A multi-functional steelmaking furnace equipment

Abstract

This invention provides a multifunctional steelmaking furnace device, relating to the field of steelmaking furnace technology, including a converter and slag interceptors. The converter includes a shell, a furnace lining, and a furnace opening. Its key feature is that it further includes a guiding mechanism, a sliding nozzle mechanism, and an air blowing mechanism. The guiding mechanism includes a sleeve and an inner tube, with the sleeve having a port for guiding the slag interceptors. The sliding nozzle mechanism includes a seat brick, an upper sliding plate, an upper nozzle, a lower sliding plate, a lower nozzle, and a flip-top. The air blowing mechanism includes an air inlet, a first distribution pipe, a third distribution pipe, a bottom nozzle, and a top nozzle. This invention allows for flow diversion via the sleeve. The surface tension of the molten steel and the viscous force formed at the upper port of the sleeve and the inner tube port are greater, resulting in a lower eddy current velocity at the upper port of the sleeve and a correspondingly reduced flow rate of the entrained slag layer.

Description

Technical Field

[0001] This invention relates to the field of steelmaking furnace technology, and in particular to a multifunctional steelmaking furnace device. Background Technology

[0002] Multifunctional steelmaking furnace equipment is specifically designed for processing pig iron. It removes impurities (phosphorus, sulfur, etc.) through oxidation and slag refining to achieve the smelting of wrought iron or steel. It also allows for precise control of composition (such as adding chromium and nickel) in the processing of molten iron alloys. During steelmaking, the presence of raw materials and fluxes combines with impurities in the molten steel within the high-temperature furnace to form a complex oxide melt, namely slag. Slag formation occurs throughout the entire steelmaking process (especially in converter and electric arc furnace smelting) and is an inevitable product of physicochemical reactions, raw material impurity separation, and process control.

[0003] To prevent slag from entering the ladle with molten steel (a process known as "slag discharge"), existing steelmaking furnaces typically employ three main methods to intercept slag: mechanical interception, pneumatic / dynamic control, and intelligent collaborative methods. Among these, mechanical interception is the mainstream application, which uses physical devices to form a barrier near the tapping spout to intercept slag.

[0004] However, the guide rod of the mechanical slag interceptor needs to be precisely aligned. At the same time, since the slag interceptor needs to be guided by a vortex to block the steel tapping port, a vortex has already been formed at the steel tapping port when the slag interceptor is deployed. The flow velocity in this vortex is relatively high and is directed towards the steel tapping port. Since the density of the slag layer is relatively low, it is more easily attracted by the vortex. Therefore, the vortex will carry some of the slag layer out of the steel tapping port. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a multi-functional steelmaking furnace that can solve the technical problem of slag entrainment by eddy currents in the prior art.

[0006] In a first aspect, the present invention provides a multifunctional steelmaking furnace device, including a converter and a slag catcher for intercepting slag. The converter includes a shell, a furnace lining, and a furnace opening, and further includes a guiding mechanism, a sliding nozzle mechanism, and a blowing mechanism.

[0007] The guiding mechanism includes a sleeve and an inner tube, and the sleeve has a port for guiding the debris-catching dart;

[0008] The sliding gate mechanism includes a seat brick, an upper sliding plate, an upper water inlet, a lower sliding plate, a lower water inlet, and a flip cover;

[0009] The blowing mechanism includes an air inlet, a first distribution pipe, a third distribution pipe, a bottom nozzle, and a top nozzle;

[0010] The sleeve is coaxially sleeved around the outer periphery of the inner tube and fixedly installed inside the converter by a support rod. The inner wall of the sleeve and the outer wall of the inner tube can form a siphon channel that communicates with the inside of the inner tube.

[0011] The seat brick is detachably mounted on the outer shell, and the bottom nozzle and top nozzle are respectively opened on the side and the port of the sleeve to form a bottom blowing air channel and a top blowing air channel with adjustable flow when the slag baffle is attached to the port.

