Feeding device for ladle refining furnace

Abstract

The utility model provides a feeding device for a ladle refining furnace, which relates to the technical field of feeding of ladle refining furnaces, and comprises a box body, the upper side and the lower side of one end of the box body are respectively provided with a feed port and a liquid outlet, and the lower side of the other end of the box body is provided with a slag discharge port; the filter screen is cylindrical and is arranged in the box body, the upper side of one end of the filter screen is provided with a first opening connected with the feed port, and the lower side of the other end of the filter screen is provided with a second opening connected with the slag discharge port; the first conveying component is arranged in the filter screen and is used for conveying solid impurities in the materials; the problem that in the prior art, a rotary drum with a filtering function is arranged at the top end of the interior of a furnace shell to filter impurities in molten steel, and the impurities are not easy to clean is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging technology for ladle refining furnaces, and more specifically, relates to a charging device for ladle refining furnaces. Background Art

[0002] The ladle refining furnace (LF furnace) is an important device in iron and steel production, mainly used for refining the molten steel melted by primary melting furnaces, such as electric arc furnaces, open hearth furnaces, and converters, and at the same time can adjust the temperature of the molten steel, and is an important metallurgical device in the continuous casting and continuous rolling processes.

[0003] There will be more slag in the molten steel after primary melting. If it is directly transported into the ladle refining furnace, it will cause too much slag generated during the molten steel refining process, affecting the refining efficiency and quality of the molten steel.

[0004] In the prior art, some charging devices for ladle refining furnaces achieve the filtration of impurities in the molten steel by setting a rotating cylinder with a filtering function at the inner top of the furnace shell. However, in the above method, impurities are easily accumulated inside the rotating cylinder and are not easy to clean, and at the same time, it is easy to affect the filtering and flowing effect of the molten steel. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a charging device for ladle refining furnaces to solve the problem that impurities are not easy to clean in the prior art, which realizes the filtration of impurities in the molten steel by setting a rotating cylinder with a filtering function at the inner top of the furnace shell.

[0006] To achieve the above purpose, the utility model provides a charging device for ladle refining furnaces, including:

[0007] A box body, on the upper side and the lower side of one end of the box body, a feed inlet and a liquid outlet are respectively arranged, and on the lower side of the other end of the box body, a slag discharge port is arranged;

[0008] A filter screen, the filter screen is cylindrical and is arranged inside the box body. On the upper side of one end of the filter screen, a first opening connected to the feed inlet is arranged, and on the lower side of the other end of the filter screen, a second opening connected to the slag discharge port is arranged;

[0009] A first conveying component, the first conveying component is arranged inside the filter screen and is used for conveying solid impurities in the material.

[0010] Optionally, the box body is inclined, and one end of the box body is lower than the other end of the box body.

[0011] Optionally, the first conveying component includes:

[0012] A first driving motor, the first driving motor is arranged at one end of the box body;

[0013] A rotating shaft is rotatably arranged inside the filter net, and one end of the rotating shaft is connected to the first driving motor;

[0014] Conveyor blades are arranged on the outer side of the rotating shaft.

[0015] Optionally, it further includes a scraper, the scraper is connected to the rotating shaft, the scraper is arranged inside the filter net and contacts the inner wall of the filter net.

[0016] Optionally, a plurality of elastic connection structures are arranged along the radial direction of the outer side of the rotating shaft, and the scraper is connected through the elastic connection structures.

[0017] Optionally, the elastic connection structure includes a fixed cylinder and a telescopic column slidably arranged inside the fixed cylinder, the fixed cylinder is fixed on the outer side of the rotating shaft, the telescopic column is connected to the scraper, and an elastic member is arranged between the fixed cylinder and the telescopic column.

[0018] Optionally, it further includes a second conveying component, and the second conveying component is arranged below the slag discharge port.

[0019] Optionally, the second conveying component includes a conveyor belt assembly and baffles arranged on both sides of the conveyor belt assembly.

[0020] Optionally, a feed control valve and a liquid outlet control valve are respectively arranged in the feed inlet and the liquid outlet.

[0021] Optionally, a pair of support feet are respectively arranged at both ends of the box body.

[0022] The present utility model provides a feeding device for a ladle refining furnace, and its beneficial effects are as follows: The feeding device for the ladle refining furnace has a box body, a cylindrical filter net is arranged inside the box body, a first conveying component is arranged inside the filter net, a feed inlet and a liquid outlet at one end of the box body can respectively realize the entry of materials, that is, the molten steel after primary refining. The materials enter the filter net through the feed inlet and the first opening, the molten steel flows out from the liquid outlet after being filtered by the filter net, and can be input into the refining furnace. The solid impurities in the materials cannot pass through the filter net and remain in the filter net, and are conveyed by the first conveying component and discharged to the slag discharge port. This not only ensures the quality of the molten steel entering the refining furnace, but also can conveniently discharge impurities in real time.

