Embedded guard plate and tundish provided with embedded guard plate

Abstract

The utility model discloses an embedded guard plate and a tundish provided with the embedded guard plate, and belongs to the technical field of steelmaking continuous casting. The protective plate comprises a protective plate body and an anchoring part, and the protective plate body is a fire-resistant protective plate; the anchoring part is fixedly connected with the protection plate body, the anchoring part comprises at least two forked parts extending out relative to the protection plate body, and the forked parts can be connected with a tundish. The connecting strength of the protective plate body and the tundish can be enhanced by means of the anchoring part, and the protective plate body is prevented from being deformed or damaged due to erosion of molten steel and slag in the pouring process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steelmaking continuous casting technology, especially to a pre-embedded protective plate and a tundish installed with the pre-embedded protective plate. BACKGROUND

[0002] The tundish is an intermediate link in the steelmaking production process and a link between intermittent operation and continuous operation. As a metallurgical reactor, the tundish is an important part of improving steel yield and quality. The tundish plays a role in shunting, continuous casting, pressure reduction, protection, and impurity removal during continuous casting.

[0003] In recent years, with the popularization and application of the tundish rapid replacement technology, the service life of the tundish has been continuously improved. Currently, steel plants use externally mounted protective plates at the positions of the tundish that are severely eroded to improve the continuous casting furnace number of the tundish. However, the molten steel and slag are easily eroded from the edge of the protective plate in the later stage, resulting in the deformation and failure of the protective plate due to curling. The externally mounted protective plate is prone to falling off in the later pouring stage, and the externally mounted protective plate reduces the steel capacity of the tundish. SUMMARY

[0004] Therefore, it is necessary to provide a pre-embedded protective plate and a tundish installed with the pre-embedded protective plate to solve the problem that the externally mounted protective plate of the existing tundish is easily eroded and damaged.

[0005] In a first aspect, the utility model provides a pre-embedded protective plate, comprising:

[0006] A protective plate body, the protective plate body is a refractory protective plate;

[0007] An anchor, fixedly connected with the protective plate body, the anchor comprises at least two forked parts protruding from the protective plate body, and the forked parts can be connected with the tundish.

[0008] Further, the forked parts are two and are oppositely arranged.

[0009] Further, the anchor is V-shaped, two forked parts are opposite to one end of the protective plate body, and are connected with each other and the protective plate body.

[0010] Further, the anchor is Y-shaped, the anchor further comprises a connecting part, two forked parts are opposite to one end of the protective plate body, and are connected with one end of the connecting part, respectively, and the other end of the connecting part is connected with the protective plate body.

[0011] Further, the anchor is provided with a plurality of and is oppositely arranged.

[0012] Further, the protective plate body is a regular cuboid.

[0013] Further, the top of the shield body is provided with at least two lifting lugs, and the lifting lugs are fixedly connected with the shield body.

[0014] In a second aspect, the utility model provides a tundish installed with embedded shield plate, including tundish body, a plurality of shield body is mutually spliced and is embedded in the inside of tundish body, and the anchor is embedded in tundish body.

[0015] Further, the shield body is arranged on the long face opposite the impact area of the tundish body.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) the embedded tundish shield plate for increasing the number of continuous casting furnaces of the tundish is provided with a shield body, the shield body is a refractory shield plate, the shield body has high high-temperature resistance, can better resist the corrosion of molten steel and slag, thereby prolonging the service life of the shield plate and reducing the deterioration or damage of the shield plate material caused by excessively high temperature.

[0018] (2) the embedded tundish shield plate for increasing the number of continuous casting furnaces of the tundish is provided with an anchor, the anchor is fixedly connected with the shield body to form a stable connection structure, avoiding loosening of the anchor and the shield body. The anchor is provided with at least two forked parts extending from the shield body, the forked parts can be effectively connected with the structure of the tundish, so that the anchor can be more closely combined with the structure of the tundish, the shield body can better adapt to the shape and stress state of the tundish, and deformation or damage of the shield body caused by corrosion of molten steel and slag during pouring is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0020] Figure 1 It is a structure schematic of the shield body in the utility model;

[0021] Figure 2 It is a structure schematic of the anchor in the utility model Figure 1 ;

[0022] Figure 3 It is a structure schematic of the anchor in the utility model Figure 2 ;

[0023] Figure 4 It is a splicing structure schematic of a plurality of shield bodies in the utility model;

[0024] Figure 5 is a structure schematic view of the tundish in the utility model;

[0025] Figure 6 is Figure 5 a structure schematic view of A in the partial enlargement.