[0012] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0013] In this embodiment of the invention, the flow is diverted through the casing. The surface tension of the molten steel and the viscous force formed at the upper end of the casing and the inner tube end are greater, and the eddy current velocity formed at the upper end of the casing is smaller, thus reducing the flow rate of the entrained slag layer. Only after the slag-blocking dart is placed and the upper end of the casing is blocked, the inner wall of the casing and the outer wall of the inner tube form a siphon channel that communicates with the inside of the inner tube. This makes it difficult for the surface slag layer to directly enter the inner tube through the casing. When the surface slag layer is near the lower end of the casing, the siphon automatically stops because the overall liquid level is lower than that of the inner tube. Attached Figure Description

[0014] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of an existing furnace equipment.

[0016] Figure 2 This is a schematic diagram of the converter and sliding gate mechanism of a multifunctional steelmaking furnace equipment provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the initial tilting section structure of a multi-functional steelmaking furnace equipment provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the tilting and later-stage cross-section structure of a multi-functional steelmaking furnace equipment provided in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the internal structure of a converter in a multifunctional steelmaking furnace provided in an embodiment of the present invention.

[0020] Figure 6 This invention provides a multi-functional steelmaking furnace device. Figure 5 Enlarged schematic diagram of structure A in the middle.

[0021] Figure 7 This is a schematic diagram of the sliding gate mechanism of a multifunctional steelmaking furnace provided in an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the lower slide plate and water outlet structure of a multifunctional steelmaking furnace equipment provided in an embodiment of the present invention.

[0023] Figure 9 This is a schematic diagram from another perspective of the sliding gate mechanism of a multifunctional steelmaking furnace provided in an embodiment of the present invention.

[0024] Figure 10 This is a schematic diagram of the drive unit and sliding gate structure of a multifunctional steelmaking furnace equipment provided in an embodiment of the present invention.

[0025] Figure 11 This is a schematic diagram of the initial flow direction of a multi-functional steelmaking furnace equipment during tilting, provided in an embodiment of the present invention.

[0026] Figure 12 This is a schematic diagram of the mid-term flow direction of a multi-functional steelmaking furnace equipment provided in an embodiment of the present invention.

[0027] Figure 13 This is a schematic diagram of the flow direction after tilting of a multi-functional steelmaking furnace equipment provided in an embodiment of the present invention.

[0028] Figure 14 This is a schematic diagram of the flow channel structure of a multifunctional steelmaking furnace provided in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1-Converter; 11-Furnace opening; 12-Furnace lining; 13-Outer shell; 14-Refractory filling layer; 15-Shell; 16-Inner tube; 17-Support rod; 18-Support platform; 2-Sliding nozzle mechanism; 21-Bottom brick; 22-Upper sliding plate; 23-Upper nozzle; 24-Lower sliding plate; 25-Lower nozzle; 26-Flip cover; 3-Drive unit; 31-Telescopic rod; 4-Air inlet; 41-First distribution pipe; 42-Second distribution pipe; 42a-Front section; 42b-Lower sliding plate section; 42c-Upper sliding plate section; 42d-Final section; 421-Heat dissipation channel; 422-Blocking block; 43-Third distribution pipe; 44-Bottom nozzle; 45-Top nozzle; 5-Slag baffle; 6-Molten steel; 61-Slag layer; 62-Sediment layer; 7-Feeding rod. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0033] Reference manual attached Figure 1 This illustrates an existing steelmaking furnace device.

[0034] It should be noted that the existing technology involves opening a tapping port on the side wall of converter 1, allowing raw materials to be fed into converter 1 in a vertical position through furnace opening 11. Subsequently, converter 1 melts the raw materials in a vertical position to form molten steel 6. During the high-temperature processing, the molten steel 6 forms slag, which naturally floats to the surface under static or low-disturbance conditions to form a slag layer 61. Additionally, some slag impurities (such as Al2O3 / SiO2 residues) formed due to incomplete deoxidation reactions precipitate to form a sediment layer 62.

