A continuous casting tundish sealing device and a continuous casting tundish

Abstract

This utility model discloses a sealing device for a continuous casting tundish and a continuous casting tundish, applied in the field of steelmaking technology. The sealing device includes a long nozzle cover plate covering the long nozzle of the tundish cover. The long nozzle cover plate includes a first cover plate and a second cover plate, both hinged to the tundish cover. Corresponding positions on the first and second cover plates are provided with nozzle clearance portions, which can be rotated relative to the tundish cover to open and close the nozzle clearance portions. The sealing device for a continuous casting tundish provided by this utility model can close the nozzle clearance portions on the first and second cover plates by rotating them. The nozzle clearance portions provide clearance space for molten steel pouring, while other positions on the first and second cover plates can cover the long nozzle, effectively preventing air from entering the continuous casting tundish, preventing secondary oxidation of the molten steel, and improving the quality of continuous casting.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking technology, and in particular to a sealing device for a continuous casting tundish and a continuous casting tundish. Background Technology

[0002] The total oxygen index in the tundish is an effective key indicator for evaluating the purity of molten steel. Currently, the control level of the total oxygen index in the tundish is poor. Through research and analysis of the opening process of the long nozzle, the opening device includes the upper nozzle of the ladle, the lower nozzle of the ladle, the long nozzle, and the sliding plate mechanism. When the sliding plate mechanism is at its maximum opening, it has the greatest impact on the disturbance and impact of the molten steel in the impact zone. In particular, in the open opening method, it is easy to cause secondary oxidation of the molten steel.

[0003] In related technologies, argon gas is generally used to purge the air from the tundish to reduce contact between molten steel and air. However, real-time monitoring with a gas analyzer shows that the oxygen content remains high, wasting energy and affecting the purity of the molten steel, leading to inclusions and the generation of substandard products. Furthermore, the baking and sampling holes in the tundish are covered with asbestos, resulting in poor insulation, and the long nozzles are not sealed, leaving the casting process open. All these factors affect the purging of air from the tundish with argon gas, thus contributing to the high oxygen content.

[0004] Therefore, how to solve the problem of secondary oxidation of molten steel in the continuous casting tundish is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a sealing device and a continuous casting tundish, which can improve the sealing effect and achieve the purpose of isolating air and preventing secondary oxidation of molten steel.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing device for a continuous casting tundish is disposed on the tundish cover; it includes a long nozzle cover plate covering the long nozzle of the tundish cover; the long nozzle cover plate includes a first cover plate and a second cover plate, both of which are hinged to the tundish cover, and the first cover plate and the second cover plate are provided with nozzle clearance portions at corresponding positions, and the first cover plate and the second cover plate are rotatable relative to the tundish cover to open and close the nozzle clearance portions.

[0008] On the other hand, the first side of both the first cover plate and the second cover plate is hinged to the cover, and the second side of both is fixedly provided with a support and movement assembly. The support and movement assembly is used to drive the corresponding first cover plate or the second cover plate to rotate relative to the cover; and / or, the second side of the first cover plate and the second cover plate is also provided with a sprue lifting ring.

[0009] On the other hand, the supporting moving assembly includes a supporting shaft, a bearing, and a driving ring. The supporting shaft is fixed on the corresponding first cover plate or second cover plate, the bearing is sleeved on the supporting shaft, and the driving ring is located at the end of the supporting shaft away from the first cover plate or second cover plate.

[0010] On the other hand, the support shaft is also fixed with a positioning ring, and the bearing is mounted on the positioning ring. The bearing and the positioning ring are positioned along the axial direction of the support shaft.

[0011] On the other hand, both the first cover plate and the second cover plate include a frame and a first plate body. The frame surrounds the periphery of the first plate body, and a connecting edge extends from one side of the frame. The connecting edge is hinged to the edge of the cover.

[0012] On the other hand, the first plate includes a first metal shell and a first refractory material filling layer located inside the first metal shell. The first metal shell is also provided with a plurality of first fasteners, which penetrate the first refractory material filling layer and the first metal shell.

