Sintering flux feeding system in steel production

Abstract

The utility model discloses a sintering flux feeding system in steel production, which comprises a quick lime bin, a bidirectional electric plugboard is arranged below a bin outlet of the quick lime bin, and the bidirectional electric plugboard comprises two movable plugboards; the upper portion and the lower portion of each movable inserting plate are each fixedly provided with a blocking piece of a strip-shaped structure. A guide channel is arranged below the two-way electric inserting plate and is coaxial with the bin outlet; an outlet of the guide channel is communicated with a feeding hole of a star-shaped feeder; a dustproof cover is arranged below a discharge port of the star-shaped feeder and comprises a dustproof cylinder, a bag-type dust collector and a sealing cover which are sequentially and coaxially arranged from inside to outside; wherein the dustproof cylinder is of a steel cylinder structure with an opening in the lower portion, and the sealing cover is of a cuboid structure with an opening in the lower portion; the problems that discharging of a flux bin in an existing iron and steel enterprise sintering system is not smooth, and frequent manual intervention is needed are solved.

Description

[Technical Field]

[0001] This utility model belongs to the field of sintering production and equipment technology, specifically relating to a sintering flux supply system in steel production. [Background Technology]

[0002] In the ironmaking sintering process, quicklime, as one of the important sintering fluxes, is crucially dependent on the smooth discharge from the quicklime silo. If the discharge from the quicklime silo is not smooth, it will seriously affect production efficiency and quality. Quicklime is prone to clogging within the silo, mainly due to factors such as the material flow angle. Therefore, ensuring the smooth discharge of quicklime from the silo has become an urgent problem to be solved in ironmaking sintering production.

[0003] In ironmaking and sintering production, various raw material silos are typically used to store different materials. Quicklime silos are used to store quicklime, which plays a crucial role in the sintering process (as a flux). Typical feeding devices may not be designed with the characteristics of quicklime in mind, easily leading to feeding difficulties.

[0004] Traditional quicklime silos typically rely on gravity to allow quicklime to fall naturally from the top. However, quicklime is highly hygroscopic, and issues such as the angle of the material flow can easily cause blockages within the silo, affecting the discharge speed. The existing device structure and its relationships: Traditional quicklime silos mainly consist of a silo body and a discharge port. The silo body stores the quicklime, and the discharge port is located at the bottom of the silo, allowing the quicklime to flow out through gravity. However, in practical use, this structure, due to factors such as the relatively large angle of the material flow, easily leads to quicklime accumulation within the silo, clogging the discharge port.

[0005] In existing sintering production technologies, the flux bin outlets are all inverted trapezoidal structures with many sharp angles inside. This makes the material prone to clogging during discharge, significantly impacting production continuity and efficiency. Furthermore, the original bins use single-slide hydraulic slide valves, whose one-way opening mechanism lacks flexibility and reliability. This design can lead to uneven material flow, requiring frequent manual intervention, increasing labor costs and operational risks. [Utility Model Content]

[0006] The purpose of this invention is to provide a sintering flux supply system for steel production, in order to solve the problem of uneven material discharge from the flux bin in the existing sintering system of steel enterprises, which requires frequent manual intervention.

[0007] This utility model adopts the following technical solution: a sintering flux feeding system in steel production, including a quicklime silo with a conical cylindrical structure, the inner wall of the quicklime silo being a smoothly transitioned curved surface structure, a bidirectional electric insert plate being provided below the outlet of the quicklime silo, the bidirectional electric insert plate including two horizontally arranged movable insert plates, the two movable insert plates being symmetrically arranged about the central axis of the quicklime silo; a strip-shaped baffle is fixedly provided above and below each movable insert plate, the gap formed between the upper and lower baffles being 1-2 mm larger than the thickness of the movable insert plate;

[0008] A guide channel is provided below the bidirectional electric slide gate, and the guide channel is coaxial with the outlet; the outlet of the guide channel is connected to the inlet of a star feeder.