[0035] In the existing technology, molten steel 6 is discharged through the tap hole by tilting the converter 1. In the initial stage of discharge, the slag layer 61 floats on the surface of the molten steel 6 and does not flow out of the tap hole. Then, when the slag layer 61 approaches the tap hole, the slag-blocking dart 5 is thrown into the molten steel 6 by the throwing rod 7 mounted on the slag-blocking dart car. The slag-blocking dart 5 is guided by the vortex formed in the tap hole by the molten steel 6 to block the tap hole, thereby intercepting the slag layer 61. However, because the slag-blocking dart 5 needs the guidance of the vortex to block the tap hole, a vortex has already formed at the tap hole when the slag-blocking dart 5 is thrown. The flow velocity in the vortex is relatively large and is directed towards the tap hole. Since the density of the slag layer 61 is low, it is more easily attracted by the vortex. Therefore, the vortex will carry part of the slag layer 61 out of the tap hole.

[0036] Reference manual attached Figures 2 to 14 The diagram shows a structural schematic of a multifunctional steelmaking furnace provided in an embodiment of the present invention.

[0037] The present invention provides a structure for a multifunctional steelmaking furnace, comprising a converter 1 and slag catchers 5 for intercepting slag. The converter 1 includes an outer shell 13, a furnace lining 12, and a furnace opening 11, and also includes a guiding mechanism, a sliding nozzle mechanism 2, and a blowing mechanism.

[0038] The guiding mechanism includes sleeve 15 and inner tube 16 (e.g. Figure 6 (as shown), and the sleeve 15 has a port for guiding the dart 5;

[0039] The sliding gate mechanism 2 includes a seat brick 21, an upper slide plate 22, an upper gate 23, a lower slide plate 24, a lower gate 25, and a flip cover 26;

[0040] The air blowing mechanism includes an air inlet 4, a first distribution pipe 41, a third distribution pipe 43, a bottom nozzle 44, and a top nozzle 45;

[0041] The sleeve 15 is coaxially sleeved around the outer periphery of the inner tube 16 and fixedly installed inside the converter 1 by the support rod 17. The inner wall of the sleeve 15 and the outer wall of the inner tube 16 can form a siphon channel that communicates with the inside of the inner tube 16.

[0042] The seat brick 21 is detachably mounted on the outer shell 13. The bottom nozzle 44 and the top nozzle 45 are respectively opened on the side and the port of the sleeve 15 to form a bottom blowing air channel and a top blowing air channel with adjustable flow when the slag baffle 5 is attached to the port.

[0043] The beneficial effects of the technical solution provided by the embodiments of the present invention include at least the following: the flow is diverted by the sleeve 15, the surface tension of the molten steel 6 and the viscous force formed at the upper port of the sleeve 15 and the port of the inner tube 16 are greater, the eddy velocity formed at the upper port of the sleeve 15 is smaller, and the flow rate of the entrained slag layer 61 is reduced accordingly; only after the slag-blocking dart 5 is placed and the upper port of the sleeve 15 is blocked, the inner wall of the sleeve 15 and the outer wall of the inner tube 16 form a siphon channel that communicates with the inside of the inner tube 16, making it difficult for the surface slag layer 61 to directly enter the inner tube 16 through the sleeve 15, and when the surface slag layer 61 is close to the lower port of the sleeve 15, the siphon automatically stops because the overall liquid level is lower than that of the inner tube 16.

