Steel slag granulation process based on steel slag granulation treatment equipment

Abstract

The present application relates to the technical field of steel slag treatment, and particularly relates to a steel slag granulation process, which comprises the following steps: high-temperature molten depleted slag is injected into a hopper through a flow channel; compressed gas is used at the feeding end of the hopper to scatter the high-temperature molten depleted slag into depleted slag particles; cooling water is used above the hopper to cool the depleted slag particles into normal-temperature depleted slag; and the normal-temperature depleted slag is recovered, wherein the high-temperature molten depleted slag is scattered into depleted slag particles by compressed gas, and the particle size of the scattered depleted slag particles is greater than 90% and less than 5 mm, so that the granulation effect of the depleted slag is improved.

Description

Technical Field

[0001] This invention relates to the field of steel slag treatment technology, and in particular to a steel slag granulation process based on steel slag granulation treatment equipment. Background Technology

[0002] Slag is a fundamental condition for metallurgical reactions and an inevitable byproduct of the smelting process. With increasingly stringent national environmental protection requirements, steel companies are constantly exploring various methods to address metallurgical solid waste such as iron slag and steel slag. Existing steel slag treatment technologies mainly include hot pouring, dripping, air quenching, and water quenching. Air quenching utilizes the relatively weak intermolecular attraction of high-temperature liquid steel slag. A high-pressure nozzle sprays air to disperse and granulate the slag. The slag particles undergo primary cooling by the airflow and then secondary cooling in a water tank. After magnetic separation, the iron-containing portion of the recovered slag particles can be directly returned to the converter for reuse, while the tailings can be used to produce building materials or, after particle size reduction, directly used as blasting material, thus achieving comprehensive resource utilization of steel slag.

[0003] However, existing technologies still have shortcomings in use. For example, the steel slag air granulation device with patent number CN88211276U consists of an intermediate tundish, an atomizer, and a water tank. The bottom of the intermediate tundish and the flow channel have a certain slope. The atomizer has an air inlet pipe, and its front spray holes are arranged in an H-shape. The atomizer can change the spray angle through the angle positioning plate. The diameter of the lean slag particles produced by this device after granulation of steel slag is generally large, and the granulation efficiency of steel slag is low. Summary of the Invention

[0004] This invention provides a steel slag granulation process based on steel slag granulation treatment equipment to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a steel slag granulation process, comprising the following steps:

[0006] A. High-temperature molten lean slag is injected into the hopper through a flow channel;

[0007] B. Compressed gas is used at the feed end of the hopper to break the high-temperature molten lean slag into lean slag particles;

[0008] C. Use cooling water above the hopper to cool the slag particles to room temperature slag;

[0009] D. Recover the room temperature lean slag.

[0010] Preferably, in step C, when cooling water is used above the hopper to cool the slag particles to room temperature, the generated flue gas is collected uniformly through the flue gas outlet, which is located above the hopper.

[0011] Preferably, the compressed gas can be compressed air or compressed nitrogen.

[0012] Preferably, the pressure of the compressed air or compressed nitrogen is 2-2.5 MPa.

[0013] Preferably, the hydraulic pressure of the cooling water is 0.5-0.9 MPa.

[0014] Preferably, in step B, before using compressed gas above the hopper to break the high-temperature molten lean slag into lean slag particles, the flow direction of compressed air or compressed nitrogen is adjusted so that the flow direction of compressed air or compressed nitrogen intersects with the pre-flow path of the high-temperature molten lean slag.

[0015] Preferably, in step C, before cooling the slag particles to room temperature using cooling water above the hopper, the spray direction of the cooling water is adjusted so that the spray direction of the cooling water intersects with the pre-flow path of the high-temperature molten slag.

[0016] Preferably, in step A, when the high-temperature molten lean slag is injected into the hopper through the flow channel, the injection velocity of the high-temperature molten lean slag is 25-75 t / h.

[0017] Preferably, in step D, when recycling the room temperature lean slag, a scraper conveyor is used for transfer.

[0018] The beneficial effects of this invention are as follows:

[0019] In the solution of this invention:

[0020] 1. High-temperature molten lean slag is broken into lean slag particles by compressed gas. After breaking, more than 90% of the lean slag particles are less than 5mm in size. This process improves the granulation effect of lean slag.

[0021] 2. After the depleted slag particles are cooled to room temperature by cooling water, the room temperature depleted slag particles can be collected quickly. Attached image description:

[0022] Figure 1 This is a process flow diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the box structure of the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle;

[0026] Figure 5 This is a cross-sectional view of the angle component of the present invention;

[0027] Figure 6 This is a schematic diagram of the unloading component structure of the present invention;

[0028] Figure 7 This is a cross-sectional view of the collection component of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified view of a section at point B in the middle;

[0030] Figure 9 This is a schematic diagram showing the location of the grille in this invention.