[0009] A dust cover is installed below the discharge port of the star feeder. The dust cover includes a dust cover cylinder, a bag filter and a sealing cover arranged coaxially from the inside to the outside. The dust cover cylinder is a steel cylinder structure with an open bottom, and the sealing cover is a rectangular structure with an open bottom.

[0010] The two movable baffles are used to move left and right in the horizontal direction to open or close the outlet of the quicklime silo; the gap between the upper and lower baffles is used for the movable baffles to pass through during the movement, and to scrape off the material above the movable baffles during the passage.

[0011] Furthermore, the guide channel has a circular structure at the bottom, specifically: its bottom is a square outlet, and each side of the square is inclined upward with a triangular sidewall. Adjacent triangular sidewalls are connected by an arc surface, forming a circular inlet at the top of the guide channel; wherein, the angle between each triangular sidewall and the horizontal is 75°.

[0012] Furthermore, an electric vibrator is installed on the outer wall of the guide channel.

[0013] Furthermore, it also includes a rectangular insert frame, with tracks provided on the inner walls around the insert frame, and two movable inserts are used to be embedded in the tracks to achieve horizontal reciprocating movement; each baffle is fixedly installed on the insert frame.

[0014] The beneficial effects of this utility model are as follows: the smooth curved surface inside the quicklime silo reduces the probability of material blockage and improves the continuity of production; the use of a two-way electric slide gate valve enhances the flexibility and reliability of the quicklime silo outlet valve, ensuring smooth material discharge. Compared with a one-way slide gate valve, the two-way design greatly improves the reliability of handling blockages, reduces production interruptions caused by blockages, ensures the stable operation of the quicklime silo, improves the stability and reliability of the entire sintering system, reduces equipment maintenance costs and manpower input, and provides a strong guarantee for the efficient production of steel enterprises. [Attached Image Description]

[0015] Figure 1 This is a schematic diagram of the structure of a sintering flux supply system in steel production according to the present invention;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure after removing the insert frame;

[0017] Figure 3 for Figure 2 AA section view;

[0018] Figure 4 for Figure 2 A schematic diagram showing the material being fed out when the middle baffle opens to both sides.

[0019] Figure 5 This is a schematic diagram showing the positional relationship between the insert frame, the movable insert plate, and the baffle in this utility model.

[0020] Among them, 1. quicklime silo, 2. movable insert plate, 3. baffle plate, 4. guide channel, 5. star feeder, 6. dustproof cylinder, 7. bag dust collector, 8. sealing cover, 9. electric vibrator, 10. insert plate frame.

Detailed Implementation Methods

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] This utility model provides a sintering flux feeding system for steel production, such as... Figure 1 As shown, the quicklime silo 1 includes a conical cylindrical structure, which is manufactured using continuous welding technology. Continuous welding ensures the integrity and airtightness of the silo structure. When storing and transporting quicklime and other materials, it is necessary to prevent material leakage to avoid environmental pollution and impact on production safety. Continuous welding ensures continuous and uniform welds, reducing gaps and holes, thereby effectively improving the silo's sealing performance and ensuring that quicklime and other materials are safely contained within the silo.

[0023] The inner wall of quicklime silo 1 features a smoothly transitioned curved surface structure, and the absence of sharp angles significantly reduces the probability of material blockage. This innovation fundamentally improves the material flow characteristics at the discharge port, enhancing production continuity. Precise adjustment of design parameters ensures smoother discharge, laying a solid foundation for subsequent production stages.

[0024] A two-way electric slide is installed below the outlet of quicklime silo 1, such as... Figure 2As shown, the bidirectional electric slide gate valve includes two horizontally arranged movable slide gates 2, symmetrically positioned about the central axis of the quicklime silo 1. Each movable slide gate 2 is connected to a motor, which drives its movement. This invention uses a bidirectional hydraulic slide gate valve instead of the original single-slide hydraulic slide gate valve. The bidirectional valve opening method enhances the valve's flexibility and reliability, ensuring a smoother material feeding process. The application of this new valve can better adapt to different production conditions, improving the stability and reliability of the entire sintering system.

