Slag screening system and screening device

Abstract

This invention discloses a slag screening system and its screening device, comprising: a rotating plate with its rotation axis fixedly set; a storage spring, one end of which is connected to one end of the rotating plate, and the other end of which is fixedly set; and a disc that can be driven to rotate by a power source, having a notch forming two parts: a solid area and a defect area, with one side where the solid area and the defect area intersect serving as a storage surface. When the disc rotates at a constant speed, the storage surface pushes the rotating plate to rotate, overcoming the elastic force of the storage spring. This invention intermittently stores force in the storage spring, causing the rotating plate to intermittently and suddenly rotate and strike the slag. The struck slag slides away from the rotating plate, forming slag particles at different distances from the plate. This overcomes the problem of large differences between expanded beads processed from slag of similar shape, achieving the effect of reducing the differences between expanded beads and improving the quality as a lightweight aggregate material for concrete.

Description

Technical Field

[0001] This invention relates to the field of slag processing equipment technology, and in particular to slag screening systems and screening devices. Background Technology

[0002] Blast furnace slag, also known as blast furnace slag, is the waste residue discharged from the blast furnace during pig iron smelting. Blast furnace slag can be processed into valuable materials with multiple uses through various processes. For example, after being quenched with a large amount of water, it can be made into fine-grained slag containing mainly glass particles, which is a high-quality cement raw material. Alternatively, it can be processed into porous expanded slag, which, after crushing and screening, becomes lightweight aggregate for concrete. The crushed slag after screening can also be further processed to form particles of varying sizes with micropores and smooth surfaces (commonly known as expanded beads). The production process of expanded beads involves hot molten slag entering a chute, being rapidly cooled by water spray, then being crushed and thrown by a high-speed rotating drum and continuing to cool. During this process, the molten slag expands on its own and cools into beads.

[0003] Patent document CN211887874U discloses a slag screening device, which mainly uses screens with different apertures to classify and screen slag of different shapes, thereby screening out slag with expected shapes and similar shapes. Using this device, blast furnace slag can be screened directly, thereby screening out slag with particle sizes within a predetermined range for use as lightweight aggregate in concrete. However, there are significant differences in density and quality among slag with similar particle sizes. The slag with similar shapes that has been screened is further processed into expanded beads. The expanded beads obtained from slag with different densities and qualities after the expanded bead manufacturing process are different. The significantly different expanded beads reduce the quality of the expanded beads as lightweight aggregate material in concrete. Summary of the Invention

[0004] The purpose of this invention is to propose a slag screening system and its screening device, which performs a second screening on slag after it has been screened by a sieve, and selects slag with similar quality to manufacture expanded beads, thereby reducing the differences between the expanded beads and improving their quality as a lightweight aggregate material for concrete.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A slag screening system and its screening device, including:

[0007] A rotating plate, wherein the axis of rotation of the rotating plate is fixedly set;

[0008] A storage spring, one end of which is connected to one end of the rotating plate, and the other end is fixedly installed;

[0009] A disk that can be driven to rotate by a power source has a notch, forming two parts: a solid region and a defect region. One side where the solid region and the defect region intersect is a power storage surface.

[0010] When the disc rotates at a constant speed, the energy storage surface pushes the rotating plate to rotate so that it overcomes the elastic force of the energy storage spring. When the rotating plate rotates to the defect area, the energy storage spring pulls the rotating plate to rotate back and makes the rotating plate contact the energy storage surface again. Then, the other end of the rotating plate suddenly strikes the slag waiting to be screened when it rotates back.

[0011] Preferably, the slag screening system further includes:

[0012] Base plate;

[0013] A straight plate, wherein the straight plate is fixedly and perpendicularly connected to the base plate;

[0014] Two first horizontal plates are fixed on the straight plate, and the disc is rotatably connected between the two first horizontal plates;

[0015] The second horizontal plate is fixed on the straight plate and located below the first horizontal plate. It has a through groove, and the rotating plate is rotatably connected inside the through groove.