[0026] In the figure, 100, a guard plate body; 110, an ear;

[0027] 200, an anchor; 210, a bifurcated part; 220, a connecting part;

[0028] 300, a tundish; 310, a tundish body. DETAILED DESCRIPTION

[0029] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the present application, and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.

[0030] The pre-embedded guard plate and the tundish installed with the pre-embedded guard plate in the embodiment relate to the steelmaking continuous casting technical field, the anchor 200 is installed on the guard plate body 100, the anchor 200 is used to be embedded in the inner side of the tundish 300, compared with the externally-hung guard plate, the connection strength of the pre-embedded guard plate and the tundish 300 can be strengthened. The guard plate body 100 is made of refractory material, has higher resistance to high temperature and corrosion of molten steel, and has longer service life.

[0031] Please refer to Figures 1 to 6 The pre-embedded guard plate in the embodiment comprises a guard plate body 100 and an anchor 200, the guard plate body is a refractory guard plate, the guard plate body has higher high-temperature resistance, can better resist the corrosion of molten steel and slag, thereby prolonging the service life of the guard plate and reducing the deterioration or damage of the guard plate material caused by excessively high temperature.

[0032] The anchor 200 is fixedly connected with the guard plate body 100, forms a stable connection structure, and avoids loosening of the anchor 200 and the guard plate body 100. The anchor 200 is provided with at least two bifurcated parts 210 extending relative to the guard plate body, the bifurcated parts 210 can effectively be connected with the structure of the tundish 300, so that the anchor 200 can be more closely combined with the structure of the tundish 300, the guard plate body 100 can better adapt to the shape and stress state of the tundish 300, and the guard plate body 100 can be prevented from being deformed or damaged due to the corrosion of molten steel and slag in the pouring process.

[0033] In some embodiments, please refer to Figures 1 to 3, two bifurcations 210 are arranged opposite to each other, so that the anchor 200 is more firmly connected with the tundish 300. The cross structure can provide multiple support forces, avoid stress concentration in a single direction, and thus improve the stability of the fixed guard plate. The cross structure of the cross part can effectively reduce the risk of loosening or falling off of the guard plate due to external force (such as impact of molten steel or slag, thermal expansion, etc.).

[0034] As one of the embodiments, please refer to Figure 2 The anchor 200 is V-shaped, and the cross structure of the V-shaped anchor 200 enables the bifurcations 210 to form a more intimate combination when contacting the guard plate body 100, thereby improving the connection stability between the guard plate and the tundish 300. After the two bifurcations 210 are connected to each other, a firm overall structure is formed, which effectively prevents the guard plate from loosening or falling off due to uneven stress or external vibration during use.

[0035] In the specific implementation process, the two bifurcations 210 form a connection site when connected to each other, and the distance between the ends of the two bifurcations 210 away from the connection site and the guard plate body 100 is 30 mm. The connection site is 20 mm deep into the guard plate body 100, which can increase the contact area between the two bifurcations 210 and the guard plate body 100, so that the anchor 200 can be more closely connected with the guard plate body 100, and the connection strength between the anchor 200 and the guard plate body 100 is improved.

[0036] In addition, the V-shaped anchor 200 can more effectively disperse stress when subjected to external force (such as impact of molten steel or slag), and the V-shaped structure uniformly distributes stress to the connection points between the guard plate body 100 and the tundish 300, reducing the risk of deformation or damage of the guard plate caused by concentrated stress.

[0037] As one of the embodiments, please refer to Figure 3 The anchor 200 is Y-shaped, and the anchor 200 further includes a connecting part 220. The ends of the two bifurcations 210 close to the guard plate body 100 are respectively connected to one end of the connecting part 220, and the other end of the connecting part 220 is connected to the guard plate body 100. The Y-shaped anchor 200 structure provides better stability than traditional straight or V-shaped anchors 200. The bifurcations 210 form a more intimate fixed system through the connection of the connecting part 220 and the guard plate body 100, so that the guard plate is not easy to loosen or fall off under the action of high temperature and external force. The additional fixed point of the connecting part 220 can strengthen the stable connection between the anchor 200 and the guard plate body 100, and further reduce the failure or falling off of the guard plate due to uneven stress or severe vibration.

