Industrial solid waste recycling method

Abstract

The invention relates to the technical field of industrial solid waste recycling, in particular to an industrial solid waste recycling method which comprises a steel slag treatment sorting bin, a transmission bin is fixedly welded to the back face of the steel slag treatment sorting bin, a first grinding roller set is rotationally arranged at the top end of the interior of the steel slag treatment sorting bin, and a frame plate is movably arranged below the first grinding roller set. And a screening net plate is fixedly welded to the top of the interior of the frame plate, a material distributing inclined plate is rotationally installed at the left end of the bottom face of the frame plate, a material distributing hopper and a partition plate are arranged below the material distributing inclined plate, and a second material grinding roller set is rotationally arranged below the material distributing hopper. According to the industrial solid waste recycling and reusing method, the steel slag is subjected to graded crushing, the situation that due to excessive accumulation of the steel slag with different particle sizes in the grinding roller set, blockage is caused, and the grinding and crushing quality and efficiency are affected is prevented, meanwhile, the crushed steel slag can be subjected to dry type dispersion drainage, recoverable iron slag is magnetically separated out, and the steel slag solid waste is preliminarily separated; and the workload of subsequent refined grinding, crushing and magnetic separation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial solid waste recycling, and specifically to a method for recycling industrial solid waste. Background Art

[0002] Industrial solid waste can be divided into general industrial waste and industrial hazardous solid waste. Among them, general industrial waste is the waste with the largest proportion and the most potential utilization value in solid waste, mainly including tailings, fly ash, smelting slag, etc. Among them, the steel slag produced by steelmaking is the industrial solid waste with the largest recycling volume. The slag with a higher iron content can re-enter the steelmaking process, greatly saving costs. The existing steel slag recycling process is basically based on crushing and magnetic separation. First, it is centrally crushed to reduce its particle size, and then sorted to separate the tail slag and waste slag with a high iron content.

[0003] The particle size of the steel slag directly affects the iron extraction amount and efficiency of the subsequent separated tail slag. The particle size of the tail slag obtained only by the rolling and crushing of the crushing equipment is still not enough to improve the iron extraction rate. Moreover, the crushing and magnetic separation equipment are single individual equipment, which requires more pipeline length and occupies a large space, and optimization should be made in the case of subsequent secondary fine sorting.

[0004] In order to solve the above problems, we made improvements and proposed a method for recycling industrial solid waste. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a method for recycling industrial solid waste, including the following steps:

[0007] S1. After the hot steel slag from the workshop is discharged from the furnace, it is transported to a transition slag furnace, a hot splash agent is added and heating is maintained at a constant temperature. After the reaction is completed, exhaust gas is discharged. After discharging the harmful gas, cold water is sprayed to quickly cool and form the steel slag after the high-temperature hot splash reaction.

[0008] S2. After the steel slag is cooled, the waste water is drained, and the steel slag is transported through a pipeline and passes through a drying device to evaporate the residual moisture to ensure dryness.

[0009] S3. The dried steel slag is input into a pretreatment and sorting integrated device for crushing and magnetic separation to obtain steel slag and tail slag with a higher iron content.

[0010] S4. The pretreated tail slag is input into a rod mill for grinding and crushing. After further reducing the particle size, it is input into a magnetic separator for secondary magnetic separation to obtain fine steel slag with a high iron content and waste tail slag.

[0011] The preprocessing and sorting integrated equipment includes a steel slag treatment and sorting bin. A transmission bin is fixedly welded to the back of the steel slag treatment and sorting bin. At the inner top of the steel slag treatment and sorting bin, a first material grinding roller group is rotatably arranged. The first material grinding roller group consists of two material grinding rollers. Below the first material grinding roller group, a frame plate is movably arranged. On the front and back sides of the right end of the frame plate, a driven wheel and a driving wheel are respectively arranged. The driven wheel and the driving wheel are respectively rotatably connected to the front and back sides of the inner wall of the steel slag treatment and sorting bin. The front and back sides of the right end of the frame plate are rotatably connected to the driven wheel and the driving wheel through pin shafts. At the top inside the frame plate, a sieve mesh plate is fixedly welded. At the left end of the bottom surface of the frame plate, a material distributing inclined plate is rotatably installed. Below the material distributing inclined plate, a material distributing hopper and a partition plate are arranged. The material distributing hopper and the partition plate are both located in the middle inside the steel slag treatment and sorting bin and their edges are fixedly welded to the steel slag treatment and sorting bin. The left end of the top of the partition plate is fixedly welded to the right side of the top of the material distributing hopper. Below the material distributing hopper, a second material grinding roller group is rotatably arranged. The second material grinding roller group consists of two material grinding rollers and is located on the left side of the partition plate;