[0013] On the other hand, the first fastener is a steel bar, and the first fastener has a V-shaped structure, with the opening of the first fastener facing the cover.

[0014] On the other hand, it also includes a baking hole cover plate, which is placed on the baking hole of the cover and covers the baking hole.

[0015] On the other hand, the baking hole cover plate is provided with a baking lifting ring on the side opposite to the cover plate. The baking hole cover plate includes a second metal shell and a second refractory material filling layer located inside the second metal shell. The second metal shell is also provided with a number of second fasteners, which penetrate through the second refractory material filling layer and the second metal shell.

[0016] This utility model also provides a continuous casting tundish, including the continuous casting tundish sealing device described in any one of the above-mentioned claims.

[0017] The continuous casting tundish sealing device provided by this utility model is disposed on the ladle cover of the continuous casting tundish; it includes a long nozzle cover plate, which covers the long nozzle of the ladle cover; the long nozzle cover plate includes a first cover plate and a second cover plate, both of which are hinged to the ladle cover. Corresponding positions of the first cover plate and the second cover plate are provided with nozzle clearance portions, which can be rotated relative to the ladle cover to open and close the nozzle clearance portions. The continuous casting tundish sealing device provided by this utility model, by utilizing the arrangement of the first cover plate and the second cover plate, allows the nozzle clearance portions on the first cover plate and the second cover plate to be closed by rotating them. The nozzle clearance portions provide clearance space for molten steel pouring, while other positions of the first cover plate and the second cover plate can cover the long nozzle, effectively preventing air from entering the continuous casting tundish, preventing secondary oxidation of the molten steel, and improving the continuous casting processing quality.

[0018] The continuous casting tundish provided by this utility model is equipped with the above-mentioned continuous casting tundish sealing device. Since the continuous casting tundish sealing device has the above-mentioned technical effects, the continuous casting tundish equipped with the continuous casting tundish sealing device should also have the corresponding technical effects. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a specific embodiment of the long nozzle cover plate in the continuous casting tundish sealing device provided by this utility model.

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the first cover plate in the long water inlet cover plate shown;

[0022] Figure 3 This is a cross-sectional view of the baking hole cover plate in the continuous casting tundish sealing device provided by this utility model;

[0023] Figure 4 This is a bottom view of the baking hole cover plate in the continuous casting tundish sealing device provided by this utility model.

[0024] Figure label:

[0025] Baking hole cover plate 100; second plate 101; baking lifting ring 102; second fastener 103; long sprue cover plate 200; frame 210; connecting edge 211; first support edge 212; second support edge 213; third support edge 214; fourth support edge 215; fifth support edge 216; sixth support edge 217; hinge 218; first plate 220; first fastener 221; support moving assembly 230; positioning ring 231; support shaft 232; drive ring 233; bearing 234. Detailed Implementation

[0026] The core of this invention is to provide a sealing device for a continuous casting tundish and a continuous casting tundish, which can effectively reduce the oxygen content in the continuous casting tundish and reduce the risk of secondary oxidation of molten steel.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of a specific embodiment of the long nozzle cover plate in the continuous casting tundish sealing device provided by this utility model. Figure 2 for Figure 1 A schematic diagram of the structure of the first cover plate in the long water inlet cover plate shown; Figure 3 This is a cross-sectional view of the baking hole cover plate in the continuous casting tundish sealing device provided by this utility model; Figure 4 This is a bottom view of the baking hole cover plate in the continuous casting tundish sealing device provided by this utility model.

[0030] In this embodiment, a continuous casting tundish sealing device is disposed on the tundish cover of the continuous casting tundish; the continuous casting tundish sealing device includes a long nozzle cover plate 200, which covers the long nozzle of the tundish cover; the long nozzle cover plate 200 includes a first cover plate 200-1 and a second cover plate 200-2, both of which are hinged to the tundish cover, and nozzle clearance portions 200-3 are provided at corresponding positions of the first cover plate 200-1 and the second cover plate 200-2, which can rotate relative to the tundish cover to open and close the nozzle clearance portions 200-3.