[0025] The movable insert 2 is located next to the outlet and serves as the outlet door. For example... Figure 4 As shown, each movable slide gate 2 controls the outlet of half of the quicklime silo 1. A single movable slide gate 2 experiences less force and has lower sensitivity, making maintenance easier. The bidirectional electric slide gate design greatly increases its flexibility. When blockage occurs in the quicklime silo, it can operate from two directions, effectively addressing blockages in different locations and situations. Its flexible structure can change the flow direction and pressure distribution of the material. Through bidirectional adjustment, the equilibrium state at the blockage point can be broken, prompting the material to flow again. Compared to a unidirectional slide gate valve, the bidirectional design significantly improves the reliability of handling blockages, reduces production interruptions caused by blockages, and ensures the stable operation of the quicklime silo.

[0026] like Figure 2 and Figure 3 As shown, a strip-shaped baffle 3 is fixedly installed above and below each movable insert plate 2. The gap formed between the upper and lower baffles 3 is 1-2 mm larger than the thickness of the movable insert plate 2; this ensures both the smooth movement of the movable insert plate 2 and the sealing of the material.

[0027] A guide channel 4 is provided below the bidirectional electric slide gate, and the guide channel 4 is coaxial with the outlet.

[0028] The outlet of the guide channel 4 is connected to the inlet of the star feeder 5; the star feeder 5 is driven by a motor, and the impeller on the main shaft is rotated by a reducer. The material enters the impeller groove through the inlet, and the rotating impeller carries the material to the outlet and feeds it out evenly.

[0029] A dust cover is installed below the discharge port of the star feeder 5. The dust cover includes a dust cover cylinder 6, a bag filter 7, and a sealing cover 8 arranged coaxially from the inside to the outside. The dust cover cylinder 6 is a steel cylinder structure with an open bottom. The bag filter 7 is used to contain and reduce dust from quicklime. The sealing cover 8 is a rectangular structure with an open bottom. Below the sealing cover 8 is a skirt belt. The quicklime discharged by the star feeder 5 finally falls onto the skirt belt and is transported out.

[0030] Among them, the two movable baffles 2 are used to move left and right in the horizontal direction to open or close the outlet of the quicklime silo 1; the gap between the upper and lower baffles 3 is used for the movable baffles 2 to pass through during the movement, and to scrape off the material above the movable baffles 2 during the passage.

[0031] In some embodiments, the guide channel 4 has a circular upper and lower structure, specifically: its bottom is a square outlet, each side of the square is inclined upward with a triangular sidewall, and adjacent triangular sidewalls are connected by an arc surface, that is, a circular inlet is formed at the top of the guide channel 4; wherein, the angle between each triangular sidewall and the horizontal is 75°.

[0032] To ensure a smooth connection between the guide channel 4 and the upper quicklime silo 1, and the lower star feeder 5's square inlet, a circular upper structure with a square lower structure is adopted. The circular upper structure provides excellent mechanical properties, evenly distributing pressure from materials and external sources, reducing the risk of stress concentration, and improving the overall stability and compressive strength of the guide channel 4. The square lower structure facilitates connection and installation with foundations or other equipment, increasing the adaptability of the guide channel 4 in practical applications. Furthermore, the circular upper structure ensures good material flow within the silo, preventing material accumulation in corners, and also increases the structural strength of the bottom of the guide channel 4 to a certain extent. The arc-shaped design reduces stress concentration and avoids sharp corners, thereby reducing the risk of structural damage due to stress concentration. The overall structure is welded, which improves the silo's seismic performance to a certain extent, allowing it to better maintain structural integrity when subjected to vibration or impact, ensuring the safe and reliable operation of the quicklime silo.

