.

6. A crushing device for steel slag treatment according to claim 5, characterized in that, The adjustment assembly includes an adjustment plate (22), which is slidably provided in the transfer groove. The bottom end of the adjustment plate (22) is hinged to a connecting rod (23), and the other end of the connecting rod (23) is hinged to a sliding rod (24). One end of the sliding rod (24) is slidably provided with a guide slide rod, which is fixedly provided inside the transfer roller (20). One end of the sliding rod (24) is fixedly provided with an extension rod, which extends to the outside of the main box (11). One end of the extension rod is rotatably provided with a rotating plate, which is fixedly provided at the output end of the second electric cylinder (25). The second electric cylinder (25) is fixedly provided inside the main box (11).

7. A crushing device for steel slag treatment according to claim 2, characterized in that, The circulation mechanism includes a material transfer ring (34), with several partitions (35) arranged in an array on the inner side of the material transfer ring (34). A sealing ring (36) is fitted on the inner side of the material transfer ring (34). One end of each partition (35) is in close contact with the outer side of the sealing ring (36). The partitions (35), the material transfer ring (34), and the sealing ring (36) are combined to form several material distribution grooves. The sealing ring (36) is installed at the discharge end of the conveying pipe (29). Support rings (37) are rotatably provided at both ends of the material transfer ring (34). The support rings (37) are all fixed inside the main box (11). One side of the support ring (37) is connected to a return pipe (40), and the other end of the return pipe (40) is connected to the inside of the second crushing box (26). The outer side of the transfer ring (34) is fixedly provided with a toothed ring (38), and a third gear is meshed on the toothed ring (38). The third gear is fixedly provided at the output end of the fourth motor (39), and the fourth motor (39) is fixedly provided inside the main box (11).