[0016] A sliding block is provided between the first horizontal plate and the second horizontal plate, and the other end of the energy storage spring is fixedly connected to the sliding block.

[0017] Preferably, the first horizontal plate and the second horizontal plate have the following relationship:

[0018] A fixed rod, the two ends of which are fixedly connected to the first horizontal plate and the second horizontal plate, respectively;

[0019] A threaded rod, one end of which is rotatably connected to the second horizontal plate, and the other end of which passes through the first horizontal plate and is equipped with a handle;

[0020] A sliding block is fitted onto the outer wall of the fixed rod and is provided with a nut, which is threadedly connected to the threaded rod;

[0021] The sliding block can slide between the first horizontal plate and the second horizontal plate by rotating the handle.

[0022] Preferably, the base plate is provided with:

[0023] The two upright plates are fixed to the base plate and cooperate with the straight plate to form an enclosed outer wall on all four sides;

[0024] Multiple equidistant receiving slots are provided, and each receiving slot is at a different distance from the rotating plate;

[0025] The same number of rectangular plates as the receiving groove, with their top surfaces flush with the top surface of the receiving groove, are fixedly connected to each other;

[0026] An electric telescopic rod, mounted on the base plate, is capable of driving the rectangular plate to slide and thus open the top of the receiving slot.

[0027] Preferably, a limiting sliding cover is provided on the side of the rotating plate away from the energy storage spring, forming a placement area between the cover and the rotating plate for temporarily placing slag awaiting screening. A protrusion with an upper arc surface is fixed on the base plate, and the side of the cover that contacts the protrusion is a rounded edge. When the rotating plate rotates to its maximum, the cover moves upward under the contact of the protrusion, leaving a temporary channel for the slag to slide out of the placement area between it and the base plate. A filling plate is fixed at the angle between the base plate and the straight plate. The filling plate has an arc surface that matches the rotation trajectory of the end of the rotating plate.

[0028] The slag screening device includes the slag screening system and a collection box, wherein multiple partitions are fixedly connected inside the collection box, corresponding to different receiving tanks.

[0029] The slag screening method includes the following steps:

[0030] The drive disc rotates at a constant speed, and the storage spring intermittently stores elastic force, which intermittently pulls the rotating plate to rotate sharply. When the rotating plate rotates, it hits the slag waiting to be screened on the front side of the rotating plate, causing the slag to slide away from the rotating plate.

[0031] Preferably, the two ends of the storage spring are adjusted to change the distance between the two ends of the storage spring, thereby increasing or decreasing the initial elastic force of the storage spring, and thus adjusting the force exerted by the rotating plate on the slag.

[0032] Preferably, a sliding stop cover is provided on the front side of the rotating plate. The slag to be screened is placed between the rotating plate and the stop cover. When the rotating plate rotates to its maximum, the stop cover slides up and leaves a temporary channel for the slag to slide out between it and the bottom plate.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. This invention intermittently stores energy in the storage spring, causing the rotating plate to rotate suddenly and strike the slag intermittently. The struck slag slides away from the rotating plate, forming slag at different distances from the rotating plate. This overcomes the problem of large differences between expanded beads processed from slag of similar shape, achieving the effect of reducing the differences between expanded beads and improving the quality of the slag as a lightweight aggregate material for concrete.

[0035] 2. This invention allows for quality screening of slag of different shapes by adjusting the linear distance between the two ends of the storage spring. For smaller slag, the storage spring needs to be adjusted so that the distance between its two ends is closer, resulting in less kinetic energy from the sudden rotation of the rotating plate and preventing excessive kinetic energy from hitting the slag and causing it to splash directly. For larger slag, the storage spring needs to be adjusted so that the distance between its two ends is farther, resulting in greater kinetic energy from the sudden rotation and preventing insufficient rotation from hitting the slag and preventing it from sliding and separating. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the slag screening system and its screening device proposed in this invention;

[0037] Figure 2 This is a schematic diagram of the internal structure of the two vertical plates in the slag screening system and screening device proposed in this invention.