[0012] Below the second material grinding roller group, a third material guiding inclined plate is arranged. Below the third material guiding inclined plate, a fourth material guiding inclined plate is arranged. The front end, left and right sides of the third material guiding inclined plate and the rear end, left and right sides of the fourth material guiding inclined plate are fixedly welded to the inner wall of the steel slag treatment and sorting bin. The rear end of the third material guiding inclined plate slopes downward. The front end of the fourth material guiding inclined plate slopes downward. Below the fourth material guiding inclined plate, a magnetic separation cylinder is rotatably arranged. On both left and right sides of the magnetic separation cylinder, a rotating shaft tube is coaxially and fixedly welded. The rotating shaft tube is rotatably connected to the steel slag treatment and sorting bin through bearings. Inside the magnetic separation cylinder, a permanent magnet magnetic system is arranged;

[0013] At the left end of the inner bottom surface of the transmission bin, a bracket is fixedly arranged. On the top surface of the bracket, an AC motor is fixedly installed through bolts. The rotating shaft of the AC motor is in transmission connection with the first material grinding roller group, the second material grinding roller group, the driving wheel and the magnetic separation cylinder. The roller spacing of the first material grinding roller group is greater than that of the second material grinding roller group.

[0014] As a preferred technical solution of the present invention, a feeding port is opened in the middle of the top surface of the steel slag treatment and sorting bin. Above the feeding port, a feeding hopper is fixedly butt-welded. The feeding port is located above the center of the first material grinding roller group.

[0015] As a preferred technical solution of the present invention, two limiting slide rails are arranged above the material distributing hopper. The two limiting slide rails are respectively fixedly connected to the middle left ends of the front and back sides of the inner wall of the steel slag treatment and sorting bin through bolts. On the surface of the limiting slide rails, limiting sliders are slidably installed. The left ends of the front and back sides outside the frame plate are respectively rotatably connected to the two limiting sliders through pin shafts.

[0016] As a preferred technical solution of the present invention, the front and back sides of the bottom inner wall of the frame plate are fixedly welded with first material guide inclined plates, the opposite ends of the two first material guide inclined plates are inclined downward, the front and rear ends of the bottom surface of the left end of the frame plate are fixedly welded with first hinge seats, the front and rear surfaces of the left end of the material dividing inclined plate are respectively rotatably connected with the two first hinge seats through pins, the front and rear ends of the top surface of the material dividing inclined plate are fixedly welded with side inclined baffles, and the top ends of the two side inclined baffles are inclined in opposite directions to each other.

[0017] As a preferred technical solution of the present invention, an auxiliary slide rail is fixedly installed on the middle part of the bottom surface of the material dividing inclined plate by bolts, an auxiliary slider is slidably installed on the bottom surface of the auxiliary slide rail, and a second hinge seat is rotatably connected to the bottom surface of the auxiliary slider by a pin shaft, and the bottom of the second hinge seat is fixedly welded to the center of the top surface of the partition plate.

[0018] As a preferred technical solution of the present invention, a second material-introducing inclined plate is arranged on the right side of the partition plate, the right side and the front and back sides of the second material-introducing inclined plate are fixedly welded to the middle part of the inner wall of the slag processing and sorting bin, the left end of the second material-introducing inclined plate is tilted downward, and the top surface of the third material-introducing inclined plate is fixedly welded with material dispersion protrusions at equal intervals, and the material dispersion protrusions are semi-arc plates, and the bending opening direction thereof is tilted downward.

[0019] As a preferred technical solution of the present invention, the front end of the fourth material introduction inclined plate is located at the upper rear part of the magnetic separation cylinder, and a connecting rod is arranged inside the magnetic separation cylinder. The left and right ends of the connecting rod pass through the rotating shaft tube and the bearing, and are fixedly connected to the inner wall of the slag processing and sorting bin. The inner surface of the permanent magnet magnetic system is fixedly connected to the connecting rod. The cross-section of the permanent magnet magnetic system is an arc shape, which is a minor arc with a central angle greater than ° but less than °, and its outer surface is close to the inner wall at the upper rear part of the magnetic separation cylinder.

[0020] As a preferred technical solution of the present invention, a driven sprocket is coaxially fixedly welded to the middle of the rotating shaft tube at the right end of the magnetic separation cylinder, the rotating shaft of the AC motor is coaxially fixedly connected to the driving rotating shaft, and the right end of the driving rotating shaft is coaxially fixedly welded to a driving sprocket, and two through openings are vertically penetrated through the right end of the bottom of the back side of the inner wall of the slag processing and sorting bin, and the driven sprocket and the driving sprocket are jointly sleeved with a chain, and the two are connected by chain transmission, and the middle part of the chain passes through the two through openings.