[0031] The components include: 1. Directional component; 2. Housing; 3. Air pressure component; 4. Spray component; 5. Hopper; 6. Scraper conveyor; 7. Air inlet pipe; 8. Air guide pipe; 9. Air pressure pipe; 10. Liquid inlet pipe; 11. Liquid guide pipe; 12. Spray pipe; 13. Mounting column; 14. Gear ring; 15. Angle component; 16. Hemisphere; 17. Gear arc; 18. Guide column; 19. L-shaped stop; 20. Unloading component; 21. Baffle; 22. Guide plate; 23. Unloading plate; 24. Adjusting component; 25. Mounting column; 26. Groove; 27. Connecting hole; 28. Exhaust hole; 29. ​​Liquid drain hole; 30. Fan-shaped nozzle; 31. Filter component; 32. Filter screen; 33. Hollow cooling roller; 34. Vibrating plate; 35. Collecting component; 36. Collecting box; 37. Guide arc; 38. Collecting box; 39. Second filter screen; 40. Grille; 41. Baffle. Detailed Implementation

[0032] 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 for illustration and explanation only and are not intended to limit the present invention.

[0033] Example: Reference Figures 1-9 A steel slag granulation process includes the following steps:

[0034] A. High-temperature molten lean slag is injected into hopper 5 through a flow channel;

[0035] B. Compressed gas is used at the feed end of hopper 5 to break the high-temperature molten lean slag into lean slag particles.

[0036] C. Use cooling water above hopper 5 to cool the depleted slag particles to room temperature depleted slag;

[0037] D. Recover the room temperature lean slag.

[0038] The principles and beneficial effects of the above scheme are as follows:

[0039] After the high-temperature molten lean slag is injected into the hopper 5, the high-temperature molten lean slag is dispersed into lean slag particles by compressed gas. After dispersion, more than 90% of the lean slag particles have a particle size of <5mm. This process improves the granulation effect of the lean slag. After the lean slag particles are cooled to room temperature by cooling water, the room temperature lean slag particles can be collected quickly.

[0040] The steps are as follows: C. When cooling water is used above hopper 5 to cool the slag particles to room temperature, the generated flue gas is collected uniformly through the flue gas outlet, which is located above hopper 5.

[0041] The principles and beneficial effects of the above scheme are as follows:

[0042] The process involves collecting the flue gas generated when the slag particles are cooled to room temperature, thus protecting the health of on-site workers and ensuring the safety of the equipment.

[0043] The compressed gas can be compressed air or compressed nitrogen.

[0044] The principles and beneficial effects of the above scheme are as follows:

[0045] When granulating lean slag, compressed gas can be compressed air or compressed nitrogen, which improves the applicability of the process.

[0046] The pressure of the compressed air or compressed nitrogen is 2-2.5 MPa.

[0047] The principles and beneficial effects of the above scheme are as follows:

[0048] In this process, the pressure of compressed air or compressed nitrogen is 2-2.5 MPa, which further improves the granulation effect of the lean slag.

[0049] The hydraulic pressure of the cooling water is 0.5-0.9 MPa.

[0050] The principles and beneficial effects of the above scheme are as follows:

[0051] By setting the hydraulic pressure of the cooling water to 0.5-0.9 MPa, the distance of the cooling water jet can be increased, thereby improving the cooling efficiency of the cooling water.

[0052] Step B: Before using compressed gas above hopper 5 to break the high-temperature molten lean slag into lean slag particles, adjust the flow direction of compressed air or compressed nitrogen so that the flow direction of compressed air or compressed nitrogen intersects with the pre-flow path of the high-temperature molten lean slag.

[0053] The principles and beneficial effects of the above scheme are as follows:

[0054] Before granulating the high-temperature molten lean slag, adjust the flow direction of compressed air or compressed nitrogen so that it intersects with the pre-flow path of the high-temperature molten lean slag. This prevents incomplete granulation of the high-temperature molten lean slag, which could lead to equipment damage.

[0055] The steps are as follows: C. Before using cooling water above hopper 5 to cool the depleted slag particles to room temperature depleted slag, adjust the spray direction of the cooling water so that the spray direction of the cooling water intersects with the pre-flow path of the high-temperature molten depleted slag.

[0056] The principles and beneficial effects of the above scheme are as follows:

[0057] Before cooling the granulated lean slag, adjust the flow direction of the cooling water so that it intersects with the pre-flow path of the high-temperature molten lean slag, which facilitates the rapid cooling of the lean slag particles to room temperature lean slag particles.

[0058] The steps are as follows: A. When injecting the high-temperature molten lean slag into the hopper 5 through the flow channel, the flow rate of the high-temperature molten lean slag is 25-75 t / h.

[0059] The principles and beneficial effects of the above scheme are as follows:

[0060] The flow rate of the high-temperature molten lean slag injection is 25-75 t / h. This process improves the rapid flow of the high-temperature molten lean slag and further improves the granulation efficiency of the lean slag.

