A separating device for dephosphorization slag of a smart steelmaking converter

Abstract

The utility model discloses a kind of separating devices for dephosphorization slag of intelligent steelmaking converter, including equipment main body, feed inlet, sliding groove, filter collection box, conversion furnace, placing collection box, discharge port, bearing plate, smoke exhaust device, stirring device and mobile device;Feed inlet is located equipment main body top end;Discharge port is located equipment main body front side lower end;Conversion furnace, sliding groove and placing collection box are installed in equipment main body from top to bottom;Filter collection box is connected with sliding groove;Two smoke exhaust devices are equipped, and are installed in conversion furnace front side and sliding groove rear side;Stirring device is located inside conversion furnace;Conversion furnace is equipped with heater;Equipment main body is connected with mobile device by bearing plate;The filter collection box of the utility model can separate molten steel after dephosphorization and slag, ensure molten steel purity, and it can quickly separate equipment body through sliding groove to clean slag, convenient and fast, reduce equipment downtime, through stirring device can make molten steel and dephosphorization powder fully mixed to dephosphorize.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting technology, specifically to an intelligent separation device for dephosphorizing slag in steelmaking converters. Background Technology

[0002] In the steel converter smelting process, phosphorus, as a ubiquitous harmful element, has a decisive impact on various performance indicators of steel. The lower the phosphorus content, the better the steel's toughness, cold brittle transition temperature, weldability, and other key performance characteristics. Therefore, to ensure steel quality, the phosphorus content in molten steel must be strictly controlled (typically ≤0.015%) through a deep dephosphorization process during converter smelting. Traditional dephosphorization technology relies on adding lime-based composite powder supplemented by pneumatic stirring. However, existing equipment typically uses unidirectional air blowing, which easily creates dead zones in the molten steel vortex, resulting in insufficient contact between the powder and the molten steel and reduced dephosphorization efficiency.

[0003] Patent CN202322099379.3 discloses a device for deep dephosphorization in a converter. Based on existing technology, the device includes a first compressed air source connected to the converter via two branch pipes; a heating jacket is installed outside the charging hopper; and an extraction hood is installed at the top of the converter opening. The extraction hood uses a fan and pipes to deliver hot air into the heating jacket to dry the material in the charging hopper. This device utilizes the counter-clockwise vortex of molten steel at the upper blowing pipe and the clockwise vortex at the lower blowing pipe, thus avoiding the conventional single clockwise vortex mixing direction, which cannot effectively mix with the dephosphorizing powder. Furthermore, the hot exhaust gas from the converter heats and dries the dephosphorizing powder, allowing the composite dephosphorizing powder to effectively enter the spray gun. While this device allows for sufficient contact between the powder and molten steel, increasing dephosphorization efficiency, it generates residue during the dephosphorization process. The lack of a structure for collecting and cleaning this residue leads to frequent equipment shutdowns for cleaning, reducing overall production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent steelmaking converter dephosphorization slag separation device that can efficiently separate steel slag, conveniently clean residues, reduce downtime maintenance, improve workshop flexibility, and ensure environmentally friendly emissions. This device aims to solve the technical problem that existing technologies lack effective collection and rapid cleaning structures for residues generated during the dephosphorization process, leading to frequent equipment downtime maintenance and reduced production efficiency.

[0005] To solve the above technical problems, the solution adopted by this utility model is as follows: A smart separation device for dephosphorizing slag in a steelmaking converter includes a main body, a feed inlet, a sliding trough, a filter collection box, a converter, a collection box placement box, a discharge outlet, a load-bearing plate, a flue gas exhaust device, a stirring device, and a moving device. The feed inlet is located at the top of the main body; the discharge outlet is located at the lower front end of the main body; the converter, sliding trough, and collection box are sequentially installed from top to bottom on the upper part of the main body; the filter collection box is slidably connected to the sliding trough; two flue gas exhaust devices are provided, one installed at the front of the converter and the other at the rear of the sliding trough; the stirring device is located inside the converter; heaters are provided on the front and rear sides of the converter; the top of the load-bearing plate is fixedly connected to the bottom of the main body, and the bottom is connected to the moving device. The bottom of the converter is equipped with a valve and a guide cone; the valve on the guide cone is a zirconium ceramic gate, and its opening is controlled by a hydraulic cylinder.