[0021] As a preferred technical solution of the present invention, the middle part of the driving rotating shaft is in meshing transmission connection with a first transmission shaft through bevel gears. The right bottom of the inner wall of the transmission bin is fixedly welded with a first carrier plate. The middle part of the first transmission shaft passes through the first carrier plate and is rotatably connected with it through a bearing. The top of the first transmission shaft is in meshing transmission connection with a second transmission shaft through bevel gears. The left and right ends of the second transmission shaft are respectively rotatably connected with the middle parts of the left and right sides of the inner wall of the transmission bin through bearings. The roller shaft of the second material grinding roller group passes through the back of the steel slag treatment and separation bin and is rotatably connected with it through a bearing. The rear end of its shaft is in transmission connection with the left end of the second transmission shaft through bevel gears.

[0022] As a preferred technical solution of the present invention, the top right end of the second transmission shaft is in meshing connection with a third transmission shaft through bevel gears. The middle right part of the inner wall of the transmission bin is fixedly welded with a second carrier plate. The third transmission shaft passes through the second carrier plate and is rotatably connected with it through a bearing. A first transmission gear is coaxially fixedly connected to the middle of the third transmission shaft. The first transmission gear is located above the left end of the second carrier plate. A second transmission gear is rotatably arranged on the top right end of the second carrier plate. The second transmission gear meshes with the first transmission gear. A fourth transmission shaft is coaxially fixedly connected to the top surface of the second transmission gear. The top right end of the inner wall of the transmission bin is fixedly welded with a third carrier plate. The top of the fourth transmission shaft is rotatably connected with the third carrier plate through a bearing. The shaft of the driving wheel passes through the back of the steel slag treatment and separation bin, and the rear end of its shaft is in meshing transmission connection with the top of the fourth transmission shaft through bevel gears;

[0023] The top of the third transmission shaft passes through the third carrier plate and is rotatably connected with it through a bearing. The top of the third transmission shaft is in meshing connection with a fifth transmission shaft through bevel gears. The left and right ends of the fifth transmission shaft are respectively rotatably connected with the left and right sides of the top of the inner wall of the transmission bin through bearings. The shaft of the first material grinding roller group passes through the back of the steel slag treatment and separation bin, and the rear end of its shaft is in meshing transmission connection with the fifth transmission shaft through bevel gears.

[0024] The beneficial effects of the present invention are as follows: An industrial solid waste recycling and reuse method adopts a method of pre-crushing magnetic separation treatment and re-grinding and magnetic separation of the tail slag after magnetic separation, continuously reducing the particle size of the high-iron-content tail slag, thereby improving the efficiency of subsequent iron extraction work of the tail slag. The adopted pretreatment and separation integrated equipment realizes the combination of the crushing pretreatment and magnetic separation functions of steel slag solid waste in one equipment, performs grading crushing on the steel slag, prevents the material grinding roller group from excessively accumulating steel slag of different particle sizes, resulting in blockage and affecting the quality and efficiency of rolling and crushing. At the same time, it can perform dry dispersion and drainage on the crushed steel slag and magnetically separate the recoverable iron slag, preliminarily separating the steel slag solid waste, removing most of the non-recoverable waste slag, laying a foundation for subsequent refined grinding, crushing and magnetic separation and reducing its workload. Description of the Drawings

[0025] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings:

[0026] Figure 1 is a three-dimensional view of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0027] Figure 2 is a three-dimensional view of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0028] Figure 3 is a three-dimensional view of the internal structure of the front-end steel slag treatment and sorting bin of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0029] Figure 4 is a three-dimensional view of the frame plate of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0030] Figure 5 is a three-dimensional view of the frame plate of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0031] Figure 6 is a top view of the third material guiding inclined plate of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0032] Figure 7 is a sectional view of the magnetic separation cylinder of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0033] Figure 8 is a three-dimensional view of the bottom end of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0034] Figure 9 is a three-dimensional view of the internal structure of the rear-end transmission bin of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0035] Figure 10 is a left sectional structure view of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0036] Figure 11 is a sectional structure view of the back-end transmission bin of the pre-treatment and sorting integrated equipment for an industrial solid waste recycling and reuse method of the present invention;