[0023] Other features and advantages of the present utility model will be described in detail in the following specific implementation section. Description of the Drawings

[0024] The exemplary embodiments of the present utility model will be described in more detail with reference to the accompanying drawings, and the above and other objects, features, and advantages of the present utility model will become more apparent. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0025] Figure 1 Fig. 4 shows a schematic diagram of the overall structure of a feeding device for a ladle refining furnace according to an embodiment of the present utility model.

[0026] Figure 2 shows Figure 1 a schematic diagram of another perspective.

[0027] Figure 3 Fig. 14 shows a schematic diagram of the internal structure of a box body of a feeding device for a ladle refining furnace according to an embodiment of the present utility model.

[0028] Figure 4 Fig. 18 shows a schematic diagram of the connection structure between a first conveying component and a scraper of a feeding device for a ladle refining furnace according to an embodiment of the present utility model.

[0029] Figure 5 Fig. 22 shows a schematic diagram of the structure of a second conveying component of a feeding device for a ladle refining furnace according to an embodiment of the present utility model.

[0030] Figure 6 Fig. 26 shows a schematic diagram of the structure of an elastic connection structure of a feeding device for a ladle refining furnace according to an embodiment of the present utility model.

[0031] Description of reference numerals:

[0032] 1. Box body; 2. Filter screen; 3. Feed inlet; 4. Rotating shaft; 5. First driving motor; 6. Conveying blades; 7. Scraper; 8. Elastic connection structure; 9. Slag discharge port; 10. Second conveying component; 11. Liquid discharge port; 12. Fixed cylinder; 13. Telescopic column; 14. Telescopic groove; 15. Spring; 16. Baffle; 17. Conveying roller; 18. Second driving motor; 19. Conveyor belt; 20. Support leg; 21. Fixed foot; 22. Feed control valve; 23. Liquid discharge control valve; 24. Flow guiding slope. Detailed embodiments

[0033] The preferred embodiments of the present utility model will be described in more detail below. Although the preferred embodiments of the present utility model are described below, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0034] As Figures 1 to 3 shown, the utility model provides a feeding device for a ladle refining furnace, comprising:

[0035] A box body 1, with a feeding port 3 and a liquid outlet 11 respectively arranged on the upper side and the lower side at one end of the box body 1, and a slag discharge port arranged on the lower side at the other end of the box body 1;

[0036] A filter screen 2, which is cylindrical and arranged inside the box body 1. There is a first opening connected to the feeding port 3 on the upper side at one end of the filter screen 2, and a second opening connected to the slag discharge port on the lower side at the other end of the filter screen 2;

[0037] A first conveying component, which is arranged inside the filter screen 2 and is used for conveying solid impurities in the material.

[0038] Specifically, to solve the problem that in the prior art, by setting a rotating cylinder with a filtering function at the inner top of the furnace shell to filter impurities in molten steel, there is a problem that the impurities are not easy to clean up; the feeding device for a ladle refining furnace provided by the utility model has a box body 1, with a cylindrical filter screen 2 arranged inside the box body 1, and a first conveying component arranged inside the filter screen 2. The feeding port 3 and the liquid outlet 11 at one end of the box body 1 can respectively realize the entry of materials, that is, molten steel after primary refining. The materials enter the filter screen 2 through the feeding port 3 and the first opening. The molten steel flows out through the liquid outlet 11 after being filtered by the filter screen 2 and can be input into the refining furnace. The solid impurities in the materials cannot pass through the filter screen 2 and remain in the filter screen 2, and are conveyed by the first conveying component and discharged to the slag discharge port, which not only ensures the quality of the molten steel entering the refining furnace, but also can discharge impurities conveniently in real time.

[0039] Optionally, the box body 1 is inclined, and one end of the box body 1 is lower than the other end of the box body 1.

[0040] Specifically, the inclined box body 1 forms a diversion slope surface 24 on the bottom surface of the box body 1. In this way, during the conveying process of the first conveying component for the solid impurities in the materials, the molten steel filtered by the filter screen 2 can flow more conveniently towards the liquid outlet 11 and flow out through the liquid outlet 11, and then be input into the refining furnace.

[0041] Optionally, the first conveying component includes:

[0042] A first driving motor 5, which is arranged at one end of the box body 1;

[0043] A rotating shaft 4, which is rotatably arranged inside the filter screen 2, and one end of the rotating shaft 4 is connected to the first driving motor 5;

[0044] Conveying blades 6, which are arranged on the outer side of the rotating shaft 4.