[0006] Molten steel and dephosphorizing powder are added to the converter. The heater maintains the temperature inside the converter within the range of 1600-1650℃. Stirring is performed by an agitator to ensure full contact between the dephosphorizing powder and the molten steel, allowing the powder to react with phosphorus to form stable calcium phosphate. After dephosphorization, the valve at the bottom of the converter is opened, opening the discharge port. The treated slag flows downwards from the guide cone into the filter collection box for filtration. The molten slag is filtered out and remains in the filter collection box. The pure molten steel continues to flow downwards into the collection box and is discharged from the outlet into the ladle. The filter collection box effectively filters solid slag from the molten steel, ensuring its purity and avoiding downtime for maintenance and cleaning. After filtration, the filtered residue in the collection box cools down, or when the collection box is nearly full, it can be pulled out from the sliding trough for replacement and cleaning, reducing downtime for cleaning. The load-bearing plate and moving device allow the equipment to be moved to different locations within the steelmaking workshop. The flue gas generated during operation is treated by the exhaust system before being discharged from the equipment, making it highly practical overall.

[0007] Furthermore, the stirring device includes a drive motor and stirring blades; the drive motor is fixedly installed at the top center of the main body of the equipment, and its output end extends into the conversion furnace; the stirring blades are located inside the conversion furnace and are fixedly connected to the output end of the drive motor.

[0008] After adding molten steel and dephosphorizing powder to the converter, the drive motor is turned on. The drive motor drives the stirring fan blades to rotate, stirring the liquid slag and making it fully mixed with the dephosphorizing powder for dephosphorization. After rotating one end of the mixed molten steel for a period of time, the drive motor is stopped, and the valve at the bottom is opened, allowing the molten steel to slowly flow from the guide cone into the filter collection box for filtration and then into the collection box.

[0009] Furthermore, the two exhaust devices are a first exhaust pipe and a second exhaust pipe, respectively; both the first and second exhaust pipes are equipped with filters; the first exhaust pipe is installed on the front side of the converter; the second exhaust pipe is installed on the rear side of the sliding trough. The first exhaust pipe is connected to the converter, and the flue gas generated during the stirring process is discharged through the first exhaust pipe. The flue gas generated when the dephosphorized molten steel flows downward into the collection box is discharged through the second exhaust pipe. The filters in the first and second exhaust pipes can filter and clean the flue gas before discharge, reducing environmental pollution.

[0010] Furthermore, the filter collection box is equipped with a handle groove and a filter slag screen; the handle groove is located on the front side of the filter collection box; the filter slag screen is fixedly installed inside the lower end of the filter collection box. When the molten steel after dephosphorization flows into the filter collection box, the liquid molten steel passes through the mesh of the filter slag screen and continues to flow downwards into the collection box, while the solid slag is trapped on the screen surface. The filter slag screen filters the molten steel, preventing the slag from entering the ladle or subsequent refining process with the molten steel. The handle groove allows for convenient and quick removal of the filter collection box from the main body of the equipment for cleaning residue.

[0011] Furthermore, the main body of the equipment is equipped with a servo motor and a discharge auger; the servo motor is fixedly installed at the lower rear end of the main body of the equipment, and its output end extends through the main body into the placement and collection box; the discharge auger is located inside the placement and collection box and is fixedly connected to the output end of the servo motor. The filtered clean molten steel is temporarily stored at the bottom of the placement and collection box. The servo motor drives the discharge auger to rotate. When the auger rotates, its spiral blades push the molten steel collected at the bottom of the box along the axial direction of the auger. The flow rate of the molten steel can be adjusted by the rotation speed of the discharge auger, so that the molten steel is discharged stably and continuously, completing the dephosphorization and impurity removal of the molten steel.

[0012] Furthermore, the discharge port is equipped with a matching movable cover; the discharge port is also equipped with a matching movable baffle. The movable cover can isolate the molten steel from external contamination, and the movable baffle is slidably connected to the discharge port. The opening size of the movable baffle is controlled by the rotation of the discharge auger, thereby adjusting the flow rate of the molten steel.