[0061] Step D: When recycling the room temperature lean slag, a scraper conveyor 6 is used for transfer.

[0062] The principles and beneficial effects of the above scheme are as follows:

[0063] The cooled, room-temperature slag is transferred via scraper conveyor 6, which improves the transfer efficiency of the process and the cleanliness of the site.

[0064] A steel slag granulation treatment device, employing any one of the steel slag granulation processes described above, includes: a hopper 5 and a scraper conveyor 6. The hopper 5 and a directional component 1 are arranged on a workbench. A housing 2 is connected to the directional component 1. A pneumatic pressure component 3 and a spray component 4 are installed inside the housing 2 from top to bottom. The output ends of the pneumatic pressure component 3 and the spray component 4 are both oriented towards the hopper 5, and the bottom end of the hopper 5 is oriented towards the top end of the scraper conveyor 6.

[0065] The principles and beneficial effects of the above technical solution are as follows:

[0066] The upper and lower ends of the directional component 1 are connected to the housing 2 and the worktable, respectively. The slag is drained through a chute to the granulation space in front of the air pressure component 3 and the spray component 4 inside the housing 2. The air pressure component 3 uses nitrogen or compressed air to break up the high-temperature molten slag into high-temperature slag particles. These particles are then cooled by water spraying from the spray component 4 and become granulated slag particles again. These particles fall into the hopper 5 and are guided by the hopper 5 onto the scraper conveyor 6. The scraper conveyor 6 in this device is an SGB62040T type. The slag is conveyed by the scraper conveyor 6 to granulate the slag. The slag particles are recycled. By setting up the air pressure component 3, the high-temperature molten lean slag can be fully dispersed into lean slag particles, so that the number of particles with a diameter of <5mm after granulation is greater than 90%, which improves the granulation and recovery efficiency. The air pressure component 3 can granulate the lean slag with nitrogen or compressed air, which improves the applicability of the device. By setting up the spray component 4, the dispersed high-temperature lean slag particles can be cooled down quickly, so that the air temperature at the top outlet of the hopper 5 is maintained at about 130℃, which improves the service life of the device while ensuring temperature reduction.

[0067] The air pressure component 3 includes: an air inlet pipe 7, an air guide pipe 8, and an air pressure pipe 9. The air inlet pipe 7 is installed in the through hole on the side wall of the housing 2. The end of the air inlet pipe 7 is connected to one side of multiple air guide pipes 8. The end of the air guide pipe 8 is connected to the inner wall of the housing 2. Multiple air pressure pipes 9 are connected to the other side of the air guide pipe 8. The output end of each air pressure pipe 9 extends out to the other side wall of the housing 2.

[0068] The principles and beneficial effects of the above technical solution are as follows:

[0069] The air supply device is connected to one end of the air inlet pipe 7, and the other end of the air inlet pipe 7 is connected to multiple air guide pipes 8. Each air guide pipe 8 is connected to multiple air pressure pipes 9. By setting multiple air pressure pipes 9, the exhaust area of ​​the output end of the air pressure component 3 is increased, which can efficiently disperse the high-temperature molten lean slag. At the same time, it avoids the temperature inside the device from being too high and affecting the service life of the device. When the device is working, air can be supplied to the air guide pipe 8 through the air inlet pipe 7, and the air guide pipe 8 supplies air to the air pressure pipes 9. The air supply mechanism can use compressed air or nitrogen, which improves the applicability of the device. At the same time, the output end of the air pressure pipe 9 can initially cool the high-temperature molten lean slag.

[0070] The spraying component 4 includes: an inlet pipe 10, a guide pipe 11, and a spray pipe 12. The inlet pipe 10 is installed in the second through hole on the side wall of the box body 2. The end of the inlet pipe 10 is connected to one side of a plurality of guide pipes 11. The end of the guide pipes 11 is connected to the inner wall of the box body 2. A plurality of spray pipes 12 are connected to the other side of the guide pipes 11. The output end of each spray pipe 12 extends out to the outside of the other side wall of the box body 2.

[0071] The principles and beneficial effects of the above technical solution are as follows:

[0072] The liquid supply device is connected to one end of the liquid inlet pipe 10, and the other end of the liquid inlet pipe 10 is connected to multiple liquid guide pipes 11 to supply liquid. The liquid guide pipes 11 supply liquid to multiple spray pipes 12, which increases the liquid supply area at the output end of the spray component 4, making it easier to efficiently cool down the dispersed high-temperature lean slag particles. At the same time, the spray pipes 12 cooperate with the air pressure pipes 9 to cool down, which improves the cooling efficiency of the device.

[0073] The output end of the spray pipe 12 is connected to a fan-shaped nozzle 30.