[0031] Specifically, the continuous casting tundish has a long nozzle on its cover. The long nozzle is a pouring hole and belongs to the casting area. It has a relatively large diameter. The long nozzle cover plate 200 is used to cover and shield the large long nozzle, thus sealing the continuous casting tundish. The first cover plate 200-1 and the second cover plate 200-2 have the same structure and are symmetrically distributed. The nozzle clearance part 200-3 is a notch on the first cover plate 200-1 and the second cover plate 200-2. When the first cover plate 200-1 and the second cover plate 200-2 are closed, that is, when the first cover plate 200-1 and the second cover plate 200-2 are close to each other, the nozzle clearance part 200-3 on the first cover plate 200-1 and the second cover plate 200-2 closes to form a complete hollow part, which facilitates the casting of molten steel. Since the size of the nozzle clearance part 200-3 is relatively small, it can reduce the amount of air entering the continuous casting tundish.

[0032] This continuous casting tundish sealing device, by utilizing the arrangement of the first cover plate 200-1 and the second cover plate 200-2, can close the nozzle clearance portion 200-3 on the first cover plate 200-1 and the second cover plate 200-2 by rotating the first cover plate 200-1 and the second cover plate 200-2. The nozzle clearance portion 200-3 can provide clearance space for molten steel casting. At the same time, other positions of the first cover plate 200-1 and the second cover plate 200-2 can cover the long nozzle, effectively preventing air from entering the continuous casting tundish, preventing secondary oxidation of molten steel, and improving the continuous casting processing quality.

[0033] In some embodiments, the first side of both the first cover plate 200-1 and the second cover plate 200-2 is hinged to the cover, and the second side is fixedly provided with a support and movement assembly 230. The support and movement assembly 230 is used to drive the corresponding first cover plate 200-1 or second cover plate 200-2 to rotate relative to the cover. Specifically, the support and movement assembly 230 can be moved by external equipment, such as a hook, to move the first cover plate 200-1 or the second cover plate 200-2 closer to or away from the cover, thereby blocking the long sprue, or opening the long sprue after the corresponding process is completed. The movement of the first cover plate 200-1 and the second cover plate 200-2 can be carried out by separate hooks. The first cover plate 200-1 and the second cover plate 200-2 can move synchronously or independently.

[0034] In some embodiments, the second side of the first cover plate 200-1 and the second cover plate 200-2 is also provided with a sprue lifting ring. When installing the first cover plate 200-1 and the second cover plate 200-2, the sprue lifting ring can facilitate the lifting.

[0035] In some embodiments, the supporting movable assembly 230 includes a supporting shaft 232, a bearing 234, and a drive ring 233. The supporting shaft 232 is fixed on the corresponding first cover plate 200-1 or second cover plate 200-2, the bearing 234 is sleeved on the supporting shaft 232, and the drive ring 233 is located at one end of the supporting shaft 232 away from the first cover plate 200-1 or second cover plate 200-2. Specifically, the bearing 234 can be a deep groove ball bearing 234. Through the setting of the bearing 234, the drive ring 233 is used to move the shaft. When the first cover plate 200-1 or the second cover plate 200-2 moves, the bearing 234 can act as a roller, effectively supporting the first cover plate 200-1 or the second cover plate 200-2, saving time and effort. The drive ring 233 can facilitate the connection of external equipment. Of course, external equipment can also be directly connected to the support shaft 232, which can provide force to the support shaft 232 to drive the first cover plate 200-1 or the second cover plate 200-2 to open or close.

[0036] In some embodiments, the support shaft 232 is further fixed with a positioning ring 231, and a bearing 234 is mounted on the positioning ring 231. The bearing 234 and the positioning ring 231 are axially limited along the support shaft 232. A groove may be provided on the positioning ring 231, and the bearing 234 may be located in the groove to facilitate axial limitation of the bearing 234. The outer periphery of the bearing 234 should be connected to the cover. There may be a certain gap between the first cover plate 200-1 and the second cover plate 200-2 and the cover. That is, during the opening or closing of the first cover plate 200-1 and the second cover plate 200-2, the first cover plate 200-1 and the second cover plate 200-2 are not connected to the cover. Only the two ends of the first cover plate 200-1 or the second cover plate 200-2, i.e., the hinge 218 and the bearing 234, are connected to the cover to reduce friction.

