Furnace mouth structure of converter and converter

Abstract

The utility model relates to the technical field of converter steelmaking, in particular to a converter mouth structure and a converter. The furnace mouth structure comprises a furnace mouth body, the furnace mouth body comprises a furnace mouth surrounding edge, a furnace mouth is defined by the furnace mouth surrounding edge, and the furnace mouth is provided with a steel tapping side; the stopping piece is arranged on the furnace mouth body, the stopping piece is provided with a first connecting part and a stopping part connected with the first connecting part, and the stopping part extends in the radial direction of the furnace mouth; wherein the first connecting part is connected with the furnace mouth surrounding edge, and the stopping piece is located on the steel tapping side so as to shield part of the furnace mouth. According to the furnace mouth structure, the probability that red slag flows out of the furnace mouth can be reduced, and therefore the probability that equipment below the furnace mouth is damaged is reduced.

Description

Technical Field

[0001] This application relates to the field of converter steelmaking technology, and more particularly to a converter mouth structure and a converter. Background Technology

[0002] A converter is a steelmaking device that uses oxidizing agents such as oxygen to react with impurities in molten iron, thus purifying it. The converter rotates to ensure uniform mixing of molten iron and slag, improving smelting efficiency. Converter steelmaking offers advantages such as high production efficiency, low cost, and strong adaptability, and is widely used in the steel industry.

[0003] In related technologies, a converter typically consists of a furnace body and a furnace opening, with the furnace opening used to tap the steel. During the process of tilting the converter to tap steel, the position of the furnace opening gradually decreases as the furnace body tilts, so that the molten steel inside the furnace can be smoothly poured out.

[0004] However, converters typically contain red slag, which is steel slag in a high-temperature molten state. When the furnace opening drops below the liquid red slag level line inside the converter, the red slag can easily flow out of the furnace opening, potentially damaging equipment such as the tapping car below the converter. Utility Model Content

[0005] This application provides a converter opening structure and a converter to solve the problem that red slag easily flows out of the opening, which can easily damage equipment such as the tapping car below the converter.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] On one hand, this application provides a furnace mouth structure for a converter, the furnace mouth structure including: a furnace mouth body, the furnace mouth body including a furnace mouth rim, the furnace mouth rim surrounding to form a furnace mouth, the furnace mouth having a tapping side; a stop member disposed on the furnace mouth body, the stop member having a first connecting portion and a stop portion connected to the first connecting portion, the stop portion extending along the radial direction of the furnace mouth; wherein, the first connecting portion is connected to the furnace mouth rim, and the stop member is located on the tapping side to block part of the furnace mouth.

[0008] In one possible implementation, the furnace opening structure provided in this application has a second connecting portion along its circumferential direction around the furnace opening edge, and the first connecting portion is fitted and connected to the second connecting portion.

[0009] In one possible implementation, the furnace opening structure provided in this application has a stop edge on the side of the stop portion away from the first connecting portion. The stop edge extends along a first direction, and both ends of the stop edge in the first direction are connected to the furnace opening perimeter.

[0010] In one possible implementation, the furnace opening structure provided in this application has a recess on the side of the stop portion away from the first connecting portion, and the recess is recessed in the direction away from the stop portion.

[0011] In one possible implementation, the furnace opening structure provided in this application has a stop portion with an orthogonal projection area of ​​S1 in the axial direction of the furnace opening, and an area of ​​S2 in the furnace opening, wherein S1 = (0.03~0.13)*S2.

[0012] In one possible implementation, the furnace opening structure provided in this application has a first radius, the size of which is R1, and the stop portion has a maximum radial distance along the radial direction, the size of which is R2, wherein R2 = (0.1~0.4)*R1.

[0013] In one possible implementation, the furnace opening structure provided in this application has a stop member with a thickness of 20mm-150mm in the axial direction of the furnace opening body.

[0014] In one possible implementation, the furnace opening structure provided in this application further includes a refractory layer disposed on the stop member.

[0015] In one possible implementation, the furnace opening structure provided in this application has the first connecting part and the stop part as an integrally formed part.

[0016] On the other hand, this application provides a converter, including a converter body and the aforementioned furnace opening structure, wherein the furnace opening structure is installed on the converter body.

