A silicon iron feeding device for a high silicon content system of molten iron in a blast furnace

Abstract

The utility model relates to metallurgical ironmaking technical field more specifically, relate to a kind of ferrosilicon feeding device for blast furnace hot metal stream silicon-increasing system. Including storage tank, and the belt scale installed in the lower of storage tank, the inner wall of storage tank is fixed sequentially from top to bottom and installs bag opener and vibrating screen, vibrating screen includes screen cylinder, screen cylinder outer wall is connected by elastic connecting piece storage tank inner wall, screen cylinder outer wall installs vibration motor, storage tank and the periphery of belt scale are provided with support frame. The utility model realizes the continuous operation of the accurate feeding of ferrosilicon from bagged feeding, reduces manual intervention process such as bagging, handling, to significantly improve efficiency, conveying belt and weighing system ensure that ferrosilicon is evenly, controllably conveyed to hot metal stream;Through vibrating screen, ensure that ferrosilicon granularity meets the granularity requirement of efficient silicon-increasing, to improve reaction specific surface area and silicon-increasing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical ironmaking technology, and more specifically, to a ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system. Background Technology

[0002] In the silicon enhancement process of blast furnace hot metal, the traditional method commonly uses manual addition of bagged ferrosilicon (1 ton / bag): during the operation, workers must directly pour the entire bag of ferrosilicon into the molten iron trough or ladle. This method has the following significant drawbacks: because the ferrosilicon is added in a concentrated bag, it is difficult to melt and diffuse quickly in the molten iron, resulting in fluctuations in local silicon concentration. Some ferrosilicon fails to fully contact the molten iron, forming unmelted lumps, resulting in an actual silicon yield of less than 50%, and large fluctuations in the final silicon content (±0.15%). This leads to uneven dispersion and low reaction efficiency. Furthermore, manually controlling the valve opening in a high-temperature environment poses occupational health risks such as burns and silicon dust inhalation. The operation is inefficient and cannot meet the fast-paced production demands of blast furnaces. Manual addition relies on the operator's experience and judgment, easily leading to over-addition, which not only wastes ferrosilicon (increasing consumption by 150-200 grams per ton of iron) but also causes excessive heat absorption, resulting in a significant drop in molten iron temperature (5-8℃), thus affecting subsequent processes. Although some mechanical feeding devices have been attempted in the existing technology, there are still problems such as poor feeding accuracy, insufficient particle size control, and inability to adapt to the direct processing of bagged ferrosilicon. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system. This invention includes a storage tank and a belt scale installed below the storage tank. A bag opener and a vibrating screen are fixedly installed sequentially from top to bottom on the inner wall of the storage tank. The vibrating screen includes a screen cylinder, the outer wall of which is connected to the inner wall of the storage tank via an elastic connector. A vibration motor is installed on the outer wall of the screen cylinder. Support frames are provided around the storage tank and the belt scale. This invention enables continuous operation of ferrosilicon feeding from bagged packaging to precise feeding, reducing manual intervention processes such as bag opening and handling, thereby significantly improving efficiency. The conveyor belt and weighing system ensure uniform and controllable feeding of ferrosilicon to the molten iron flow; the vibrating screen ensures that the ferrosilicon particle size meets the requirements for high-efficiency silicon enhancement, thereby increasing the reaction specific surface area and silicon enhancement efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system includes a storage tank with an open top and a belt scale installed below the storage tank. The belt scale includes a conveyor belt and a weighing device installed on the conveyor belt. The inner cavity of the storage tank includes an upper feeding zone and a lower screening zone that are connected. The feeding zone is conical with a diameter that tapers from top to bottom, and the screening zone is cylindrical with a diameter equal to the minimum diameter of the feeding zone. A bag opener is fixedly installed on the inner wall of the feeding zone, and the axis of the bag opener is on the same straight line as the axis of the feeding zone. A vibrating screen is installed on the inner wall of the screening zone. The vibrating screen includes a screen cylinder and a screen mesh device fixedly installed inside the screen cylinder. The outer wall of the screen cylinder is connected to the inner wall of the screening zone through an elastic connector. A vibration motor is installed on the outer wall of the screen cylinder. A support frame is provided around the storage tank and the belt scale.