[0044] In this embodiment of the invention, the sleeve 15 is fitted over the inner tube 16 and has an upper port and a lower port. The upper port is used to intercept the slag-blocking dart 5, while the lower port is fixed by the support rod 17 (the specific fixing method is detailed below). In the initial stage of the converter 1 tilting, the slag-blocking dart 5 has not yet been deployed. At this time, the upper port of the sleeve 15 is open, therefore the inner wall of the sleeve 15 does not form a semi-closed structure surrounding the inner tube 16. That is, the inner wall of the sleeve 15 and the outer wall of the inner tube 16 do not form a siphon channel in the initial stage of tilting (i.e.,...). Figure 11(For reference), at this time, the molten steel 6 flows out in two streams: the first stream enters the inner tube 16 along the upper end of the sleeve 15 and is led out; the second stream merges with the first stream along the lower end of the sleeve 15 and enters the inner tube 16 and is led out.

[0045] The first path is most likely to generate eddies, specifically at the upper end of the sleeve 15. Since the molten steel 6 is divided into two paths, the flow rate of the first path is weakened compared to the overall outflow. In the prior art, the outflow is concentrated at the taphole, resulting in a large overall inertia and thus high eddies concentrated at the taphole edge. In contrast, the first path has a smaller overall inertia, leading to greater surface tension of the molten steel 6 and greater viscous forces at the upper end of the sleeve 15 and the inner tube 16. Consequently, the eddy velocity at the upper end of the sleeve 15, as described in this invention, is lower, and the flow rate of the entrained slag layer 61 is correspondingly reduced.

[0046] Furthermore, the guiding effect of the upper port of the casing 15 on the slag-blocking dart 5 (details of the guiding method are described below) compensates for the influence of the low-velocity eddy current on the slag-blocking dart 5. During the middle stage of dumping (i.e., when the slag layer 61 approaches the upper port of the casing 15), the slag-blocking dart 5 is guided by the upper port of the casing 15. Figure 12 (For reference), when the baffle 5 is deployed via the deployment rod 7, the baffle 5, under the influence of gravity and guided by eddy currents, seals the upper port of the casing 15, leaving only the lower port of the casing 15 open. That is, this only occurs in the later stages of dumping after the baffle 5 is deployed and seals the upper port of the casing 15 (as...). Figure 13 (For reference) The inner wall of the sleeve 15 and the outer wall of the inner tube 16 form a siphon channel that communicates with the inside of the inner tube 16. At this time, the siphon channel generates a large suction force to make the molten steel 6 flow out of the inner tube 16 along the lower port of the sleeve 15. Since the lower port of the sleeve 15 is located close to the outer shell 13, it is difficult for the surface slag layer 61 to directly enter the inner tube 16 through the sleeve 15. When the surface slag layer 61 is close to the lower port of the sleeve 15, the siphon automatically stops because the overall liquid level is lower than that of the inner tube 16.

[0047] It should be noted that the support rod 17 has a pipe inside, with the upper end of the pipe connected to the top nozzle 45 and the bottom nozzle 44, and the lower end connected to the third distribution pipe 43. Inert gas (N2 / Ar) is transported to the third distribution pipe 43 through the air inlet 4. In the initial stage of pouring, the air volume of the top nozzle 45 and the bottom nozzle 44 is balanced. The top nozzle 45 and the bottom nozzle 44 form an air curtain barrier at the upper and lower ports of the sleeve 15, respectively, which blows away the slag layer 61 with lower density and lighter mass (the specific setting method of forming an air curtain barrier by inert gas can be referred to the converter tapping port installation structure disclosed in CN120272669A, which is common technical knowledge to those skilled in the art and will not be described in detail here). During the later stages of dumping, the baffle 5, under the influence of gravity and eddy current, blocks the upper end of the sleeve 15, thus blocking the top nozzle 45. This allows gas to escape only from the bottom nozzle 44, increasing the gas flow rate within the bottom nozzle 44 and further preventing the scum layer 61 from entering the inner pipe 16. The design of the sliding nozzle mechanism 2 is common knowledge to those skilled in the art and will not be elaborated upon here.