[0017] The converter opening structure and converter provided in this application include an opening body and a stop. The opening body includes an opening rim and an opening formed by the opening rim. The opening has a tapping side to allow molten steel to be smoothly poured out through the tapping side. The stop includes a first connecting part and a stop part. The stop part extends radially along the opening. The first connecting part is matched and connected to the side of the opening rim near the tapping side, so that the stop is located on the tapping side. By extending radially along the opening, the stop part partially blocks the opening. Therefore, when the converter tilts to tap steel, the probability of red slag flowing out of the opening can be reduced, thereby reducing the probability of damage to the equipment below the opening. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the furnace opening structure provided in the embodiments of this application. Figure 1 ;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the central furnace opening body;

[0021] Figure 3 A schematic diagram of the furnace opening structure provided in the embodiments of this application. Figure 2 ;

[0022] Figure 4 A schematic diagram of the furnace opening structure provided in the embodiments of this application. Figure 3 ;

[0023] Figure 5 A schematic diagram of the furnace opening structure provided in the embodiments of this application. Figure 4 ;

[0024] Figure 6 A side view of the stop provided in an embodiment of this application;

[0025] Figure 7 for Figure 1 Another perspective illustration.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-furnace body;

[0028] 110 - Furnace opening rim; 111 - Second connecting part;

[0029] 120 - Furnace opening; 121 - Tapping side;

[0030] 200-stop component;

[0031] 210 - First connecting part;

[0032] 220 - Stop portion; 221 - Stop edge; 222 - Recess;

[0033] X - radial direction; Y - axial direction.

[0034] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the preferred embodiments of this application will be described in more detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0037] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] A converter is a steelmaking device that uses oxidizing agents such as oxygen to react with impurities in molten iron, thus purifying it. The converter rotates to ensure uniform mixing of molten iron and slag, improving smelting efficiency. Converter steelmaking offers advantages such as high production efficiency, low cost, and strong adaptability, and is widely used in the steel industry.

[0040] In related technologies, a converter typically consists of a furnace body and a furnace opening, with the opening used for tapping steel. During the tapping process, the position of the furnace opening gradually decreases as the furnace body tilts, allowing the molten steel inside to be poured out smoothly. However, converters usually contain red slag, i.e., steel slag in a high-temperature molten state. When the furnace opening drops below the level of the molten red slag inside the converter, the red slag can easily flow out of the opening, potentially damaging equipment such as the tapping car below the converter.

[0041] In view of this, the converter mouth structure and converter provided in this application include a mouth body and a stop member. The mouth body includes a mouth rim and a mouth formed by the mouth rim. The mouth has a tapping side so that molten steel can be smoothly poured out through the tapping side of the mouth. The stop member includes a first connecting part and a stop part. The stop part extends radially along the mouth. The first connecting part is matched and connected to the side of the mouth rim near the tapping side so that the stop member is located on the tapping side. By extending radially along the mouth, the stop part partially blocks the mouth. Therefore, when the converter tilts to tap steel, the probability of red slag flowing out of the mouth can be reduced, thereby reducing the probability of damage to the equipment below the mouth.

[0042] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0043] See Figures 1 to 7 This application provides a furnace opening structure for a converter, comprising: a furnace opening body 100, the furnace opening body 100 including a furnace opening perimeter 110, the furnace opening perimeter 110 surrounding to form a furnace opening 120, the furnace opening 120 having a tapping side 121; and a stop member 200 disposed on the furnace opening body 100, the stop member 200 having a first connecting portion 210 and a stop portion 220 connected to the first connecting portion 210, the stop portion 220 extending along the radial direction X of the furnace opening 120; wherein, the first connecting portion 210 is connected to the furnace opening perimeter 110, and the stop member 200 is located on the tapping side 121 to partially block the furnace opening 120.

[0044] In practice, the furnace opening shroud 110 is made of steel plate through welding or casting. The furnace opening shroud 110 can be a single-piece molding or a composite structure. The furnace opening shroud 110 can be welded to the converter shell. The furnace opening shroud 110 forms the furnace opening 120 for the outflow of molten steel and other liquid metals. It is understood that the furnace opening shroud 110 can be annular, thus allowing the furnace opening 120 formed by the shroud 110 to be circular.