[0006] Furthermore, the elastic connector includes several springs, which are distributed around the outer periphery of the screen cylinder. Each of the springs has a mounting ring welded to both ends, and both ends of the springs are respectively fixed to the outer wall of the screen cylinder and the inner wall of the storage tank by different mounting rings.

[0007] Furthermore, the screen device includes a coarse screen and a fine screen installed sequentially from top to bottom inside the screen cylinder. Several crushing rods are installed on the top surface of the coarse screen, and the crushing rods are distributed in a matrix. The top of each crushing rod is a sharp point.

[0008] Furthermore, the coarse screen and the fine screen are spaced 50-70cm apart vertically, the adjacent crushing rods are spaced 2-3cm apart, and the crushing rods are 5-7cm long.

[0009] Furthermore, a discharge chute is connected below the conveyor belt, and a discharge pipe is provided at the end of the discharge chute. The discharge pipe includes a corrugated pipe and a rigid pipe. One end of the corrugated pipe is connected to the outlet end of the discharge chute, and the other end of the corrugated pipe is connected to the rigid pipe. A V-shaped guide plate is installed at the end of the rigid pipe away from the corrugated pipe.

[0010] Furthermore, a reserved opening corresponding to the position of the vibration motor is provided on the storage tank.

[0011] Furthermore, the bag opener includes an arc-shaped cone, which is vortex-shaped. The vortex taper of the arc-shaped cone matches the shape of the filling area. The axis of the arc-shaped cone is on the same straight line as the axis of the storage tank. Several supporting steel bars are fixedly installed on the outer wall of the arc-shaped cone, and the several supporting steel bars are fixedly connected to the inner wall of the filling area.

[0012] Furthermore, the arc-shaped cone is located above the inlet of the vibrating screen, and the spacing between adjacent supporting steel bars is 7-12 cm.

[0013] Furthermore, the device also includes an upper elastic cloth hopper and a lower elastic cloth hopper. One end of the upper elastic cloth hopper is fixedly connected to the inner wall of the injection area, and the other end is fixedly connected to the top of the screen cylinder. One end of the lower elastic cloth hopper is fixedly connected to the screen cylinder, and the other end is fixedly connected to the bottom of the screening area. Both the upper and lower elastic cloth hoppers are spaced apart from the inner wall of the storage tank.

[0014] Furthermore, both the upper elastic hopper and the lower elastic hopper include several spring steel wire ropes distributed in a circle, and several pieces of elastic cloth connecting two adjacent spring steel wire ropes.

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

[0016] This invention utilizes a storage tank and a belt scale installed below the storage tank. A bag opener and a vibrating screen are fixedly installed on the inner wall of the storage tank from top to bottom. The vibrating screen includes a screen cylinder, the outer wall of which is connected to the inner wall of the storage tank via an elastic connector. A vibration motor is installed on the outer wall of the screen cylinder. This enables continuous operation of ferrosilicon from bagged dispensing to precise dispensing, reducing manual intervention processes such as bag opening and handling, thus significantly improving efficiency. The conveyor belt and weighing system ensure uniform and controllable delivery of ferrosilicon to the molten iron flow. The vibrating screen ensures that the ferrosilicon particle size meets the requirements for high-efficiency silicon enhancement, thereby increasing the reaction specific surface area and silicon enhancement efficiency. Attached Figure Description

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

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the belt scale of this utility model;

[0020] Figure 4 This is a three-dimensional structural view of the storage tank of this utility model;

[0021] Figure 5 This is a partial cross-sectional view of the present invention;

[0022] Figure 6 This is a three-dimensional structural view of the bag opener of this utility model;

[0023] Figure 7 This is a three-dimensional structural view of the vibrating screen of this utility model;

[0024] Figure 8 This is a partial enlarged view of the vibrating screen of this utility model;

[0025] Figure 9This is a schematic diagram of the upper elastic cloth bucket of this utility model.