[0033] When material flows within the guide channel 4, a suitable angle allows the material to slide smoothly, reducing the possibility of material residue and blockage, and improving production efficiency. Simultaneously, this angle also helps optimize the force distribution within the guide channel 4, enabling it to evenly transfer force to the supporting structure when bearing the weight of the material and external loads, thus extending the service life of the guide channel 4.

[0034] In some embodiments, an electric vibrator 9 is provided on the outer wall of the guide channel 4 to vibrate the material and prevent material accumulation.

[0035] By adjusting the star feeder gap and interlocking the feeder's feeding feedback value with the hopper's electric vibration, and adjusting the amplitude, this innovation achieves precise control of the feeding process, ensuring continuous and stable feeding and eliminating material spillage. Through real-time feedback and adjustment, the feeding process can be dynamically optimized based on actual production conditions, improving production efficiency and reducing equipment maintenance costs and manpower input.

[0036] In some embodiments, a rectangular insert frame 10 is also included, such as... Figure 5 As shown, tracks are provided on the inner walls around the insert frame 10, and two movable insert plates 2 are used to be embedded in the tracks to achieve horizontal reciprocating movement; each baffle 3 is fixedly installed on the insert frame 10.

[0037] The method of using the sintering flux feeding system in steel production according to this utility model is as follows: Material is introduced through the quicklime silo 1, the bidirectional electric sluice gate is opened to convey the material to the guide channel 4, and then discharged at a uniform speed by the star feeder 5 onto the skirt belt. A three-layer dust cover is installed below the outlet of the star feeder 5 to prevent material dust from being emitted. After unloading, the bidirectional electric sluice gate is closed.

Claims

1. A sintering flux feeding system for steel production, characterized in that, The device includes a quicklime silo (1) with a conical cylindrical structure. The inner wall of the quicklime silo (1) is a smoothly transitioned curved surface structure. A bidirectional electric insert plate is provided below the outlet of the quicklime silo (1). The bidirectional electric insert plate includes two horizontally arranged movable insert plates (2). The two movable insert plates (2) are symmetrically arranged about the central axis of the quicklime silo (1). A strip-shaped baffle (3) is fixedly provided above and below each movable insert plate (2). The gap formed between the upper and lower baffles (3) is 1-2 mm larger than the thickness of the movable insert plate (2). A guide channel (4) is provided below the bidirectional electric slide block, and the guide channel (4) is coaxial with the outlet; the outlet of the guide channel (4) is connected to the inlet of a star feeder (5); The star feeder (5) is provided with a dust cover below the discharge port. The dust cover includes a dust cover cylinder (6), a bag filter (7) and a sealing cover (8) arranged coaxially from the inside to the outside. The dust cover cylinder (6) is a steel cylinder structure with an open bottom, and the sealing cover (8) is a cuboid structure with an open bottom. Among them, the two movable inserts (2) are used to move left and right in the horizontal direction to open or close the outlet of the quicklime silo (1); the gap between the upper and lower baffles (3) is used for the movable inserts (2) to pass through during the movement, and to scrape off the material above the movable inserts (2) during the passage.

2. The sintering flux feeding system in steel production as described in claim 1, characterized in that, The guide channel (4) has a circular upper and lower structure. Specifically, its bottom is a square outlet, and each side of the square is inclined upward with a triangular sidewall. Adjacent triangular sidewalls are connected by an arc surface, forming a circular inlet at the top of the guide channel (4). The angle between each triangular sidewall and the horizontal is 75°.

3. A sintering flux feeding system in steel production as described in claim 1 or 2, characterized in that, An electric vibrator (9) is provided on the outer wall of the guide channel (4).

4. A sintering flux feeding system in steel production as described in claim 1 or 2, characterized in that, It also includes a rectangular insert frame (10), with tracks provided on the inner walls around the insert frame (10), and two movable inserts (2) are used to be embedded in the tracks to achieve horizontal reciprocating movement; each baffle (3) is fixedly installed on the insert frame (10).

Images