[0048] In one possible implementation, the axis of the sleeve 15 and the inner tube 16 is inclined toward the bottom of the converter 1, and a refractory filling layer 14 is provided inside the converter 1 to support the inner tube 16 and the sleeve 15.

[0049] Specifically, the refractory filling layer 14 is used to connect the furnace lining 12 and the outer shell 13, and the refractory filling layer 14 is enclosed by the furnace lining 12 to form a concave cavity, the cross-section of which is as follows: Figures 11 to 13 As shown, the inner tube 16 is fixedly embedded in the bottom surface of the concave cavity, and the sleeve 15 is fixedly installed in the concave cavity by the support rod 17. The bottom surface of the concave cavity is parallel to the end faces of the inner tube 16 and the sleeve 15, thereby stabilizing the inner tube 16 and the sleeve 15.

[0050] Furthermore, the axes of the sleeve 15 and the inner tube 16 form an acute angle with the side of the converter 1, with the tip of the acute angle pointing towards the bottom of the converter 1, so that the plane of the molten steel 6 can reach a horizontal state before the converter 1 is placed horizontally during the tilting process (e.g., Figure 4 As shown in the diagram, at this time, the angle formed between the furnace linings 12 of converter 1 can effectively guide the sediment layer 62 to remain, and the liquid level of molten steel 6 is perpendicular to the upper port of the casing 15 and the inner tube 16. After the slag baffle 5 is placed and the upper port of the casing 15 is blocked, that is, in the later stage of pouring, the molten steel 6 is drawn into the inner tube 16 from the lower port of the casing 15. The slag layer 61 drops with the liquid level of molten steel 6, and the siphon effect automatically stops after the liquid level of the slag layer 61 is lower than the lower port of the casing 15.

[0051] In this embodiment of the invention, the included angle formed between the furnace linings 12 of the converter 1 effectively guides the sediment layer 62 to remain, preventing the sediment layer 62 from flowing out with the molten steel 6 and reducing the impurity content. The flow direction of the molten steel 6 in the inner tube 16 is consistent with the direction of gravity, which can improve the flow effect of the molten steel 6.

[0052] In one possible implementation, the port of the sleeve 15 forms a bucket-shaped structure with decreasing inner diameter along the moving direction of the slag catcher 5.

[0053] Specifically, the slag trap 5 has a conical surface, and the bucket-shaped structure at the upper end of the casing 15 is wider at the top and narrower at the bottom, with an inclined inner wall. The bucket-shaped structure matches the conical surface of the slag trap 5. During the deployment of the slag trap 5, the tail end of the slag trap 5 is guided by the bucket-shaped structure to move automatically toward the axis of the casing 15, thereby sealing the upper end of the casing 15 under the combined action of gravity and eddy current, so that the inner wall of the casing 15 and the inner tube 16 form a siphon channel.

[0054] In this embodiment of the invention, the tail end of the slag-blocking dart 5 is automatically moved toward the axis of the sleeve 15 by the guiding effect of the upper port of the sleeve 15, thereby compensating for the low-velocity eddy current's influence on the slag-blocking dart 5.

[0055] In one possible implementation, the sliding gate mechanism 2 further includes a support platform 18 and a drive unit 3, the drive unit 3 including a telescopic rod 31;

[0056] The support platform 18 is fixedly mounted on the outer casing 13 and is used to assemble the seat brick 21 (e.g. Figure 6 (as shown)

[0057] The drive unit 3 is fixedly mounted on the support platform 18 and the telescopic rod 31 is engaged with the lower slide plate 24 to drive the lower slide plate 24 to slide axially.