[0026] In the diagram: 1. Storage tank; 2. Bag opener; 21. Arc-shaped cone; 22. Supporting steel bar; 3. Vibrating screen; 31. Screen cylinder; 32. Spring component; 33. Vibrating motor; 34. Screen device; 341. Coarse screen; 342. Fine screen; 343. Crushing rod; 35. Mounting ring; 41. Upper elastic cloth hopper; 411. Elastic cloth; 412. Spring steel wire rope; 42. Lower elastic cloth hopper; 5. Belt scale; 51. Protective cover; 6. Support frame. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example 1:

[0030] Please see Figure 1-8 A ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system includes a storage tank 1 with an open top and a belt scale 5 installed below the storage tank 1. The belt scale 5 includes a conveyor belt and a weighing device installed on the conveyor belt. The inner cavity of the storage tank 1 includes an upper feeding zone and a lower screening zone that are connected. The feeding zone is conical with a diameter that narrows from top to bottom, and the screening zone is cylindrical with a diameter equal to the minimum diameter of the feeding zone. A bag opener 2 is fixedly installed on the inner wall of the feeding zone, and the axis of the bag opener 2 is on the same straight line as the axis of the feeding zone. A vibrating screen 3 is fixedly installed on the inner wall of the screening zone. The vibrating screen 3 includes a screen cylinder 31 and a screen device 34 fixedly installed inside the screen cylinder 31. The outer wall of the screen cylinder 31 is connected to the inner wall of the screening zone through an elastic connector. A vibration motor 33 is installed on the outer wall of the screen cylinder 31. A support frame 6 is provided around the storage tank 1 and the belt scale 5.

[0031] The device provided by this utility model has a continuous automated process: bagged ferrosilicon is put into the storage tank 1 through the opening at the top. Since the upper injection area is a cone shape that shrinks from top to bottom, the falling bag will be naturally guided and concentrated in the central area. The bag opener 2, which is fixedly installed on the inner wall of the injection area, accurately punctures the falling bag, thereby releasing the ferrosilicon material.

[0032] Then the ferrosilicon material falls into the screening area located at the bottom of the storage tank 1. Since the vibrating screen 3 is fixedly installed on the inner wall of the screening area, the screen device 34 of the vibrating screen 3 will screen the falling ferrosilicon to ensure that only particles that meet the particle size requirements can pass through. The elastic connector provides the necessary space for the screen cylinder 31 to vibrate while limiting the vibration range of the screen cylinder 31.

[0033] The qualified ferrosilicon particles screened fall onto a belt scale 5 located below the storage tank 1. The weighing device of the belt scale 5 detects the weight of the ferrosilicon on the conveyor belt in real time, and achieves precise and continuous control of the amount of ferrosilicon fed in by controlling the running speed of the conveyor belt. The belt scale 5 is existing technology and will not be described in detail here.

[0034] The device provided by this utility model, through the structural design of the conical filling zone, naturally guides and concentrates the falling material bag, ensuring its precise alignment with the centrally located bag opener 2. This guarantees the inevitability and reliability of the bag-breaking action, laying the foundation for subsequent automated processes. The storage tank 1 adopts an integrated design of the conical filling zone and the straight cylindrical screening zone, resulting in a compact and reasonable structure. The screen cylinder 31 is fixed to the inner wall of the storage tank 1 via elastic connectors, fulfilling the screening function while reducing the vibration impact on the overall structure through vibration isolation design, thus contributing to improved equipment stability and lifespan. This utility model uses a support frame 6 to stably mount the device and to resist the high-temperature radiation and potential vibrations of the molten iron treatment zone, preventing device displacement or deformation and ensuring long-term operational stability.

[0035] This utility model, in conjunction with a belt scale 5, enables real-time monitoring and precise control of the amount of ferrosilicon fed, thereby setting and maintaining a stable feeding rate according to process requirements, effectively stabilizing the silicon content of molten iron, avoiding resource waste, and realizing automated continuous operation from whole bag feeding to precise feeding. It eliminates manual bag opening and handling, significantly improving work efficiency.