[0038] Figure 3 This is a schematic diagram of a partial structure of the slag screening system and its screening device proposed in this invention.

[0039] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0040] Figure 5 for Figure 3 Enlarged structural diagram at point B;

[0041] Figure 6 This is a schematic diagram of the disc structure in the slag screening system and screening device proposed in this invention.

[0042] In the diagram: 1. Base plate; 2. Straight plate; 3. Rotating plate; 4. Energy storage spring; 5. Disc; 6. Notch; 7. Energy storage surface; 8. First horizontal plate; 9. Second horizontal plate; 10. Through slot; 11. Fixing rod; 12. Threaded rod; 13. Handle; 14. Sliding block; 15. Nut; 16. Filling plate; 17. Vertical plate; 18. Receiving slot; 19. Rectangular plate; 20. Connecting plate; 21. Electric telescopic rod; 22. Collection box; 23. Partition; 24. Cover; 25. Limiting slot; 26. Limiting block; 27. Protrusion; 28. Rotating motor. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] Reference Appendix Figure 1-2 and attached Figure 6 The slag screening system includes a base plate 1 and a straight plate 2, which are fixedly and vertically connected to each other. A rotatable rotating plate 3 is set in the area between the base plate 1 and the straight plate 2. The rotation of the rotating plate 3 is not obstructed by the base plate 1 or the straight plate 2. A power storage component is set on one side of the straight plate 2. The power storage component includes a power storage spring 4. One end of the power storage spring 4 is fixedly connected to the rotating plate 3, and the other end is fixed to a point in the area between the base plate 1 and the straight plate 2. This point in the area can be a point on the base plate 1 or a point on the straight plate 2. The power storage spring 4 restricts the free rotation. The power storage component also includes a driveable rotating disk 5 in the area between the base plate 1 and the straight plate 2. The disk 5 has a notch 6, so that the disk 5 has a solid area and a defect area. One end face of the solid area is the power storage surface 7. The disk 5 rotates in the direction of the following direction. Figure 3 The arrow indicates the direction. The force-storing surface 7 contacts the rotating plate 3, causing it to rotate despite the elastic force of the force-storing spring 4. The disc 5 continues to rotate. The rotating plate 3 disengages from the force-storing surface 7, but one end of the rotating plate 3 slides against the outer edge of the solid area of ​​the disc 5 until one end of the rotating plate 3 enters the defect area of ​​the disc 5. At this moment, it loses the resistance force of the disc 5 and, under the elastic force of the force-storing spring 4, suddenly rotates back and contacts the force-storing surface 7 of the disc 5 again. The uniform rotation of the disc 5 causes the rotating plate 3 to intermittently and suddenly rotate back. This causes the slag at the other end of the rotating plate 3 to be suddenly struck. The slag is struck by the rotating plate 3 and slides away from the rotating plate 3. Since the slag has been screened by particle size and has a similar size, the slag will inevitably have different masses when there is a difference in density. Since the striking force of the rotating plate 3 is the same, the lighter slag slides a farther distance and the heavier slag slides a shorter distance. Different screening ranges are divided according to the sliding distance, so that slag with similar density and mass can be selected under the premise of similar size.

[0045] Specifically, the straight plate 2 is fixedly connected to two first horizontal plates 8, the disc 5 is rotatably connected between the two first horizontal plates 8 and is driven to rotate by the rotating motor 28, the straight plate 2 is also fixedly connected to a second horizontal plate 9, the second horizontal plate 9 has a through groove 10, and the rotating plate 3 is rotatably connected in the through groove 10.