[0074] The principles and beneficial effects of the above technical solution are as follows:

[0075] The output end of the spray pipe 12 is connected to a fan-shaped nozzle 30, which increases the liquid supply area and liquid supply distance of the spray pipe 12.

[0076] The directional component 1 includes a mounting post 13 and a gear ring 14. The mounting post 13 is rotatably connected to the worktable. The gear ring 14 on the mounting post 13 is meshed with a gear. The gear is installed at the output end of the motor. The motor is installed on the worktable. The top of the mounting post 13 is connected to the bottom surface of the housing 2 through an angle component 15.

[0077] The principles and beneficial effects of the above technical solution are as follows:

[0078] As the high-temperature molten lean slag flows through the trough to the granulation space in front of the air pressure component 3 and spray component 4 inside the housing 2, when the high-temperature molten lean slag moves left and right under the guidance of the trough, the operator starts the motor. The gear at the output end of the motor drives the gear ring 14, which meshes with it, to rotate left and right. The left and right rotation of the gear ring 14 drives the left and right rotation of the mounting column 13. The mounting column 13 drives the angle component 15 connected to its top to rotate left and right. The angle component 15 drives the air pressure component 3 and spray component 4 inside the housing 2 to rotate left and right. This ensures that all the high-temperature molten lean slag passing through the granulation space can be dispersed and cooled by the device, preventing the lean slag that has not been cooled from damaging the device, improving the safety of the device, and ensuring the recycling efficiency of the steel slag.

[0079] The angle component 15 includes a hemisphere 16, a toothed arc 17, and a guide post 18. The top end of the mounting post 13 is connected to the bottom end of the guide post 18. The top end of the guide post 18 has a hemisphere groove, the bottom wall of the hemisphere groove has an arc-shaped groove, and the side wall of the guide post 18 has a mounting groove. The mounting groove is connected to the bottom wall of the arc-shaped groove. A second gear is provided in the mounting groove. The second gear is connected to the output end of a second motor. The second motor is mounted on the side wall of the guide post 18. The second gear meshes with the toothed arc 17. The toothed arc 17 is mounted at the bottom end of the hemisphere 16. The top end of the hemisphere 16 is connected to the bottom surface of the housing 2 through the mounting post.

[0080] The principles and beneficial effects of the above technical solution are as follows:

[0081] When the amount of high-temperature molten lean slag in the flow channel suddenly decreases or increases, the distance between the lean slag and the box 2 becomes closer or farther. The operator starts the second motor, causing it to rotate forward or reverse. When the second motor rotates forward, it drives the second gear to rotate forward, which in turn drives the tooth arc 17 and the hemisphere 16 connected to it to rotate in reverse. The mounting column at the top of the hemisphere 16 drives the output end of the box 2 to move downward, granulating the high-temperature molten lean slag near the output end of the box 2. When the second motor rotates in reverse, it drives the second gear to rotate in reverse, which in turn drives the tooth arc 17 and the hemisphere 16 connected to it to rotate in reverse. The hemisphere 16 rotates clockwise, and the guide column 18 at the top of the hemisphere 16 drives the output end of the box 2 to move upward, granulating the high-temperature molten slag far from the output end of the box 2. This ensures that all flowing high-temperature molten slag can be dispersed and cooled by the device, preventing slag that has not been cooled from damaging the device. The angle component 15 works in conjunction with the direction component 1, further improving the safety of the device and ensuring the recycling efficiency of the steel slag. At the same time, the combined use of the angle component 15 and the direction component 1 improves the adjustment response efficiency of the orientation of the output end of the box 2.

[0082] The two inner walls at the top of the arc-shaped groove are respectively connected to the bottom side wall of an L-shaped stop 19, and the bottom surface of the top of each L-shaped stop 19 is in contact with the top surface of one side of the hemisphere 16.

[0083] The principles and beneficial effects of the above technical solution are as follows:

[0084] By connecting the inner wall of the top of the arc groove with the bottom side wall of the L-shaped stop 19, the bottom surface of the top of the L-shaped stop 19 contacts and engages with the top surface of one side of the hemisphere 16, preventing the angle component 15 from moving too far and causing the hemisphere 16 to fall off, thus improving the safety of the device.

[0085] It also includes: unloading component 20; the unloading component 20 includes: baffle 21, guide plate 22, unloading plate 23 and adjusting component 24. The baffle 21 is inserted into the hopper 5. The side wall of the baffle 21 is slidably sealed to one end of the guide plate 22. The two side walls of the guide plate 22 are slidably sealed to one inner wall of the hopper 5 respectively. The other end of the guide plate 22, which is inclined downward, is equipped with a sealing plate. The sealing plate is slidably sealed to the end wall of the unloading plate 23. The other end wall of the unloading plate 23 is connected to the end wall of the hopper 5. One side wall of the unloading plate 23 is connected to the inner wall of the hopper 5. The other side wall of the unloading plate 23 is located below the bottom of the hopper 5. The bottom surface of the guide plate 22 is connected to the adjusting component 24.