[0058] Specifically, the drive unit 3 is equipped with a control program, which includes a detection unit for detecting the slag content in the molten steel 6 (a vibration sensor or electromagnetic sensor can be used for slag detection, a technology known to those skilled in the art) and a control module. During the later stages of pouring, as the slag layer 61 descends, the boundary layer between the slag layer 61 and the molten steel 6 will preferentially reach the lower port of the sleeve 15. Subsequently, the molten steel 6 in the siphon channel will be mixed with some of the slag layer 61. When the slag content exceeds the threshold set by the detection unit, the drive unit 3 drives the telescopic rod 31 to extend, causing the upper sliding plate 22 and the lower sliding plate 24 to intersect, i.e., the upper water inlet 23 and the lower water inlet 25 to intersect. At this point, the molten steel 6 is cut off. The cylinder receiving molten steel 6 is then switched, and the upper sliding plate 22 is driven by the drive unit 3 to align with the lower sliding plate 24, thereby connecting the upper nozzle 23 and the lower nozzle 25. At this time, the gushing liquid is a mixture of molten steel 6 and part of the slag layer 61, which is used for recycling. The suction effect is improved through the siphon effect until the liquid level of the slag layer 61 drops below the port of the sleeve 15. At this time, only the mixture of the slag layer 61 and the sediment layer 62 remains in the converter 1, which is then collected uniformly. The sliding nozzle mechanism 2 used above is common knowledge to those skilled in the art and will not be described in detail here.

[0059] In this embodiment of the invention, the sliding nozzle mechanism 2 is configured to promptly stop the discharge of molten steel 6 based on the slag discharge rate, thereby classifying and recycling the mixture of molten steel 6 and slag layer 61, and the mixture of slag layer 61 and sediment layer 62. In a conventional converter 1, slag discharge is often caused by eddies carrying away the slag layer 61 floating on the surface. The carrying force of the eddies can "tear" the boundary between the original slag layer 61 and molten steel 6. At the same time, the time relationship between the slag discharge rate and the dumping process is relatively ambiguous. It is necessary to shut down the sliding nozzle mechanism 2 and allow it to stand after the slag discharge rate reaches a threshold, so that the boundary between the slag layer 61 and molten steel 6 becomes clear again before continuing to discharge steel. However, in this invention, the vortex velocity is relatively small in the initial stage of pouring, so less slag is carried in. In the middle stage of pouring, liquid is mainly introduced through the lower port of the sleeve 15 to avoid sucking up the slag layer 61. Only in the later stage of pouring, when the interface between the slag layer 61 and the molten steel 6 is lower than the lower port of the sleeve 15, will the slag content increase significantly. The relationship between the slag discharge rate and the pouring process is relatively clear, making it easier for operators to design time nodes.

[0060] In one possible implementation, the flip cover 26 is rotatably connected to the side wall of the seat brick 21, and the flip cover 26 is slidably connected to the lower slide plate 24.

[0061] The inner sides of the upper slide plate 22 and the lower slide plate 24 are provided with concave surfaces, and the inner walls of the concave surfaces form a toothed structure that fits the shape of the outer walls of the upper water outlet 23 and the lower water outlet 25 and has protruding clamping parts.

[0062] Specifically, the upper slide plate 22 is fixedly mounted on the seat brick 21. When the flip cover 26 is closed, the lower slide plate 24 engages with the telescopic rod 31, allowing the drive unit 3 to slide the lower slide plate 24 via the telescopic rod 31, so that the lower slide plate 24 overlaps or intersects with the upper slide plate 22. When the flip cover 26 is open, the upper water inlet 23 or the lower water inlet 25 can be removed separately for replacement or maintenance.

[0063] In one possible implementation, open arc-shaped grooves are provided on opposite sides of the upper slide plate 22 and the lower slide plate 24, and the two open arc-shaped grooves enclose each other to form a heat dissipation channel 421 when the upper slide plate 22 and the lower slide plate 24 are overlapping.

[0064] Specifically, the first distribution pipe 41 is fixedly installed on the flip cover 26. When the flip cover 26 is closed, the lower slide plate 24 is driven to overlap with the upper slide plate 22. At this time, the upper slide plate 22 and the lower slide plate 24 form a heat dissipation channel 421, and the first distribution pipe 41 is connected to the heat dissipation channel 421 (see below for details of the connection method). The first distribution pipe 41 is connected to the air inlet 4.