[0046] Reference Appendix Figure 3-4A fixed rod 11 and a threaded rod 12 are respectively arranged between the first horizontal plate 8 and the second horizontal plate 9. The two ends of the fixed rod 11 are fixedly connected to the first horizontal plate 8 and the second horizontal plate 9, respectively. The threaded rod 12 is rotatably connected to the first horizontal plate 8 and the second horizontal plate 9, and passes through the first horizontal plate 8. A controllable handle 13 is fixed to the end face through which the threaded rod 12 passes. A sliding block 14 is arranged between the fixed rod 11 and the threaded rod 12. One end of the storage spring 4 is fixedly connected to the sliding block 14. The sliding block 14 is slidably sleeved on the outer peripheral wall of the fixed rod 11 and threadedly connected to the threaded rod 12. Specifically, a nut 15 adapted to the threaded rod 12 is fixedly connected to the sliding block 14. The nut 15 is threadedly connected to the threaded rod 12. The rotation of the handle 13 drives the threaded rod 12. The rotation of the rod 12 causes the sliding block 14 to slide between the first horizontal plate 8 and the second horizontal plate 9, thereby adjusting the elastic force of the storage spring 4. The greater the distance between the two ends of the storage spring 4, the greater the elastic force, and the greater the kinetic energy of the sudden rotation of the rotating plate 3. This allows for quality screening of slag of different shapes. Generally speaking, for smaller slag, the storage spring 4 needs to be adjusted so that the distance between its two ends is closer, so that the kinetic energy of the sudden rotation of the rotating plate 3 is smaller, preventing excessive rotational energy from hitting the slag and causing it to splash directly. For larger slag, the storage spring 4 needs to be adjusted so that the distance between its two ends is farther, so that the kinetic energy of the sudden rotation is larger, preventing insufficient rotational energy from hitting the slag and preventing it from sliding and separating.

[0047] A filling plate 16 is set at the inside corner of the base plate 1 and the straight plate 2. The two sides of the filling plate 16 are fixedly connected to the base plate 1 and the straight plate 2 respectively. It has an arc surface, which is adapted to the rotation trajectory of the end of the rotating plate 3. The arc surface can contact one end of the rotating plate 3 to prevent the slag from sliding to the inside corner of the base plate 1 and the straight plate 2, and play the role of determining the position of the slag waiting to be hit.

[0048] To ensure that the slag slides in a straight line on the base plate 1 due to the impact of the rotating plate 3, two vertical plates 17 are fixed on both sides of the base plate 1 to prevent the slag from sliding off the base plate 1 due to the impact.

[0049] Multiple equidistant receiving slots 18 are formed on the base plate 1. Rectangular plates 19 are placed inside the receiving slots 18, with the top surface of the rectangular plates 19 flush with the top surface of the receiving slots 18. This prevents slag that should have slid further away from the receiving slots from falling due to contact with the opening of the receiving slots 18. The rectangular plates 19 extend outward from the same side and are fixed to the same connecting plate 20. An electric telescopic rod 21 is installed on the base plate 1, with its telescopic end fixedly connected to the connecting plate 20. The electric telescopic rod 21 can drive the movement of the connecting plate 20 and simultaneously move the rectangular plates 19 to translate and detach them from the receiving slots. The trough 18 allows the slag that is slid by the rotating plate 3 to fall into the various receiving troughs 18, thereby automatically collecting slag of different qualities. The receiving trough 18 has two openings, one facing the top surface of the bottom plate 1 and the other facing the side of the bottom plate 1. The slag automatically collected in the receiving trough 18 can be directly taken out from one of the openings. The screening device includes a collection box 22 fixed to the side of the bottom plate 1, and multiple partitions 23 are fixedly connected in the collection box 22, corresponding to different openings of the receiving trough 18, so as to facilitate the automatic collection of large quantities of screened slag in each receiving trough 18.

[0050] Reference Appendix Figure 5 A slidable cover 24 is provided on the front side of the rotating plate 3. Specifically, the cover 24 has two deflected sides, and limiting grooves 25 are opened on both sides, forming an approximately "convex" shape. Two limiting blocks 26 are fixed on the front side of the rotating plate 3, which are adapted to the limiting grooves 25 and are slidably connected to the limiting grooves 25. There is a vertically connected placement area between the cover 24 and the front side of the rotating plate 3, in which slag to be screened can be placed. A protrusion 27 with an upper arc surface is fixed on the base plate 1. The side of the cover 24 that contacts the protrusion 27 is set as a rounded edge to facilitate contact with the upper arc surface of the protrusion 27 and relative sliding between it and the rotating plate 3. The cover 24 that slides relative to the base plate 1 will leave a temporary channel for the slag to slide out of the placement area.