[0038] The Y-shaped structure can effectively disperse the pressure to different areas of the shield body 100 when subjected to external force, avoiding stress concentration and reducing deformation, cracks or damage to the shield caused by molten steel, slag impact or thermal expansion, etc.

[0039] It should be noted that, regardless of the Y-shaped or V-shaped anchor 200, the anchor 200 can be provided with multiple bifurcated parts 210, so that each bifurcated part 210 provides a supporting force, avoiding stress concentration in a single direction, thereby improving the stability of the shield fixation.

[0040] In some embodiments, the anchor 200 is provided with multiple and relatively arrayed, which can significantly improve the fixation stability between the shield and the tundish 300. By distributing multiple anchors 200, the stress can be dispersed in a wider area, avoiding failure or deformation of a single anchor point due to excessive local pressure. In this way, the shield can more evenly withstand external impact and thermal expansion in a high-temperature and high-pressure environment, reducing the risk of damage caused by local stress concentration.

[0041] Due to the uniform distribution of multiple anchors 200, the overall supporting force of the shield is increased, thereby significantly improving the anti-deformation ability of the shield. During molten steel pouring, multiple anchors 200 disperse the external applied force, avoiding the shield from warping, bending or deforming due to uneven stress.

[0042] In some embodiments, referring to Figure 1 and Figure 4 , the shield body 100 is a regular cuboid. As a regular geometric shape, the cuboid is relatively simple to manufacture and process, suitable for standardized production processes. Manufacturers can use conventional cutting, grinding and welding techniques for processing, reducing the complexity and cost of manufacturing.

[0043] The cuboid shape makes the installation of the shield more convenient. Its regular geometric shape makes the shield cooperate with the tundish 300 more accurately, ensuring that it can be accurately embedded into the predetermined position. When installing, the cuboid shield has a larger contact surface, and it is not easy to appear deviation or asymmetry problem during fixation.

[0044] In some embodiments, referring to Figure 1The top of the shield body 100 is provided with at least two lifting lugs 110, which are fixedly connected with the shield body 100. The setting of the lifting lug 110 makes the installation and disassembly of the shield more convenient and fast. During the installation process, the lifting lug 110 can be connected with hoisting equipment (such as a crane, a hoist, etc.) to easily hoist the shield body to the predetermined position of the tundish 300. The lifting lug 110 provides a fixed hanging point, making the installation of the shield more accurate and reducing errors during the installation process. When disassembling, the lifting lug 110 also facilitates the quick removal of the shield, improving maintenance efficiency.

[0045] The setting of the lifting lug 110 increases the safety during hoisting. Through fixed connection of the lifting lug 110, it can be ensured that the shield is stably hung during hoisting and is not easy to deviate or fall, reducing the risk of accidents.

[0046] In some embodiments, the shield body 100 is specifically corundum or aluminum-magnesium. The corundum or aluminum-magnesium is mixed according to the design ratio, an appropriate amount of binder (such as clay or organic adhesive) is added, the lifting lug 110 and the anchor 200 are inserted, and then the shield body 100 blank is pressed or cast into a shape. The formed shield body 100 blank is placed in a high-temperature furnace for sintering treatment. The sintering temperature is usually between 1500°C and 1700°C to ensure the effective combination of aluminum and magnesium and form a stable crystal structure, improving the refractoriness and thermal shock resistance of the shield. The shield body 100 after sintering is subjected to further processing, cutting or polishing treatment to ensure its dimensional accuracy and surface finish.

[0047] The performance parameters of the shield body 100 are: after drying at 110°C for 24h, the bending strength is ≥12Mpa, and the compressive strength is ≥70Mpa; after burning at 1500°C for 3h, the bending strength is ≥15Mpa, and the compressive strength is ≥90Mpa, and the linear change rate is -1%~+1%.

[0048] Please refer to Figure 5 and Figure 6 A tundish installed with a pre-embedded shield in the embodiment, the tundish 300 includes a tundish body 310, and a plurality of shield bodies 100 are spliced with each other and embedded on the inner side of the tundish body 310, which can effectively protect the tundish body 310 from being eroded and damaged by high-temperature molten metal or other high-temperature substances. Especially in high-temperature environments such as steel smelting and casting, the inner wall of the tundish 300 will be subjected to extremely high temperature impact and heat conduction, and the shield body 100 can effectively prolong the service life of the tundish body 310. The anchor 200 is embedded in the tundish body 310 to fix and stabilize the shield body 100 on the inner side of the tundish body 310. Due to the presence of the anchor 200, the shield body 100 can be firmly fixed on the inner wall of the tundish body 310, avoiding displacement, falling off or damage of the shield due to thermal expansion or mechanical impact at high temperature.