[0036] The elastic connector includes several springs 32, which are distributed around the outer periphery of the screen cylinder 31. Each end of the springs 32 is welded with a mounting ring 35, and the ends of the springs 32 are respectively fixed to the outer wall of the screen cylinder 31 and the inner wall of the storage tank 1 by different mounting rings 35.

[0037] Several springs 32 are arranged in a ring around the outer periphery of the screen cylinder 31, forming a flexible suspension system. When the vibration motor 33 generates excitation force, the springs 32 allow the screen cylinder 31 to generate small-amplitude high-frequency vibrations in the radial and axial directions, preventing the screen cylinder 31 from being constrained by the rigid inner wall of the storage tank 1, thereby enabling the vibrating screen 3 to perform the screening function. By suspending the screen cylinder 31 inside the storage tank 1 using the springs 32, sufficient amplitude space is provided for the vibration of the screen cylinder 31, while effectively absorbing and isolating vibration energy, significantly reducing the resonance effect on the main structure of the storage tank 1 and equipment fatigue.

[0038] The screen device 34 includes a coarse screen 341 and a fine screen 342 installed sequentially from top to bottom inside the screen cylinder 31. The coarse screen 341 and the fine screen 342 are spaced 50-70cm apart vertically. Several crushing rods 343 are installed on the top surface of the coarse screen 341. The crushing rods 343 are distributed in a matrix. The interval between adjacent crushing rods 343 is 2-3cm. The length of the crushing rods 343 is 5-7cm. The top of the crushing rods 343 is a pointed tip.

[0039] The ferrosilicon material falling from above first reaches the coarse screen 341. Under the high-frequency vibration of the vibrating motor 33, the material jumps and moves on the surface of the coarse screen 341. The crushing rod 343 impacts the agglomerated ferrosilicon. By utilizing the vibration force and the concentrated stress of the crushing rod 343, large or agglomerated ferrosilicon pieces are crushed into smaller particles.

[0040] After crushing, particles smaller than the mesh size of the coarse screen 341 pass through, while oversized lumps are intercepted on the coarse screen 341 and continue to be crushed. The material passing through the coarse screen 341 falls and diffuses within a 50-70 cm interval space and reaches the fine screen 342. The fine screen 342, with its even smaller mesh size, is responsible for fine screening, ensuring that only small particles meeting the process requirements pass through.

[0041] The crushing rod 343 can actively pierce and break up agglomerated ferrosilicon clumps. Combined with the high-frequency vibration of the vibrating motor 33, it can more effectively refine the material and prevent clogging of the coarse screen 341.

[0042] The conveyor belt of belt scale 5 is connected to a chute. A discharge pipe is installed at the end of the chute. The discharge pipe includes a corrugated pipe and a rigid pipe. One end of the corrugated pipe is connected to the outlet end of the chute, and the other end of the corrugated pipe is connected to the rigid pipe. A V-shaped guide plate is installed at the end of the rigid pipe away from the corrugated pipe.

[0043] The precisely metered ferrosilicon conveyed from belt scale 5 first falls into the feeding chute. The feeding chute guides the material to concentrate with its inclined sidewalls and accelerates its slide to the outlet at the end of the feeding chute. The outlet end of the feeding chute is connected to a corrugated pipe. Due to the flexibility and extensibility of the corrugated pipe itself, the operator can flexibly adjust the spatial position, height and angle of the outlet end of the feeding pipe by manually bending or stretching the corrugated pipe.

[0044] After the corrugated pipe adjusts the direction, the material flows out along a stable trajectory through a rigid pipe. At the very end of the rigid pipe, a V-shaped guide plate is installed, which comes into contact with the falling ferrosilicon flow. After the ferrosilicon flow impacts the inclined surface of the V-shaped guide plate, it forms a dispersed, flat curtain of material.

[0045] Furthermore, a protective cover 51 is installed on the belt scale 5, which covers the top of the conveyor belt to prevent dust from spreading.