[0037] In the figure: 1. Steel slag treatment and separation bin; 2. Transmission bin; 3. Feeding hopper; 4. AC motor; 5. First material grinding roller group; 6. Driving wheel; 7. Driven wheel; 8. Frame plate; 9. Limit sliding rail; 10. Limit sliding block; 11. Screening mesh plate; 12. First material guiding inclined plate; 13. First hinge seat; 14. Material distributing inclined plate; 15. Side inclined baffle; 16. Auxiliary sliding rail; 17. Auxiliary sliding block; 18. Second hinge seat; 19. Material distributing hopper; 20. Partition plate; 21. Second material guiding inclined plate; 22. Second material grinding roller group; 23. Third material guiding inclined plate; 24. Material dispersion bump; 25. Fourth material guiding inclined plate; 26. Magnetic separation cylinder; 27. Discharge inclined plate; 28. Permanent magnet magnetic system; 29. Driven sprocket; 30. Driving sprocket; 31. Driving rotating shaft; 32. First transmission shaft; 33. First carrier plate; 34. Second transmission shaft; 35. Third transmission shaft; 36. Second carrier plate; 37. First transmission gear; 38. Second transmission gear; 39. Fourth transmission shaft; 40. Third carrier plate; 41. Fifth transmission shaft. Detailed implementation manners

[0038] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0039] Embodiment: As Figures 1 to 11 shown, an industrial solid waste recycling method includes the following steps:

[0040] S1. After the molten steel slag from the steelmaking workshop is discharged from the furnace, it is transported to a transition slag furnace, where a heat splashing agent is added and heating is maintained at a constant temperature. After the reaction is completed, exhaust gas is discharged. After harmful gases are discharged, cold water is sprayed to quickly cool and form the steel slag after the high-temperature heat splashing reaction.

[0041] S2. After the steel slag is cooled, the waste water is drained. The steel slag is transported through a production line and passed through a drying device to evaporate the residual moisture to ensure dryness.

[0042] S3. The dried steel slag is input into a pretreatment and separation integrated device for crushing and magnetic separation to obtain steel slag with a relatively high iron content and tail slag.

[0043] S4. The pretreated tail slag is input into a rod mill for grinding and pulverization. After the particle size is further reduced, it is input into a magnetic separator for secondary magnetic separation to obtain fine steel slag with a high iron content and waste tail slag.

[0044] The pre-treatment and sorting integrated equipment includes a steel slag treatment and sorting bin 1. A transmission bin 2 is fixedly welded to the back of the steel slag treatment and sorting bin 1. At the inner top of the steel slag treatment and sorting bin 1, a first material grinding roller group 5 is rotatably arranged. The first material grinding roller group 5 consists of two material grinding rollers. Below the first material grinding roller group 5, a frame plate 8 is movably arranged. On the front and back sides of the right end of the frame plate 8, a driven wheel 7 and a driving wheel 6 are respectively arranged. The driven wheel 7 and the driving wheel 6 are respectively rotatably connected to the front and back sides of the inner wall of the steel slag treatment and sorting bin 1. The front and back sides of the right end of the frame plate 8 are rotatably connected to the driven wheel 7 and the driving wheel 6 through pin shafts. At the top inside the frame plate 8, a sieve mesh plate 11 is fixedly welded. At the left end of the bottom surface of the frame plate 8, a material distribution inclined plate 14 is rotatably installed. Below the material distribution inclined plate 14, a material distribution hopper 19 and a partition plate 20 are arranged. The material distribution hopper 19 and the partition plate 20 are both located in the middle inside the steel slag treatment and sorting bin 1 and their edges are fixedly welded to the steel slag treatment and sorting bin 1. The left end of the top of the partition plate 20 is fixedly welded to the right side of the top of the material distribution hopper 19. Below the material distribution hopper 19, a second material grinding roller group 22 is rotatably arranged. The second material grinding roller group 22 consists of two material grinding rollers and is located on the left side of the partition plate 20;

[0045] Below the second material grinding roller group 22, a third material guiding inclined plate 23 is arranged. Below the third material guiding inclined plate 23, a fourth material guiding inclined plate 25 is arranged. The front end, left and right sides of the third material guiding inclined plate 23 and the rear end, left and right sides of the fourth material guiding inclined plate 25 are fixedly welded to the inner wall of the steel slag treatment and sorting bin 1. The rear end of the third material guiding inclined plate 23 slopes downward, and the front end of the fourth material guiding inclined plate 25 slopes downward. Below the fourth material guiding inclined plate 25, a magnetic separation cylinder 26 is rotatably arranged. On both left and right sides of the magnetic separation cylinder 26, rotating shaft tubes are coaxially and fixedly welded. The rotating shaft tubes are rotatably connected to the steel slag treatment and sorting bin 1 through bearings. Inside the magnetic separation cylinder 26, a permanent magnet magnetic system 28 is arranged;

[0046] At the left end of the inner bottom surface of the transmission bin 2, a bracket is fixedly arranged. On the top surface of the bracket, an AC motor 4 is fixedly installed through bolts. The rotating shaft of the AC motor 4 is in transmission connection with the first material grinding roller group 5, the second material grinding roller group 22, the driving wheel 6 and the magnetic separation cylinder 26. The roller spacing of the first material grinding roller group 5 is greater than the roller spacing of the second material grinding roller group 22.