[0013] Furthermore, an inspection door is provided on the right side of the converter; the inspection door is equipped with a matching door handle. When maintenance of the converter's interior is required, the operator can open the inspection door using the door handle to facilitate inspection and maintenance of the converter's interior. The inspection door is located above one side of the converter, at a height higher than the molten steel inside the converter. When necessary, the inspection door can be opened to observe the molten steel, ensuring the normal operation of the descaling process.

[0014] Furthermore, the moving device is a brakeable omnidirectional wheel. The omnidirectional wheel design allows the device to be manually pushed to a suitable location for use, and the brakeable design allows the internal brake pads to lock the wheels when the wheel-side brake pedal is pressed, preventing the device from sliding.

[0015] The working principle of this utility model is as follows: After adding molten steel and dephosphorizing powder to the converter, the drive motor is turned on, which drives the stirring fan blades to rotate, stirring the molten steel to ensure thorough mixing with the dephosphorizing powder. After rotating one end of the mixing molten steel for a period of time, the drive motor is stopped, and the valve at the bottom is opened, allowing the dephosphorized molten steel to slowly flow from the guide cone into the filter collection box. The liquid molten steel continues to flow downwards through the mesh of the filter slag screen into the placement collection box, while the solid slag is trapped on the screen surface. The molten steel is filtered through the filter slag screen, and the filtered clean molten steel is temporarily stored at the bottom of the placement collection box. A servo motor drives the discharge auger to rotate. As the auger rotates, its spiral blades propel the molten steel collected at the bottom of the box along the axial direction of the auger. The flow rate of the molten steel can be adjusted by changing the rotation speed of the discharge auger, ensuring stable molten steel flow. The waste gas is continuously discharged from the outlet. The first exhaust pipe is connected to the converter. The flue gas generated during the stirring process is discharged through the first exhaust pipe. The flue gas generated when the dephosphorized molten steel flows downward into the filter collection box is discharged through the second exhaust pipe. The flue gas is filtered and cleaned by the filters in the first and second exhaust pipes before being discharged. After dephosphorization is completed, the solid slag in the filter collection box is allowed to cool. The filter collection box can be easily and quickly removed from the main body of the equipment through the handle groove for cleaning the residue. When maintenance of the converter is required, the operator can open the maintenance door through the door handle for easy inspection and maintenance of the converter. The maintenance door is located on the upper side of the converter, higher than the height of the molten steel in the converter. When necessary, the maintenance door can be opened to observe the molten steel to ensure the normal operation of the dephosphorization operation.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model can separate dephosphorized molten steel from slag through a filter collection box, ensuring the purity of the molten steel. The filter collection box can be quickly separated from the equipment body through a sliding groove to clean the slag, avoiding frequent equipment downtime for maintenance, thereby improving production efficiency. The stirring device can fully mix the molten steel and dephosphorizing powder for dephosphorization. The overall operation is convenient and highly practical.

[0017] 2. This utility model, by setting a sliding connection between the filter collection box and the filter slag screen, can filter the solid slag produced during dephosphorization, ensuring the purity of the molten steel. The filter collection box can be quickly pulled out through the handle groove and sliding groove, realizing the rapid removal and cleaning of residues. Overall, it effectively reduces equipment downtime for maintenance. The movable device facilitates flexible relocation within the workshop. The smoke exhaust device has a built-in filter that can purify the flue gas, avoiding environmental pollution. Overall, it effectively improves the efficiency of dephosphorization operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a frontal cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the placement box structure of this utility model; Figure 4 This is a schematic diagram of the collection box structure of this utility model.

[0019] In the diagram: 1. Main body of the equipment; 2. Feed inlet; 3. Movable cover; 4. Drive motor; 5. Sliding groove; 6. Filter collection box; 7. Handle groove; 8. Filter screen; 9. Converter; 10. Heater; 11. Stirring blades; 12. First exhaust pipe; 13. Second exhaust pipe; 14. Filter; 15. Inspection door; 16. Door handle; 17. Placement collection box; 18. Servo motor; 19. Discharge auger; 20. Discharge port; 21. Movable baffle; 22. Load-bearing plate; 23. Casters. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] The following is a detailed description of the intelligent dephosphorization slag separation device for steelmaking converters according to the present invention, with reference to the accompanying drawings: Example