[0086] The principles and beneficial effects of the above technical solution are as follows:

[0087] After being granulated by the air pressure component 3 and the spray component 4, the high-temperature molten lean slag is broken into lean slag particles. Among the lean slag particles, those with a diameter > 5 mm have a large particle size and weight. After being broken into smaller pieces by the air pressure component 3 and cooled by the spray component 4, the moving distance in the granulation space is short. The gap between the large-diameter lean slag particles and the output end of the box 2 is small after they fall. The large-diameter lean slag particles fall onto the guide plate 22 on one side of the baffle 21. Guided by the guide plate 22, the large-diameter lean slag particles fall onto the discharge plate 23. Guided by the discharge plate 23, the large-diameter lean slag particles are discharged out of the device.

[0088] By setting baffle 21, large-diameter lean slag particles and qualified lean slag particles can be screened, reducing the workflow and improving work efficiency. At the same time, by setting baffle 21 in the hopper 5, the lean slag particles are evenly distributed, avoiding the accumulation of lean slag particles in the device, which would cause excessive local heat in the device and damage to the device.

[0089] The adjusting component 24 includes: a mounting column 25, a slot 26, a connecting hole 27, an exhaust hole 28, and a drain hole 29. The bottom surface of the guide plate 22 is connected to the mounting column 25. The mounting hole at the top of the workbench is slidably sealed to the mounting column 25. The mounting ring at the bottom of the mounting column 25 is slidably connected to the limiting hole. The bottom surface of the mounting ring is connected to the bottom wall of the limiting hole by a return spring. The mounting column 25 has a slot 26 and a second slot in the longitudinal direction. The connecting hole 27 and the second connecting hole in the longitudinal direction on the side wall of the workbench are both connected to one side of the mounting hole. The exhaust hole 28 and the drain hole 29 in the longitudinal direction on the other side wall of the workbench are both connected to the other side of the mounting hole. The slot 26 is staggered with the coaxial connecting hole 27 and the exhaust hole 28. The second slot is staggered with the coaxial second connecting hole and the drain hole 29. The exhaust hole 28 is connected to the air inlet pipe 7 through a conduit. The drain hole 29 is connected to the liquid inlet pipe 10 through a second conduit.

[0090] The principles and beneficial effects of the above technical solution are as follows:

[0091] The air supply device connected to the end of the connection hole 27 supplies air to the connection hole 27. The gas enters the exhaust hole 28 through the mounting hole and the slot 26. The end of the exhaust hole 28 supplies air to the air inlet pipe 7 through the conduit. The liquid supply device connected to the end of the second connection hole supplies liquid to the second connection hole. The liquid enters the drain hole 29 through the second slot of the mounting hole. The end of the drain hole 29 supplies liquid to the inlet pipe 10 through the second conduit.

[0092] When the granulation effect of the device on the lean slag decreases, the number of large-diameter lean slag particles falling onto the guide plate 22 increases, the pressure on the guide plate 22 increases, the guide plate 22 drives the mounting column 25 connected to its bottom surface to move downward, the return spring is compressed, and the slot 26 and the second slot on the mounting column 25 move downward synchronously. The conduction area between one side of the slot 26 and the connecting hole 27 increases, the exhaust volume of the exhaust hole 28 increases, the intake volume of the air inlet pipe 7 increases, and the air pressure at the output end of the air pressure pipe 9 is strengthened, thus increasing the dispersing effect on the lean slag. The conduction area between one side of the second slot and the second connecting hole increases, the discharge volume of the drain hole 29 increases, the intake volume of the liquid inlet pipe 10 increases, and the discharge volume at the output end of the spray pipe 12 increases, thus increasing the cooling effect on the lean slag particles.

[0093] When the granulation effect of the device on the lean slag returns to normal, the number of large-diameter lean slag particles falling onto the guide plate 22 decreases, the pressure on the guide plate 22 decreases, the reset spring is reset, the guide plate 22 drives the mounting column 25 connected to its bottom surface to move upward, the slot 26 and the second slot on the mounting column 25 move upward synchronously, the conduction area between one side of the slot 26 and the connecting hole 27 returns to the preset value, thereby restoring the air pressure at the output end of the air pressure pipe 9 to the preset value, the discharge volume at the output end of the spray pipe 12 to the preset value, and the device continues to carry out the granulation work of the lean slag.