[0037] In some embodiments, both the first cover plate 200-1 and the second cover plate 200-2 include a frame 210 and a first plate body 220. The frame 210 surrounds the periphery of the first plate body 220, and a connecting edge 211 extends from one side of the frame 210, which is hinged to the edge of the cover. Specifically, the frame 210 includes the connecting edge 211 and a first support edge 212, a second support edge 213, a third support edge 214, a fourth support edge 215, a fifth support edge 216, and a sixth support edge 217 arranged around the first plate body 220. One end of the first support edge 212 extends to connect with the connecting edge 211. The extension length of the support edge 212 is determined according to the size of the cover. The connecting edge 211 is perpendicular to the first support edge 212. The first support edge 212, the second support edge 213, the third support edge 214, the fourth support edge 215, the fifth support edge 216 and the sixth support edge 217 are arranged vertically in sequence. The sprue clearance part 200-3 is located between the fourth support edge 215 and the fifth support edge 216. The hinge point 218 between the first cover plate 200-1 and the cover is different from the hinge point 218 between the second cover plate 200-2 and the cover, so as to avoid interference between the first cover plate 200-1 and the second cover plate 200-2 during rotation.

[0038] In some embodiments, the first plate 220 includes a first metal shell and a first refractory material filling layer located inside the first metal shell. The first metal shell is also provided with a plurality of first fasteners 221, which penetrate the first refractory material filling layer and the first metal shell. Specifically, the first metal shell can be welded from steel plates. The first refractory material filling layer fills the first metal shell, which can improve the service life. The first fasteners 221 can be bent from round steel. By setting the first fasteners 221, the connection strength between the first refractory material filling layer and the first metal shell can be improved.

[0039] In some embodiments, the first fastener 221 is a steel bar, and the first fastener 221 has a V-shaped structure with the opening of the first fastener 221 facing the cover. The V-shaped structure is convenient for processing and arrangement, has a stable position, and has a good fixing effect on the first refractory material filling layer.

[0040] In some embodiments, a baking hole cover plate 100 is also included, which is placed on and covers the baking hole of the ladle cover. Specifically, the ladle cover of the continuous casting tundish is also provided with a baking hole, which is small in size and mainly serves to bake the tundish during the baking process; the baking hole cover plate 100 further improves the sealing effect of the continuous casting tundish by covering the baking hole.

[0041] In some embodiments, the baking hole cover 100 includes a second plate 101 and a baking lifting ring 102 disposed on the side of the second plate 101 opposite to the cover. The baking lifting ring 102 can be lifted by external equipment to facilitate the installation of the baking hole cover 100. The baking hole cover 100 includes a second metal shell and a second refractory material filling layer located inside the second metal shell. A plurality of second fasteners 103 are also provided inside the second metal shell, and the second fasteners 103 penetrate through the second refractory material filling layer and the second metal shell. Similarly, the second metal shell can be welded from steel plates, and the second refractory material filling layer fills the second metal shell, which can improve the service life. The second fasteners 103 can be bent from round steel. The setting of the second fasteners 103 can improve the connection strength between the second refractory material filling layer and the second metal shell.

[0042] In some embodiments, the second fastener 103 is a steel bar, and the second fastener 103 has a V-shaped structure with the opening of the second fastener 103 facing the cover. The V-shaped structure is convenient for processing and arrangement, has a stable position, and has a good fixing effect on the first refractory material filling layer.

[0043] Furthermore, in one specific embodiment, the baking hole cover plate 100 is made of circular steel plate welded together, and the interior is cast with refractory material casting material; the long sprue cover plate 200 is a movable cover plate, which is divided into left and right parts, namely the first cover plate 200-1 and the second cover plate 200-2. The front ends of the first cover plate 200-1 and the second cover plate 200-2 are designed with movable shafts to be hinged to the cover. The interior of the first cover plate 200-1 and the second cover plate 200-2 is a lightweight refractory material filling layer, and the outer shell is a welded steel plate shell.