[0065] In this embodiment of the invention, the inert gas in the air inlet 4 will first enter the heat dissipation channel 421 to dissipate heat from the upper slide plate 22 and the lower slide plate 24, protecting the metal parts from high temperature baking, reducing the temperature of the mechanism, and extending its service life.

[0066] In one possible implementation, a through-hole fixing pipe is provided on the refractory filling layer 14 and the outer shell 13, and a through-hole second distribution pipe 42 is provided on the seat brick 21, the upper sliding plate 22, and the lower sliding plate 24.

[0067] Bottom nozzle 44 and top nozzle 45 are connected to the first end of the fixed pipe;

[0068] The first end of the second distribution pipe 42 is connected to the second end of the fixed pipe, and the second end is connected to the air inlet 4.

[0069] Specifically, the second distribution pipe 42 includes a front section 42a, a lower sliding plate section 42b, an upper sliding plate section 42c, and a rear section 42d (e.g., Figures 8 to 10 As shown), the front section 42a is connected to the first distribution pipe 41 and is opened on the flip cover 26. The end section 42d is connected to the third distribution pipe 43. The lower slide plate section 42b is opened on the lower slide plate 24. The upper slide plate section 42c is opened on the upper slide plate 22. The end section 42d is opened on the seat brick 21.

[0070] In this embodiment of the invention, by supplying inert gas into the air inlet 4, the inert gas will first enter the heat dissipation channel 421 to exchange heat with the upper sliding plate 22 and the lower sliding plate 24 for cooling. During this process, the inert gas itself will increase in temperature. Subsequently, when the inert gas is sprayed outward along the top nozzle 45 and the bottom nozzle 44, the temperature will not be too low, thus avoiding excessive temperature difference between the top nozzle 45 and the bottom nozzle 44, which could lead to excessive thermal stress concentration and induce material problems.

[0071] In one possible implementation, the bottom nozzle 44 faces the refractory filling layer 14.

[0072] In this embodiment of the invention, the inert gas output from the bottom nozzle 44 is relatively small during the initial pouring stage. At this time, after being sprayed onto the refractory filling layer 14, the inert gas automatically floats up along the side wall of the furnace lining 12, forming the bottom blowing channel. During this process, the bubbles generated by the inert gas capture the slag near the sleeve 15 and carry impurities to float into the slag layer 61. In the later stage of pouring, the output of the bottom nozzle 44 increases, and the barrier effect of the airflow becomes more pronounced. When the interface between the slag layer 61 and the molten steel 6 is close to the lower end of the sleeve 15, the gas output from the bottom nozzle 44 blows the slag layer 61 further away and preferentially draws in the molten steel 6.

[0073] In one possible implementation, the top nozzle 45 is formed on the inner wall of the port of the sleeve 15.

[0074] In this embodiment of the invention, since the upper end of the sleeve 15 is a bucket-shaped structure, during the middle of the pouring process, the airflow in the top nozzle 45 will flow along the gap between the conical surface of the slag baffle 5 and the upper end of the sleeve 15. This is the top blowing air channel. As the distance between the conical part of the slag baffle 5 and the bucket-shaped structure gradually shortens, the top blowing air channel becomes narrower, and the airflow speed increases. At this time, the air curtain barrier formed by the top blowing air channel will block the scum layer 61 near the upper end.

[0075] In one possible implementation, the upper sliding plate 22 and the lower sliding plate 24 are fixedly provided with blocking blocks 422 for blocking the second distribution pipe 42 (e.g., Figure 14 ).

[0076] Specifically, the blocking block 422 is located on the opposite side of the lower sliding plate section 42b and the upper sliding plate section 42c, but the lower sliding plate section 42b and the heat dissipation channel 421, and the upper sliding plate section 42c and the heat dissipation channel 421 remain unobstructed.