[0094] By connecting the guide plate 22 to the mounting column 25, and connecting the mounting ring at the bottom of the mounting column 25 to the bottom wall via a return spring, the buffering effect of the guide plate 22 after being impacted by large-diameter lean slag particles is improved; the sliding seal between the mounting column 25 and the mounting hole improves the sealing effect of the device and prevents gas and liquid leakage during operation; by opening a slot 26 and a second slot on the mounting column 25, with the two sides of the slot 26 communicating with the connecting hole 27 and the exhaust hole 28 respectively, and the two sides of the second slot communicating with the second connecting hole and the drain hole 29 respectively, the number of valve parts is reduced, and the cost is lowered. The production cost of the device is reduced by opening slots 26 and 27 on the mounting column 25, with the connecting hole 27 and the exhaust hole 28 coaxially arranged, the slots 26 and the connecting hole 27 staggered, the second connecting hole and the drain hole 29 coaxially arranged, and the second slot and the second connecting hole staggered. The increase in large-diameter lean slag particles causes the guide plate 22 to move downward, increasing the exhaust volume of the exhaust hole 28 and the drain volume of the drain hole 29. This makes it easier for the device to adjust the air intake and liquid intake according to the actual situation, improving the automatic adjustment effect of the device, and reducing the difficulty of gas and liquid adjustment within the device.

[0095] It also includes: a filter element 31; the filter element 31 includes: a filter screen 32, a hollow cooling roller 33, a vibrating plate 34, and a collector 35. The other side wall of the baffle 21 is connected to the end of the filter screen 32. The other end of the filter screen 32 is set towards the top surface of the scraper conveyor 6. The two side walls of the filter screen 32 are respectively connected to one inner wall of the hopper 5. Multiple hollow cooling rollers 33 are provided on the bottom surface of the filter screen 32. The hollow cooling rollers 33 are rotatably installed on the inner wall of the hopper 5. The two ends of the hollow cooling rollers 33 are rotatably connected to the cooling device. One end of the hollow cooling roller 33 that extends out of the side wall of the hopper 5 is equipped with a pulley. The pulley is connected to the output end of the third motor through a belt. The third motor is installed on the side wall of the hopper 5. Multiple vibrating plates 34 are connected to the side wall of the hollow cooling roller 33. The ends of the vibrating plates 34 are in frictional contact with the bottom surface of the filter screen 32 or the top surface of the collector 35. The bottom surface of the collector 35 is connected to the worktable. The top side wall of the collector 35 is connected to the bottom inner wall of the hopper 5.

[0096] The principles and beneficial effects of the above technical solution are as follows:

[0097] After the granulation of the lean slag by the air pressure component 3 and the spray component 4, the lime in the lean slag particles reacts with water to form calcium hydroxide. Under the residual heat within the device, the calcium hydroxide is dried to form powdered calcium hydroxide. Small-diameter lean slag particles fall onto the filter screen 32 on the other side wall of the baffle 21. Through impact with the filter screen 32, the calcium hydroxide powder in the small-diameter lean slag particles is crushed and separated, improving the purity of the recovered lean slag particles and reducing subsequent processing steps. The mesh diameter of the filter screen 32 is smaller than the particle size of the lean slag particles, preventing… The lean slag particles become stuck on the filter screen 32. The filter screen 32 is installed inside the hopper 5 with one end tilted downwards to facilitate the collection and conveying of the lean slag particles by the scraper conveyor 6. Multiple hollow cooling rollers 33 are located below the filter screen 32, and multiple vibrating plates 34 are installed on the side walls of the hollow cooling rollers 33. Both ends of the hollow cooling rollers 33 are connected to a cooling device. As the temperature of the hollow cooling rollers 33 decreases, the temperature of the vibrating plates 34 decreases simultaneously. The top surface of the filter screen 32 has a higher temperature than the bottom surface. Under the action of hot and cold air convection, the mesh of the filter screen 32 generates airflow from top to bottom, facilitating the separation of hydrogen and oxygen. The calcium hydroxide powder is drawn to the bottom of the filter screen 32, improving the reliability and automation of the device. When there is too much calcium hydroxide powder on the top surface of the filter screen 32, the frictional contact between the vibrating plate 34 and the bottom of the filter screen 32 facilitates the vibration of the calcium hydroxide powder clogging the mesh, further improving the reliability of the device. Due to the low temperature of the hollow cooling roller 33 and the presence of moisture in the air, water droplets easily condense on the surface of the hollow cooling roller 33. Some calcium hydroxide powder falls onto the hollow cooling roller 33 and turns into a calcium hydroxide solution upon contact with water. The calcium hydroxide solution is then passed through the vibrating plate 34. The calcium hydroxide powder enters the collection unit 35 through centrifugal force, while the remaining calcium hydroxide powder passes through the mesh and enters the collection unit 35 directly. The hollow cooling roller 33 with condensate facilitates the collection of calcium hydroxide powder, improving the recovery efficiency of the device. The vibrating plate 34 on the hollow cooling roller 33 improves the conveying efficiency of the calcium hydroxide solution. The vibrating plate 34 on the side wall of the hollow cooling roller 33 is set in an arc shape. While the hollow cooling roller 33 rotates, the rotation of the vibrating plate 34 creates a negative pressure at the bottom of the filter screen 32, further improving the adsorption effect of the device on calcium hydroxide powder.