[0046] A reserved opening is provided on the storage tank 1 corresponding to the position of the vibration motor 33, so that workers can quickly inspect, maintain or replace the vibration motor without disassembling the storage tank, thereby minimizing equipment downtime and ensuring production continuity.

[0047] The bag opener 2 includes an arc-shaped cone 21, which is vortex-shaped. The vortex taper of the arc-shaped cone 21 matches the shape of the filling area. The axis of the arc-shaped cone 21 is on the same straight line as the axis of the storage tank 1. Several supporting steel bars 22 are fixedly installed on the outer wall of the arc-shaped cone 21, and the several supporting steel bars 22 are fixedly connected to the inner wall of the filling area.

[0048] The arc-shaped cone 21 is located above the inlet of the vibrating screen 3, and the spacing between adjacent supporting steel bars 22 is 7-12 cm.

[0049] After the bagged ferrosilicon is fed into the filling area of ​​storage tank 1, it falls naturally. When the bottom of the bag hits the vortex-shaped arc-shaped cone 21, it is punctured for the first time. As the bag continues to fall or sinks due to its own weight, the vortex-shaped cone structure can use its continuous and sharp curved surface to spirally tear open a huge and regular rift, so that the ferrosilicon material can be quickly and completely discharged from the bag.

[0050] Several supporting steel bars 22 fixed to the outer wall of the arc-shaped cone 21 form a grid with a spacing of 7-12 cm. This spacing is sufficient to allow ferrosilicon particles to pass through smoothly while effectively intercepting and supporting the torn empty bags or large pieces of packaging bags. The supported empty bags can be removed by mechanical grippers or with manual assistance, thus separating them from the material flow.

[0051] It should be noted that the curved cone blade 21 has an edge facing the axis, which is used to puncture and tear the material bag.

[0052] The bag opener 2 provided by this utility model is accurate and reliable in breaking bags. By aligning the arc-shaped cone 21 with the axis of the filling area and matching the taper of the arc-shaped cone 21 with the shape of the filling area, the bag breaking is guaranteed to be smooth and avoids the bag from tilting, getting stuck or hitting the tank wall.

[0053] This invention utilizes a vortex-shaped arc-shaped cone blade 21 structure to achieve a smooth transition from puncture to tearing, resulting in rapid and thorough bag breaking. Compared to existing technologies employing multiple blade structures, this significantly improves bag breaking efficiency and reliability. The 7-12 cm spacing between adjacent supporting steel bars 22 reliably holds the empty bag while providing unobstructed passage for the ferrosilicon particles, preventing material blockage or accumulation on the bag opener 2. This achieves separation of material and packaging, allowing for rapid empty bag cleaning without affecting the continuous feeding of subsequent materials, thus ensuring the continuity of the automated process.

[0054] This invention enables continuous operation of ferrosilicon from bagged dispensing to precise delivery, reducing manual intervention processes such as bag opening and handling, significantly improving operational efficiency and safety, and adapting to fast-paced production. The combination of a conveyor belt and a weighing device ensures that the ferrosilicon is uniformly and controllably conveyed to the molten iron stream at a precisely set rate.

[0055] This invention employs a dual-stage screening design with a coarse screen 341 and a fine screen 342 installed sequentially from top to bottom (the coarse screen 341 intercepts large pieces, while the fine screen 342 ensures particle size), significantly improving the reaction surface area and melting efficiency of ferrosilicon. The vibrating motor 33 and the crushing rod 343 work together to effectively break up agglomerated ferrosilicon, ensuring continuous screening and high material qualification rate.

[0056] This invention effectively seals the vibration area through the upper elastic cloth hopper 41 and the lower elastic cloth hopper 42, preventing silicon dust from spilling out and polluting the environment and causing material loss; the elastic connector significantly reduces equipment resonance; the reserved opening design on the storage tank 1 facilitates the maintenance of the vibration motor 33, improving the overall reliability and maintainability of the equipment.

[0057] This invention utilizes a combination of corrugated pipes, rigid pipes, and V-shaped guide plates to achieve precise and dispersed addition of ferrosilicon to the surface of molten iron, thereby optimizing the silicon enhancement effect.