[0049] In the specific implementation process, the shell 310 is used as the shell of the tundish 300, the shield body 100 is arranged inside the shell, the working lining film is first placed on the shell, the shield body 100 is hoisted to the long side opposite to the impact area of the tundish 300, is tightly placed between the shield body 100 and the shell to form a sandwich cavity, the dry refractory material is filled into the cavity, and the anchor 200 is embedded in the dry refractory material, so that the shell, the anchor 200 and the shield body 100 are integrated as a whole, the connection stability of the shield body 100 and the shell 310 can be improved, and the impact resistance and high-temperature resistance of the tundish 300 as a whole can be improved.

[0050] The anchor 200 is arranged relative to the inner wall of the shell, and in some embodiments, please refer to Figure 5 The shield body 100 is arranged on the long side opposite to the impact area of the shell 310, and the shield body 100 is arranged on the long side opposite to the impact area of the shell 310, so that the pressure caused by the metal flow, temperature change and external mechanical impact in the smelting process can be effectively absorbed and dispersed, the direct action of the impact force on the shell 310 is reduced, and the shell 310 is prevented from being damaged, especially in the high-impact and high-temperature operation process such as molten metal flow, casting and pouring.

[0051] Work flow: first, the anchor 200 of the shield body 100 is arranged relative to the inner wall of the shell 310, the dry refractory material is filled between the shield body 100 and the shell 310, the anchor 200 is embedded in the dry refractory material, the fixing of the shield body 100 and the shell 310 is completed, and a new tundish 300 is formed. After the molten steel is poured into the tundish 300, the molten steel splashes from the direct impact area and splashes relative to the shield body 100, and the shield body 100 can protect the inner lining of the tundish 300 and reduce the damage of the molten steel to the tundish 300.

[0052] In the specific implementation process, the long side of the tundish 300 of the continuous casting machine of a steel plant before using the pre-embedded shield has a maximum service life of 45h and can continuously cast 85 furnaces. After the pre-embedded shield is used on the long side of the tundish 300, the service life of the tundish is increased to 50h and the number of continuous casting furnaces is 112, the service life is increased by 11%. The tundish 300 with a service life of 45h is taken offline 16 times per month, the tundish 300 with a service life of 50h is taken offline 14.4 times per month, the number of tundishes used is reduced by 1.6, the head and tail billets of the continuous casting machine are reduced by 6.752 tons, the casting surplus of the tundish is reduced by 7.968 tons, the material cost is saved, and remarkable economic benefits are achieved.

[0053] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the present application.

Claims

1. A pre-embedded fender, characterized in that, The application relates to a refractory shield plate. The shield plate body is a refractory shield plate. The anchor is fixedly connected with the shield plate body, and comprises at least two forked parts extending from the shield plate body.

2. A pre-embedded fender according to claim 1, wherein, The two forked parts are oppositely arranged.

3. A pre-embedded fender according to claim 2, wherein, The anchor is V-shaped, and the two forked parts are oppositely arranged at one end of the shield plate body and connected with the shield plate body.

4. A pre-embedded fender according to claim 2, wherein, The anchor is Y-shaped, and further comprises a connecting part, and the two forked parts are respectively connected with one end of the connecting part, and the other end of the connecting part is connected with the shield plate body.

5. A pre-embedded fender according to any one of claims 1 to 4, characterized in that The anchor is arranged in an array.

6. A pre-embedded fender according to claim 1, wherein, The shield plate body is a regular cuboid.

7. A pre-embedded fender according to claim 1, wherein The top of the shield plate body is provided with at least two lifting lugs fixedly connected with the shield plate body.

8. A tundish provided with a pre-embedded shield according to any one of claims 1 to 7, characterized in that The shield plate body is embedded in the package body.

9. The tundish installed with the pre-embedded shield according to claim 8, characterized in that, The shield plate body is arranged on the long face opposite to the impact area of the package body.

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