[0047] In the middle of the top surface of the steel slag treatment and sorting bin 1, a feeding port is opened. Above the feeding port, a feeding hopper 3 is fixedly butt-welded. The feeding port is located above the center of the first material grinding roller group 5.

[0048] Above the material distribution hopper 19, two limit sliding rails 9 are arranged. The two limit sliding rails 9 are respectively fixedly connected to the middle left ends of the front and back sides of the inner wall of the steel slag treatment and sorting bin 1 through bolts. On the surface of the limit sliding rails 9, limit sliding blocks 10 are slidably installed. The left ends of the front and back sides outside the frame plate 8 are respectively rotatably connected to the two limit sliding blocks 10 through pin shafts.

[0049] On the front and back of the bottom inside the frame plate 8, first material guiding inclined plates 12 are fixedly welded. The opposite ends of the two first material guiding inclined plates 12 are inclined downward. At the front and rear ends of the bottom surface of the left end of the frame plate 8, first hinge seats 13 are fixedly welded. The front and back of the left end of the material distributing inclined plate 14 are respectively rotationally connected to the two first hinge seats 13 through pin shafts. At the front and rear ends of the top surface of the material distributing inclined plate 14, side inclined baffles 15 are fixedly welded. The tops of the two side inclined baffles 15 are inclined in opposite directions to each other.

[0050] In the middle of the bottom surface of the material distributing inclined plate 14, an auxiliary slide rail 16 is fixedly installed through bolts. An auxiliary slider 17 is slidably installed on the bottom surface of the auxiliary slide rail 16. The bottom surface of the auxiliary slider 17 is rotationally connected to a second hinge seat 18 through a pin shaft. The bottom of the second hinge seat 18 is fixedly welded to the center of the top surface of the partition plate 20.

[0051] A second material guiding inclined plate 21 is arranged on the right side of the partition plate 20. The right side, front, and back of the second material guiding inclined plate 21 are fixedly welded to the middle of the inner wall of the steel slag treatment and separation bin 1. The left end of the second material guiding inclined plate 21 is inclined downward. On the top surface of the third material guiding inclined plate 23, material dispersing convex blocks 24 are fixedly welded at equal intervals. The material dispersing convex blocks 24 are semi-circular plates, and the bending opening direction thereof is obliquely downward.

[0052] The front end of the fourth material guiding inclined plate 25 is located above the rear of the magnetic separation cylinder 26. Inside the magnetic separation cylinder 26, there is a connecting rod. The left and right ends of the connecting rod pass through the rotating shaft tube and bearings, and are fixedly connected to the inner wall of the steel slag treatment and separation bin 1. The inner surface of the permanent magnet magnetic system 28 is fixedly connected to the connecting rod. The cross-section of the permanent magnet magnetic system 28 is circular arc-shaped, which is a minor arc with a central angle greater than 90° but less than 180°, and its outer surface is close to the inner wall above the rear of the magnetic separation cylinder 26.

[0053] In the middle of the rotating shaft tube at the right end of the magnetic separation cylinder 26, a driven sprocket 29 is coaxially fixedly welded. The rotating shaft of the AC motor 4 is coaxially fixedly connected to a driving rotating shaft 31. At the right end of the driving rotating shaft 31, a driving sprocket 30 is coaxially fixedly welded. At the right end of the bottom of the inner wall of the back of the steel slag treatment and separation bin 1, two through openings are vertically penetrated. The driven sprocket 29 and the driving sprocket 30 are jointly sleeved with a chain, and they are connected by chain drive. The middle of the chain passes through the two through openings.

[0054] The middle part of the driving rotating shaft 31 is connected with a first transmission shaft 32 through bevel gear meshing transmission. The bottom of the right end of the inner wall of the transmission bin 2 is fixedly welded with a first carrier plate 33. The middle part of the first transmission shaft 32 passes through the first carrier plate 33 and is rotatably connected with it through a bearing. The top of the first transmission shaft 32 is connected with a second transmission shaft 34 through bevel gear meshing transmission. The left and right ends of the second transmission shaft 34 are respectively rotatably connected with the middle parts of the left and right sides of the inner wall of the transmission bin 2 through bearings. The material grinding roller shaft of the second material grinding roller group 22 passes through the back of the steel slag treatment and separation bin 1 and is rotatably connected with it through a bearing. The rear end of its shaft is connected with the left end of the second transmission shaft 34 through a bevel gear.