[0023] A smart steelmaking converter dephosphorization slag separation device includes a main body 1, a feed inlet 2, a sliding trough 5, a filter collection box 6, a converter 9, a placement collection box 17, a discharge outlet 20, a supporting plate 22, a flue gas exhaust device, a stirring device, and a moving device. The feed inlet 2 is located at the top of the main body 1. The discharge outlet 20 is located at the lower front end of the main body 1. The converter 9, the sliding trough 5, and the placement collection box 17 are installed sequentially from top to bottom on the upper end of the main body 1. The filter collection box 6 is slidably connected to the sliding trough 5. Two flue gas exhaust devices are provided, one installed at the front of the converter 9 and the other at the rear of the sliding trough 5. The stirring device is located inside the converter 9. Heaters 10 are provided on the front and rear sides of the converter 9. The top of the supporting plate 22 is fixedly connected to the bottom of the main body 1, and the bottom is connected to the moving device.

[0024] The working principle of this embodiment is as follows: Molten steel and dephosphorizing powder are added to the converter 9 through the feed inlet 2. The heater 10 maintains the temperature of the molten steel in the converter 9 within the range of 1600℃. The stirring device ensures that the dephosphorizing powder and molten steel are in full contact, allowing the dephosphorizing powder to react with the phosphorus in the molten steel to form stable calcium phosphate. After dephosphorization is completed, the bottom valve of the converter 9 is opened, opening the discharge port, allowing the treated slag to flow downward from the guide cone into the filter collection box 6 for filtration by gravity. The slag is filtered out and remains in the filter collection box 6. The pure molten steel continues to flow downward into the collection box 17 and is discharged from the discharge port into the ladle. After filtration is completed, the residue filtered out in the filter collection box 6 is allowed to cool. The filter collection box 6 is then pulled out from the sliding chute 5 for cleaning, making it convenient for the next use. The flue gas generated during operation is treated by the exhaust device and discharged from the equipment. The load-bearing plate 22 and the moving device can move this equipment to different locations in the steelmaking workshop for use. Example

[0025] The difference from Embodiment 1 is that the stirring device includes a drive motor 4 and stirring blades 11; the drive motor 4 is fixedly installed at the top center of the main body 1 of the equipment, and its output end extends into the converter 9; the stirring blades 11 are located inside the converter 9 and are fixedly connected to the output end of the drive motor 4; the two exhaust devices are a first exhaust pipe 12 and a second exhaust pipe 13; both the first exhaust pipe 12 and the second exhaust pipe 13 are equipped with filters 14; the first exhaust pipe 12 is installed on the front side of the converter 9; the second exhaust pipe 13 is installed on the rear side of the sliding groove 5; the filter collection box 6 is provided with a handle groove 7. The filter screen 8 is provided with a handle groove 7 on the front side of the filter collection box 6. The filter screen 8 is fixedly installed inside the lower end of the filter collection box 6. The main body of the equipment 1 is provided with a servo motor 18 and a discharge auger 19. The servo motor 18 is fixedly installed at the lower rear end of the main body of the equipment 1, and its output end extends through the main body of the equipment 1 into the placement collection box 17. The discharge auger 19 is located inside the placement collection box 17 and is fixedly connected to the output end of the servo motor 18. The discharge port 20 is provided with a matching movable cover 3. The discharge port 20 is provided with a matching movable baffle 21. The moving device is a brakeable universal wheel 23.