[0098] The collecting component 35 includes: a collecting box 36, a guide arc 37, a collecting box 38, a second filter screen 39, a grid 40, and a baffle 41. The inner wall of the bottom surface of the hopper 5 is connected to the top side wall of the collecting box 36. The bottom surface of the collecting box 36 is connected to the top surface of the workbench. The top surface of the collecting box 36 has multiple collecting grooves. The collecting grooves are arranged parallel to the vibrating plate 34. The inner wall of the collecting groove facing the baffle 21 is equipped with a guide arc 37. The top of the guide arc 37 is equipped with a baffle 41. The end of the vibrating plate 34 is in frictional contact with the top surface of the collecting box 36 or the top side wall of the baffle 41. The bottom end of the guide arc 37 is placed inside the collecting box 36. The collecting box 38 is slidably connected inside the side wall of the collecting box 36 with a through groove. The side wall of the collecting box 38 is equipped with a handle. The side wall of the collecting box 38 inside the collecting box 36 is equipped with a second filter screen 39. The second filter screen 39 is arranged facing the grid 40 on the other side wall of the collecting box 36.

[0099] The principles and beneficial effects of the above technical solution are as follows:

[0100] Calcium hydroxide solution and calcium hydroxide powder enter the collection tank 36 through a collection groove on the top surface of the collection tank 36. The inner wall of the collection groove facing the baffle 21 is equipped with a guide arc 37. When calcium hydroxide solution remains on the top surface of the collection tank 36, it moves away from the baffle 21 due to gravity and falls onto the top surface of the guide arc 37. The calcium hydroxide solution is guided into the collection tank 36 by the guide arc 37. A baffle 41 is provided at the top of the guide arc 37, which can guide the calcium hydroxide solution... The baffle 41, when its top sidewall rubs against the end of the vibrating plate 34, rebounds the calcium hydroxide solution into the collection tank. The baffle 41 prevents the calcium hydroxide solution from becoming too large and flowing too fast, thus ensuring the collection tank can effectively recover it. The vibrating plate 34 rubs against the top surface of the collection box 36, vibrating the calcium hydroxide powder on the top surface of the collection box 36 and causing it to enter the collection tank. Simultaneously, the rotation of the vibrating plate 34 generates air pressure on the top surface of the collection box 36, which in turn affects the calcium hydroxide solution located around the collection tank. Calcium hydroxide powder can be used for auxiliary blowing to improve the cleanliness of the surface of the collection box 36. When the device is working, the rotation of the vibrating plate 34 generates air pressure that blows into the collection box 36. At the same time, the airflow generated by the hot and cold convection in the device generates airflow that blows into the collection box 36. A second filter screen 39 is set on the side wall of the collection box 38, which is set towards the grid 40 on the other side wall of the collection box 36. This allows the air pressure and airflow in the collection box 38 to be discharged outside the device, which can prevent the temperature inside the collection box 38 from becoming too high and deforming. At the same time, the calcium hydroxide solution in the collection box 38 can be dried to form calcium hydroxide powder again, reducing the water removal process of the device. By setting the second filter screen 39, some calcium hydroxide powder can be prevented from being blown out of the device and causing environmental pollution. After the granulation work is completed, the hollow cooling roller 33 can continue to rotate, and the vibrating plate 34 can be used to cool the collection box 38, thereby reducing the temperature of the handle and facilitating the rapid discharge of residual heat in the collection box 38 from the grid 40, preventing the collection box 38 from burning the staff when it is taken out.