[0055] The top of the right end of the second transmission shaft 34 is connected with a third transmission shaft 35 through bevel gear meshing. The middle part of the right end of the inner wall of the transmission bin 2 is fixedly welded with a second carrier plate 36. The third transmission shaft 35 passes through the second carrier plate 36 and is rotatably connected with it through a bearing. A first transmission gear 37 is coaxially fixedly connected to the middle part of the third transmission shaft 35. The first transmission gear 37 is located above the left end of the second carrier plate 36. A second transmission gear 38 is rotatably arranged on the top surface of the right end of the second carrier plate 36. The second transmission gear 38 meshes with the first transmission gear 37. A fourth transmission shaft 39 is coaxially fixedly connected to the top surface of the second transmission gear 38. The top of the right end of the inner wall of the transmission bin 2 is fixedly welded with a third carrier plate 40. The top of the fourth transmission shaft 39 is rotatably connected with the third carrier plate 40 through a bearing. The shaft of the driving wheel 6 passes through the back of the steel slag treatment and separation bin 1, and the rear end of its shaft is connected with the top of the fourth transmission shaft 39 through bevel gear meshing transmission;

[0056] The top of the third transmission shaft 35 passes through the third carrier plate 40 and is rotatably connected with it through a bearing. The top of the third transmission shaft 35 is connected with a fifth transmission shaft 41 through bevel gear meshing. The left and right ends of the fifth transmission shaft 41 are respectively rotatably connected with the left and right sides of the top of the inner wall of the transmission bin 2 through bearings. The shaft of the first material grinding roller group 5 passes through the back of the steel slag treatment and separation bin 1, and the rear end of its shaft is connected with the fifth transmission shaft 41 through bevel gear meshing.

[0057] Among them, after the steel slag enters the pretreatment and separation integrated equipment, the AC motor 4 starts to operate. From the left side and the top view, the rotating shaft of the AC motor 4 drives the driving rotating shaft 31 to rotate clockwise. The driving sprocket 30 drives the driven sprocket 29 to rotate clockwise through the chain, and then drives the magnetic separation cylinder 26 to rotate clockwise, while the internal permanent magnet magnetic system 28 remains stationary. The driving rotating shaft 31 makes the first transmission shaft 32, the third transmission shaft 35 and the fourth transmission shaft 39 rotate clockwise, counterclockwise and clockwise respectively, while the second transmission shaft 34 and the fifth transmission shaft 41 rotate counterclockwise and clockwise respectively. According to Figure 9 and Figure 11The arrangement of the middle bevel gears enables the operation of the first material rolling roller group 5 and the second material rolling roller group 22. At the same time, the driving wheel 6 rotates counterclockwise from the front view, causing the frame plate 8 and the sieve mesh plate 11 loaded thereon to continuously jolt the steel slag crushed by the first material rolling roller group 5. The steel slag with qualified particle size will pass through the sieve mesh plate 11 and slide down to the third material guiding inclined plate 23 through the material distributing inclined plate 14. The material distributing inclined plate 14 will also move synchronously under the action of the first hinge seat 13, the second hinge seat 18 and the auxiliary sliding rail 16. The unqualified steel slag will fall from the sieve mesh plate 11 into the material distributing hopper 19 and enter the second material rolling roller group 22 with a smaller roller spacing for secondary rolling and crushing, and then also fall onto the third material guiding inclined plate 23. The crushed steel slag will be gradually dispersed during the sliding process under the action of the material dispersion bumps 24 on the third material guiding inclined plate 23, and will be scattered onto the magnetic separation cylinder 26 through the fourth material guiding inclined plate 25. The iron-containing steel slag will be adsorbed on the magnetic separation cylinder 26 and rotate to the right side, and will naturally fall off or be scraped off and discharged through the discharge inclined plate 27 when the magnetic force weakens, while the iron-free waste slag will directly slide and discharge from the rear of the magnetic separation cylinder 26.