[0058] Example 2:

[0059] Please see Figure 1-9 A ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system includes an upper elastic hopper 41 and a lower elastic hopper 42. One end of the upper elastic hopper 41 is fixedly connected to the inner wall of the feeding zone, and the other end is fixedly connected to the top of the screen cylinder 31. One end of the lower elastic hopper 42 is fixedly connected to the screen cylinder 31, and the other end is fixedly connected to the bottom of the screening zone. Both the upper elastic hopper 41 and the lower elastic hopper 42 are spaced apart from the inner wall of the storage tank 1.

[0060] Both the upper elastic hopper 41 and the lower elastic hopper 42 include several spring steel wire ropes 412 distributed in a circular pattern, and several pieces of elastic fabric 411 connecting two adjacent spring steel wire ropes 412. For example... Figure 9 As shown, several spring steel wire ropes 412 distributed in a circle form the basic framework of the upper elastic cloth bucket 41 and the lower elastic cloth bucket 42. Due to the inherent strength and elasticity of the spring steel wire ropes 412, they support the conical structure of the upper elastic cloth bucket 41 and the lower elastic cloth bucket 42, preventing the elastic cloth 411 from being crushed or collapsed by the material.

[0061] The elastic cloth 411 connected between adjacent spring steel wire ropes 412 forms a sealing body. When the vibrating screen 3 is working, the displacement and vibration generated by the screen cylinder 31 pull the upper elastic cloth bucket 41 and the lower elastic cloth bucket 42. At this time, the spring steel wire rope 412 adapts to this displacement through its own stretching and compression. At the same time, the elastic cloth deforms with the deformation of the spring steel wire rope 412 skeleton and always maintains the continuity of the seal without tearing.

[0062] It should be noted that several spring steel wire ropes 412 constitute a load-bearing suspension structure. These circularly distributed spring steel wire ropes 412 bear and pull the weight of the vibrating screen 3, as well as the impact and pressure of the ferrosilicon material inside the screen cylinder 31, preventing the vibrating screen 3 from falling or shifting under continuous material pressure, thus ensuring that the vibrating screen 3 remains stably positioned at the predetermined working position. The upper elastic cloth hopper 41 and the lower elastic cloth hopper 42 serve as flexible sealing components connecting the vibrating screen 3 and the storage tank 1, establishing a flexible sealing channel. One end of the upper elastic cloth hopper 41 is fixed to the static inner wall of the feeding area, and the other end is fixed to the dynamic top of the screen cylinder 31, forming a continuous flexible channel between the feeding area and the inlet of the vibrating screen 3. One end of the lower elastic cloth hopper 42 is fixed to the dynamic bottom of the screen cylinder 31, and the other end is fixed to the static bottom of the screening area, forming another flexible channel between the outlet of the vibrating screen 3 and the outlet of the storage tank 1.

[0063] When the vibration motor 33 is working, the screen cylinder 31 vibrates at high frequency. The upper elastic cloth bucket 41 and the lower elastic cloth bucket 42 freely extend, contract, twist and deform with the vibration of the screen cylinder 31, without tearing or restricting its movement, so that the vibrating screen cylinder 31 and the stationary storage tank 1 are always connected and do not interfere with each other.

[0064] The upper elastic hopper 41 and the lower elastic hopper 42 work together to construct a complete and sealed material transfer path inside the storage tank 1, from the top opening of the storage tank 1, through the upper elastic hopper 41, the vibrating screen 3, the lower elastic hopper 42, to the discharge.

[0065] The upper elastic cloth hopper 41 and the lower elastic cloth hopper 42, while preventing impurities from the external environment from falling into the equipment, also prevent large pieces of material or fragments bouncing inside the vibrating screen 3 from accidentally getting stuck in the gap between the screen cylinder 31 and the storage tank 1, thus avoiding equipment jamming or damage. A gap is provided between the upper elastic cloth hopper 41 and the lower elastic cloth hopper 42 and the inner wall of the storage tank 1, forming an annular space, thereby preventing the upper elastic cloth hopper 41 and the lower elastic cloth hopper 42 from rubbing against the inner wall of the storage tank 1 during vibration and causing wear.