[0051] Working principle:

[0052] A slag of similar size is placed in front of the rotating plate 3, which is the side of the rotating plate 3 away from the energy storage spring 4. The rotating motor 28 is started, which drives the disc 5 to rotate, thereby pushing the rotating plate 3 to rotate accordingly and pulling the energy storage spring 4. When the rotating plate 3 rotates from the solid area of ​​the disc 5 to the defect area, the energy storage spring 4 suddenly pulls the rotating plate 3 back, and the rotating plate 3 suddenly rotates back until it is perpendicular to the bottom plate 1. Then it hits the slag in the area in front of it. The slag is impacted by the rotating plate 3 and moves away from the rotating plate 3 at high speed, sliding to different positions on the bottom plate 1. Different screening ranges are divided according to the sliding distance, so that slag with similar density and mass can be selected under the premise of similar size.

[0053] The initial elastic force of the storage spring 4 can be adjusted. The initial elastic force is the elastic force of the storage spring 4 on the rotating plate 3 when the rotating plate 3 is perpendicular to the bottom plate 1. The greater the adjustment distance between the two ends of the storage spring 4, the greater the impact force on the slag when the rotating plate 3 suddenly rotates, thus adapting to slag of different shapes.

[0054] Slag of similar size is poured into the placement area, ensuring that it does not overflow from the top of the area as it rotates with the rotating plate 3. The rotating motor 28 is started, driving the disc 5 to rotate, which in turn drives the rotating plate 3 to rotate and pulls the storage spring 4. When the rotating plate 3 rotates from the solid area of ​​the disc 5 to the defect area, the storage spring 4 pulls the rotating plate 3 back suddenly, and the rotating plate 3 rotates back until it is perpendicular to the bottom plate 1. The cover 24 moves up slightly and leaves a temporary channel, allowing a small amount of slag at the bottom of the placement area to move away from the rotating plate 3 under the pushing force of the rotating plate 3 and slide to different positions on the bottom plate 1. Different screening ranges are divided according to the sliding distance, so that slag of similar density and mass can be selected under the premise of similar size.

[0055] It should be noted that the difference in setting the baffle 24 lies in changing the way the rotating plate 3 acts on the slag. Without the baffle 24, the rotating plate 3 impacts the stationary slag by suddenly rotating. After setting the baffle 24, the slag placed in the placement area of ​​the baffle 24 will synchronously follow the rotation of the rotating plate 3, changing from the original impact method to a pushing method. This reduces the severe wear of the rotating plate 3 due to long-term impact on the harder slag. At the same time, the pushing method pushes a small amount of slag at the bottom of the placement area each time, unlike the direct impact on a group of slag. This effectively and precisely pushes each individual slag, thereby reducing the mutual collision between individual slag pieces and affecting the final sliding position of the slag on the bottom plate 1.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A slag screening system, characterized in that, include: Rotating plate (3), the rotation axis of the rotating plate (3) is fixedly set; A storage spring (4) is provided, one end of which is connected to one end of the rotating plate (3), and the other end is fixedly installed. The disk (5) can be driven to rotate by power. It has a notch (6) to form two parts: a solid area and a defect area. One side of the solid area and the defect area intersects is the energy storage surface (7). When the disc (5) rotates at a constant speed, the energy storage surface (7) pushes the rotating plate (3) to rotate so that it overcomes the elastic force of the energy storage spring (4). When the rotating plate (3) rotates to the defect area, the energy storage spring (4) pulls the rotating plate (3) to rotate back and makes the rotating plate (3) contact the energy storage surface (7) again. Then, the other end of the rotating plate (3) suddenly slaps the slag waiting to be screened when it rotates back. Base plate (1); Straight plate (2), the straight plate (2) is fixedly and vertically connected to the base plate (1); Two first horizontal plates (8) are fixed on the straight plate (2), and the disc (5) is rotatably connected between the two first horizontal plates (8); The second horizontal plate (9) is fixed on the straight plate (2) and located below the first horizontal plate (8), and has a through groove (10). The rotating plate (3) is rotatably connected inside the through groove (10). A sliding block (14) is provided between the first horizontal plate (8) and the second horizontal plate (9), and the other end of the energy storage spring (4) is fixedly connected to the sliding block (14); A limiting sliding cover (24) is provided on the side of the rotating plate (3) away from the energy storage spring (4). A placement area is formed between the cover (24) and the rotating plate (3) for temporarily placing slag waiting to be screened. A protrusion (27) with an upper arc surface is fixed on the base plate (1), and the side of the cover (24) that contacts the protrusion (27) is a rounded edge. When the rotating plate (3) rotates to its maximum, the cover (24) moves upward under the contact of the protrusion (27), leaving a temporary channel for the slag to slide out of the placement area between it and the base plate (1). A filling plate (16) is fixed at the angle between the base plate (1) and the straight plate (2). The filling plate (16) has an arc surface, and the arc surface of the filling plate (16) is adapted to the rotation trajectory of the end of the rotating plate (3).