[0045] It should be noted that the furnace opening 120 has a tapping side 121, which can be understood as the bottom or near the bottom of the furnace opening 120 in the direction of gravity, so that molten steel can flow out under the action of gravity. Specifically, when smelting is completed and the converter begins to tilt to tap steel, the position of the furnace opening 120 will gradually decrease as the furnace body tilts, and the molten steel will begin to flow out along the tapping side 121 of the furnace opening 120.

[0046] To enhance the functionality and safety of the furnace opening 120 structure, a stop 200 is provided on the furnace opening body 100. The stop 200 may include a first connecting portion 210 and a stop portion 220 connected to the first connecting portion 210. The function of the first connecting portion 210 is to securely install the stop 200 on the furnace opening perimeter 110, ensuring the stability and reliability of the stop 200 in the furnace opening 120 structure.

[0047] For example, the furnace opening 120 formed by the furnace opening rim 110 is circular, and the curvature of the first connecting part 210 can be set to match the furnace opening rim 110 in order to facilitate connection with the furnace opening rim 110.

[0048] The stop part 220 is configured to extend in the radial direction X along the furnace opening 120. The function of the stop part 220 is to block part of the furnace opening 120 to prevent high-temperature substances such as liquid red slag from flowing out during the process of tilting the converter to tap steel, which could damage the equipment below the furnace opening 120.

[0049] Alternatively, the stop portion 220 may be a flat plate stop portion 220.

[0050] It should be noted that the first connecting part 210 is matched and connected to the side of the furnace opening circumference 110 near the tapping side 121, so that the stop 200 is set on the tapping side 121 of the furnace opening 120. When the converter tilts to tap steel, the position of the furnace opening 120 will gradually decrease with the tilting of the furnace body, and molten steel will begin to flow out along the tapping side 121 of the furnace opening 120. Through the shielding effect of the stop 200, the risk of hot substances such as red slag spilling out can be effectively reduced, thereby protecting the equipment and personnel below the furnace opening 120 structure. At the same time, the setting of the stop 200 also facilitates the maintenance and cleaning of the furnace opening 120, improving the operating efficiency and safety of the converter.

[0051] See Figure 1 and Figure 2 In some embodiments, the furnace opening rim 110 has a second connecting portion 111 along its circumference, and the first connecting portion 210 is fitted and connected to the second connecting portion 111.

[0052] Understandably, the furnace opening circumference 110 is provided with a second connecting portion 111 along its circumferential edge, providing a more stable interface for the connection between the furnace opening circumference 110 and the first connecting portion 210, thus enhancing the connection reliability of the furnace opening circumference 110. Furthermore, the second connecting portion 111 is positioned close to the tapping side 121 so that after the first connecting portion 210 and the second connecting portion 111 are connected, the stop member 200 can be located on the tapping side 121, thereby reducing the probability of red slag flowing out of the furnace opening 120.

[0053] In a specific implementation, the second connecting part 111 can be processed at the edge of the furnace opening rim 110 to form a connecting surface that matches the first connecting part 210. The connecting surface can be flat, curved, or of other shapes. The first connecting part 210 can also be a connecting surface. With this configuration, the first connecting part 210 and the second connecting part 111 can fit tightly together surface-to-surface and then form a stable and reliable connection through welding. This configuration allows for a seamless connection between the first connecting part 210 and the second connecting part 111, thereby preventing material leakage between them.

[0054] See Figure 1 In some embodiments, the stop portion 220 has a stop edge 221 on the side away from the first connecting portion 210. The stop edge 221 extends along a first direction, and both ends of the stop edge 221 in the first direction are connected to the furnace opening rim 110.

[0055] The first direction can be understood as the horizontal direction.

[0056] It should be noted that this design enhances the structural stability of the stop part 220, enabling it to effectively block the flow of steel when the converter tilts to tap, thereby improving the safety and reliability of the furnace opening 120 structure, reducing the probability of red slag flowing out of the furnace opening 120, and thus reducing the probability of damage to the equipment below the furnace opening 120.