[0077] In this embodiment of the invention, by setting a blocking block 422, the inert gas is blocked when passing through the lower sliding plate section 42b and the upper sliding plate section 42c. The inert gas will be diverted to the heat dissipation channel 421 instead of directly passing through the second distribution pipe 42, thereby prolonging the heat exchange time between the inert gas and the upper sliding plate 22 and the lower sliding plate 24.

[0078] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional steelmaking furnace device, comprising a converter and slag catchers for intercepting slag, wherein the converter comprises an outer shell, a furnace lining, and a furnace opening, characterized in that, It also includes a guiding mechanism, a sliding gate mechanism, and an air blowing mechanism: The guiding mechanism includes a sleeve and an inner tube, and the sleeve has a port for guiding the debris-catching dart; The sliding gate mechanism includes a seat brick, an upper sliding plate, an upper water inlet, a lower sliding plate, a lower water inlet, and a flip cover; The blowing mechanism includes an air inlet, a first distribution pipe, a third distribution pipe, a bottom nozzle, and a top nozzle; The sleeve is coaxially sleeved around the outer periphery of the inner tube and fixedly installed inside the converter by a support rod. The sleeve has an upper port and a lower port, wherein the upper port is used to intercept slag darts, while the lower port is fixed by the support rod. When the slag-blocking dart is blocking the upper end of the casing, the inner wall of the casing and the outer wall of the inner tube form a siphon channel that communicates with the inside of the inner tube. The seat brick is detachably assembled onto the outer shell, and the bottom nozzle and top nozzle are respectively opened on the side and the port of the sleeve to form a bottom blowing air channel and a top blowing air channel with adjustable flow when the slag baffle is attached to the port. The axis of the sleeve and the inner tube is inclined towards the bottom of the converter, and a refractory filling layer is provided inside the converter to support the inner tube and the sleeve. The bottom nozzle faces the refractory filling layer, and the top nozzle is opened on the inner wall of the casing port.

2. The multi-functional steelmaking furnace equipment according to claim 1, characterized in that, The end of the casing forms a bucket-shaped structure with decreasing inner diameter along the direction of movement of the slag catcher.

3. The multi-functional steelmaking furnace equipment according to claim 1, characterized in that, The sliding gate mechanism also includes a support platform and a drive unit, the drive unit including a telescopic rod; The support platform is fixedly mounted on the outer shell and is used to assemble the seat brick; The drive unit is fixedly mounted on the support platform and the telescopic rod is engaged with the lower slide plate to drive the lower slide plate to slide axially.

4. The multi-functional steelmaking furnace equipment according to claim 1, characterized in that, The flip cover is rotatably connected to the side wall of the seat brick, and the flip cover is slidably connected to the lower sliding plate; The inner sides of the upper and lower sliding plates are provided with concave surfaces, and the inner walls of the concave surfaces form a toothed structure that fits the shape of the outer walls of the upper and lower water inlets and has protruding clamping parts.

5. The multi-functional steelmaking furnace equipment according to claim 1, characterized in that, The upper and lower sliding plates are provided with open arc-shaped grooves on opposite sides, and when the upper and lower sliding plates overlap, the two open arc-shaped grooves enclose each other to form a heat dissipation channel.

6. The multi-functional steelmaking furnace equipment according to claim 1, characterized in that, A through-hole fixing pipe is provided on the refractory filling layer and the outer shell, and a through-hole second distribution pipe is provided on the seat brick, the upper sliding plate and the lower sliding plate; The bottom nozzle and the top nozzle are connected to the first end of the fixed pipe; The first end of the second distribution pipe is connected to the second end of the fixed pipe, and the second end is connected to the air inlet.

7. The multi-functional steelmaking furnace equipment according to claim 6, characterized in that, The upper and lower sliding plates are fixedly provided with blocking blocks for blocking the second distribution pipe on opposite sides.

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