[0045] Specifically, the first conveying component uses the first driving motor 5 to drive the rotating shaft 4 to drive the conveying blades 6 to rotate, so as to convey the solid impurities in the material in the box body 1, and discharge the solid impurities in the material through the second opening and the slag discharge port.

[0046] Optionally, it further includes a scraper 7. The scraper 7 is connected to the rotating shaft 4, and the scraper 7 is arranged inside the filter screen 2 and contacts the inner wall of the filter screen 2.

[0047] Specifically, the setting of the scraper 7 can scrape the impurities on the filter screen 2 on the inner wall of the filter screen 2, so that it can be better output from the slag discharge port under the conveying action of the first conveying component.

[0048] Optionally, a plurality of elastic connection structures 8 are arranged along the radial direction of the outer side of the rotating shaft 4, and the scraper 7 is connected through the elastic connection structures 8.

[0049] Specifically, as Figure 4 shown, the scraper 7 is connected to the rotating shaft 4 through the elastic connection structure 8, so that the scraper 7 can apply an elastic force to the filter screen 2 while contacting the filter screen 2, improving the scraping effect of the scraper 7 on the impurities and better realizing the cleaning of the impurities; during the scraping process of the impurities in the filter screen 2 by the scraper 7, it will be squeezed, so that the scraper 7 moves to squeeze the elastic component, so that while the scraper 7 fits on the inner surface of the filter screen 2, rigid extrusion is avoided, which can avoid the rigid friction between the impurities stuck on the filter screen 2 and the scraper 7, improve the cleaning smoothness of the scraper 7 on the filter screen 2, and at the same time ensure the fit between the scraper 7 and the filter screen 2; at the same time, improve the seepage effect of the filter screen 2 on the molten steel and ensure the fluidity of the filter screen 2.

[0050] Optionally, the elastic connection structure 8 includes a fixed cylinder 12 and a telescopic column 13 slidably arranged in the fixed cylinder 12. The fixed cylinder 12 is fixed on the outer side of the rotating shaft 4, the telescopic column 13 is connected to the scraper 7, and an elastic component is arranged between the fixed cylinder 12 and the telescopic column 13.

[0051] Specifically, as Figure 6 shown, a telescopic groove 14 is arranged in the fixed cylinder 12, the telescopic column 13 is inserted into the telescopic groove 14, and under the action of the elastic component, the telescopic column 13 has a tendency to extend outwards, driving the scraper 7 to press against the inner wall of the cylindrical filter screen 2 with an elastic force.

[0052] In this embodiment, the elastic component is a spring 15.

[0053] Optionally, it further includes a second conveying component 10, and the second conveying component 10 is arranged below the slag discharge port.

[0054] Specifically, the setting of the second conveying component 10 facilitates the further conveyance of the impurities discharged through the slag discharge port.

[0055] Optionally, the second conveying component 10 includes a conveyor belt assembly and baffles 16 arranged on both sides of the conveyor belt assembly.

[0056] Specifically, the setting of the baffles 16 can prevent the impurities from spilling out during the conveying process.

[0057] In this embodiment, as Figure 5 shown, the conveyor belt assembly includes conveying rollers 17 arranged between the two baffles 16, and a second driving motor 18 is arranged in cooperation with the conveying rollers 17. A conveyor belt 19 is sleeved outside the conveying rollers 17. The impurities discharged through the slag discharge port will fall on the conveyor belt 19. The second driving motor 18 can drive the conveying rollers 17 to rotate, thereby realizing the movement of the conveyor belt 19 and the conveyance of the impurities, and then timely conveying the discharged impurities away. Among them, the conveyor belt 19 is preferably a chain plate conveyor belt 19 with better high-temperature resistance.

[0058] Optionally, a feed control valve 22 and a liquid discharge control valve 23 are respectively arranged in the feed inlet 3 and the liquid outlet 11.

[0059] Specifically, the feed control valve 22 can realize the feed control at the feed inlet 3, and the liquid discharge control valve 23 can control the opening and closing at the liquid outlet 11, thereby realizing the feeding control of the ladle refining furnace.

[0060] Optionally, a pair of support feet are respectively arranged at both ends of the box body 1.

[0061] Specifically, the support feet include support legs 20 and fixing feet 21 arranged at the lower ends of the support legs 20. The fixing feet 21 are plate-shaped, and their setting can realize the connection between the box body 1 and the external installation interface. The connection method can be selected as a bolt-type detachable connection to realize the stable support of the box body 1.