[0066] The sealed channel formed by the upper elastic cloth hopper 41 and the lower elastic cloth hopper 42 completely seals the ferrosilicon dust generated in the working area of ​​the storage tank 1 within the path, effectively preventing the dust from escaping from the gap between the screen cylinder 31 and the storage tank 1, ensuring a clean working environment, reducing material loss, and lowering the risk of dust explosion and employee health.

Claims

1. A ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system, characterized in that: The system includes a storage tank with an open top and a belt scale installed below the storage tank. The belt scale includes a conveyor belt and a weighing device mounted on the conveyor belt. The inner cavity of the storage tank includes a connected upper filling area and a lower sieving area. The filling area is conical with a diameter that tapers from top to bottom, and the sieving area is cylindrical with a diameter equal to the minimum diameter of the filling area. A bag opener is fixedly installed on the inner wall of the filling area, and the axis of the bag opener is on the same straight line as the axis of the filling area. A vibrating screen is installed on the inner wall of the sieving area. The vibrating screen includes a screen cylinder and a screen device fixedly installed inside the screen cylinder. The outer wall of the screen cylinder is connected to the inner wall of the sieving area through an elastic connector. A vibrating motor is installed on the outer wall of the screen cylinder. A support frame is provided around the storage tank and the belt scale.

2. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The elastic connector includes several springs, which are distributed around the outer periphery of the screen cylinder. Each of the springs has a mounting ring welded to both ends, and both ends of the springs are respectively fixed to the outer wall of the screen cylinder and the inner wall of the storage tank by different mounting rings.

3. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The screen device includes a coarse screen and a fine screen installed sequentially from top to bottom inside the screen cylinder. Several crushing rods are installed on the top surface of the coarse screen, and the crushing rods are distributed in a matrix. The top of each crushing rod is a sharp point.

4. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 3, characterized in that: The coarse and fine screens are spaced 50-70cm apart vertically, the adjacent crushing rods are spaced 2-3cm apart, and the crushing rods are 5-7cm long.

5. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The conveyor belt is connected to a discharge chute below it. A discharge pipe is provided at the end of the discharge chute. The discharge pipe includes a corrugated pipe and a rigid pipe. One end of the corrugated pipe is connected to the outlet end of the discharge chute, and the other end of the corrugated pipe is connected to the rigid pipe. A V-shaped guide plate is installed at the end of the rigid pipe away from the corrugated pipe.

6. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The storage tank has a reserved opening corresponding to the position of the vibration motor.

7. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The bag opener includes an arc-shaped cone, which is vortex-shaped. The vortex taper of the arc-shaped cone matches the shape of the filling area. The axis of the arc-shaped cone is on the same straight line as the axis of the storage tank. Several supporting steel bars are fixedly installed on the outer wall of the arc-shaped cone, and the several supporting steel bars are fixedly connected to the inner wall of the filling area.

8. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 7, characterized in that: The arc-shaped cone is located above the inlet of the vibrating screen, and the spacing between adjacent supporting steel bars is 7-12 cm.

9. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 1, characterized in that: The device further includes an upper elastic cloth hopper and a lower elastic cloth hopper. One end of the upper elastic cloth hopper is fixedly connected to the inner wall of the feeding area, and the other end is fixedly connected to the top of the screen cylinder. One end of the lower elastic cloth hopper is fixedly connected to the screen cylinder, and the other end is fixedly connected to the bottom of the screening area. Both the upper and lower elastic cloth hoppers are spaced apart from the inner wall of the storage tank.

10. The ferrosilicon feeding device for a blast furnace molten iron in-flow silicon enhancement system according to claim 9, characterized in that: Both the upper elastic hopper and the lower elastic hopper include several spring steel wire ropes distributed in a circle, and several pieces of elastic cloth connecting two adjacent spring steel wire ropes.

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