[0057] See Figures 3 to 5 In some embodiments, a recess 222 is provided on the side of the stop portion 220 away from the first connecting portion 210, and the recess 222 is recessed in the direction away from the stop edge 221.

[0058] Understandably, the side of the stop portion 220 away from the first connecting portion 210, i.e., the stop edge 221, can be configured to be parallel to the horizontal direction. Alternatively, the side of the stop portion 220 away from the first connecting portion 210 can also have a recess 222. The recess 222 is positioned away from the stop edge 221, meaning it is recessed in the direction opposite to the extending direction of the stop portion 220. This configuration ensures the structural strength of the stop portion 220 while saving on manufacturing materials, thereby reducing production costs.

[0059] In addition, by setting the recess 222, the smoothness of molten steel flowing out of the furnace opening 120 can be improved while ensuring the blocking effect of the stop part 220 on the red slag.

[0060] Alternatively, the recess 222 can be configured as an arcuate surface formed on the stop edge 221, see [reference]. Figure 3 and Figure 4Its curvature can be the same as the curvature of the furnace opening rim 110, or it can be set to be smaller than the curvature of the furnace opening rim 110. See [link / reference]. Figure 5 The recess 222 can also be configured as two inclined surfaces opened at a predetermined angle on the stop edge 221, which is not limited here.

[0061] In some embodiments, the orthogonal projection area of ​​the stop portion 220 on the axial direction Y of the furnace opening 120 is S1, and the area of ​​the furnace opening 120 is S2, wherein S1 = (0.03~0.13)*S2.

[0062] It should be noted that the area of ​​S1 can be in a certain proportion to the area of ​​S2, with this proportion ranging from 0.03*S2 to 0.13*S2. That is, the projected area S1 of the stop 220 can be any value between 3% and 13% of the area S2 of the furnace opening 120. For example, S1 = 0.05*S2, S1 = 0.11*S2, etc. This setting ensures that the stop 220 can effectively block the red slag, while avoiding excessive obstruction of the furnace opening 120 due to an excessively large S1 area, which would reduce the flow capacity of molten steel through the furnace opening 120.

[0063] See Figure 1 , Figures 3 to 5 In some embodiments, the furnace opening has a first radius, the size of which is R1, and the stop portion 220 has a maximum radial distance along the radial direction X, the size of which is R2, wherein R2 = (0.1~0.4)*R1.

[0064] Optionally, the maximum radial distance can be set to R2, which can be any value between 0.1*R1 and 0.4*R1. For example, the maximum radial distance R2 can be 0.2*R1, 0.3*R1, etc. This setting takes into account both the sufficient blocking area required by the stop part 220 to effectively prevent the unexpected flow of red slag at the furnace opening 120, and the effective utilization of the space at the furnace opening 120, avoiding excessive obstruction of the furnace opening 120 due to an excessively large size of the stop part 220. If the maximum radial distance R2 is less than 0.1*R1, for example, if the maximum radial distance R2 is set to 0.06*R1, the blocking effect of the stop part 220 may decrease, thereby increasing the probability of red slag flowing out of the furnace opening 120. If the maximum radial distance R2 is greater than 0.4*R1, for example, if the maximum radial distance R2 is set to 0.5*R2, it may cause the stop part 220 to excessively block the furnace opening 120, thereby causing the flow of molten steel through the furnace opening 120 to become poor during the converter tilting and tapping process.

[0065] See Figure 6In some embodiments, the thickness of the stop 200 in the axial direction Y of the furnace opening body 100 is 20mm-150mm.

[0066] Understandably, the thickness of the stop 200 in the axial direction Y of the furnace opening body 100 can be set to d, where d can be any value between 20mm and 150mm. This setting ensures that the stop 200 has sufficient strength and rigidity to withstand various pressures and impacts that may occur at the furnace opening 120, thereby effectively reducing the probability of red slag flowing out of the furnace opening 120.

[0067] In addition, the thickness of the stop member 200 in the axial direction Y of the furnace opening body 100 can be the same as the thickness of the furnace opening rim 110 in the axial direction Y. This arrangement can improve the connection strength between the first connecting part 210 and the second connecting part 111, thereby improving the structural stability of the stop member 200.