[0044] This continuous casting tundish sealing device can effectively prevent air from entering the continuous casting tundish, has a good sealing effect, reduces secondary oxidation of molten steel, improves product quality, and is easy to operate, simple to manufacture, and low in cost.

[0045] In addition to the aforementioned continuous casting tundish sealing device, this utility model also provides a continuous casting tundish that includes the aforementioned continuous casting tundish sealing device. For the structure of other parts of the continuous casting tundish, please refer to relevant technologies, which will not be described in detail here.

[0046] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0047] The continuous casting tundish sealing device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A sealing device for a continuous casting tundish, disposed on the tundish cover of a continuous casting tundish; characterized in that, The device includes a long sprue cover (200) that covers the long sprue of the cover. The long sprue cover (200) includes a first cover (200-1) and a second cover (200-2). Both the first cover (200-1) and the second cover (200-2) are hinged to the cover. The first cover (200-1) and the second cover (200-2) are provided with sprue clearance portions (200-3) at corresponding positions. The first cover (200-1) and the second cover (200-2) can rotate relative to the cover to open and close the sprue clearance portions (200-3).

2. The continuous casting tundish sealing device according to claim 1, characterized in that, The first cover plate (200-1) and the second cover plate (200-2) are both hinged to the cover on their first sides, and a support moving component (230) is fixedly provided on their second sides. The support moving component (230) is used to drive the corresponding first cover plate (200-1) or second cover plate (200-2) to rotate relative to the cover; and / or, the second sides of the first cover plate (200-1) and the second cover plate (200-2) are also provided with a sprue lifting ring.

3. The continuous casting tundish sealing device according to claim 2, characterized in that, The supporting moving assembly (230) includes a supporting shaft (232), a bearing (234), and a driving ring (233). The supporting shaft (232) is fixed on the corresponding first cover plate (200-1) or second cover plate (200-2). The bearing (234) is sleeved on the supporting shaft (232). The driving ring (233) is located at one end of the supporting shaft (232) away from the first cover plate (200-1) or the second cover plate (200-2).

4. The continuous casting tundish sealing device according to claim 3, characterized in that, The support shaft (232) is also fixed with a positioning ring (231), and the bearing (234) is mounted on the positioning ring (231). The bearing (234) and the positioning ring (231) are axially limited along the support shaft (232).

5. The continuous casting tundish sealing device according to claim 1, characterized in that, Both the first cover plate (200-1) and the second cover plate (200-2) include a frame (210) and a first plate (220). The frame (210) surrounds the periphery of the first plate (220), and a connecting edge (211) extends from one side of the frame (210). The connecting edge (211) is hinged to the edge of the cover.

6. The continuous casting tundish sealing device according to claim 5, characterized in that, The first plate (220) includes a first metal shell and a first refractory material filling layer located inside the first metal shell. The first metal shell is also provided with a plurality of first fasteners (221), and the first fasteners (221) penetrate through the first refractory material filling layer and the first metal shell.

7. The continuous casting tundish sealing device according to claim 6, characterized in that, The first fastener (221) is a steel bar, and the first fastener (221) has a V-shaped structure, with the opening of the first fastener (221) facing the cover.

8. The continuous casting tundish sealing device according to any one of claims 1 to 7, characterized in that, It also includes a baking hole cover plate (100), which is placed on the baking hole of the cover and covers the baking hole.

9. The continuous casting tundish sealing device according to claim 8, characterized in that, The baking hole cover plate (100) includes a second plate body (101) and a baking lifting ring (102) disposed on the side of the second plate body (101) away from the cover. The baking hole cover plate (100) includes a second metal shell and a second refractory material filling layer located inside the second metal shell. The second metal shell is also provided with a plurality of second fasteners (103), and the second fasteners (103) penetrate through the second refractory material filling layer and the second metal shell.

10. A continuous casting tundish, comprising a continuous casting tundish sealing device, characterized in that, The continuous casting tundish sealing device is the continuous casting tundish sealing device according to any one of claims 1 to 9.

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