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for recycling industrial solid waste, characterized in that: The following steps are involved: S1. After the red slag from steelmaking in the workshop is taken out of the furnace, it is transported to the transition slag furnace to add hot splashing agent and keep heating at a constant temperature. After the reaction is completed, exhaust the gas, and after the harmful gas is discharged, spray cold water to quickly cool the steel slag after the high-temperature hot splashing reaction; S2. After the slag is cooled, the waste water is drained and the slag is transported through the assembly line to the drying equipment to evaporate the residual water to ensure dryness; S3. The dried slag is input into the pretreatment and sorting integrated equipment for crushing and magnetic separation to obtain slag and tailings with high iron content; S4. The pretreated tailings are input into a rod mill for grinding and crushing, and then the particle size is further reduced and then input into a magnetic separator for secondary magnetic separation to obtain fine steel slag with high iron content and waste tailings; The pre-treatment and sorting integrated equipment comprises a slag treatment and sorting bin (1), a transmission bin (2) is fixedly welded on the back of the slag treatment and sorting bin (1), a first material grinding roller group (5) is rotatably arranged on the top of the inner part of the slag treatment and sorting bin (1), the first material grinding roller group (5) is composed of two material grinding rollers, a frame plate (8) is movably arranged below the first material grinding roller group (5), a driven wheel (7) and a driving wheel (6) are respectively arranged on the front and back sides of the right end of the frame plate (8), the driven wheel (7) and the driving wheel (6) are respectively rotatably connected to the front and back sides of the inner wall of the slag treatment and sorting bin (1), and the front and back sides of the right end of the frame plate (8) are rotatably connected to the driven wheel (7) and the driving wheel (6) through a pin shaft. A dividing screen plate (11) is fixedly welded on the top of the frame plate (8), a dividing inclined plate (14) is rotatably mounted on the left end of the bottom surface of the frame plate (8), a dividing hopper (19) and a partition plate (20) are arranged below the dividing inclined plate (14), the dividing hopper (19) and the partition plate (20) are both located in the middle of the steel slag treatment and sorting bin (1) and their edges are fixedly welded to the steel slag treatment and sorting bin (1), the left end of the top of the partition plate (20) is fixedly welded to the right side of the top of the dividing hopper (19), a second material grinding roller group (22) is rotatably arranged below the dividing hopper (19), the second material grinding roller group (22) is composed of two material grinding rollers, and both are located on the left side of the partition plate (20); A third material-introducing inclined plate (23) is arranged below the second material-rolling roller group (22), and a fourth material-introducing inclined plate (25) is arranged below the third material-introducing inclined plate (23). The front end and left and right sides of the third material-introducing inclined plate (23) and the rear end and left and right sides of the fourth material-introducing inclined plate (25) are fixedly welded to the inner wall of the slag processing and sorting bin (1). The rear end of the third material-introducing inclined plate (23) is tilted downward, and the front end of the fourth material-introducing inclined plate (25) is tilted downward. A magnetic separation drum (26) is rotatably arranged below the fourth material-introducing inclined plate (25). A rotating shaft tube is coaxially fixedly welded on both left and right sides of the magnetic separation drum (26). The rotating shaft tube is rotatably connected to the slag processing and sorting bin (1) through a bearing, and a permanent magnet system (28) is arranged inside the magnetic separation drum (26); A bracket is fixedly provided at the left end of the inner bottom surface of the transmission bin (2), and an AC motor (4) is fixedly installed on the top surface of the bracket by bolts. The rotating shaft of the AC motor (4) is transmission-connected with the first material-grinding roller group (5), the second material-grinding roller group (22), the driving wheel (6) and the magnetic separation drum (26), and the spacing between the material-grinding rollers of the first material-grinding roller group (5) is greater than the spacing between the material-grinding rollers of the second material-grinding roller group (22).

2. The method for recycling industrial solid waste according to claim 1, characterized in that: A feeding port is provided in the middle of the top surface of the slag processing and sorting bin (1), a feeding hopper (3) is fixedly butt-welded above the feeding port, and the feeding port is located above the center of the first grinding roller group (5).

3. The method for recycling industrial solid waste according to claim 1, characterized in that: Two limit slide rails (9) are arranged above the material distribution hopper (19), and the two limit slide rails (9) are respectively fixedly connected to the left ends of the middle part of the front and back sides of the inner wall of the slag processing and sorting bin (1) by bolts, and the surface of the limit slide rail (9) is slidably installed with a limit slider (10), and the left ends of the front and back sides of the outer side of the frame plate (8) are respectively rotatably connected to the two limit sliders (10) by pin shafts.

4. The method for recycling industrial solid waste according to claim 1, characterized in that: The front and back sides of the bottom of the inner wall of the frame plate (8) are fixedly welded with first material guide inclined plates (12), and the opposite ends of the two first material guide inclined plates (12) are tilted downward. The front and rear ends of the bottom surface of the left end of the frame plate (8) are fixedly welded with first hinge seats (13). The front and rear sides of the left end of the material distribution inclined plate (14) are rotatably connected to the two first hinge seats (13) through pin shafts, and the front and rear ends of the top surface of the material distribution inclined plate (14) are fixedly welded with side inclined baffles (15), and the top ends of the two side inclined baffles (15) are tilted in opposite directions to each other.

5. The method for recycling industrial solid waste according to claim 1, characterized in that: An auxiliary slide rail (16) is fixedly installed on the middle part of the bottom surface of the material dividing inclined plate (14) by bolts, and an auxiliary slider (17) is slidably installed on the bottom surface of the auxiliary slide rail (16). The bottom surface of the auxiliary slider (17) is rotatably connected with a second hinge seat (18) via a pin shaft, and the bottom of the second hinge seat (18) is fixedly welded to the center of the top surface of the partition plate (20).