[0062] In summary, when the feeding device for the ladle refining furnace provided by the present utility model is in use, taking the feeding of the refining furnace at one time as an example: connect the feeding port 3 to the molten steel output end after primary refining, and connect the liquid outlet pipe to the input end of the ladle refining furnace. In this way, when feeding the molten steel after primary refining for refining, the molten steel after primary refining is transported into the box body 1 through the feeding port 3, and enters the inside of the filter screen 2 through the first opening. The impurities in the material will be intercepted by the filter screen 2, and the filtered molten steel will pass through the filter screen 2 and be transported into the external ladle refining furnace through the liquid outlet pipe, realizing the feeding of the ladle refining furnace. In this way, the interception and filtration of impurities can be realized during the feeding of the ladle refining furnace, improving the refining effect. During this process, start the first driving motor 5. Through the first driving motor 5, the rotating shaft 4 can be driven to drive the spiral conveying blade 6 to rotate. Through the conveying blade 6, the impurities intercepted in the filter screen 2 can be conveyed obliquely upward and discharged out through the slag discharge port 9, thereby realizing the cleaning of the intercepted impurities. And during this process, through the action of the conveying blade 6, the intercepted impurities can move reversely upward inside the filter screen 2, and the molten steel carried by the impurities can be percolated, reducing the amount of molten steel carried by the impurities and improving the cleaning effect of the impurities. Synchronously, during the rotation of the rotating shaft 4, the scraper 7 will be driven to rotate synchronously through the cooperation of the fixed cylinder 12, the telescopic column 13 and the elastic member. Through the scraper 7, the inner surface of the filter screen 2 can be scraped, thereby improving the percolation effect of the filter screen 2 on the molten steel and ensuring the fluidity of the filter screen 2. At the same time, during the scraping process of the inside of the filter screen 2 by the scraper 7, it will be squeezed, so that the scraper 7 drives the telescopic rod to move and squeeze the elastic member, so that while the scraper 7 fits on the surface of the filter screen 2, rigid extrusion is avoided. In this way, when impurities are stuck on the filter screen 2, the rigid friction between the scraper 7 and the impurities can be avoided, improving the cleaning smoothness of the scraper 7 on the filter screen 2, and at the same time ensuring the fit between the scraper 7 and the filter screen 2. The impurities discharged through the slag discharge port 9 will fall on the conveyor belt assembly. Start the second driving motor 18, and control the rotation of the conveying roller 17 through the second driving motor 18, so as to realize the movement control of the conveyor belt 19, so as to facilitate the timely transportation of the discharged impurities and realize the cleaning of the impurities.

[0063] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A feeding device for a ladle refining furnace, characterized in that, Comprising: A box body, on the upper side and the lower side of one end of the box body, a feed inlet and a liquid outlet are respectively arranged, and on the lower side of the other end of the box body, a slag discharge port is arranged; A filter screen, the filter screen is cylindrical and is arranged inside the box body, on the upper side of one end of the filter screen, a first opening connected to the feed inlet is arranged, and on the lower side of the other end of the filter screen, a second opening connected to the slag discharge port is arranged; A first conveying component, the first conveying component is arranged inside the filter screen and is used for conveying solid impurities in the material.

2. The feeding device for the ladle refining furnace according to claim 1, characterized in that, The box body is inclined, and one end of the box body is lower than the other end of the box body.

3. The feeding device for a ladle refining furnace according to claim 1, characterized in that, The first conveying component includes: A first driving motor, the first driving motor is arranged at one end of the box body; A rotating shaft, the rotating shaft is rotatably arranged inside the filter screen, and one end of the rotating shaft is connected to the first driving motor; Conveying blades, the conveying blades are arranged on the outer side of the rotating shaft.

4. The feeding device for a ladle refining furnace according to claim 3, characterized in that, It further includes a scraping plate, the scraping plate is connected to the rotating shaft, the scraping plate is arranged inside the filter screen and is in contact with the inner wall of the filter screen.

5. The feeding device for a ladle refining furnace according to claim 4, characterized in that, A plurality of elastic connection structures are arranged along the radial direction of the outer side of the rotating shaft, and the scraping plate is connected through the elastic connection structures.

6. The charging device for a ladle refining furnace according to claim 5, characterized in that, The elastic connection structure includes a fixed cylinder and a telescopic column slidably arranged inside the fixed cylinder, the fixed cylinder is fixed on the outer side of the rotating shaft, the telescopic column is connected to the scraping plate, and an elastic component is arranged between the fixed cylinder and the telescopic column.

7. The feeding device for a ladle refining furnace according to claim 1, characterized in that, It further includes a second conveying component, the second conveying component is arranged below the slag discharge port.

8. The feeding device for the ladle refining furnace according to claim 7, characterized in that, The second conveying component includes a conveyor belt assembly and baffles arranged on both sides of the conveyor belt assembly.

9. The feeding device for a ladle refining furnace according to claim 1, characterized in that, A feed control valve and a liquid outlet control valve are respectively arranged in the feed inlet and the liquid outlet.

10. The feeding device for a ladle refining furnace according to claim 1, characterized in that, A pair of support feet are respectively arranged at both ends of the box body.

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