[0026] After adding molten steel and dephosphorizing powder to the converter 9, the drive motor 4 is turned on. The drive motor 4 drives the stirring fan blades 11 to rotate, stirring the molten steel to fully mix it with the dephosphorizing powder for dephosphorization. After rotating one end of the mixed molten steel for a period of time, the drive motor 4 is stopped, and the valve at the bottom is opened, allowing the molten steel after dephosphorization to slowly flow from the guide cone into the filter collection box 6. The liquid molten steel continues to flow downwards through the mesh of the filter slag screen 8 into the placement collection box 17, while the solid slag is trapped on the screen surface. The molten steel is filtered through the filter slag screen 8, and the filtered clean molten steel is temporarily stored at the bottom of the placement collection box 17. The servo motor 18 rotates, driving the discharge auger 19 to rotate. When the auger rotates, its spiral blades push the box... The molten steel collected at the bottom is pushed along the axial direction of the auger. The flow rate of the molten steel can be adjusted by the rotation speed of the discharge auger 19, so that the molten steel is discharged stably and continuously from the discharge port 20. The first exhaust pipe 12 is connected to the conversion furnace 9. The flue gas generated during the stirring process is discharged through the first exhaust pipe 12. The flue gas generated when the dephosphorized molten steel flows downward into the filter collection box 6 is discharged through the second exhaust pipe 13. The flue gas can be filtered and cleaned by the filter 14 in the first exhaust pipe 12 and the second exhaust pipe 13 before being discharged. After the dephosphorization is completed, wait for the solid slag in the filter collection box 6 to cool down. The filter collection box 6 can be easily and quickly removed from the main body of the equipment 1 through the handle groove 7 for cleaning the residue.

[0027] The working principle of this embodiment is the same as that of Embodiment 1. Example

[0028] The difference from Embodiment 2 is that the converter 9 is provided with an inspection door 15 on the right side; the inspection door 15 is provided with a matching door handle 16. When maintenance of the converter interior is required, the operator can open the inspection door 15 through the door handle 16 to facilitate inspection and maintenance of the converter 9 interior. The inspection door 15 is located above one side of the converter 9, at a height higher than the height of the molten steel inside the converter 9. When necessary, the inspection door 15 can be opened to observe the molten steel to ensure the normal operation of the descaling operation.

[0029] The working principle of this embodiment is the same as that of embodiment 2.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A separating device for dephosphorization slag of a smart steelmaking converter, characterized by: The equipment includes a main body (1), a feed inlet (2), a sliding trough (5), a filter collection box (6), a converter (9), a collection box (17), a discharge port (20), a load-bearing plate (22), a smoke exhaust device, a stirring device, and a moving device; the feed inlet (2) is located at the top of the main body (1); the discharge port (20) is located at the lower front side of the main body (1); The converter (9), sliding groove (5) and collection box (17) are installed in the main body of the equipment (1) from top to bottom; the filter collection box (6) is slidably connected to the sliding groove (5); there are two exhaust devices, which are installed on the front side of the converter (9) and the rear side of the sliding groove (5) respectively; the stirring device is located inside the converter (9); heaters (10) are provided on the front and rear sides of the converter (9); the top of the load-bearing plate (22) is fixedly connected to the bottom of the main body of the equipment (1), and the bottom is connected to the moving device.

2. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The stirring device includes a drive motor (4) and a stirring blade (11); the drive motor (4) is fixedly installed at the top center of the main body of the equipment (1), and its output end extends into the converter (9); the stirring blade (11) is located inside the converter (9) and is fixedly connected to the output end of the drive motor (4).

3. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The two exhaust devices are a first exhaust pipe (12) and a second exhaust pipe (13); both the first exhaust pipe (12) and the second exhaust pipe (13) are equipped with filters (14); the first exhaust pipe (12) is installed on the front side of the converter (9); the second exhaust pipe (13) is installed on the rear side of the sliding groove (5).

4. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The filter collection box (6) is provided with a handle groove (7) and a filter screen (8); the handle groove (7) is opened on the front side of the filter collection box (6); the filter screen (8) is fixedly installed inside the lower end of the filter collection box (6).

5. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The main body (1) of the equipment is provided with a servo motor (18) and a discharge auger (19); the servo motor (18) is fixedly installed at the lower rear end of the main body (1), and its output end extends through the main body (1) into the placement and collection box (17); the discharge auger (19) is located inside the placement and collection box (17) and is fixedly connected to the output end of the servo motor (18).

6. A separating device for dephosphorization slag of a smart steelmaking converter according to claim 5, characterized in that: The discharge port (20) is provided with a matching movable cover (3); the discharge port (20) is provided with a matching movable baffle (21).

7. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The converter (9) is provided with an inspection door (15) on the right side; the inspection door (15) is provided with a matching door handle (16).

8. The separating device for dephosphorization slag of a smart steelmaking converter according to claim 1, characterized in that: The moving device is a brakeable omnidirectional wheel (23).

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