6. The method for recycling industrial solid waste according to claim 1, characterized in that: A second material-introducing inclined plate (21) is provided on the right side of the partition plate (20); the right side and the front and back sides of the second material-introducing inclined plate (21) are fixedly welded to the middle of the inner wall of the slag processing and sorting bin (1); the left end of the second material-introducing inclined plate (21) is tilted downward; and material dispersing protrusions (24) are fixedly welded at equal intervals on the top surface of the third material-introducing inclined plate (23); the material dispersing protrusions (24) are semi-arc plates, and their bending opening direction is tilted downward.

7. The method for recycling industrial solid waste according to claim 1, characterized in that: The front end of the fourth material introduction inclined plate (25) is located at the upper rear part of the magnetic separation cylinder (26). A connecting rod is arranged inside the magnetic separation cylinder (26). The left and right ends of the connecting rod pass through the rotating shaft tube and the bearing and are fixedly connected to the inner wall of the slag processing and sorting bin (1). The inner surface of the permanent magnet magnetic system (28) is fixedly connected to the connecting rod. The cross section of the permanent magnet magnetic system (28) is an arc shape, which is a minor arc with a central angle greater than 90° but less than 180°, and its outer surface is close to the inner wall at the upper rear part of the magnetic separation cylinder (26).

8. The method for recycling industrial solid waste according to claim 1, characterized in that: A driven sprocket (29) is coaxially fixedly welded to the middle of the shaft tube at the right end of the magnetic separation cylinder (26); a driving shaft (31) is coaxially fixedly connected to the shaft of the AC motor (4); a driving sprocket (30) is coaxially fixedly welded to the right end of the driving shaft (31); two through openings are vertically penetrated through the right end of the bottom of the back side of the inner wall of the slag treatment and sorting bin (1); a chain is jointly sleeved on the driven sprocket (29) and the driving sprocket (30); the two are connected by chain transmission, and the middle of the chain passes through the two through openings.

9. The method for recycling industrial solid waste according to claim 8, characterized in that: The middle part of the driving shaft (31) is connected to the first transmission shaft (32) through a bevel gear meshing transmission, and a first carrier plate (33) is fixedly welded to the bottom of the right end of the inner wall of the transmission bin (2). The middle part of the first transmission shaft (32) passes through the first carrier plate (33) and is rotatably connected to the first carrier plate (33) through a bearing. The top of the first transmission shaft (32) is connected to the second transmission shaft (34) through a bevel gear meshing transmission. The left and right ends of the second transmission shaft (34) are respectively rotatably connected to the middle of the left and right sides of the inner wall of the transmission bin (2) through bearings. The grinding roller shaft of the second grinding roller group (22) passes through the back of the slag processing and sorting bin (1) and is rotatably connected to the bin through a bearing. The rear end of the shaft is transmission-connected to the left end of the second transmission shaft (34) through a bevel gear.

10. The method for recycling industrial solid waste according to claim 9, characterized in that: The top of the right end of the second transmission shaft (34) is meshed with a third transmission shaft (35) through a bevel gear. A second carrier plate (36) is fixedly welded to the middle of the right end of the inner wall of the transmission chamber (2). The third transmission shaft (35) passes through the second carrier plate (36) and is rotatably connected to the second carrier plate (36) through a bearing. The middle of the third transmission shaft (35) is coaxially fixedly connected with a first transmission gear (37). The first transmission gear (37) is located above the left end of the second carrier plate (36). The second transmission gear (37) is rotatably arranged on the right end of the top surface of the second carrier plate (36). The second transmission gear (38) is meshed with the first transmission gear (37), the top surface of the second transmission gear (38) is coaxially fixedly connected with a fourth transmission shaft (39), the top of the right end of the inner wall of the transmission bin (2) is fixedly welded with a third carrier plate (40), the top of the fourth transmission shaft (39) is rotatably connected with the third carrier plate (40) through a bearing, the rotating shaft of the driving wheel (6) passes through the back of the slag processing and sorting bin (1), and the rear end of the rotating shaft is meshed and transmission-connected with the top of the fourth transmission shaft (39) through a bevel gear; The top of the third transmission shaft (35) passes through the third carrier plate (40) and is rotatably connected thereto via a bearing. The top of the third transmission shaft (35) is meshedly connected to the fifth transmission shaft (41) via a bevel gear. The left and right ends of the fifth transmission shaft (41) are respectively rotatably connected to the left and right sides of the top of the inner wall of the transmission bin (2) via bearings. The rotating shaft of the first grinding roller group (5) passes through the back of the slag processing and sorting bin (1), and the rear end of its rotating shaft is meshedly connected to the fifth transmission shaft (41) via a bevel gear.

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