[0068] In some embodiments, the furnace opening 120 structure further includes a refractory layer disposed on the stop member 200.

[0069] Specifically, a refractory layer is applied to the surface of the stop 200 to provide additional thermal protection and wear resistance. Since the furnace opening 120 area is frequently subjected to the scouring of high-temperature furnace gases and the friction of materials, the refractory layer extends the service life of the stop 200, ensuring the long-term stable operation of the furnace opening 120 structure.

[0070] In some embodiments, the first connecting portion 210 and the stop portion 220 are integrally formed parts.

[0071] Understandably, designing the first connecting part 210 and the stop part 220 as a single molded component not only simplifies the manufacturing process of the furnace opening 120 structure and reduces production costs, but also improves the overall integrity and stability of the furnace opening 120 structure. The single-molded design avoids gaps between the first connecting part 210 and the stop part 220, thereby preventing structural failure or performance degradation due to poor connection.

[0072] In addition, this design can prevent leakage from the stop 200 and improve the safety of the stop 200.

[0073] Based on the above embodiments, this application provides a converter, including a converter body and a furnace opening structure provided in any of the above embodiments, wherein the furnace opening structure is installed on the converter body.

[0074] The furnace opening structure has been described in detail in the above embodiments and will not be repeated here. By adopting the furnace opening structure of this application, the risk of red slag outflow can be reduced, the safety of converter operation can be improved, the production environment under the converter can be improved, the risk of converter accidents under the converter can be reduced, and the service life of converter equipment under the converter can be increased.

[0075] It is understood that the furnace opening structure provided in any of the above embodiments can be designed and manufactured simultaneously during converter production, or the existing converter furnace opening structure can be modified accordingly.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A converter opening structure, characterized in that, The furnace opening structure includes: The furnace opening body (100) includes a furnace opening perimeter (110), which surrounds and forms a furnace opening (120), and the furnace opening (120) has a steel tapping side (121). A stop (200) is disposed on the furnace opening body (100). The stop (200) has a first connecting portion (210) and a stop portion (220) connected to the first connecting portion (210). The stop portion (220) extends along the radial direction (X) of the furnace opening (120). The first connecting part (210) is connected to the furnace opening perimeter (110), and the stop (200) is located on the tapping side (121) to partially block the furnace opening (120).

2. The furnace opening structure according to claim 1, characterized in that, The furnace opening rim (110) has a second connecting part (111) along its circumference, and the first connecting part (210) and the second connecting part (111) are fitted together.

3. The furnace opening structure according to claim 1, characterized in that, The stop portion (220) has a stop edge (221) on the side away from the first connecting portion (210). The stop edge (221) extends along a first direction, and both ends of the stop edge (221) in the first direction are connected to the furnace opening rim (110).

4. The furnace opening structure according to claim 3, characterized in that, The stop portion (220) has a recess (222) on the side away from the first connecting portion (210), and the recess (222) is recessed in the direction away from the stop edge (221).

5. The furnace opening structure according to any one of claims 1 to 4, characterized in that, The area of ​​the stop (220) projected onto the axial direction (Y) of the furnace opening (120) is S1, and the area of ​​the furnace opening (120) is S2, wherein S1 = (0.03~0.13)*S2.

6. The furnace opening structure according to claim 5, characterized in that, The furnace opening (120) has a first radius, the size of which is R1, and the stop (220) has a maximum radial distance along the radial direction (X), the size of which is R2, wherein R2 = (0.1~0.4)*R1.

7. The furnace opening structure according to any one of claims 1 to 4, characterized in that, The thickness of the stop (200) in the axial direction (Y) of the furnace mouth body (100) is 20mm-150mm.

8. The furnace opening structure according to any one of claims 1 to 4, characterized in that, The furnace opening (120) structure also includes a refractory layer, which is disposed on the stop (200).

9. The furnace opening structure according to any one of claims 1 to 4, characterized in that, The first connecting part (210) and the stop part (220) are integrally formed parts.

10. A converter, characterized in that, It includes a converter body and a furnace opening structure as described in any one of claims 1 to 9, wherein the furnace opening structure is installed on the converter body.

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