2. The slag screening system according to claim 1, characterized in that, The first horizontal plate (8) and the second horizontal plate (9) have the following characteristics: The fixed rod (11) is fixedly connected at both ends to the first horizontal plate (8) and the second horizontal plate (9), respectively; A threaded rod (12) has one end rotatably connected to the second horizontal plate (9) and the other end passes through the first horizontal plate (8) and is equipped with a handle (13). A sliding block (14) is sleeved on the outer wall of the fixed rod (11) and is provided with a nut (15), which is threadedly connected to the threaded rod (12); The sliding block (14) can slide between the first horizontal plate (8) and the second horizontal plate (9) by rotating the handle (13).

3. The slag screening system according to claim 2, characterized in that, The base plate (1) is provided with: Two upright plates (17) are fixed on the base plate (1) and cooperate with the straight plate (2) to form an enclosed outer wall on all four sides; Multiple equidistant accommodating slots (18) are provided, and each accommodating slot (18) is at a different distance from the rotating plate (3); The same number of rectangular plates (19) as the receiving groove (18) have their top surfaces flush with the top surface of the receiving groove (18), and the rectangular plates (19) are fixedly connected to each other. An electric telescopic rod (21), mounted on the base plate (1), is capable of driving the rectangular plate (19) to slide and thus open the top of the receiving slot (18).

4. A slag screening device, characterized in that, The slag screening system according to claim 3 further includes a collection box (22), wherein multiple partitions (23) are fixedly connected inside the collection box (22), corresponding to different receiving slots (18).

5. A slag screening method, characterized in that, The slag screening system according to claim 3 includes the following steps: The drive disc (5) rotates at a constant speed, and the storage spring (4) intermittently stores elastic force and intermittently pulls the rotating plate (3) to rotate suddenly. When the rotating plate (3) rotates, it hits the slag waiting to be screened on the front side of the rotating plate (3), causing the slag to slide away from the rotating plate (3).

6. The slag screening method according to claim 5, characterized in that, Adjust the two ends of the storage spring (4) to change the distance between the two ends of the storage spring (4), increase or decrease the initial elastic force of the storage spring (4), thereby adjusting the force of the rotating plate (3) on the slag.

7. The slag screening method according to claim 6, characterized in that, A sliding stop cover (24) is set on the front side of the rotating plate (3). The slag waiting to be screened is placed between the rotating plate (3) and the stop cover (24). When the rotating plate (3) rotates to its maximum, the stop cover (24) slides up and leaves a temporary channel for the slag to slide out between it and the bottom plate (1).

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