[0101] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A steel slag granulation process, characterized in that, Includes the following steps: Step A: The high-temperature molten lean slag is injected into the hopper (5) through the flow channel. Step B: At the feed end of the hopper (5), compressed gas is used to break the high-temperature molten slag into slag particles. Step C: Cooling water is used above the hopper (5) to cool the depleted slag particles to room temperature depleted slag; Step D: Recover the room temperature lean slag; In step C, when cooling water is used above the hopper (5) to cool the slag particles to room temperature, the generated flue gas is collected uniformly through the flue gas outlet, which is located above the hopper (5). In step B, before using compressed gas above the hopper (5) to break the high-temperature molten lean slag into lean slag particles, the compressed gas can be compressed air or compressed nitrogen. Adjust the flow direction of the compressed air or compressed nitrogen so that the flow direction of the compressed air or compressed nitrogen intersects with the pre-flow path of the high-temperature molten lean slag. In step C, before cooling the slag particles to room temperature using cooling water above the hopper (5), the spray direction of the cooling water is adjusted so that the spray direction of the cooling water intersects with the pre-flow path of the high-temperature molten slag. In step A, when the high-temperature molten lean slag is injected into the hopper (5) through the flow channel, the flow rate of the high-temperature molten lean slag is 25-75 t / h. In step D, when recycling the room temperature lean slag, a scraper conveyor (6) is used for transfer. A steel slag granulation treatment device is used to realize the process of steps A to D; the steel slag granulation treatment device includes: a hopper (5) and a scraper conveyor (6), the hopper (5) and the directional component (1) are set on the worktable, the directional component (1) is connected to a box (2), and the box (2) is equipped with a wind pressure component (3) and a spray component (4) from top to bottom. The output ends of the wind pressure component (3) and the spray component (4) are both set towards the hopper (5), and the bottom end of the hopper (5) is set towards the top end of the scraper conveyor (6); The air pressure component (3) includes: an air inlet pipe (7), an air guide pipe (8), and an air pressure pipe (9). The air inlet pipe (7) is installed in the through hole of the side wall of the box (2). The end of the air inlet pipe (7) is connected to one side of multiple air guide pipes (8). The end of the air guide pipe (8) is connected to the inner wall of the box (2). Multiple air pressure pipes (9) are connected to the other side of the air guide pipe (8). The output end of each air pressure pipe (9) extends to the other side wall of the box (2). The spraying component (4) includes: an inlet pipe (10), a guide pipe (11), and a spray pipe (12). The inlet pipe (10) is installed in the second through hole on the side wall of the box (2). The end of the inlet pipe (10) is connected to one side of a plurality of guide pipes (11). The end of the guide pipes (11) is connected to the inner wall of the box (2). A plurality of spray pipes (12) are connected to the other side of the guide pipes (11). The output end of each spray pipe (12) extends out to the other side wall of the box (2). The output end of the spray pipe (12) is connected to a fan-shaped nozzle (30). The directional component (1) includes: a mounting column (13) and a gear ring (14). The mounting column (13) is rotatably connected to the workbench. The gear ring (14) on the mounting column (13) meshes with a gear. The gear is installed at the output end of the motor. The motor is installed on the workbench. The top of the mounting column (13) is connected to the bottom surface of the housing (2) through an angle component (15). The angle component (15) includes: a hemisphere (16), a toothed arc (17), and a guide post (18). The top end of the mounting post (13) is connected to the bottom end of the guide post (18). The top end of the guide post (18) has a hemisphere groove, and the bottom wall of the hemisphere groove has an arc groove. The side wall of the guide post (18) has an installation groove, and the installation groove is connected to the bottom wall of the arc groove. A second gear is provided in the installation groove, and the second gear is connected to the output end of the second motor. The second motor is installed on the side wall of the guide post (18). The second gear is meshed with the toothed arc (17), and the toothed arc (17) is installed at the bottom end of the hemisphere (16). The top end of the hemisphere (16) is connected to the bottom surface of the housing (2) through the mounting post. It also includes: unloading component (20); the unloading component (20) includes: baffle (21), guide plate (22), unloading plate (23) and adjusting component (24); The adjusting component (24) includes: a mounting post (25), a slot (26), a connecting hole (27), an exhaust hole (28), and a drain hole (29). The bottom surface of the guide plate (22) is connected to the mounting post (25). The mounting hole at the top of the workbench is slidably sealed to the mounting post (25). The mounting ring at the bottom of the mounting post (25) is slidably connected to the limiting hole. The bottom surface of the mounting ring is connected to the bottom wall of the limiting hole by a return spring. The mounting post (25) has a slot (26) and a second slot longitudinally opened on its side wall. The longitudinally opened connecting hole (27) and the second connecting hole are both connected to one side of the mounting hole. The longitudinally opened exhaust hole (28) and drain hole (29) on the other side wall of the workbench are both connected to the other side of the mounting hole. The slot (26) is staggered with the coaxial connecting hole (27) and exhaust hole (28). The second slot is staggered with the coaxial second connecting hole and drain hole (29). The exhaust hole (28) is connected to the air inlet pipe (7) through a conduit. The drain hole (29) is connected to the liquid inlet pipe (10) through a second conduit. The air supply device connected to the end of the connecting hole (27) supplies air to the connecting hole (27). The gas enters the exhaust hole (28) through the mounting hole and the slot (26). The end of the exhaust hole (28) supplies air to the air inlet pipe (7) through the conduit. The liquid supply device connected to the end of the second connecting hole supplies liquid to the second connecting hole. The liquid enters the drain hole (29) through the second slot of the mounting hole. The end of the drain hole (29) supplies liquid to the inlet pipe (10) through the second conduit.

2. The steel slag granulation process according to claim 1, characterized in that, The pressure of the compressed air or compressed nitrogen is 2-2.5 MPa.

3. The steel slag granulation process according to claim 1, characterized in that, The hydraulic pressure of the cooling water is 0.5-0.9 MPa.

Images